Well Caps Or Casing Heads Patents (Class 166/75.13)
  • Patent number: 7475721
    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: February 26, 2008
    Date of Patent: January 13, 2009
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7469742
    Abstract: A gas well cap seal assembly adapted to seal the casing bowl of a gas well and to pressurize the annulus region between the inner surface of the well bore and the outer surface of the well casing which is filled with wet cement. The pressurized annulus aids in the prevention of forming gas bubbles and gas leakage paths in the annulus region.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: December 30, 2008
    Inventor: Lance Earl Larsen
  • Publication number: 20080289817
    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: Application
    Filed: September 24, 2007
    Publication date: November 27, 2008
    Inventor: Christopher John Smith
  • Publication number: 20080277120
    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: Application
    Filed: May 11, 2007
    Publication date: November 13, 2008
    Inventor: Barton E. Hickie
  • Patent number: 7422070
    Abstract: A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubing head spool for use with the casing mandrel are also provided.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: September 9, 2008
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7416020
    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: August 9, 2007
    Date of Patent: August 26, 2008
    Assignee: Duhn Oil Tool, Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Publication number: 20080185156
    Abstract: A wellhead system, connector, and method of assembling a wellhead system utilizes a connector which includes a set of left-hand threads and a set of right-hand threads.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 7, 2008
    Inventors: Doyle W. Rodgers, Randy P. Nichols, Henry Lang
  • Patent number: 7363969
    Abstract: A casing vent security device includes an in-line section in communication with a casing vent, the in-line section having an ambient air passageway for selectively allowing ambient air to pass through the in-line section and into the vent. The device further includes a plurality of sensors disposed within the in-line section for monitoring the ambient air passing through the in-line section. The device still further includes at least one mechanism for selectively occluding the passage of ambient air into the vent upon receiving a signal from the sensors. The device provides information on the plurality of sensors and the vent.
    Type: Grant
    Filed: August 2, 2004
    Date of Patent: April 29, 2008
    Assignee: Xela Innovations, LLC
    Inventors: Kenneth Muderlak, Todd J. Muderlak
  • Patent number: 7334634
    Abstract: The high pressure adaptor assembly for use in an annular blow out preventers (BOP) or other type BOPs has an upper and lower body with a bore that communicates between the upper and lower body; a top flange connected to the upper body for connection with a pressure control device; a side outlet port disposed in the upper body integrally connected to the bore, wherein the outlet port's side flange engage a line for pump-in or bleed-off of well fluids; a self energizing hold down assembly with a male engagement section disposed between the upper and lower bodies; a flange for connecting to the hold down assembly with a female engagement section for engaging with the hold down assembly's male engagement section; and a seal disposed between the male and female engagement sections and the lower body, wherein the lower body engages the annular seal of the BOP.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: February 26, 2008
    Inventor: Leo William Abel
  • Publication number: 20080035326
    Abstract: A wear-resistant sealing system for introducing fracturing fluids to a wellhead comprising a tubular connector having a retaining shoulder and bridging a flange interface created between a frachead and a lower tubular structure. The tubular connector has upper and lower sealing elements above and below the flange interface and forms a contiguous bore for fluid communication of the fracturing fluids from the frachead to the lower tubular structure and wellhead.
    Type: Application
    Filed: August 8, 2007
    Publication date: February 14, 2008
    Applicant: ISOLATION EQUIPMENT SERVICES INC.
    Inventor: Boris (Bruce) P. Cherewyk
  • Patent number: 7325598
    Abstract: A method and apparatus for attaching a first component which comprises a depending portion to a second component which comprises a bore that is sized and configured to receive the depending portion, wherein the first and second components are exposed to a fluid which is at an ambient pressure, comprises the steps of inserting the depending portion at least partially into the bore and then creating a bore pressure within the bore which is less than the ambient pressure. In this manner a pressure difference between the ambient pressure and the bore pressure will force the depending portion into the bore to thereby attach the first component to the second component.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: February 5, 2008
    Assignee: FMC Technologies, Inc.
    Inventor: Christopher D. Bartlett
  • Patent number: 7308934
    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: February 18, 2005
    Date of Patent: December 18, 2007
    Assignee: FMC Technologies, Inc.
