US 12,110,762 B2
Subsurface safety valve and method of operating a subsurface safety valve
Warren Ackroyd, Aberdeen (GB)
Assigned to Expro North Sea Limited, Dyce (GB)
Appl. No. 17/641,717
Filed by Expro North Sea Limited, Aberdeen (GB)
PCT Filed Sep. 9, 2020, PCT No. PCT/EP2020/075228
§ 371(c)(1), (2) Date Mar. 9, 2022,
PCT Pub. No. WO2021/048225, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 1912947 (GB), filed on Sep. 9, 2019.
Prior Publication US 2022/0298887 A1, Sep. 22, 2022
Int. Cl. E21B 34/06 (2006.01)
CPC E21B 34/066 (2013.01) [E21B 2200/05 (2020.05)] 13 Claims
OG exemplary drawing
 
12. A subsurface safety valve, comprising:
an assembly configured to convert rotary motion from an electrically controlled drive into linear motion of a member, the member configured to actuate a valve;
the assembly comprising a gear assembly that includes a one-way clutch configured to allow drive and torque in one rotary direction and configured to freewheel in the other opposition rotary direction;
wherein the one-way clutch comprises a sprag clutch and the sprag clutch is within a spur gear.