Drilling, grinding and pigging method and device for coiled tubing with screw drill and application

A kind of oil pipe and screw technology, which is applied to the drilling driving device, drilling equipment, drilling tools and other directions in the wellbore, can solve the problems of long mud completion time, easy blockage of drilling and grinding tools, mud cementation and sedimentation, etc., to enhance the carrying capacity , Eliminate the risk of damage to the casing, reduce the effect of liquid wear resistance

Pending Publication Date: 2020-05-05
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 invention provides a drilling and milling method for coiled tubing with auger drilling. The purpose is to solve the above-mentioned problems, and solve the problem that the drilling and grinding tools are easy to be blocked in the mud during drilling and grinding due to the long completion time of the mud, and the drilling and grinding tools are easily blocked in the mud. The grinding efficiency is extremely low and there is a risk of damaging the casing

Method used

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  • Drilling, grinding and pigging method and device for coiled tubing with screw drill and application

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A coiled tubing belt screw drilling method for drilling and grinding wells, the method comprising:

[0027] Circulate the guar base fluid in the well when drilling and grinding the well.

[0028] In the above-mentioned embodiments, the guar gum base fluid is generally used in the oilfield fracturing technology, and the guar gum base fluid is used to increase the viscosity. The friction resistance of the liquid improves the construction displacement and enhances the carrying capacity, and finally the mud in the well is effectively washed out, which can be successfully passed to the bottom of the artificial well, providing a qualified wellbore environment for later construction, and also eliminating the risk of damage to the casing. At the same time of normal construction operation, it can quickly and satisfactorily relieve the wellbore complexity caused by the cementation and sedimentation of drilling mud, improve the production timeliness, and create a new mode for the ...

Embodiment 2

[0030] Further, another embodiment of the drilling and milling method of a kind of coiled tubing band screw drilling method of the present invention, before the guar gum base fluid is circulated in the well when drilling and milling the well, it also includes:

[0031] Prepare guar gum base solution according to the concentration of 0.2%-0.25%.

[0032] In the above-mentioned embodiment, in the use of guar gum base fluid, the concentration is controlled between 0.2%-0.25%, which is compatible with the purpose of increasing the construction displacement, enhancing the carrying capacity and effectively washing out the mud in the well, while considering To the force of liquid viscosity, this concentration has the least influence on various operations in normal construction.

Embodiment 3

[0034] Further, another embodiment of the drilling and milling method of coiled tubing with screw drilling in the present invention uses a coiled tubing with screw drilling and milling string whose end is a tricone bit to conduct well drilling in the well;

[0035] Through the well to the bottom of the artificial well.

[0036] In the above-mentioned embodiment, the end of the coiled tubing with screw drilling and milling string in the existing construction adopts the flat-bottomed grinding shoe drill tool, because the mud completion time is long, the mud is cemented and precipitated, and the flat-bottomed grinding shoe is easy to block in the mud , resulting in extremely low drilling and grinding efficiency. The end of the coiled tubing with screw drill drilling and grinding string is used with a three-cone bit, which can not only ensure that the bit has very good adaptability in the cemented and sedimented mud, but also It can effectively guarantee the smooth flow of the dri...

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Abstract

The invention relates to a drilling, grinding and pigging method and device for a coiled tubing with a screw drill and application, belongs to the technical field of oil and gas field well repair andcompletion. The drilling, grinding and pigging method for the coiled tubing with the screw drill comprises the step of circulating guanidine gum base liquid in a well during drilling, grinding and pigging. The adopted guanidine gum base liquid reduces liquid friction resistance, improves construction displacement, strengthens carrying capacity, finally effectively washes out mud in a well, can besuccessfully led to an artificial well bottom, provides a qualified wellbore environment for later construction, eliminates the risk of damage to a casing pipe, can quickly and perfectly relieve complex wellbores caused by cementation and precipitation of drilling mud while not influencing normal construction operation, improves the production efficiency and creates a new mode for horizontal wellcoiled tubing well pigging and flushing operation.

Description

technical field [0001] The invention belongs to the technical field of workover and completion in oil and gas fields, and is applied in the construction operation of coiled tubing drilling and milling, and in particular relates to a method, device and application of coiled tubing belt screw drilling and milling well drilling. Background technique [0002] Oil service companies at home and abroad have developed the use of coiled tubing with screw drilling and grinding process strings to drill wells. [0003] In the process of implementing the embodiments of the present invention, the inventors found at least the following defects in the background technology: [0004] It takes a long time to complete the mud well, the mud is cemented and precipitated, and the drilling and grinding tools are easily blocked in the mud during drilling and grinding, resulting in extremely low drilling and grinding efficiency and the risk of damaging the casing. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B37/00E21B31/00E21B11/00E21B4/02
CPCE21B37/00E21B31/00E21B11/00E21B4/02
Inventor 包福忠王金刚李志杰王鸿章田玉琛刘波祁俊武宋凤军贺建军王志城袁海平殷学明霍晨晨毛金金宋超张林
Owner BC P INC CHINA NAT PETROLEUM CORP
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