公开(公告)号：US06199628B1

公开(公告)日：2001-03-13

申请号：US09063233

申请日：1998-04-20

申请人： Harold Kent Beck ,  Alan Tancel Jackson ,  Clark Edward Robison ,  John Joseph Goiffon

发明人： Harold Kent Beck ,  Alan Tancel Jackson ,  Clark Edward Robison ,  John Joseph Goiffon

IPC分类号： E21B2300

CPC分类号： E21B41/00 ,  E21B23/06 ,  E21B44/005 ,  E21B47/124

摘要： 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.

摘要翻译： 井下力发生器包括适于移动到井中的纵向力产生和传递组件（包括例如电动机和通过电动机的操作而延伸和缩回的螺纹轴）。 控制器还适于移动到井中并且连接到纵向力产生和传递组件。 控制器包括存储器，该存储器包含用于控制纵向力产生和传递组件以在井中获得至少一个期望操作条件的程序。 传感器可以连接到控制器。 还可以使用适于移入井中的独立电源。 在油井或气井中提供无级可变线性力的方法是这种井下力发生器的特殊应用。 该特定方法包括在井中感测在井中选择的操作条件中的变化的连续性响应的参数。 该方法还包括致动微控制器以运行存储在微控制器中的预定程序。 运行程序以获得在感测参数的连续体内表示的所选择的操作条件的特定状态。