Patents by Inventor Stephen J. Walker

Stephen J. Walker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10301886
    Abstract: A riser assembly is disclosed comprising: a main tube; two flanges coupled to the main tube, each flange comprising: a central lumen configured to be in fluid communication with the main tube; at least one choke/kill hole configured to receive a choke/kill line; at least one booster hole configured to receive a booster line; and a plurality of bolt holes, each bolt hole comprising a tapered portion and a dowel slot, where each bolt hole is configured to receive a nut, a bolt, and a dowel. In certain embodiments, riser strings comprising at least two riser assemblies coupled to each other are disclosed.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: May 28, 2019
    Assignee: AMERIFORGE GROUP INC.
    Inventors: Stephen J. Walker, Gilbert Nance, Randy Arthion
  • Patent number: 10087687
    Abstract: A seal sub system for the connection of fluid lines, including first and second fluid lines, each including a terminal end with an inner diameter. A seal sub includes an inner channel and first and second pin ends, one pin end removably insertable in the fluid line terminal end with the other pin end extending from the fluid line terminal end. A seal forms a seal between the seal sub and the inner diameter of the first fluid line terminal end. The extending pin end is configured to be inserted into the terminal end of the second fluid line to establish a sealed fluid connection between the first and second fluid lines.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: October 2, 2018
    Assignee: Cameron International Corporation
    Inventors: David L. Gilmore, Stephen J. Walker
  • Publication number: 20160032662
    Abstract: A riser assembly is disclosed comprising: a main tube; two flanges coupled to the main tube, each flange comprising: central lumen configured to be in fluid communication with the main tube; at least one choke/kill hole configured to receive a choke/kill line; at least one booster hole configured to receive a booster line; and a plurality of bolt holes, each bolt hole comprising a tapered portion and a dowel slot, where each bolt hole is configured to receive a nut, a bolt, and a dowel. In certain embodiments, riser strings comprising at least two riser assemblies coupled to each other are disclosed.
    Type: Application
    Filed: March 12, 2014
    Publication date: February 4, 2016
    Inventors: Stephen J. Walker, Gilbert Nance, Randy Arthion
  • Patent number: 8657013
    Abstract: A riser system for coupling a surface platform to a wellhead. The riser system includes a main tube, flanges and one or more tie rods. The main tube forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The tie rods are coupled to and extend between the flanges.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: February 25, 2014
    Assignee: Cameron International Corporation
    Inventors: John E. Kotrla, Stephen J. Walker, William F. Puccio
  • Publication number: 20130255956
    Abstract: A seal sub system for the connection of fluid lines, including first and second fluid lines, each including a terminal end with an inner diameter. A seal sub includes an inner channel and first and second pin ends, one pin end removably insertable in the fluid line terminal end with the other pin end extending from the fluid line terminal end. A seal forms a seal between the seal sub and the inner diameter of the first fluid line terminal end. The extending pin end is configured to be inserted into the terminal end of the second fluid line to establish a sealed fluid connection between the first and second fluid lines.
    Type: Application
    Filed: April 2, 2012
    Publication date: October 3, 2013
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: David L. Gilmore, Stephen J. Walker
  • Publication number: 20130043036
    Abstract: A riser system for coupling a surface platform to a wellhead. The riser system includes a main tube, flanges and one or more tie rods. The main tube forms an annulus for fluid flow between the wellhead and the platform. A flange extends radially from each end of the main tube. The tie rods are coupled to and extend between the flanges.
    Type: Application
    Filed: August 19, 2011
    Publication date: February 21, 2013
    Applicant: CAMERON INTERNATIONAL CORPORATION
    Inventors: John E. Kotrla, Stephen J. Walker, William F. PUCCIO
  • Patent number: 7377323
    Abstract: A blowout preventer stack landing assist tool and landing tool adapter joint for use with a standard telescoping joint used in oil and gas drilling operations that allows lifting and moving of the riser string and blowout preventer stack without requiring disconnection of the telescoping joint, tensioning lines and associated piping from the riser string connection.
    Type: Grant
    Filed: January 20, 2005
    Date of Patent: May 27, 2008
    Assignee: Cameron International Corporation
    Inventors: Stephen J. Walker, Lan T. Hiscox
  • Patent number: 6176663
    Abstract: An apparatus for reducing the bending stress imparted to threaded fasteners in flanged connections is disclosed. The apparatus includes a stress reducing washer positioned between the head of the threaded fastener and a counterbore in the backface of the flange. In a first embodiment, the stress reducing washer uses a tapered upper surface oriented with respect to the flange to compensate for flange deflection as the threaded fastener is tightened to a predetermined torque value. Second and third embodiments utilizing spherical and cylindrical surfaces are also shown. A fourth embodiment eliminates the need for the stress reducing washer and machines the tapered surface in the backface of the flange.
