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| Number | Title | Issue Date |
| 7891237 | Method for estimating pump efficiency The present invention provides highly accurate methods for directly calculating pump fillage which avoid the need and expense of a pump dynamometer card and subsequent calculations. ... | 02/22/2011 |
| 7500390 | Method for estimating pump efficiency The present invention provides highly accurate methods for directly calculating pump fillage which avoid the need and expense of a pump dynamometer card and subsequent calculations. ... | 03/10/2009 |
| 7359801 | Method and system for evaluating weight data from a service rig The present invention is directed to methods for an off-site supervisor or well owner to evaluate the rig load data provided by a well service rig at a well site by evaluating charts of sensor data obtained from sensors on or associated with the well service rig. A ... | 04/15/2008 |
| 7357628 | Clamping force sensor system A clamping force sensor system includes a clamping force sensor device, a signal-converting program carrier, and an output device. The clamping force sensor device includes a body mounted to a tie bar of a forming machine. The clamping force sensor device further in... | 04/15/2008 |
| 7034674 | Hour meter with incremental service indicator An hour meter having a display that provides a visual indication of a total time an engine has operated and a visual indication of engine operation time remaining in a predetermined service time interval. A plurality of segments on the display are selectively displa... | 04/25/2006 |
| 7032659 | Integrated control system for beam pump systems The present invention generally provides apparatus and methods of operating a pumping system. The pump control apparatus includes a first sensor for measuring strain on a structure of the well pumping system and a second sensor for measuring a position of the struct... | 04/25/2006 |
| 7021157 | System and method for testing a clamping force A system for testing a clamping force includes a lever, a base, and a sensor, The lever is coupled to a pivot and moves about the pivot. The lever includes a first end and a second end on opposites sides of the pivot. The base receives a first tip of a clamp and mai... | 04/04/2006 |
| 6941820 | Cuff type clamping force sensor A cuff type clamping force sensor is mounted around a surface of a load-bearing round column of a forming machine, so as to measure any stretch, tension, and surface stress of the load-bearing round column. The clamping force sensor mainly includes a cuff-type locat... | 09/13/2005 |
| 6940245 | Downhole compressor system with a feedback sensor A downhole compressor system is disclosed for assisting in extracting gas from the well. The system comprises a compressor 14, an electric motor 10 for driving the compressor 14 which motor has a stator winding and a rotor 12 and, in use,... | 09/06/2005 |
| 6857474 | Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons Apparatus, methods and products for monitoring/controlling a reciprocating well producing hydrocarbons from a wellbore, which determine the surface card from a well operating characteristics, determine the downhole card, and display both at the same scale for positi... | 02/22/2005 |
| 6532839 | Apparatus for the remote measurement of physical parameters Methods and apparatus for the remote measurement of physical parameters are described. The apparatus includes a sensor, sensor instrumentation, a carbon coated optical fiber cable for extending between the sensor and the sensor instrumentation, a conduit ... | 03/18/2003 |
| 5823262 | Coriolis pump-off controller The operation of an oil well pumping unit control system (20, 200) is governed by a computerized automated control unit (88) that receives flow rate measurements from a Coriolis flow meter (28). The control unit causes production from a beam pumping unit ... | 10/20/1998 |
| 5654504 | Downhole pump monitoring system The present invention relates to a downhole hydraulic pump monitoring system and more specifically relates to a system which detects and/or anticipates pump malfunctions by processing readings taken by a pressure transmitter on the operating pressure and ... | 08/05/1997 |
| 5309761 | Methods and apparatus for measuring the erodability of drilling fluid deposits Methods of measuring the erodability of drilling fluid deposits and the shear stress required to remove drilling fluid deposits formed on the walls of a well bore are provided. The methods basically include introducing a drilling fluid into a test apparat... | 05/10/1994 |
| 5184507 | Surface hydraulic pump/well performance analysis method Surface hydraulic fluid pressure and sucker rod displacement are measured and used to analyze the performance of a pumped oil well having a surface hydraulic actuator connected to a downhole pump by the sucker rod. The pressurized hydraulic fluid actuates... | 02/09/1993 |
| 5167490 | Method of calibrating a well pumpoff controller A method of calibrating a well pumpoff controller by calibrating the controller for determining the average load during a pumping stroke, measuring the actual load and averaging the measured maximum and minimum load during each operational stroke, compari... | 12/01/1992 |
| 5159832 | Indicating device An indicating device for repeatedly indicating variation in the load on a part such as a polish rod of a pump is disclosed. The indicating device includes an indicator for providing an indication when current flows through the indicator, a switch for movi... | 11/03/1992 |
| 4947936 | Well unit dynamometer installation means and method A well unit dynamometer installation means and method. A reciprocal well unit is operated with a spacer mounted on the polish rod above the carrier bar. To install a dynamometer the unit is stopped, the loading removed from the carrier bar, the spacer rem... | 08/14/1990 |
| 4932253 | Rod mounted load cell A load cell is mounted on a polished rod between a rod clamp and a hanger bar. The polished rod is connected to a string of sucker rods that drive a reciprocating pump for lifting fluid from a borehole. The load cell includes a tubular body which is fitte... | 06/12/1990 |
| 4873635 | Pump-off control A pump-off controll device for controlling a pumpjack unit. The device measures the length of time required for the pump to downstroke successive numbers of times, and when the time differential reaches a predetermined value, the well is shut-in for a tim... | 10/10/1989 |
