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Mud cake adhesion lubricant for water-base drilling fluid

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

Active Publication Date: 2014-06-18
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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  • Mud cake adhesion lubricant for water-base drilling fluid
  • Mud cake adhesion lubricant for water-base drilling fluid
  • Mud cake adhesion lubricant for water-base drilling fluid

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Mix the materials according to the following formula (calculated by mass percentage), heat and stir at 120°C for 15 minutes until the solids are completely dissolved, and then the mud cake adhesion lubricant for water-based drilling fluid is obtained.

[0045] White oil 96.2%

[0046] Aluminum stearate 3.1%

[0047] Sodium Lauryl Sulfate 0.7%

Embodiment 2

[0049] Mix the materials according to the following formula (calculated by mass percentage), heat and stir at 120°C for 15 minutes until the solids are completely dissolved, and then the mud cake adhesion lubricant for water-based drilling fluid is obtained.

[0050]

Embodiment 3

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

[0053]

[0054] If do not add triethanolamine among this embodiment, lubricant will be jelly.

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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 adhesion lubricant for water-based drilling fluid. Background technique [0002] In drilling operations, the energy lost due to friction accounts for 70% of the total energy generated by various mobile equipment. Such a large energy loss is enough to restrict the engineering success of directional wells, horizontal wells and extended-reach wells. Therefore, reducing friction loss is of great importance Drilling engineering is of great significance. At present, the most common way to reduce friction loss is to add lubricant to drilling fluid. [0003] Lubricants can be divided into four categories according to the lubrication mechanism and lubricating parts in the drilling process: the first category is the extreme pressure lubricant that reduces the friction between the drilling tool and the casing, which usually contains S, P, N, B, O, Cl and o...

Claims

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Application Information

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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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