F - Mech Eng,Light,Heat,Weapons – 03 – B
Patent
F - Mech Eng,Light,Heat,Weapons
03
B
F03B 15/12 (2006.01) E21B 4/00 (2006.01) E21B 4/02 (2006.01) E21B 23/08 (2006.01) E21B 34/10 (2006.01) E21B 37/04 (2006.01) E21B 44/00 (2006.01) F03B 13/02 (2006.01) F04B 47/08 (2006.01) F04B 49/035 (2006.01)
Patent
CA 2492354
A flow control valve is disclosed for controlling the rotation of a hydraulic motor, such as a turbine, a mud motor, for example, having an element that rotates in response to power fluid. The valve disclosed may include a valve housing and a valve piston, each having a port, moveable relative to one another. When the ports at least partially align, bypass flow is generated which acts to decrease the speed of rotation of the element, such as a turbine shaft. An energizer, such as a pump assembly, is further described which is adapted to move the valve housing or the valve piston in response to the speed of rotation, such that bypass flow is a function of the motor speed (i.e. speed of rotation of the element). A bottom hole assembly including a flow control valve and a method of controlling the rotation of a downhole tool are also described.
Brunskill Doug
Pike Don
Ravensbergen John E.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Bj Services Company
Bj Services Company Canada
LandOfFree
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