Assignee: Stinger Wellhead Protection, Inc.

Location: Oklahoma City, OK
No. of patents: 60

Number	Title	Issue Date
8157005	Casing mandrel for facilitating well completion, re-completion or workover 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 t...	04/17/2012
8118090	Hybrid wellhead system and method of use A hybrid wellhead system for a hydrocarbon well, having a wellhead supported by a conductor; an intermediate head spool secured to the wellhead by a hammer union; and a tubing head spool secured to the intermediate head spool by a hammer union. ...	02/21/2012
8113275	Multipart frac head with replaceable components A multipart frac head with removable components permits the frac head to be refurbished in the field. A bottom leg and inlet ports of the multipart frac head can be replaced. ...	02/14/2012
8100185	Multi-lock adapters for independent screwed wellheads and methods of using same A multi-lock adapter used to inject high-pressure well stimulation fluids through an independent screwed wellhead includes an adapter pin having a central passageway with an internal diameter at least as large as a passageway through the wellhead. A lockdown flange ...	01/24/2012
8100175	Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same Fracturing heads with one or more replaceable wear-resistant inserts have annular sealing elements for inhibiting fracturing fluids from circulating between the inserts and a main body of the fracturing head. Worn inserts and degraded sealing elements are easily rep...	01/24/2012
RE42772	Large particulate removal system A choke for removing large diameter particulate matter from an oil or natural gas well includes a housing having a chamber with an integral solids receptacle. The chamber is in communication with a flow stream outlet and a flow stream inlet. The flow stream inlet is...	10/04/2011
8016031	Erosion resistant frac head An erosion resistant frac head with a convergence chamber, an expansion chamber and a mixing chamber provides improved resistance to erosion caused by abrasive frac fluids pumped through the frac head. A bottom leg of the erosion resistant frac head may be replaced ...	09/13/2011
7984932	Threaded union for tubulars used in high-pressure fluid applications A threaded union for tubulars used for high-pressure fluid applications includes a unitary nut supported by at least two nut retainer segments received under a top wall of the nut in an annular segment retainer groove in one of the tubulars. The nut retainer segment...	07/26/2011
7984758	Multi-lock adapters for independent screwed wellheads and methods of using same A multi-lock adapter used to inject high-pressure well stimulation fluids through an independent screwed wellhead includes an adapter pin having a central passageway with an internal diameter at least as large as a passageway through the wellhead. A lockdown flange ...	07/26/2011
7967086	Slip spool assembly and method of using same A slip spool includes radially disposed actuators for radially moving slip blocks between a loose encirclement position in which they surround the tubing string and a cached position in which the slip blocks clear an axial passage of the slip spool. The slip spool f...	06/28/2011
7950410	Gate valve with replaceable inserts and method of refurbishing same A gate valve includes a valve body having a cylindrical passage defining a flow path through the valve, a gate for controlling fluid flow through the valve and a replaceable wear-resistant flow-path liner for in the flow path. The flow-path liner includes a pluralit...	05/31/2011
7946558	High-pressure plug valve A plug valve has a valve body, a cage fitted within the valve body and a rotatable plug housed within a cylindrical cavity in the cage, for controlling fluid flow through the valve. The cage has first and second opposed flat side surfaces, each side surface has a po...	05/24/2011
7934546	Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same Fracturing heads with one or more replaceable wear-resistant inserts have annular sealing elements for inhibiting fracturing fluids from circulating between the inserts and a main body of the fracturing head. Worn inserts and degraded sealing elements are easily rep...	05/03/2011
7922216	High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same A metal ring gasket provides a high-pressure temperature tolerant metal-to-metal seal between subcomponents of a threaded union. The metal ring gasket is received in an annular cavity formed between mating surfaces of the subcomponents of the threaded union. The met...	04/12/2011
7921923	Casing mandrel for facilitating well completion, re-completion or workover 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 t...	04/12/2011
7905293	Hybrid wellhead system and method of use 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...	03/15/2011
7896087	Method of subsurface lubrication to facilitate well completion, re-completion and workover 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...	03/01/2011
7886833	System and method for low-pressure well completion 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 ...	02/15/2011
7845619	Two-part back cap for a plug valve and plug valves incorporating same A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back ...	12/07/2010
7874371	Subsurface lubricator and method of use A subsurface lubricator facilitates well completion, re-completion and workover while increasing safety and reducing expense. The subsurface lubricator includes a bi-directional packoff tool on its bottom end. Short hydraulic cylinders lubricate the subsurface lubri...	01/25/2011
