With Sample Covering Or Coating Means (1) Dispensed Into Sample Receiver, Or (2) Fluent Patents (Class 175/226)
  • Patent number: 9441434
    Abstract: A pressure coring apparatus comprises a housing having an upper end and a lower end. A valve is coupled to the lower end of the housing and has an open position for entrance of a core and a closed position for retaining and sealing the core within the housing. A piston assembly is moveably disposed within the housing. A first volume is defined within the housing and between the upper end of the housing and the piston assembly. A second volume is defined within the housing between the lower end of the housing and the piston assembly. A pressure relief device is disposed through the housing and operable to maintain pressure within the first volume and the second volume below a target pressure.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: September 13, 2016
    Assignee: National Oilwell Varco, L.P.
    Inventors: Bobby Talma Wilson, David Young McGehee
  • Patent number: 9217306
    Abstract: A coring apparatus comprises a coring bit operable to cut a core. An outer barrel is coupled to and configured to rotate the coring bit. An inner barrel is disposed within the outer barrel and is isolated from rotation with the outer barrel. A fabric sleeve is disposed within the inner barrel and configured to receive the core cut by the coring bit.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: December 22, 2015
    Assignee: NATIONAL OILWELL VARCO L.P.
    Inventor: Bob Talma Wilson
  • Patent number: 8499856
    Abstract: The present disclosure is related to an apparatus for taking a sample in a wellbore during drilling operations. The apparatus may include a drill bit configured to form a core and at least one retractable cutter internal to the drill bit for taking the sample from the core. The apparatus may also include equipment for analyzing the sample, extracting fluid from the sample, testing fluid from the sample, encapsulating the sample, and/or tagging the sample. The present disclosure is also related to a method for taking a core sample without interrupting drilling operations. The method includes taking a core sample using a drill bit configured to take a core sample using internal cutters. The method may also include analyzing the sample, extracting fluid from the sample, analyzing fluid from the sample, encapsulating the sample, and/or tagging the sample.
    Type: Grant
    Filed: April 28, 2011
    Date of Patent: August 6, 2013
    Assignee: Baker Hughes Incorporated
    Inventor: Sunil Kumar
  • Patent number: 8220563
    Abstract: Provided are drill stem assemblies with ultra-low friction coatings for subterraneous drilling operations. In one form, the coated drill stem assemblies for subterraneous rotary drilling operations include a body assembly with an exposed outer surface including a drill string coupled to a bottom hole assembly or a coiled tubing coupled to a bottom hole assembly and an ultra-low friction coating on at least a portion of the exposed outer surface of the body assembly, wherein the coefficient of friction of the ultra-low friction coating is less than or equal to 0.15. The coated drill stem assemblies disclosed herein provide for reduced friction, vibration (stick-slip and torsional), abrasion and wear during straight hole or directional drilling to allow for improved rates of penetration and enable ultra-extended reach drilling with existing top drives.
    Type: Grant
    Filed: August 18, 2009
    Date of Patent: July 17, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Narasimha-Rao Venkata Bangaru, Swarupa Soma Bangaru, legal representative, Adnan Ozekcin, Hyun-Woo Jin, Erika Ann Ooten Biediger, Jeffrey Roberts Bailey, Vishwas Gupta, Mehmet Deniz Ertas, William Curtis Elks, Jr.
  • Publication number: 20120111635
    Abstract: The present invention relates to the field of rock and soil core sampling and more specifically to the preservation of core sample integrity. A sample capsule is described which comprises heat shrink tubing. The sample capsule is located inside a sampling tool such as a core drill bit and activated by electric film heaters also inside the drill bit. A sample capsule front end cap may also be included. A cache mechanism is described which may store one or more sample capsules and front end caps.
