Mixed slurry obtaining device and using method thereof

Abstract

The invention discloses a mixed slurry obtaining device and a using method thereof. The device comprises a tool body, a piston, a piston rod and a one-way valve, the upper end of the piston is fixedlyconnected with the lower end of the piston rod, and three cavities axially communicating are formed in the tool body from top to bottom in sequence, wherein the three cavities are an oil pipe connecting cavity, a piston rod sealing cavity and a piston sealing cavity correspondingly; and the piston is installed in the piston sealing cavity, the piston rod is arranged in the piston rod sealing cavity in a penetrating mode, the tool body is further provided with a radial channel, the radial channel communicates with the lower half section of the piston rod sealing cavity, the inner diameter of the lower half section of the piston rod sealing cavity is larger than the outer diameter of the piston rod, and the one-way valve is installed in the radial channel. A liquid taking tool can be accurately lowered to the designated depth, a mixed slurry fluid sample in a casing at the designated depth is effectively extracted, mixed slurry components in a cleaning area in the casing are analyzed, and support is provided for effectively solving the problem of waste well treatment.

Description

technical field [0001] The invention relates to the technical field of oil exploitation, in particular to a mud mixing acquisition device and a method for using the same. Background technique [0002] As the production of the Shengli Oil Production Plant enters the middle and late stages of the oilfield, problems such as production decline, water content of the produced fluid, and the number of abandoned oil wells have become increasingly prominent, seriously affecting the normal production and operation of the oil production plant. There is a prominent problem. Due to the age, the data of some wells are lost, the downhole string and cementing data are missing, the abandoned wells have been closed for a long time, and it is difficult to obtain the data of the downhole pressure system. Therefore, there is a need for a professional downhole fluid sample acquisition tool and method. [0003] Application number: 201720760418.1 discloses an oil sample sampling device, including ...

AI Technical Summary

Problems solved by technology

The utility model is designed and manufactured according to the principle of Venturi. When the slurry pumping pipe pumps the mud containing drill cuttings, a negative pressure is generated at the confluence of the Y-shaped structure, and the mud containing drill cuttings with gravel and small pebbles is combined with the high-speed pumping pump. The jets are mixed at the confluence and discharged to the designated position through the discharge end, which solves the problem of frequent damage to the blades by gravel and small pebbles when the sand pump or mud pump is used to directly transfer the mud containing drill cuttings in the prior art, which leads to the service life of the equipment Short, causing serious economic losses to the enterprise

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