Signaling Or Indicating Condition Of Cutting In Cuttings Retainer Patents (Class 175/46)
  • Patent number: 9238948
    Abstract: A gas analysis system for determining the gas content of subterranean strata. A boring operation is commenced to form a borehole into or through a subterranean formation, such as a coal or shale formation to determine the gas content thereof. The drill fluid, cuttings and any desorbed gas is carried from the downhole location to surface analysing equipment in a closed system, so that the desorbed gases are not exposed to the air. The drill stem is capped or sealed at the surface, as well as the wellbore annulus to effectively seal the drill liquid, cuttings and desorbed gasses. The drill fluid, cuttings and desorbed gasses from the formation are coupled from the wellhead apparatus to the gas processing equipment via a closed system so that the constituents and volume of the gas can be determined.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: January 19, 2016
    Inventor: Ian Gray
  • Patent number: 9103176
    Abstract: A coring apparatus may be integrated with fluid analysis capabilities for in situ analysis of core samples from a subterranean formation. An instrumented coring apparatus may include an inner core barrel; an outer core barrel; a coring bit; and an instrumented core barrel having an analysis device in fluid communication with the inner core barrel.
    Type: Grant
    Filed: February 8, 2012
    Date of Patent: August 11, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ludovic Delmar, Will Bradford, Ron Dirksen, Lorne Rutherford
  • Publication number: 20140238744
    Abstract: In one aspect, an apparatus for use during drilling of a wellbore is provided, that in one embodiment may include: a receiving device that receives cuttings from the separator; a sensor for providing information relating to weight of the cuttings received by the receiving device for determining the weight of the cuttings received. In another aspect, a method of determining amount of cuttings received in a fluid from a wellbore is disclosed that in one embodiment may include: separating the cuttings from the fluid; receiving the separated cuttings on a member; determining weight of the cuttings received using a sensor associated with the receiving device.
    Type: Application
    Filed: February 22, 2013
    Publication date: August 28, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Anders K. Nesheim, Kjetil Rosdal, Tarald T. Pedersen, Steve T. Pedersen
  • Patent number: 8689903
    Abstract: A coring apparatus is provided, which apparatus, in one exemplary embodiment, includes a rotatable member coupled to a drill bit configured to drill a core from a formation, a substantially non-rotatable member in the rotatable member configured to receive the core from the formation, and a sensor configured to provide signals relating to rotation between the rotatable member and the substantially non-rotatable member during drilling of the core from the formation, and a circuit configured to process the signals from the sensor to estimate rotation between the rotatable member and the non-rotatable member.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: April 8, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Chris C. Beuershausen, Juan Miguel Bilen, Larry M. Hall, Thomas Uhlenberg, Jason R. Habernal
  • Patent number: 8602128
    Abstract: Systems and methods for analysis of drilling cuttings are described. Complex permittivity is measured of rock cutting samples obtained during drilling operations. The origin of the cuttings is known by flow rate analysis in the drilling system. Various means can be used for rock cutting dielectric measurement. For example, the dielectric measurement can be made by matching the unknown permittivity of the medium to be analyzed to the permittivity of known liquid mixtures by successive saturation and looking for a “zero-contrast” measurement.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: December 10, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Patrice Ligneul, Valerie Judith Anderson, Tianhua Zhang, Gerald Henry Meeten, Andrew Clarke, Mohammed Badri
  • Patent number: 8596383
    Abstract: A method for detecting hydrocarbon zones in a geological formation, including obtaining a plurality of pulverized drill cutting samples representative of the geological material encountered at measured depth intervals, each drill cutting obtained at periodic intervals during the drilling process; measuring each cutting sample with a color measuring device to obtain a value representing the degree of lightness of the particular cutting sample; and analyzing the measured lightness values by order of borehole depth that the respective cutting sample was obtained to determine the presence of geological zones likely to possess producible hydrocarbons. L* data may be combined with other well logging data to improve the hydrocarbon layer determination accuracy. A method also for locating the drill bit within a desired hydrocarbon layer during directional drilling.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: December 3, 2013
    Assignee: Encana Oil & Gas (USA) Inc.
    Inventors: Mark W. Montie, Charles L. Vavra
  • Publication number: 20130277113
    Abstract: A system and method for solid-liquid separation and analysis of drilling fluids is described. The method includes heating a retort body to a pre-determined temperature, with an inner wall of the retort body at least partially defines a chamber within the retort body. A sample drilling fluid may be automatically injected into the inner chamber, and a film of the sample drilling fluid may be generated on the inner wall of the retort body. The film may be separated into a solid portion and a vapor. The method may further include collecting vapor using a vent that provides fluid communication with the inner chamber, and condensing the vapor into a fluid portion of the film. The volume of the fluid portion may them be automatically measured.
