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Treating agent as well as method and device for continuously reducing hydrogen sulfide in oil well shaft

A technology of treating agent and hydrogen sulfide, which is applied in wellbore/well components, earthwork drilling and production of fluids, etc., can solve the problems of waste, ineffectiveness, and less addition, and achieve the effect of convenient processing

Active Publication Date: 2012-08-01
PETROCHINA CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this method is that the formed metal sulfide may affect the storage performance of the reservoir, etc.
[0008] However, the methods for treating hydrogen sulfide in oil wells recorded in the above-mentioned prior art are all prepared as a liquid treatment agent, which is regularly injected into the well. The amount and frequency of injection are difficult to control. The output of well fluid causes waste, and the effect cannot be achieved if it is added less

Method used

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  • Treating agent as well as method and device for continuously reducing hydrogen sulfide in oil well shaft
  • Treating agent as well as method and device for continuously reducing hydrogen sulfide in oil well shaft
  • Treating agent as well as method and device for continuously reducing hydrogen sulfide in oil well shaft

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Embodiment 1

[0056] The treatment agent of this embodiment consists of: 38% industrial paraffin; 50% calcium hypochlorite; and 12% sodium carbonate.

[0057] According to the above ratio, heat the industrial paraffin to a molten state, then slowly add sodium carbonate and calcium hypochlorite, stir evenly, pour into a cylindrical mold, and cool to obtain a solid product. The diameter of the wax block is the same as the inner diameter of ordinary 3-inch tubing.

[0058] Use 10 meters of ordinary 3-inch oil pipe as the container body 2 for accommodating the treatment agent, set couplings 1 at both ends, and leave about 150mm from the couplings (about 150mm long) at both ends, and drill 6 holes with a diameter of 6mm symmetrically according to the circumference The through holes 3 of the pipe string are arranged in a triangle with a hole distance of 50mm along the straight line direction of the pipe string (see figure 1 ), the inside packs the cylindrical treating agent wax block of the pres...

Embodiment 2

[0063] The composition of the treatment agent in this embodiment: 30% industrial paraffin; 10% polyethylene wax; 50% calcium hypochlorite; and 10% sodium hydroxide.

[0064] According to the above ratio, industrial paraffin and polyethylene wax are heated to a molten state, then slowly add sodium carbonate and calcium hypochlorite, after stirring evenly, pour into a spherical mold and cool to obtain a solid treatment agent wax ball product (wax ball diameter 6mm ).

[0065] 10 meters of ordinary 3-inch oil pipe is used as the container body 2 for accommodating the treatment agent, and the two ends are provided with couplings 1, and the two ends are respectively set aside about 150mm from the coupling (150mm in length), and the laser cutting technology is adopted according to the circumferential symmetry. Cut out long slit-shaped through-holes 3 with a length of 10mm and a width of 2mm, 6 through-holes in a circle, and a slit distance of 20mm along the straight line of the pipe...

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Abstract

The invention provides a treating agent as well as a method and a device for continuously reducing hydrogen sulfide in an oil well shaft. The treating agent is a mixture prepared by uniformly mixing the following components: 30-40% of industrial paraffin wax, 0-10% of polyethylene wax, 50-60% of calcium hypochlorite and 10-20% of sodium hydroxide and / or sodium carbonate. The treating agent is prepared by the steps as follows: heating the industrial paraffin wax, or the industrial paraffin wax and the polyethylene wax to be molten, slowly adding the sodium hydroxide and / or the sodium carbonate and the calcium hypochlorite, uniformly stirring, pouring into a mould, cooling to prepare cylindrical or spherical substances with different diameters, and obtaining the treating agent as a solid product. The treating agent is placed in raw oil, the paraffin wax is slowly dissolved in the raw oil, and alkali for reducing the hydrogen sulfide is released to continuously reduce the hydrogen sulfide, so that the hydrogen sulfide in the raw oil can be removed before extracted from the mouth of a well, and the hazard caused by the hydrogen sulfide is eliminated.

Description

technical field [0001] The invention belongs to the prevention and control technology for reducing hydrogen sulfide in the wellbore of an oil field and eliminating it in the crude oil before the wellhead is produced, in particular to a treatment agent for continuously reducing hydrogen sulfide in the wellbore of an oil field, using the treatment agent to continuously reduce hydrogen sulfide A method of hydrogen sulfide in a wellbore, and an apparatus for carrying out the method. Background technique [0002] Hydrogen sulfide is a colorless gas with a specific gravity of 1.1895, which is heavier than air. At room temperature, the solubility of hydrogen sulfide in water is 3.864g / L, and the solubility in oil is 3.3g / L. The solubility is even greater under high pressure. When people inhale high concentration (1500mg / m 3 above), the poisoned person will quickly lose consciousness, accompanied by violent convulsions, momentary breathing stop, and then heartbeat stop, which is ca...

Claims

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Application Information

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IPC IPC(8): E21B43/38
Inventor 高玉军马春宝向延安徐恩宽胡贺元王德伟刘长环文健刘广友段效威王静苏野
Owner PETROCHINA CO LTD
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