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Defoaming device and defoaming method for removing foam of drilling fluid by means of linkage of negative pressure and thermal radiation

A defoaming device and heat radiation technology, which is applied in the direction of earthwork drilling, flushing wellbore, wellbore/well parts, etc., can solve the problem of single defoaming method and achieve the effect of saving energy

Inactive Publication Date: 2013-02-27
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the above-mentioned physical method of defoaming, only a single defoaming method is usually used, and the method of using multiple comprehensive physical defoaming methods has not been reported yet.

Method used

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  • Defoaming device and defoaming method for removing foam of drilling fluid by means of linkage of negative pressure and thermal radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1 of the present invention such as figure 1 As shown, it includes a cylindrical tank body 3, which is characterized in that the top of the tank body 3 has a foam inlet 1, a gas outlet 6 and a manometer 5 with a pressure sensor, the foam inlet 1 is connected to a control valve 14; the gas outlet 6 Connect the vacuum pump 13; the upper part of the tank body 3 is provided with a perforated partition 2, the heat radiation part 7 is provided under the perforated partition 2, the middle position of the tank body 3 is located below the heat radiation part 7, and the umbrella plate 4 is arranged, and the heat radiation part 7 A temperature sensor 11 is set in the middle of the umbrella plate 4; a liquid level sensor 8 is installed in the middle and lower part of the side of the tank body, and a layer of heating tape 10 is covered on the periphery of the tank body 3; The slag outlet 9 is connected to the water pump 12; the pressure sensor on the pressure gauge 5, the ...

Embodiment 2

[0045] A method for defoaming using the above-mentioned negative pressure and heat radiation linkage defoaming device, the steps are as follows:

[0046] 1) Connect the DC power supply and power supply in the defoaming device, and the pressure sensor, temperature sensor and liquid level sensor on the pressure gauge start to work;

[0047] 2) Set the temperature range of the temperature sensor to 50-100°C, turn on the power control switch of the heat radiation part and the heating cable to start heating, when the temperature in the tank is higher than the upper limit of the set value by 100°C, turn off the heat The power control switch of the radiating part and the heating cable makes it stop heating, and then the heating cable turns to the heat preservation mode. When the temperature in the tank is lower than the lower limit of the set value by 50°C, the power control switch of the heat radiation part and the heating cable is turned on to make it start heating;

[0048] 3) Un...

Embodiment 3

[0053] Same as Example 2, except that the internal pressure of the tank is different from the speed at which the foam is introduced.

[0054] 1) Connect the DC power supply and power supply in the defoaming device, and the pressure sensor, temperature sensor and liquid level sensor on the pressure gauge start to work;

[0055] 2) Set the temperature range of the temperature sensor to 50-100°C, turn on the power control switch of the heat radiation part and the heating cable to start heating, when the temperature in the tank is higher than the upper limit of the set value by 100°C, turn off the heat The power control switch of the radiating part and the heating cable makes it stop heating, and then the heating cable turns to the heat preservation mode. When the temperature in the tank is lower than the lower limit of the set value by 50°C, the power control switch of the heat radiation part and the heating cable is turned on to make it start heating;

[0056] 3) Under the abov...

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Abstract

A defoaming device and a defoaming method for removing foam of drilling fluid by means of linkage of negative pressure and thermal radiation belong to the technical field of physical defoaming of drilling fluid. The device comprises a cylinder tank body and is characterized in that a thermal radiation part is arranged in the tank body, a vacuum pump and a water pump are connected to the outer side of the tank body, and the whole set of device comprises a pressure sensor, a temperature sensor, a liquid level sensor, and the like. The core thought of the device provided by the invention is to adopt the mode of combining the negative pressure and thermal radiation technologies. Firstly, the foam is guided into the closed tank body, a container is vacuumed by the vacuum pump to make internal and external pressure difference for the foam, in addition, the thermal radiation part is used to heat to enable the gas in the foam in the tank body to expand, then the foam is rapidly removed under the actions of the vacuum pump and the thermal radiation part, and the foam base solution and solids carried by the foam are discharged from a liquid and slag discharge port. According to the defoaming device, a large amount of foam discharged from foam drilling is quickly removed, the foam is prevented from being accumulated in a mine field, and the foam base solution is not affected and can be recycled.

Description

technical field [0001] The invention relates to a defoaming device and method for eliminating foam in drilling fluid through the linkage of negative pressure and heat radiation, and belongs to the technical field of physical defoaming of drilling fluid. Background technique [0002] The use of foam as a circulating fluid for workover and drilling began in the 1960s. Foam fluid is an underbalanced drilling medium, which is composed of water, gas, foaming agent, stabilizer and other chemicals. Compared with traditional mud drilling fluids, foam drilling has the advantages of increasing drilling speed, avoiding or reducing drilling accidents, reducing formation damage, increasing single well production, helping to discover oil and gas reservoirs, protecting the environment, and reducing operating costs for production stimulation measures. It plays an important role in the development of low permeability and low pressure reservoirs, unconventional oil and gas resources and the ...

Claims

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Application Information

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IPC IPC(8): E21B21/06E21B21/14
Inventor 李德春李英曹利华孙凯
Owner SHANDONG UNIV
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