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Gel valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method of gel valve

A technology of jelly valve and high sulfur content, which is applied in the field of jelly valve to achieve the effect of high cross-linking density, stable technology and excellent mineralization resistance

Active Publication Date: 2021-03-09
PETROLEUM ENG INST OF ZYOF BRANCH SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there is no jelly valve on the market that is suitable for high-sulfur gas well tubing threads

Method used

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  • Gel valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method of gel valve
  • Gel valve suitable for high-sulfur-content gas well oil pipe screw thread and preparation method of gel valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A jelly valve suitable for high-sulfur gas well oil pipe threads, the jelly valve includes the following raw material components in volume percentage: 50% of base fluid, 30% of cross-linking fluid, and 20% of accelerating fluid.

[0032] The base liquid includes the following raw material components in weight percentage: 10% polyol, 10% preservative, 5% dispersant, 75% water;

[0033] Wherein, the polyhydroxy polymer is potato starch, the preservative is sodium benzoate, and the dispersant is nano silicon dioxide.

[0034] The cross-linking solution includes the following raw material components in weight percentage: 20% of epoxy resin prepolymer, 5% of emulsifier, and 75% of water;

[0035] Wherein, the epoxy resin prepolymer is bisphenol A epoxy resin, and the emulsifier is fatty acid monoglyceride.

[0036] The accelerator liquid includes the following raw material components in weight percentage: 5% of epoxy accelerator and 95% of water; wherein, the epoxy accelera...

Embodiment 2

[0049] A jelly valve suitable for high-sulfur gas well oil pipe threads, the jelly valve includes the following raw material components in volume percentage: 40% of base liquid, 35% of cross-linking liquid, and 20% of accelerating liquid.

[0050] The base liquid includes the following raw material components in weight percentage: 10% polyol, 10% preservative, 5% dispersant, 75% water;

[0051] Wherein, the polyhydroxy polymer is guar gum, the preservative is potassium sorbate, and the dispersant is kaolin.

[0052] The cross-linking solution includes the following raw material components in weight percentage: 20% of epoxy resin prepolymer, 10% of emulsifier, and 70% of water;

[0053] Wherein, the epoxy resin prepolymer is bisphenol F epoxy resin, and the emulsifier is sodium lauryl sulfate.

[0054] The accelerator solution includes the following raw material components in weight percentage: 8% of epoxy accelerator and 92% of water; wherein, the epoxy accelerator is ethylen...

Embodiment 3

[0067] A jelly valve suitable for high-sulfur gas well tubing threads, the jelly valve includes the following raw material components by volume percentage: the jelly valve includes the following raw material components by volume percentage: base liquid 50% , 31.25% of cross-linking liquid, 18.75% of accelerating liquid.

[0068] The base liquid includes the following raw material components in weight percentage: polyol polymer 15%, preservative 10%, dispersant 5%, water 70%;

[0069] Wherein, the polyhydroxy polymer is glutinous rice flour, the preservative is calcium propionate, and the dispersant is talcum powder.

[0070] The cross-linking solution includes the following raw material components in weight percentage: 25% of epoxy resin prepolymer, 10% of emulsifier, and 65% of water;

[0071] Wherein, the epoxy resin prepolymer is glycidyl ether epoxy resin, and the emulsifier is sodium lauryl sulfate.

[0072] The accelerator solution includes the following raw material c...

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Abstract

The invention discloses a gel valve suitable for a high-sulfur-content gas well oil pipe screw thread and a preparation method of the gel valve, and relates to the technical field of gel valves, the gel valve comprises the following raw material components in percentage by volume: 35-50% of base fluid, 15-35% of cross-linking fluid and 15-25% of promoting fluid; wherein the base fluid comprises the following raw material components in percentage by weight: 0.1-30% of a polyhydroxy polymer, 0.1-10% of a preservative, 0.1-10% of a dispersing agent and the balance of water; wherein the cross-linking liquid comprises the following raw material components in percentage by weight: 0.1-30% of an epoxy resin prepolymer, 0.1-10% of an emulsifier and the balance of water; and the promoting liquid comprises the following raw material components in percentage by weight: 0.1-10% of an epoxy accelerator and the balance of water. The gel valve is adjustable in curing time, the pressure bearing capacity is larger than or equal to 200 KPa / m, the pressure bearing validity period is larger than or equal to 50 days, and the gel valve is suitable for plugging operation of the high-sulfur-content gas well.

Description

technical field [0001] The invention relates to the technical field of jelly valves, in particular to a jelly valve suitable for high-sulfur gas well tubing threads and a preparation method thereof. Background technique [0002] The buried depth of Puguang high-sulfur gas well is 5000-6000m, and the H 2 The S content is 10-15%, the temperature is 90-130°C, the formation pressure is 25-35MPa, and a permanent packer is used to complete the well. In the process of gas field development, a series of measures will be taken to transform the reservoir. In order to ensure the safety of the gas well measures, hydraulic well killing is often used to ensure the smooth operation of the measures. [0003] Most of the existing Puguang high-sulfur gas wells generally use coiled tubing. Although the low-density well killing fluid has a good killing effect in coiled tubing, it is only suitable for reservoirs with a pressure coefficient > 0.4; The production and formation pressure of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/512C09K8/514
CPCC09K8/512C09K8/514C09K8/5045C09K8/5083C09K2208/26
Inventor 李智慧张庆生张诚张永军谭肖何文斌姚建兵任保瑞
Owner PETROLEUM ENG INST OF ZYOF BRANCH SINOPEC
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