Title:
COILED TUBING FRACTURING MULTISTAGE TOOL STRING AND UTILIZATION METHOD
Document Type and Number:
WIPO Patent Application WO/2016/033983
Kind Code:
A1
Abstract:
A coiled tubing fracturing multistage tool string and a utilization method thereof. A joint (1), a releaser (2), a centralizer (3), a spray gun (4), a balance valve (5), a bottom packer (6), a friction joint (7), a collar locator (8) and a guide shoe (9) are connected to form the tool string. The joint (1) and a connecting tube are connected at the top of the whole tool string. The spray gun (4) and the balance valve (5) are positioned above the bottom packer (6). The balance valve (5) isolates the internal channels of the upper string (601) and lower string (611) of the bottom packer (6) when the tool string is seated, and the balance valve (5) communicates the internal channels of the upper string (601) and the lower string (611) of the bottom packer (6) when the tool string is lifted. Due to the arrangement of the balance valve (5) and the bottom packer (6), when the fracturing tool string is lifted after modification of one target stratum, a sealing element of the balance valve (5) is in an opening position and the upper string (601) and the lower string (611) of the bottom packer (6) are communicated, so that pressure is balanced and work time is shortened.
Inventors:
NING SHIPIN (CN)
MEI PENG (CN)
HAN TAO (CN)
MENG FANCHAO (CN)
MEI PENG (CN)
HAN TAO (CN)
MENG FANCHAO (CN)
Application Number:
PCT/CN2015/077758
Publication Date:
March 10, 2016
Filing Date:
April 29, 2015
Export Citation:
Assignee:
JEREH ENERGY SERVICES CORP (CN)
International Classes:
E21B43/26; E21B43/114; E21B43/27
Foreign References:
| CN204060661U | 2014-12-31 | |||
| CN102562019A | 2012-07-11 | |||
| CN101173607A | 2008-05-07 | |||
| US20060000620A1 | 2006-01-05 | |||
| US20120118579A1 | 2012-05-17 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
北京集佳知识产权代理有限公司 (CN)
北京集佳知识产权代理有限公司 (CN)
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