| 4854164 | Rod pump optimization system An apparatus for measuring the quantity and flow rate of liquids in a flowing fluid stream containing liquids and gases such as found in oil well production, with an optional controller for oil well pumps to control the pumping period or speed based on pu... | 08/08/1989 |
| 4747451 | Level sensor A system for controlling production in an oil well comprises a first level sensor mounted upon the outer surface of the tubing near the lower end of the tubing and a second level sensor mounted upon the outer surface of the tubing above the first level se... | 05/31/1988 |
| 4741208 | Pump differential pressure monitor system A pump differential pressure monitor system enables both discharge and intake pressure to be monitored at the surface of a centrifugal well pump. This system includes a tubular sub mounted between the pump and the tubing. A receptacle is located inside th... | 05/03/1988 |
| 4672845 | Polish rod temperature sensing system and rod stroking control A well polish rod temperature sensing system, for use at a well head, comprising (a) first sensor located in proximity to the polish rod to sense its temperatures T1, (b) second sensor for sensing temperature T2 of the environment near ... | 06/16/1987 |
| 4661751 | Well pump control system A well pump control system is disclosed for utilization with a conventional well pump having a stationary member and a reciprocating member. The reciprocating member operates a down-hole pump and is attached to a rocking beam through a load cell. The rock... | 04/28/1987 |
| 4644785 | Hinged strain cell mounting apparatus Apparatus for removably connecting a strain cell to a polished rod of a well pumping unit and for preventing the development of strain cell output signals due to bending of the polished rod. The strain cell is connected to a frame member which can be clam... | 02/24/1987 |
| 4631954 | Apparatus for controlling a pumpjack prime mover An improved pump control having a device for measuring relative movement between structural components of a pumpjack unit, and converting the movement into a signal which varies according to the magnitude of the movement. The signal is divided into an ups... | 12/30/1986 |
| 4620189 | Parameter telemetering from the bottom of a deep borehole An apparatus for measuring one or more parameters of the subsurface environment, and telemetering one or more parameters of the subsurface environment to the surface. Apparatus at the surface includes a source of intermediate frequency and voltage, electr... | 10/28/1986 |
| 4583915 | Pump-off controller The pump-off controller checks for pump-off by calculating the area inside of a figure whose boundaries are the minimum load, two position lines defined by the user and the load at the time the calculation is being made. This area is compared to a user de... | 04/22/1986 |
| 4576041 | Dynamic balancing means for an oil well pumping unit A tension indicator is applied to the belt of a belt driven oil well pumping unit. The pumping unit is driven by an internal combustion engine, and the tension indicator is read for at least one complete cycle of the pumping unit so that the up and down s... | 03/18/1986 |
| 4561299 | Apparatus for detecting changes in inclination or acceleration Apparatus for detecting changes in inclination or acceleration is disclosed. In its preferred environment the apparatus is used to determine the position of the sucker-rod of a sucker-rod pump. The preferred embodiment of the apparatus includes a magnetic... | 12/31/1985 |
| 4541274 | Apparatus and method for monitoring and controlling a pump system for a well Pulses produced by a pulse generator coupled to the output shaft of an electric motor that reciprocates a polish rod of a well pumping system are counted by a computer to locate the polish rod at a series of positions during each reciprocation of the poli... | 09/17/1985 |
| 4509365 | Method and apparatus for weighing a sucker-rod pumped well Method and apparatus for checking a sucker-rod pumped well for defects by weighing the well. A load cell connected between the sucker-rod and a power unit develops a signal representative of the load on the sucker-rod. The sucker-rod load is checked with ... | 04/09/1985 |
| 4507055 | System for automatically controlling intermittent pumping of a well A system for automatically controlling the intermittent pumping of a well minimizes fluid pound occurrence without reducing well production. The pump is operated in a learn mode until pump-off of the well when the pump is deactivated for a preset period. ... | 03/26/1985 |
| 4492115 | Method and apparatus for measuring defects in ferromagnetic tubing A method and apparatus for determining the extent of defects in ferromagnetic tubular elements comprising a continuous string for use in an oil or gas well is disclosed. The tubing trip tool measures tubing average wall thickness, local defects, such as c... | 01/08/1985 |
| 4487061 | Method and apparatus for detecting well pump-off Methods and apparatus for detecting fluid pound in a sucker-rod oil well, using maximum and minimum values of sucker-rod position and of sucker-rod load to calculate a reference position and a selected load value. The apparatus automatically calculates th... | 12/11/1984 |
| 4430892 | Pressure loss identifying apparatus and method for a drilling mud system Methods and means are disclosed for the monitoring of conditions in a mud circulation system as used in the drilling of oil and gas wells, and to quickly detect and indicate pressure failures that may occur in that system to thereby allow for the maximum ... | 02/14/1984 |
| 4389164 | Automatic liquid level controller A source of acoustic pressure pulses is coupled to the surface casing of a well so that they are transmitted down the well and reflected by the gas-liquid interface. A transducer is also coupled to the well to produce an electrical signal in response to d... | 06/21/1983 |
| 4365506 | Remotely operated downhole test disconnect switching apparatus A remotely controlled switching apparatus for selectively controlling the connection of a downhole device to a power cable which carries power to a downhole motor includes a thermostatic switch connected between the device and the cable, and a heater for ... | 12/28/1982 |
| 4311047 | Fluid presence detector The present invention detects the presence of liquid and it is used to control pumping of a well when the quantity of liquid being discharged by the pump per stroke is much less than the volumetric displacement of the pump. A fluid detector (96) includes ... | 01/19/1982 |
