Circulating drilling fluid non-landing solid-liquid separation method
A technology for circulating drilling fluid and solid-liquid separation, which is applied in drilling compositions, chemical instruments and methods, and earth-moving drilling, etc. To environmental protection requirements and other issues, the solid control system is simple, the hydration of drill cuttings is inhibited, and the overall drilling time is reduced.
Active Publication Date: 2015-03-18
东营市大用石油助剂有限责任公司
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Problems solved by technology
However, these treatment methods generally have the problem of incompatibility between economic benefits and environmental benefits: methods with good environmental benefits have too high economic costs; those with low economic costs often fail to meet environmental protection requirements
Other chemical additives used to destabilize, flocculate, and separate drilling fluid waste introduced in the above treatment process, or a large amount of water used to clean solids, all of which increase resource consumption virtually and increase new waste pollution. , so the above method is only the transfer of drilling fluid waste rather than the real recycling
In addition, the ultrafiltration or reverse osmosis treatment described in the above-mentioned patent documents purifies the preliminarily purified waste liquid and obtains waste water that meets the discharge standard. Additional filters and reverse osmosis devices are required. The replacement of these devices and filter elements not only greatly Increased economic costs, and these devices take up a lot of space resources, at the same time, waste filter elements will also cause secondary pollution to the environment
Method used
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Embodiment 1
[0066] The preparation of embodiment 1 mosaic shielding agent
[0067] Add 100g of quartz sand with a particle size of 40-50μm, 2000g of acrylamide monomer, 260g of benzoyl peroxide and 200g of sodium lauryl sulfate into water, raise the temperature to 60°C, react for 3 hours, and dry to obtain a mosaic shield Agent A.
Embodiment 2
[0068] The preparation of embodiment 2 mosaic shielding agent
[0069] The mosaic shielding agent B was prepared in the same manner as in Example 1, except that 100 g of quartz sand with a particle size of 100 μm was used.
Embodiment 3
[0070] The preparation of embodiment 3 mosaic shielding agent
[0071] Add 100 g of quartz sand with a particle size of 200-250 μm, 1200 g of acrylamide monomer, 150 g of tert-butyl peroxyvaleric acid and 100 g of triethylhexyl phosphoric acid into water, raise the temperature to 70 ° C, and form a long chain after the reaction is completed The polymer was dried to obtain the mosaic shielding agent C.
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Abstract
The invention discloses a circulating drilling fluid non-landing solid-liquid separation method. As inlay shielding drilling fluid is used, circulating drilling liquid can be easily separated through a mechanical method; the liquid phase is recycled for preparing the inlay shielding drilling fluid; and the solid phase is recycled to really realize the drilling fluid non-landing purpose.
Description
technical field [0001] The invention relates to a process technology for comprehensive utilization of output fluid in downhole operations in oil and gas fields without falling to the ground, and in particular to a solid-liquid separation method in which circulating drilling fluid does not fall to the ground. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process. It is called the blood of drilling. It is an extremely important part of drilling engineering. Its basic functions include carrying and suspending cuttings, stabilizing the well wall and balancing pressure, and cooling Lubricate drilling tools. One of the main functions of drilling fluid is to carry cuttings from the bottom of the well to the surface. The drilling fluid from the bottom of the well and the waste together form a multiphase stable suspension, which contains many substances harmful to the environment, such as oils and chemical additiv...
Claims
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IPC IPC(8): E21B21/06C09K8/12
CPCC09K8/12E21B21/065
Inventor 韩阳杨小平黄禾
Owner 东营市大用石油助剂有限责任公司