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Method for feeding drilling fluid with high gas content by using reciprocating drill pump

A drilling pump and drilling fluid technology, used in wellbore/well components, earthwork drilling, wellbore flushing, etc., can solve the problems of high maintenance cost, insufficient pressure of high-pressure air compressor, complicated maintenance technology, etc. Gas drilling fluid, simple method, and the effect of improving efficiency

Inactive Publication Date: 2005-08-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high price of high-pressure air compressors (the price of an imported one is 350,000 to 500,000 US dollars, and the price of a domestic one is about 3 million yuan), the maintenance cost is high and the maintenance technology is complicated, resulting in an increase in the drilling cost of gas-bearing drilling fluid
At the same time, in deep well aerated fluid drilling, there are still problems such as insufficient pressure of high-pressure air compressors
Therefore, the application and promotion of this technology are subject to certain restrictions

Method used

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  • Method for feeding drilling fluid with high gas content by using reciprocating drill pump
  • Method for feeding drilling fluid with high gas content by using reciprocating drill pump
  • Method for feeding drilling fluid with high gas content by using reciprocating drill pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1: Efficient pumping of microfoam drilling fluid for drilling operations.

[0044] When microfoam drilling is adopted, the modified reciprocating drilling pump and matching injection pump are directly used to realize the method. Figure 6 The flow chart of realizing microfoam drilling fluid drilling for this method. Its working process is as follows: the microfoam drilling fluid 7 is injected into the modified reciprocating drilling pump 9 through the infusion pump 8, and enters the wellbore 10 through the discharge pipeline after compression, thereby achieving the purpose of efficiently pumping the microfoam drilling fluid. For a microfoam drilling fluid with a given gas content, its pumping efficiency can be determined by a corresponding calculation program.

Embodiment 2

[0045] Embodiment 2: A low-pressure air compressor is connected in series with a modified reciprocating drilling pump to realize high-pressure foam drilling.

[0046] Such as Figure 7 As shown, the modified reciprocating drilling pump 9 is selected, matched with a low-pressure base fluid pump 13 and a low-pressure air compressor 11 (there are four possibilities of 0.8MPa, 1.2MPa, 1.8MPa, and 2.4MPa) to realize this method.

[0047] Its working process is as follows: the low-pressure air compressor 11 boosts the air and discharges it to the front of the foam generator 14 through the one-way valve, and enters the foam generator 14 together with the foam base liquid 12 discharged through the base liquid pump 13 to mix and foam, and then The foam passes through the modified reciprocating drilling pump 9, and after being compressed, it enters the wellbore 10 through the discharge pipeline, so as to achieve the purpose of using the reciprocating pump to achieve high-pressure foam d...

Embodiment 3

[0048] Example 3: Utilize the modified reciprocating pump to realize ultra-high pressure injection of gas-containing drilling fluid for drilling operations.

[0049] Figure 8 This method is a flow chart of realizing ultra-high pressure foam drilling by using the modified reciprocating pump and high-pressure air compressor in series. Its working process is as follows: After the low-pressure air compressor 11 and the high-pressure air compressor 15 boost the air pressure, they enter the foam generator 14 together with the foam base liquid 12 discharged from the base liquid pump 13 to mix and foam, and then the foam passes through the modified The reciprocating drilling pump 9 enters the wellbore 10 through the discharge pipeline after being compressed, so as to achieve the purpose of ultra-high pressure foam drilling by using the modified reciprocating pump and high-pressure air compressor in series. For the given low and high pressure air compressor pressure, the gas-liquid r...

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Abstract

The method of utilizing reciprocating well drilling pump in conveying drilling fluid with high gas content includes the following steps: 1) adopting reciprocating well drilling pump with large cylinder lining, great work volume and clearance volume reduced in filler block technique for efficient pumping of drilling fluid with high gas content; and 2) pumping micro foam drilling fluid with the said reciprocating drilling pump for well drilling job directly or realizing high pressure or super high pressure well drilling job via combination with other in-situ apparatus. The present invention is simple, reliable and low in cost.

Description

technical field [0001] The invention relates to a method for using a reciprocating drilling pump to transport high-gas drilling fluid, which belongs to the drilling operation technology method using micro-foam drilling fluid, foam drilling fluid and aerated drilling fluid, and is mainly used in oil and natural gas mining industries and coalbed methane mining industries middle. Background technique [0002] Drilling with gas-containing drilling fluid (micro-foam drilling fluid, foam drilling fluid and aerated drilling fluid) is one of the methods to achieve underbalanced drilling. Its main advantages are: drilling under negative pressure can protect oil and gas layers from pollution; Gas drilling fluid has high viscosity and shear stress, strong ability to carry rock and clean the bottom of the hole; the life of the drill bit is long, the ROP is fast; it has the ability to prevent leakage and eliminate leakage, etc. Due to the above-mentioned many unique advantages of gas-be...

Claims

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Application Information

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IPC IPC(8): E21B21/14
Inventor 孟英峰梁红吴仁荣陈刚李永杰练章华李又绿李晓萍
Owner SOUTHWEST PETROLEUM UNIV
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