Progressing cavity motor governing system

Details Progressing cavity motor governing system Progressing cavity motor governing system

E - Fixed Constructions

21

B

255/12

E21B 4/00 (2006.01) E21B 4/02 (2006.01) E21B 21/10 (2006.01)

Patent

CA 1161426

ABSTRACT OF THE INVENTION PROGRESSING CAVITY MOTOR CONTROL SYSTEM There is disclosed a control system for a hydraulic down-hole earth drilling motor of the helical gear pair type to control the pressure drop of the fluid through the motor so that it does not become excessive. A housing is provided defining a chamber, one end of the housing being secured to the outer member housing of the motor. Valve means and pressure controlling means are positioned in the chamber. Linkage means positioned within the chamber joins the valve means pressure controlling means and the upper end of the inner member of the motor. In operation the inner member of the motor may be caused to operate the valve means to control the fluid flow and therefore the pressure drop through the motor in order to protect the motor from overload. A further embodiment of the invention corrects an additional problem in down-hole motors resulting from the back flow when the drilling is stopped for any reason.

379962

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