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| Number | Title | Issue Date |
| 7490676 | Method and system for tubing a borehole in single diameter The invention concerns a method for casing a borehole which consists of successively lowering an unlimited plurality of strings of casing having a common diameter, the next one through the preceding one, to be installed one beneath the other and being sealingly conn... | 02/17/2009 |
| 7441607 | Circulation tool A downhole tool for circulating fluid in a well bore. The tool includes an axial inlet and outlet with radial second outlets. A sleeve moves over the second outlets to control circulation of fluid. The sleeve can be selectively locked in an opened or closed configur... | 10/28/2008 |
| 7422063 | Hydrocarbon recovery from subterranean formations Recovery of viscous hydrocarbon by hot fluid injection into subterranean formations is assisted by using a specially designed and under-reamed vertical wellbore with multiple injection perforations separated from the production perforations by a moveable packer. In ... | 09/09/2008 |
| 7419001 | Universal tubing hanger suspension assembly and well completion system and method of using same A tubing hanger suspension assembly for an oil and gas well completion system and a method of installing same. The tubing hanger suspension assembly includes a tubing hanger housing which is positioned in the wellhead housing. The tubing hanger assembly includes a s... | 09/02/2008 |
| 7416029 | Downhole tool A downhole tool which can perform a task in a well bore, such as circulating fluid radially from the tool. The function is selectively performed by virtue of a sleeve moving within a central bore of the tool. Movement of the sleeve is effected by dropping a ball thr... | 08/26/2008 |
| 7413019 | Mounts for blowout preventer bonnets A bonnet locking apparatus is disclosed. The bonnet locking apparatus includes a segmented radial lock disposed around a bonnet and configured to engage a corresponding radial lock disposed in a body of a blowout preventer, at least one spring configured to bias at ... | 08/19/2008 |
| 7409987 | Disconnection device for a wireline A device for connection of a wireline (2) provided with a conductor (10), the wireline (2) being intended particularly for a wireline tool (4), wherein the wireline is provided with a wireline connector (6) in which each wireline s... | 08/12/2008 |
| 7398830 | Electric-hydraulic power unit The present invention is directed to an electric-hydraulic power unit. In one illustrative embodiment, the power unit comprises a body having a movable pressure barrier positioned therein, the movable pressure barrier defining first and second chambers therein, a co... | 07/15/2008 |
| 7395877 | Apparatus and method to reduce fluid pressure in a wellbore The present invention generally provides apparatus and methods for reducing the pressure of a circulating fluid in a wellbore. In one aspect of the invention an ECD (equivalent circulation density) reduction tool provides a means for drilling extended reach deep (ER... | 07/08/2008 |
| 7392860 | Stripper rubber on a steel core with an integral sealing gasket An elongated stripper rubber having a converging internal passage extending to a neck portion elastically expanded to snugly receive a drill string. The elongated stripper rubber is adhered to a steel core having a truncated conical load bearing surface containing a... | 07/01/2008 |
| 7392839 | Single line sliding sleeve downhole tool assembly A single fluid line sliding sleeve downhole tool assembly having a top sub engaging a top connector which connects to a body that engages a middle connector which is secured to a port housing, wherein the port housing engages a lower connector and the lower connecto... | 07/01/2008 |
| 7392863 | Rock drill bit The present invention relates to a rock drill bit for percussive drilling. The drill bit comprises a bit body; a head portion defining a longitudinal center axis. The head portion comprises a front face having an outer surface portion, and an inner surface portion d... | 07/01/2008 |
| 7387169 | Expandable tubulars The present invention provides apparatus and methods for completing a wellbore using expandable tubulars. Particularly, the invention relates to a system of completing a wellbore through the expansion of tubulars. More particularly, embodiments of the present invent... | 06/17/2008 |
| 7387160 | Use of sensors with well test equipment A method and system used for testing a subterranean well. A sensor (34), such as a distributed temperature sensor, comprising a sensing optical fiber (48) connected to an interrogation unit (50), is deployed together with a drill stem test strin... | 06/17/2008 |
| 7383898 | Inner and outer motor with eccentric stabilizer A downhole motor arrangement for a directional drilling comprises a first motor component (22), a second motor component (24) encircling at least part of the first motor component (22), and a third motor component (26) encircling at least... | 06/10/2008 |
| 7383899 | Spearhead assembly A spearhead assembly (10) comprises a base (12) provided with a slot (14) at one end (16) which opens onto an outer surface (13) of the base (12). The outer surface (13) is composed of three contiguous surface portion... | 06/10/2008 |
| 7380616 | Automatic downlink system A controller for a pump for pumping a drilling fluid from a storage unit to a downhole tool includes at least one actuation device coupled to a control console of the pump, and at least one connector coupled to the at least one actuation device and a pump control me... | 06/03/2008 |
| 7377318 | Interpretation and design of hydraulic fracturing treatments Solutions for the propagation of a hydraulic fracture in a permeable elastic rock and driven by injection of a Newtonian fluid. Through scaling, the dependence of the solution on the problem parameters is reduced to a small number of dimensionless parameters. ... | 05/27/2008 |
| 7377327 | Variable choke valve Embodiments of the present invention generally provide a more reliable variable choke flow control valve. In one embodiment, a variable choke valve for use in a wellbore is provided. The valve includes a tubular housing having an axial bore therethrough and a port t... | 05/27/2008 |
| 7373970 | Pin connector with seal assembly A pin connector with a seal assembly using a unique wet connect assembly. The pin connector is formed from a tubular having an upper tubular portion and a lower tubular portion. The lower tubular portion has an upper tubular body and a lower tubular body with a lowe... | 05/20/2008 |