    Inventors: Gerald Brian Swagerty, Brandon Matthew Cain, Huy LeQuang, Bill Albright
  • Patent number: 7296631
    Abstract: A low-pressure wellhead system with tubular heads and mandrels secured independently using threaded unions. A casing mandrel is secured to a wellhead by a first threaded union. Likewise, a tubing head spool is secured to the casing mandrel using a threaded union. A tubing hanger is also secured to the tubing head spool using a threaded union. An adapter flange may also be secured to the tubing hanger by a threaded union. Because this low-pressure wellhead is faster and easier to assemble and provides full bore access, there is less rig downtime, thus rendering the well completion process faster and more economical.
    Type: Grant
    Filed: February 2, 2007
    Date of Patent: November 20, 2007
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7278490
    Abstract: A blast joint swivel for use in a wellhead isolation tool includes a blast joint hanger mounted to a top of the wellhead isolation tool and a swivel body rotatably received in the blast joint hanger. The swivel body threadedly connects to a blast joint, which in turn threadedly connects to a top end of a tubing string suspended in a well. The blast joint swivel can also be displaced vertically over a limited range between upper and lower abutments.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: October 9, 2007
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7237615
    Abstract: A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubing head spool for use with the casing mandrel are also provided. Safety of well stimulation procedures is thereby improved and well completion time is significantly reduced.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: July 3, 2007
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7231968
    Abstract: A system for capping the upper opening of a well having an accommodation for a remotely-located control device. More specifically, a well cap system for a water-well having a pipe casing that permits one or more well control apparatus to be located within the well cap. The system is a two-part assembly, comprising a base and hollow cover, both arranged to be supported by the pipe casing. Further, a constant pressure well system utilizing the water-well cap system.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: June 19, 2007
    Inventor: Eric Owens
  • Patent number: 7231983
    Abstract: The present invention is directed to a split locking ring for wellhead components. In one illustrative embodiment, the device comprises a first internally threaded wellhead component, a second wellhead component, at least a portion of which is positioned within an opening in the first wellhead component, and a rotatable split lock ring comprised of at least two externally threaded sections, wherein at least a portion of the sections of the split lock ring are positioned between the first and second wellhead components and rotated to threadingly couple the sections of the split lock ring to the first wellhead component and thereby secure the second wellhead component to the first wellhead component.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: June 19, 2007
    Assignee: FMC Technologies, Inc.
    Inventors: Huy Lequang, Joseph Shu Yian Liew, Brian J. Baca, Hoa Ngoc Nguyen, Kevin Kok Sum Lim
  • Patent number: 7207384
    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: March 12, 2004
    Date of Patent: April 24, 2007
    Assignee: Stinger Wellhead Protection, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7163054
    Abstract: The invention is directed to breechblock connections to and between oil field equipment and oil field lines for use with oil field equipment associated with oil and gas exploration, drilling, and production. The oil field lines and oil field equipment of the invention include a breechblock connection for quick and easy removal and installation of the oil field lines to oil field equipment and to other oil field lines, and connections between different pieces of oil field equipment. Methods of connecting lines to oil field equipment and connecting one piece of oil field equipment to a second piece of oil field equipment are also disclosed.
    Type: Grant
    Filed: April 19, 2004
    Date of Patent: January 16, 2007
    Assignee: Control Flow Inc.
    Inventor: James Murph Adams
  • Patent number: 7159664
    Abstract: A method of extending an insulated wire through a wellhead opening of a well that includes casing having a top. The method makes use of an annular cap sized to engage and be retained by the top of the casing, the annular cap having smooth top and radially inward surfaces and defining an aperture. The annular cap is placed onto the top of the casing and the insulated wire is passed through the aperture, wherein should the insulated wire touch the annular cap the insulated wire will remain undamaged by the smooth top and radially inward surfaces.
    Type: Grant
    Filed: September 22, 2004
    Date of Patent: January 9, 2007
    Assignee: Sanetel Pumps, Inc.
    Inventor: Bryan D. Ross
  • Patent number: 7159663
    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: Grant
    Filed: March 17, 2004
    Date of Patent: January 9, 2007
    Assignee: Oil States Energy Services, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7159652
    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: September 4, 2003
    Date of Patent: January 9, 2007
    Assignee: Oil States Energy Services, Inc.
    Inventors: Bob McGuire, L. Murray Dallas
  • Patent number: 7128143
    Abstract: A method and apparatus for a seal assembly for a unitized wellhead system for land or platform applications utilizes a friction grip technology to create maintainable metal-to-metal seals with finely-controlled contact stresses, lock-down casing and tubing hangers, support test loads to minimize the size of landing shoulders required, and to rotationally lock casing hangers to provide simplified running procedures. The system can be used in combination with a friction grip clamping assembly to greatly streamline the wellhead design.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: October 31, 2006
    Assignee: Plexus Ocean Systems Ltd.
