Mud weighting technology and special device thereof

Abstract

The invention relates to a mud weighting technology and a special device thereof, belonging to the technical field of a petroleum exploration and development drilling mud weighting technology. The special device consists of a mud pit, a sand pump, an air compressor, a limestone powder tank and a limestone powder mixing pump, wherein the limestone powder mixing pump has a tubular body combination structure, and one end of the limestone powder mixing pump is provided with two inlets in a square crossing way; the vertical inlet is connected with the mud pit by a heavy mud valve, a mud supply pipeline and a sand pump, and the horizontal inlet is connected with the limestone powder tank by a powder inlet valve and a limestone powder pipeline; the other end of the limestone powder mixing pump is connected with the mud pit by a mixing pipeline; the limestone powder tank is connected with the air compressor by an air inlet pipeline and an air source valve. The mud weighting technology comprises the steps of (1) basic mud circulation, namely enabling basic mud in the mud pit to carry out self-circulation by the sand pump, the limestone powder mixing pump and the mud pipeline; (2) mud weighting, namely gasifying limestone powder in the limestone powder tank by the air compressor, enabling the gasified limestone powder to flow into the limestone powder mixing pump, mixing the gasified limestone powder and the basic mud for weighting, and then enabling heavy mud to flow into the mud pit.

Description

Technical field: [0001] The invention relates to a mud weighting process and a special device, and belongs to the technical field of oil exploration and development drilling mud weighting technology. Background technique: [0002] In order to explore and develop oil and gas reservoirs in deep formations, the drilling depth has increased year by year, and more and more complex formations with high pressure and multi-pressure systems have been drilled, and the application range of high-density mud has become wider and wider. At present, there are three traditional production methods for high-density mud. One is to manually pour the bagged stone powder into the mixing funnel for mud weighting. The second is to add the packed stone powder to the mixing funnel by a crane. The way of mud weighting into the mixing funnel or mud pit. These three methods of aggravating the mud all have stone powder in contact with the ambient air, resulting in large stone powder dust in the air, the...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a special device for mud weighting in view of the disadvantages of dust pollution in the existing mu

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