Articulated coupling for use with a downhole drilling aparatus

Details Articulated coupling for use with a downhole drilling aparatus Articulated coupling for use with a downhole drilling aparatus

E - Fixed Constructions

21

B

E21B 7/04 (2006.01) E21B 4/02 (2006.01) E21B 7/06 (2006.01) E21B 17/20 (2006.01) F04C 2/107 (2006.01) F16D 3/48 (2006.01)

Patent

CA 2061784

- 39 - ABSTRACT A downhole drilling apparatus which includes a drive train having a downhole motor device and a coupling for permitting bending of the drive shaft to accommodate directional drilling. The coupling includes two distinct portions. The first portion transmits torque only and the second portion transmits thrust only. Thus, the cou- pling transmits torque and thrust through different por- tions. This makes it possible to optimize the coupling design to allow bending while still being able to trans- mit the loads experienced downhole. The downhole motor may be a progressive cavity device, a turbine-type down- hole motor or another type of downhole motor such as an electric motor.

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