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Umbrella-key laminated sealed seat full-diameter soluble fracturing sliding sleeve

A technology for fracturing sliding sleeves and sealing seats, which is applied in the directions of sealing/isolation, production fluid, wellbore/well components, etc., to achieve the effects of simple shorting structure, simple and reliable expansion action, and reliable operation

Active Publication Date: 2018-10-23
CNPC BOHAI DRILLING ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a full-diameter soluble fracturing sliding sleeve with an umbrella key laminated sealing seat, which solves the complex operation of drilling and removing the bridge plug existing in the existing pumping bridge plug. It can dissolve the plugging device and umbrella key laminated sealing seat in the wellbore to realize full-bore, infinite pole, and large-displacement fracturing, thereby achieving the purpose of improving operating efficiency and reducing operating costs

Method used

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  • Umbrella-key laminated sealed seat full-diameter soluble fracturing sliding sleeve
  • Umbrella-key laminated sealed seat full-diameter soluble fracturing sliding sleeve
  • Umbrella-key laminated sealed seat full-diameter soluble fracturing sliding sleeve

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Embodiment Construction

[0027] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0028] Such as Figure 1-15 As shown, the umbrella key laminated sealing seat type full-diameter soluble fracturing sliding sleeve of the present invention includes a seat sealing device I, an occluder 7, an umbrella key laminated sealing seat II and a downhole preset casing short connection III , the seat seal device is composed of a housing 1 and an expanding diameter connecting rod 2, the small outer diameter section on the upper part of the expanding diameter connecting rod 1 is inserted inside the housing 1, and the circumferential direction of the large outer diameter section in the middle is in contact with the umbrella key laminated sealing seat, The lower part has a guide inclined surface 2-1 with an enlarged outer diameter; the umbrella key laminated sealing seat includes an umbrella key layer, an interlayer and a gasket layer that are...

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Abstract

The invention discloses an umbrella-key laminated sealed seat full-diameter soluble fracturing sliding sleeve comprising a seat sealing device, an umbrella-key laminated sealing seat, a plugging device and a sleeve short circuit. The seat sealing device is composed of a housing and an expending connecting rod; an upper part of the expanding connecting rod is placed inside the housing and the middle part is circumferentially in touch with the umbrella-key laminated sealing seat. the umbrella-key laminated sealing seat is composed of an umbrella-key laminated layer, an interlayer and a gasket layer and is assembled by a groove slide rail and a projecting slide block by connecting. When a gunpowder seat sealing tool is started, the extending connecting rod is lifted upward to have a relativedisplacement with the housing; the umbrella-key laminated sealing seat is guided by the groove slide chute to form the final umbrella-key laminated sealing seat. After the umbrella-key laminated sealing seat is formed, it is seat-sealed on the sleeve short circuit and then is lifted out of a well head by a cable. Finally, the plugging device and the umbrella-key laminated sealing seat are combinedto block the layer to be fractured, and the fracturing operation of the layer can be performed.

Description

technical field [0001] The invention relates to the field of well completion engineering of unconventional oil and gas reservoirs such as petroleum and natural gas, in particular to an umbrella key laminated sealing seat type full-diameter soluble fracturing sliding sleeve. Background technique [0002] Unconventional oil and gas resources have entered the stage of history as an important successor of future oil and gas resources, but unconventional oil and gas reservoirs are characterized by tightness, low porosity, and low permeability. At present, the full-bore, large-displacement, and infinite-pole fracturing technology is an effective means to stimulate unconventional oil and gas reservoirs. [0003] For the exploitation of such unconventional oil and gas reservoirs, the combination of pumping bridge plug and perforation is mainly used for reservoir fracturing. Although this method can realize large-displacement, full-diameter, and infinite-pole fracturing, after the f...

Claims

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Application Information

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IPC IPC(8): E21B34/14E21B43/26
CPCE21B34/14E21B43/26
Inventor 杨晓勇王益山冯强张鹏周后俊秦诗涛张雅静
Owner CNPC BOHAI DRILLING ENG
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