US 11,053,755 B2
Iron roughnecks for non-stop circulation system
Zaurayze Tarique, Calgary (CA); Blaine Dow, Sugar Land, TX (US); and Justin Cremer, Houston, TX (US)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 16/478,844
Filed by SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
PCT Filed Jan. 18, 2018, PCT No. PCT/US2018/014123
§ 371(c)(1), (2) Date Jul. 17, 2019,
PCT Pub. No. WO2018/136571, PCT Pub. Date Jul. 26, 2018.
Claims priority of provisional application 62/447,725, filed on Jan. 18, 2017.
Prior Publication US 2020/0056433 A1, Feb. 20, 2020
Int. Cl. E21B 19/16 (2006.01); E21B 21/10 (2006.01); E21B 21/12 (2006.01); E21B 21/08 (2006.01)
CPC E21B 19/161 (2013.01) [E21B 21/106 (2013.01); E21B 19/165 (2013.01); E21B 19/168 (2013.01); E21B 21/085 (2020.05); E21B 21/12 (2013.01); E21B 2200/06 (2020.05)] 16 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a frame;
a wrench unit supported by the frame, wherein the wrench unit is capable of gripping a drill string;
a spinner unit supported by the frame, wherein the spinner unit is capable of engaging and spinning a drill pipe; and
a circulation coupler supported by the frame and movable to an open position or a closed position, wherein the circulation coupler, when positioned around a drill string, having a wall with one or more valves provided therein, and located in the closed position, forms a sealed chamber radially oriented around the one or more valves of the drill string,
wherein the circulation coupler further comprises a sensor for detecting whether a first valve in a drill string is located in an open position or a closed position, and
wherein the first valve, detectable by the sensor, is an external sliding valve, comprising a spring, provided in the wall of the drill string.