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A true three-axis jet rock breaking device with high-speed magnetic rotation

A rock-breaking device and true three-axis technology, which is applied to the driving device for drilling in the borehole, drilling with liquid/gas jet, earthwork drilling and mining, etc., can solve the problem of high-speed rotation that cannot truly simulate the force of the bottom rock And other issues

Active Publication Date: 2020-10-16
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a high-speed magnetic rotating true triaxial jet rock-breaking device, which can simulate different X / Y horizontal stresses and Z-direction hydrostatic column pressures, and load the true triaxial confining pressure It is organically combined with jet rock breaking, and the center pipe can rotate continuously at high speed to solve the problem that the existing jet rock breaking experimental device cannot truly simulate the stress state of the rock at the bottom of the well during drilling and the downhole high-speed rotation of compound drilling tools such as screw and turbine. situation problem

Method used

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  • A true three-axis jet rock breaking device with high-speed magnetic rotation
  • A true three-axis jet rock breaking device with high-speed magnetic rotation
  • A true three-axis jet rock breaking device with high-speed magnetic rotation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Open the side cover 11 of the confining autoclave, put the artificial rock core 13 of a certain physical parameter into the core holder 14 in the mold cavity 12, fix the side cover 11, start the high-pressure pump 19, the servo motor 7 and the hydraulic cylinder 17, set Experimental parameters, after the nozzle 4 forms a stable jet, set the pressure of the electromagnetic pressure relief valve 18 to 10MPa, a hydrostatic column pressure of 10MPa is formed in the cavity 12 of the confining autoclave, and set the oil pressure of the hydraulic cylinder 17 in the X direction to 9MPa, Y The oil pressure of the direction hydraulic cylinder 17 is set to 8.5MPa. Considering the 10MPa hydrostatic column pressure formed in the mold cavity 12 of the confining autoclave, the confining pressure in the X direction is 19MPa, and the confining pressure in the Y direction is 18.5MPa; 0 to 150 mm, the distance between the outlet of the nozzle 4 and the upper end surface of the artificial c...

Embodiment 2

[0058] According to the operation steps of Example 1, adjust the electromagnetic pressure relief valve 18, increase the hydrostatic column pressure in the Z direction from 10MPa to 15MPa, increase the oil pressure in the X horizontal direction from 9MPa to 18MPa, and increase the oil pressure in the Y horizontal direction from 8.5MPa to 17MPa Finally, considering the hydrostatic column pressure of 15MPa, the X-direction confining pressure is 33MPa, and the Y-direction confining pressure is 32MPa. Repeat the operation steps of Example 1. After the experiment is completed, measure the rock-breaking volume and depth of the artificial core 13 to obtain the confining pressure. The critical velocity of jet rock breaking under the pressure condition.

[0059] In this embodiment, a high-speed magnetic rotating true triaxial jet rock-breaking device uses a high-pressure pump 19 to transport the experimental fluid to the injection head 2 and the central pipe 3, and then sprays it into th...

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Abstract

The invention discloses a high-speed magnetic rotation type true three-axis jet rock breaking device. The high-speed magnetic rotation type true three-axis jet rock breaking device mainly consists ofa surrounding pressure kettle pressurizing system, a strong magnetic center pipe control system and a high-pressure pump; all measuring and control instruments can realize the remote control and recording functions. The high-speed magnetic rotation type true three-axis jet rock breaking device has the advantages that the ground stress along different X / Y horizontal directions and the hydrostatic fluid column pressure along Z direction can be simulated; the true three-axis surrounding pressure loading and the jet rock breaking can be organically combined together, and a center pipe can continuously rotate at high speed, so as to solve the problem of failure in true simulation of stress conditions of rocks at the bottom of a well and high-speed rotation conditions of screw rods, worms and other composite drilling tools under the well in the drilling process by the existing jet rock breaking experiment device; the rule of influence on the jet rock breaking efficiency by the ground stressalong the X / Y directions and the hydrostatic fluid column pressure in a well cylinder can be analyzed, so as to provide an indoor study method for the definition of change rule of threshold pressure of jet rock breaking for different physical rock cores under surrounding pressure conditions and the application of high-pressure spraying drilling technology.

Description

technical field [0001] The invention relates to the technical field of oil and gas, in particular to a high-speed magnetically rotating true triaxial jet rock-breaking device. Background technique [0002] As the hydraulic energy transmitted to the bottom of the well is greatly increased, the hydraulic energy at the bottom of the well is sometimes not limited to purifying the bottom of the well. In the upper well section and the soft-medium hard formation, when the pressure of the jet exceeds the strength of the rock, it will play a role. A large number of facts in oil drilling projects at home and abroad show that under the same formation, equipment and process parameters, the speed of hydraulic jet drilling is more than double that of ordinary drilling, and with the increase of pump pressure and water power The effect of the increase is more and more obvious. However, blindly increasing the water power will lead to excessively high pump pressure, increased equipment energ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B4/02E21B7/18
CPCE21B4/02E21B7/18
Inventor 李帮民侯树刚席宝滨杨玄兰凯彭彬
Owner CHINA PETROCHEMICAL CORP