Did You Know...
...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7337854 | Gas-pressurized lubricator and method Embodiments of the present invention provide methods and apparatus for reducing kinetic energy of a plunger within a plunger lift system. In one aspect, a lubricator is provided at a surface of a wellbore, the lubricator having a sealed, pressurized chamber therein ... | 03/04/2008 |
| 7328749 | Method and apparatus for accumulating liquid and initiating upward movement when pumping a well with a sealed fluid displacement device Liquid is accumulated above fluid displacement device which is moveable and sealed within a production chamber defined by a production tubing, and upward movement of the fluid displacement device is initiated to pump liquid and gas from a well, by different magnitud... | 02/12/2008 |
| 7290602 | Internal shock absorber bypass plunger A bypass plunger having one or more internal shock absorbing elements and a variety of bypass orifice options is disclosed. ... | 11/06/2007 |
| 7275592 | Oil well pump apparatus An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime ... | 10/02/2007 |
| 7252178 | Acoustic fluid machine An acoustic fluid machine such as an air compressor comprises an acoustic resonator, a valve device and a piston. Air is sucked into the resonator through the valve device at one end of the resonator. The piston at the other end of the resonator is reciprocated by a... | 08/07/2007 |
| 7134503 | Wellbore pump The wellbore pump of the present invention comprises a plunger having passage means which may be open or closed by a valve operated by a piston which is biased in the open position by a spring of selected strength such that the wellbore pressure may overcome the spr... | 11/14/2006 |
| 7121347 | Liquid sampler A method and an apparatus raise samples of liquid such as water from a low level to a higher level, for example for obtaining a sample of groundwater from a borehole. The apparatus comprises a pair of tubes (14 and 16) extending alongside each other, w... | 10/17/2006 |
| 7021387 | Wellbore pump The wellbore pump of the present invention comprises a plunger having passage means which may be open or closed by a valve operated by a piston which is biased in the open position by a spring of selected strength such that the wellbore pressure may overcome the spr... | 04/04/2006 |
| 6851480 | Gas operated automatic, liquid pumping system for wells An improved, unattended, liquid pumping device for oil and gas wells featuring a bellows controlled flow valve that opens and closes at preset pressures. Additionally a well head receiver design that releases shut in production gas below the pumping device and provi... | 02/08/2005 |
| 6830108 | Plunger enhanced chamber lift for well installations Method for operating a well installation utilizing a chamber in operative association with plunger lift to carry out deliquidfication. Injection gas may be employed for plunger lift in a manner wherein the injection channel is isolated from the primary annulus of th... | 12/14/2004 |
| 6637510 | Wellbore mechanism for liquid and gas discharge A wellbore pump comprises a plunger having a passage which may be open or closed by a valve operated by a piston which is biased in the open position by a spring of selected strength such that the wellbore pressure may overcome the spring to close the val... | 10/28/2003 |
| 6206655 | Electrically-operated sealed compressor An electrically-operated sealed compressor includes a cylinder, a cylinder head mounted on the cylinder and having a suction chamber and first and second discharge chambers, a piston accommodated in the cylinder, and a valve mechanism. The valve mechanism... | 03/27/2001 |
| 5127803 | Pump tool An improved pump tool (10, 110, 200) is provided for lifting oil from within a casing 18 of a well. The gas in the well provides the lifting action. The pump tool includes a body (22) which is preferably formed of ABS plastic. The body defines an upper ch... | 07/07/1992 |
| 4986727 | Pressure-operated oil and gas well swabbing device An oil well swabbing device having a pressure activated valve for use in closing a fluid passage therein when the swabbing device is submerged under liquid in a well casing corresponding to a predetermined valve closing pressure; the pressure-activated va... | 01/22/1991 |
| 4898235 | Wellhead apparatus for use with a plunger produced gas well having a shut-in timer, and method of use thereof Wellhead apparatus as set forth for installation on a producing gas well which has a certain measure of condensate therein. The device includes an alignment tube which is precisely constructed for easy transition from the tubing string. That connects to a... | 02/06/1990 |
| 4410038 | Intermittent well controller An intermittent well controller is disclosed. In the preferred and illustrated embodiment, the controller, in conjunction with sensors indicative of well conditions, controls the delivery of lifting gas to the well. The controller is intended to be instal... | 10/18/1983 |
| 3941510 | Artificial lift for oil wells An apparatus for retrieving oil from a producing zone after the bottom hole pressure has decreased to such an extent that artificial lift is required for production. An accumulator is provided by casing sealed off with a packer, or an accumulation chamber... | 03/02/1976 |
| 3941511 | Artificial lift for oil wells An apparatus for retrieving oil from a producing zone after the bottom hole pressure has decreased to such an extent that artificial lift is required for production. An accumulator is positioned in the area of the casing where oil accumulates with the upp... | 03/02/1976 |
