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Temporary plugging agent with tassel-shaped two ends as well as preparation method and application thereof

A temporary plugging agent, tassel technology, applied in chemical instruments and methods, mining fluids, earthwork drilling and other directions, can solve the problems of unfavorable suspension and dispersion of tassel, unfavorable temporary plugging agent salvage or flowback, mutual entanglement, etc., and achieve degradation. Controllable time, good blocking effect, and effect of reducing dosage

Active Publication Date: 2020-08-25
FIVE STAR DOWNHOLE SERVICE INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] For a temporary plugging agent with tassel structure at both ends, if the tassels at both ends are longer, it is easy to entangle with each other during storage, transportation, and downhole; if the tassel is too short, it is not conducive to suspension dispersion and temporary plugging salvage or flowback of the temporary plugging agent (some degradable temporary plugging agents do not need to consider the problem of salvage or flowback); in addition, if there are some water-swelling components in the temporary plugging agent, these components may also be caused by Failure occurs due to premature water expansion

Method used

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  • Temporary plugging agent with tassel-shaped two ends as well as preparation method and application thereof
  • Temporary plugging agent with tassel-shaped two ends as well as preparation method and application thereof
  • Temporary plugging agent with tassel-shaped two ends as well as preparation method and application thereof

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preparation example Construction

[0044] One aspect of the embodiments of the present invention provides a method for preparing a tassel-shaped temporary plugging agent at both ends, which includes:

[0045] The water-swellable deformed fiber and the high-strength rigid fiber are paralleled and compounded to form a temporary plugging fiber bundle;

[0046] Knotting the temporary plugging fiber bundle to form a temporary plugging fiber bundle with a tassel knot main body in the middle and tassel-like ends at both ends; and,

[0047] The temporary plugging fiber bundle with tassel-like ends is impregnated with polyester resin to obtain a tassel-like temporary plugging agent.

[0048] In some preferred embodiments, the preparation method includes: compounding the water-swellable deformed fiber and the high-strength rigid fiber by twisted or non-twisted paralleled fibers to form the temporary plugging fiber bundle.

[0049] In some more specific embodiments, the preparation method of the tassel-like temporary blo...

Embodiment 1

[0089] A preparation method of a tassel-shaped temporary plugging agent applied to both ends of temporary plugging fracturing is as follows:

[0090] (1) Preparation of water-swellable deformed fiber: Slice the water-swellable fiber (the mass of adipate monomer unit accounts for 0% of the mass of polyterephthalic acid-adipic acid-ethylene glycol-polyethylene glycol copolyester, Polyethylene glycol monomer units account for 30% of the quality of polyethylene terephthalic acid-adipic acid-ethylene glycol-polyethylene glycol copolyester, wherein the number-average molecular weight of polyethylene glycol monomer units is 1000, a total of Polyester intrinsic viscosity 0.6dL / g) and spandex chip (polyether type, tensile strength 32MPa, elongation at break 800%) make water-swelling fiber chip component and spandex chip component cross-sectional area by compound spinning machine and be 1 :2 The side-by-side composite fiber is the water-swellable deformed fiber.

[0091] (2) be 2dtex, ...

Embodiment 2

[0094] A preparation method of a tassel-shaped temporary plugging agent applied to both ends of temporary plugging fracturing is as follows:

[0095] (1) Preparation of water-swellable deformed fiber: Slice the water-swellable fiber (the mass of adipate monomer unit accounts for 10% of the mass of polyterephthalic acid-adipic acid-ethylene glycol-polyethylene glycol copolyester, Polyethylene glycol monomer units account for 30% of the quality of polyethylene terephthalic acid-adipic acid-ethylene glycol-polyethylene glycol copolyester, wherein the number-average molecular weight of polyethylene glycol monomer units is 3000, a total of Polyester intrinsic viscosity 0.8dL / g) and spandex chip (polyester type, tensile strength 30MPa, elongation at break 300%) make water-swellable fiber chip component and spandex chip component cross-sectional area by compound spinning machine and be 2 :1 The side-by-side composite fiber is the water-swellable deformed fiber.

[0096] (2) The wate...

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Abstract

The invention discloses a temporary plugging agent with tassel-shaped two ends as well as a preparation method and application thereof. The preparation method comprises the following steps: doubling and compounding water-swelling deformed fibers and high-strength rigid fibers to form a temporary plugging fiber bundle; knotting the temporary plugging fiber bundle to form a temporary plugging fiberbundle of which the middle is provided with a tassel knot main body and the two ends are in a tassel shape; and carrying out dipping treatment on the temporary plugging fiber bundle with the tassel-shaped two ends by using polyester resin to obtain the temporary plugging agent with the tassel-shaped two ends. The pressure bearing strength of the temporary plugging agent with the tassel-shaped twoends is as high as 70 MPa, the temporary plugging agent can plug shot holes and even deformed shot holes, can reduce the using amount of bridge plugs and the temporary plugging agent, or even replacethe bridge plugs to form more effective plugging, and the cost is reduced; the degradation performance is flexible and controllable, the time for drilling a bridge plug can be saved by selecting a degradable material, the construction cost is reduced, the construction safety is ensured, and the purpose of temporary plugging steering can be achieved by adding a small amount of tassel-shaped temporary plugging agent into a fracturing fluid.

Description

technical field [0001] The invention belongs to the technical field of increasing production of oil and natural gas wells, and in particular relates to a tassel-shaped temporary plugging agent at both ends and a preparation method thereof, as well as its application in temporary plugging diversion fracturing. Background technique [0002] In the development process of low-permeability oil and gas reservoirs, fracturing is one of the main production stimulation measures. Its purpose is to open a fracture in the low-permeability reservoir, increase the drainage area, and increase oil and gas production. The temporary plugging diversion fracturing technology is to add a temporary plugging agent in real time during the fracturing process. Based on the principle that the fluid flows in the direction of the least resistance, the temporary plugging agent will enter the blasthole connected to the original fracture or high permeability layer along with the fracturing fluid. The accum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/516C09K8/508C09K8/68C09K8/70C09K8/88C09K8/92D06M15/507D01F8/14D01F8/16E21B33/13E21B43/26D06M101/30D06M101/38D06M101/32D06M101/34D06M101/28
CPCC09K8/516C09K8/5086C09K8/68C09K8/70C09K8/885C09K8/92D06M15/507D01F8/14D01F8/16E21B33/13E21B43/26C09K2208/08D06M2101/30D06M2101/38D06M2101/32D06M2101/34D06M2101/28
Inventor 陈明慧赵亮郑松鹤孙力胡毅胡成
Owner FIVE STAR DOWNHOLE SERVICE INC
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