Title:
MECHANICAL-HYDRAULIC INTEGRATED RELEASING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/076282
Kind Code:
A1
Abstract:
Disclosed is a mechanical-hydraulic integrated releasing device, comprising an upper joint (1), a lower joint (8) and a pawl (12). The upper joint (1) and the lower joint (8) are respectively connected to two ends of the pawl (12); an outer side of the pawl (12) is fitted over a releasing sleeve (6) capable of moving in an axial direction of the pawl, a step is arranged on an outer wall of a ratchet of the pawl (12), a groove matching the step is arranged on an inner wall of the releasing sleeve (6), and the step and the groove cooperate to limit the pawl (12); a releasing sleeve upper end (3) is arranged between the releasing sleeve (6) and the upper joint (1), one end of the releasing sleeve upper end (3) is inserted into the releasing sleeve (6), and the other end is fitted over an outer portion of the upper joint (1) and connected to the upper joint (1) via a start pin (9); and a pressure cavity is formed between the upper joint (1) and the releasing sleeve upper end (3), a hydraulic cavity is arranged in the upper joint (1), and two pressure transmission holes (13), which are in communication with the pressure cavity, are symmetrically arranged on a side wall of the hydraulic cavity in the radial direction. The problems that a mechanical releasing device is poor in resistance to tension and the reliability of a hydraulic releasing device is not high in the prior art are solved by the provided mechanical-hydraulic integrated releasing device.
Inventors:
ZOU WEI (CN)
ZHANG MENGHUA (CN)
LIU LIAN (CN)
WANG BOWEI (CN)
FAN LINGYUN (CN)
XIE JIN (CN)
ZHOU SHENGFU (CN)
LI WENXIA (CN)
YANG KUN (CN)
ZHANG MENGHUA (CN)
LIU LIAN (CN)
WANG BOWEI (CN)
FAN LINGYUN (CN)
XIE JIN (CN)
ZHOU SHENGFU (CN)
LI WENXIA (CN)
YANG KUN (CN)
Application Number:
PCT/CN2016/103780
Publication Date:
May 03, 2018
Filing Date:
October 28, 2016
Export Citation:
Assignee:
CHINA PETROLEUM & CHEMICAL CORP LTD (CN)
International Classes:
E21B23/00
Foreign References:
| CN106545306A | 2017-03-29 | |||
| CN203742500U | 2014-07-30 | |||
| CN105019846A | 2015-11-04 | |||
| CN201078206Y | 2008-06-25 | |||
| CN201262045Y | 2009-06-24 | |||
| US20100096123A1 | 2010-04-22 |
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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