CN202157769U - Pressurized online measuring device for density of drilling fluid - Google Patents

Abstract

A pressurized online measuring device for the density of a drilling fluid is disclosed, belonging to a novel measuring device for the density of a drilling fluid, particularly aiming at a continuous and online measurement for the density of a drilling fluid under different pressures. The pressurized online measuring device for the density of a drilling fluid comprises a booster pump, a Coriolis mass flowmeter, a pressure gage and a pressure adjusting valve, wherein the booster pump, the Coriolis mass flowmeter and the pressure adjusting valve are orderly connected via pipelines; and the pressure gage is installed in front of the pressure adjusting valve. The pressurized online measuring device for the density of a drilling fluid disclosed by the utility model has the advantage that an automatic online measurement for the density of a drilling fluid under different pressures can be realized.

Description

An on-line measuring device for drilling fluid density pressurization

technical field

The utility model belongs to a novel drilling fluid density measuring device, in particular aimed at the continuous on-line measurement of the drilling fluid density under different pressures. the

Background technique

In the process of oil drilling, the measurement of drilling fluid density is a very important work. Real-time and accurate measurement of drilling fluid density is particularly important for precise drilling construction under special geological conditions and to prevent well kicks, lost circulation and other downhole complex situations. the

Based on the investigation of current drilling fluid density measuring instruments, according to their different working principles, they can be mainly divided into: differential pressure type, vibration type, etc. The currently used density measuring devices have the following deficiencies: 1. When the differential pressure density sensor has a large pressure acting on it, the central diaphragm is deformed. After the pressure is removed, measurement errors are generated due to the inherent hysteresis of the metal. When the temperature changes greatly, errors will be caused by the influence of the ambient temperature, which needs to be checked irregularly, and the online measurement of the drilling fluid density under different pressures cannot be realized. 2. The vibrating density sensor can only measure the drilling fluid density under normal pressure, and cannot realize the online measurement of the drilling fluid density under different pressures. the

At present, with the improvement of the automation degree of oil drilling engineering, the automatic monitoring technology of drilling fluid performance has been paid more and more attention, especially the demand for on-line measurement technology of drilling fluid density is more urgent. The utility model is designed to solve the problem that the current conventional drilling fluid density measuring device cannot realize the continuous measurement of the drilling fluid density or the measurement of the drilling fluid density under different pressures. The utility model provides an on-line measuring device for drilling fluid density pressurization. It solves the deficiency of the commonly used drilling fluid density measuring device at present, thereby realizing the pressurized on-line measurement of the drilling fluid density. the

Contents of the invention

The current conventional drilling fluid density measuring devices either cannot realize the continuous measurement of the drilling fluid density, or cannot realize the measurement of the drilling fluid density under different pressures. The purpose of the utility model is to provide an on-line measuring device for drilling density pressurization. the

The utility model is realized in this way. It is composed of a booster pump, a Coriolis force mass flowmeter, a pressure gauge and a pressure regulating valve. Install a pressure gauge before the pressure valve. The booster pump is a plunger pump, screw pump or centrifugal pump with more than two cylinders. A manometer is a pressure gauge or pressure sensor. the

When the utility model measures the density of the drilling fluid, the drilling fluid is pumped into the Coriolis force mass flowmeter through the booster pump, and then passes through the pressure gauge and the pressure regulating valve. By adjusting the pressure regulating valve, different pressures can be generated and measured. Corresponding to the drilling fluid density under pressure, the pressurized online measurement of the drilling density can be realized. the

The utility model has the advantages that the variation rule of the drilling fluid density under different pressures can be studied through the device. Through data acquisition and processing, automatic measurement can be realized, which improves the accuracy of drilling fluid density measurement and reduces errors. the

Description of drawings

Fig. 1 is a schematic diagram of an online measuring device for drilling fluid density under pressure. the

In the figure, 1. Booster pump 2. Coriolis force mass flow meter 3. Pressure gauge 4. Pressure regulating valve

Detailed ways

Now further describe the utility model in conjunction with the accompanying drawings:

