Oil-based lubricant and application thereof

An oil-based lubricant, an alkyl technology, applied in oil-based lubricants and their application fields, can solve the problem of high production cost

Inactive Publication Date: 2014-04-02
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the above-mentioned oil-based lubricants, some oils are modified through complex synthesis techniques, and the production cost is relatively high

Method used

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  • Oil-based lubricant and application thereof
  • Oil-based lubricant and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] It is obtained by mixing 50 parts by mass of cottonseed oil and 50 parts by mass of zinc octyl alkyl dithiophosphate.

Embodiment 2-6

[0027] The preparation method is the same as in Example 1, and the amounts of each material are shown in the table below.

[0028]

[0029] Lubrication Performance Evaluation

[0030] Measure 300mL of distilled water, add 36g of sodium bentonite for drilling fluid test, stir at a high speed of 11,000r / min for 20min, and maintain in a closed container at room temperature for no less than 16h to prepare a prehydrated bentonite slurry with a soil content of 12%. ; Prepare 2 parts of polymer slurry: Measure 250mL of seawater, add 56g of pre-hydrated bentonite slurry, 0.6g of caustic soda, 0.6g of soda ash, 0.9g of PF-PAC LV, 0.9g of PF-XC and 9g of calcium soil, and add weight with barite to 1.2g / cm 3 , stir at a high speed of 11000r / min for 20min, after curing for 4h, stir at a high speed of 11000r / min for 20min; add 6g of the oil-based lubricant prepared in each embodiment to one of the muds, and use a speed of 11000r / min Stir at high speed for 20 minutes, which is the poly...

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Abstract

The invention relates to an oil-based lubricant and application thereof to a water-based drilling fluid. The oil-based lubricant comprises 30-70 parts of zinc dialkyl dithiophosphate and 30-70 parts of plant oil by mass. When the zinc dialkyl dithiophosphate and the plant oil are compounded into the lubricant for the water-based drilling fluid, a synergistic effect is achieved, so that the oil-based lubricant greatly reduces the rotating frictional resistance of a drill, has extreme pressure resistance and greatly improves the lubrication of the drilling fluid.

Description

technical field [0001] The invention relates to an oil-based lubricant and its application in water-based drilling fluid. Background technique [0002] Drilling fluid refers to the general name of various circulating fluids that meet the needs of drilling work with its multi-functionality in the process of oil and gas drilling, commonly known as "mud". The basic functions of drilling fluid are: (1) carrying and suspending cuttings; (2) stabilizing the well wall and balancing formation pressure; (3) cooling and lubricating the drill bit; (4) transmitting hydrodynamic force. [0003] The lubricating performance of drilling fluid has a great influence on drilling work. Especially in drilling deep wells, directional wells, horizontal wells and cluster wells, the rotation resistance and pulling resistance of the drill string will be greatly improved. The main adjustable factor affecting the drilling torque and resistance and the wear of the drilling tool is the lubrication perf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 夏小春耿铁项涛
Owner CHINA NAT OFFSHORE OIL CORP
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