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| Number | Title | Issue Date |
| 7185536 | Pressure monitoring technique for downhole tools The outlet pressure of a pump that fluctuates rapidly, as is typical of high pressure multiplex pumps, is sensed in a pressure line leading from the main flow line to a damping mechanism. The damping mechanism comprises a pair of small spaced openings, which are pre... | 03/06/2007 |
| 6931916 | Viscometer sag test shoe Methods and apparatus for measuring sag properties of a drilling fluid using a rotary viscometer. An insert, or shoe, is placed at the bottom of the heat cup containing the fluid to be tested. A rotating cylinder is disposed within the fluid and solid particles are ... | 08/23/2005 |
| 6640896 | Mechanical oil recovery method and system with a sucker rod pump This invention relates to a mechanical oil recovery method and system with a sucker-rod pump. The method calculates the lowest power loss or the lowest cost. The method comprises sequentially arranging internal diameter, steel grade of rod, pump diameter,... | 11/04/2003 |
| 6330826 | Dynamic sag monitor for drilling fluids An apparatus and a method are described for measuring the sag properties of a drilling fluid by using a conically or frustro-conically shaped inner body and an outer body having an opening with contours closely matching those of inner body such that in co... | 12/18/2001 |
| 6234250 | Real time wellbore pit volume monitoring system and method A system is provided for monitoring in the real time the wellbore pit volume to promptly determine the occurrence of a wellbore kick and take corrective action to minimize fluid influx volume and/or drilling fluid losses. A system includes one or more lev... | 05/22/2001 |
| 5291777 | System for monitoring oil well performance A system for monitoring performance of a pumping unit of an oil well includes a first sensor for measuring the inclination angle of a beam forming part of the pumping unit, a second sensor for measuring the load on the beam, and a third sensor for measuri... | 03/08/1994 |
| 5230244 | Formation flush pump system for use in a wireline formation test tool The present disclosure is directed to a formation test tool having similar, even identical, fist and second test probes which have supported snorkels thereon. They extend from the tool into a particular formation. One serves as an inlet and the other serv... | 07/27/1993 |
| 5182946 | Portable well analyzer A device for use on a well pumping unit. The device provides for real time measurement and recording of acceleration of a polished rod resulting from the oscillating linear motion induced by the rotating motion of the pumping unit crank. The device includ... | 02/02/1993 |
| 4599046 | Control improvements in deep well pumps A counterbalanced, long stroke pumping system provided with a composite material lifting string is conformed for optimum separation between the frequency spectra entailed in the pump drive and the fundamental resonances of the string. This separation allo... | 07/08/1986 |
| 4551730 | Method and apparatus for entering control points relative to a dynagraph of a well pumping unit Method and apparatus for entering control points relative to a dynagraph of a well pumping unit using the position of a beam and a pen holder of an XY plotter. The beam and/or the pen holder is physically moved to a desired location and an "enter" button ... | 11/05/1985 |
| 4509901 | Method and apparatus for detecting problems in sucker-rod well pumps Method and apparatus for detecting problems in sucker-rod well pumps and for determining which type of problem occurs. A first transducer provides a signal representative of the load on a sucker-rod string and a second transducer provides a signal represe... | 04/09/1985 |
| 4483188 | Method and apparatus for recording and playback of dynagraphs for sucker-rod wells Method and apparatus for recording and subsequent playback of selected dynagraphs for wells employing sucker-rod pumping units to determine well faults which cause well shutdown. Calibration data from well monitoring equipment is stored in a first "endles... | 11/20/1984 |
| 4363605 | Apparatus for generating an electrical signal which is proportional to the tension in a bridle Apparatus for generating an electrical signal which is proportional to the tension in a bridle which supports a string of sucker rod associated with a pumpjack unit. The apparatus includes a main frame having a load cell mounted thereto, and opposed cable... | 12/14/1982 |
| 4208665 | Dynamometer for monitoring sucker rod strings A dynamometer for monitoring the tension in a pair of spaced, elongated members. A pen, actuated by a sensor means, measures the tension in the pair of spaced, elongated members, and places indicia upon a continuously moving chart. The indicia is related ... | 06/17/1980 |
| 4194393 | Well driving and monitoring system A well driving and monitoring system for a well of the reciprocating rod type utilizes a right angle drive transmission with a load cell therein arranged to monitor torque loads and thus continuously monitor the loads on the reciprocating rod of the pumpi... | 03/25/1980 |
| 4043191 | Dynanometer for a pump-off control A dynamometer for measuring the tension in a pair of spaced, elongated members. The dynamometer includes a spring member having distal ends spaced from a medial portion, and a clamp means by which the distal ends are attachable to the elongated members to... | 08/23/1977 |
