Well Caps Or Casing Heads Patents (Class 166/75.13)
  • Patent number: 8333237
    Abstract: A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: December 18, 2012
    Assignee: Seaboard International Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 8302678
    Abstract: An apparatus operatively coupled to a well having a production casing positioned therein, the apparatus including a first device having and internal bore, a second device having an internal bore, and a fracture isolation sleeve disposed at least partially within the internal bores of the first and second devices, wherein the fracture isolation sleeve has an internal diameter that is greater than or equal to an internal diameter of the production casing.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: November 6, 2012
    Assignee: FMC Technologies Inc.
    Inventors: Gerald Brian Swagerty, Brandon Matthew Cain, Huy LeQuang, Bill Albright
  • Patent number: 8297361
    Abstract: An oil recovery system recovers oil released at the bed of a body of water. The system includes a fluid collector assembly positionable proximate to the bed of the body of water. The collector assembly has an open lower end to receive fluid and has an upper end coupled to a lowermost fluid transfer tube. Fluid transfer tubes are interconnected in a string between the lowermost fluid transfer tube and a vessel positioned to receive fluid transferred through the fluid transfer tube. A guide cable is anchored at the bed of the body of water to guide the fluid collector assembly and the fluid transfer tubes to the bed. A lift cable selectively lowers the fluid collector assembly and the fluid transfer tubes to the bed. Fluid entering the collector assembly rises to the water surface via the transfer tubes.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: October 30, 2012
    Inventor: Warren N. Root
  • Publication number: 20120261133
    Abstract: An apparatus for blocking or capping a pipe end is disclosed. The apparatus includes a tubular body defining a central cavity having an inlet, an outlet, and an axis. The apparatus also includes a plurality of conical blocker rings mounted to an inner diameter surface of the tubular body within the cavity, at least some of the blocker rings being rigid and some of the blocker rings being compliant. The blocker rings are adapted to seal to a pipe end inserted into the central cavity. The rigid blocker rings have an outer diameter joined to an inner diameter of the central cavity, and the compliant blocking rings have an inner diameter smaller than an inner diameter of the rigid blocker rings and are adapted to seal around an exterior of the pipe when inserted from the inlet.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Applicant: VETCO GRAY INC.
    Inventor: Pawel Karol Stezycki
  • Publication number: 20120247754
    Abstract: A stuffing box assembly (4) comprising a primary housing (8) having a longitudinally oriented hollow bore (11) extending therethrough, a hanger assembly (9) within the longitudinally oriented hollow bore of the primary housing, and drive means (10) received within the hollow bore of the hanger assembly. The hanger assembly has a longitudinally oriented hollow bore extending therethrough. The drive means has means (15) to releasably secure the drive means to a pump rod such that the pump rod is hung from and supported within the primary housing by the hanger assembly. Rotation of the drive means causes a corresponding rotation of the pump rod. The hanger assembly includes one or more seals (17) to contain well fluids and to help prevent the flow of well fluids into the bore of the hanger assembly.
    Type: Application
    Filed: July 22, 2010
    Publication date: October 4, 2012
    Inventors: Andrew Wright, James Bentley
  • Patent number: 8272433
    Abstract: A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: September 25, 2012
    Assignee: Seaboard International Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 8235125
    Abstract: A technique is provided for terminating tubing. In the technique, a tubing termination assembly is used to terminate control line tubing from a downhole safety valve at a wellhead component. The tubing termination assembly utilizes a seal ring to form a seal around control line tubing extending from a port through a wellhead component. A seating surface is provided in the seal ring, rather than in the wellhead component, to which a seal member is abutted to form the seal with the control line tubing. The seal ring also comprises a threaded portion to enable a threaded member to urge the seal member against the seating surface.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: August 7, 2012
    Assignee: Vetco Gray Inc.
    Inventor: Eugene A. Borak, Jr.
  • Patent number: 8230928
    Abstract: An internal tree cap having a running configuration and a latched configuration to be selectively secured to a tree spool. The tree cap may include an inner sleeve movable between upper and lower positions. The movement of the inner sleeve to the lower position may simultaneously engage a locking profile within the tree spool and energize a sealing element around the exterior of the tree cap. The tree cap may be a low profile tree cap that is flush with the top of the tree spool when installed. The tree cap may provide a collateral beneficial locking means to secure a tubing hanger within the tree spool. A lower housing may be attached to the tree cap to seal on the exterior of the upper neck of the tubing hanger. The tree cap may include a profile to accept a wireline plug.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: July 31, 2012
    Assignee: Aker Subsea Inc.