    Type: Application
    Filed: April 12, 2011
    Publication date: May 10, 2012
    Inventors: George Caffell, David J. Levitt
  • Publication number: 20120012393
    Abstract: The present disclosure is related to an apparatus for taking a sample in a wellbore during drilling operations. The apparatus may include a drill bit configured to form a core and at least one retractable cutter internal to the drill bit for taking the sample from the core. The apparatus may also include equipment for analyzing the sample, extracting fluid from the sample, testing fluid from the sample, encapsulating the sample, and/or tagging the sample. The present disclosure is also related to a method for taking a core sample without interrupting drilling operations. The method includes taking a core sample using a drill bit configured to take a core sample using internal cutters. The method may also include analyzing the sample, extracting fluid from the sample, analyzing fluid from the sample, encapsulating the sample, and/or tagging the sample.
    Type: Application
    Filed: April 28, 2011
    Publication date: January 19, 2012
    Applicant: Baker Hughes Incorporated
    Inventor: Sunil Kumar
  • Patent number: 7600580
    Abstract: The present invention relates to an apparatus and method for recovering a sample from a subterranean formation. The apparatus comprises a receptacle for receiving a sample and at least two seal assemblies disposed on an inner surface of the receptacle. The seal assemblies can be arranged to allow a portion of the sample therethrough during the sampling process and to retain fluids within the receptacle during recovery of the sample. The seal assemblies can comprise at least one seal. The at least one seal can be provided with at least one fluid pocket configured to change shape as the volume of fluid therein alters in response to a pressure differential. A plurality of pairs of seal assemblies can be spaced along the length of the inner surface of the receptacle.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: October 13, 2009
    Assignee: Corpro Systems Limited
    Inventors: Philippe Cravatte, Nikola Vidman, Pascal Bartette
  • Patent number: 7172036
    Abstract: A soil sample containment device is provided which allows soil samples to be contained within individual sections of a soil sampler liner. The device includes first and second end caps for covering and sealing the respective ends of the soil sampler liner section. Each end cap has a structure for coupling with the opposite end cap for securing the end caps together. The coupling structure for each end cap includes a hook arm and an eye arm. The hook arm of the first end cap can be coupled with the eye arm of the second end cap to secure the end caps together over the ends of the liner section. A flexible sealing material is provided within each end cap for providing a compression seal between the end caps and the liner section. The liner sections can be formed of different lengths and different materials to accommodate different soil tests.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: February 6, 2007
    Assignees: En Novative Technologies, Inc., Kejr, Inc.
    Inventors: Lloyd E. Jacobs, David E. Turriff, John F. Schabron, Susan S. Sorini-Wong, Thomas M. Christy
  • Patent number: 7124841
    Abstract: Disclosed herein are a crustal core sampler, by which a crustal core sample can be cored in a state coated with a flow-able coating material free of any contamination, and a method of coring a core sample using this crustal core sampler. The crustal core sampler comprises a drilling mechanism and a barrel, wherein the barrel is equipped with a flow-able coating material-ejecting mechanism, and a columnar crustal core portion is coated with a flow-able coating material. Alternatively, the crustal core sampler is constructed by a drill pipe and an inner barrel, wherein the inner barrel is equipped with an inner barrel body, a core elevator, a channel-forming member for forming a flow-able coating material-running channel and flow-able coating material-ejecting openings, and a columnar crustal core portion is coated with a flow-able coating material.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: October 24, 2006
    Assignees: Independent Administrative Institution Japan Agency for Marine-Earth Science & Technology, NLC Co., Ltd.
    Inventors: Kazuyasu Wada, Yusuke Yano, Tomoya Inoue, Masanori Kyo, Masaki Kawahara
  • Patent number: 7100707
    Abstract: An intact core sample from a soil area, such as a golf green or a ball field, is embedded in molded plastic. The core sample first is obtained, and then adhesively bonded together prior to molding it in clear plastic to preserve the soil core sample in an intact and durable fashion for subsequent visual examination of the composition of the soil core sample.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: September 5, 2006
    Inventor: Harold Howard
  • Patent number: 7093676
    Abstract: A sponge core barrel for use in performing sponge coring and methods of assembling the sponge core barrel, as well as methods of performing sponge coring. The sponge core barrel includes an outer barrel assembly, a core bit secured to a lower end thereof, and an inner barrel assembly disposed therein. The inner barrel assembly may comprise multiple, sponge-lined inner tube sections and may also include a near-bit swivel assembly. The sponge core barrel may include a piston assembly configured to be released by contact with a core sample without imparting high compressive forces to the core. The sponge core barrel may also include a pressure compensation mechanism and, optionally, a thermal compensation mechanism cooperatively configured to maintain the pressure of presaturation fluid. The sponge core barrel may also include a valve assembly enabling the make-up and presaturation of multiple, sections of inner tube to form a single, continuous chamber.