    Inventor: Bernard Herman Van Bilderbeek
  • Patent number: 7066269
    Abstract: A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubing head spool for use with the casing mandrel are also provided. Safety of well stimulation procedures is thereby improved and well completion time is significantly reduced.
    Type: Grant
    Filed: May 19, 2003
    Date of Patent: June 27, 2006
    Assignee: H W C Energy Services, Inc.
    Inventors: L. Murray Dallas, Bob McGuire
  • Patent number: 7051804
    Abstract: A cap for covering an open upper end of a subsea structure includes a base and a body. The base has a size, after shrinkage, at least slightly larger than the exterior of the open upper end of the subsea structure. The body is connected to the base and projects downward from the base. The body has an open bottom. The cap is positioned over the open upper end of the subsea structure with the base of the cap resting on the open upper end of the subsea structure and the body of the cap forms a wall around the exterior of the open upper end of the subsea structure for inhibiting the cap from slipping off the open upper end of the subsea structure.
    Type: Grant
    Filed: May 16, 2003
    Date of Patent: May 30, 2006
    Inventor: Michael Dean Arning
  • Patent number: 7025132
    Abstract: A flow completion apparatus comprises a wellhead housing installed at an upper end of a well bore and a tubing spool connected over the wellhead housing. The tubing spool includes a central bore extending axially therethrough, a production outlet communicating with the central bore and an annulus passageway communicating with the tubing annulus. A tubing hanger is supported in the central bore and includes a production bore extending axially therethrough and a production passageway communicating between the production bore and the production outlet. The tubing spool comprises a workover passageway extending between the annulus passageway and a portion of the central bore located below the top of the tubing hanger. Furthermore, the tubing hanger comprises an annulus bore extending between the workover passageway and the top of the tubing hanger.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: April 11, 2006
    Assignee: FMC Technologies, Inc.
    Inventors: Richard D. Kent, Michael R. Tierney, Gregory L. Glidden, Christopher E. Cunningham, Christopher D. Bartlett
  • Patent number: 7013970
    Abstract: A completion system comprises a christmas tree (10) mounted on a wellhead housing (11), a tubing hanger (12) landed in the tree or wellhead housing, the wellhead housing (11) being mounted on a casing string (100) and a tubing string (14) being suspended from the tubing hanger within the casing string; wherein, in use, the annulus defined between the tubing (14) and the casing (100) serves as a production bore. A second tubing string (98) is expanded into sealing engagement with the casing string (100) over at least a portion of their lengths. The annulus normally used to provide well service functions is thus eliminated. Well servicing is instead provided via the tubing string (14), which may be coiled tubing.
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: March 21, 2006
    Assignee: FMC Technologies, Inc.
    Inventors: Graeme John Collie, David Ramsay Hutchison, Richard Kent
  • Patent number: 6997260
    Abstract: The disclosure concerns a method and apparatus for repairing or structurally reinforcing an oil and gas well tubular member, or an assembly of tubular members. The assembly to be repaired can include a smaller diameter inner flow conveying conduit (or production tubing) and a larger diameter concentrically placed surface casing, providing an annulus in between the production tubing and the surface casing. A third casing pipe of largest diameter, the drive pipe is placed around the surface casing string. Other “conductor” casing pipes can be positioned around the surface casing inside the drive pipe. Part of the surface casing string (or other conductor pipe) can suffer damage due to corrosion. A sleeve or repair member is placed around the casing string or other tubular member at a damaged portion.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: February 14, 2006
    Inventors: Bruce Trader, George Hofmeister
  • Patent number: 6962205
    Abstract: A clamp for supporting a subsea wellhead and attached casing string preparatory to installing same in a well, and slip bowl assembly for running a drill pipe cementing string inside the casing string. The clamp comprises two hinged together clamp halves with a connector to permit the clamp to be locked about a subsea wellhead. Half-circle cutouts in each clamp half form a clamp bore when the clamp is closed. The clamp bore has a grooved profile to mate with a grooved profile on the exterior of the subsea wellhead. When the subsea wellhead is clamped in place, with the clamp resting on the rig floor, a slip bowl assembly having a grooved base plate is placed atop the clamp.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: November 8, 2005
    Inventor: Milford Lay, Jr.
