Novel method and equipment for removing jamming by explosion break-outing for extended reach wells and horizontal wells
A technology for extended-reach wells and horizontal wells, which is used in wellbore/well components, earth-moving drilling, etc., and can solve the problems of scrapped wellbore, inability to overcome the friction of pipes, and inability of detonating cord to be transported to a predetermined position, etc. To achieve the effect of eliminating stuck pipe accidents, shortening the processing time of accidents, and saving production costs
Active Publication Date: 2013-12-04
PETROCHINA CO LTD
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Problems solved by technology
[0002] Conventional stuck pipe accidents are often dealt with by detonation and release, and most of them use instrument trucks, relying on the tool’s own weight, and the method of soft cable delivery. In the case of a drilling accident, if the conventional method is used to run in by pumping and the self-weight of the instrument, the friction force of the pipe cannot be overcome in the high-inclination and horizontal section, and the detonating cord is often unable to be transported to the predetermined position, resulting in the wellbore being scrapped
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[0014] A kind of extended-reach well and horizontal well unclamping explosion loosening equipment according to the present invention is composed of a special conveying device connection string 17, an explosive loosening instrument 22 and auxiliary equipment 23; the auxiliary equipment 23 is composed of a cable 15, a cable instrument engineering vehicle 14 and pulley 16 constitute; Cable 15 is arranged in the ground cable instrument engineering car 14, and cable 15 is connected with special conveying device connecting string 17 upper ends by pulley 16; The fastening instrument 22 is sequentially composed of a magnetic positioning instrument 18, a safety explosive joint 19, and a detonating cord 20 connected in series; the explosive loosening instrument 22 is placed in the drill pipe 21;
[0015] The special conveying device connection string is formed by connecting multiple conveying devices in series; the conveying device consists of copper cable socket A1, bakelite sheath A2, ...
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The invention relates to a novel method and equipment for removing jamming by explosion break-outing for extended reach wells and horizontal wells. An explosion break-outing device is connected with a special conveying device connecting string, and the flexible special conveying device connecting string connected with a ground cable is capable of conveying the explosion break-outing device to the jamming position of a drilling tool, and jamming is removed by explosion. The special conveying device connecting string is a flexible connecting mechanism, capable of conveying the explosion break-outing device to a preset position, free of affection of inclination and positions of the wells, and capable of bearing a certain axial pressure, and can overcome friction resistance of pipes at the horizontal section to convey the explosion break-outing device to the preset position, and accordingly, the defect that the explosion break-outing device cannot be in place when conveyed by cables is overcome, jamming can be removed in time, production cost is saved and time for handling accidents is shortened.
Description
technical field [0001] The invention relates to a jam-releasing explosive unclamping method and equipment for accident handling of oil and gas well drilling engineering such as extended-reach wells and horizontal wells. Background technique [0002] Conventional stuck pipe accidents are often dealt with by detonation and release, and most of them use instrument trucks, relying on the tool’s own weight, and the method of soft cable delivery. In the case of a drilling accident, if the conventional method is used to run in by pumping and the self-weight of the instrument, the friction force of the pipe cannot be overcome in the high-inclination and horizontal section, and the detonating cord is often unable to be transported to the predetermined position, resulting in the failure of the wellbore. Contents of the invention [0003] The purpose of the present invention is to provide a new method for large-displacement wells and horizontal wells to release jamming and explosion ...
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IPC IPC(8): E21B23/00
Inventor 汤新国周明信刘金生陈大伟常凯铭白殿刚陈佳杰单桂栋齐月魁袁照永张长生张晓常青忠汤杰雄齐振
Owner PETROCHINA CO LTD