    Type: Grant
    Filed: August 27, 2003
    Date of Patent: August 22, 2006
    Assignee: Baker Hughes Incorporated
    Inventors: Luc Van Puymbroeck, Bob T. Wilson, Holger Stibbe, Hallvard S. Hatloy
  • Patent number: 6719070
    Abstract: A sponge core barrel for use in performing sponge coring and methods of assembling the sponge core barrel, as well as methods of performing sponge coring. The sponge core barrel includes an outer barrel assembly, a core bit secured to a lower end thereof, and an inner barrel assembly disposed therein. The inner barrel assembly may comprise multiple, sponge-lined inner tube sections and may also include a near-bit swivel assembly. The sponge core barrel may include a piston assembly configured to be released by contact with a core sample without imparting high compressive forces to the core. The sponge core barrel may also include a pressure compensation mechanism and, optionally, a thermal compensation mechanism cooperatively configured to maintain the pressure of presaturation fluid. The sponge core barrel may also include a valve assembly enabling the make-up and presaturation of multiple sections of inner tube to form a single, continuous chamber.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: April 13, 2004
    Assignee: Baker Hughes Incorporated
    Inventors: Luc Van Puymbroeck, Bob T. Wilson, Holger Stibbe, Hallvard S. Hatloy
  • Patent number: 6695075
    Abstract: The soil sampler includes a sampling tube having a receiving space for receiving a soil sample, the receiving space being limited in a radial direction by a wall, being open in a distal direction for permitting soil to enter and in a proximal direction being limited by a transverse wall, the transverse wall having ducts for supplying and discharge fluid to the receiving space and a plug for closing the ducts, a free plug or piston being placed in the receiving space closely fitting in there and movable between the transverse wall and the distal area of the sampling tube and the transverse wall and the free plug or piston defining a sealed chamber for fluid when the free plug or piston is situated at a distance from the transverse wall.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: February 24, 2004
    Assignee: Eijkelkamp Agrisearch Equipment B.V.
    Inventor: Arnoldus Emanuel Ruthgerus Beeker
  • Publication number: 20020139583
    Abstract: The invention provides a method of taking a crustal core sample, wherein the crustal core sample is obtained in a state coated with antimicrobial polymeric gel obtained by polymerizing an antimicrobial monomer. It is preferred that antimicrobial monomer is a quaternary ammonium salt compound, and the polymer contains a component derived from the antimicrobial monomer in a proportion of 1 to 10 mol %.
    Type: Application
    Filed: January 18, 2002
    Publication date: October 3, 2002
    Applicant: JAPAN MARINE SCIENCE & TECHNOLOGY CENTER
    Inventors: Noriaki Masui, Shigeru Deguchi, Kaoru Tsujii, Koki Horikoshi
  • Patent number: 6283228
    Abstract: A method for protecting integrity of a core sample during transport from a subterranean formation to the surface comprising: cutting a core sample from the subterranean formation using a drilling fluid; encapsulating the core sample with an encapsulating material that is separate from the drilling fluid and comprises a property which renders the encapsulating material capable of protecting the chemical integrity of the core sample during transport from the subterranean formation to the surface, wherein the property is other than a property selected from the group consisting of a viscosity which increases in response to a decrease in temperature and an ability to solidify in response to a decrease in temperature; and, transporting the encapsulated core sample from the subterranean formation to the surface.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: September 4, 2001
    Assignee: Baker Hughes Incorporated
    Inventors: Pierre Emmanuel Collee, Steven R. Radford, William A. Mallow, Dorothy P. Enright
  • Publication number: 20010000393
    Abstract: The present invention provides a method for protecting integrity of a core sample during transport from a subterranean formation to the surface comprising: cutting a core sample from the subterranean formation using a drilling fluid; encapsulating the core sample with an encapsulating material that is separate from said drilling fluid and comprises a property which renders said encapsulating material capable of protecting said chemical integrity of said core sample during transport from said subterranean formation to said surface, wherein said property is other than a property selected from the group consisting of a viscosity which increases in response to a decrease in temperature and an ability to solidify in response to a decrease in temperature; and, transporting said encapsulated core sample from said subterranean formation to said surface.
