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Rotary self-sealing well sealer

A technology of sealing device and self-sealing glue, which is applied in the directions of sealing/isolation, wellbore/well components, earthwork drilling and production, etc., and can solve the problems that self-sealing sealing devices cannot meet the rotary sealing function

Inactive Publication Date: 2011-05-18
雷宽成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual operation, the drill pipe and tubing are in a rotating state in many working conditions, and the conventional self-sealing sealer cannot meet the rotating sealing function

Method used

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  • Rotary self-sealing well sealer
  • Rotary self-sealing well sealer
  • Rotary self-sealing well sealer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 2 As shown in the structural diagram of the embodiment of the present invention, the rotary self-sealing sealer is composed of a housing 1, an upper bearing 2, a righting bearing 3, a lower bearing 4, a rotary self-sealing rubber sleeve 5, a pressure plate 6, a sealing ring 7 and fixing bolts 8 composition.

[0028] The upper part of the rotary self-sealing rubber sleeve 5 is a hollow circular cake ring structure. The upper surface of the upper part of the rotary self-sealing rubber sleeve 5 cooperates with the upper bearing 2, and the outer circle of the upper part of the rotary self-sealing rubber sleeve 5 cooperates with the righting bearing 3. The upper lower surface of the rubber sleeve 5 cooperates with the lower bearing 4, and the upper bearing 2, the rotating self-sealing rubber sleeve 5, the righting bearing 3, and the lower bearing 4 are fixed in the housing 1 by the pressure plate 6 at the bottom of the lower bearing 4.

[0029] The sealing r...

Embodiment 2

[0032] The housing 1 in Example 1 is shown in Figure 3, the housing 1 is a hollow cylindrical structure, the inner hole of the lower part of the housing 1 is larger than the inner hole of the upper part, and the inner diameter of the upper part is 4-4- 6mm, the housing 1 plays the role of guiding the drill pipe and the oil pipe. There is an oil filling hole 9 on the outer circle of the upper part of the housing 1. Grease is injected into each bearing in the housing 1 through the oil filling hole 9 .

[0033] There are threaded holes 10 on the lower surface of the housing 1 , and the pressure plate 6 is fixedly connected to the threaded holes 10 on the lower surface of the housing 1 through fixing bolts 8 .

[0034] The casing 1 also has several bolt holes 11, which run through the casing 1, and the rotary self-sealing sealing device can be fixed on the wellhead flange, wellhead cross or blowout preventer and other supporting facilities through the bolt holes 11.

Embodiment 3

[0036] The upper bearing 2 in Embodiment 1 is shown in Figure 4. The upper bearing 2 is composed of a lower pressure ring 12, an upper pressure ring 13 and an upper bearing ball body 14. Both the lower pressure ring 12 and the upper pressure ring 13 are ring-shaped pressure rings. Ring, the upper bearing ball body 14 is placed between the lower pressure ring 12 and the upper pressure ring 13.

[0037] There is an annular boss on the lower end surface of the lower pressure ring 12, and the boss cooperates with the groove of the corresponding part of the rotary self-sealing rubber sleeve 5 to trap and compress the rubber sleeve, and at the same time, play a sealing role.

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Abstract

The invention relates to a well sealer for sealing the mouths of wells in an oil field, in particular to a rotary self-sealing well sealer which comprises a shell, an upper bearing, a centralizing bearing, a lower bearing, a rotary self-bearing rubber sleeve and a pressure plate. The rotary self-sealing well sealer is characterized in that the upper part of the rotary self-bearing rubber sleeve is in a hollow cake ring-shaped structure, the upper surface of the upper part of the rotary self-bearing rubber sleeve is matched with the upper bearing, the outer circle of the upper part of the rotary self-bearing rubber sleeve is matched with the centralizing bearing, the lower surface of the upper part of the rotary self-bearing rubber sleeve is matched with the lower bearing, and the upper bearing, the rotary self-bearing rubber sleeve, the centralizing bearing and the lower bearing are fixed in the shell by the pressure plate at the bottom of the lower bearing. The invention provides a special rotary self-sealing well sealer for sealing drill rods, oil pipes and well-in annulus rotating in the mouths of the wells during drilling and repairing oil wells, water wells and oil and gas wells.

Description

technical field [0001] The invention relates to a sealing device for oilfield wellhead sealing, in particular to a rotary self-sealing sealing device. Background technique [0002] During drilling and workover operations in oil fields, the traditional self-sealing well sealing device is fixed at the wellhead, see figure 1 , can only be used for the sealing work of tripping drill pipes and oil pipes. If the drill pipes and oil pipes rotate, the self-sealing rubber sleeve will be damaged. However, in the actual operation, the drill pipe and oil pipe are in a rotating state in many working conditions, and the conventional self-sealing sealer cannot meet the rotating sealing function. In order to prevent the rotating drill pipe, tubing, and oil-water gas from the annular space in the well from upwelling or ejecting from the wellhead, and at the same time prevent the falling objects from the wellhead from falling into the well, and scrape off the oil on the outer wall of the dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/03
Inventor 姚晓翔宋辉薛守时殷生荣刘新印徐红季彩龙张青卫胡慧婷尹登兰雷宽成
Owner 雷宽成
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