| Patent Number |
Title Of Patent |
Date Issued |
| 6062307 |
Screen assemblies and methods of securing screens |
May 16, 2000 |
| A screen or filter assembly is described as well as improved methods of affixing such assemblies to a portion of an oil or gas production assembly. A nonrigid attachment for reversibly securing a tubular screen to a portion of a production string is disclosed which significantly redu |
| 5535767 |
Remotely actuated adjustable choke valve and method for using same |
July 16, 1996 |
| A remotely-adjustable valve employable in an enhanced-lift recovery system and a method of adjusting the same. The valve comprises: (1) an elongated valve body having a process fluid inlet and a process fluid outlet, (2) an elongated valve stem disposed within the valve body for axial di |
| 5188182 |
System containing expendible isolation valve with frangible sealing member, seat arrangement and |
February 23, 1993 |
| An isolation valve for a downhole well completion system having a one piece frangible, ceramic sealing element and an extrusion resistant resiliently faced valve seat and a method for the use thereof is presented. Said sealing element is biased to the closed position and rotatable within |
| 5163515 |
Pumpdown toolstring operations in horizontal or high-deviation oil or gas wells |
November 17, 1992 |
| Pumpdown toolstring for performing operations requiring application of power downhole in horizontal or high-deviation oil or gas wells, comprising an elongate toolstring element (30), locomotive devices (31, 32A) on said toolstring element, with at least one locomotive device (32) pr |
| 4730677 |
Method and system for maintenance and servicing of subsea wells |
March 15, 1988 |
| A system and method for servicing subsea wells with a flexible riser. The flexible riser can be modified for use either with wireline or through the flow line tools. The flexible riser eliminates the requirement for motion or heave compensating equipment associated with rigid marine rise |
| 4574883 |
Well tool stopping devices, systems and methods |
March 11, 1986 |
| A tool stopping device for use in well flow conductors for stopping well tools moving therethrough, these devices being located at desired checkpoints, their arrival thereat indicating the progress of the tools in the flow conductor, each device having lugs movable between an inner, tool |
| 4465132 |
Releasable well tool stopping devices and systems |
August 14, 1984 |
| A tool stopping device for use in a well flow conductor having a preferably full open bore and an abrupt stop shoulder surrounding the bore and engageable by corresponding stop shoulders of spring biased keys carried on a well tool for stopping the well tool as it moves through the flow |
| 4273186 |
Well safety valve system |
June 16, 1981 |
| A well safety system comprising a tubing retrievable safety valve adaptable for being connected in a well tubing string with means therein, responsive to pressure, for opening and closing the valve. The tubing retrievable safety valve is to be connected, in the tubing string, below a lan |
| 4258794 |
Underwater completion habitat |
March 31, 1981 |
| A submergible, underwater well completion habitat and a method of employing the same in the completion of wells at extended depths. The well completion habitat may be attached to an underwater well platform and maintained at a pressure of sufficient value to expel water from the work |
| 4227573 |
Reinforced seal unit for pumpdown pistons or well swabs |
October 14, 1980 |
| A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip ha |
| 4035011 |
Soft set running tool |
July 12, 1977 |
| A well running tool used for lowering and setting well bomb hangers and various tool string hangers in a well and then disengagement for removal from the well, leaving the hanger set in place in the well. It is a soft set running tool designed to disengage from a bomb hanger, or other we |
