Wellhead fixing device applicable to oil and gas exploitation

Abstract

The invention discloses a wellhead fixing device applicable to oil and gas exploitation. The wellhead fixing device comprises an overground bracket installed above a wellhead, a well wall fixing mechanism in connection with the overground bracket is arranged in the wellhead, and the well wall fixing mechanism comprises two arcuate frames; one sides, in the vertical direction, of the two arcuate frames are hinged to each other, the other sides of the two arcuate frames are fixed through mounting mechanisms, and wire mesh is laid on the arcuate frames and matched with the well wall surface. A plurality of plug pins are fixed to the lower ends of the arcuate frames, the plug pins form an annular structure around the axis of the wellhead, and the plug pins are perpendicular to the arcuate frames and located at the outer convex sides of the arcuate frames. By means of the wellhead fixing device, the problems that gravel is likely to fall from the well wall and thus well bottom exploitation is influenced are solved; the goal that the wellhead fixing device has a good effect of well wall fixing and can be used repeatedly is achieved.

Description

technical field [0001] The invention relates to the technical field of oil well exploitation, in particular to a wellhead fixing device suitable for oil and gas exploitation. Background technique [0002] The problem of wellbore instability is accompanied by worldwide major engineering technical problems in the process of oil drilling and well completion. For more than half a century, the stability of shaft walls has been a hot issue that scholars and engineers at home and abroad have generally paid attention to. Through unremitting efforts, although great progress has been made, it has not yet been completely resolved. In particular, with the application of contemporary extended-reach drilling technology, gas drilling horizontal well technology, slim well drilling technology, branched multi-bottom well drilling technology, hose drilling technology and underbalanced drilling technology, the problem of wellbore instability has become increasingly difficult in some The situat...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a wellhead fixing device suitable for oil and gas exploitation, to solve the problem that the well wall is easy to drop gravel and affect the bottom well mining; to achieve the purpose of a well wall fixing device that has a good fixing effect and can be used repeatedly

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