Title:
COMPOUND PERFORATOR WITHOUT BODY
Document Type and Number:
WIPO Patent Application WO/2007/031001
Kind Code:
A1
Abstract:
A compound perforator without body includes an igniting head, a detonating cord
and a perforating part. The perforating part consists of several serially connected
perforating units, and each of the perforating units possesses one bullet clip
and one bullet connected to the detonating cord. The bullet clip is made of fragile
metal material and has powder column around it. During construction, the detonating
cord is detonated with the electric detonator electrically and the bullet is
then detonated to complete perforation. The explosion of the detonating cord
and the bullet ignites the powder column and the burnt gas reaches its peak pressure
in short time to obtain excellent perforating and crack extending effect, while
crushing the bullet clip to avoid subsequent damage on the well.
Inventors:
ZHANG GUOAN (CN)
ZHOU ZHIHUA (CN)
ZHOU ZHIHUA (CN)
Application Number:
PCT/CN2006/002216
Publication Date:
March 22, 2007
Filing Date:
August 29, 2006
Export Citation:
Assignee:
XI AN TONGYUAN PETROTECH CO LT (CN)
ZHANG GUOAN (CN)
ZHOU ZHIHUA (CN)
ZHANG GUOAN (CN)
ZHOU ZHIHUA (CN)
International Classes:
E21B43/116
Foreign References:
| US4951744A | 1990-08-28 | |||
| CN2309419Y | 1999-03-03 | |||
| US4253523A | 1981-03-03 | |||
| US6062310A | 2000-05-16 | |||
| CN2485422Y | 2002-04-10 | |||
| CN2818774Y | 2006-09-20 | |||
| CN2464937Y | 2001-12-12 | |||
| US4467878A | 1984-08-28 | |||
| US4496009A | 1985-01-29 | |||
| US5701964A | 1997-12-30 | |||
| US5095999A | 1992-03-17 |
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (Scitech Place No.22, Jian Guo Men Wai Ave, Chao Yang District Beijing 4, CN)
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