E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 47/16 (2006.01) E21B 47/12 (2006.01)
Patent
CA 2546398
An apparatus, system, and method for transmitting measurements while drilling are adapted for use with a drill string equipped with a mud motor. The drill string may comprise a plurality of interconnected drill pipe joints or a plurality of interconnect casing joints. The apparatus comprises a measurement-while-drilling tool adapted for placement in the drill string beneath the mud motor. The measurement-while-drilling tool has a system for transmitting telemetry signals, such as mud-pulse telemetry signals, upwardly through the mud motor and the drill string. In particular embodiments, the measurement-while-drilling tool has a system for transmitting mud-pulse telemetry signals upwardly through the mud motor and the drill string at frequencies below approximately 1 Hz, although other frequencies may be employed to advantage. The apparatus may further comprise a rotary steerable system for placement in a drill string beneath the mud motor. The rotary steerable system may be a point- the-bit system or a push-the-bit system. In particular embodiments, the rotary steerable system and a measurement-while-drilling tool are integrated.
Schlumberger Canada Limited
Smart & Biggar
LandOfFree
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