    Inventors: Glen H. Cuiper, Paulo Cezar Silva Paulo, André Smith
  • Patent number: 8157005
    Abstract: A casing mandrel for an independent screwed wellhead includes a seal bore for receiving a fixed-point packoff connected to a high-pressure mandrel of a pressure isolation tool, and a pin thread adapted for engagement with a box thread of a tubing head supported by the casing mandrel.
    Type: Grant
    Filed: April 5, 2011
    Date of Patent: April 17, 2012
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: Bob McGuire
  • Patent number: 8146670
    Abstract: A wellhead seal assembly forms a metal-to-metal seal between inner and outer wellhead members. A metal seal ring has inner and outer walls separated by a slot. A lock ring has grooves for locking the inner wellhead member to the outer wellhead member during installation. An energizing ring has a C-ring captured on its inner surface. When the energizing ring is moved further into the slot, the C-ring is forced from its pocket and engages the surface of the inner wellhead member, locking the seal assembly to the inner wellhead member.
    Type: Grant
    Filed: May 14, 2009
    Date of Patent: April 3, 2012
    Assignee: Vetco Gray Inc.
    Inventors: Steven C. Ellis, Javier Garcia, Jr., Rick C. Hunter, John E. Nelson
  • Patent number: 8113291
    Abstract: A leak detection method uses a comparator to compare fluid values in and from the latch assembly of the latch system for an oilfield device and/or in and from the bearing assembly of a rotating control head.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: February 14, 2012
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Thomas F. Bailey, James W. Chambers
  • Patent number: 8087465
    Abstract: A locking tree cap for use on a subsea tree. The tree cap may be installed and retrieved using a remote operated vehicle. The tree cap may include deflectable collet fingers that lock the tree cap to a tree spool. The deflectable collet fingers may be adapted, such as with enlarged heads, to extend into recesses of the tree spool when the tree cap has been landed on the tree spool. The tree cap may be locked onto a tree spool before energizing sealing members within the bores of the subsea tree, thereby protecting the sealing members from damage during the installation of the tree cap onto the tree spool. The tree cap may include soft landing means such as a plastic cap, on the end of stabs to protect the sealing members as the tree cap is landed. The tree cap may include a secondary locking mechanism used to further secure the tree cap to the tree spool.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: January 3, 2012
    Assignee: Aker Subsea Inc.
    Inventors: Alan Huang, Venu Kopparthi, Saul dos Santos Filho
  • Patent number: 8074722
    Abstract: A technique for securing a subsea well that has had some of its components damaged as a result of a storm or other catastrophic event. The techniques utilizes a casing head assembly that may secured to the casing of the damaged well by tightening a plurality of set screws to drive slips into the casing. The casing head assembly may also comprise a tubing hanger. Tubing head set screws may then be tightened to activate the tubing hanger to secure the production tubing to the casing head. The casing head assembly may also comprise a latch-lock connector that may be secured to the casing head by stabbing the latch-lock connector into the casing head and rotating the connector approximately one-quarter turn. A corrosion cap may then be secured to the latch-lock connector to cover the end of the production tubing.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: December 13, 2011
    Assignee: Vetco Gray Inc.
    Inventors: John M. Murphy, Jr., Ronald C. Gilbert, Sigifredo Alvarado
  • Patent number: 8016030
    Abstract: An apparatus and method for containing oil from a deep water (greater than 1,000 meters) oil well is disclosed herein. The apparatus has an anchor section, a plurality of riser sections, an upper section and a flow tube. A pressure within the apparatus is equal to a pressure outside of the apparatus to prevent collapse of the apparatus, and to prevent crystallization. Oil is suctioned from the interior of the apparatus through the flow tube to a surface of the ocean.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: September 13, 2011
    Assignee: triumUSA, Inc.
    Inventor: Jose Jorge Prado Garcia
  • Patent number: 7987903
    Abstract: An apparatus and method for containing oil from a deep water (greater than 1,000 meters) oil well is disclosed herein. The apparatus has an anchor section, a plurality of riser sections, an upper section and a flow tube. A pressure within the apparatus is equal to a pressure outside of the apparatus to prevent collapse of the apparatus, and to prevent crystallization. Oil is suctioned from the interior of the apparatus through the flow tube to a surface of the ocean.
