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High-density solid-free stagnation plug and preparation method thereof

A solid-free, high-density technology, applied in the field of petroleum drilling, can solve problems such as the increase in viscosity of polysulfide drilling fluid, and achieve the effects of slowing down the upward channeling of oil and gas, ensuring construction efficiency and safety, and strong temperature resistance

Pending Publication Date: 2021-10-15
成都西油华巍科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the use of high-concentration bentonite slurry, it is easy to cause the viscosity of polysulfonate drilling fluid to increase

Method used

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  • High-density solid-free stagnation plug and preparation method thereof
  • High-density solid-free stagnation plug and preparation method thereof
  • High-density solid-free stagnation plug and preparation method thereof

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Embodiment Construction

[0031] In the following, only some exemplary embodiments are briefly described. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

[0032] A high density non-solid gas stagnation plug, by weight and 100%, comprising the following raw materials:

[0033] Water 30%~50%,

[0034] Propylene-based polymer 2% to 5%,

[0035] Anti-temperature stabilizer 2% to 5%;

[0036] Corrosion inhibitor 0.2% ~ 0.5%,

[0037] Alkalinity regulator 0.1% ~ 3%,

[0038] No solid phase weighting agent 40-65%.

[0039] Wherein, the acrylic polymer is one or more of polyacrylic acid, polyacrylic acid salt, polyacrylamide, and acrylic acid-acrylamide copolymer. The anti-temperature stabilizer is one or more of sodium thiosulfate and thiosulfuric acid. The corrosion inhibitor is one or two kinds of polycarboxylic acid and sodium gluconate. The alkalinity regulator ...

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Abstract

The invention discloses a high-density solid-free stagnation plug and a preparation method thereof. The stagnation plug is prepared from the following raw materials in percentage by weight: 30-50% of water, 2-5% of a propenyl polymer, 2-5% of a temperature-resistant stabilizer, 0.2%-0.5% of corrosion inhibitor, 0.1%-3% of alkalinity regulator and 40%-65% of solid-free weighting agent. According to the high-density solid-phase-free stagnation plug and the preparation method, the upward flowing speed of oil gas in a shaft in the tripping-out and tripping-in process can be slowed down, the exhaust time is shortened, and the construction safety is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a high-density solid-phase-free gas stagnation plug and a preparation method thereof. Background technique [0002] With the continuous development of oil and gas development technology, deep oil and gas resources have become a new development hotspot. However, in the process of drilling and completion, gas intrusion often occurs when drilling into natural gas reservoirs, especially the gas intrusion caused by gas-liquid displacement is difficult to deal with. In order to reduce the risks of gas channeling, kick, overflow, blowout, etc. during drilling and completion, gas plugging technology is required in underbalanced drilling and completion operations. At present, there are two main methods commonly used in domestic air-blocking technology: gel valve and high-concentration bentonite slurry technology. [0003] The jelly valve pumps the chemical cross-linking agent...

Claims

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Application Information

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IPC IPC(8): C09K8/40
CPCC09K8/40
Inventor 宋芳徐兴华麻洪霞肖刚
Owner 成都西油华巍科技有限公司
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