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| Number | Title | Issue Date |
| 8123226 | Seal assembly A seal assembly for sealing an annular space between an inner and an outer pipe in a double-walled subsea pipeline which seal assembly comprises an annular member (1) and moveable blocking means (2, 3) and: (a) under normal operating conditions is in a... | 02/28/2012 |
| 7959155 | Packer cup A packer cup for sealing the interior of a pipe under pressure includes a first region of relatively soft material and a second region of relatively hard material. The region of the relatively softer material would begin at the lip of the cup and extend for at least... | 06/14/2011 |
| 7380592 | Pressure control tool for modluating pressure in a portion of a wellbore A pressure control device for mounting on a mandrel includes a flexible cup member, a rigid support member and an anti extrusion portion of greater hardness than the cup member located at an outer portion of the cup member. The cup member is bonded only to selected ... | 06/03/2008 |
| 7328742 | Seal cup for a wellbore tool and method A seal cup and method is disclosed that can be used on a wellbore tool. The seal cup includes an external circumferential seal land adjacent the cup lip and an outer surface capable of permitting drainage away from the seal land of fluids, which may seep past the se... | 02/12/2008 |
| 7278477 | 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... | 10/09/2007 |
| 7278494 | Stripper rubber insert assembly A high-pressure stripper rubber provides inserts and support members that cooperatively support the profile of the rubber against elastic deformation. The inserts dynamically cooperate to resist elastic deformation of the rubber due to down hole pressure. The stripp... | 10/09/2007 |
| 7261153 | Packer cups A packer cup for use in sealing the interior of a pipe under pressure is described. The cup uses a bell-shaped end which has a lip of softer material which is integral with the body of the cup which is harder material. Under pressure the lip expands against the side... | 08/28/2007 |
| 7243733 | Cup tool for a high-pressure mandrel and method of using same A cup tool includes a cup tool tube having a threaded upper end for connection to a high-pressure mandrel. The cup tool has an outer surface over which an elastomeric cup is slidably mounted for movement from an unset position for entry into a wellbore to a set posi... | 07/17/2007 |
| 7240727 | Armored stripper rubber An armored stripper rubber is provided that protects the drillstring bore of the stripper rubber from substrate infiltration, yet pivotally dilates to facilitate the passage of drillstring components through the bore while effectively maintaining a fluid-tight seal.... | 07/10/2007 |
| 7178588 | Flexible cup for downhole devices An improved cup and method for making same for use on a “pig” or any other down hole equipment for engaging the wall of a pipe line, which comprises an inner metal sleeve portion; a metal shoulder portion extending outward from the sleeve around its perimeter ex... | 02/20/2007 |
| 7059410 | Method and system for reducing longitudinal fluid flow around a permeable well A method for reducing longitudinal flow of fluids through an annular space surrounding a permeable well tubular, such as a slotted liner or a sandscreen, in an inflow region of an oil and/or gas production well having: arranging a series of collapsed resilient seali... | 06/13/2006 |
| 6668938 | Cup packer An improved cup packer for use on wellbore tools is disclosed. The open end of the cup packer bore is filled with an elastomer to prevent the intrusion of sand and debris into the space between the cup packer and the wellbore tool on which it is mounted. ... | 12/30/2003 |
| 6443458 | Packer A packer comprises an elastomeric member (2) which, in use, will deform radially when subjected to axial pressure. A plurality of steel fingers (3, 4) are vulcanized onto the elastomeric member (2). One end of each steel finger (3, 4) is accomodated in a ... | 09/03/2002 |
| 5997003 | Annular sealing assembly and methods of sealing Methods and apparatus are described for improved sealing across an annular space between facing sealing surfaces. Methods for mechanically setting and pressure energizing sealing ring assemblies are also described. In one aspect, several sealing ring asse... | 12/07/1999 |
| 4751870 | Seals for gas and oil well swabs Seal for maintaining gas-tight contact between casing wall and, particularly, automatic well swabs. The seal includes an upper portion containing a reinforcing tube and being minimally less in diameter than the casing interior, a tapering midsection and a... | 06/21/1988 |
| 4638726 | Load bearing swab cup An improved reinforcement cage assembly for use in the manufacture of a load lifting swab cup wherein the swab cup includes an elastomeric material bonded to the reinforcement cage assembly. The reinforcement cage assembly includes a metal base assembly a... | 01/27/1987 |
| 4528896 | Dynamic seals for gas and oil well swabs Gas and oil well swabs, particularly a dynamic seal for maintaining gas-tight contact between the moving swab and the well casing. The seal includes a reinforcing tube and a flexible annulus having an upper throat portion complementally engaging the exter... | 07/16/1985 |
| 4424865 | Thermally energized packer cup In a geothermal production well, oil well or gas well, a thermally energized packer cup having a tapered elastomer body and a reinforcing element fabricated from a shape memory alloy seals the well casing when the packer cup is heated to the transformatio... | 01/10/1984 |
| 4329916 | Packer nose assembly A packer nose assembly for pumping downhole equipment of the free type into and out of a tubing string located within a borehole. The assembly includes a mandrel having a lower end portion attachable to the downhole equipment and an upper end portion term... | 05/18/1982 |
| 4315543 | Seal system for wellhead isolation tool diffuser A seal system for a wellhead isolation tool diffuser utilizing elastomeric cup-shaped seals installed on the exterior of the diffuser, which is inserted into the production tubing at the wellhead. After insertion of the diffuser, the production tubing is ... | 02/16/1982 |
| 4265459 | Swab cup reinforcing member support A well swab cup has an annular bushing for supporting a plurality of longitudinally extending reinforcing members within an elastomeric cup like body. The reinforcing members are supported around the periphery of the bushing and extend upward to a mid-por... | 05/05/1981 |
| 4254962 | Swab cup having long and short reinforcing members A well swab cup has an annular bushing for supporting a plurality of longitudinally extending wire reinforcing members within an elastomeric cup like body. The reinforcing members are supported in a base cup around the lower portion of the bushing and ext... | 03/10/1981 |
| 4162079 | Resilient packing ring and assembly A packing ring of resilient material for down hole sealing of oil well casing against high fluid pressure. The ring is in the general form of a U cup with inner and outer lips. The outer lip is relatively thick and has an outer corner rounded to a large r... | 07/24/1979 |
| 4149566 | Elastomeric test cup for tubing pressure testing A test cup for pressure testing tubing comprising an elastomeric sleeve having a belled end, and further including an axially extending tubular portion positioned concentrically within the belled end and defining therewith a fluid-receiving cavity. The tu... | 04/17/1979 |
| 4129308 | Packer cup assembly A packer cup assembly useful on tubing at high temperatures and includes a special sealing element having a frangible back up portion to provide pack off in a well.... | 12/12/1978 |
| 4099451 | Oilwell swab cup An oilwell swab cup is formed by clamping a plurality of vertical wire members in a circular U-shaped cup and molding an elastomeric material around the wires and cup.... | 07/11/1978 |
| 4081185 | Oil well swab cup An oil well swab cup with improved wear characteristics utilizes a single integral reinforcing structure featuring a wear surface forming a substantial portion of the external surface of the cup.... | 03/28/1978 |
