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Small-sized packer capable of resisting high temperature and pressure

A small-sized, high-temperature-resistant technology, which is applied in sealing/isolation, wellbore/well parts, earthwork drilling and production, etc. Weakening and failure of the sealing effect, enriching the potential of the international market, and maintaining the effect of protection

Pending Publication Date: 2019-02-19
成都托克密封件有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a high temperature and high pressure resistant small-size packer, through the comprehensive improvement of the rubber material and the structure of the rubber parts, it solves the problems of the existing 5 1 / 2 "Insufficient high temperature and high pressure resistance of the packer and limited selection of seal materials due to assembly problems

Method used

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  • Small-sized packer capable of resisting high temperature and pressure
  • Small-sized packer capable of resisting high temperature and pressure
  • Small-sized packer capable of resisting high temperature and pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] refer to Figure 1~6 , a small-sized packer resistant to high temperature and high pressure, including a volume tube 3 and an outer center tube 6 sleeved on one end of the volume tube 3; several parallel tubes are arranged between the volume tube 3 and the outer center tube 6 The first sealing assembly 10 provided; the first sealing assembly 10 includes at least two sealing rings 12 and one more retaining ring 11 than the sealing ring 12; the retaining ring 11 is formed with an oblique cut 19, so that the retaining ring 11 The ring 11 is cut off from the oblique cut 19; the acute angle formed between the plane where the oblique cut 19 is located and the bottom surface of the retaining ring 11 is 10-20°; both sides of the sealing ring 12 are engaged with the retaining ring 11.

[0039] In this embodiment, the structural composition, assembly relationship and setting principle of the small-sized packer are roughly the same as those of the existing packer. Since the impro...

Embodiment 2

[0057] Based on Example 1, with reference to Figure 7 and 10 , in order to avoid the more obvious risk of the rubber cartridge assembly being vulnerable to pressure due to the reduction in the thickness of the rubber cartridge assembly due to the smaller size of the packer, the following improvements have been made: the outer center pipe 6 is sleeved with The rubber cartridge assembly 4; the two ends of the rubber cartridge assembly 4 are provided with a protective bowl 13; the protective bowl 13 is a bowl-shaped structure with a through hole 17 in the middle formed by bending and pressing a steel wire irregularly; the protective The surface of the bowl 13 is provided with a rubber layer 18 .

[0058] Wherein, the rubber cartridge assembly 4 is usually made of high-temperature and high-pressure-resistant rubber, and contacts the inner wall of the casing 14 through its expansion and deformation during use, thereby completing the setting action of the packer. In the prior art...

Embodiment 3

[0067] Based on Example 2, refer to Figure 10 , in order to further improve the protective effect of the protective bowl on the rubber cartridge assembly, the following improvements are made: the protective bowl 13 includes a circular platform 16 and a conical platform 15 at the bottom of the circular platform 16, and the conical platform 15 The diameter of the upper surface is greater than the diameter of the lower surface of the conical frustum 15, the upper surface of the conical frustum 15 coincides with the bottom surface of the circular frustum 16, and the protective bowl 13 is provided with a The through hole 17 of the conical truncated 15, the conical truncated 16, the conical truncated 15 and the through hole 17 are concentric, and the circular truncated 16 and the conical truncated 15 are integrally structured. It is worth noting that, in this embodiment, for the convenience of description, the structures of the various parts of the protective bowl 13 are distinguis...

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Abstract

The invention relates to a small-sized packer capable of resisting the high temperature and pressure. The small-sized packer comprises a volume pipe and an outer central pipe which sleeves one end ofthe volume pipe;a plurality of first sealing assemblies which are mutually arranged in parallel are arranged between the volume pipe and the outer central pipe; each first sealing assembly comprises at least two sealing rings and blocking rings with the number being one more than the sealing rings; and the two sides of the sealing rings are clamped with the blocking rings correspondingly. The blocking rings made of materials with better high temperature resistance and rheological resistance effects are arranged on the two sides of the sealing rings, the sealing rings and the blocking rings canbe mutually matched with each other, good protection action can be provided for the sealing rings, the facts that the rheological phenomenon of the sealing rings due to softening under the tested high temperature and high pressure conditions, and the rheological sealing rings flow out from gaps between assemblies are avoided, thus sealing performance of thesealing rings is better, occurrence of the conditions of weakening and failure of the setting effect is avoided, and thus high temperature and high pressure resistance performance of the packer is ensured; and meanwhile a bevel cutting structure of the blocking rings is utilized, and thus the problem of difficult assembly caused by selection of blocking rings is solved.

Description

technical field [0001] The invention relates to the technical field of bridge protection, in particular to a high temperature and high pressure resistant small size packer. Background technique [0002] Packer is one of the important downhole tools in the drilling and production process of oil field and gas field. As oilfields and gas fields gradually enter the late stage of development, many unfavorable conditions for development have emerged one by one; first, the contradiction between oil and gas layers has become more and more prominent; second, affected by various factors such as injected water quality, well cleaning, and operation, The degree of pollution of oil layer and gas layer is intensified; thirdly, downhole casing shrinkage, setback and rupture are getting worse day by day. For thin oil mature oilfields, in order to stabilize oil and control water, it is often necessary to take various measures such as fracturing and acidizing, which directly cause corrosion, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/127
CPCE21B33/127E21B33/1277
Inventor 郭明杨杨金辉刘建萍陈华龙李晖任俊松
Owner 成都托克密封件有限责任公司
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