Title:
A DRILLING DEVICE USING A JET OF HIGH PRESSURE
Document Type and Number:
WIPO Patent Application WO/2002/018741
Kind Code:
A1
Abstract:
This invention discloses a drilling device using a drilling fluid jet of the high pressure. The device comprises a drilling rod (1), a turbine (2), a speed-increasing unit (3) and a drilling bit (6) attached to the end of said drilling rod (1). The input shaft of said speed-increasing unit (3) are connected to the output shaft of said turbine (2). The device further includes a multistage centrifugal pump (5) driven by said speed-increasing unit (3). The outlet of said pump (5) is connected to the nozzle provided on said bit (6) that includes a back-flow opening. Since the multistage pump (5) can produce a drilling fluid jet with high pressure, the cutting efficiency of the drilling fluid can be improved because the drilling fluid can contain solids of large size.
Inventors:
JIN FENG (CN)
PENG FANGYUAN (CN)
DENG KEXIAN (CN)
KANG LEI (CN)
HE JIANJUN (CN)
PENG FANGYUAN (CN)
DENG KEXIAN (CN)
KANG LEI (CN)
HE JIANJUN (CN)
Application Number:
PCT/CN2001/000882
Publication Date:
March 07, 2002
Filing Date:
May 30, 2001
Export Citation:
Assignee:
JIN FENG (CN)
PENG FANGYUAN (CN)
DENG KEXIAN (CN)
KANG LEI (CN)
HE JIANJUN (CN)
PENG FANGYUAN (CN)
DENG KEXIAN (CN)
KANG LEI (CN)
HE JIANJUN (CN)
International Classes:
E21B7/18; (IPC1-7): E21B10/18
Foreign References:
| CN2244096Y | 1997-01-01 | |||
| CN1099456A | 1995-03-01 | |||
| CN2093894U | 1992-01-22 | |||
| CN1046015A | 1990-10-10 | |||
| US3882946A | 1975-05-13 | |||
| US4819745A | 1989-04-11 |
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (8th floor 2 Fuchengmenwai street, Beijing 7, CN)
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