    Type: Application
    Filed: December 15, 2000
    Publication date: April 26, 2001
    Inventors: Pierre Emmanuel Collee, Steven R. Radford, William A. Mallow, Dorothy P. Enright
  • Patent number: 6125948
    Abstract: A soil sampling device for collecting samples of soil provides a single use unit with an integrally molded plunger. The soil sampling device includes a cylindrical body having a first chamber and a second chamber, with each chamber comprising a cylindrical wall having a longitudinal axis and an end wall. Optionally, the sampling device may include additional chambers depending on the application. An open end of each chamber defines a mouth which is adapted for inserting into soil. A piston may be positioned within each chamber, and the end walls include a projecting member extending outwardly therefrom which defines a plunger. The end wall includes a reduced cross-section around the projecting member and is adapted to break when a force is applied to the projecting member to thereby permit the plunger enter into the body and thereby push the piston along the longitudinal axis to expel a sample of soil collected in the body.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: October 3, 2000
    Assignee: Soil Core, Inc.
    Inventors: Ramon R. David, Saeid Yazdani
  • Patent number: 6098725
    Abstract: A soil sampling device for collecting samples of soil provides a single use unit with an integrally molded plunger. The soil sampling includes a cylindrical body having first and second ends, with the body comprising a cylindrical wall having a longitudinal axis and an end wall. The cylindrical wall extends between the first and second ends of the body, with the end wall being positioned at the first end of the body. The second end of the body defines a mouth which is adapted for inserting into soil. A piston is positioned in the body, and the end wall includes a projecting member extending outwardly from the body which defines a plunger. The end wall includes reduced cross-section around the projecting member and is adapted to break when a force is applied to the projecting member to thereby permit the plunger enter into the body and thereby push the piston along the longitudinal axis to expel a sample of soil collected in the body.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: August 8, 2000
    Assignee: SoilCore, Inc.
    Inventors: Ramon R. David, Saeid Yazdani
  • Patent number: 5980628
    Abstract: A curable gypsum-based composition for the production cured gypsum matrix. The composition comprises two-components, the first component includes calcined gypsum suspended in water, and a set retarding substance comprising (i) an organic acid containing at least two acid groups selected from the group consisting of carboxyl, sulphate, sulfonate, phosphate and phosphonate, the acid optionally also containing at least one hydroxy group per molecule; and/or (ii) inorganic anions selected from the group consisting of polyphosphate, polyborate and mixtures thereof. The second component comprises a set accelerating substance including water-soluble salts of multivalent metal ions. The water soluble salts in the second component form stable precipitates or complexes with the organic acid in the first component. The second component may also comprise easily soluble salts of ammonium and/or cations from the first group of the periodic table of the elements, which will accelerate the hardening process.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: November 9, 1999
    Assignee: Reslab AS
    Inventors: Odd Hjelmeland, Bjorn Arild Ardo
  • Patent number: 5881825
    Abstract: The present invention provides a method for protecting the integrity of a core sample during transport from a subterranean formation to the surface comprising: cutting a core sample from the subterranean formation using a drilling fluid; encapsulating the core sample with an encapsulating material separate from the drilling fluid, the encapsulating material being capable in the absence of a chemical reaction of protecting core sample integrity during transport from said subterranean formation to said surface; and, transporting the encapsulated core sample from the subterranean formation to the surface.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: March 16, 1999
    Assignee: Baker Hughes Incorporated
    Inventors: Pierre E. Collee, Dorothy P. Enright
  • Patent number: 5568838
    Abstract: A core barrel having an inner tube for coring and, alternately, a center plug assembly or closing the throat of the core bit at the bottom of the assembly for drilling in lieu of coring. The inner tube assembly and plug assembly are disposable and retrievable through the drill string on a wireline using an overshot. The core bit is of a stabilized, preferably anti-whirl, design and may be a low-invasion core bit used in cooperation with a low-invasion coring shoe. A logging tool and data transmission assembly may be incorporated in the plug assembly for logging while drilling.
