Knobbe, Martens, Olson & Bear, LLP
Mechanical-hydraulic integrated releasing device
A mechanical-hydraulic integrated releasing device includes an upper joint, a lower joint and a pawl. The upper joint and the lower joint are respectively connected to two ends of the pawl. An outer side of the pawl is sleeved with a releasing sleeve capable of moving in an axial direction of the pawl. A step is arranged on an outer wall of a ratchet of the pawl. A groove matching the step is arranged on an inner wall of the releasing sleeve, and the step and the groove cooperate to limit the pawl. A releasing sleeve upper portion is arranged between the releasing sleeve and the upper joint, one end of the releasing sleeve upper portion is inserted into the releasing sleeve, and the other end is sleeved on an outer portion of the upper joint and connected to the upper joint via a start pin.
CHINA PETROLEUM & CHEMICAL CORPORATION LTD.
E E E
E21B E21B E21B
inventional inventional inventional
Shengfu Kun Lian Jin Wenxia Wei Bowei Menghua Lingyun
Zhou Yang Liu Xie Li Zou Wang Zhang Fan