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Screening process of airtight vibrating screen for petroleum drilling fluid

An oil drilling and vibrating screen technology, applied in the field of oil drilling, can solve the problems of easily endangering the operator's manual safety, inapplicability, etc., and achieve the effects of reducing cost input, reducing the incidence of safety accidents, and improving efficiency

Inactive Publication Date: 2015-06-17
SICHUAN XILIN OIL SUPPLIES EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the oil drilling fluid screening equipment in the prior art is not suitable for oil fields with high sulfur content, and is likely to endanger the artificial safety of operators, and to provide a kind of oil drilling fluid with safe operation, low price, environmental protection and energy saving. Screening process of closed vibrating screen

Method used

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  • Screening process of airtight vibrating screen for petroleum drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The equipment used in the screening process of the closed vibrating screen for petroleum drilling fluid mainly includes a liquid drainage mud pump, an exhaust device, a closed screening device and a sulfur removal device.

[0033] Wherein, the liquid drainage mud pump is preferably a BW-250 mud pump.

[0034] The exhaust device is composed of a sealed cavity, a feed inlet and an air outlet arranged at the top of the sealed cavity, and a material outlet and an air inlet arranged at the bottom of the sealed cavity.

[0035] The airtight screening device consists of an airtight box, a vibrating screen installed obliquely inside the airtight box, a collection pool directly below the vibrating screen, and a spiral screen directly below the lowest end of the vibrating screen. The chip removal machine is composed of an air outlet on the top of the airtight screening device. The airtight box of the airtight screening device is provided with a material inlet, a material outlet,...

Embodiment 2

[0045] The difference between this embodiment and Embodiment 1 is that the number of the exhaust devices is two, and they are respectively named as the first exhaust device and the second exhaust device. The specific process flow is as follows:

[0046] (1) The mud is pumped into the first exhaust device from the feed port of the first exhaust device through the liquid discharge mud pump, and the hydrogen sulfide gas is separated from the mud, and the mud in the first exhaust device is passed through the booster pump. Into the second exhaust device, the mud is separated from the hydrogen sulfide gas again in the second exhaust device;

[0047] (2) The mud separated in the second exhaust device enters the closed screening device, and the hydrogen sulfide gas in the mud is volatilized again through the closed screening device, and the mud is separated into recovered slurry and particles through the closed screening device scrap;

[0048] (3) Pass the hydrogen sulfide gas in ste...

Embodiment 3

[0050] The only difference between this embodiment and Embodiment 1 is that in the step (1), when the mud is pumped into the exhaust device by the drainage mud pump, inert gas is also passed into the exhaust device. An air suction pump is arranged on the air inlet of the desulfurization device.

[0051] When in use, it is sufficient to feed an inert gas through the inert gas inlet, and in the present invention, the inert gas is preferably argon.

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Abstract

The invention discloses a screening process of an airtight vibrating screen for petroleum drilling fluid. The screening process of the airtight vibrating screen for the petroleum drilling fluid mainly solves the problem that existing petroleum drilling fluid screening equipment is not suitable for oil fields high in sulphur content. The screening process comprises the steps that firstly, slurry is pumped into an exhaust device through a liquid drainage slurry pump, and hydrogen sulfide gas is separated from the slurry; secondly, the separated slurry enters an airtight screening device, hydrogen sulfide gas in the slurry is made to volatilize again through the airtight screening device, and the slurry is separated into slurry liquid to be recycled and particle waste through the airtight screening device; thirdly, the hydrogen sulfide gas obtained in the first step and the hydrogen sulfide gas obtained in the second step are both led into a desulphurizing device for desulphuration, and the desulphurized gas goes back to the exhaust device. The screening process of the airtight vibrating screen for the petroleum drilling fluid has the advantages of being safe to operate, being environmentally friendly and capable of saving energy and the like.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to drilling fluid processing equipment. Background technique [0002] Oil drilling mud shaker is an important equipment to reduce the solid phase content in drilling fluid. Drilling fluid circulating from the downhole to the surface must first pass through the shale shaker to remove solid particles with large diameters before entering the desander or desilter to further reduce the solid content. [0003] According to reports, the Tazhong and Halahatang blocks are high-sulfur areas in the oilfield, with the highest hydrogen sulfide content reaching 20,000ppm. Drilling in high-sulfur oil and gas fields, during the drilling process, once the hydrogen sulfide in the oil and gas well circulates back to the wellhead with the mud, the drilling fluid circulated to the ground contains more hydrogen sulfide. After the drilling fluid reaches the surface, hydrogen sulfide is separ...

Claims

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Application Information

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IPC IPC(8): E21B21/06
CPCE21B21/067E21B21/065
Inventor 贺昶明
Owner SICHUAN XILIN OIL SUPPLIES EQUIP