Downhole adjustable mud motor

摘要

A downhole adjustable mud motor for boring wellbores, such as a hole in the earth. The downhole adjustable mud motor has a progressive cavity power section with a power cavity end, wherein the progressive cavity power section has a rotor rotatably captured within a stator and a plurality of fluid flow paths between the stator and the rotor for flowing drilling fluid. A power transmission section can be connected to the power cavity end having a central axis and an offset axis. A first adjustable member can be fastened to the stator. A second adjustable member can have a locking member, a bearing assembly connecting to the transmission assembly, and a fastener operatively connected to the bearing assembly. The locking member prevents compression of the second adjustable member inside of the first adjustable member when drilling fluid flows through the downhole adjustable mud motor.

主权项

1. A downhole adjustable mud motor for boring a hole in the earth comprising:
a. a progressive cavity power section with a power cavity first end, the progressive cavity power section comprising:
1. a rotor rotatably captured within a stator; and2. a plurality of fluid flow paths between the stator and the rotor for flowing drilling fluid; and b. a power transmission section connected to the power cavity first end, having an axis and an offset axis, the power transmission section comprising:
1. a transmission assembly engaging the rotor;2. a first adjustable member fastened to the stator;3. a second adjustable member configured to simultaneously slide and rotate within the first adjustable member, wherein the second adjustable member comprising a locking member;4. a bearing assembly connected to the transmission assembly; and5. a fastener operatively connected to the bearing assembly; and c. a pressure control valve located in a sub, wherein the sub is fastened to the stator, wherein the pressure control valve is configured to receive the drilling fluid from a surface location and transfer the drilling fluid to the stator.