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| Number | Title | Issue Date |
| 7270190 | Variable size coil tubing gripping elements A variable ram for coiled tubing comprises a pair of opposing rams, each ram having a ram body with a vertical channel formed therein; a pair of opposing pins within each ram head, the pins extending into the channel; and a toothed gripper having a hole therein size... | 09/18/2007 |
| 7195224 | Blowout preventer and locking mechanism A blowout preventer having a main body, a ram system with ram apparatus, a movement system with movable shaft apparatus connected to the ram apparatus, the ram apparatus movable from a first open-ram position to a second closed-ram position, the movable shaft appara... | 03/27/2007 |
| 7188683 | Drilling method A system and method is disclosed for continuously supplying drilling fluid down a bore hole while adding or removing tubulars. ... | 03/13/2007 |
| 7137610 | Wellhead production blowout preventer The invention broadly provides a ram incorporating a thermoplastic seal for sealing in the horizontal bore of a wellhead production blowout preventer to close off the vertical bore of the well, the ram being adapted to seal at its front end against either a polish r... | 11/21/2006 |
| 7051990 | Blowout preventer and movable bonnet support A blowout preventer which, in certain aspects, has a main body with a main top, a main bottom, and a main bore therethrough from the main top to the main bottom, at least one bonnet releasably secured to the main body, the at least one bonnet containing movable ram ... | 05/30/2006 |
| 7051989 | Blowout preventer and movable ram block support A blowout preventer which, in certain aspects, has a main body and ram block holding apparatus releasably secured to and movable with respect to the main body and/or to a door or bonnet, movable ram apparatus within the body including a ram block, the ram block hold... | 05/30/2006 |
| 7044430 | Lock bars for blowout preventer Lock bars for blowout preventers and blowout preventers having, in certain aspects, a body with a top, a bottom, and a bore therethrough, at least one bonnet releasably secured to the body, a first lock bar recess defined by a first portion in the body and a second ... | 05/16/2006 |
| 7021633 | Low friction fluid seal device with additive to rubber compound A fluid seal device for use in sealing an annular space between an internal surface of a cylinder and a member therein having an outer cylindrical surface and being formed at least in part from rubber. An oleamide additive is included in the rubber compound comprisi... | 04/04/2006 |
| 7017881 | Blowout preventer ram packer and wear insert A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert having shoulders on the insert surfaces that are relieved. By relieving th... | 03/28/2006 |
| 6974135 | Variable bore ram A ram type blowout preventer includes variable ram packers for sealing about tubulars of different outside diameters in the bore of the preventer housing or about a single tubular having a variable outside diameter. Each ram packer includes a body of elastomeric mat... | 12/13/2005 |
| 6969042 | Blowout preventer and ram actuator A blowout preventer with a main body; a base releasably connected to the main body, the base having a base space therein, the base having a ram shaft opening; a primary piston movably disposed within the base space; a ram shaft to which the primary piston is connect... | 11/29/2005 |
| 6955357 | Extended range variable bore ram packer for a ram type blowout preventer A variable bore ram packer including a ram body, a top seal and a packer member designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The packer member is molded of an elastomeric material having a central se... | 10/18/2005 |
| 6857634 | BOP assembly with metal inserts A blowout preventer assembly 10 includes opposed rams 12, 14, each including a rubber or elastomer sealing assembly 16, 18, with a plurality of inserts 20 forming an array 22 of metal inserts within each sealing assembly. Each inse... | 02/22/2005 |
| 6845959 | Quick release blowout preventer bonnet A bonnet lock mechanism for a blowout preventer including an angled surface disposed in the blowout preventer, a latching dog having a tapered surface disposed in the bonnet, and a lock actuator operatively coupled to the latching dog. The the lock actuator is adapt... | 01/25/2005 |
| 6676103 | Wireline centralization apparatus and method An apparatus (10, 50) for moving an elongate member (102) (such as a wireline (102)) which passes through a throughbore (70, 97) of a valve device such as a wireline valve used in the hydrocarbon production industry is provided. The apparatus includes an ... | 01/13/2004 |
| 6554247 | Quick release blowout preventer bonnet A bonnet lock mechanism for a blowout preventer that includes a radial lock. A radial lock displacement device is coupled to at least one lock actuator. The radial lock displacement device is adapted to radially displace the radial lock to lock a bonnet t... | 04/29/2003 |
| 6394460 | One-piece ram element block for wireline blowout preventers Ram seal units for attachment to the rams of blowout preventers incorporate an integral ram seal block having a central web, with a parallel rectangular elastomer support plates extending from opposite sides of the integral ram seal block. The central web... | 05/28/2002 |
| 6367804 | Variable bore ram packer for tapered tubular members in a ram type blowout preventer A variable bore ram packer designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The variable bore ram packer is molded of an elastomeric material having a central semi-circular opening sized to fi... | 04/09/2002 |
| 6296225 | Ram bore profile for variable bore packer ram in a ram type blowout preventer An improved ram bore profile for use with a variable bore ram packer designed for use in a standard ram-type blowout preventer used in oil and gas drilling operations is disclosed. The improved ram bore profile in the ram body is a substantially U shaped ... | 10/02/2001 |
| 6164619 | Bi-directional sealing ram A shuttle valve assembly in a ram-type BOP selectively connects the volume behind the rams to the more highly pressurized wellbore volume adjacent to the rams (either above or below the rams). The connection made is free flowing in both directions (no che... | 12/26/2000 |