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: August 2, 2011
    Assignee: triumUSA Inc.
    Inventor: Jose Jorge Prado Garcia
  • Patent number: 7963320
    Abstract: A cover assembly for use on a wide variety of tubular members comprises a base member, a pivoting member, a plurality of fingers extending from both the base member and the pivoting member and pivot means to pivotally join said pivoting member to said base member. Preferably the cover assembly is pivotable between an open configuration and a closed configuration, wherein said open configuration accepts a first bolt pattern configuration and wherein said closed configuration accepts a second bolt pattern configuration. More preferably, the cover assembly further comprises a ring groove guide. Even more preferably, the cover assembly further comprises a tubular engagement member.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: June 21, 2011
    Inventor: Corey Schnepf
  • Patent number: 7950466
    Abstract: A wellhead system, connector, and method of assembling a wellhead system. The connector includes a member having a set of left-hand threads and a set of right-hand threads on its interior surface. The connector provides a quick connection to threads on wellhead components such as a tubing head and a casing head.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: May 31, 2011
    Assignee: Stream-Flo Industries Ltd.
    Inventors: Doyle W. Rodgers, Randy P. Nichols, Henry Lang
  • Patent number: 7921923
    Abstract: A casing mandrel for an independent screwed wellhead includes a seal bore for receiving a fixed-point packoff connected to a high-pressure mandrel of a pressure isolation tool, and a pin thread adapted for engagement with a box thread of a tubing head supported by the casing mandrel.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: April 12, 2011
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: Bob McGuire
  • Patent number: 7909103
    Abstract: A subsea wellhead assembly has a tubing hanger landed in a wellhead housing. A spool lands on the wellhead housing and has a bore with a laterally extending production flow outlet. A tree cap having an axially extending flow passage and a laterally extending production flow outlet lands within the bore of the spool. Upper and lower seals on the tree cap seal between the tree cap and the bore of the spool above and below the production flow outlet of the spool. An isolation tube on a lower end of the tree cap sealingly engages the production flow passage of the tubing hanger. The tree cap may be ran with the spool as an assembly and retrieved from the spool for workover operations.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: March 22, 2011
    Assignee: VetcoGray Inc.
    Inventor: Stephen P. Fenton
  • Patent number: 7900697
    Abstract: An apparatus operatively coupled to a well having a production casing positioned therein, the apparatus including a first device having and internal bore, a second device having an internal bore, and a fracture isolation sleeve disposed at least partially within the internal bores of the first and second devices, wherein the fracture isolation sleeve has an internal diameter that is greater than or equal to an internal diameter of the production casing.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: March 8, 2011
    Assignee: FMC Technologies, Inc.
    Inventors: Gerald Brian Swagerty, Brandon Matthew Cain, Huy LeQuang, Bill Albright
  • Publication number: 20110048735
    Abstract: A well cap rod hanger for securing a well head having an upper portion adapted to be attached to a rod elevator, a body having a lower cylindrical portion with a threaded outer surface adapted to be threadedly attached to the inside diameter of a well head, and a second cylindrical portion extending downward from the body, the second cylindrical portion adapted to be threadedly attached to a rod string.
    Type: Application
    Filed: August 31, 2009
    Publication date: March 3, 2011
    Inventors: Christopher Duane Fuss, Jarett Lee Puss
  • Patent number: 7896087
    Abstract: A method of subsurface lubrication facilitates well completion, re-completion and workover while increasing safety and reducing expense. The method involves using a subsurface lubricator mounted to a wellhead of the cased wellbore to lubricate a downhole tool string into the cased wellbore by running a subsurface lubricator through the wellhead and into an upper section of a production casing of the cased wellbore.