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: January 23, 2001
    Assignee: Cooper Cameron Corporation
    Inventors: Lan T. Nguyen, Stephen J. Walker
  • Patent number: 5637356
    Abstract: Polyesters are formed from diols and dibasic carboxylic acids at an OH/COOH ratio to provide --OH termination, and then end-capped with tribasic carboxylic acids. A major portion of the dibasic carboxylic acids used to form the polyesters have the formula: ##STR1## where x=8-32, y=0-8, x+y=8-32. The polyesters are used as support resins for forming acrylic resin emulsions. The polyester/acrylic acid emulsions are useful, for example, as textile size.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: June 10, 1997
    Assignee: Morton International, Inc.
    Inventors: Ronald J. Kerr, John P. Petrovich, Stephen J. Walker, J. Alvin Binkley
  • Patent number: 5314024
    Abstract: An angular and radial self-aligning coupling includes a first support block having a flow bore therethrough with an enlarged counterbore around one outlet of the flow bore. The enlarged counterbore forms a convex annular surface. A spherical seal plate also having a flow bore therethrough includes a concave surface on one side which matingly engages the convex annular surface of the support block. The spherical seal plate also has an annular bearing surface on its other side which engages a bearing face on a radial seal plate. The radial seal plate includes a stab counterbore on its other side. A second support block includes a flow bore therethrough and includes a piston which may be hydraulically actuated to an extended position. Upon actuation of the piston, the piston enters the stab counterbore and the radial seal plate and spherical seal plate automatically adjust for any radial or angular misalignment to allow the piston to stab within the stab counterbore.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: May 24, 1994
    Assignee: Cooper Industries, Inc.
    Inventors: Tony A. Rodgers, Stephen J. Walker
  • Patent number: 4557508
    Abstract: An improved tubular connector including a first tubular member, a second tubular member, said members having external grooves near their ends which are to be joined, a plurality of latching segments having internal projections adapted to engage in the grooves of both said first tubular member and said second tubular member and also having external tapered surfaces, an actuator ring having an internal tapered surface matching and engaging the external tapered surfaces of said latching segments, movement of the actuator ring in one direction wedging said segments into tight latching engagement with said grooves on said tubular members and movement in the other direction releasing said segments to allow them to disengage from said grooves on said tubular members, an external retaining groove in one of said tubular members, and a split ring positioned in said external retaining groove and engaging said actuator ring to exert a force thereon which retains it in each of its extreme positions.
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: December 10, 1985
    Assignee: Cameron Iron Works, Inc.
    Inventor: Stephen J. Walker
  • Patent number: 4209891
    Abstract: Apparatus for positioning a first part with respect to a second part is characterized by a cylindrical guide respectively attachable to each part, a helical surface being disposed on each guide, each helical surface including a right hand half and a left hand half. A piston-cylinder is disposed on the second part, the piston being extendable to engage the guide on the first part to axially align the guides. After alignment, the piston is retractable to bring the helical surfaces into contact to generate a torque and align the parts. In another embodiment, the guide for the second part is formed on the piston while the guide on the first part has an axial alignment member projecting therefrom to engage the guide on the second part to align the guides. Once aligned, the helical surfaces contact each other with the piston extended. The contact between the helical surfaces causes the rotational alignment of the second part with respect to the first part.
    Type: Grant
    Filed: July 17, 1978
    Date of Patent: July 1, 1980
    Assignee: NL Industries, Inc.
    Inventors: Raymond K. Lamb, Richard E. Weathers, Lacey C. Coffey, Stephen J. Walker
  • Patent number: 4159637
    Abstract: A test tool and a method of testing is disclosed for testing for leaks in apparatus having a bore and a landing surface, such as blowout preventers, wellheads, casing hangers, and the like. The test tool is connected to pipe having a passage therethrough, which has a landing surface for landing on the landing surface of the bore, bypass passages automatically closed on landing and during testing, packing means for effecting a seal in the bore, a pressure relief valve and hydraulic passages communicating with the passage in the pipe, the packing means, and the relief valve which opens at a predetermined pressure. The packing is set either hydraulically, mechanically or by a combination thereof. The packing is set hydraulically by a piston and cylinder which are activated by hydraulic setting pressure in the passages and then hydraulic test pressure is released by the relief valve to the space above the packing for testing the apparatus.
    Type: Grant
    Filed: December 5, 1977
    Date of Patent: July 3, 1979
    Assignee: Baylor College of Medicine
    Inventors: Raymond K. Lamb, Stephen J. Walker