Thread-control high-pressure environment liquid sampler

Abstract

The present invention discloses a thread-control high-pressure environment liquid sampler. The thread-control high-pressure environment liquid sampler of the invention comprises the following components: a sealed barrel which is composed of a main chamber and a sampling chamber (1) communicated with the sampling chamber (1), a piston (2), a push rod (3) and a sampling valve (4). The piston is positioned in the main chamber and furthermore the outer margin of the piston is matched with the inner chamber wall of main chamber for dividing the main chamber into a liquid inlet chamber (5) and a cushion chamber (6). The base of main chamber far from the sampling chamber is provided with an opening. One end of the push rod is connected with the piston, and the other end extends out from the main chamber through an opening and is jointed with the main chamber through thread joint. The sampling chamber is installed with a sampling opening controlled by the sampling valve. The volume of liquid inlet chamber is increased through the rotation of push rod, and the polymer liquid enters through the self pressure. The flow velocity of high-pressure liquid entering into the liquid inlet chamber can be controlled through the rotation speed of push rod for reducing the shearing of high pressure to the viscosity of liquid. The volume of liquid entering the sampler can be controlled through controlling the screwing-out length of push rod. The thread-control high-pressure environment liquid sampler of the invention has the advantages of simple structure and convenient sampling. The shearing caused by the entering of liquid into the sampler in the high-pressure environment can be effectively prevented and the liquid entering into the sampler can be accurately measured.

Description

technical field [0001] The invention relates to a thread control type high-pressure environment liquid sampler. Background technique [0002] As a mature tertiary oil recovery technology, polymer flooding has been applied industrially in many oil fields, and has achieved good results and economic benefits. In field application, the dosing quality of polymer solution is an important factor affecting the displacement effect. Evaluation of polymer quality by wellhead sampling is an important quality control tool in the field. Sampling in high pressure tube pumps is very difficult due to the high pressures involved in injecting the polymer. The traditional sampler is very simple, just a cylindrical container. When the main valve is opened, the polymer solution fills the sampler instantly under the action of pressure, resulting in the shear degradation of the polymer solution viscosity, which cannot truly reflect the polymer The injection quality makes it impossible to effecti...

AI Technical Summary

Problems solved by technology

Sampling in high pressure tube pumps is difficult due to high pressure during polymer injection

The traditional sampler is very simple, just a cylindrical container. When the main valve is opened, the polymer solution fills the sampler instantly under the action of pressure, resulting in the shear degradation of the polymer solution viscosity, which cannot truly reflect the polymer Dispensing quality, making it impossible to effectively test and control the quality of the polymer prior to injection into the formation

Images