US 11,946,327 B2
Automatic rheological parameter measuring system and use method for flowing drilling fluid with high temperature and high-pressure
FeiFei Zhang, Wuhan (CN); Tao Peng, Wuhan (CN); YueZhi Wang, Wuhan (CN); YiDi Wang, Wuhan (CN); He Liu, Wuhan (CN); Zhong Cheng, Wuhan (CN); YiBing Yu, Wuhan (CN); and Kai Wei, Wuhan (CN)
Assigned to YANGTZE UNIVERSITY, Wuhan (CN)
Filed by YANGTZE UNIVERSITY, Wuhan (CN)
Filed on Jun. 24, 2021, as Appl. No. 17/357,136.
Claims priority of application No. 202011024517.6 (CN), filed on Sep. 25, 2020.
Prior Publication US 2022/0098942 A1, Mar. 31, 2022
Int. Cl. G01N 11/00 (2006.01); E21B 21/08 (2006.01); G01N 11/02 (2006.01)
CPC E21B 21/08 (2013.01) [G01N 11/00 (2013.01); G01N 11/02 (2013.01); E21B 2200/20 (2020.05); G01N 2011/006 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An automatic measuring method for drilling fluid parameter measurement, comprising:
providing an automatic measuring system for drilling fluid parameter measurement, comprising: a mud container, a heat exchanger, a plunger pump, a flow test device and a control module, wherein:
the mud container, the heat exchanger, and the plunger pump are connected in turn with pipeline, the heat exchanger is located below the mud container and configured to receive test drilling fluid from the mud container and heat the test drilling fluid to simulate preset conditions;
the mud container is configured for a test drilling fluid preparation and a tested samples collection with a liquid inlet and an outlet respectively;
the mud container comprises a heat jacket arranged on an outer surface of the mud container and mainly configured to keep the test drilling fluid in the mud container warm by heating;
the plunger pump is configured to pump the test drilling fluid to the flow test device;
the flow test device is configured to simulate flowing states of drilling fluid in borehole annulus and drilling string, and also measure a pressure and a flow rate of drilling fluid in the flow test device;
the control module is configured to obtain rheological parameters and a best rheological mode of the drilling fluid in the borehole annulus and the drilling string based on the pressure and the flow rate;
wherein the system further comprises a check valve, a first back-pressure control valve, a second back-pressure control valve, and a flow meter; the check valve is arranged in an inlet of the flow test device to prevent backflow of the drilling fluid; the first back pressure control valve is arranged between the mud container and the plunger pump, and the second back pressure control valve is arranged between the mud container and the flow test device; the first and second back pressure control valves are configured for throttling; the flow meter is arranged between the check valve and the flow test device to monitor the flow rate of the drilling fluid through the test device;
simulating the flow state of drilling fluid in annulus or conventional pipeline under actual working conditions, comprising:
closing the check valve and second back pressure control valve and opening the first back pressure control valve, and injecting the drilling fluid into the mud container after receiving a flow signal from the control module;
when physical conditions of the drilling fluid in the measuring system reaches certain condition, opening the check valve and the second back pressure valve and closing the first back pressure valve, thereby the plunger pump, the mud container, the heat exchanger, and the flow test device forming mud circulation loop;
real-time monitoring the pressure and the flow rate of drilling fluid in the mud circulation loop by the flow test device; and
based on the pressure and the flow rate, obtaining the best rheological model and the associated rheological parameters.