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: March 1, 2011
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: L. Murray Dallas
  • Patent number: 7806175
    Abstract: A retrievable frac mandrel and a well control adapter are used to efficiently accomplish well completion, re-completion or workover. The retrievable frac mandrel is inserted in a tubing head spool of a well to be completed, re-completed or re-worked. The well control adapter is mounted to a top of the tubing head spool and seals off against a top of the retrievable frac mandrel. After well completion, re-completion or workover is completed, the frac mandrel can be retrieved from the tubing head spool without killing or plugging the well.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: October 5, 2010
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: Barton E. Hickie
  • Patent number: 7779921
    Abstract: A wellhead completion assembly has a head connected to surface casing. A rotatable flange or the like can be used to connect various components to a threaded end of the head. A casing hanger installs in the head, and the hanger's upper end extends beyond the head's top edge. This exposed end has an external threaded connection to connect to various wellhead components using a rotatable flange or the like. For example, a locking ring can threadably connect to the head's threaded end to support the hanger in the head. Then, a rotatable flange can threadably connect to the hanger's exposed end so that another component, such as a completion spool or gate valve, can nippled up directly to the hanger. When the hanger is fluted, a pack-off assembly can allow testing off inner and outer sealing integrity via a test port accessible through an opening in the locking ring.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: August 24, 2010
    Assignee: Weatherford/Lamb, Inc.
    Inventors: Brandon Matthew Cain, Todd Travis, Michael L. Bilyeu, Gordon Ronnie Altman, Steve Willard, Carl Edwin Davidson, John Rogers
  • Patent number: 7775288
    Abstract: A retrievable frac mandrel and a well control stack are used to efficiently accomplish well completion, re-completion or workover. The retrievable frac mandrel is inserted in a tubing head spool of a well to be completed, re-completed or re-worked. The well control stack is mounted to a top of the tubing head spool and seals off against a top of the retrievable frac mandrel. Once well completion, re-completion or workover is completed, the frac mandrel can be retrieved from the tubing head spool without killing or plugging the well.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: August 17, 2010
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: Barton E. Hickie
  • Publication number: 20100170679
    Abstract: A technique is provided for terminating tubing. In the technique, a tubing termination assembly is used to terminate control line tubing from a downhole safety valve at a wellhead component. The tubing termination assembly utilizes a seal ring to form a seal around control line tubing extending from a port through a wellhead component. A seating surface is provided in the seal ring, rather than in the wellhead component, to which a seal member is abutted to form the seal with the control line tubing. The seal ring also comprises a threaded portion to enable a threaded member to urge the seal member against the seating surface.
    Type: Application
    Filed: January 5, 2009
    Publication date: July 8, 2010
    Inventor: Eugene A. Borak, JR.
  • Patent number: 7740061
    Abstract: A method and apparatus for installing casing hangers in a wellbore utilizing an externally activated gripping system to temporarily bind wearbushings secured to casing and tubing hangers in order to lock-down such hangers during various wellbore drilling activities, thereby minimizing the size of landing shoulders and eliminating additional lock down equipment and simplifying running procedures.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: June 22, 2010
    Assignee: Plexus Ocean Systems Ltd.
    Inventors: Bernard Herman Van Bilderbeek, Craig Hendrie
  • Publication number: 20100147533
    Abstract: A seal assembly for sealing between wellhead members in a wellhead, the assembly may include a seal element and a lockdown member. The seal assembly is attachable to either one of the wellhead members by coupling the lockdown member to a locking surface on the wellhead member. The lockdown member and locking surface may include corresponding profiles for mating engagement thereby preventing relative movement between the wellhead member and seal assembly.
    Type: Application
    Filed: December 11, 2008
    Publication date: June 17, 2010
    Applicant: VETCO GRAY INC.
    Inventor: John E. Nelson
  • Patent number: 7726393
    Abstract: A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.
