Modular anti-rotation drilling systems and methods
| DWPI Title: Modular anti-rotation device for preventing rotation with respect to central axis of drilling tool in borehole, has roller connected at distal end of upper and lower yoke assemblies, where roller is movable in rotational direction |
| Abstract: Drilling tools are frequently subject to rotation with respect to the central drilling axis caused by torque. A mechanical linkage can be configured to apply force that is proportional to the weight-on-bit on the borehole surface while transmitting axial loads used to generate weight-on-bit. The device can be used to manage drill string twist that could lead to drilling dysfunctions. |
| Use: Modular anti-rotation device used for drilling a borehole in an earth formation. |
| Advantage: The device allows the weight-on-bit required for drilling to be applied while also managing the drill string twist that leads to drilling dysfunctions such as stick-slip. The coulomb friction at the interface allows torque to be reacted without any rotation of the device or the drill pipe above the device. The device is able to adapt to and function in different borehole sizes because the links automatically expand under load until they contact the borehole wall. |
| Novelty: The modular anti-rotation device (10) comprises an upper and lower fixtures that are connected by two yoke assemblies (16). A roller (22) is connected at each distal end of the yoke assembly. The roller is moved in rotational relationship radially for axial displacement of the device in a vertical direction in a borehole (30) with a diameter as a drill shaft to penetrate downwardly in rock or other material to extend the borehole. The rollers are moved to travel in an axial direction as the drill shaft to penetrate into the drill borehole in rolling engagement vertically with a bore hole surface. |
| Filed: 11/10/2017 |
| Application Number: US15809639A |
| Tech ID: SD 14365.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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