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| Number | Title | Issue Date |
| 7610958 | Downhole actuation tool Disclosed herein is a device that relates to an actuator comprising a plurality of individual piston chambers pressurized by a common pressure source. A plurality of pistons are in operable communication with the piston chambers, the pistons each being in operable c... | 11/03/2009 |
| 7438135 | Method of suspending, completing and working over a well Methods are provided in which reliance is placed on a first and second barrier respectively positioned in a well 10 to provide well control during well suspension, completion and/or workover operations. Each of the barriers is below the depth of the lowermost... | 10/21/2008 |
| 7431079 | Retrievable oil and or gas well blowout preventer A well blowout prevention apparatus that can be inserted into the well bore of a subterranean well, to confine fluid in the well when the fluid experiences or exerts a pressure surge, is described. Methods of using the well blowout prevention apparatus are also desc... | 10/07/2008 |
| 7428928 | Sealing spring mechanism for a subterranean well A technique includes deploying a spring downhole, energizing the spring and using the energized spring to form an annular barrier in the well. The spring may be energized prior to being run downhole or after being run downhole, depending on the particular embodiment... | 09/30/2008 |
| 7367404 | Tubing seal A method of forming a seal between two tubular members comprising providing a first tubular member having an internal surface and an external surface describing a first diameter, with a recess in the external surface at a seal portion of the first tubular member. A ... | 05/06/2008 |
| 7350569 | Separable plug for use in a wellbore The invention generally relates to an apparatus and a method for conveying and operating tools in a wellbore. In one aspect, a method of performing an operation in a wellbore is provided. The method includes running a selectively separable plug member accommodating ... | 04/01/2008 |
| 7347289 | Dart-operated big bore by-pass valve A by-pass tool is provided which has a large bore throughflow passage when in an inactive drilling mode, and which is capable of being activated upon launching of an activation dart from the surface, to an active mode in which drillstring fluids can be diverted to a... | 03/25/2008 |
| 7341111 | Expandable bridge plug and setting assembly Bridge plug and setting assembly may be used in a well with a tubular therein to control flow through the tubular. A plurality of fluid powered units 16, 24 are suspended in a well from a work string 14 for exerting a driving force. A plug member 50... | 03/11/2008 |
| 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 |
| 7299882 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 11/27/2007 |
| 7290603 | Downhole plug Downhole plug, especially designed for closing an annular conduit in an oil or gas well, under high pressure and temperature. It has two radially expandable ring elements 13, 15, which are arranged on a carrying cylindrical element 32, between two mutu... | 11/06/2007 |
| 7273110 | Sealing element for pipes and methods for using A sealing device for shutting down a pipe, comprising an expandable cylindrical sleeve (1), which is designed with a conical interior, and is provided with radially through-going slots (3) extending in the sleeve's longitudinal direction from each of t... | 09/25/2007 |
| 7252142 | Annular isolators for expandable tubulars in wellbores The present disclosure addressed apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. Annular seal means are carried in or on production tubing as it is run into a borehole. In conjunction with expansion of the... | 08/07/2007 |
| 7243730 | Well production optimizing system A well optimizing system and method for lifting fluid that accumulates and retards production in a well. The system includes a plunger having a piston and a detachable plugh. The piston has a sealing section and a retrieval end and defines a passage through the leng... | 07/17/2007 |
| 7216706 | Annular isolators for tubulars in wellbores The present disclosure addresses apparatus and methods for forming an annular isolator in a borehole after installation of production tubing. A first deployable annular isolator is carried on tubing as it is positioned in a borehole. An annular isolator forming mate... | 05/15/2007 |
| 7182142 | Downhole apparatus Apparatus (10) for facilitating coupling and cementing of downhole tubulars (12, 28) comprises a tubing section (12, 10) for use in lining a bore. The tubing section has upper and lower ends and defines a tubing wall having cement outlets (20... | 02/27/2007 |
| 7172027 | Expanding tubing A method of expanding tubing downhole comprises providing a section of expandable tubing of a first diameter, and axially compressing the tubing to induce buckling, such that the buckled portion describes a larger second diameter. The resulting diametric expansion m... | 02/06/2007 |
| 7172028 | Reciprocating slickline pump A reciprocating hydraulic slickline pump for use in a wellbore. The pump comprises a pump member. The pump member is reciprocated axially by slickline in order to form an upstroke and downstroke. The pump is configured such that it pressurizes fluid within a workstr... | 02/06/2007 |
| 7168497 | Downhole sealing A method of providing a downhole seal, such as a packer, in a drilled bore between inner tubing and outer tubing comprises: providing an intermediate tubing section defining a seal arrangement for engaging with the inner tubing; and radially plastically deforming th... | 01/30/2007 |
| 7163066 | Gravity valve for a downhole tool A gravity valve for a downhole tool for use in a subterranean well and a method of use thereof. The gravity valve is adapted to control the flow of a dowuhole fluid through the downhole tool. The gravity valve typically includes a plunger and a seat. The plunger may... | 01/16/2007 |
| 7111677 | Sand control for blanking plug and method of use A blanking plug device, system and method of use, wherein the plug device has an anchoring portion for securing the blanking plug device within a tubing string or other well conduit. In preferred embodiments, the anchoring portion comprises a locking device such as ... | 09/26/2006 |
