Drilling fluid system for deep well drilling and preparation method thereof

A drilling and liquid technology, which is applied in the field of oil and gas exploration and development, can solve problems such as difficult to degrade, excessive heavy metal ions, and biological toxicity, and achieve the effects of reducing intrusion, preventing excessive heavy metals, and reducing biological toxicity

Active Publication Date: 2022-07-05
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The embodiments of the present disclosure provide a drilling fluid system for deep well drilling and a preparation method thereof, which can overcome the problems that the drilling fluid system used in deep well drilling is difficult to degrade, has biological toxicity, and excessive heavy metal ions

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  • Drilling fluid system for deep well drilling and preparation method thereof
  • Drilling fluid system for deep well drilling and preparation method thereof
  • Drilling fluid system for deep well drilling and preparation method thereof

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Embodiment Construction

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0038] The embodiment of the present disclosure provides a drilling fluid system for deep well drilling, the drilling fluid system includes the following components: 90-100 parts of water, 2-5 parts of bentonite, 3-6 parts of a pH adjuster, 6-10 parts of parts of acrylate copolymer, 1-6 parts of polyurethane polymer, 1-5 parts of allyl alcohol acrylic copolymer, 0.2-0.5 parts of surfactant, 4-20 parts of potassium chloride, 4-20 parts of of sodium chloride, 0.1-3 parts of potassium polyacrylamide and 0.1-3 parts of zwitterionic polymer strong coating agent.

[0039] When deep well drilling is carried out with the drilling fluid system provided in this embodiment, since the acrylate copolymer is introduced into the drilling fluid system as a...

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Abstract

The embodiments of the present disclosure provide a drilling fluid system for deep well drilling, which belongs to the technical field of oil and gas exploration and development. The embodiments of the present disclosure provide a drilling fluid system for deep well drilling. The drilling fluid system includes the following components: 90-100 parts of water, 2-5 parts of bentonite, 3-6 parts of pH adjuster, 6-10 parts of acrylate copolymer, 1-6 parts of polyurethane polymerization compound, 1-5 parts of allyl alcohol-acrylic acid copolymer, 0.2-0.5 parts of surfactant, 4-20 parts of potassium chloride, 4-20 parts of sodium chloride, 0.1-3 parts of potassium polyacrylamide Salt and 0.1-3 parts of a strong zwitterionic polymer coating agent. The present disclosure can effectively prevent the hydration expansion and dispersion of mud shale during drilling, and prevent the collapse of the well wall, and has high environmental protection type, no biological toxicity, easy degradability, and no heavy metals.

Description

technical field [0001] The present disclosure belongs to the technical field of oil and gas exploration and development, and particularly relates to a drilling fluid system for deep well drilling and a preparation method thereof. Background technique [0002] Drilling fluid refers to the general term of various circulating fluids that meet the needs of drilling work in the process of oil and gas drilling. It is essential in the drilling process and is likened to the blood of drilling. The drilling fluid needs to carry and suspend drilling cuttings, stabilize the well wall, control the formation pressure, cool and lubricate the drill bit, transmit the hydrodynamic force, obtain underground information, etc. Therefore, it is necessary to add drilling fluid treatment agents with various functions to it. . Drilling fluid treatment agents can be divided into anti-slump agents, fluid loss reducers, lost circulation agents, shale inhibitors, viscosity reducers, lubricants, high te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/12Y02P20/141
Inventor 黎然王锐邓天东杨欢向斌杨攀陈龙张佳寅
Owner PETROCHINA CO LTD
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