    Type: Application
    Filed: April 20, 2012
    Publication date: October 24, 2013
    Inventor: Robert J. Murphy
  • Publication number: 20130062124
    Abstract: In one aspect, the disclosure provides a method of drilling a wellbore, which method, in one embodiment, includes the features of drilling the wellbore with a drill string that includes a bypass device having a fluid passage therethrough by supplying a fluid through the bypass device, wherein the drilling fluid circulates to the surface via an annulus between the drill string and the wellbore; defining a time period (locking time); initiating a selected drilling parameter; detecting downhole the selected drilling parameter and one of the second flow rate and a differential pressure; and activating the bypass device when the selected drilling parameter and one of the second flow rate and the differential pressure are present during the defined time period to divert a portion of the drilling fluid from the bypass device to the annuls. In one aspect, the selected drilling parameter is rotation of a member associated with the bypass device.
    Type: Application
    Filed: September 9, 2011
    Publication date: March 14, 2013
    Applicant: BAKER HUGHES INCORPORATED
    Inventors: Ingo Roders, Thorsten Regener
  • Publication number: 20120285742
    Abstract: A method for detecting hydrocarbon zones in a geological formation, including obtaining a plurality of pulverized drill cutting samples representative of the geological material encountered at measured depth intervals, each drill cutting obtained at periodic intervals during the drilling process; measuring each cutting sample with a color measuring device to obtain a value representing the degree of lightness of the particular cutting sample; and analyzing the measured lightness values by order of borehole depth that the respective cutting sample was obtained to determine the presence of geological zones likely to possess producible hydrocarbons. L* data may be combined with other well logging data to improve the hydrocarbon layer determination accuracy. A method also for locating the drill bit within a desired hydrocarbon layer during directional drilling.
    Type: Application
    Filed: May 11, 2011
    Publication date: November 15, 2012
    Inventors: Mark W. Montie, Charles L. Vavra
  • Publication number: 20120273273
    Abstract: Systems and methods for analysis of drilling cuttings are described. Complex permittivity is measured of rock cutting samples obtained during drilling operations. The origin of the cuttings is known by flow rate analysis in the drilling system. Various means can be used for rock cutting dielectric measurement. For example, the dielectric measurement can be made by matching the unknown permittivity of the medium to be analyzed to the permittivity of known liquid mixtures by successive saturation and looking for a “zero-contrast” measurement.
    Type: Application
    Filed: April 29, 2011
    Publication date: November 1, 2012
    Applicant: Schlumberger Technology Corporation
    Inventors: Patrice Ligneul, Valerie Judith Anderson, Tianhua Zhang, Gerald Henry Meeten, Andrew Clarke, Mohammed Badri
  • Patent number: 8215028
    Abstract: A system for slurrifying drill cuttings including a cuttings dryer, a pump, and a transfer line fluidly connecting the cuttings dryer and the pump, the transfer line having a fluid inlet for receiving a fluid. Furthermore, the system for slurrifying drill cuttings including a storage vessel fluidly connected to the pump for storing a slurry. Additionally, a method for slurrifying drill cuttings including drying drill cuttings in a cuttings drying to produce dry cuttings and combining a fluid with the dry cuttings to produce a slurry. Furthermore, the method includes mixing the slurry and the dry cuttings in a mixing pump and transferring the slurry to a storage vessel.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: July 10, 2012
    Assignee: M-I L.L.C.
    Inventor: Jan Thore Eia
  • Publication number: 20090145661
    Abstract: A system and method for detecting a cuttings bed that includes a drill bit, a drillstring and a cuttings bed detector. The cuttings bed detector is positioned uphole of the drill bit. The method includes the steps of positioning a drill bit downhole, and positioning a cuttings bed detector uphole of the drill bit.