    Type: Grant
    Filed: May 21, 2008
    Date of Patent: June 1, 2010
    Assignee: Duhn Oil Tool, Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 7650936
    Abstract: A drilling flange and an independent screwed wellhead provides a metal-to-metal seal that supplements the traditional elastomeric O-rings for providing a fluid seal between the drilling flange and the wellhead. The metal-to-metal seal may be achieved using a metal ring gasket or two contacting metal surfaces that are machined to required tolerances and are configured to be forced together when the drilling flange is mounted to the wellhead. The metal-to-metal seal ensures a fluid seal between the flange body and the wellhead in the event that the O-rings malfunction or are destroyed by fire.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: January 26, 2010
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7637325
    Abstract: A cap for a subsea tree having a re-entry hub (1) and for use with a tubing hanger (25) deployed within the tree comprises an outer sleeve (3) for fitment over the hub and an inner sleeve (19) adapted to extend within the hub. The sleeve has communication couplers (27, 37) for cooperation with the tubing hanger. Preferably the communication couplers are located at the extremity of the inner sleeve. The couplers can accommodate dummy plugs or live couplers to suit the mode of application. The inner sleeve (19) supports at least one annular seal (21, 22) which provides a barrier between the inner sleeve and the inner periphery of the hub. The outer sleeve (19) includes releasable engagement fittings (16) for securing the outer sleeve to the hub. The cap is adapted for use as a running tool.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: December 29, 2009
    Assignee: Aker Subsea Limited
    Inventors: Cecil C Goonetilleke, Oystein Mogedal, Knut Mogedal
  • Patent number: 7621338
    Abstract: A wellhead assembly includes a tree cap having a production mandrel extending down into a production passage of a Christmas tree to form a seal. The tree has an annulus bore and an annular cavity at the upper end of the tree surrounding the upper ends of the production and annulus bore. A communication gallery leads between the annulus bore and the cavity. The tree cap also includes an annular sealing member that enters the cavity for sealing a communication gallery.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: November 24, 2009
    Assignee: Vetco Gray Inc.
    Inventors: Michael A. Wenham, Alistair D. Crozier
  • Patent number: 7621340
    Abstract: The invention describes a system for capping an abandoned well having production casing and surface casing. The system enables the effective sealing of the production casing volume from the surface casing volume such that any gases leaking from either volume can be independently released from independent valves. The system is particularly effective in improving the safety of re-entering an abandoned well.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: November 24, 2009
    Assignee: CCS Corporation
    Inventors: Kary Cuthill, Daryl Cuthill
  • Patent number: 7614448
    Abstract: An apparatus operatively coupled to a well having a production casing positioned therein, the apparatus including a first device having and internal bore, a second device having an internal bore, and a fracture isolation sleeve disposed at least partially within the internal bores of the first and second devices, wherein the fracture isolation sleeve has an internal diameter that is greater than or equal to an internal diameter of the production casing.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: November 10, 2009
    Assignee: FMC Technologies, Inc.
    Inventors: Gerald Brian Swagerty, Brandon Matthew Cain, Huy LeQuang, Bill Albright
  • Patent number: 7604050
    Abstract: A test plug tool for use in testing a pressure integrity of a pressure control stack mounted to a wellhead, including a joint between a casing and a casing support in the wellhead. The test plug tool includes a test plug of an appropriate diameter used to pressure test the pressure control stack as well as a joint between any one of a surface casing and the wellhead, an intermediate casing and an intermediate casing mandrel, and a production casing and a production casing mandrel. The pressure integrity of the wellhead is ensured at each stage of well drilling and well completion, and safety is improved. Optionally, a backpressure valve permits pressurized fluid that leaks below the test plug tool to flow upwardly through a central bore in a landing tool that is secured to the test plug tool to permit detection of the leak.
    Type: Grant
    Filed: April 30, 2008
    Date of Patent: October 20, 2009
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7604058
    Abstract: A casing mandrel for an independent screwed wellhead includes a seal bore for receiving a fixed-point packoff connected to a high-pressure mandrel of a pressure isolation tool, and a pin thread adapted for engagement with a box thread of a tubing head supported by the casing mandrel.
    Type: Grant
    Filed: August 2, 2007
    Date of Patent: October 20, 2009
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: Bob McGuire
  • Patent number: 7600571
    Abstract: A reentry apparatus for installation on an abandoned well with a surface casing and a production casing inside and below the top end of the surface casing. A production plate seals the production casing. The apparatus includes a drill guide tube with a bottom end attachable to the production plate and configured to extend up above the top end of the surface casing. A surface plate seals the top of the surface casing and the tube extends up through the surface plate and is sealed thereto. A vent hole extends through the tube wall between the surface and production plates. A plug blocks the central passage of the tube above the vent hole. The tube is adapted for releasable attachment of a cap and a pressure control apparatus with drilling tool such that the drilling tool can bore through the plug while containing pressurized fluid in the surface casing.
