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Title:
MECHANICAL AND HYDRAULIC DUAL-EFFECT EXPANSION DEVICE FOR WELL DRILLING WITH EXPANDABLE TUBULAR TECHNOLOGY
Document Type and Number:
WIPO Patent Application WO/2017/114149
Kind Code:
A1
Abstract:
A mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology. The device comprises: an anchor (1) having a lower end connected to an upper end of an insertion connection tube (12) via a coupling (11); a hydraulic cylinder assembly (2) comprising a hydraulic cylinder (21), and a plunger tube (22) movably disposed and passing through an inner cavity of the hydraulic cylinder (21), wherein the hydraulic cylinder (21) has an upper end connected to the insertion connection tube (12) via a cylinder adjustment cover (23), and a lower end tightly fitted with the plunger tube (22), the plunger tube (22) passes through an inner cavity of the cylinder adjustment cover (23), and has an upper end inserted in the insertion connection tube (12) and tightly fitted with an inner surface of the insertion connection tube (12), the plunger tube (22) is provided with a protrusion ring (221) on an outer wall, the protrusion ring (221) separates the inner cavity of the hydraulic cylinder (21) into an upper chamber (211) and a lower chamber (212), and a liquid incoming hole (222) in communication with the lower chamber (212) is also provided on a side wall of the plunger tube (22); and a variable-diameter expansion cone assembly (2) comprising a sealed cone portion (31) and a variable-diameter expansion cone portion (32), wherein the sealed cone portion (31) has an upper end connected to a lower end of the plunger tube (22) and a lower end connected to an upper end of the variable-diameter expansion cone portion (32). The mechanical and hydraulic dual-effect expansion device can safely and reliably facilitate completion of construction operations of expandable tubulars in a casing and an openhole system.

Inventors:
XU BINGGUI (CN)
YIN HONGWEI (CN)
GUO HUIJUAN (CN)
LIU ZHITONG (CN)
LV MINGJIE (CN)
WANG JIANLI (CN)
LI QIANG (CN)
KANG PENG (CN)
JIA TAO (CN)
WANG XUE (CN)
TIAN YI (CN)
WANG AIGUO (CN)
Application Number:
PCT/CN2016/109620
Publication Date:
July 06, 2017
Filing Date:
December 13, 2016
Export Citation:
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Assignee:
CHINA NAT PETROLEUM CORP (CN)
CNPC DRILLING RES INST (CN)
International Classes:
E21B29/10; E21B43/10
Foreign References:
CN105484695A2016-04-13
CN205382907U2016-07-13
CN203175447U2013-09-04
CN101906947A2010-12-08
CN202970565U2013-06-05
CN102305053A2012-01-04
US20050194127A12005-09-08
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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