| 7370711 | Rolling cone drill bit having non-circumferentially arranged cutter elements A rolling cone drill bit including multiple cones with regions of intermeshing and non-intermeshing cutter elements. In the non-intermeshed regions, an array of cutter elements is disposed about the cone surface in a non-circumferential arrangement with the cutter e... | 05/13/2008 |
| 7367413 | Cutting elements of gage row and first inner row of a drill bit A rolling cone drill bit is provided that has gage inserts on the first row from the bit axis to cut to full gage diameter that have a cutting portion enhanced with a layer of super abrasive material. The gage cutting surface has a center axis that is canted to be m... | 05/06/2008 |
| 7367403 | Top feed of control lines to table-elevated spider A method and apparatus are provided for installing control lines and pipe into a well. The pipe-holding spider that is normally mounted on the rig floor is supported by a table elevated above the rig floor. Supporting the spider on an elevated table provides personn... | 05/06/2008 |
| 7367411 | Drilling system and method A closed-loop circulating system for drilling wells has control of the flow rates in and out of the wellbore. Kicks and fluid losses are quickly controlled by adjusting the backpressure. Kick tolerance and tripping margins are eliminated by real-time determination o... | 05/06/2008 |
| 7363979 | Down hole oil and gas well heating system and method for down hole heating of oil and gas wells A down hole heating system for use with oil and gas wells which exhibit less than optimally achievable flow rates because of high oil viscosity and/or blockage by paraffin (or similar meltable petroleum byproducts). The heating unit the present invention includes sh... | 04/29/2008 |
| 7363975 | Push/pull belleville stack for use with zertech MTM seal A settable and unsettable seal arrangement includes a metal-to-metal seal element; a setting/releasing sleeve in operable communication with the seal element; a retraction ring fixedly attached to the setting/releasing sleeve; a load preservation and unsetting sleev... | 04/29/2008 |
| 7360612 | Roller cone drill bits with optimized bearing structures A roller cone drill bit may include optimally designed bearing structures and cutting structures. The roller cone drill bit may include three cone assemblies rotatably mounted on respective spindles via respective bearing structures. Each cone assembly may have a re... | 04/22/2008 |
| 7357200 | Earth auger An earth auger presents a shank having a spiral earth removing structure therearound. The structure first presents a series of spirally positioned housings with cutting teeth therein followed by a spiral cutting edge about the shank. The teeth are radially, vertical... | 04/15/2008 |
| 7357186 | Recirculation gas separator A submersible pumping system includes a pump, a motor that drives the pump and a separator assembly. The separator assembly is for separating gas from the fluid and includes an intake and a vent above the intake. Fluid enters the separator assembly at the intake and... | 04/15/2008 |
| 7357187 | BOP conversion apparatus A conversion apparatus comprising a first plate and a second plate. The first plate comprises at least one coupling mechanism, and the second plate comprises at least one coupling mechanism. The first plate is configured to couple with a blow-out preventer (BOP) bod... | 04/15/2008 |
| 7353887 | Control systems and methods for active controlled bottomhole pressure systems An active differential pressure device (APD device) in fluid communication with a returning fluid creates a differential pressure across the device, which controls pressure below the APD Device. In embodiments, a control unit controls the APD Device to provide a sel... | 04/08/2008 |
| 7353892 | Guide frame for an earth drilling apparatus A guide frame (1) for an earth drilling apparatus includes a support plate (6) for holding the drive unit (7) and a handle frame (2) having handle sections (17, 18) for holding and guiding the earth drilling apparatus. Operator-con... | 04/08/2008 |
| 7353880 | Method and apparatus for connecting tubulars using a top drive An apparatus for facilitating the connection of tubulars, said apparatus comprising a winch, at least one wire line, and a device for gripping the tubular, the arrangement being such that, in use, the winch can be used to winch said at least one wire and said device... | 04/08/2008 |
| 7350566 | Well completion with merged influx of well fluids The objective of the invention is to smoothly merge the influx flow streams with the wellbore flow stream so as to reduce the pressure drop along the perforated section of the wellbore liner. There is disclosed a completion liner for a well for the production of hyd... | 04/01/2008 |
| 7350597 | Drilling system and method A drilling system for drilling a bore hole into an earth formation, the bore hole having an inside wall. A drill string reaches into the bore hole from a surface, leaving a drilling fluid return passage between the drill string and the bore hole inside wall. A botto... | 04/01/2008 |
| 7347283 | Using a rotating inner member to drive a tool in a hollow outer member A rotating inner member is used to drive a downhole tool housed within the hollow outer member of a dual-member drill string. The downhole tool preferably will be adapted to receive rotational energy from the inner member. In a preferred embodiment, the downhole too... | 03/25/2008 |
| 7347274 | Annular barrier tool The present invention provides for an annular barrier tool to block or restrict the flow of well fluids in the annular region of a well. ... | 03/25/2008 |
| 7347268 | One trip flow tube exercising tool A flow tube exercising tool and method for use are described for actuating the flow tube of a downhole safety valve in order to remove build ups of scale and debris from the safety valve and ensure proper operation. The exercising tool provides an engagement portion... | 03/25/2008 |
| 7347269 | Flow tube exercising tool A flow tube exercising tool and method for use are described for actuating the flow tube of a downhole safety valve in order to remove build ups of scale and debris from the safety valve and ensure proper operation. The exercising tool provides a lower engagement po... | 03/25/2008 |
| 7343988 | Drilling apparatus A drilling apparatus for drilling a deviated bore comprising a tubular outer member having an offset and adapted for rotatably supporting a drill bit. The member has a gripping arrangement for selectively engaging the wall of a bore to restrain the member against ro... | 03/18/2008 |
