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Method for preparing drilling fluid lubricant for reducing extreme pressure friction and mud cake adhesive friction

A mud cake lubrication improvement and drilling fluid technology, which is applied in the fields of oil and natural gas and geological exploration, can solve problems such as no lubricant products, and achieve the effects of good mud cake adhesion and lubrication ability, reducing dosage and ensuring underground safety.

Active Publication Date: 2014-07-02
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

The above two types of lubricant products only meet the requirements in one lubricating function, and there is no lubricant product that meets the standards in both extreme pressure reduction friction resistance and mud cake adhesion reduction

Method used

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  • Method for preparing drilling fluid lubricant for reducing extreme pressure friction and mud cake adhesive friction
  • Method for preparing drilling fluid lubricant for reducing extreme pressure friction and mud cake adhesive friction
  • Method for preparing drilling fluid lubricant for reducing extreme pressure friction and mud cake adhesive friction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Put nonylphenol polyoxyethylene ether with a degree of polymerization of 4 (hereinafter referred to as OP-4) and polyphosphoric acid in a molar ratio of 4:1 in a reaction vessel, stir at 70°C for 30 minutes, then raise the temperature to 100°C and stir for 30 minutes. Then cooled to room temperature to prepare the extreme pressure additive with surface activity. In the extreme pressure additive, the molar ratio of each component is: OP-4-PO 3 h 2 :OP-4:H 3 PO 4 =3:1:1, OP-4-PO 3 h 2 for C 9 h 19 C 6 h 4 O(C 2 h 4 O) 4 PO 3 h 2 .

Embodiment 2

[0051] Put nonylphenol polyoxyethylene ether with a degree of polymerization of 7 (hereinafter referred to as OP-7) and polyphosphoric acid in a molar ratio of 4:1 in a reaction vessel, stir at 50°C for 60 minutes, then raise the temperature to 150°C, and stir for 20 minutes , and then cooled to room temperature to obtain a surface active extreme pressure additive. The molar ratio of each component in the extreme pressure additive is: OP-7-PO 3 h 2 :OP-7:H 3 PO 4 =3:1:1,OP-7-PO 3 h 2 for C 9 h 19 C 6 h 4 O(C 2 h 4 O) 7 PO 3 h 2 .

Embodiment 3

[0053] Put nonylphenol polyoxyethylene ether (OP-10) with a degree of polymerization of 10 and polyphosphoric acid in a molar ratio of 4:1 in a reaction vessel, stir at 50°C for 1 hour, then heat up to 90°C and stir for 2 hours, then cool to room temperature to obtain a surface active extreme pressure additive. The molar ratio of each component in the extreme pressure additive is: OP-10-PO 3 h 2 :OP-10:H 3 PO 4 =3:1:1,OP-10-PO 3 h 2 for C 9 h 19 C 6 h 4 O(C 2 h 4 O) 10 PO 3 h 2 .

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Abstract

The invention discloses a drilling fluid lubricant, which is prepared from the following components in percentage by mass: 0.1-15% of mud cake adhesive lubrication improver, 0-4% of triethanolamine, 0.01-30% of extreme pressure additive with surface activity and the balance of oil. The lubricant shows good lubricating performance on the aspects of mud cake adhesive lubrication and extreme pressure lubrication in drilling fluid, and does not arouse foaming of the drilling fluid. The lubricant can be widely applied in the field of drilling fluid of petroleum and natural gas, geological prospecting and the like.

Description

technical field [0001] The invention relates to the fields of petroleum and natural gas and geological exploration, in particular to a preparation method of a drilling fluid lubricant used in drilling operations with dual functions of reducing extreme pressure friction and reducing mud cake adhesion friction. Background technique [0002] In drilling operations, the energy lost due to friction accounts for more than 70% of the total energy generated 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 of great significance to drilling engineering. There are many ways to reduce friction loss, and adding lubricant to drilling fluid is one of the main technical means. [0003] According to the mechanism of reducing the friction between the drilling tool and the well wall, the drilling fluid lubricant can be divided into two categor...

Claims

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Application Information

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IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/28C09K2208/34
Inventor 解洪祥王绪美赵福祥周振良贾东民左凤江尹静刘彦妹张恩平贾利军李洪俊虞海法
Owner BC P INC CHINA NAT PETROLEUM CORP