| Patent Number |
Title Of Patent |
Date Issued |
| 7353887 |
Control systems and methods for active controlled bottomhole pressure systems |
April 8, 2008 |
| 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 selected pressure differe |
| 7270185 |
Drilling system and method for controlling equivalent circulating density during drilling of wel |
September 18, 2007 |
| A drilling system for drilling subsea wellbores includes a tubing-conveyed drill bit that passes through a subsea wellhead. Surface supplied drilling fluid flows through the tubing, discharges at the drill bit, returns to the wellhead through a wellbore annulus, and flows to the surf |
| 7185705 |
System and method for recovering return fluid from subsea wellbores |
March 6, 2007 |
| A subsea return fluid recovery system for recovering drilling fluid and cuttings ("return fluid") from a subsea wellbore in one embodiment includes a hub at the opening of the subsea wellbore that directs fluid into a transport device. In one embodiment, the hub includes a stand pipe |
| 7174975 |
Control systems and methods for active controlled bottomhole pressure systems |
February 13, 2007 |
| Methods and control systems are provided for a wellbore drilling system having an active differential pressure device (APD device) in fluid communication with a returning fluid. The APD Device creates a differential pressure across the device, which reduces the pressure below or down |
| 7114581 |
Active controlled bottomhole pressure system & method |
October 3, 2006 |
| A wellbore drilling system has an umbilical that carries a drill bit in a wellbore. Drilling fluid pumped into the umbilical discharges at the drill bit bottom and returns through an annulus between the umbilical and the wellbore carrying entrained drill cuttings. An active differential |
| 7096975 |
Modular design for downhole ECD-management devices and related methods |
August 29, 2006 |
| One or more components of a wellbore drilling assembly utilize a modular construction to facilitate assembly, disassembly, repair and/or maintenance of a wellbore drilling assembly and/or to extend the overall operating capabilities of the drilling assembly. In one embodiment, a modu |
| 7055627 |
Wellbore fluid circulation system and method |
June 6, 2006 |
| The present invention provides drilling systems for drilling wellbores. The drilling system includes an umbilical that passes through a wellhead and carries a drill bit. A drilling fluid system supplies drilling fluid into an annulus (supply line) between the umbilical and the wellbore, |
| 6854532 |
Subsea wellbore drilling system for reducing bottom hole pressure |
February 15, 2005 |
| The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at th |
| 6648081 |
Subsea wellbore drilling system for reducing bottom hole pressure |
November 18, 2003 |
| The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at th |
| 6527054 |
Apparatus and method for the disposition of drilling solids during drilling of subsea oilfield w |
March 4, 2003 |
| This invention provides apparatus and methods for controlling the particle size of the solid mass present in the circulating drilling fluid returning from an underwater wellhead during the drilling of a subsea wellbore. The system may include a separator at the sea floor adjacent the wel |
| 6446737 |
Apparatus and method for rotating a portion of a drill string |
September 10, 2002 |
| The present invention provides an apparatus and method for partially rotating a drill string. The drill string of the present invention comprises upper and lower sections wherein the lower section rotates relative to the upper section of the drill string from the surface at the injec |
| 6415877 |
Subsea wellbore drilling system for reducing bottom hole pressure |
July 9, 2002 |
| The present invention provides drilling systems for drilling subsea wellbores. The drilling system includes a tubing that passes through a sea bottom wellhead and carries a drill bit. A drilling fluid system continuously supplies drilling fluid into the tubing, which discharges at th |
| 6408948 |
Tubing handling for subsea oilfield tubing operations |
June 25, 2002 |
| A tubing handling for subsea oilfield tubing operations, includes an isolation tube to mechanically and/or chemically protect the drill string and improved passage of the drill string and fluid return line to the drilling vessel that further protects them during drilling use. In addi |
| 6276454 |
Tubing injection systems for oilfield operations |
August 21, 2001 |
| This invention provides a tubing injection system that contains one injector for moving a tubing from a source thereof to a second injector. The second injector moves the tubing into the wellbore. In an alternative embodiment for subsea operations, the system may contain a first injector |
| 6179057 |
Apparatus and method for killing or suppressing a subsea well |
January 30, 2001 |
| The present invention provides apparatus and method for killing or suppressing a subsea wellbore. The system includes a pressure intensifier adjacent the wellhead. The output of the pressure intensifier is coupled to a "kill" inlet at the wellhead equipment. Power is supplied from the |
| 6116345 |
Tubing injection systems for oilfield operations |
September 12, 2000 |
| This invention provides a tubing injection system that contains one injector for moving a tubing from a source thereof to a second injector. The second injector moves the tubing into the wellbore. In an alternative embodiment for subsea operations, the system may contain a first injector |
| 6032744 |
Universal pipe and tubing injection apparatus and method |
March 7, 2000 |
| An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow p |
| 5954137 |
Apparatus and method for avoiding formation impairment during completion of wellbores |
September 21, 1999 |
| Completion method for avoiding formation impairment in the completion of a wellbore by anchoring and activating a plug at a selected position in the wellbore to seal off a selected portion of the wellbore from other portions of the wellbore. The plug is positioned at the selected positio |
| 5890534 |
Variable injector |
April 6, 1999 |
| Apparatus for handling pipe, coiled tubing, casing, and conventional tubing in well drilling and servicing operations. |
| 5875850 |
Universal pipe and tubing injection apparatus and method |
March 2, 1999 |
| An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow p |
| 5850874 |
Drilling system with electrically controlled tubing injection system |
December 22, 1998 |
| The present invention provides a drilling rig which includes an electrically-controllable tubing injection system. The injection system contains a fixed injector head with two movable injection blocks which are remotely operable to provide a desired opening therebetween. Each injecti |
| 5845708 |
Coiled tubing apparatus |
December 8, 1998 |
| Apparatus for handling pipe, coiled tubing, casing and conventional tubing in well drilling and servicing operations. |
| 5823267 |
Universal pipe and tubing injection apparatus and method |
October 20, 1998 |
| An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow p |
| 5738173 |
Universal pipe and tubing injection apparatus and method |
April 14, 1998 |
| An apparatus for injection of coiled tubing or jointed tubulars into a well bore, using an injector head capable of handling either type of tubular. The injector head and a working platform are mounted on a structure over the well head, with the injector being positioned so as to allow p |
| 4466067 |
Multi-detector intensity interferometer and method for processing incoherent radiation signals |
August 14, 1984 |
| A multi-detector intensity interferometer includes plural radiation detectors positioned in a predetermined geometric array. Incoherent radiation signals from a body are received by the respective detectors, time-delayed relative to one another, and the time-delayed signals are fed t |
