US 11,988,055 B2
Controllable downhole drilling and completion tool separating device and their method of use
Gao Li, Chengdu (CN); Pan Fang, Chengdu (CN); Dong Xiao, Chengdu (CN); Hongtao Li, Chengdu (CN); Xu Yang, Chengdu (CN); Yongjie Li, Chengdu (CN); Yangyang Xu, Chengdu (CN); and Guo Liu, Chengdu (CN)
Assigned to SOUTHWEST PETROLEUM UNIVERSITY, Chengdu (CN)
Filed by Southwest Petroleum University, Chengdu (CN)
Filed on Jan. 3, 2023, as Appl. No. 18/092,770.
Claims priority of application No. 202210636386.X (CN), filed on Jun. 7, 2022.
Prior Publication US 2023/0392464 A1, Dec. 7, 2023
Int. Cl. E21B 23/06 (2006.01); E21B 31/12 (2006.01)
CPC E21B 23/06 (2013.01) [E21B 31/12 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A controllable downhole drilling and completion tool separating device, comprising an upper mandrel connector, an outer sleeve, a claw clamp sleeve, a claw clamp locking ring, a mandrel sleeve, a lower connector, a piston ring and a pressure bearing ball, wherein
an upper end of the lower connector is arranged on an outer side of the upper mandrel connector in a sleeving mode, and a first annular cavity is formed between the lower connector and the upper mandrel connector; the piston ring is arranged on the outer side of the upper mandrel connector in a sleeving mode and located in the first annular cavity;
the claw clamp sleeve and the outer sleeve are sequentially arranged on the outer side of the upper mandrel connector in a sleeving mode, and a second annular cavity is formed between the claw clamp sleeve and the upper mandrel connector; the first annular cavity is communicated with the second annular cavity; the claw clamp locking ring is arranged on the outer side of the upper mandrel connector in a sleeving mode, and located in the second annular cavity; the claw clamp locking ring is connected to the upper mandrel connector through a pin;
the mandrel sleeve is arranged on the outer side of the upper mandrel connector in a sleeving mode, and located between the claw clamp locking ring and the piston ring;
a size of the pressure bearing ball is adaptive with an inner diameter of the lower connector;
the outer sleeve is arranged on an outer side of the lower connector in a sleeving manner; and
the upper mandrel connector is provided with a through hole therein, wherein the through hole is provided with a bypass hole at a position corresponding to the first annular cavity, and the bypass hole corresponds positionally to the piston ring,
wherein the first annular cavity and the second annular cavity have a same size.