Title:
ENERGY-CONCENTRATING AND NEST-SHAPED STRUCTURE-FORMING BUNDLE DEVICE FOR PREVENTING LOST CIRCULATION AND REINFORCING BORE WALL, AND APPLICATION THEREOF IN PREVENTION OF LOST CIRCULATION IN KARST CAVITY
Document Type and Number:
WIPO Patent Application WO/2018/149070
Kind Code:
A1
Abstract:
An energy-concentrating and nest-shaped structure-forming bundle device for preventing lost circulation and reinforcing a bore wall, and application thereof in prevention of lost circulation in a karst cavity. The device comprises an outer slotted metal pipe (1) and an inner nest-shaped structure-forming explosion component. The slotted metal pipe (1) has helical slots (2) or linear slots (3) on a pipe wall thereof. The nest-shaped structure-forming explosive component is a core shaft (5) having several explosion recesses (4). Explosives are placed in the recesses (4). The slotted metal pipe (1) is sleeved and fixed on the core shaft (5). The core shaft (5) is in a loose fit with the slotted metal pipe (1). The present invention can solve the problem in which lost circulation material does not readily remain to form a support, and can improve the success rate of preventing lost circulation.
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Inventors:
ZHANG YIQUN (CN)
LIU YA (CN)
LI GENSHENG (CN)
HUANG ZHONGWEI (CN)
SHI HUAIZHONG (CN)
SONG XIANZHI (CN)
SHENG MAO (CN)
JI LU (CN)
LIU YA (CN)
LI GENSHENG (CN)
HUANG ZHONGWEI (CN)
SHI HUAIZHONG (CN)
SONG XIANZHI (CN)
SHENG MAO (CN)
JI LU (CN)
Application Number:
PCT/CN2017/089096
Publication Date:
August 23, 2018
Filing Date:
June 20, 2017
Export Citation:
Assignee:
UNIV CHINA PETROLEUM BEIJING (CN)
International Classes:
F42D3/00; E21B33/13
Foreign References:
| US20150361759A1 | 2015-12-17 | |||
| CN86105631A | 1987-02-04 | |||
| CN1241711A | 2000-01-19 | |||
| US5564499A | 1996-10-15 | |||
| CN105043180A | 2015-11-11 | |||
| CN202630821U | 2012-12-26 | |||
| KR20100137678A | 2010-12-31 |
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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