Drilling fluid lubricant and drilling fluid

A drilling fluid and lubricant technology, applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of increased wear of drill pipes and drill collars, increased pressure difference sticking, poor lubrication effect, etc., to achieve pressure reduction Poor sticking, reduced wear, good lubricating effect

Inactive Publication Date: 2016-10-12
中石化石油工程技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The liquid drilling fluid lubricant in the drilling fluid used by the existing oil drilling equipment generally has poor lubrication effect under high temperature and high salt conditions, which increases the pressure difference sticking in deep well drilling construction, especially in irregular wells Increased wear on drill pipe and collars in radial and deviated wells and directional wells

Method used

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  • Drilling fluid lubricant and drilling fluid
  • Drilling fluid lubricant and drilling fluid
  • Drilling fluid lubricant and drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Synthesis of lubricants for drilling fluids:

[0014] According to the synthesis method and synthesis process technical conditions given, the lubricant for drilling fluid is synthesized according to the following weight ratio:

[0015] Base oil (special mineral oil), 4% surfactant (Span and Tween complexes), 2% carbon black (greater than 300 mesh), 5% molybdenum dialkyl dithiocarbamate, 5% bismuth Molybdenum Alkyl Dithiophosphate. The dark brown liquid obtained after the synthesis reaction is the lubricant for drilling fluid in Example 1 of the present invention.

[0016] Table 1 shows the lubricating performance evaluation results of the lubricant in this example in freshwater drilling fluid.

[0017] Table 1:

[0018] Lubricant addition / %

Adhesion coefficient reduction rate / %

Lubrication coefficient reduction rate / %

0

-

-

0.5

63.6

81.3

1.0

81.8

83.3

1.5

83.6

91.5

2.0

85.1

93...

Embodiment 2

[0022] Synthesis of lubricants for drilling fluids:

[0023] According to the synthesis method and synthesis process technical conditions given, the lubricant for drilling fluid is synthesized according to the following weight ratio:

[0024] Base oil (special mineral oil), 6% surfactant (Span class and Tween class compound), 2% carbon black (greater than 300 mesh), 10% molybdenum dialkyl dithiocarbamate, 10% bismuth Molybdenum Alkyl Dithiophosphate. The dark brown liquid obtained after the synthesis reaction is the extreme pressure lubricant for drilling fluid.

[0025] In this example, the composite brine drilling fluid was evaluated, and the reduction rate of the lubrication coefficient under different dosage conditions was measured respectively. The measurement results are shown in Table 2.

[0026] Table 2:

[0027] Lubricant addition / %

friction coefficient

Lubrication coefficient reduction rate / %

0

0.815

-

1.0

0.489

40.0 ...

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Abstract

The invention relates to a drilling fluid lubricant and drilling fluid used in oil drilling construction. The drilling fluid lubricant components include: base oil, surfactant, carbon black, molybdenum dialkyl dithiocarbamate and molybdenum dialkyl dithiophosphate; the parts by weight of each component are: base oil 51-86 2-6 parts of surfactant, 0-3 parts of carbon black, 5%-20 parts of molybdenum dialkyldithiocarbamate, 5-20 parts of molybdenum dialkyldithiophosphate. The invention has good lubricating effect in fresh water drilling fluid and composite brine drilling fluid, and has good temperature resistance, oxygen resistance and corrosion resistance.

Description

technical field [0001] The invention relates to a drilling fluid lubricant and drilling fluid used in oil drilling construction. Background technique [0002] The liquid drilling fluid lubricant in the drilling fluid used by the existing oil drilling equipment generally has poor lubrication effect under high temperature and high salt conditions, which increases the pressure difference sticking in deep well drilling construction, especially in irregular wells Increased wear on drill pipe and drill collars in radial and deviated wells and directional wells. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a drilling fluid lubricant that can have good lubricating effect in freshwater drilling fluid and composite brine drilling fluid, and has good temperature resistance, oxygen resistance and corrosion resistance and adopts This drilling fluid lubricant is the drilling fluid. [0004] The drilling fluid lubricant co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035C09K8/22
CPCC09K8/035C09K8/22C09K2208/34
Inventor 陈亮陈安明黄乘升林卫东
Owner 中石化石油工程技术服务有限公司
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