Downhole tubular column and hydraulic opening tool for opening sliding sleeve switch

A technology of sliding sleeve switch and downhole pipe string, which is applied in the direction of wellbore/well valve device, wellbore/well parts, earthwork drilling and production, etc. It can solve the problems such as difficult sliding sleeve combination, and achieve reliable operation and convenient use , The effect of reducing manufacturing costs

Pending Publication Date: 2022-02-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a downhole pipe string, which is easy to cooperate with the adapted hydraulic opening tool to open the predetermined sliding sleeve switch, so as to solve the problem that the hydraulic opening tool is not easy to combine with the pre

Method used

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  • Downhole tubular column and hydraulic opening tool for opening sliding sleeve switch
  • Downhole tubular column and hydraulic opening tool for opening sliding sleeve switch
  • Downhole tubular column and hydraulic opening tool for opening sliding sleeve switch

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0057] Specific Example 1 of the underground tube of the present invention is:

[0058] The underground pipe column includes a tubular body, a tube housing comprising a series of casing, packer, and a sleeve switch and other components, wherein the packer is used to secure the underground pillar in the well, and the slide switch is corresponding to the corresponding The mining layer corresponds to the mining of the lower tube column by controlling the opening and closing of the sleeve switch. Under normal circumstances, when the underground pipe column is in the well, the slider switch is closed, and when the corresponding layer is required, the corresponding layer can be cured in the downhill column. figure 2 The hydraulic open tool shown is controlled to turn on the corresponding slider switch.

[0059] The slide switch here is arranged in a plurality of intervals in the vertical direction, and the structure of each slider switch is basically the same, such as figure 1 As shown, ...

Example Embodiment

[0065] Specific Example 2 of the underground tube provided by the present invention:

[0066] It is primarily that the elastic locking structure arranged between the outer casing and the inner sleeve is in the present embodiment, in the present embodiment, in the present embodiment, the elastic lock structure is a bow-shaped shrapnel, an arcuate shrapnel The card is attached to the card slot provided on the outer slide outer peripheral surface, and the outer end of the arcuate limit shrapnel is disposed to be used to cooperate with different card tanks on the inner wall of the outer casing. Its structure can be found in the provision of the arcuate limit shrapnel in the Chinese invention patent of CN105672946B.

[0067] Of course, in other embodiments, the elastic locking structure can also employ an anchor-type limit shrapnel in the switch sheath disclosed in Chinese invention patents in CN105696975B, and will not be described here.

Example Embodiment

[0068] Example 1 of a hydraulic opening tool for opening a slide switch is provided in the present invention:

[0069] Such as Figure 2 to 7 Design, the hydraulic opening tool 200 in this embodiment is used to lower the slide switch 100 of the underground column to drive the inner slide 102 to move to the opening position, open the slider switch.

[0070] The hydraulic closing tool 200 includes an upper junction 201, connecting short tube 202, an inner tube 203, an outer support tube 208, a clipper 205, a positioning ring 207, a pilling lock 212, a pressure tube 214, and a guide joint 215.

[0071] Among them, the external thread connecting the short tube 202 is fastened to the internal thread of the upper joint 201 to form a joint body, and an annular endo edge is disposed inside the upper joint 201, and the tip of the connection short tube 202 is stopped. Further, a seal ring is provided between the upper connector 201 and the connection short tube 202 to seal the assembly gap o...

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Abstract

The invention relates to a downhole tubular column and a hydraulic opening tool for opening a sliding sleeve switch, the upper and lower groove width sizes of annular positioning grooves of all the sliding sleeve switches in the underground pipe column are sequentially increased from top to bottom, and the hydraulic opening tool comprises an inner pipe assembly, a lifting lock tongue, an inward-retracting elastic piece, a positioning boss and an outward-extending elastic piece; an elastic acting force for driving the positioning boss to extend outwards is applied to the positioning boss, the positioning boss has the set up-down width size, and in the process that the hydraulic opening tool is put down through the coiled tubing, when the positioning boss extends outwards to be matched with the annular positioning groove in the corresponding sliding sleeve switch in a positioning and inserting mode, it is indicated that the hydraulic opening tool is lowered in place. In the lowering process, the positioning boss of the hydraulic opening tool is squeezed all the time before the hydraulic opening tool is not lowered in place due to the size problem until the positioning boss is clamped with the annular positioning groove of the selected sliding sleeve switch and the annular positioning groove of the selected sliding sleeve switch, it is indicated that the hydraulic opening tool is lowered in place, and therefore the selected sliding sleeve switch can be accurately turned on, and the turning-on accuracy is guaranteed.

Description

technical field [0001] The invention belongs to the field of downhole operation tools in oil and gas fields, and in particular relates to a downhole pipe string and a hydraulic opening tool for opening a sliding sleeve switch. Background technique [0002] The sliding sleeve that can be opened and closed repeatedly is one of the core tools for segmental reconstruction and layered mining of horizontal wells completed in stages. The oil flow passage is arranged on the pipe wall of the outer casing, and the inner sliding sleeve can move relative to the outer casing under the drive of the sliding sleeve switch tool, so as to open or close the oil flow passage on the outer casing. During the production process of oil and gas wells, the matching sliding sleeve opening tool can be used to open the sliding sleeve for the closed production layer, which can realize the repeated opening of the sliding sleeve of the designated production layer after repeated closing, satisfying the stra...

Claims

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Application Information

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IPC IPC(8): E21B34/14E21B23/10
CPCE21B34/14E21B23/10
Inventor 赵效锋曹海燕吴坤琪吴信荣董爱粉王选奎邓小伟赵国瑜
Owner CHINA PETROLEUM & CHEM CORP
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