| Patent Number |
Title Of Patent |
Date Issued |
| D603562 |
Hair care caddy |
November 3, 2009 |
|
| 7316542 |
Fluid level control system |
January 8, 2008 |
| A control system governs fluid level in a well system including a pump positioned downhole for pumping fluid upward through a tubular, a rod positioned within the tubular for driving the pump, a prime mover, and a pumpjack to transmit power from the prime mover to the rod to reciprocate |
| 7314349 |
Fluid level control system for progressive cavity pump |
January 1, 2008 |
| A control system controls a progressive cavity pump driven by a rod. The rod is powered by a prime mover, such as a variable speed drive. A proximity sensor outputs signals responsive to rotational positioning of the rod. A controller receives the signals and computes a time interval |
| 6409476 |
Pumpjack dynamometer and method |
June 25, 2002 |
| A dynamometer readout (42, 46) and method is disclosed for obtaining dynamometer information (110) related to pumpjacks (10). For this purpose, a change of pivotal direction of the walking beam (18) may be detected by processor (82) utilizing an encoder component (60) with spaced slots ( |
| 6315523 |
Electrically isolated pump-off controller |
November 13, 2001 |
| Electrical isolation method and assembly that protects a pump-off controller 31 as used for controlling the pumping of a subterranean well, from lightning and transient electrical power surges by electrically isolating the pump-off controller 31, the isolation assembly including fibe |
| 6176682 |
Pumpjack dynamometer and method |
January 23, 2001 |
| A dynamometer readout (42, 46) and method is disclosed for obtaining dynamometer information (110) related to pumpjacks (10). For this purpose, a change of pivotal direction of the walking beam (18) may be detected by processor (82) utilizing an encoder component (60) with spaced slots ( |
| 5458466 |
Monitoring pump stroke for minimizing pump-off state |
October 17, 1995 |
| Fluid pounding in a pumpjack is minimized by dictating the length of the run cycles of the pumpjack. The pumpjack is first allowed to pump down until a fluid pounding state is reached, at which time it is shut down. The time it takes to reach this state is monitored. Using the length of |
| 4631954 |
Apparatus for controlling a pumpjack prime mover |
December 30, 1986 |
| 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 upstroke and downstroke component |
| 4363605 |
Apparatus for generating an electrical signal which is proportional to the tension in a bridle |
December 14, 1982 |
| 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 engaging arms, one of which exte |
| 4208665 |
Dynamometer for monitoring sucker rod strings |
June 17, 1980 |
| 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 to the magnitude of the measured |