    Type: Grant
    Filed: September 24, 2007
    Date of Patent: October 13, 2009
    Inventor: Christopher John Smith
  • Patent number: 7584797
    Abstract: A method of subsurface lubrication facilitates well completion, re-completion and workover while increasing safety and reducing expense. The method involves using a subsurface lubricator mounted to a wellhead of the cased wellbore to lubricate a downhole tool string into the cased wellbore by running a subsurface lubricator through the wellhead and into an upper section of a production casing of the cased wellbore.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: September 8, 2009
    Assignee: Stinger Wellhead Protection, Inc.
    Inventor: L. Murray Dallas
  • Publication number: 20090200039
    Abstract: A technique is provided for securing a subsea well that has had some of its components damaged as a result of a storm or other catastrophic event. The techniques utilizes a casing head assembly that may secured to the casing of the damaged well by tightening a plurality of set screws to drive slips into the casing. The casing head assembly may also comprise a tubing hanger. Tubing head set screws may then be tightened to activate the tubing hanger to secure the production tubing to the casing head. The casing head assembly may also comprise a latch-lock connector that may be secured to the casing head by stabbing the latch-lock connector into the casing head and rotating the connector approximately one-quarter turn. A corrosion cap may then be secured to the latch-lock connector to cover the end of the production tubing.
    Type: Application
    Filed: February 7, 2008
    Publication date: August 13, 2009
    Inventors: John M. Murphy, JR., Ronald C. Gilbert, Sigifredo Alvarado
  • Patent number: 7571764
    Abstract: A well cover arrangement is shown for covering the exposed opening of a well where the well has a submersible pump supported on a collared well string which is suspended downwardly in the well. The cover arrangement includes both a U-plate with a U-shaped opening therein and a door element which fits within the U-plate opening. Once the door element is properly positioned on the U-plate, cooperating locking elements maintain its proper position. The ultimate weight of the well tubing string further secures the door element as the collar in the well string contacts a portion of the door element, making removal of the door element only possible by first lifting the well string.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: August 11, 2009
    Inventor: Jess Sammann
  • Patent number: 7568527
    Abstract: The invention includes methods of collecting crude oil and apparatus which collect crude oil. In one implementation, a crude oil collection header apparatus comprises a collection reservoir. A plurality of fluid conduits is connected to feed crude oil to the collection reservoir. The fluid conduits respectively comprise a collection reservoir feed valve, a bypass valve, and a crude oil feed inlet received between the collection reservoir feed and bypass valves. A flow meter conduit is connected with multiple of the plurality of fluid conduits downstream of the respective bypass valves. A flow meter is operably connected with the flow meter conduit. A crude oil outlet is associated with the collection reservoir. Other aspects and implementations are disclosed.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: August 4, 2009
    Assignee: Rock Well Petroleum, Inc.
    Inventors: Jonathan Richter, John McCarthy
  • Patent number: 7562702
    Abstract: As may be used in a positive displacement pump system, a capped stuffing box assembly includes a stuffing box mountable to a discharge tee to prevent pumped fluid from escaping collection via the discharge tee. The stuffing box is capped by a drain cup that may be releasably mounted to the stuffing box and fixedly mounted to a drive pump motor frame, the drain cap having a drain port to communicate leakage upon failure or pre-failure of the seals in the stuffing box. Upon such failure, the stuffing box may be removed from the drain cap and replaced, while alignment between the actuating rod, drive motor, pump actuator, and drain cap is maintained.
    Type: Grant
    Filed: May 19, 2005
    Date of Patent: July 21, 2009
    Assignee: Blackhawk Environmental Co.
    Inventors: Mark Bertane, Michael Dominik
  • Publication number: 20090159261
    Abstract: A device comprised of a basin forming a reservoir and a lip extending downward from the bottom surface of the basin and adapted to temporarily secure the device to a wellhead such that the device at least partly conceals the wellhead. In one embodiment, the device is a bird bath.
    Type: Application
    Filed: December 21, 2007
    Publication date: June 25, 2009
    Inventors: Martin G. Lira, Linda A. Lira, Jeffrey S. Nachreiner
  • Patent number: 7543649
    Abstract: The invention includes methods of collecting crude oil and apparatus which collect crude oil. In one implementation, a crude oil collection header apparatus includes a collection reservoir and a plurality of fluid conduits connected to feed crude oil to the collection reservoir. The fluid conduits respectively include a collection reservoir feed valve, a bypass valve, and a crude oil feed inlet received between the collection reservoir feed and bypass valves. A bypass conduit to which the fluid conduits connect is received downstream of the respective bypass valves. The bypass conduit includes a gas separator device. A flow meter conduit is connected with the bypass conduit downstream of the gas separator device. A flow meter is operably connected with the flow meter conduit. A crude oil outlet is associated with the collection reservoir. Other aspects and implementations are disclosed.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: June 9, 2009
    Assignee: Rock Well Petroleum Inc.
