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| Number | Title | Issue Date |
| 6951262 | Method and apparatus for suppressing waves in a borehole Methods and apparatus for suppression of wave energy within a fluid-filled borehole using a low pressure acoustic barrier. In one embodiment, a flexible diaphragm type device is configured as an open bottomed tubular structure for disposition in a borehole to be fil... | 10/04/2005 |
| 6920936 | Constant force actuator A substantially constant force actuator that is applicable to centralizers, anchors and tractors for use in wells and is applicable to lifting devices such as jacks and load supporting devices. One or more sets of linkage arms are angularly movable by the force of o... | 07/26/2005 |
| 6904797 | Production profile determination and modification system A system and method for profiling and modifying fluid flow through a wellbore. The system comprises a logging system, a downhole unit, and a deployment system. The logging system comprises a logging tool. The downhole unit is operable to house the logging tool. In a... | 06/14/2005 |
| 5509478 | Method of determining the quality of steam for stimulating hydrocarbon production A method has been discovered for determining the quality of steam reading a subterranean formation through a well bore. The steam is passed through a choke which imparts critical flow characteristics. A turbine meter is calibrated at the surface at known ... | 04/23/1996 |
| 5094103 | Steam quality and flow rate measurement A method and apparatus for measuring both the quality and flow rate of steam injected into a hydrocarbon formation in a thermal recovery process. The method measures both the quantity of water and the flow rate of the steam. Both measurements can be made ... | 03/10/1992 |
| 4928758 | Downhole wellbore flowmeter tool A downhole flowmeter tool adapted to be lowered into a wellbore and expanded to provide a restricted flow annulus around the tool. One or more flow-sensing means are positioned within the annulus to measure flow therethrough.... | 05/29/1990 |
| 4267726 | Well pressure testing method A method for testing producing oil and gas wells is disclosed for determining a representation of pressure at different selected levels of an interval having one or more production zones by combining pressure and pressure gradient measurements. Another as... | 05/19/1981 |
| 4033187 | Well flow measuring apparatus In the representative embodiment of the apparatus of the present invention disclosed herein, a plurality of outwardly-biased bow springs are disposed around the lower end of the body of a spinner-type flowmeter and cooperatively arranged for centering at ... | 07/05/1977 |
| 3954006 | Methods for determining velocities and flow rates of fluids flowing in well bore In the several representative embodiments of the new and improved methods disclosed herein, a cable-suspended spinner-type flowmeter is successively lowered and raised at selected speeds in a well bore containing one or more flowing fluids whose velocity ... | 05/04/1976 |
| 3934467 | Spinner flowmeter with isolated bearings In the representative embodiment of the present invention disclosed herein, a well bore flowmeter is provided with a fluid-driven spinner which is uniquely mounted on the closed end of a hollow shaft that is coaxially disposed over a spindle and rotatably... | 01/27/1976 |