Fig. 1 is a diagram of an on-line measuring device for drilling fluid density pressurization implemented according to the present invention. When adopting the utility model to carry out on-line measurement of drilling fluid density pressurization, the booster pump 1, the Coriolis force mass flow meter 2, the pressure gauge 3 and the pressure regulating valve 4 are connected in series in sequence. The drilling fluid is sent to the Coriolis force mass flowmeter 2 by the pressure regulating pump 1, the Coriolis force mass flowmeter 2 can measure the drilling fluid density in the pipeline, and then flows through the pressure gauge 3, which is used to measure the pipeline The pressure of the drilling fluid flows out through the pressure regulating valve 4, and the pressure regulating valve 4 is used to adjust the drilling fluid to produce different pressures. During the specific measurement of the device, the drilling fluid is pumped into the Coriolis mass flowmeter 2 by the booster pump 1, and flows out through the pressure gauge 3 and the pressure regulating valve 4. Different pressures can be generated by adjusting the pressure regulating valve, and the pressure value can be determined by the pressure Meter detection, and the drilling fluid density under the corresponding pressure can be measured by the Coriolis force flowmeter. Therefore, through this online pressurization device, the pressurized online measurement of the drilling fluid density can be realized. the

The solutions and effects of the present invention will be further described below through specific examples, but it can not be considered that the present invention is only limited to these examples. the

Example 1

The booster pump adopts the miniature screw pump of Shanghai Zhongcheng Pump Industry Co., Ltd., the Coriolis force flowmeter adopts the KLB-CMFI mass flowmeter produced by Beijing Keliboao, and the pressure gauge adopts the CONST-273 intelligent digital meter produced by Beijing Const Instrument Co., Ltd. The pressure gauge and booster valve adopt the JX-150 booster valve produced by Shanghai Daipu. The drilling fluid is pumped into the KLB-CMFI mass flowmeter through the screw pump, and different pressures are generated by adjusting the JX-150 (pressure regulating valve), and the pressure value can be measured by CONST-273 (pressure gauge), and the corresponding pressure The drilling fluid density can be measured by KLB-CMFI (Coriolis flowmeter). After 10 days of continuous measurement, the readings are still accurate and reliable. Therefore, this online pressurizing device can realize pressurized online measurement of drilling fluid density. the

Example 2

The booster pump adopts the 2J-JX plunger metering pump of Hangzhou Zhijiang Pump Industry Co., Ltd., the Coriolis flowmeter adopts the LK-015-150 mass flowmeter produced by Shanghai Zhonglong Industrial Co., Ltd., and the pressure gauge adopts Shanghai Hongyu Instrument The company's DYS-1 digital pressure gauge and booster valve adopt ZY-1 booster valve produced by Shanghai Kuangxin Machinery Company. The drilling fluid is pumped into the LK-015-150 mass flowmeter through the 2J-JX plunger pump. By adjusting ZY-1 (pressure regulating valve), different pressures are generated. The pressure value can be determined by DYS-1 (pressure gauge) Metering, and the drilling fluid density under the corresponding pressure can be measured by LK-015-150 (Coriolis flowmeter). After 20 days of continuous measurement, the readings are still accurate and reliable. Therefore, this online pressurizing device can realize pressurized online measurement of drilling fluid density. the

Claims (3)

1. A drilling fluid density pressurization online measuring device is characterized in that: it is made up of a booster pump (1), a Coriolis mass flowmeter (2), a pressure gauge (3), and a pressure regulating valve (4). The pipeline connects the booster pump (1), the Coriolis force mass flowmeter (2), and the pressure regulating valve (4) in sequence, and the pressure gauge (3) is installed before the pressure regulating valve (4). 2. A drilling fluid density pressurization online measuring device according to claim 1, characterized in that: the booster pump (1) is a plunger pump, a screw pump or a centrifugal pump with more than two cylinders. 3. A drilling fluid density pressurization online measuring device according to claim 1, characterized in that: the pressure gauge (3) is a pressure gauge or a pressure sensor. the

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