Integrated mechanical clamp seal type packer of pump seal and method for preventing tubular column from being bent

Abstract

The invention provides an integrated mechanical clamp seal type packer of a pump seal and a method for preventing a tubular column from being bent. The packer comprises an upper central pipe and a lower central pipe which are connected up and down, an upper outer pipe is sleeved outside the upper central pipe, and at least one rubber sleeve is sleeved outside the upper outer pipe; the lower end of the upper outer pipe is sleeved on a cava outside the lower central pipe, the cava is propped against a cone arranged at the lower end of the cava through mutually matched conical surfaces, and the lower end of the cone is connected with an elastic centralizer body outside the lower central pipe through a blocking sleeve; the upper central pipe is connected with an upper connector above the upper central pipe through a thread, the upper outer pipe is fixed on an upper connecter through a shear pin at the upper end of the upper outer pipe and downwards clamps a rubber sleeve through a clamping platform formed on the upper outer tube, and the lower end of the lower central pipe is connected with a lower connector; and an unblocking locking block is arranged between the inner side of the lower part of the upper outer pipe and the upper central pipe. According to the packer, when an oil layer is mechanically sealed, the tubular column can be prevented from being bent due to an aggravated mechanical packer, so that the construction cost can be further reduced, and the construction efficiency can be improved.

Description

Technical field [0001] The invention relates to a petroleum extraction device, in particular to a pump-sealing integrated mechanical seal packer and a method for preventing bending of a pipe string. Background technique [0002] At present, most of the oil wells in our country are in multiple layers, and oil wells with large differences between the layers need to be separated by packers, and the stratified oil production process string is used for production. The pump-sealing integrated snap-sealing string has the advantages of simple construction and reliable sealing. It has been widely used in major oilfields. However, the mechanical snap packer requires a certain load to be applied to the string, which causes the string to bend. Lead to increased eccentric wear. [0003] After searching, we have not found any similar technical documents that can solve the problem of the bending of the pipe string and the aggravation of eccentric wear during the sealing of the mechanical block p...

AI Technical Summary

Problems solved by technology

The pump-seal integrated sealing pipe string has the advantages of simple construction and reliable sealing, and has been widely used in major oil fields. However, when the mechanical seal packer is set, a certain load needs to be applied to the pipe string, causing the pipe string to bend. lead to increased wear

[0003] After searching, no similar technical literature has been found that can solve the problem of increased eccentric wear caused by the bending of the pipe string when the mechanical seal packer is set.

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