    Type: Application
    Filed: December 7, 2007
    Publication date: June 11, 2009
    Applicant: Schlumberger Technology Corporation
    Inventors: Benjamin P. Jeffryes, Bruce W. Boyle
  • Publication number: 20080283295
    Abstract: A system for slurrifying drill cuttings including a cuttings dryer, a pump, and a transfer line fluidly connecting the cuttings dryer and the pump, the transfer line having a fluid inlet for receiving a fluid. Furthermore, the system for slurrifying drill cuttings including a storage vessel fluidly connected to the pump for storing a slurry. Additionally, a method for slurrifying drill cuttings including drying drill cuttings in a cuttings drying to produce dry cuttings and combining a fluid with the dry cuttings to produce a slurry. Furthermore, the method includes mixing the slurry and the dry cuttings in a mixing pump and transferring the slurry to a storage vessel.
    Type: Application
    Filed: May 15, 2008
    Publication date: November 20, 2008
    Applicant: M-I LLC
    Inventor: Jan Thore Eia
  • Publication number: 20080202811
    Abstract: An apparatus and method for analyzing the continuous flow of drilling cuttings in real time on a surface while drilling employs a set of sensors placed around an analyzer tube and main auger or within the main auger related to the formation with a defined space-time shift. The method includes measuring the sample to obtain specific properties related to physical and petrophysical parameters of this formation (radiation, resistivity, inductivity, density, elasticity, others). Obtained signals are conditioned and digitized in order to derive the desired discrimination in target properties, such as rock type, porosity, density, and oil saturation. An expanding auger, with a hollow end adapted to receive a sensor tube in which the sensors or sources may be placed, is adapted to rotate or circulate a discrete media about the sensors.
    Type: Application
    Filed: February 19, 2008
    Publication date: August 28, 2008
    Inventor: Konstandinos ZAMFES
  • Publication number: 20080196942
    Abstract: A system for determining produced drill solids volume including a receiving vessel for receiving drill solids and a pressure vessel coupled to the receiving vessel. The receiving vessel has an isolation valve system to control the flow of drill solids between the receiving vessel and the pressure vessel, and the pressure vessel is adapted to allow a compressed gas to convey drill solids from the pressure vessel to a discharge line. The system also includes a skid having a plurality of weight sensors for weighing the drill solids in the pressure vessel, wherein the pressure vessel is disposed on the plurality of weight sensors and a programmable logic controller operatively couples to at least the plurality of weight sensors for calculating the weight of the drill solids in the pressure vessel.
    Type: Application
    Filed: February 15, 2008
    Publication date: August 21, 2008
    Applicant: M-I LLC
    Inventors: Richard Bingham, Gordon M. Logan, Jan Thore Eia
  • Patent number: 7204323
    Abstract: Systems and methods are described for detection and removal of underground organic and inorganic compounds utilizing underground boring tool technology. Typically a drilling fluid is flowed through a pipe or drill string, over the boring tool, and back up the bore hole to the surface in order to remove cuttings and dirt at the surface. Solids and liquids discharged at the surface are analyzed real-time to determine concentrations and locations of compounds in the subsurface and determine the geology of the formation. Detectors can also be attached directly to the head of the boring apparatus and data transmitted to the surface electronically or by other means. Data is processed and evaluated. Based on this information, the boring tool is continually re-directed along an underground path to the areas with the highest concentrations of minerals, oil, gas, toxic compounds or other elements or compounds of interest.
    Type: Grant
    Filed: October 18, 2003
    Date of Patent: April 17, 2007
    Inventor: Gordon Bruce Kingsley
  • Patent number: 6986396
    Abstract: A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass” in versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: January 17, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Alan Terry Hemphill
  • Patent number: 6662884
    Abstract: A new method for evaluating the efficiency of a sweep for removing cuttings from a borehole in a subterranean formation during a drilling operation. The method evaluates sweep efficiency on a “mass in” versus “mass out” basis. The method uses downhole density readings taken with a pressure-while-drilling tool inserted in the drill string. Measurements of hydrostatic pressure are converted into equivalent circulating density measurements which in turn are used in calculating the sweep efficiency. The method affords real time estimates at the wellsite of the quantity of formation cuttings brought out of a wellbore by a sweep.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: December 16, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Alan Terry Hemphill
  • Patent number: 6457538
    Abstract: A system of apparatus for use in a coring tool measures the height of a core sample being recovered and transmits data relative thereto to the surface of a formation concurrently during the coring operation. A transmitter of an electromagnetic ranging system rides atop a core sample being formed in the barrel chamber and a receiver member of the electromagnetic ranging system is fixed at a top end of the barrel it known distance above the transmitter. During the coring operation the transmitter transmits a fixed frequency signal to the receiver through drilling fluid disposed therebetween. The distance between the transmitter and receiver decreases and the amplitude of the transmitted signal changes as a function of the separation distance between the transmitter and receiver as the core sample enters the inner barrel and the height of the core sample within the barrel is determined as a function of time and depth.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: October 1, 2002
    Assignee: Maurer Engineering, Inc.
