Energy-saving, purifying and environment-friendly system for drilling fluid

Abstract

The invention relates to an energy-saving, purifying and environment-friendly system for drilling fluid, and belongs to a device for communicating an open hole and surface drilling fluid curing equipment in a petroleum drilling process. The system comprises a rock debris pool and a drilling fluid backflow pool, and further comprises a drilling fluid isolating and collecting device, a surface wellhead device and a wellhead energy-saving and purifying device, wherein, the drilling fluid isolating and collecting device is a groove body with an opening in the top end, the bottom of the drilling fluid isolating and collecting device is located on the ground, a hole I, a hole II and a hole III which penetrate through the groove bottom are formed in the groove bottom of the drilling fluid isolating and collecting device, and the hole I, the hole II and the hole III correspond to a well mouth, a rat hole and a mouse hole which are located in the ground respectively. The energy-saving, purifying and environment-friendly system for the drilling fluid is reasonable in structural design, the drilling fluid isolating and collecting device can collect and utilize scattered drilling fluid generated in the drilling process and drilling fluid generated when the rat hole and the mouse hole circulate, and recycle the drilling fluid in a mud umbrella on a blowout preventer, and the drilling fluid is prevented from making contact with soil.

Description

technical field [0001] The invention belongs to a device for connecting an open well hole and surface drilling fluid solidification equipment in the process of oil drilling, and in particular relates to an energy-saving, purification and environmental protection system for drilling fluid. Background technique [0002] In the process of oil drilling, the circulating drilling fluid removes the rock powder at the bottom of the hole and cools the drill bit when it flows from the bottom of the hole to the hole. After the drilling fluid carrying rock powder returns to the drilling hole, the rock powder must be purified on the ground before being sent into the hole, otherwise it will seriously affect the working performance and working life of the power machine at the bottom of the hole, affecting the drilling speed of the drill bit and lubricating the drilling tool And the effect of protecting the hole wall. The existing drilling fluid treatment method in the drilling constructio...

AI Technical Summary

Problems solved by technology

After the drilling fluid carrying rock powder returns to the drilling hole, the rock powder must be purified on the ground before being sent into the hole, otherwise it will seriously affect the working performance and working life of the power machine at the bottom of the hole, affecting the drilling speed of the drill bit and lubricating the drilling tool And the effect of protecting the hole wall

The existing drilling fluid treatment method in the drilling construction process is to directly dig a square pit on the land near the wellhead, and pour the drilling fluid directly into the pit for treatment. The way that drilling fluid contacts and pollutes the surface can no longer meet the national environmental protection requirements for drilling construction sites. Direct contact between drilling fluid and surface soil will pollute the soil environment, and it is not conducive to the recycling and reuse of treated drilling fluid, resulting in The waste of drilling fluid increases the operating cost; the drilling fluid cannot be desanded in time after it comes out of the well, and it is easy to cause a large amount of fine sand to enter the mud tank, resulting in high sand content in the drilling fluid, and the workload of cleaning the mud tank in the later stage is relatively heavy large; and the existing drilling fluid adopts tank-type weighting treatment method, which is very easy to produce barite powder deposition during the tank-type weighting process, resulting in waste of production materials; and when the drilling fluid is purified in winter in the north, due to Low temperature and poor fluidity can easily cause drilling fluid to freeze and cannot be processed

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