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While-drilling blocking agent capable of resisting high temperature of 220 DEG C for drilling fluid and preparation method of while-drilling blocking agent

A drilling fluid and plugging agent technology, applied in chemical instruments and methods, drilling compositions and other directions, can solve the problems of drilling fluid leakage, wellbore instability, etc., and achieves low cost, simple preparation method, and good high temperature resistance. The effect of the blocking effect

Active Publication Date: 2017-07-25
BEIJING INST OF EXPLORATION ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problems of drilling fluid loss and wellbore instability caused by drilling high-temperature sections of deep wells when they encounter permeable leakage formations and fractured formations, the present invention provides a drilling fluid resistant to 220°C high temperature while drilling plugging agent and its preparation method

Method used

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  • While-drilling blocking agent capable of resisting high temperature of 220 DEG C for drilling fluid and preparation method of while-drilling blocking agent
  • While-drilling blocking agent capable of resisting high temperature of 220 DEG C for drilling fluid and preparation method of while-drilling blocking agent
  • While-drilling blocking agent capable of resisting high temperature of 220 DEG C for drilling fluid and preparation method of while-drilling blocking agent

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Effect test

Embodiment 1

[0027] (1) Formula of anti-220℃ high temperature plugging agent while drilling:

[0028]

[0029]

[0030] Add calcium carbonate powder, sepiolite fiber, glass fiber, regenerated silicone rubber particles, asphalt powder, sulfonated lignite, anti-high temperature fluid loss reducer OCL-JA and sodium citrate into the mixer according to the above weight fraction, and mix for 30 minutes Then get the product.

Embodiment 2

[0032] (1) Formula of anti-220℃ high temperature plugging agent while drilling:

[0033]

[0034] Add calcium carbonate powder, sepiolite fiber, polyacrylonitrile fiber, recycled plastic particles, asphalt powder, sulfonated lignite, sulfonated phenolic resin SMP-I and high-temperature protective agent GBH into the mixer according to the above weight fraction, and mix for 30 minutes Then get the product.

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Abstract

The invention discloses a while-drilling blocking agent capable of resisting high temperature of 220 DEG C for drilling fluid and a preparation method of the while-drilling blocking agent. The while-drilling blocking agent is prepared from the following components in parts by weight: 10 to 15 parts of rigid particles, 40 to 50 parts of a fiber material, 20 to 30 parts of deformable particles, 15 to 20 parts of a shield filtrate loss reduction material and 5 to 10 parts of a high-temperature protecting agent. The while-drilling blocking agent disclosed by the invention can resist the temperature of 220 DEG C, is good in high-temperature resistance and blocking performance, cannot affect the rheological property of the drilling fluid and is widely applicable to high-temperature dry hot rock, high-temperature geothermal and deep oil and gas drilling and deep scientific drilling.

Description

technical field [0001] The invention relates to the technical field of leakage plugging and retaining walls in the process of hot dry rock drilling, high-temperature geothermal drilling, deep oil and gas resource drilling and deep scientific drilling, and in particular to a plugging agent for drilling fluid resistant to 220°C high temperature while drilling. Background technique [0002] Lost circulation is a common downhole complication in drilling engineering. Once a leakage occurs, not only the drilling time will be delayed, the drilling fluid will be lost, but also the well wall may become unstable, leading to a series of complex situations and accidents such as well collapse and pipe sticking, and even lead to the scrapping of the wellbore, resulting in major economic losses. At present, the effective way to control the permeability loss is mainly to adopt plugging technology while drilling, that is, adding a certain amount of plugging material while drilling into the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/42
CPCC09K8/426C09K2208/08C09K2208/18
Inventor 熊正强谭现锋陶士先赵长亮李晓东付帆纪卫军单文军李艳宁
Owner BEIJING INST OF EXPLORATION ENG
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