    Inventors: Gerard T. Pittard, J. Christopher Hetmaniak, Curtis Leitko, William J. Mcdonald
  • Patent number: 6453727
    Abstract: System of evaluating physical parameters such as the absolute permeability of porous rocks of a zone of an underground reservoir, from fragments taken from this zone, such as rock cuttings carried along by the drilling mud. Rock fragments (F) are immersed in a viscous fluid contained in a vessel (1). Pumping means (2, 3) first inject into vessel (1) a fluid under a pressure that increases with time, up to a determined pressure threshold, so as to compress the gas trapped in the pores of the rock. This injection stage is followed by a relaxation stage with injection stop. The pressure variation measured by detectors (7, 8) during these two successive stages is recorded by a computer (9). The evolution of the pressure during the injection process being modelled from initial values selected for the physical parameters of the fragments, the computer adjusts them iteratively so as to best get the modelled pressure curve to coincide with the pressure curve really measured. Application: petrophysical measurement.
    Type: Grant
    Filed: June 19, 2001
    Date of Patent: September 24, 2002
    Assignee: Institut Francais Du Petrole
    Inventors: Roland Lenormand, Patrick Egermann
  • Patent number: 6453738
    Abstract: A method and apparatus for retrieving magnetic casing fragments from a well using a shrouded magnet are disclosed. Retrieving casing fragments allows the determination of weight loss from the casing to assist in analyzing the integrity and the condition of the casing and to determine whether more expensive analysis is required. The shrouded magnet, that is formed by a non-magnetic container enclosing a source of magnetic field, recovers metal casing fragments by attracting them and other magnetic materials from oil and gas well fluids passing by the shrouded magnet device, which fragments are easily separated from the device by removing the source of magnetic field from the container.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: September 24, 2002
    Assignee: Cesmat Service Company, Inc.
    Inventors: Mark Cesmat, Don Holland
  • Patent number: 6158511
    Abstract: A method and apparatus for perforating and stimulating a subterranean formation which is penetrated by a well bore having casing positioned therein so as to establish fluid communication between the formation and the well bore. Substantially rigid, flexible, or liquid propellant is interposed between the casing and at least one shaped charge in a subterranean well bore and is ignited due to the shock, heat and/or pressure generated from the detonated charge. Upon burning, the propellant material generates gases which clean perforations formed in the formation by detonation of the shaped charge(s) and which extend fluid communication between the formation and the well bore.
    Type: Grant
    Filed: July 6, 1998
    Date of Patent: December 12, 2000
    Assignee: Marathon Oil Company
    Inventor: David S. Wesson
  • Patent number: 6105688
    Abstract: An apparatus for use in a subterranean well includes a downhole energy source, a first switch, a second switch, a detonator, a first controller and a second controller. The first switch has a first predetermined state to transfer energy from the energy source, and the second switch has a second predetermined state to transfer the energy from the energy source. A detonator receives the energy from the energy source when the first switch and second switches are concurrently in the first and second predetermined states. A first controller independently detects a predetermined stimulus that is transmitted from the surface of the well and causes the first switch to enter to first predetermined state based on the detection by the first controller. A second controller independently detects the predetermined stimulus transmitted from the surface of the well and causes the second switch to enter the second predetermined state based on the detection by the second controller.
    Type: Grant
    Filed: July 22, 1998
    Date of Patent: August 22, 2000
    Assignee: Schlumberger Technology Corporation
    Inventors: Vladimir Vaynshteyn, Christian C. Spring
  • Patent number: 6098707
    Abstract: A perforating gun for perforating a section of a well casing in which a plurality of explosive charge units are mounted on an elongated mounting strip in a pattern corresponding to the desired pattern of perforations in the well casing. The areas of the mounting strip that receive the charge units have a greater width than the remaining areas of the strip to provide an increased support surface for the charge units. Each charge unit is formed by a case connected to a cap to provide a housing for the explosive. The cap is crimped to the case to prevent premature detonation of the explosive.