  • Patent number: 6920925
    Abstract: A wellhead isolation tool and a wellhead assembly incorporating such a tool are provided. The wellhead assembly has an annular assembly coupled to a well. The annular assembly may include a casing head coupled to the well and a tubing head mounted over the casing head. The wellhead isolation tool is suspended in the annular assembly. The wellhead isolation tool has a first end portion extending above the annular assembly and a second end portion below the first end portion within the annular assembly. A production casing suspended in the annular assembly and is aligned with the wellhead isolation tool.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: July 26, 2005
    Assignee: Duhn Oil Tool, Inc.
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 6907932
    Abstract: A latchdown mechanism 11 latches a control pod 10 to a lower mounting plate 14 of a subsea tree. A receptacle housing 12 secured to subsea tree receives the control pod therein and has an interior latching surface 13 at an upper end of the receptacle housing. A latchdown actuator 15 is supported on the control pod, and moves a plurality of gripping arms 22 for engagement and disengagement with the latching surface to selectively connect and disconnect the control pod 12 to the structure in response to the latchdown actuator.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: June 21, 2005
    Assignee: Drill-Quip, Inc.
    Inventor: Larry E. Reimert
  • Patent number: 6889770
    Abstract: Method for protecting subsea installations against cooling which leads to hydrate formation, in particular during production halts. This is achieved by thermally isolating portions of the installation (1) against the surrounding water (2), and particularly by completely encompassing the subsea installation (1) by means of a cap (3) which seals against the surrounding water (2). The cap (3) comprises several elements of which each separately can be exposed to cooling and internal hydrate formation. The invention also comprises a thermally isolating apparatus, adapted for protecting subsea installations (1) against cooling, which involves a risk for hydrate formation. An apparatus (3, 9) for implementing the method comprises a relatively tight-fitting cap (3) which encompasses at least two of the elements to be protected from cooling.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: May 10, 2005
    Assignee: ABB Offshore Systems AS
    Inventors: Helge Andreas Qvam, Patrice Augilera, Steinar Hestetun
  • Patent number: 6845815
    Abstract: A temporary abandonment cap includes a body, a pressure-retaining top portion extending across the body and a plurality of locking pins coupled to the body and a single moveable handle, the locking pins being adapted to be moved from an engaged position to a disengaged position by movement of the single handle. The temporary abandonment cap is lightweight, reusable, and can be placed on and retrieved from an open pipe of a subsea well.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: January 25, 2005
    Assignee: FMC Technologies, Inc.
    Inventors: Thomas Hergarden, Richard Murphy, Paul Riley
  • Patent number: 6843313
    Abstract: A pump drive head for a progressing cavity pump comprises a top mounted stuffing box rotatably disposed around a compliantly mounted standpipe with a self or manually adjusting pressurization system for the stuffing box. To prevent rotary and vertical motion of the polish rod while servicing the stuffing box, a polished rod lock-out clamp is provided with the pump drive head integral with or adjacent to a blow-out-preventer which can be integrated with the pump drive head to save space and cost. A centrifugal backspin braking system located on the input shaft and actuated only in the backspin direction and a gear drive between the input shaft and output shaft are provided.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: January 18, 2005
    Assignee: Oil Lift Technology, Inc.
    Inventor: Vern A. Hult
  • Patent number: 6834718
    Abstract: A connector head, for transferring at least a portion of the load from an inner tubular body onto an outer tubular body, comprises a generally tubular connector head formed with a central bore through which the inner tubular body extends. The connector head has an inwardly extending stop shoulder to allow the connector head to rest on the upper end of the inner tubular body. A slip connecting means is located in the connector head for gripping the outer wall of the inner tubular body. A base plate, formed with a central bore therethrough, is located below the connector head and is adapted to rest on the upper end of the outer tubular body. A retainer ring, formed with a central bore therethrough, is located between the connector head and the base plate and includes a plurality of threaded stud members extending therethrough allowing the retainer ring to slide upwardly and downwardly on the threaded stud members.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: December 28, 2004
    Assignee: Stream-Flo Industries, Ltd.
