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Patent Searching and Data


Title:
STATIC PUSH-TYPE ROTARY DIRECTIONAL DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/050141
Kind Code:
A3
Abstract:
A static push-type rotary directional device, comprising: a mandrel (12) having a central through-channel, a circumferential groove (12b) being provided on the outside wall of said mandrel (12); an external sleeve (14) provided in said groove (12b) and able to rotate independently; a clutch (18) able to cut-off or to transmit power transmitted from the mandrel to the external sleeve. In the static push-type rotary directional device of the present invention, biasing force can be omitted from the hold, vertical, and horizontal sections without reducing the moment of inertia of the device or the amount of energy stored therein, thereby allowing for effective and stable drilling by the drill bit positioned downstream from the device.

Inventors:
YANG JINZHOU (CN)
XIAO HONGBING (CN)
WU ZHONGHUA (CN)
ZHU JIERAN (CN)
HAN LAIJU (CN)
LI ZUOHUI (CN)
ZHOU YANJUN (CN)
TANG ZHIJUN (CN)
Application Number:
PCT/CN2015/089713
Publication Date:
May 26, 2016
Filing Date:
September 16, 2015
Export Citation:
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Assignee:
SINOPEC SHENGLI PETROLEUM ENGINEERING CO LTD DRILLING TECHNOLOGY RES INST (CN)
International Classes:
E21B7/08; E21B7/04; E21B44/00
Foreign References:
CN204266921U2015-04-15
CN102233446A2011-11-09
CN101454532A2009-06-10
US20070256865A12007-11-08
US20110284292A12011-11-24
CN101946058A2011-01-12
Attorney, Agent or Firm:
DONGYING SHUANGQIAO PATENT AGENT CO., LTD (NO.228 nanyi road,,Dongcheng distric, Dongying Shandong 1, CN)
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