| Patent Number |
Title Of Patent |
Date Issued |
| 6394181 |
Self-regulating lift fluid injection tool and method for use of same |
May 28, 2002 |
| A self-regulating lift fluid injection tool (100) adapted for placement within production tubing (30). The tool (100) has a control valve (126) that controls the rate of injection of a lift fluid (102) into the formation fluids (104) being produced through the production tubing (30). |
| 6343649 |
Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
February 5, 2002 |
| A system of downhole communication and control is provided in methods and associated apparatus for data retrieval, monitoring and tool actuation. In a described embodiment, an item of equipment installed in a tubular string has a first communication device associated therewith. A tool co |
| 6298919 |
Downhole hydraulic path selection |
October 9, 2001 |
| A method of servicing a well and an associated well system provide convenient downhole hydraulic path selection. In a described embodiment, a hydraulic path selector is preconfigured for selection of a desired hydraulic path set, and then the selector is conveyed into a tubular strin |
| 6286596 |
Self-regulating lift fluid injection tool and method for use of same |
September 11, 2001 |
| A self-regulating lift fluid injection tool (100) adapted for placement within production tubing (30). The tool (100) has a control valve (126) that controls the rate of injection of a lift fluid (102) into the formation fluids (104) being produced through the production tubing (30). |
| 6150601 |
Method and apparatus for generating electric power downhole |
November 21, 2000 |
| Electric power is generated downhole in a well using a thermoelectric device. A temperature gradient or differential .DELTA.T present in the well is applied to the thermoelectric device to produce a voltage potential across the output terminals of the device. The thermoelectric devic |
| 5479991 |
Reeled tubing deployed packer with control line bypass |
January 2, 1996 |
| A packer for a subterranean oil and/or gas well. The packer has a control signal bypass passage incorporated in the packer body. The control signal bypass passage may be opened and closed via reeled tubing to selectively allow and disallow passage of a control signal through the packer. |
| 5390742 |
Internally sealable perforable nipple for downhole well applications |
February 21, 1995 |
| A longitudinally spaced series of tubular nipple structures are installed in a well flow conductor operatively extended through a subterranean well bore. Each nipple structure has a thinned-wall, increased interior diameter longitudinal section through which a plurality of fluid flow |
| 5211241 |
Variable flow sliding sleeve valve and positioning shifting tool therefor |
May 18, 1993 |
| A sliding sleeve valve useful in a flow conduit to control and vary area of openings open for flow through the valve. The valve has a sleeve having a through flow passage and the sleeve is moveable between open, intermediate and closed positions. When the sleeve is in open position, the |
