A horizontal well drill string feeding tool
A technology for horizontal wells and drill strings, which is applied in earthwork drilling, rotary drilling rigs, boreholes/well components, etc., and can solve problems such as difficulty in feeding drill strings in horizontal wells, and achieve friction reduction and simple control methods Effect
Inactive Publication Date: 2017-12-12
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology
[0004] The purpose of the present invention is to provide a horizontal well drill string feeding tool in order to solve the problem of difficult drilling string feeding in horizontal wells.
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[0012] Such as figure 1 and figure 2 Shown, a kind of horizontal well drilling string feeding tool of the present invention is made of cone tube 1, slip 2, hoop spring 3, screw 4, slip seat 5, upper cylinder body 6, spring 7, cover 8, section Fluid 9, transmission pin 10, lower cylinder body 11, anti-drop end cap 12 and transmission shaft 13; its structural features are: the upper end of the cone cylinder 1 is connected with the upper drill string screw, and the lower end of the transmission shaft 13 is connected with the lower drill string screw Connection; the outer circle of the lower part of the cone 1 is set as a conical surface, and the lower end of the cone 1 is connected with the upper end of the upper cylinder 6 with screws; A ring of protruding steps is set on the outer circle below each through hole; the upper part of the outer surface of the slip 2 is set in a sawtooth shape, and the sawtooth is inclined to the upper end; a groove is set on the lower part of the ...
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The invention relates to a drill stem feeding tool used for a horizontal well section in drilling engineering. The problem that it is difficult to feed a horizontal well drill stem is solved. According to the technical scheme, the upper end of a conical cylinder is in threaded connection with the upper portion of a drill stem, and the lower end of a transmission shaft is in threaded connection with the lower portion of the drill stem; the upper end of the conical cylinder is in threaded connection with the upper end of an upper cylinder body; six screws penetrate through six kidney-shaped through holes in the convex outer edge of a slip bowl respectively and are in threaded connection with six slips, and after being connected with the slips through threads, the screws can slide in the kidney-shaped holes in the slip bowl; a garter spring is installed in grooves in the outer side surfaces of the six slips; a spring is installed on a convex step of an outer circle of the upper cylinder body, and a close cover and the lower end of the slip bowl are in threaded connection; the lower end of a throttling body is in threaded connection with the upper end of the transmission shaft, the upper end of the lower cylinder body is in threaded connection with the lower end of the upper cylinder body, and the lower end of the lower cylinder body is in threaded connection with an anti-falling end cover. Drilling fluid is used for pushing the throttling body and the transmission shaft to move axially, drilling pressure is provided for the lower portion of the drill stem, the drill stem is fed, and the horizontal section drill length can be increased effectively.
Description
technical field [0001] The invention relates to a drill string feeding tool for horizontal well section in drilling engineering. Background technique [0002] In the oil and gas industry, drilling is an important means of the oil and gas reservoir development process. With the technical development of drilling engineering, the application prospects of horizontal wells are broad at present, and horizontal wells are rapidly popularized due to their excellent economy. However, with the continuous extension of the length of the horizontal section of the horizontal well, the frictional resistance between the drill string and the borehole increases continuously, the drill string is difficult to continue to feed, the drill bit is depressurized, and the drill bit is difficult to drill. In order to improve the quality of horizontal wells and give full play to the advantages and characteristics of horizontal wells, it is necessary to continuously increase the length of the horizontal...
Claims
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IPC IPC(8): E21B19/08E21B23/01
CPCE21B19/08E21B23/01
Inventor 张梁梁政赵勇邓严邓兰刘稳
Owner SOUTHWEST PETROLEUM UNIV