    Type: Grant
    Filed: April 24, 1998
    Date of Patent: August 8, 2000
    Assignee: The Ensign-Bickford Company
    Inventors: Stan Pastusek, Larry Goin, Tom Ricles
  • Patent number: 6062310
    Abstract: A tubing conveyed perforating apparatus is shown which includes a tubular assembly made up of a plurality of tubular sections. A plurality of explosive charges are located within the interior bore of at least two of the tubular sections of the tubular assembly. A firing head is carried on the tubular assembly for detonating the explosive charges to perforate a surrounding well bore. The firing head has a concentric detonator arrangement within a hollow central bore. The explosive charges are held within the interior bore of the tubular section by a support. The explosive charges and charge support are comprised of materials which disintegrate upon detonation of the explosive charges, whereby the interior bore of the tubular assembly is fully open after detonation.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: May 16, 2000
    Assignee: Owen Oil Tools, Inc.
    Inventors: David S. Wesson, Don Shewchenko, James Rollins, Lile Andrich
  • Patent number: 6035784
    Abstract: Rock and other hard materials, such as concrete, are fragmented by a controlled small-charge blasting process. A cartridge containing an explosive charge is inserted at the bottom of a hole drilled in the rock. The explosive charge is configured to provide the desired pressure in the hole bottom, including, if desired, a strong shock spike at the hole bottom to enhance microfracturing. The cartridge is held in place or stemmed by a massive stemming bar of high-strength material such as steel which blocks the flow of gas up the drill hole except for a small leak path between the stemming bar and the drill hole walls. The cartridge-incorporates additional internal volume designed to control the application of pressure in the bottom hole volume by the detonating explosive.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: March 14, 2000
    Assignee: Rocktek Limited
    Inventor: John David Watson
  • Patent number: 6014933
    Abstract: An improved downhole explosive charge carrier is disclosed. The invention uses a unique staggered charge pattern and a mounting configuration which allows the use of a straight, axially-located detonator in order to achieve a greater number of shots per unit length over conventional carriers. The invention also reduces the interference caused by the detonator and the closeness of the shots and thereby increases the performance of the individual charges, allowing smaller charges to be used to achieve the same perforation size.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: January 18, 2000
    Assignees: Weatherford US Holding, L.P. a Louisiana Limited Partnership, Owen Oil Tools, Inc.
    Inventors: Donald V. Umphries, Harold D. Owen, Bobby R. Ford, David S. Wesson
  • Patent number: 5960894
    Abstract: The invention is directed to an expendable tubing conveyed perforator, comprising (a) an outer tube made from a material having high strength and low impact resistance; and (b) an inner structure positioned within the outer tube for holding one or more explosive charges, the inner structure made from a combustible material. The invention is also directed to a method of perforating a well casing using the expendable tubing conveyed perforator system.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: October 5, 1999
    Assignee: Primex Technologies, Inc.
    Inventors: Terry G. Lilly, Leslie E. Noel, Edwin G. Steiner, William Kamper
  • Patent number: 5907132
    Abstract: Methods and apparatus for creating as shear ("S") wave for use in oil and gas exploration, where such S-wave is created by detonating an explosive packaging in a shot hole in a manner that produces directionally controlled S-wave force vectors at each source station across a 3-D survey grid.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: May 25, 1999
    Inventor: Bob A. Hardage
  • Patent number: 5829538
    Abstract: A tubing conveyed perforating apparatus is shown which includes a tubular assembly made up of a plurality of tubular sections. One or more elongate charge holders are located within the interior bore of the tubular assembly and carry explosive charges thereon. A firing head is carried on the tubular assembly for detonating the explosive charges to perforate a surrounding well bore. The charge holders and explosive charges are comprised of materials which disintegrate upon detonation of the explosive charges, whereby the interior bore of the tubular assembly is fully open after detonation.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: November 3, 1998
    Assignee: Owen Oil Tools, Inc.
    Inventors: David S. Wesson, Don Shewchenko
  • Patent number: 5816343
    Abstract: A perforating gun having a base structure made of a deformable material. The base structure includes support rings integrally attached to one another by connector portions. The capsule charges are mounted in corresponding support rings, and each support ring is adjustable by selective deformation of the base structure to face in one of a plurality of directions to provide a plurality of combinations of phasing patterns.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: October 6, 1998
    Assignee: Sclumberger Technology Corporation
    Inventors: Daniel C. Markel, Jorge E. Lopez de Cardenas, Victor M. Vu
  • Patent number: 5814758
    Abstract: A flexible linear shaped charge for discharging a high speed jet to penetrate a target comprising an outer housing which includes a sheath and the high speed jet, the high speed jet being integral with the sheath, and an explosive core disposed within the outer housing between the sheath and the high speed jet, the outer housing comprising a low density matrix mixed with a high density heavy metal powder to increase the confinement of the explosive core, thereby improving the performance of the shaped charge.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: September 29, 1998
    Assignee: Halliburton Energy Services, Inc.
