E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/12 (2006.01) E21B 4/04 (2006.01) E21B 7/00 (2006.01) E21B 41/00 (2006.01) E21B 47/18 (2006.01)
Patent
CA 2499381
An apparatus and related method are useful for compensating the pressure of drilling fluid in a telemetry and power generating assembly within a drill collar disposed in a borehole. The apparatus includes a stator adapted for being secured within the drill collar against rotation relative to the drill collar, and a shaft rotatably carried within the stator so as to define a fluid-conducting annular gap between the shaft and the stator. The shaft has a fluid-conducting channel extending axially therethrough. A rotor is secured about the shaft for rotation therewith. A portion of the rotor is disposed adjacent a portion of the stator so as to define an inlet between the rotor and stator portions through which drilling fluid in the drill collar will be conducted. The rotor portion further cooperates with the stator and the shaft to define a first annular cavity that fluidly communicates with the gap and the inlet. A rotary seal is disposed in the first cavity for isolating the gap from the inlet. Either the rotor, the shaft, or a combination thereof, are equipped with a first compensating chamber for holding a compensating fluid. The first compensating chamber fluidly communicates with the gap. A movable barrier is disposed in the first compensating chamber for isolating the compensating fluid. At least one port extend, through the rotor for communicating drilling fluid pressure to the compensating fluid via the movable barrier.
Eason Raju
Thorp Richard
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
Apparatus and method for pressure-compensated telemetry and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for pressure-compensated telemetry and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for pressure-compensated telemetry and... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1864648