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Mudcake Adhesion Lubricants for Water-Based Drilling Fluids

A water-based drilling fluid and lubricant technology, applied in the field of mud cake adhesion lubricants, can solve the problems of mud cake adhesion and poor lubrication ability

Active Publication Date: 2017-09-15
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mud cake adhesion lubricant for water-based drilling fluid, which solves the problem of poor mud cake adhesion and lubrication ability of current drilling fluid lubricants

Method used

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  • Mudcake Adhesion Lubricants for Water-Based Drilling Fluids
  • Mudcake Adhesion Lubricants for Water-Based Drilling Fluids
  • Mudcake Adhesion Lubricants for Water-Based Drilling Fluids

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Mix the materials according to the following formula (calculated by mass percentage), and heat and stir at 120° C. for 15 minutes until the solids are completely dissolved to obtain mud cake adhesive lubricant for water-based drilling fluid.

[0048] White oil 96.2%

[0049] Aluminum stearate 3.1%

[0050] Sodium lauryl sulfate 0.7%

Embodiment 2

[0052] Mix the materials according to the following formula (calculated by mass percentage), and heat and stir at 120° C. for 15 minutes until the solids are completely dissolved to obtain mud cake adhesive lubricant for water-based drilling fluid.

[0053]

Embodiment 3

[0055] Mix the materials according to the following formula (calculated by mass percentage), and heat and stir at 120° C. for 15 minutes until the solids are completely dissolved to obtain mud cake adhesive lubricant for water-based drilling fluid.

[0056]

[0057] In this embodiment, if triethanolamine is not added, the lubricant will be jelly-like.

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Abstract

The invention discloses a mud cake adhesion lubricant for water-base drilling fluid, and the mud cake adhesion lubricant comprises 0.1-15wt% of mud cake adhesion lubrication improver, 0-4wt% of triethanolamine, 0.01-20wt% of surfactant and the balance of oil, wherein the chemical formula of the mud cake adhesion lubrication improver is (RCO2)[x]M or (RCO2)[x-y](OH)[y]M, wherein the R in the formula is a saturated straight chain or branched chain alkyl group of C8-C20, or an unsaturated straight chain or branched chain alkyl group of C8-C20; M is <+2>, <+3> or <+4> valent metal ions; x is equal to 2-4, y is equal to 0-2, and x is greater than y; the HLB of the surfactant is greater than 8; the oil is mineral oil, plant oil, waste engine oil, plant oil-modified oil or recovered gutter oil. The mud cake adhesion lubricant for water-base drilling fluid has excellent mud cake adhesion lubrication capability, and the reduction rate of the mud cake adhesion lubrication coefficient can achieve more than 70%.

Description

Technical field [0001] The invention relates to the field of oil and natural gas drilling operations, in particular to a mud cake adhesive lubricant for water-based drilling fluids. Background technique [0002] In drilling operations, the energy lost due to friction accounts for 70% of the total energy produced by various mobile equipment. Such a large energy loss is enough to restrict the success or failure of directional wells, horizontal wells and extended reach wells. Therefore, reducing friction loss is important Drilling engineering is of great significance. At present, the most common way to reduce friction loss is to add lubricant to the drilling fluid. [0003] Lubricants can be divided into four categories according to the lubrication mechanism and lubrication parts in the drilling process: The first category is extreme pressure lubricants that reduce the friction between the drilling tool and the casing. It usually contains S, P, N, B, O, Cl and other elements, under ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/22C09K2208/28C09K2208/34
Inventor 解洪祥王绪美赵福祥张恩平尹静刘彦妹周振良左凤江田野贾东民贾利军李洪俊虞海法
Owner BC P INC CHINA NAT PETROLEUM CORP
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