    Type: Grant
    Filed: September 23, 1994
    Date of Patent: October 29, 1996
    Assignee: Baker Hughes Incorporated
    Inventors: Barry W. Struthers, Pierre E. Collee
  • Patent number: 5560438
    Abstract: The present invention provides a method for maximizing the chemical integrity and, if desired, maintaining the mechanical integrity of a core sample during transport from a subterranean formation to the surface. The method involves cutting and encapsulating the core sample as it enters the core barrel with an encapsulating material that either (a) inherently is capable of protecting the chemical integrity of the core sample, or (b) is capable of increasing in viscosity and/or solidifying in response to natural decreases in temperature to maintain the mechanical integrity and maximize the chemical integrity of the core sample during transport.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: October 1, 1996
    Assignee: Baker Hughes Incorporated
    Inventors: Pierre E. Collee, Dorothy P. Enright
  • Patent number: 5482123
    Abstract: A pressure core barrel including an inner tube containing a non-invasive gel for encapsulating a core sample. An anti-whirl core bit is employed, and the core bit and inner tube pilot shoe are configured and arranged to prevent damage to the core from drilling fluid. A special high viscosity, low spurt loss coring fluid is employed in the coring operation. When the encapsulated, pressurized care sample is brought to the surface, pressure is bled off and the core sample's chemical and mechanical integrity are substantially preserved by the gel.
    Type: Grant
    Filed: October 25, 1994
    Date of Patent: January 9, 1996
    Assignee: Baker Hughes Incorporated
    Inventor: Pierre E. Collee
  • Patent number: 5439065
    Abstract: The invention is an apparatus for rotary drilling of core samples from the wall of a wellbore. The apparatus comprises a coring bit, a motor, a bit box rotatably mounted within a housing adapted to traverse the wellbore, a plunger for extracting the core sample from the bit and discharging the core sample into a storage barrel which has a sponge liner. The sponge liner in the barrel adsorbs liquid hydrocarbons which may be expelled from the porosity in the core sample by gas exsolution.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: August 8, 1995
    Assignee: Western Atlas International, Inc.
    Inventor: Daniel T. Georgi
  • Patent number: 5360074
    Abstract: The present invention provides a method for maintaining the mechanical integrity and for maximizing the chemical integrity of a core sample during transport from a subterranean formation to the surface. The method involves cutting and encapsulating a core sample with an encapsulating material that increases in viscosity or even solidifies, at temperatures slightly lower than those expected downhole, or relatively early in the transport process. A preferred encapsulating material contains at least one polyglycol or chemically modified polyglycol from the oxyalkylene polymer family. The specific formulation of the encapsulating material differs depending upon the expected downhole conditions. For example, the encapsulating material can include a thickener, a nucleating agent, and a water swellable material or another inert material that is capable of sealing the core sample against water.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: November 1, 1994
    Assignee: Baker Hughes, Incorporated
    Inventors: Pierre E. Collee, William A. Mallow, Steven R. Radford
  • Patent number: 4643265
    Abstract: An unconsolidated or loose core is retrieved and retained within a coring tool by wrapping the core with a resilient thin film sleeve. The sleeve is compacted and stored within a concentric cylindrical storage space outside of the core and within the tool. The thin film compacted sleeve is then drawn from the storage space and wrapped about the core. The thin film sleeve is characterized by having a longitudinal length several times greater than the corresponding longitudinal length of the storage space in which it is compacted and stored. More particularly, the thin film sleeve is compactly stored in a cylindrical space defined within an inner tubular mandrel concentric with the core and an outer tubular mandrel concentric with the core. The two mandrels are concentric with each other and spaced apart to form an annular circumferential opening through which the thin film sleeve is disposed and drawn.