    Inventors: Jonathan Richter, John McCarthy
  • Publication number: 20090114397
    Abstract: A hybrid wellhead system is assembled using a plurality of threaded unions, such as spanner nuts or hammer unions, for securing respective tubular heads and a flanged connection for securing a flow control stack to a top of a tubing head spool. The tubing head spool is secured by a threaded union to an intermediate head spool. The intermediate head spool is secured by another threaded union to a wellhead. Each tubular head secures and suspends a tubular string in the well bore. The hybrid wellhead system is capable of withstanding higher fluid pressures than a conventional independent screwed wellhead, while providing a more economical alternative to a flanged, or ranged, wellhead system because it is less expensive to construct and faster to assemble.
    Type: Application
    Filed: December 31, 2008
    Publication date: May 7, 2009
    Applicant: STINGER WELLHEAD PROTECTION, INC.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7520322
    Abstract: A wellhead assembly is provided including a casing and a tubular member mounted over the casing. A flange extends from the tubular member. A generally elongated annular member is provided in the tubular member. The generally elongated annular member has a first end portion above the tubular member and second end portion below the first end portion. A seal is formed between the second end portion and the tubular member. A hanger may be suspended within the tubular member. In such case, a seal may be formed between the elongate annular member and the hanger.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: April 21, 2009
    Assignee: Duhn Oil Tool, Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 7516786
    Abstract: A test plug tool for use in testing a pressure integrity of a pressure control stack mounted to a wellhead, including a joint between a casing and a casing support in the wellhead. The test plug tool includes a test plug of an appropriate diameter used to pressure test the pressure control stack as well as a joint between any one of a surface casing and the wellhead, an intermediate casing and an intermediate casing mandrel, and a production casing and a production casing mandrel. The pressure integrity of the wellhead is ensured at each stage of well drilling and well completion, and safety is improved. Optionally, a backpressure valve permits pressurized fluid that leaks below the test plug tool to flow upwardly through a central bore in a landing tool that is secured to the test plug tool to permit detection of the leak.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: April 14, 2009
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7493944
    Abstract: A wellhead assembly is provided including a first tubular member, a hanger mounted within the first tubular member and an annular member coupled to the outer surface of the hanger. The assembly also includes a second tubular member mounted to the annular member and surrounding a portion of the hanger. A method is also provided for fracturing a well requiring coupling a tubing mandrel hanger to a casing, the hanger having a central bore, coupling an annular nut on a portion of the outer surface of the hanger, mounting a tubular member having a flange over the hanger and on the flange, and applying fluids though the bore formed though the hanger for fracturing the well.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: February 24, 2009
    Assignee: Duhn Oil Tool, Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 7490666
    Abstract: An apparatus operatively coupled to a well having a production casing positioned therein, the apparatus including a first device having and internal bore, a second device having an internal bore, and a fracture isolation sleeve disposed at least partially within the internal bores of the first and second devices, wherein the fracture isolation sleeve has an internal diameter that is greater than or equal to an internal diameter of the production casing.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: February 17, 2009
    Assignee: FMC Technologies, Inc.
    Inventors: Gerald Brian Swagerty, Brandon Matthew Cain, Huy LeQuang, Bill Albright
  • Patent number: RE41507
    Abstract: An air filter for a well is installed within a well casing of the well. The air filter forming an airtight seal around the well casing of the well, such that all the air that enters and exits the well must pass through the air filter. The air filter preferably includes a filter housing, at least one removable gasket and a removable filter cartridge installed within an opening extending through the filter housing. The air filter prevents dirt, dust, bacteria, gaseous chemicals, volatile organic compounds, (VOCs), insects and other air born airborne contaminants from entering and possibly contaminating the well. An air filter may also be installed within a vent pipe extending through a well seal attached to the top of a well casing of a well.
    Type: Grant
    Filed: February 2, 2006
    Date of Patent: August 17, 2010
    Assignee: In-Well Technologies, Inc.
    Inventor: Kenneth A. Meyers