Leaching agent for oily drilling cuttings and oily drilling waste and method of use thereof

A technology for drilling waste and drilling cuttings, which is applied in the field of leaching agent for deoiling treatment, can solve the problems of serious environmental pollution of oily operation waste, incomplete oil phase separation, and unsuitable treatment technology, so as to achieve reuse and avoid Secondary pollution and the effect of improving environmental performance

Active Publication Date: 2021-03-09
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The oil-containing operation waste generated by oil-based drilling fluid for drilling and completion operations is seriously polluted and difficult to deal with. The current physical, chemical and biological treatment technologies have not completely solved the problem of high energy consumption, incomplete oil phase separation, secondary Secondary pollution and other issues
Due to the unsuitable, immature and high cost of the current treatment technology, a large amount of drilling waste is mostly disposed of with simple treatment methods, which cannot fully meet the requirements of environmental protection, and there are great environmental risks

Method used

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  • Leaching agent for oily drilling cuttings and oily drilling waste and method of use thereof
  • Leaching agent for oily drilling cuttings and oily drilling waste and method of use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh raw materials: 10 g of oily drilling cuttings, 60 ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3.

[0036] Instructions:

[0037] Step 1: Place the weighed oily drill cuttings and leaching agent (60ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3) in a stirrer and stir for 7min at a shear rate of 300r / min;

[0038] Step 2: After stirring, let it stand for a period of time, wait for the solid phase to settle, the solid and liquid will separate naturally, then remove the lower layer, centrifuge the solid phase, and dry at 95°C for 24 hours;

[0039] Step 3: After the leached oily drill cuttings and the leaching agent are subjected to solid-liquid separation, the liquid phase is placed in a three-necked flask, and then distilled at a temperature of 120°C and a negative pressure difference of 0.01MPa to obtain emulsification Diesel and leaching agent.

[0040] The leaching agent in this example does not require s...

Embodiment 2

[0042] Raw materials were weighed: 10 g of oily drill cuttings, 58 ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3, and 2 ml of petroleum ether (boiling range: 60-90° C.).

[0043] Method of use: basically the same as in Example 1, except that the leaching agent is 58 ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3 and 2 ml of petroleum ether (boiling range is 60-90° C.).

Embodiment 3

[0045] Raw materials were weighed: 10 g of oily drill cuttings, 56 ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3, and 4 ml of petroleum ether (boiling range: 60-90° C.).

[0046] Method of use: basically the same as in Example 1, except that the leaching agent is 56 ml of polyoxymethylene dimethyl ether with a degree of polymerization of 3 and 4 ml of petroleum ether (boiling range is 60-90° C.).

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Abstract

The invention provides a leaching agent for oily drilling cuttings and oily drilling waste and its application method. The leaching agent comprises: 80-100 parts by volume of polyoxymethylene dimethyl ether, 0-20 parts by volume of methyl tert-butyl ether, and 0-20 parts by volume of petroleum ether. The method of using the leaching agent is as follows: mix oily drill cuttings and / or oily drilling waste with the leaching agent in a mixer; stir for a certain period of time at a certain shear rate for leaching, and let the solid phase settle naturally Finally, solid-liquid separation, after drying, oily drilling cuttings and / or oily drilling waste after deoiling treatment are obtained. The leaching agent of the present invention can simplify the treatment steps and cost of oily drilling cuttings / oily drilling waste, and after the oily drilling cuttings / oily drilling waste is treated, the content of oily substances can be effectively reduced and the oily substance content can be achieved to meet the discharge standard. Moreover, the leaching agent and emulsified diesel oil recovered by fractional distillation can be recycled, which greatly improves the recycling rate of oil-based drilling fluid and leaching agent.

Description

technical field [0001] The present invention relates to the field of drilling technology, in particular to a leaching agent for oily drilling cuttings and oily drilling waste and its application method, in particular to a leaching agent for oily drilling cuttings and oily drilling waste produced by using oil-based drilling fluid. A leaching agent for deoiling drilling waste and a method for using the same. Background technique [0002] In the process of oil and gas drilling, with the increasing number of complex wells such as deep wells, ultra-deep wells, shale gas horizontal wells and multi-lateral wells, the downhole situation is becoming more and more complicated, and the use of oil-based drilling fluid is to avoid downhole complex accidents an important way of happening. For the oil-based drilling fluid with many advantages, the composition of the drilling fluid contains a variety of toxic and harmful chemical substances. In addition to the components of the drilling fl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08C02F11/00C02F103/10
CPCB09C1/08C02F11/002C02F2103/10
Inventor 王建华徐显广王立辉纪托邱心明王新锐闫丽丽可点刘裕双杨海军张玮崔小勃李龙
Owner BC P INC CHINA NAT PETROLEUM CORP
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