    Inventor: Matthew Thomas Robinson Webster
  • Publication number: 20040251018
    Abstract: A frac head comprising a main body with plural side entries oriented around the main body such that flow from each of the side entries meets flow from an opposing side entry in the internal bore. A replaceable abrasion resistant wear sleeve is secured in the internal bore of the main body downstream of the side entries and positioned to intercept flow from the side entries and prevent the flow from impacting directly on material of the main body. The side entries terminate at the internal bore equidistantly from the lower end of the main body, and are symmetrically arranged around the main body. The side entries are oriented at about 450 to the downstream direction. The replaceable abrasion resistant wear sleeve is held against movement downstream by abutment of a shoulder on the replaceable abrasion resistant wear sleeve against a shoulder on the frac body, and has a tapered internal bore.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 16, 2004
    Inventors: Roderick D. McLeod, Jerry A. Johnson
  • Publication number: 20040251031
    Abstract: A subsea well assembly includes a wellhead housing 50 having a cylindrical inner sealing surface and a tubular hanger 10 having a tapered external sealing surface. The running tool 30 includes a central stem 40 connected to the running string. A setting piston 72 is responsive to fluid pressure in the annulus about the running string, and has a radially outer surface and a radially inner surface each for sealing with the running tool body. Fluid pressure to set the seal assembly may be applied to the setting piston through an annulus about the running string, and may also act directly on an initially set seal assembly 20.
    Type: Application
    Filed: June 8, 2004
    Publication date: December 16, 2004
    Inventor: Larry Reimert
  • Patent number: 6823941
    Abstract: A flow diverter assembly for a tree, the flow diverter assembly having a flow diverter to divert fluids flowing through the production bore of the tree from a first portion of the production bore to the cap, and to divert the fluids back from the cap to a second portion of the production bore for recovery therefrom via an outlet, wherein the flow diverter is detachable from the cap to enable insertion of the flow diverter through the cap.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: November 30, 2004
    Inventor: Ian Donald
  • Publication number: 20040231856
    Abstract: A casing mandrel for an independent screwed wellhead includes a pin thread adapted for engagement with a box thread of a well stimulation tool lockdown nut for securing the well stimulation tool against the casing mandrel top end. A well stimulation tool and a tubing head spool for use with the casing mandrel are also provided. Safety of well stimulation procedures is thereby improved and well completion time is significantly reduced.
    Type: Application
    Filed: May 19, 2003
    Publication date: November 25, 2004
    Inventors: L. Murray Dallas, Bob McGuire
  • Publication number: 20040231835
    Abstract: A well completion system comprises a tubing head which includes a central bore that extends axially therethrough and at least one fluid port that extends through the tubing head to the central bore, a tubing hanger which is supported in the central bore, an alignment pin which is mounted in the fluid port and which comprises a key portion that protrudes into the central bore, and structure for engaging the key portion to orient the tubing hanger relative to the tubing head. In this arrangement a blind flange may be secured to the tubing head over the fluid port to effectively seal the fluid port from the environment.
    Type: Application
    Filed: March 14, 2003
    Publication date: November 25, 2004
    Applicant: FMC Technologies, Inc.
    Inventors: Duy Quoc Thai, Jason D. Busch, Ommi Tanpa, Huy Lequang, Kenneth G. Rountree
  • Patent number: 6817423
    Abstract: An apparatus for protecting equipment in a wellhead from exposure to fluid pressures, abrasives and corrosive fluids used in a well treatment to stimulate production, includes a mandrel to be inserted through the wellhead into an operative position. The apparatus further includes injectors for reciprocating the mandrel to and from the operative position. The injectors are connected on their top ends to a connector plate that provides a support platform to permit equipment, such as blowout preventers, wireline units, coil tubing injectors or the like, to be mounted to the top of the apparatus.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: November 16, 2004
    Inventor: L. Murray Dallas
  • Publication number: 20040168795
    Abstract: A system for capping the upper opening of a well having an accommodation for a remotely-located control device. More specifically, a well cap system for a water-well having a pipe casing that permits one or more well control apparatus to be located within the well cap. The system is a two-part assembly, comprising a base and hollow cover, both arranged to be supported by the pipe casing. A constant pressure well system utilizing the water-well cap system is also described.
    Type: Application
    Filed: February 19, 2004
    Publication date: September 2, 2004
    Inventor: Eric Owens
  • Patent number: 6776230
    Abstract: A horizontal Christmas tree is adapted for ESP/HSP or downhole sensor deployment by a coiled tubing hanger 38 received in the tubing hanger 12. Coiled tubing 40 suspends downhole equipment such as ESP 60, and carries power/signal lines. These lines are connected to an external line 58 via a transition connector 46 in a tubing access plug 44 provided in an internal tree cap 32. A debris cap 50 is provided with a further connector 52. Self orientating wet mate connectors 48, 54, 56 are provided between the connectors 46, 52 and external line 58. The coiled tubing hanger and/or tubing hanger may be provided with flow by flutes or holes (78, 80 FIGS. 4 and 5) sealable by a separate adapter plug (88, FIG. 5) above the coiled tubing hanger. Flow test procedures are also disclosed.
