Patents Examined by Michael Starinsky
  • Patent number: 4527632
    Abstract: A system according to the invention includes a working well head 1 whose producing head is connected by a rigid or flexible pipe to at least one underwater degasifier tank. A pump 4 for lifting the product from the well or wells 1 is regulated by a control valve which responds to the discharge flow of liquids and/or variations in weight and/or buoyancy of the degasifier tank 3. A valve for regulating the flow of product from the well 1 is controlled by a second control means. The second control means may modulate the gas sealing pressure by pinching a stream of gas at some point in the piping in response to the relative buoyancy of said underwater degasification tank. Combinations of the various systems disclosed in the invention make it possible to increase the recovery of desired product fluids from an underwater deposit.
    Type: Grant
    Filed: June 7, 1983
    Date of Patent: July 9, 1985
    Inventor: Geard Chaudot
  • Patent number: 4527631
    Abstract: There are disclosed two embodiments of a subsurface safety valve having operating means which is responsive to the supply of control fluid from a remote source for holding a closure member in open position and which is retrievable separately from the closure member, so that with the bore of the mandrel above and below the closure member fluidly disconnected, the closure member automatically closes so as to close in the well when the operating means is so retrieved.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: July 9, 1985
    Assignee: AVA International Corporation
    Inventor: Gonzalo Vazquez
  • Patent number: 4527643
    Abstract: A cutting element for drilling holes is disclosed which consists of five cutting edges which are comprised of polycrystalline diamond or the like mounted to a central carbide substrate or similar hard material held by a rotatable shaft which can be inserted into a drilling machine. The polycrystalline material is unsupported with respect to torsional forces exerted upon it during drilling. An advantage of this cutting member is its ability to cut straight new holes in hard or abrasive materials for substantially longer periods of time than presently available rotary drills.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: July 9, 1985
    Assignee: Megadiamond Industries Inc.
    Inventors: M. Duane Horton, L. Brent Horton
  • Patent number: 4516641
    Abstract: An earth boring bit having a cantilevered bearing shaft and a compensator system to equalize the pressure of the lubricant with the hydrostatic pressure of the drilling fluid surrounding the bit. A rigid face seal assembly, positioned between the cutter and bearing shaft of the bit, moves axially in response to, and to compensate for, dynamic pressure changes in the lubricant adjacent the seal. This is accomplished by the positioning and sizing of resilient energizer rings in relationship to the geometries of the mating grooves between the cutter and shaft and the rigid sealing rings of the face seal assembly.
    Type: Grant
    Filed: October 17, 1983
    Date of Patent: May 14, 1985
    Assignee: Hughes Tool Company-USA
    Inventor: Bruce H. Burr
  • Patent number: 4515226
    Abstract: Teeth disposed on the bit face of a rotating bit are, angularly oriented on the sloping surface of the bit face such that a vertical loading force which is applied to each tooth vectorially sums with a wedging force exerted by the rock formation on each tooth to create a resultant force applied to the diamond cutting element included within the tooth. The angular orientation of the tooth is chosen such that the resultant force is applied to the diamond cutting element in a direction which minimizes shear stress on the element. For example, in the case where the diamond cutting element is an equilateral triangular prismatic element tangentially set on the bit face with one apical edge defined by two adjacent triangular sides outermost on the tooth, the orientation or inclination of the tooth with respect to the vertical loading force and wedge force is such that the resulting force lies near or on the bisector of the dihedral angle formed by the apical edge.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: May 7, 1985
    Assignee: Norton Christensen, Inc.
    Inventors: Hans-Eckhard Mengel, Hermann Munzel
  • Patent number: 4515230
    Abstract: A drill bit for use in mining, and in particular in rotative and percussion drilling action which includes a generally cylindrical body with a driving shank at one end and a transverse cutting insert at the other end. The body is hollow to conduct a suction force to the drilling area and side ports are formed in the body connected to the hollow center to draw in dust, chips and cuttings resulting from the drilling action. The shape and extent of the side ports is disclosed as 1/4 to 1/3 of the axial length of the body of the bit and circumferentially significantly increased with a shape which provides circumferential access to the ports as well as radial.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: May 7, 1985
    Assignee: Fansteel Inc.
