Top-recoverable whipstock and using method thereof

Abstract

The invention provides a top-recoverable whipstock and a using method and application thereof. The outer wall of the tail end of an upper guider is connected with the head end of a connecting key through a fastening bolt, the outer wall of the head end of a lower guider is connected with the tail end of the connecting key through a shearing bolt, a whipstock mandrel is arranged in the lower guider, the head end of the whipstock mandrel is in threaded connection with the inner wall of the tail end of the upper guider, the tail end of the whipstock mandrel extends out of the tail end of the lower guider and is in threaded connection with a setting sleeve, the outer wall of the tail end of the lower guider is connected with the inner wall of an anchor upper connector through a shear pin, an anchor mandrel is further arranged between the setting sleeve and the anchor upper connector, and an anchor piston is arranged between the anchor upper connector and the anchor mandrel. After windowing sidetrack drilling operation is completed, a well completion tool can be directly put in, well completion operation is conducted on a branch well, the time for putting back a tie-back tool and a guiding tool independently is omitted, and meanwhile the risk that the tie-back tool is inaccurate in positioning is avoided.

Description

technical field [0001] The invention relates to the technical field of manufacturing special equipment for oil and gas engineering drilling and completion, and more specifically relates to a top recoverable tilter and its use method and application. Background technique [0002] The technology of directional wells and horizontal wells has been perfected day by day. However, due to the limitation of the number of notches on the platform, it is impossible to increase the number of wells arbitrarily. Its secondary use has high flexibility and has been paid more and more attention. The retrievable skewer is the key tool of window sidetracking technology, and plays a vital role in the drilling and completion of lateral wells. [0003] The one-piece skewer in the prior art is solid, and the main wellbore cannot be lowered into the production string after the sidetracking of the window is completed, and the remaining oil in the well cannot be recovered; moreover, the completion of...

AI Technical Summary

Problems solved by technology

[0004] The invention overcomes the deficiencies in the prior art. The existing skewer is solid. After the sidetracking of the window is completed, the main wellbore cannot be lowered into the production string, and the remaining oil in the well cannot be recovered; During the well operation, the tie-back tool and the steering tool need to be lowered separately. The whole operation process is complicated and the risk is high. A top retrievable tilter and its use method and application are provided to solve the problem of sidetracking in window openings. The problem that the main wellbore cannot be completed after the completion of the main wellbore. After the window sidetracking operation is completed, the present invention can directly run the completion tool to complete the branch well, eliminating the need to separately run the tie-back tool and guide tool timing while avoiding the risk of inaccurate positioning of tieback tools

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