Retrievable two-way anchoring screen hanger and retrievable two-way anchoring screen system

Abstract

The invention provides a recyclable bidirectional anchoring sieving pipe hanger and a recyclable bidirectional anchoring sieving pipe system. The recyclable bidirectional anchoring sieving pipe hangercomprises a body, an upper taper sleeve, a lower taper sleeve, a slip assembly, an upper transmitting-loading assembly and a lower recovery sleeve assembly; the upper taper sleeve is connected to theexterior of the body in a sleeving mode; the lower taper sleeve is connected to the exterior of the body in a sleeving mode and located on the lower part of the upper taper sleeve; the slip assemblyis connected to the exterior of the body and connects the upper taper sleeve with the lower taper sleeve; the upper transmitting-loading assembly is connected to the upper end of the body in a sleeving mode and connected with the body through a setting shearing nail, and the lower end of the upper transmitting-loading assembly is connected with the upper taper sleeve and matched with a feed tool to realize setting of the hanger; and the lower recovery sleeve assembly is connected to the lower end of the body in a sleeving mode, connected with the lower taper sleeve and matched with a salvage tool to realize setting removal of the hanger. The whole length of the sieving pipe hanger is smaller, wellhead construction is convenient, the bidirectional anchoring ability is achieved after setting, full drift diameter of a tail pipe can be realized after releasing, recycling and reusing of a sieving pipe can further be achieved, and the cost is saved.

Description

technical field [0001] The invention relates to the technical field of geothermal well cementing and completion, in particular to a retrievable two-way anchoring screen hanger and a retrievable two-way anchoring screen system including the hanger. Background technique [0002] Due to the late start of large-scale development of geothermal resources and the compression of geothermal well development costs, there are no mature cementing and completion tools matching geothermal wells in China. It is common to use cementing and completion tools for oil and gas wells in geothermal wells, but there are Problems such as complex structure and high cost. [0003] Compared with oil and gas wells, geothermal wells have the characteristics of shallow wellbore and low formation pressure. It is easier to judge the various actions of tools, and requires lower tool bearing capacity. At present, the ball-seat screen hanger commonly used in the field of cementing and completion of oil and ga...

AI Technical Summary

Problems solved by technology

At present, the ball seat screen hanger used in the cementing and completion field of oil and gas wells is widely used in geothermal wells. The safety factor is too high and the structure is complicated, resulting in waste of cost, which does not match the low-cost development of geothermal wells.

In addition, the prior art proposes a liftable ball seat hanger, which adds a liftable ball seat unit on the basis of the conventional hanger, the overall structure is complex, the overall length of the tool is large, and the cost is high

Moreover, the ordinary hanger does not have the functions of two-way anchoring and unhanging, and cannot realize the recycling and reuse of the tail screen, resulting in waste of cost

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