초록 ▼

A downhole force generator includes a longitudinal force generating and transmitting assembly (including, for example, a motor and a threaded shaft that is extended and retracted by operation of the motor) adapted to be moved into a well. A controller is also adapted to be moved into the well and is

A downhole force generator includes a longitudinal force generating and transmitting assembly (including, for example, a motor and a threaded shaft that is extended and retracted by operation of the motor) adapted to be moved into a well. A controller is also adapted to be moved into the well and is connected to the longitudinal force generating and transmitting assembly. The controller includes a memory containing a program to control the longitudinal force generating and transmitting assembly to obtain at least one desired operating condition in the well. A sensor can be connected to the controller. A self-contained power source adapted to be moved into the well can also be used. A method of providing an infinitely variable linear force in an oil or gas well is a particular application for such a downhole force generator. This particular method comprises sensing in the well a parameter responsive over a continuum to changes in a selected operating condition in the well. This method further comprises actuating a microcontroller to run a predetermined program stored in the microcontroller. The program is run to obtain a specific state of the selected operating condition represented within the continuum of the sensed parameter.

대표청구항 ▼

[What is claimed is:] [1.]a longitudinal force generating and transmitting assembly adapted to be moved into a well, the assembly including a mechanism to facilitate coupling to a conveying member selected from the group consisting of a slickline, a wireline, and a coiled tubing; anda controller ada

[What is claimed is:] [1.]a longitudinal force generating and transmitting assembly adapted to be moved into a well, the assembly including a mechanism to facilitate coupling to a conveying member selected from the group consisting of a slickline, a wireline, and a coiled tubing; anda controller adapted to be moved into the well and connected to the longitudinal force generating and transmitting assembly, the controller including a memory containing a program having data to control the longitudinal force generating and transmitting assembly across a continuum to obtain any desired operating condition in the well, wherein the data defines any of three or more states of the desired operating condition or any of three or more values of the desired operating condition.