Title:
HYDRAULIC GENTLE VIBRATION SPEED ACCELERATION DRILL TOOL
Document Type and Number:
WIPO Patent Application WO/2017/005197
Kind Code:
A1
Abstract:
A hydraulic gentle vibration speed acceleration drill tool used for accelerating the drilling speed of a drill bit. The drill tool consists of an upper joint (1), a power assembly, a flow regulating valve assembly, and a force transmission assembly. The upper end of an outer casing (2) of the power assembly is connected to the upper joint (1) through screw threads. The lower end of the outer casing of the power assembly is an inner step of an octagonal hole structure and is used for limiting the lower joint (16). The middle section of the lower joint is of an outer octagonal structure. The lower end of the lower joint (16) is connected to an adaptor joint (17) through screw threads. The power assembly adopts a turbine set or a screw rod motor structure, and generates a driving force under a hydraulic effect to drive an upper rotating shaft (19) to rotate. The upper rotating shaft (19) is arranged on a bearing ring (7). The lower end of the upper rotating shaft is connected with a lower rotating shaft (14) through screw threads. The flow regulating valve assembly consists of the lower rotating shaft (14) and a flow regulating valve base (15). The fluid regulating valve base (15) is arranged at the upper end of the lower joint (16). The drill tool exerts a gentle pulsating load with a certain frequency on a drill bit, thereby improving the dynamic characteristics of the drill bit, prolonging the service life of the drill bit, and improving the drilling efficiency.
Inventors:
ZHU XIAOHUA (CN)
JING JUN (CN)
JING JUN (CN)
Application Number:
PCT/CN2016/089004
Publication Date:
January 12, 2017
Filing Date:
July 07, 2016
Export Citation:
Assignee:
UNIV SOUTHWEST PETROLEUM (CN)
International Classes:
E21B4/16
Foreign References:
CN105041201A | 2015-11-11 | |||
CN201778652U | 2011-03-30 | |||
CN201554363U | 2010-08-18 | |||
CN2113332U | 1992-08-19 | |||
CN103821452B | 2016-01-20 | |||
JP2003074280A | 2003-03-12 |
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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