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Charging system for well-drilling fluid lubricant

A feeding system and drilling fluid technology, which is applied in earthwork drilling, wellbore flushing, wellbore/well parts, etc., can solve problems such as excessive lubricant addition and unsatisfactory lubrication effect

Pending Publication Date: 2019-06-11
SINOPEC SSC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a disadvantage of adding too much lubricant, but the lubricating effect is unsatisfactory

Method used

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  • Charging system for well-drilling fluid lubricant

Examples

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Effect test

Embodiment Construction

[0012] refer to figure 1 , a feeding system for a drilling fluid lubricant, comprising a drilling fluid tank 1, a mud pump 3 and a pipeline 4 connected between the drilling fluid tank and the mud pump, a lubricant feeding funnel 2 is set in the drilling fluid tank 1, and the lubricant The discharge port of the feeding funnel 2 is adjacent to the drilling fluid outlet of the drilling fluid tank.

[0013] Further, the lower part of the lubricant feeding funnel is S-shaped.

[0014] Furthermore, the outlet of the lubricant feeding funnel is an outlet on an inclined plane, and the outlet is opposite to the drilling fluid outlet of the drilling fluid tank.

[0015] The working flow of the device is: when the drilling friction needs to be reduced, the drilling fluid lubricant is added from the lubricant feeding funnel 2 . The high-concentration lubricant is pumped into the wellbore, sprayed out from the drill bit, and adsorbed on the porous rock on the well wall in large quantitie...

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Abstract

The invention relates to a charging system for a well-drilling fluid lubricant. The charging system comprises a well-drilling fluid tank, a mud pump, a pipeline connected between the well-drilling fluid tank and the mud pump, and a lubricant charging funnel arranged in the well-drilling fluid tank, and a discharging outlet of the lubricant charging funnel is closely adjacent to a well-drilling fluid outlet of the well-drilling fluid tank. The lower part of the lubricant charging funnel is in an S shape. According to the charging system for the well-drilling fluid lubricant, the more lubricantcan be adsorbed at a well bottom instead of being evenly distributed on the well-drilling fluid and the whole well wall, in this way, the efficiency of the well-drilling fluid lubricant can be improved, friction resistance is reduced advantageously, and the charging system is especially suitable for well drilling of a long horizontal well and a large-displacement well.

Description

technical field [0001] The invention relates to a drilling fluid feeding device for petroleum drilling, belonging to the technical fields of petroleum engineering and oil field chemistry. Background technique [0002] During the drilling process, when the drill pipe rotates, there will be friction between the drill pipe and the well wall, and the friction force and friction coefficient are directly proportional to the pressure. Due to the fluid column pressure of the drilling fluid, the deeper the well, the greater the pressure and the greater the friction. In order to reduce friction, the common method is to add lubricant directly to the mud tank, under the action of the agitator installed in the mud tank, stir evenly, and then pump it into the bottom of the well by the mud pump, and circulate continuously. This way of adding lubricant is usually The frictional resistance is not significantly reduced, and the effect is poor. [0003] Improving the lubrication performance ...

Claims

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Application Information

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IPC IPC(8): E21B21/00E21B21/06
Inventor 马云谦赵怀珍王忠杰罗云凤刘保双
Owner SINOPEC SSC
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