Iris aperture type packer for annular pipeline

Abstract

The invention provides an iris aperture type packer for an annular pipeline. The iris aperture type packer comprises a hook 1, a rotating handle 5 and a main body part, wherein the main body part comprises a base ring 2, a rotating flap 3, a rotating ring 4 and a top cover ring 6; the lower end of the hook 1 is fixedly connected with the top cover ring 6; the upper end of the hook 1 is fixedly connected with a protection pipe 8; guide chutes 23 in uniform distribution are formed in the upper surface of the base ring 2; the rotating flap 3 is arranged between the rotating ring 4 and the base ring 2; one part of the lower end of the rotating flap 3 is movably arranged in the guide chutes 23 of the base ring 2; one part of the upper end of the rotating flap 3 is fixedly connected with the rotating ring 4; and the lower end of the rotating handle 5 is fixedly connected with the rotating ring 4. The iris aperture type packer has the advantages that the reliability is high; the structure and the manufacturing process are simple; the manufacturing cost is low; the iris aperture type packer can be applied to a smaller annular region; the diameter change operation is simple and convenient; the iris aperture type packer can be applicable to vertical pipes with different outer diameter dimensions; the packer can be uniformly stressed in the use process; and the relative position deflection of the packer in the annular pipeline cannot be caused.

Description

technical field [0001] The invention relates to the technical field of oil exploration and drilling, in particular to an iris diaphragm packer used for annulus pipelines. Background technique [0002] In the field of oil drilling and drilling technology, especially in the field of offshore oil drilling, steel pipes are widely used to inject water or extract oil and gas resources from the water drilling platform to oil fields located underground or on the seabed. Among them, the pipes used to inject water into oil fields are called It is a water injection riser; the pipeline used to transport oil and gas is called an oil and gas riser, and the two are collectively called a riser. In order to protect the standpipe, a steel protective pipe is generally put on the outer periphery of the standpipe; there is an annular area between the standpipe and the protective pipe, so the riser and the protective pipe are collectively called the annular pipeline. [0003] Although the protec...

AI Technical Summary

Problems solved by technology

[0008] Different from the special packer for downhole layer isolation, the hydraulic packer has a high load, but still has limitations such as complex structure and process, high cost, risk of hydraulic leakage, and difficulty in applying to small annulus areas

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