Title:
CABLE-TYPE HYDRAULIC JAR
Document Type and Number:
WIPO Patent Application WO/2020/151249
Kind Code:
A1
Abstract:
Disclosed is a cable-type hydraulic jar, comprising an upper connector assembly (1), a balance accelerating assembly (2), a jarring assembly (3) and a lower connector assembly (4) connected in sequence. The upper connector assembly (1) and the lower connector assembly (4) are mechanically and electrically connected to an upper instrument and a lower instrument respectively, energy is stored by the balance accelerating assembly (2), and a jarring action is completed by the jarring assembly (3). According to the cable-type hydraulic jar, when an instrument string gets stuck, by pulling a cable upwards, a jarring shaft (3-9) moves upwards and a jarring hammer (3-19) also moves upwards, hydraulic oil inside a housing of the jarring assembly is compressed, a certain pressure is generated inside the housing of the jarring assembly and the hydraulic oil flows to a restoring piston (3-11) through an elongated hole, the restoring piston (3-11) pushes a push sleeve (3-10) to move under the push of the hydraulic oil, and at this time, a restoring spring (14) is compressed to form a certain resistance, the balance accelerating assembly (2) also storing energy. Thus, the location where the string is stuck can be jarred loose, and finally, the instrument string is lifted out of a shaft. The cable-type hydraulic jar is rationally structured, has a good sticking release effect, and avoids economic loss caused by an instrument getting stuck.
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| JPH0579264 | LARGE BORE HYDRAULIC DRILLING JAR |
| WO/2005/042916 | RUNNING AND CEMENTING TUBING |
Inventors:
LIU JIUZHOU (CN)
WU XIPING (CN)
SUN YAOLONG (CN)
WU XIPING (CN)
SUN YAOLONG (CN)
Application Number:
PCT/CN2019/107937
Publication Date:
July 30, 2020
Filing Date:
September 25, 2019
Export Citation:
Assignee:
XIAN CARNATION ENERGY TECH CO LTD (CN)
International Classes:
E21B31/113
Foreign References:
| CN207554004U | 2018-06-29 | |||
| CN109538150A | 2019-03-29 | |||
| CN109538150A | 2019-03-29 | |||
| CN109630054A | 2019-04-16 | |||
| CN109630055A | 2019-04-16 | |||
| CN109630056A | 2019-04-16 | |||
| CN109611048A | 2019-04-12 | |||
| CN109577899A | 2019-04-05 | |||
| CN206190253U | 2017-05-24 | |||
| CN206376786U | 2017-08-04 | |||
| US3851717A | 1974-12-03 | |||
| US20160102515A1 | 2016-04-14 |
Attorney, Agent or Firm:
XI'AN TONG DA PATENT AGENCY CO., LTD. (CN)
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