A fully automatic degasser

Abstract

The invention discloses a full-automatic degassing machine, comprising a degassing barrel (2), a slurry inlet (1), a slurry outlet (6), a stirring and crushing device (3) and a motor. The invention is characterized in that the full-automatic degassing machine also comprises an air cavity (7), an air inlet (8), an oil gas suction inlet (9), a lifting support sliding rod (21), a guide rail locatingplate (12), a double spindle lifting cylinder (24) and a brake friction plate (30), and a first ultrasonic wave probe (15), a second ultrasonic wave probe (16), a slurry blocking detection device (25) and an automatic drainer (26), and the double spindle lifting cylinder (24), a braking cylinder (28), the slurry blocking detection device (25), the motor (13), the first ultrasonic wave probe (15) and the second ultrasonic wave probe (16) are all connected with an electric control device (31). The full-automatic degassing machine disclosed by the invention has a reasonable design, a simple structure, economy and practicability, convenience in operation, good degassing efficiency, high efficiency, long service life and simplicity in mounting and dismounting.

Description

Technical field: [0001] The invention relates to a fully automatic degasser, which is a fully automatic lift-type electric degasser for petroleum geological comprehensive mud logging, and belongs to the field of petroleum geological mud logging technical equipment. Background technique: [0002] During oil field drilling, oil and gas analysis should be carried out on the rock formations drilled underground, mainly for oil and gas analysis of rock formations at different depths during the drilling process. Generally, it is placed in a square drilling fluid mud pool with an inlet (low position) and an outlet (high position), and the backflow is stored. The degasser is placed on it, and the drilling fluid returns with the drilling fluid during the oil field drilling process. The mud is crushed online, and the oil and gas contained in it are released and sent to the instrument room through the gas pipe for analysis. The existing oil and gas degasser has the following disadvanta...

AI Technical Summary

Problems solved by technology

[0003] 1. The degassing effect is not ideal: the drilling fluid is driven into the ground with the drill bit by a high-pressure pump, so the mud debris returned with the drilling fluid has a fast flow rate and a large amount. The outlet setting is unreasonable, the mud entering and leaving the degassing barrel is less, and it is not synchronized with the drilling fluid flow rate, which makes it impossible to scientifically and accurately reflect the actual situation of oil and gas in rock formations at different depths when drilling

[0004] 2. The lifting mechanism of the degasser is unreasonable: due to the change of single and double pressure pumps and other factors in the formation during the drilling process, the mud height in the liquid pool is often changed and the speed is very fast. It can rise to a high point or drop to a low point in a few seconds. point

The current degasser is basically based on the change of the liquid level. The manual screw drives the stirring motor and the degassing barrel is lifted. When the liquid level changes, it takes at least a few minutes for the staff to arrive at the scene and manually lift it. It is very easy for the motor to be flooded at times, resulting in short-circuit and burning, and the oil and gas collection pipes will suck in mud many times a day and cause blockage, etc., which will affect oil and gas collection.

In addition, some motors are designed to drive the degasser up and down through the gear and screw. The biggest disadvantages are: first, the lifting speed is slow; second, the degasser is too heavy. The clutch controls the lifting, and the cost of solving the explosion-proof problem is too high), and most of the on-site workers are women. Sometimes it only takes 10 days to drill a well, and the burden of disassembly, transfer, and installation is heavy. The danger of entering the liquid pool containing strong alkali; the third is that the operating environment is harsh, and the sealing, lubrication and daily maintenance of the screw and gear are very high, and the hot gas containing acid and alkali and splashing mud can easily cause corrosion and blockage , affecting the normal operation and service life of the machine

[0005] 3. The liquid level position detection used by the existing degasser basically adopts the method of spherical float. Because the drilling fluid and mud are very oily and very viscous, the mud splash at the inlet of the liquid pool is large, and the guide rail of the float lifting rod will often be blocked, The float cannot be raised and lowered smoothly, causing the machine to lose its lifting function

In addition, too much mud hanging on the float will easily lead to inaccurate lifting and moving.

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