A packer structure

Abstract

The invention discloses a packer structure. The packer structure comprises a central tube, a setting barrel, a rubber barrel seat and a rubber barrel, wherein the rubber barrel seat comprises an upper rubber barrel seat and a lower rubber barrel seat; the setting barrel, the upper rubber barrel seat, the rubber barrel and the lower rubber barrel seat are orderly sleeved on the central tube from top to bottom, a self-locking mechanism is arranged between the setting barrel and the upper rubber barrel seat, and two ends of the rubber barrel are respectively provided with an end ring and an expansion ring in order. The packer structure disclosed by the invention is not only small in radial gap, but also capable of effectively packing the great annular gap; meanwhile, the price is low, the well cementation quality is improved, and capacity increasing and revamp are guaranteed.

Description

technical field [0001] The invention relates to a packer structure, which is used for oil and gas well cementing and production stimulation transformation operations for oil and gas development, and belongs to the technical field of downhole tool manufacturing for oil and gas field operations. Background technique [0002] In the cementing construction of oil and gas wells, packers are often used to prevent oil, gas, water, etc. from channeling, effectively achieve permanent mechanical isolation of the annulus, and improve cementing quality. [0003] In the process of oil and gas well stimulation and stimulation, packers are often used to achieve interlayer isolation and jamming, to ensure the pertinence of well completion and stimulation, and to maximize the effect of stimulation and stimulation. [0004] At present, the traditional packer structures used in oil and gas well cementing and stimulation operations mainly include compression type and expansion type. For exampl...

AI Technical Summary

Problems solved by technology

[0005] The compression packer compresses the rubber tube by axial pressure, the rubber tube becomes thicker in the radial direction, fills the annulus gap, and realizes isolation. Small, when the rubber tube is thin and the annular gap is large, effective isolation is often not achieved

The expandable packer achieves isolation by injecting fluid into the rubber tube to radially expand the rubber tube to fill the annulus gap. The packer has a complex structure and high manufacturing costs

[0006] In summary, the compression packer in the prior art has the disadvantages of large radial design space and small annulus sealing gap, and the expansion packer has the disadvantages of complex structure and high cost

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