External packer of high temperature pipe

Abstract

The invention relates to an external packer of a high temperature pipe, comprising a coupling, a casing nipple, a central pipe and an upper joint; one end of the casing nipple and one end of the central pipe are fixedly connected or spin-connected by threads; the other end of the casing nipple and the coupling are fixedly connected or spin-connected by threads; the casing nipple, the upper joint sleeve and the central pipe are connected by threads; the external packer also comprises a high-temperature rubber barrel component and a bidirectional locking device; the high-temperature rubber barrel component and the bidirectional locking device are sleeved on the external surface of the central pipe; one end of the high-temperature rubber barrel component is contacted with the upper joint andthe other end thereof is contacted with the bidirectional locking device. The external packer can divide longer horizontal well section of a thick oil horizontal well into a plurality of small sections mutually independent for independent operation, solves the problem that the employed well sections are not even; and simultaneously the inner through diameters of the external packer of the high temperature pipe and a screening pipe are consistent, thus being capable of leading a steam injection pipe column and other pipe columns to be down smoothly.

Description

technical field [0001] The invention relates to a high-temperature outer pipe packer used in oil production and well completion sites in oil fields. Background technique [0002] The use of horizontal wells to increase oil well productivity and recovery has become an economical and effective means and approach to tap potential in oil fields. With the development of oilfields, the number of horizontal wells is increasing year by year, and the number of horizontal wells requiring steam injection is also increasing rapidly. At present, the completion technologies for heavy oil horizontal wells in oilfields mostly adopt open hole completion, gravel packing completion, slotted screen completion and cementing perforation completion. On the other hand, due to the anisotropy in the horizontal well section due to the uneven deposition of the formation, during the steam injection process, the steam will form a burst phenomenon in the local well section, causing problems such as uneve...

AI Technical Summary

Problems solved by technology

At present, the completion technologies for heavy oil horizontal wells in oilfields mostly adopt open hole completion, gravel packing completion, slotted screen completion and cementing perforation completion. On the other hand, due to the uneven deposition of the formation, there is anisotropy in the horizontal well section, so during the steam injection process, the steam will form a burst phenomenon in the local well section, causing problems such as uneven steam absorption in the horizontal well section.

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