Degasser and tank body and stirring body thereof

Abstract

The invention discloses a degasser and a tank body and a stirring body thereof, relating to a device for on-line degassing of slurry extracted from oil exploration drilling. The degasser is provided with the tank body for accommodating the slurry and the stirring body; the stirring body is used for stretching into the tank body to stir the slurry; the tank body is provided with a slurry inlet anda slurry outlet, wherein the tank body is also provided with a seat body; one end of the seat body connected with an installation plate is provided with a gas collecting chamber; the tank body has anairtight structure; and the airtight structure is composed of a slurry outlet structure and the slurry inlet structure and an induced draught exhaust port. The stirring body is composed of a stirringbody central shaft and a plurality of stirring rods; the stirring body central shaft is connected with a transmission shaft; the stirring rods are fixedly arranged on the stirring body central shaft at a preset interval, and the adjacent stirring rods are vertical to each other. An inner chamber of the tank body is arranged into a stepwise stirring chamber, and the stepwise stirring chamber is partitioned into graded chambers by a slurry blocking assembly arranged in the tank body; and the slurry blocking assembly consists of a first slurry blocking piece and a second slurry blocking piece.

Description

technical field [0001] The invention belongs to equipment for comprehensive mud logging and gas logging, and relates to a device for on-line degassing of mud proposed in oil exploration and drilling. Background technique [0002] The degassing device is an important part of the comprehensive mud logging and gas logging equipment. It shoulders the important task of whether the sample gas can better represent the real gas content of the formation, and directly affects the accuracy of oil and gas field evaluation. [0003] The industry's research on its improvement has never stopped. [0004] For example, the published Chinese patent "200410059804.5 A system for removing gas from mud and analyzing gas contained in mud" describes a physical and chemical analysis device for gas extracted online from mud proposed in oil exploration drilling, mentioning Degassing device. [0005] The industry generally believes that the degasser has generally experienced the first generation of d...

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Problems solved by technology

[0005] The industry generally believes that the degasser has generally experienced the first generation of degasser: that is, a square metal box is processed into a concave shape at the bottom, and the middle lead-out pipeline is connected to the suction pump. This device floats on the mud page and generally has no power source. , which belongs to a float type degasser, and its degassing efficiency is low

The second-generation degasser is an electric degasser. The motor drives the stirring rod to stir in the degassing barrel. The purpose is to break up the mud and separate the gas in the mud, and then pump the gas to the mud logging room through the sample gas pump. , the degassing efficiency has been improved, but due to the great influence of the change of the liquid level of the mud tank, the mud flow is unstable, and the slurry inlet of the degassing device does not have a good flow limiting measure, so that the mud is easily pumped to the recorder. The well room caused damage to the equipment. For this reason, it is often necessary to adjust the draft of the degasser by raising and lowering it, which affects the operating efficiency.

[0008] However, due to the structure of the known technology, the crushing degree of the mud is poor and unstable, and the mud easily forms a vortex in the stirring chamber, which directly affects the degassing efficiency; the existing degasser is not suitable for gas collection due to the structure. , or poor gas collection

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