    Type: Grant
    Filed: March 4, 1985
    Date of Patent: February 17, 1987
    Assignee: Norton Christensen, Inc.
    Inventors: Noboru Aiura, Yoshio Sawaki
  • Patent number: 4598777
    Abstract: A well coring apparatus (10) includes an outer barrel (12) and an inner barrel (18). The inner barrel (18) is sealed at one end with a sealing member (80) and has a reciprocating piston (70) disposed in the other end thereof. An O-ring (68) is disposed at the receiving end of the inner barrel (18) to provide a seal therefor. Spring members (76) provide a restrictive force to the piston (70). A sponge (50) is disposed around the inner walls of the inner barrel (18) for contacting the core (82). A fluid is disposed in the inner space (78) of the inner barrel (18) and pressurized. Reciprocation upward of the piston (70) causes the fluid to flow therefrom out the receiving end of the inner barrel (18). This flow of fluid washes the sides of the core (82) to prevent drilling mud from caking about the surfaces thereof and preventing proper transfer of fluids contained within the core (82) to the sponge (50).
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: July 8, 1986
    Assignee: Diamond Oil Well Drilling Company
    Inventors: Arthur Park, Bob T. Wilson
  • Patent number: 4587857
    Abstract: A method of mounting and confining poorly and/or unconsolidated core samples for subsequent handling and testing is disclosed. The preferred method comprises the steps of inserting a poorly consolidated core sample into a predetermined length of heat shrinkable tubing. End plugs are inserted at each end of the core sample and within the tubing. Heat is then applied to the heat shrinkable tubing and the tubing shrinks to conform to the outer circumferential surface of the core sample and the end plugs. The tubing is cut off at each end of the poorly consolidated core sample at the line of contact between the poorly consolidated core sample and each end plug. Then the poorly consolidated core sample is seated to attempt to return grains to their in situ grain to grain relationship. Suitable screens are placed against each end of the core sample. Screen caps are then attached to each end of the core sample to provide a constant pressure on the ends of the core sample.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: May 13, 1986
    Assignee: Western Geophysical Company of America
    Inventor: Darrell C. Bush
  • Patent number: 4566545
    Abstract: An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to the coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is under a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter.
    Type: Grant
    Filed: September 29, 1983
    Date of Patent: January 28, 1986
    Assignee: Norton Christensen, Inc.
    Inventors: Arthur L. Story, Michael Filshtinsky
  • Patent number: 4512423
    Abstract: An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to a coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is connected to a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter to prevent binding or jamming.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: April 23, 1985
    Assignee: Christensen, Inc.
    Inventors: James T. Aumann, Michael Filshtinsky
  • Patent number: 4512419
    Abstract: An improved coring device that incorporates a nonrotatable inner barrel disposed within the outer driving structure of the drill string which is coupled to a coring bit. A woven metal mesh sleeve is circumferentially mounted outside the inner barrel and tucked around its lower end. The lower end of the mesh sleeve in the inner barrel is in turn connected to a stripper tube which is pulled upwardly during the coring operation. As the core is cut by the coring bit and enters the inner barrel, the woven metal mesh sleeve is disposed about the core and constricts about the core when pulled upwardly by the stripper tube. The opposing end of the woven metal mesh sleeve is connected to a weight which serves to compress the metal sleeve when outside the inner barrel, thereby increasing its diameter to prevent binding or jamming.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: April 23, 1985
    Assignee: Christensen, Inc.
    Inventors: David S. Rowley, James T. Aumann
  • Patent number: 4449594
    Abstract: The invention provides a method for obtaining a balanced, pressurized core sample from an underpressurized geological reservoir formation. A pressure core sampling well is drilled to a preselected depth and the bottom hole reservoir pressure therein is determined. A computer is programmed to compute predicted bottom hole foam pressures at the bottom of the well produced by a stable foam coring fluid, having a preselected composition, which is introduced into the well under preselected control pressures. Measurements are than made of actual bottom hole foam pressures at the bottom of the well produced by the foam when it is introduced into the well at preselected control pressures and under core sample drilling conditions. A comparison is made between the measured bottom hole foam pressures and the computer predicted bottom hole foam pressures to derive a correlation function and to select a correlated core pressure.
