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| Number | Title | Issue Date |
| 7409999 | Downhole inflow control device with shut-off feature A system and method for controlling inflow of fluid into a production string. In aspects, the invention provides a downhole sand screen and inflow control device with a gas or water shut-off feature that can be operated mechanically or hydraulically from the surface... | 08/12/2008 |
| 7350598 | Downhole tool A downhole tool for use within a well comprising a body having an external diameter smaller than the diameter of the well so as to form an annular gap between the body and the interior surface of the well. A first downhole fluid passage having an upper inlet and a l... | 04/01/2008 |
| 7308943 | Well operations system A wellhead has, instead of a conventional Christmas tree, a spool tree in which a tubing hanger is landed at a predetermined angular orientation. As the tubing string can be pulled without disturbing the tree, many advantages follow, including access to the producti... | 12/18/2007 |
| 7299880 | Surge reduction bypass valve Methods and apparatus are provided for reducing surge pressure while running casing into a wellbore. The apparatus includes a running string for running casing having a diverter tool therein. The diverter tool has one or more bypass ports between its upper and lower... | 11/27/2007 |
| 7284619 | Packer with positionable collar A fluid actuated packer 10 and collar 36 assembly is provided for positioning on a tubular member 12. The collar 36 is moveable by a running tool 110 positioned within the tubular member and has a closed position and a packer activ... | 10/23/2007 |
| 7275591 | Tubing hanger with ball valve in production string The invention provides a wellhead assembly including a wellhead housing supporting a tubing hanger within its central bore and forming a housing stem port through its outer wall to the central bore. The tubing hanger has a side stem port formed through its body inte... | 10/02/2007 |
| 7252152 | Methods and apparatus for actuating a downhole tool The present invention relates to apparatus and methods for remotely actuating a downhole tool. In one aspect, the present invention provides an apparatus for activating a downhole tool in a wellbore, the downhole tool having an actuated and unactuated positions. The... | 08/07/2007 |
| 7234518 | Adjustable well screen assembly An adjustable well screen assembly having a sand screen which is wrapped around a perforated base pipe and a perforated sleeve which is movably disposed concentrically inside the base pipe between a first, closed, and a second, open, position. In the first position ... | 06/26/2007 |
| 7231970 | Non-rotational casing hanger and seal assembly running tool A non-rotational casing hanger and seal assembly running tool for use in oil and gas drilling operations has a mandrel and a tool body that is carried by the mandrel. The tool body supports a plurality of latching segments for releasably connecting the tool body to ... | 06/19/2007 |
| 7201232 | Washpipeless isolation strings and methods for isolation with object holding service tool An isolation string having an upper packer and an isolation pipe in mechanical communication with the upper packer, the isolation pipe comprises an operable valve and an object activated valve. An object holding service tool is adapted to release an object to activa... | 04/10/2007 |
| 7198109 | Double-pin radial flow valve A valve with the following components: a pipe; an inner sub connected to the pipe; an outer sub connected to the pipe, wherein the inner and outer subs are concentric and define a sub annulus; a conduit between the sub annulus and an inside diameter of the inner sub... | 04/03/2007 |
| 7124824 | Washpipeless isolation strings and methods for isolation An isolation string having: an upper packer; and an isolation pipe in mechanical communication with the upper packer, wherein the isolation pipe comprises a pressure activated valve and an object activated valve. A method having: running-in an isolation string on a ... | 10/24/2006 |
| 7055611 | Plug-dropping container for releasing a plug into a wellbore A plug-dropping container used for releasing plugs or other objects into a wellbore during fluid circulation procedures. In one aspect, the plug-dropping container is used as part of a cementing head. The plug-dropping container comprises an elongated housing, and a... | 06/06/2006 |
| 7055596 | Packer releasing methods Methods of releasing a well tool set in a wellbore are provided. In various embodiments, a well tool, such as a packer, is released from sealing and gripping engagement within a wellbore using alternate methods. A dual-string packer is described in which the packer ... | 06/06/2006 |
| 6966381 | Drill-through spool body sleeve assembly A drill-through spool body sleeve assembly comprises a test sleeve removably installed within a drill-through spool body having a bore with the terminal ends of the outer diameter of the test sleeve sealingly engaging the bore wall. The sleeve assembly also comprise... | 11/22/2005 |
| 6951331 | Sleeve valve for controlling fluid flow between a hydrocarbon reservoir and tubing in a well and method for the assembly of a sleeve valve A sleeve valve for fluid flow between a hydrocarbon reservoir and a well includes a first sleeve and a second sleeve which are relatively movable between a first position in which at least one opening in the first sleeve is aligned or misaligned with at least one op... | 10/04/2005 |
| 6880638 | Device for an opening in an outer sleeve of a sleeve valve and a method for the assembly of a sleeve valve A sleeve valve for fluid flow between a hydrocarbon reservoir and a well including a fixed outer sleeve with openings and a movable inner sleeve with openings which can be aligned and misaligned with the outer sleeve openings in order to admit or shut off the fluid ... | 04/19/2005 |
| 6776240 | Downhole valve A valve for downhole well service, having a rotary indexer carrying an elastically-loaded valve element on a valve seat surface in a flow passage, the valve element adapted to obstruct one or more flow passages in the valve seat surface when aligned therewith. The v... | 08/17/2004 |
| 6494264 | Wellbore flow control device One embodiment of the present invention provides a multilateral production system. The production system has one or more flow control valves for controlling flow from the one or more lateral bores, and has a main flow control valve for controlling flow fr... | 12/17/2002 |
