FLOATING SPACING ADJUSTMENT-TYPE REVERSE WELL DRILLING RIG

WIPO Patent Application WO/2020/093269

A1

A floating spacing adjustment-type reverse well drilling rig, comprising a base support (1), a telescopic mechanism (2), a drill rod (4), a drill bit (5), and a T-shaped adjustment screw (10). An adjustment structure of a floating spacing of an outer ring sleeve (81) is added to the reverse well drilling rig. An adjustment groove (821) and an adjustment screw hole (822) are provided on an inner ring sleeve (82). One end of the T-shaped adjustment screw (10) penetrates the adjustment groove (821) and is then threaded and connected in the adjustment screw hole (822). One end of the T-shaped adjustment screw (10) extends between an inner side of the inner ring sleeve (82) and an outer side of a clamping plate (83), and the other end of the T-shaped adjustment screw (10) is located in the adjustment groove (821). In the foregoing manner, the distance between the T-shaped adjustment screw (10) and the clamping plate (83) is the floating distance between the outer ring sleeve (81) and the inner ring sleeve (82), such that the objective of being able to control the spacing is achieved, and the present invention is thus more flexible to use.

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ZHAO JUNXIAN (CN)

PCT/CN2018/114365

May 14, 2020

November 07, 2018

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JIANGSU HEXIN PETROLEUM MACHINERY CO LTD (CN)

E21B10/62; E21D3/00

CN107905735A	2018-04-13
CN107905734A	2018-04-13
CN107905724A	2018-04-13
CN104989272A	2015-10-21
CN108474238A	2018-08-31
US4114698A	1978-09-19

JIANGSU YINCHUANG LAW FIRM (CN)

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