    Inventors: Thomas C. Means, Kenneth C. Emmerich
  • Patent number: 4515227
    Abstract: The flow of drilling fluid across the face of a rotating bit can be improved by disposition of jet nozzles in the middle of pads defined on the rotating bit rather than in or directly communicating with water courses in the bit. Drilling fluid is therefore ejected by the nozzle and flows in a plurality of directions across the face of the pad with a maximal velocity. Drilling fluid arriving in the proximity of the nozzle and provided from other sources in the bit is thus entrained within the drilling fluid which is ejected from the nozzle. This serves then to suction drilling fluid from these other sources. In particular, in a rotating bit having a pilot bit and main reamer bit, drilling fluid supplied to the pilot bit is directed toward a pilot bit junk slot in the immediate proximity of a nozzle disposed in the middle of a reamer lobe. Drilling fluid flowing down the pilot bit junk slot is entrained within drilling fluid ejected by the reamer nozzle.
    Type: Grant
    Filed: April 27, 1983
    Date of Patent: May 7, 1985
    Assignee: Christensen, Inc.
    Inventor: Jerry Cerkovnik
  • 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: 4512401
    Abstract: A method for forming an annulus around the outer wall of a well casing to provide a good impervious seal around such casing. A wiper of a flexible soft material which mates with the inner bore of the casing is first placed in the casing at the top thereof. Cement is pumped into the casing on top of the wiper, forcing it down to the bottom of the casing, the wiper carrying mud and other foreign material with it and out of the casing. Sonic energy at a relatively low frequency (typically 15-200 Hz) is applied to the casing. A second wiper which mates with the inner walls of the casing is installed therein, this second wiper being of a rigid, relatively inflexible material.
    Type: Grant
    Filed: May 27, 1982
    Date of Patent: April 23, 1985
    Inventor: Albert G. Bodine
  • 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: 4511008
    Abstract: Structure for permanently retaining a rolling cutter on a journal pin of a rotary cutter earth boring bit is shown. The structure is defined by opposed, axially aligned, circumferential grooves formed in the mating bearing surfaces of the pin and the assembled cutter. The cutter groove is a single width throughout whereas the pin groove defines a double width for an arcuate extent thereof on its unloaded side. A split snap ring is compressed within the pin groove, with the ends of the ring axially overlapping in the double width portion so that the ring does not extend above the surface of the pin. Upon alignment of the grooves, during assembly of the cutter on the pin, the ring snaps into the cutter groove with the ends in abutting relationship and extends radially into the pin groove to retain the cutter on the pin.
    Type: Grant
    Filed: January 6, 1984
    Date of Patent: April 16, 1985
    Assignee: Dresser Industries, Inc.
    Inventor: David T. Brunson
  • Patent number: 4509604
    Abstract: In accordance with an illustrative embodiment of the present invention, a well perforating and testing system includes packer and test valve means for respectively isolating a well bore interval and controlling flow of well fluids therefrom, a perforating gun connected below the packer means, and firing means responsive to a greater pressure in the well annulus above the packer means than in said isolated interval for actuating the perforating gun so that the casing can be perforated at underbalanced pressure conditions.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: April 9, 1985
    Assignee: Schlumberger Technology Corporation
    Inventor: James M. Upchurch
  • Patent number: 4509594
    Abstract: A mudline casing hanger assembly wherein the collet (10) is retained on the hanger body (12) during running by tensile coupons (26). The lower portion (32) of the coupon is retained in slot (24) with collet slots (22) and hanger flowby slots (48) being aligned.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: April 9, 1985
    Assignee: Vetco Offshore, Inc.
    Inventors: Lionel J. Milberger, Charles D. Bridges
  • Patent number: 4508173
    Abstract: The valve includes a tubular housing member that is connected in a string of a tubing that extends into an oil or gas well. The upper end of the tubular housing member is rotatable and is connected through actuators to a valve member that is pivotally supported in the tubular housing member. Rotation of the upper end of the tubular housing causes the actuators to move linearly and in opposite directions simultaneously pivot the valve member between open and closed positions. Pressure responsive means bias the seat toward the valve to maintain a fluid tight seal regardless of the direction of differential in pressure existing across the valve.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: April 2, 1985
    Assignee: Dresser Industries, Inc.