    Inventor: David J. Leidel
  • Patent number: 5797464
    Abstract: A shaped charge and liner having a minimum outside diameter determined by the formula:D.sub.L =2.625-0.3571(6 -D.sub.ID)Where:D.sub.L =Liner Minimum Outside DiameterD.sub.ID =Carrier Inside DiameterThe geometry of the shaped charge reduces the chances of interference between charges by controlling burn time, as does the positioning of the primer cord. The liner has an open end with a minimum outside diameter determined by the formula. The shape of the case and liner is determined by keeping the center of the primer cord a distance not greater than 0.10 (D.sub.ID) from the center line of the carrier, ideally not greater than 0.05 (D.sub.ID). This yields a large diameter, flat shaped charge that may be loaded in a tubular carrier having a charge or perforation density of at least 10 shots per foot.
    Type: Grant
    Filed: May 1, 1997
    Date of Patent: August 25, 1998
    Assignee: Owen Oil Tools, Inc.
    Inventors: Dan W. Pratt, David S. Wesson, Kevin R. George, James A. Rollins
  • Patent number: 5785130
    Abstract: A high density perforating gun having a carrier housing tube and an interior charge holder tube through which are mounted zinc alloy shaped charges in a phased relationship between about 135 and 145 degrees. The 135 to 145 degree phased relationship provides for an 18 shot per foot perforating gun system. The shaped charges of selected length are inserted into the carrier housing tube and held in place by fastener rings fitted to fastener ring slots. The nose ends of the shaped charges are fitted with ears to receive a detonating cord. This positions the primer cord in tension and generally coaxially with the carrier housing tube to prevent charge interference and assure sequential detonation.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: July 28, 1998
    Assignee: Owen Oil Tools, Inc.
    Inventors: David S. Wesson, Dan W. Pratt
  • Patent number: 5785131
    Abstract: A borehole drilling apparatus has a jacket attachable to a well head and through which a drill rod passes and which carries pressurized drilling fluid to a working end of the drill rod and out into an annulus of the borehole. The jacket has a drill rod seal and an outlet port leading from the interior of the jacket to a pressure regulator. The pressure regulator comprises an annular space through which fluid can flow from an inlet to an outlet. The annular space is defined between an inner rod and a surrounding elastomer pipe. In use, the elastomer pipe is squeezed radially inwards toward the inner rod by fluid pressure maintained between the outside of the elastomer pipe and a surrounding housing. A sampling system is in communication with the outlet port at a location upstream of the regulator.
    Type: Grant
    Filed: March 18, 1996
    Date of Patent: July 28, 1998
    Inventor: Ian Gray
  • Patent number: 5775426
    Abstract: A method and apparatus for perforating and stimulating a subterranean formation which is penetrated by a well bore having casing positioned therein so as to establish fluid communication between the formation and the well bore. A shell, sheath or sleeve of propellant material is positioned so as to substantially encircling at least one shaped charge in a subterranean well bore and is ignited due to the shock, heat and/or pressure generated from the detonated charge. Upon burning, the propellant material generates gases which clean perforations formed in the formation by detonation of the shaped charge(s) and which extend fluid communication between the formation and the well bore.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: July 7, 1998
    Assignee: Marathon Oil Company
    Inventors: Philip M. Snider, Joseph P. Haney, Robert L. Haney, David S. Wesson, David A. Cuthill
  • Patent number: 5777257
    Abstract: The invention relates to an explosive charge assembly for cutting tubular members, particularly underwater. The assembly is lowered into the tubular member to a distance where the cut is to be performed. A shaped charge carrier has a pair of parallel circular plates, a casing unitary connected to the plates and a truncated shaped charge liner. An inflatable bladder surrounding the casing expands to create a stand off distance between the wall of the tubular member and the shell of the assembly. A plurality of centralizer members allow to adjust position of the shell in the tubular member prior to detonation.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: July 7, 1998
    Assignee: Senior Power Services, Inc., Demex Division
    Inventor: John J. Kenny
  • Patent number: 5701964
    Abstract: A through-tubing perforating gun and method is provided. The assembly comprises an elongated carrier strip, a plurality of perforating charges, and means for connecting the plurality of charges to the carrier strip. Each of the charges has a focal axis along which a shaped charge explosion occurs in a firing direction when the charge is actuated for use in perforating the casing wall, a cross-section that fits within a circle defined by the smallest inner diameter of the well tubing through which the assembly is intended to pass, and a detonating cord receiving means.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: December 30, 1997
