Online density measurement instrument for constant-temperature duel-pressure vibration tube type drilling fluid and measurement method

A technology of drilling fluid density and dual pressure, which is applied in the direction of measuring devices, specific gravity measurement, instruments, etc., can solve the problems of unfavorable pressure management drilling construction and low accuracy, and achieve the effect of eliminating measurement errors and improving accuracy

Pending Publication Date: 2018-07-03
SINOPEC SSC +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to propose a constant-temperature dual-pressure drilling fluid density measurement device that has low accuracy in drilling fluid density measurement due to temperature changes and is not conducive to the construction of managed pressure drilling. Vibrating tube type drilling fluid density online measuring instrument and measurement method to improve the accuracy of measurement data and facilitate the calculation of real density of aerated drilling fluid under different temperature and pressure downhole

Method used

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  • Online density measurement instrument for constant-temperature duel-pressure vibration tube type drilling fluid and measurement method
  • Online density measurement instrument for constant-temperature duel-pressure vibration tube type drilling fluid and measurement method
  • Online density measurement instrument for constant-temperature duel-pressure vibration tube type drilling fluid and measurement method

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Embodiment 1

[0023] Embodiment 1. With reference to attached figure 1 , connect the inlet pipe of screw pump 1 to the drilling fluid container, screw pump 1 is connected in series with Coriolis mass flowmeter I2, back pressure valve I4, Coriolis mass flow meter II6, and back pressure valve II7 through pipelines, and the pressure The sensor I3 and the pressure sensor II5 are respectively connected in parallel on the upstream and downstream pipelines of the back pressure valve I4, and the Coriolis mass flowmeter I2 and the Coriolis mass flowmeter II6 are installed in the semiconductor constant temperature container 8, forming the The constant temperature dual pressure vibrating tube drilling fluid density online measuring instrument.

[0024] The present invention adopts the measuring method steps of the constant-temperature dual-pressure vibrating tube drilling fluid density on-line measuring instrument: ①The drilling fluid is pumped into the pipeline by the screw pump, and flows through th...

Embodiment 2

[0050] Embodiment 2. Adjust the temperature of the semiconductor constant temperature container to the temperature of the measured drilling fluid, continuously circulate the drilling fluid in the container at a certain flow rate, adjust the back pressure valve I4 and the back pressure valve II7, and make the two vibrating tube densitometers 2 and 6 pressures are P 1 and P 2 , measure the density value ρ of two vibrating tube densitometers 2 and 6 1 and ρ 2 ;according to P 1 ,P 2 , ρ 1 , ρ 2 and the instantaneous value of drilling fluid temperature T to calculate the solid-liquid phase density ρ of drilling fluid m The instantaneous value of :

[0051] And the gas-liquid volume ratio under the standard state:

[0052] Continuous determination of these P 1 ,P 2 , ρ 1 , ρ 2 Instantaneous value of T and T, real-time measurement and continuous recording of drilling fluid solid-liquid phase density and gas-liquid volume ratio change process under standard conditions,...

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Abstract

The invention discloses an online density measurement instrument for constant-temperature duel-pressure vibration tube type drilling fluid and a measurement method, relating to the measurement field of fluid density. A screw pump, a Coriolis mass flowmeter or a vibration tube density gauge I, a back pressure valve I, a Coriolis mass flowmeter or a vibration tube density gauge II and a back pressure valve II are sequentially connected through pipelines, a pressure sensor I and a pressure sensor II are respectively connected to pipelines on the front and rear sides of the back pressure valve I in parallel, and the two Coriolis mass flowmeters or the two vibration tube density gauges are mounted in a semiconductor constant-temperature container. The measurement method comprises the followingsteps: respectively measuring pressure momentary values of the Coriolis mass flowmeters or the vibration tube density gauges by virtue of the pressure sensors, and measuring the density momentary values at different pressures by virtue of the Coriolis mass flowmeters or the vibration tube density gauges; and calculating solid-liquid phase density and a momentary value of a standard gas-liquid ratio of the drilling fluid according to the measured values. The online density measurement instrument and the measurement method have the advantages of accurate data and high measurement speed and are suitable for the real-time online density measurement of the drilling fluid.

Description

technical field [0001] The invention belongs to the field of fluid density measurement, and in particular relates to a real-time on-line measurement device for gas-containing drilling fluid density and a measurement method based on the device, which is suitable for real-time on-line measurement of the density of aerated drilling fluid on site. Background technique [0002] 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. [0003] According to the principle, the density measurement of fluid mainly includes differential pressure type, buoyancy type, vibration type, weighing type and γ-ray type. Poor performance, affected by the thixotropy of drilling fluid, etc., the density measurement err...

Claims

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Application Information

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IPC IPC(8): G01N9/00
CPCG01N9/002G01N2009/006
Inventor 刘保双王忠杰马云谦罗云凤
Owner SINOPEC SSC
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