| 6450255 | Downhole flow control devices Several downhole flow control devices are disclosed which are meterable and are also capable of shutting of a particular zone in a well. The several embodiments include a multiple valve body, a toroidal inflatable valve, and a series of related choke syst... | 09/17/2002 |
| 6419023 | Deviated borehole drilling assembly An assembly for formation and completion of deviated wellbores is disclosed which includes a toolguide and a casing section which can be used together or separately. The toolguide includes a lower orienting section and a whipstock having a sloping face, c... | 07/16/2002 |
| 6343650 | Test, drill and pull system and method of testing and drilling a well A test, drill and pull system for testing a well formation or zone of interest and further drilling of the well in a single trip into the wellbore. The system includes a surface readout tester valve, a rotation-operated reversing valve, a resettable packe... | 02/05/2002 |
| 6293517 | Ball valve having convex seat A valve includes a valve ball and a convex metal valve seat ring that abut along a circle in a metal-to-metal seal. At very high contact forces, the valve ball and/or the valve seat elastically deform to increase the contact area between them and thereby ... | 09/25/2001 |
| 6276386 | Charging device for hydraulic systems There is described herein an apparatus for charging a fluid line through a coupler such as a penetrator. The apparatus comprises a body formed from a sidewall defining a bore positioned along the longitudinal axis and extending therethrough. The first end... | 08/21/2001 |
| 6182762 | Storm valve A method and apparatus for temporarily storing the lower portion of a string of drill pipe in a well which has a cased portion wherein a packer, installed between a storm valve located below the packer and an actuator located above the packer, is set in t... | 02/06/2001 |
| 6059036 | Methods and compositions for sealing subterranean zones The present invention provides methods and compositions for sealing subterranean zones. The methods of the invention basically comprise the steps of preparing a sealing composition comprised of an aqueous alkali metal silicate solution, a gelling agent an... | 05/09/2000 |
| 5996687 | Full bore variable flow control device A variable flow control device having a substantially cylindrical housing with a valve element connected to an inner surface thereof. The valve is movable between an open position and a closed position in the bore. One or more flow control orifices are lo... | 12/07/1999 |
| 5960874 | Apparatus for remote control of multilateral wells A method and apparatus for selectively producing fluids from multiple lateral wellbores that extend from a central wellbore. The apparatus comprises a fluid flow assembly with a selectively openable and adjustable flow control valve in communication with ... | 10/05/1999 |
| 5918676 | Horizontal tree safety valve A safety valve for use with horizontal subsea trees as described which uses a two-part (10, 12) safety valve system. The first part (10) containing a valve mechanism (16, 18, 22, 26) remains in the wellhead and is normally biased to a closed position. The... | 07/06/1999 |
| 5890541 | BOP isolation test tool A test tool having a body, a mandrel, a ball valve with an actuating mechanism and a bore is lowered on a string of drill pipe and landed in a wellhead housing. A retainer ring with internal threads is carried by the mandrel and engages threads on the bod... | 04/06/1999 |
| 5697449 | Apparatus and method for temporary subsurface well sealing and equipment anchoring A retrievable packoff assembly for temporarily sealing a well pipe and anchoring equipment at a subsurface location within the pipe. The assembly is connected to a tubular actuation tool which is manipulated from the surface to position the assembly at a ... | 12/16/1997 |
| 5575336 | Safety valve for horizontal tree A safety valve for use in a horizontal christmas tree is disclosed which comprises a valve element rotatably mounted in a valve body for opening and closing a flow path through the valve body. A seal is provided between the valve body and valve element an... | 11/19/1996 |
| 5314026 | Landing nipple A safety valve landing nipple selectively provides a pin for closing communication in the bore between the first control line and the safety valve control line so that communication between the first control line and an insert safety valve in the landing ... | 05/24/1994 |
| 5314014 | Packer and valve assembly for temporary abandonment of wells Preferential disconnection of a valve-actuating subassembly from a temporary abandonment safety valve and packer assembly is provided by stops which limit relative rotation between the valve-actuating subassembly within the valve along with a locking coll... | 05/24/1994 |
| 5305988 | Valves having involute sealing surfaces Two embodiments of a metal valve, each having a body with flow passages and curved internal sealing surfaces and a valve member with a flow passage and external curved sealing surfaces. Both the body and valve member sealing surfaces are curved as a porti... | 04/26/1994 |
| 5253712 | Rotationally operated back pressure valve A rotationally operated back pressure valve includes a flapper valve with a sliding stinger tube located thereabove in a housing. An operating mandrel has a lower end portion received in a bore of the housing and the operating mandrel extends upward out o... | 10/19/1993 |
| 5226483 | Safety valve landing nipple and method A safety valve landing nipple selectively provides communication between a surface control line and the internal bore of said landing nipple by use of a rotary member. A rotary shifting tool is used to rotate the rotary member so that a cutting means shea... | 07/13/1993 |
| 5188181 | Annulus shutoff device for a subsea well A subsea well assembly utilizes outer, intermediate, and inner wellhead housings. The inner wellhead housing has a port extending through it that communicates the annulus with the bore of the inner wellhead housing. A sleeve mounts to the inner wellhead h... | 02/23/1993 |
| 5165492 | Apparatus for preventing separation of a down-hole motor from a drill string An apparatus is disclosed for use in a drill string 10 to prevent separation of a lower tubular member 16 from an upper tubular member 15 by a rotational force applied from a down-hole motor 22. The down-hole motor 22 is rotated by drilling fluid pumped f... | 11/24/1992 |
| 5137087 | Casing cementer with torque-limiting rotating positioning tool A casing cementer with torque-limiting rotating positioning tool. The casing cementer comprises a housing with a rotating valve sleeve therein. A positioning tool is used to rotated the valve sleeve between open and closed positions thereof. No recipricat... | 08/11/1992 |