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jerry L. Walker, James P. Lawson, Bennie C. Gill
  • Patent number: 5698814
    Abstract: A penetrating bomb weapon comprising a long hollow cylinder constructed of high strength steel or similar material and including a pointed nose to aid in penetration of media such as concrete, soil, steel or a hardened surface. The cylinder contains an insensitive explosive that is separated into segments by shock attenuating materials so that one segment of the cylinder may detonate without detonating or destroying adjacent segments. The number of segments may be two or more depending on the complexity of the target to be attacked. Initiation of the main charge within each segment is achieved using explosive boosters positioned so that shocks transferred to adjacent segments, and the initiation train of these segments, is minimized. Separation of the segments is accomplished using explosive cutter charges which perforate and/or spall through the case wall of the penetrator bomb.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: December 16, 1997
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Gary H. Parsons, Joseph Gregory Glenn
  • Patent number: 5673760
    Abstract: A perforating gun includes a multiplicity of shaped charges, the multiplicity of shaped charges including a plurality of planes of charges, each plane of charges including a plurality (N) of shaped charges and a detonating cord running down through the axial center of each of the plurality of planes of charges. The plurality (N) of shaped charges are equally spaced at an angle 360/N about the detonating cord. The plurality of planes of charges: (1) are rotated at an angle of 180/N relative to one another, and (2) are axially packed together along the longitudinal axis of the gun so that the charges in one plane are nearly touching the charges in the adjacent plane, yet they all share the same centered detonating cord. The proximity of one plane to another is close enough such that one plane of charges detonates within a few microseconds of its neighboring plane of charges.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: October 7, 1997
    Assignee: Schlumberger Technology Corporation
    Inventors: James Emmert Brooks, Jack Fergurson Lands, Gary Mack Lendermon, Jorge Enrigue Lopez de Cardenas, Robert Al Parrott
  • Patent number: 5662178
    Abstract: A perforating gun having an elongated mounting strip and a selected wave or non-linear, zig-zag form as seen in a plan view, with an outer surface diameter sized for convenient insertion and removal from a well. The mounting strip has a series of openings spaced in intervals for mounting capsule explosive charges in a phased relationship between 0 and 360 degrees. The cross-sectional area of the mounting strip around each opening is selected to prevent fragmentation of the carrier upon detonation of the charges. The mounting strip is preferably metallic with a selected amplitude and wave length. In each opening is an explosive capsule with a hollow cap with a nose for attachment to one of the openings. The cap has an annular, interior thread with a thread run-out of selected width.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: September 2, 1997
    Assignee: Owen Oil Tools, Inc.
    Inventors: Jay R. Shirley, Harrold D. Owen
  • Patent number: 5648635
    Abstract: This invention is in the field of perforating gun systems used, for example, to gain access to underground oil and gas formations. In particular, this invention relates to an expendable holder assembly for shaped charges of such systems.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: July 15, 1997
    Inventors: Norman Gerald Lussier, Michael Norman Lussier
  • Patent number: 5638901
    Abstract: A perforating gun having an elongated, spiral strip with an outer surface, cylindrical about a longitudinal axis, and a diameter sized for convenient entry and removal from a well. The strip has a series of threaded openings spaced in intervals for mounting capsule explosive charges in a phased relationship between 0 and 360 degrees. The cross-sectional area of the strip around each opening is selected to prevent fragmentation of the carrier upon detonation of the charges. The spiral strip is preferably metallic and forms a helical band with a pitch in a range of 12 to 24 inches. In each threaded opening is an explosive capsule with a hollow cap having at one end a threaded nose for attachment to one of the threaded openings. The cap has an annular, interior thread with a thread run-out of selected width at the other end.
    Type: Grant
    Filed: June 2, 1995
    Date of Patent: June 17, 1997
    Assignee: Owen Oil Tools, Inc.
