Waterproof guide pipe device with protective pipe and using method of waterproof guide pipe device

Abstract

The invention discloses a waterproof guide pipe device with a protective pipe and a using method. The waterproof guide pipe device comprises a pipe body, the protective pipe arranged outside the pipe body in a sleeving mode, a female connector installed on the lower portion of the pipe body, a feeding male connector and a tie-back male connector, wherein a wedge block is mounted on the pipe body; a protective tube cap covers the upper end surface of the protective tube; a fishing lug for feeding and tieback is arranged in the protective tube cap in a sleeving mode; an anti-rotation insertion block is inserted between the female connector and the feeding male connector; the female connector and the tie-back male connector are locked together through a locking ring; and a quioning corner used for preventing the anti-rotation insertion block from moving upwards is arranged in the anti-rotation insertion block, and the upper end of the quioning corner is connected with a steel wire rope. According to the device, two modes of permanent well abandoning and development well transferring are considered, and when the well is not converted into a development well, a drilling ship does not need to be mobilized for discarding; when the well is converted into a development well, wellhead tie-back can be conducted on the well, development is smooth, and the treatment scheme of the exploratory well meets the permanent discarding standard; and therefore oil-gas exploration and development cost is greatly reduced, and rolling exploration and development of oil and gas fields are achieved.

Description

technical field [0001] The invention belongs to the field of offshore oil and gas engineering, and in particular relates to a water riser conduit device with a protective pipe and a use method thereof. Background technique [0002] In the initial stage of exploration and development of offshore oil and gas fields, in order to evaluate the value of oil reservoirs, it is necessary to complete a large number of exploration drilling wells. [0003] After the current exploration and evaluation operation is completed, two abandonment modes are generally adopted: temporary well abandonment mode or permanent well abandonment mode. Among them, the temporary well abandonment mode refers to a series of well closure and safety disposal operations that temporarily suspend offshore operations in order to return to the well to continue operations; the temporary well abandonment mode has the advantage of retaining the wellhead and facilitating subsequent conversion into production wells, bu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a water riser device with protective pipe and its use method, so as to solve the technical problem of both permanent well abandonment and transfer to development well

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