Test device for simulating deep high-ground-stress stratum drilling
A technology of high ground stress and test equipment, applied in the direction of drill bits, drilling equipment, earthwork drilling and production, etc., can solve the problems of few developmental characteristics, lack of indoor test equipment for simulated drilling engineering, etc.
Pending Publication Date: 2021-08-06
CENT SOUTH UNIV
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Problems solved by technology
The drilling process is a process in which the stress state of the surrounding rock on the wellbore wall changes suddenly. At present, there are few studies on the real deep drilling dynamic process. There are not many changes in the development characteristics of bit breaking and cutting, and there is a lack of corresponding indoor test equipment for simulated drilling engineering
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[0026] specific implementation plan
[0027] In order to clarify the purpose, technical solutions and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and implementation examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] The present invention proposes a test system for simulating the drilling process in deep formations, the required devices and specific structures are as follows figure 1 and figure 2 As shown, it includes drilling pressure control terminal 1, hydraulic press 2, rubber pad 3, slider 4, drilling rig control terminal 5, drilling fluid steel ring casing 6, electric drilling rig 7, drill bit and drill pipe 8 (drill bit 15, drill pipe 16 ), slide rail 9, reaction force frame 10, high-definition camera 11, acoustic emission monitoring system 12, wa...
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The invention discloses a test device for simulating deep high-ground-stress stratum drilling, and belongs to the technical field of deep drilling engineering. The test system provided by the invention can realize deep stratum drilling test simulation in different high stress states, can simulate coring drilling and crushing drilling in a deep high-stress stratum, can realize real-time control of bit pressure and drill bit rotating speed in a drilling process, can realize real-time monitoring of drilling speed and drilling footage, can realize real-time monitoring of crack development of surrounding rock of a well wall, and is used for carrying out test simulation on the drilling process of the deep high-ground-stress stratum. The device is simple in test method and low in operation difficulty. The device is suitable for research on dynamic drilling processes of various high-crustal-stress rock stratums.
Description
technical field [0001] The invention belongs to the technical field of deep drilling engineering, and is a test system for simulating the drilling process of deep formations, in particular to a simulation equipment for deep formation drilling tests under different high stress states. Background technique [0002] The mining and development of deep geothermal resources such as hot dry rocks is inseparable from drilling engineering, and high temperature and high pressure are significant environmental characteristics of deep formations. The temperature of hot dry rock with development value is not lower than 200°C, but the depth of hot dry rock formation at this temperature is often more than 3000m, and the ground stress and vertical self-gravity stress of the formation generally exceed 50MPa. Hard and brittle granite is a typical dry hot rock. A large number of high-temperature and stress-strain tests on granite have proved that the mechanical strength and physical and mechani...
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Login to View More IPC IPC(8): E21B47/00E21B47/002E21B47/14E21B7/00E21B10/08E21B10/50E21B10/62E21B21/00
CPCE21B47/00E21B47/14E21B7/00E21B21/00E21B10/08E21B10/50E21B10/62
Inventor 王李昌肖敏杰隆威孙平贺刘希灵莫天宇王璐
Owner CENT SOUTH UNIV