7828053	Multipart frac head with replaceable components A multipart frac head with replaceable components permits the frac head to be refurbished in the field. In one embodiment, a bottom leg of the multipart frac head is replaceable. In another embodiment, inlet ports of the frac head are also replaceable. ...	11/09/2010
7806175	Retrivevable frac mandrel and well control stack to facilitate well completion, re-completion or workover and method of use 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 contro...	10/05/2010
7789133	Erosion resistant frac head An erosion resistant frac head with a convergence chamber, an expansion chamber and a mixing chamber provides improved resistance to erosion caused by abrasive frac fluids pumped through the frac head. A bottom leg of the erosion resistant frac head may be replaced ...	09/07/2010
7775288	Retrievable frac mandrel and well control stack to facilitate well completion, re-completion or workover and method of use 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 ...	08/17/2010
7743856	Slip spool assembly and method of using same A slip spool includes radially disposed actuators for radially moving slip blocks between a loose encirclement position in which they surround the tubing string and a cached position in which the slip blocks clear an axial passage of the slip spool. The slip spool f...	06/29/2010
7743822	Snubber spool with detachable base plates A snubber spool with detachable base plates includes a base flange with a plurality of spaced-apart load pins received in through bores in the base plates. Tie plates with bores for receiving top ends of the load pins are mounted over the base plates in an offset or...	06/29/2010
7721808	Hybrid wellhead system and method of use 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...	05/25/2010
7708079	Multi-lock adapters for independent screwed wellheads and methods of using same A multi-lock adapter used to inject high-pressure well stimulation fluids through an independent screwed wellhead includes an adapter pin having a central passageway with an internal diameter at least as large as a passageway through the wellhead. A lockdown flange ...	05/04/2010
7708061	Cup tool, cup tool cup and method of using the cup tool A cup tool includes a cup tool tube having a threaded upper end for connection to a high-pressure mandrel, an outer surface over which an elastomeric cup is slidably mounted for reciprocal movement from an unset position for entry into a wellbore to a set position i...	05/04/2010
7703205	Method of refurbishing a high-pressure plug valve A high-pressure plug valve is refurbished by replacing a valve plug, a valve plug cage, and flow path inserts that line a flow path through the plug valve. The valve plug cage has first and second opposed flat side surfaces, each side surface has a port for receivin...	04/27/2010
7699291	Two-part back cap for a plug valve and plug valves incorporating same A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back ...	04/20/2010
7669654	Cup tool with three-part packoff for a high pressure mandrel A cup tool for use with a high-pressure mandrel of a wellhead isolation tool has a three-part packoff assembly that slides over a cup tool tube from an unset position to a set position. The three-part packoff assembly includes an elastomeric cup, a rigid alignment r...	03/02/2010
7654585	High-pressure threaded union with metal-to-metal seal, and metal ring gasket for same A metal ring gasket provides a high-pressure temperature tolerant metal-to-metal seal between subcomponents of a threaded union. The metal ring gasket is received in an annular cavity formed between mating surfaces of the subcomponents of the threaded union. The met...	02/02/2010
7650936	Drilling flange and independent screwed wellhead with metal-to-metal seal and method of use 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 r...	01/26/2010
7628201	Fracturing head with replaceable inserts for improved wear resistance and method of refurbishing same Fracturing heads with one or more replaceable wear-resistant inserts have annular sealing elements for inhibiting fracturing fluids from circulating between the inserts and a main body of the fracturing head. Worn inserts and degraded sealing elements are easily rep...	12/08/2009
7604058	Casing mandrel for facilitating well completion, re-completion or workover 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 t...	10/20/2009
7604050	Wellhead and control stack pressure test plug tool 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 t...	10/20/2009
7597307	Two-part back cap for a plug valve and plug valves incorporating same A two-part back cap for a plug valve includes a back cap seal body and a back cap retainer nut. The back cap retainer nut secures the back cap seal body within the plug valve and securely supports the back cap seal body. A gap between an outer periphery of the back ...	10/06/2009
7584798	Subsurface lubricator and method of use A subsurface lubricator facilitates well completion, re-completion and workover while increasing safety and reducing expense. The subsurface lubricator includes a bi-directional packoff tool on its bottom end. Short hydraulic cylinders lubricate the subsurface lubri...	09/08/2009
7584797	Method of subsurface lubrication to facilitate well completion, re-completion and workover 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...	09/08/2009

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Assignee: Stinger Wellhead Protection, Inc.