    Type: Grant
    Filed: October 21, 2002
    Date of Patent: August 17, 2004
    Assignee: FMC Technologies, Inc.
    Inventors: Graeme John Collie, David Ramsay Hutchison, Richard Kent
  • Publication number: 20040154790
    Abstract: The invention provides a Y-body Christmas tree for use with coil tubing and other wellhead components which integrates components of a Christmas tree, while providing for coil tubing access without necessarily adding to the vertical height of the unit.
    Type: Application
    Filed: February 7, 2003
    Publication date: August 12, 2004
    Inventors: Michael James Cornelssen, Tony M. Lam, Keith David Farquharson
  • Patent number: 6742957
    Abstract: Methods and systems are provided for a vessel or pipeline closure. A closure 10 includes a hub 12 fixedly and sealingly secured to the vessel, and a cap 30 for threaded engagement with the hub 12. An anchor 22 may be fixedly secured to the hub and a tightening pulling stop 32 and a loosening pulling stop 132 each may be fixedly secured to the cap 30. A connector body 26 may be engaged with the anchor 22, and has a through bore 27 to accommodate a threaded rod 44. A flexible, elongate member 46 may be engaged at one end to the threaded rod 44, and selectively engaged with one of the pulling stops 32 or 132. A threaded collar 28 advances the threaded rod 44 axially, thereby rotating the cap 30 relative to the hub 12.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: June 1, 2004
    Assignee: Robbins & Myers Energy Systems, L.P.
    Inventors: Michael Smith, Billy W. White, Blake E. Smith
  • Publication number: 20040040702
    Abstract: The present invention is directed to a lightweight, reusable temporary abandonment cap that can be placed on and retrieved from an open pipe of a subsea well. The invention is further comprised of a body, a pressure-retaining top portion extending across the body and a plurality of locking pins coupled to the body and a single moveable handle, the locking pins being adapted to be moved from an engaged position to a disengaged position by movement of the single handle.
    Type: Application
    Filed: August 27, 2002
    Publication date: March 4, 2004
    Inventors: Thomas Hergarden, Richard Murphy, Paul Riley
  • Patent number: 6688386
    Abstract: This invention provides a tubing hanger system which isolates production tubing from a power cable, protects the cable from high pressure, and enables pressure testing of the production and cable seals. A tubing hanger member is seated in a tubing head to seal against a central bore, and a tubing head adapter is fastened above the tubing head. The tubing head adapter and the tubing hanger member form a tubing port and a cable port. A tubing seal-off nipple connects and seals the tubing port in each of the tubing head adapter and the tubing hanger member, and a cable seal-off nipple connects and seals the cable port in each of the tubing head adapter and the tubing hanger member. Seals are provided between the cable and cable port in the tubing hanger member, and between the cable and cable port in the tubing head adapter.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: February 10, 2004
    Assignee: Stream-Flo Industries Ltd.
    Inventors: Michael James Cornelssen, Keith David Farquharson
  • Patent number: 6684945
    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 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 20, 2002
    Date of Patent: February 3, 2004
    Assignee: In-Well Technologies, Inc.
    Inventor: Kenneth A. Meyers
  • Publication number: 20030205385
    Abstract: A wellhead assembly is provided having a first tubular member, and a second tubular member at least partially extending over a first end of the first tubular member defining an annular space there between. An arcuate lock member such as a lock ring is located within the annular space. At least one load applying member penetrates the second tubular member and urges the arcuate lock member against the first tubular member. A lock nut is coupled to an inner surface of the second tubular member. A method for coupling the first tubular member to the second tubular member is also provided.
    Type: Application
    Filed: June 17, 2003
    Publication date: November 6, 2003
    Inventors: Rex E. Duhn, Robert K. Meek
  • Patent number: 6637509
    Abstract: A stuffing box support assembly is configured to be positioned between a production pumping tree and a stuffing box of a wellhead. In use, the support assembly functions like a joint between the wellhead production tree and the stuffing box. The support assembly is configured such that it could tilt or move laterally to maintain a coaxial relationship between the stuffing box and a polished rod extending therethrough. This alignment between the stuffing box and the polished rod reduces wear and tear of the stuffing box packing.
    Type: Grant
    Filed: January 4, 2002
    Date of Patent: October 28, 2003
    Assignee: Stream-Flo Industries Ltd.
    Inventors: Keith D. Farquharson, Daniel J. Riddell