US 12,071,849 B2
Device and method for simulating gas intrusion and bullheading in wellbore under different inclinations
Bangtang Yin, Dongying (CN); Tianbao Ding, Dongying (CN); Baojiang Sun, Dongying (CN); Zhiyuan Wang, Dongying (CN); Yonghai Gao, Dongying (CN); Hao Li, Dongying (CN); Xiaohui Sun, Dongying (CN); and Xuerui Wang, Dongying (CN)
Assigned to CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Dongying (CN)
Filed by CHINA UNIVERSITY OF PETROLEUM (EAST CHINA), Dongying (CN)
Filed on Mar. 28, 2024, as Appl. No. 18/620,194.
Claims priority of application No. 202310535492.3 (CN), filed on May 12, 2023.
Prior Publication US 2024/0240557 A1, Jul. 18, 2024
Int. Cl. E21B 49/00 (2006.01); E21B 41/00 (2006.01); G06F 30/20 (2020.01)
CPC E21B 49/008 (2013.01) [E21B 41/00 (2013.01); E21B 2200/20 (2020.05); G01V 2210/64 (2013.01); G06F 30/20 (2020.01)] 8 Claims
OG exemplary drawing
 
1. A device for simulating gas intrusion and bullheading in a wellbore under different inclinations, comprising:
a formation unit;
an air compressor;
a bubble generator;
an air inlet needle;
a lower plug;
a back pressure valve;
a liquid storage tank;
a screw pump;
a three-way valve;
an upper plug;
one or more inlets;
a light-emitting diode (LED) light source;
a flange;
an inner pipe;
a wellbore outer pipe;
a metal bracket; and
a first angle adjusting mechanism;
wherein the inner pipe and the LED light source are provided in an inner cavity of the wellbore outer pipe; the upper plug is provided at an upper end of the wellbore outer pipe; the lower plug is provided at a lower end of the wellbore outer pipe; the flange is provided at a middle of the wellbore outer pipe, and is connected to the metal bracket through the first angle adjusting mechanism; an outer wall of the wellbore outer pipe is provided with the one or more inlets; the bubble generator is arranged outside the lower plug; an output end of the bubble generator passes through the lower plug via the air inlet needle to extend into the inner cavity of the wellbore outer pipe; an input end of the bubble generator is connected to the air compressor; a lower outlet of the wellbore outer pipe is connected to an inlet of the formation unit through a first pipeline and the back pressure valve; an outlet of the formation unit is connected to the liquid storage tank through a second pipeline; a lower end of the liquid storage tank is connected to the upper end of the wellbore outer pipe through a third pipeline, the screw pump and the three-way valve; and a camera is arranged at an outer side of the wellbore outer pipe, and is connected to a computer through a wire;
an outside of each of the one or more inlets is connected to a simulated relief well; the simulated relief well comprises a second angle adjusting mechanism, a vertical section, a first connector and a build-up section; the vertical section is connected to a first end of the build-up section through the first connector; a second end of the build-up section is connected to a corresponding one of the one or more inlets; and an outer wall of the vertical section is connected to the second angle adjusting mechanism; and
the formation unit comprises a plurality of simulated formation fractures and two simulation sleeves; the plurality of simulated formation fractures are provided between the two simulation sleeves; an adjusting rod is provided in each of the two simulation sleeves; a lower end of the adjusting rod is provided with a piston; an upper end of the adjusting rod is provided with a knob; and the piston is configured to be moved up and down to control the number of connected simulated formation fractures among the plurality of simulated formation fractures.