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Water-based well drilling waste harmless treatment device and method, and application

A technology for harmless treatment and drilling waste, which is applied in earthwork drilling, wellbore flushing, wellbore/well components, etc. It can solve the problems of not being broad-spectrum, increasing costs, wasting resources, etc.

Active Publication Date: 2018-07-24
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

This process can realize non-landing treatment while drilling and a simple system of drilling waste treatment, but the drilling fluid needs further treatment before being discharged or reinjected after gel breaking, destabilization and separation, which not only wastes resources, but also increases costs; it is not widely used. Spectrum, for deep well complex drilling waste such as polysulfonous drilling waste, it is difficult to achieve harmless treatment

Method used

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  • Water-based well drilling waste harmless treatment device and method, and application
  • Water-based well drilling waste harmless treatment device and method, and application
  • Water-based well drilling waste harmless treatment device and method, and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment provides a water-based drilling waste harmless treatment device, such as figure 1 As shown, the water-based drilling waste harmless treatment device includes a non-falling collection unit 1, a liquid phase regeneration treatment unit 2, a solid phase harmless treatment unit 3 and a solid phase recycling unit 4;

[0064] like figure 2 As shown, the non-falling collection unit 1 includes a double helix collection skid 8 , a solid phase plunger pump 12 , a screw receiving conveyor 11 and a drilling solids control vibrating screen 5 . like image 3 As shown, the liquid-phase regeneration treatment unit 2 includes a high-G vibrating screen 13, a frequency conversion centrifuge 14, an electrochemical processor 15 and a Pumai pump 16; Figure 4 The shown solid phase harmless treatment unit 4 includes a primary weighing and mixing screw machine 17 , a secondary mixing screw machine 18 and a harmless treatment agent dosing device 19 .

[0065] A first mortar ...

Embodiment 2

[0071] This embodiment also provides a water-based drilling waste harmless treatment process, which uses the water-based drilling waste harmless treatment device provided in Example 1 to treat a conventional natural gas well polymer system drilling waste, including the following step:

[0072] The drilling waste discharged from the drilling solid control vibrating screen 5 falls into the double-helix collection skid 8 through the chute, and the drill cuttings discharged from the centrifuge 7 of the drilling team are received by the spiral receiving conveyor 11 and then sent to the double-helix collection skid 8. After preliminary solid-liquid separation in the cache, the upper layer of liquid phase drilling waste (liquid content greater than 60%) is pumped into the high G vibrating screen 13 through the first mortar pump 9, and the pumping speed is controlled by the flow meter 10, and the lower layer of solid phase drilling waste The waste (with a liquid content less than 60%)...

Embodiment 3

[0076] This implementation provides a water-based drilling waste harmless treatment process, which uses the water-based drilling waste harmless treatment device provided in Example 1 to treat a shale gas well KCl-polymer system drilling waste, including the following step:

[0077] The drilling waste discharged from the drilling solid control vibrating screen 5 falls into the double-helix collection skid 8 through the chute, and the drill cuttings discharged from the centrifuge 7 of the drilling team are received by the spiral receiving conveyor 11 and then sent to the double-helix collection skid 8. After preliminary solid-liquid separation in the cache, the upper layer of liquid phase drilling waste (liquid content greater than 60%) is pumped into the high G vibrating screen 13 through the first mortar pump 9, and the pumping speed is controlled by the flow meter 10, and the lower layer of solid phase drilling waste The waste (with a liquid content less than 60%) is transpor...

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Abstract

The invention provides a water-based well drilling waste harmless treatment device and method, and application. The water-based well drilling waste harmless treatment device comprises a non-landing collecting unit, a liquid-phase regeneration treatment unit and a solid-phase harmless treatment unit, and the non-landing collecting unit communicates with the liquid-phase regeneration treatment unitand the solid-phase harmless treatment unit; and the liquid-phase regeneration treatment unit communicates with the solid-phase harmless treatment unit. According to the water-based well drilling waste harmless treatment device and method, the land cost and the treatment cost are saved, and the costs of well drilling waste harmless treatment, excavation of a landfill pool, seepage prevention and the like are saved; and indexes, such as pH, COD, color, petroleum type and the like, of a prepared base soil and burning-free building block leaching agent s after well drilling waste is subjected toharmless treatment reach the environmental protection requirement, the burning-free building blocks and the base soil reach the related building material standard, and regeneration and reuse and recycling of the well drilling waste are achieved.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field drilling environment protection in petrochemical industry, and relates to a water-based drilling waste harmless treatment device, method and application. Background technique [0002] Water-based drilling waste is one of the main wastes generated by oil and gas exploration and development drilling operations, accounting for 99% of the total drilling waste. According to different drilling fluid systems, it can be divided into polymer drilling fluid, polymer-KCl drilling fluid, polymer Sulfur drilling fluid and other types of drilling waste. Water-based drilling waste is a mixture of waste drilling fluid and drilling cuttings, containing clay, weighting materials, various chemical treatment agents, sewage and drilling cuttings, etc., with pollution characteristics such as high chroma, high COD, and high pH value, especially polysulfide Deep well complex drilling waste such as drilling was...

Claims

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Application Information

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IPC IPC(8): E21B21/06
CPCE21B21/068
Inventor 任雯谢水祥仝坤邓皓刘光全许毓张明栋刘晓辉孙静文李树森
Owner BC P INC CHINA NAT PETROLEUM CORP
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