    Inventors: Jay R. Shirley, Harrold D. Owen
  • Patent number: 5598891
    Abstract: An apparatus and method for perforating and fracturing subterranean formations to enhance fluid production. At least one unlined punch charge is loaded into at least one punch charge carrier, and the void spaces in the punch charge carrier are filled with sand. The punch charge carrier is assembled with at least one perforating charge carrier, loaded with at least one perforating charge, and a means for detonation. The assembly is positioned in a well containing a pressurized fluid adjacent the interval to be perforated and/or fractured, and the charges are detonated. The one or more punch charges create one or more apertures in the punch charge carrier, allowing sand to enter the well and be carried by the fluid in the well into the perforations and/or fractures created by the perforating charges and the pressurized fluid. The sand scours and/or props the perforations and/or fractures.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: February 4, 1997
    Assignee: Marathon Oil Company
    Inventors: Philip M. Snider, David S. Wesson
  • Patent number: 5590723
    Abstract: The invention provides a new strip carrier assembly for carrying shaped charges, such as is particularly useful in perforating guns as are utilized to perforate oil and gas wells. The strip carrier includes a coupling member which couples adjacent strip carrier members together to form a contiguous assembly, and which further provides mounting system for a shaped charge so as to maintain uniform spacing even across the coupling junction. Additionally, the carrier assembly includes a novel tab assembly which cooperates with a charge carrier housing configuration to provide a single assemblage of parts which is capable of orienting shaped charges in any one of a plurality of desired orientations relative to the carrier strip.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: January 7, 1997
    Assignee: Halliburton Company
    Inventors: Jerry L. Walker, Victor M. Carrera, Donald R. Carter
  • Patent number: 5571962
    Abstract: A method and apparatus for identifying cuttings from a wellbore is disclosed. The cuttings can be identified by measuring emissions such as alpha, beta, or gamma particles which emanate from the cuttings. A continuous wellbore profile of the alpha or beta emissions can be constructed by measuring the emissions from cuttings taken from different locations in the wellbore, and by documenting such emissions. The effects of cuttings dispersion caused by differing particle sizes can be reduced by collecting cuttings of an intermediate size for analysis. The profile of the intermediate size cuttings can be compared with a well log to identify the original elevation of the cuttings within the wellbore.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: November 5, 1996
    Assignee: Core Holdings B.V.
    Inventors: Daniel T. Georgi, Homer A. Robertson, Mark S. Franks
  • Patent number: 5564499
    Abstract: Linear apertures are created in well casing through the use of linear charges lowered into the well casing in place; hydraulic fracturing conducted through the linear apertures achieves larger and less dissipated fractures than conventional small circular perforations which generate near well bore tortuosity. The linear charges can also be used in open bores and in overbalance perforating.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: October 15, 1996
    Inventors: Roger B. Willis, Phillip M. Halleck, William P. Stoner
  • Patent number: 5565644
    Abstract: An improved shaped charge for generating a jet. A lens shaped waveshaper is positioned within the explosive material of a shaped charge to modify the shape of the divergent detonation wave into a planar wave or a converging wave. The waveshaper is formed with a low sound speed material having a high index of refraction. By reshaping the detonation wave, the acceleration of the shaped charge liner is increased, and the penetration depth and hole size of the jet can be increased. The shaped charge operates more efficiently, thereby requiring less explosive material than a conventional shaped charge.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: October 15, 1996
    Assignee: Western Atlas International, Inc.
    Inventor: Manmohan S. Chawla
  • Patent number: 5551520
    Abstract: The invention is an apparatus for initiating a wellbore perforator comprising a first firing head for generating a first explosive signal when a first actuation signal is applied to the first firing head, a second firing head for generating a second explosive signal when a second actuation signal is applied to the second firing head, a first means for transferring the first explosive signal to shaped charges in the perforator including a first bulkhead interposed between the shaped charges and the first means for preventing transfer of low order initiation of the first means to the shaped charges, and a second means for transferring the second explosive signal to the shaped charges including a second bulkhead interposed between the shaped charges and the second means for preventing transfer of low order initiation of the second means to the shaped charges.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: September 3, 1996
    Assignee: Western Atlas International, Inc.
    Inventors: Robert K. Bethel, Michael B. Grayson, James Ellis
  • Patent number: H1675
    Abstract: An improved capsule-type charge for use in perforating high temperature production zones in oil or gas wells is disclosed. The improvement consists of using a secondary initiating compound as an initiator, such as 1,3,5-Trinitro-2,4,6-Tripicrylbenzene or 2,2',2",4,4',4",6,6',6",-Nonanitroterphenyl. These initiators work well with commercially available high temperature explosives, such as PYX.
    Type: Grant
    Filed: July 22, 1996
    Date of Patent: September 2, 1997
    Assignee: Halliburton Company
    Inventors: James M. Barker, Jerry L. Walker, Robert S. Riggs