| 5906375 | Rubber riveting of molded parts A combination of a rubber or other elastomer part and a plastic or metal part is bonded by both chemical and mechanical means. The mechanical means is in the form of molded rivets integrally manufactured in the molding process as part of the elastomer. Ap... | 05/25/1999 |
| 5860478 | Sub-sea test tree apparatus Apparatus and a method for killing a live well after activation of a well blowout preventer is described. This is achieved by providing apparatus in the form of a shear or kill sleeve (34) in a string (26) above a sub-sea test tree and which is located be... | 01/19/1999 |
| 5713581 | Fibrous seal for blowout preventer A high pressure seal material, such as for a lateral "T" seal of a shear ram blowout preventer, is disclosed wherein the seal material is preferably nitrile rubber and includes uniformly dispersed synthetic, non-cellulosic fibers in parallel alignment to ... | 02/03/1998 |
| 5603481 | Front packer for ram-type blowout preventer A ram-type blowout preventer (10) has a front packing arrangement (24) with a packer assembly (28) therein. Packer assembly (28) includes an elastomeric packer member (30) and a recess (46) defined between plates (32) and (34) adjacent elastomeric packer ... | 02/18/1997 |
| 5360061 | Blowout preventer with tubing shear rams An improved shearing blowout preventer having improved shearing rams for shearing a tubing string extending through the bore of the preventer body. The shear rams include a shear ram having an upper shear blade and a ram having a lower shear blade. The up... | 11/01/1994 |
| 5294088 | Variable bore packer for a ram-type blowout preventer The variable bore packer for a ram-type blowout preventer includes a body of resilient packing material with upper and lower plates embedded in the upper and lower surfaces of the body and upper and lower sets of insert segments disposed adjacent the uppe... | 03/15/1994 |
| 5255890 | Ram type blowout preventer There is disclosed a ram type blowout preventer wherein the outer ends of guideways radiating from the bore of the body to receive the rams are closed by bonnets bolted to the body and sealed with respect to the body by a seal assembly received in a reces... | 10/26/1993 |
| 5251870 | Blowout preventer ram packer and wear insert A ram packer for a hydraulic blowout preventer is provided that includes a steel reinforced hard elastomeric body which has a recess in the packer face for receiving a replaceable wear insert. The wear insert includes a substantially square insertion surf... | 10/12/1993 |
| 5180137 | Ram type blowout preventer having improved ram front packings There is disclosed a ram type blowout preventer with rams having ram front packings disposed within a recess extending across the front face of each ram body and including a seal strip of elastomeric material, metal plates above and below the strip of ela... | 01/19/1993 |
| 5165704 | Blowout preventer bonnet seal carrier A sealing structure for sealing between substantially aligned cylindrical surfaces including a seal carrier having a tubular body with external sealing ring grooves spaced apart so that sealing rings positioned in said grooves engage the cylindrical surfa... | 11/24/1992 |
| 5127623 | Inner seal for ram-type blowout preventer An inner seal assembly for a pair of opposed ram bodies (12, 14) of a ram-type blowout preventer (10) includes an elastomeric packer (22) and a resilient insert (23). Resilient insert (23) has a plurality of lugs (58) which fit within indentations (36) in... | 07/07/1992 |
| 5125620 | Ram type blowout preventer having improved ram front packing There is disclosed a ram type blowout preventer whose rams have ram front packings which include seal strips of elastomeric material and top and bottom metal plates received in recesses across the front ends of the ram bodies, with the faces of the inner ... | 06/30/1992 |
| 5064164 | Bop seal with improved metal inserts A blowout preventer is provided with an improved sealing assembly for sealing engagement with a pipe extending through the blowout preventer into a well bore. The sealing assembly includes an elastomeric seal and a plurality of circumferentially spaced me... | 11/12/1991 |
| 5044603 | Variable bore ram rubber with non-overlapping inserts An improved sealing device for variable bore ram blowout preventers of the type that uses a pair of opposed semi-cylindrical ram blocks to urge a pair of resilient sealing elements into sealing circumferential contact with the circumferential surface of a... | 09/03/1991 |
| 5044602 | Blowout preventer A blowout preventer for use on wells and especially adapted to use on a pumping well during a steam flood operation including an upper housing having oppositely disposed rams for extension and retraction between the sealing and non-sealing with a longitud... | 09/03/1991 |
| 5013005 | Blowout preventer A blowout preventer with a body having a central bore and aligned, opposed guideways extending outward from said central bore, a ram in each of said guideways, means for moving the rams in the guideways, each ram having a ram body with a pair of vertical ... | 05/07/1991 |
| 5011110 | BOP seal with improved metal inserts A blowout preventer is provided with an improved sealing assembly for sealing engagement with a pipe extending through the blowout preventer into a well bore. The sealing assembly includes an elastomeric seal and a plurality of circumferentially spaced me... | 04/30/1991 |
| 5005802 | Variable bore packer for a ram type blowout preventer A packer for use with a ram-type blowout preventer which has the capacity to accommodate a plurality of sizes of tubular members extending through the bore of the blowout preventer, the packer having a resilient body to fit the face recess of the ram and ... | 04/09/1991 |
| 4986511 | Seal structure for elevated temperature service A seal comprises a sandwich of a soft, low modulus resinous layer between two outer layers of harder, high modulus resinous material to provide an effectve high pressure seal at both low and high temperatures. The seal can be used in well head service, e.... | 01/22/1991 |
| 4938290 | Wireline blowout preventer having mechanical and hydraulic sealing A single ram unidirectional wireline BOP system is provided having both mechanical and hydraulic sealing capability. A BOP body having a vertical flow passage and intersecting horizontal ram passages includes a single pair of opposed rams and appropriate ... | 07/03/1990 |