| 7104323 | Spiral tubular tool and method An expandable device for use in tubulars. The device comprises an outer tubular having a series of slots therein, with the slots being arranged about the exterior of the outer tubular. The device further includes an inner tubular disposed within the outer tubular, a... | 09/12/2006 |
| 7096938 | Slip energized by longitudinal shrinkage A slip for an expanding hanger or patch is disclosed. The slip is mounted over the hanger body and has an internal profile that nests within a mating profile on the exterior of the hanger. When a compressive force is applied to the hanger, it shrinks longitudinally ... | 08/29/2006 |
| 7096948 | Method and multi-purpose apparatus for dispensing and circulating fluid in wellbore casing A multi-functional apparatus and method for drilling fluid and cementing operations to set casing in a wellbore for use on either top drive or rotary type rigs. The apparatus and method includes a fill-up and circulating tool, a cementing head assembly, and a wiper ... | 08/29/2006 |
| 7090004 | Cement float A cement float for use in a wellbore tubing string includes: a mandrel having a bore extending from a first end to a second end including a fluid flow control device therein, and outer surfaces defining a tapering outer diameter from the first end to the second end;... | 08/15/2006 |
| 7073583 | Method and apparatus for expanding tubing downhole Aspects of the invention relate to apparatus and methods for remedial and repair operations downhole. Certain embodiments of apparatus include a lightweight expandable member (22) that can be radially expanded to increased its inner and outer diameters using ... | 07/11/2006 |
| 7059407 | Method and apparatus for stimulation of multiple formation intervals The invention discloses methods of, as well as apparatus and systems for, perforating and treating multiple intervals of one or more subterranean formations intersected by a wellbore by deploying within said wellbore a bottom-hole assembly (“BHA”) having a perfo... | 06/13/2006 |
| 7028585 | Wrenching tong Apparatus for applying torque to a first tubular relative to a second tubular, the apparatus comprising a first tong for gripping the first tubular and a second tong for gripping the second tubular, wherein the first tong is provided with teeth around a peripheral s... | 04/18/2006 |
| 7028586 | Apparatus and method relating to tongs, continous circulation and to safety slips A tong system includes an upper tong having grips for gripping a tubular and a rotation mechanism to rotate the grips and the tubular. A lower tong also has grips and a rotation mechanism to rotate the grips to provide rotation to a lower tubular, such that the uppe... | 04/18/2006 |
| 7004257 | Apparatus and methods for separating and joining tubulars in a wellbore The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubula... | 02/28/2006 |
| 6997266 | Expandable hanger and packer A first tubular is disposed coaxially within a portion of a second, larger tubular. A portion of the first tubular is expanded into frictional contact with the second tubular, thereby creating a liner and a hanger. In one embodiment, a pattern of grooves and profile... | 02/14/2006 |
| 6976539 | Tubing anchor A method of installing a liner in a drilled bore below a section of bore previously lined with casing comprises the steps of: running a length of liner into the bore such that at least an upper end of the liner is positioned in overlapping relation with at least a l... | 12/20/2005 |
| 6971450 | Completion apparatus and methods for use in wellbores An apparatus and methods for preventing the accumulation of unwanted materials in an enlarged inner diameter portion of a casing or housing. In one aspect of the invention, a sleeve is disposed in the housing to isolate an annular area defined by the outer surface s... | 12/06/2005 |
| 6964306 | Manifold device and method of use for accessing a casing annulus of a well A manifold device connects in series between the wellhead and the outer casing of a well for providing access to the outer casing of the well without removing the wellhead. The device includes a tubular body for receiving the tubing string of the well therethrough. ... | 11/15/2005 |
| 6963792 | Surgical method A teleoperator system with telepresence is shown which includes right and left hand controllers (72R and 72L) for control of right and left manipulators (24R and 24L) through use of a servomechanism that includes computer. The teleoperato... | 11/08/2005 |
| 6959759 | Expandable packer with anchoring feature An expandable packer or anchor is disclosed. It features a gripping device integral to or mounted in a sleeve over the mandrel and mating undulating surfaces to help maintain grip under changing load conditions. Upon expansion, pressure on a sealing element is enhan... | 11/01/2005 |
| 6935432 | Method and apparatus for forming an annular barrier in a wellbore In accordance with the present invention, an apparatus and method are provided which utilize an expandable media assembly to create an annular barrier in a subterranean well. The apparatus comprises a tubing assembly for placement in the wellbore, the tubing assembl... | 08/30/2005 |
| 6932161 | Profiled encapsulation for use with instrumented expandable tubular completions The present invention provides an encapsulation for housing instrumentation lines, control lines, or instruments downhole. In one use, the encapsulation resides between an expandable downhole tool, such as an expandable sand screen, and the wall of the wellbore. The... | 08/23/2005 |
| 6923261 | Apparatus and method for expanding a tubular A method of isolating a section of downhole tubing comprises: running a length of expandable tubing (20) into a tubing-lined borehole (12, 14) and positioning the expandable tubing (20) across a section of tubing to be isolated; deforming at lea... | 08/02/2005 |
| 6896063 | Methods of using downhole polymer plug Disclosed is a method of either plugging or lining a wellbore or casing using a polymer member into which stored energy or shape memory has been introduced. The shape memory is introduced into the member by reducing its diameter, such as by compressing the member us... | 05/24/2005 |