    Inventor: Norman W. Read
  • Patent number: 4508174
    Abstract: A downhole tool includes a pipe string portion which is disposed in a pipe string of a well and a probe portion which can be lowered by wireline or other suitable means into the well for engagement with the pipe string portion. The pipe string portion includes a sliding sleeve valve which is biased in a closed, or unactuated position, by a spring contained within the pipe string portion. The probe portion includes a connector mechanism which engages lugs of the pipe string portion for imparting an opposing force to the sliding sleeve valve which overcomes the biasing force of the spring so that the valve can be opened to permit reservoir pressure to enter a cavity of the probe portion containing a sensor mechanism. The coupling and decoupling of the connector mechanism with the lugs is effected through two downward and two upward movements of the probe portion.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: April 2, 1985
    Assignee: Halliburton Company
    Inventors: Neal G. Skinner, David S. Wesson
  • Patent number: 4506729
    Abstract: A side-entry sub for use in conjunction with wireline cable. The sub has a cable entry port provided with a self-closing valve for sealing the port upon withdrawal of the cable. In one embodiment, the self-closing valve is characterized by a housing member supporting a closure disc which is integrally molded with a resiliently deflectable support member having an elastic memory which biases the valve in the closed position. In an alternate embodiment, the self-closing valve comprises a ball valve, biased in the closed position by magnetic or spring means, and having a passageway through which the cable may pass. When the cable is inserted through the passageway, the ball valve is held in the valve open position. When the cable is removed from the passageway, the ball valve automatically closes.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: March 26, 1985
    Assignees: Exxon Production Research Co., Gearhart Industries, Inc.
    Inventors: Albert P. Davis, Jr., Orien M. Knight, John W. Stoltz
  • Patent number: 4506731
    Abstract: The present invention comprises an apparatus for placement and retrieval of gauges employed to measure temperature, pressure and other parameters in a well bore. The apparatus comprises a gauge receptacle means incorporated in a pipe string including a substantially tubular outer housing having a substantially tubular inner housing substantially coaxially therein, the inner housing being supported in the outer housing by a plurality of support rings having longitudinally extending apertures therethrough. The inner housing has a landing nipple profile cut therein, whereby a locking mandrel having a gauge holder secured thereto may be run into the pipe string on a wireline, and locked into the inner housing after which the wireline may be retracted. The locking mandrel may also be subsequently unlocked and retrieved with the gauge holder by wireline.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: March 26, 1985
    Assignee: Halliburton Company
    Inventor: Neal G. Skinner
  • Patent number: 4505342
    Abstract: A full bore drag type well drilling bit including a bit body comprised of a generally non-frangible metallic material. The bit body has an operating end face defined by said metallic material to include a plurality of upsets each having a leading edge and at least one recess extending through such leading edge into said metallic material. The end face further includes a plurality of flow paths, each of the leading edges of the upset having one such flow path extending therealong and inset therefrom. At least some of the upsets have a plurality of such recesses spaced therealong. A plurality of circulation ports open through the end face of the bit body, the number of circulation ports being less than the number of flow paths extending along the leading edges of the upsets, and at least some of the ports communicate with more than one such path. The bit further comprises a plurality of cutting structures carried by the bit body.
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: March 19, 1985
    Assignee: NL Industries, Inc.
    Inventors: John D. Barr, John M. Fuller
  • Patent number: 4505331
    Abstract: There is disclosed a side pocket mandrel having upper and lower sections which are adapted to be connected to a well tubing string and which have lower and upper ends, respectively, which are coaxial with one another but with respect to the axes of their upper and lower ends, and an intermediate section adapted to be threadedly connected at its opposite ends to the lower and upper ends, respectively, of the upper and lower sections. The intermediate section is a one-piece body having a first bore formed therein which is substantially axially aligned with the lower and upper ends of the upper and lower sections, respectively, and a second bore formed therein which is parallel to the first bore and open on at least one end to provide a pocket into which a flow-controlling tool may be inserted or from which a flow-controlling tool may be removed.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: March 19, 1985
    Assignee: AVA International Corporation
    Inventor: Neil H. Akkerman
  • Patent number: 4503911
    Abstract: A method for the recovery of oil from a subterranean, viscous oil-containing formation by injecting a predetermined amount of steam into the formation via a well completed in the middle portion of the oil-containing formation for a distance between 40 to 60 percent of the vertical thickness of the oil-containing formation, terminating injection of steam and producing fluids including oil through the same well used for the injection of steam. The steps of injecting steam and producing oil can be repeated for a plurality of cycles. Injecting steam through a selected completion interval in the middle of the formation induces maximum visbreaking of the viscous oil within the formation by controlling heat losses to the over and under strata.
    Type: Grant
    Filed: June 16, 1983
    Date of Patent: March 12, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Kathy J. Hartman, Winston R. Shu