    Type: Grant
    Filed: July 30, 1982
    Date of Patent: May 22, 1984
    Assignee: Allied Corporation
    Inventor: Ronald L. Sparks
  • Patent number: 4356872
    Abstract: A core barrel flushing device and method is disclosed particularly for flushing drilling fluid, mud and other undesirable material from a pressure core barrel downhole at existing conditions and pressure.The flushing device (F) comprises an outer barrel attachable to the drill string and core barrel (10), and an inner barrel (90) within the outer barrel (70). A sealed chamber (C) within the outer barrel (70) contains a piston (114) and flushing medium (M) displacable from the chamber (C) and into the core barrel during forceful displacement of the piston following actuation of the flushing device.Actuation of the flushing device is initiated by means (B) passed down the drill string into engagement with actuating means (94) allowing displacement of the piston and flushing medium from the chamber into the core barrel.Tripping means (112) are also disclosed responsive to the final movement of the piston to actuate, and seal the flushed pressure core barrel (10) and core sample (51) therein downhole.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: November 2, 1982
    Assignee: Christensen, Inc.
    Inventor: Craig R. Hyland
  • Patent number: 4156469
    Abstract: A core barrel having a hollow cutting ring is placed within a hollow drill and connected to a coupling which permits the core barrel to remain stationary while the bit rotates and also produces pressure to force the sharp edge of the cutting ring into the earth formation, the diameter of the cutting edge and inside of the cutting ring being slightly less than the internal diameter of the core barrel. A holder for a resilient sleeve, such as woven of nylon and is bunched onto the holder with the closed end of the sleeve across the open top of the holder, moves upwardly around the core as the core barrel moves downwardly and retains the core, particularly when from a soft formation or loose unconsolidated material, in the same relative position and shape as when cut. The inside diameter of the holder is intermediate that of the cutting ring and the core barrel. An adjustment means determines the axial spacing between the cutting edge of the core barrel cutting ring and the lower edge of the drill bit or teeth.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: May 29, 1979
    Inventor: John G. Laskey
  • Patent number: 4071099
    Abstract: A method of and apparatus for stabilizing oil well cores taken within rubber sleeve core barrels is provided wherein an unconsolidated and friable columnar mass of earth may be handled without altering the characteristics of its physical structure. A housing is therein provided for receiving a conventional rubber sleeved core sample from a vertically suspended core barrel inside a drilling rig. The housing is adapted for the positioning of the ensleeved core therein and the circulation therearound of a subfreezing mass for the freezing and solidification of the core fluids contained therethrough. Freezing of the core fluids immobilizes rock grains and the like, stabilizing the core sample for handling and second stage stabilization through rigid encasement in a casting medium. The casted core may then be handled in a conventional manner during transportation for subsequent analysis in its original condition.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: January 31, 1978
    Assignee: Sun Oil Company
    Inventor: Wilber M. Hensel, Jr.
  • Patent number: 4055051
    Abstract: A combined drill bit and roof bolt and a method for forming a bore hole in a mine roof and for reinforcing same. The drill bit and roof bolt form the same structural element which preferably comprises an elongate hollow tube. On one end of the tube is formed a multi-bladed bit. The diameter of the hole cut by the blades is somewhat larger than the diameter of the elongate tube. Formed intermediate the blades on the bit head are a plurality of apertures. The apertures perform the dual function of providing an exit passageway for rock chips as the drilling proceeds, as well as providing a means through which a quick-setting adhesive resin is extruded from inside the hollow bolt to the newly drilled annular hole extending thereabout. The extrusion is accomplished by means of a pig element forced up the tube.
    Type: Grant
    Filed: January 8, 1976
    Date of Patent: October 25, 1977
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventor: James Lee Finney
  • Patent number: D310444
    Type: Grant
    Filed: January 30, 1987
    Date of Patent: September 11, 1990
    Inventor: Finn Utsola