Horizontal directional drilling forward dynamic hole expansion construction simulation test device and experimental method

Abstract

The invention discloses a horizontal directional drilling forward power hole expansion construction simulation test device, which includes an experimental simulated soil body, the experimental simulated soil body includes an experimental soil box and a pressure loading system for adjusting the soil pressure in the experimental soil box, the pressure loading system is arranged above the experimental soil box, and the lower part of the pressure loading system is connected to the experimental soil box through a vertical loading piston, and the pressure loading system compresses the piston downward to change the soil pressure in the experimental soil box to achieve simulation conditions of different soil bodies, and also includes a drilling and back-pulling force system, a forward hole expansion drilling device, a mud circulation system, a terminal control and data processing system, and a pressure sensor and a humidity sensor arranged in the experimental soil box. The invention connects a mud motor at the rear end of the hole expander to restore the construction process of forward hole expansion to the maximum extent, and can obtain a series of construction control parameters such as mud ratio parameters, drill bit selection, drilling rig torque, back-pulling force, etc. in actual working conditions through the simulation device, thereby guiding actual engineering construction.

Description

Technical Field

[0001] The invention relates to the field of horizontal directional drilling construction, and in particular to a horizontal directional drilling forward power hole enlargement construction simulation test device and an experimental method thereof. Background Art

[0002] At present, the construction mainly adopts the reverse hole expansion by pulling back the drill rig, and the drill rig provides the drilling and pulling back force. The hole expansion torque is small, the hole expansion difference is small, the drilling efficiency is low, and the accident rate is high. At present, there is no complete forward hole expansion test device on the market, so it is impossible to obtain the corresponding construction parameters before construction to make full preparations before construction. Summary of the invention

[0003] The purpose of the present invention is to provide a horizontal directional drilling forward power hole expansion construction simulation test device and its experimental method in order to solve the above problems.

[0004] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: a horizontal directional drilling forward power expansion construction simulation test device, which includes an experimental simulated soil body, the experimental simulated soil body includes an experimental soil box and a pressure loading system for adjusting the soil pressure in the experimental soil box, the pressure loading system is arranged above the experimental soil box, and the lower part of the pressure loading system is connected to the experimental soil box through a vertical loading piston, and the pressure loading system compresses the piston downward to change the soil pressure in the experimental soil box to achieve simulation conditions of different soil bodies, and also includes a drilling and back-dragging power system, a forward expansion drilling device, a mud circulation system, a terminal control and data processing system, and a pressure sensor and a humidity sensor arranged in the experimental soil box;

[0005] The drilling and pulling back power system includes a power device, an anchor device and a front drill rod; the anchor device fixes the power device to one side of the experimental soil box by bolts; the power head of the power device is connected to the front drill rod, and the axis of the front drill rod coincides with the axis of the simulated soil body on a straight line;

[0006] The forward reaming drilling device comprises a reaming drill bit, a mud motor and a rear drill rod; the reaming drill bit is connected to the front drill rod, the drilling and back-pulling power system drags the front drill rod to drive the reaming drill bit to move forward, and the rear of the reaming drill bit is connected to the mud motor; the rear side of the mud motor is connected to the rear drill rod through a universal joint;

[0007] The mud circulation system comprises a mud pool, a mud pump and a mud filter; the mud in the mud pool is pumped out by the mud pump and flows into the front drill pipe through the mud pipe, the mud flows from the front drill pipe through the mud motor to provide power for the mud motor, the mud motor drives the reaming drill bit to rotate, and then flows into the rear drill pipe; the mud flows into the mud pipeline through the flange mud outlet pipe, and flows back to the mud pool through the mud filter, so as to realize the recycling of the mud;

[0008] A mud flange compass is also fixedly arranged at the connection between the experimental soil box and the rear drill rod. The mud flange compass is fixedly connected to the experimental soil box through flange bolts, and a mud outlet is arranged on the mud flange compass; one side of the rear drill rod is connected to the mud motor through a universal joint, and the other side passes through the mud flange compass and is fixed on the mud flange compass;

[0009] The terminal control and data processing system is connected to the drilling and retraction force system, pressure sensor, and humidity sensor through a data receiver. It is connected to the drilling and retraction force system to control the retraction force and torque and transmit the data to the terminal for recording and monitoring; it is connected to the pressure sensor and humidity sensor to obtain the real-time condition of the soil to achieve the soil standard required for the simulation, and record the soil pressure during the experiment.

[0010] Furthermore, the mud circulation system also includes a grouting system; the grouting system includes a mud flow meter and a mud valve, and the mud flow rate is controlled by the mud valve and the mud flow meter during the circulation of the mud; the mud flow meter and the mud valve are connected to the terminal control and data processing system through a data receiver.

[0011] In addition, the present invention also discloses an experimental method of a horizontal directional drilling forward power hole expansion construction simulation test device, which comprises the following steps:

[0012] S100, simulating a pilot hole in the experimental soil box, initializing the power of the drilling and back-pulling power system, and connecting the pressure sensor, humidity sensor, mud flow meter, mud valve, and the drilling and back-pulling power system to the terminal control and data processing system through the data receiver;

[0013] S200, setting mud configuration and optimization, mud motor parameters, initializing the grouting system through the mud flow meter and mud valve;

[0014] S300, start the power device to drill the pilot hole and perform forward power hole expansion simulation;

[0015] S400, records the parameters of mud flow, mud motor working parameters, pull-back force, soil pressure, humidity, and torque;

[0016] S500, changing one of the parameters of mud flow, pressure, mud motor working parameters, soil pressure, and humidity, and re-performing steps S200 to S400, and finally comparing to obtain the construction parameters.

[0017] In summary, the present invention has the following beneficial effects:

[0018] (1) In the experimental device of the present invention, a mud motor is connected to the rear end of the reamer to restore the construction process of forward reaming to the maximum extent;

[0019] (2) The experimental soil box uses a hydraulic loading system to achieve different soil pressures and humidity levels, which is closer to the soil conditions on site;

[0020] (3) The experimental simulation device can measure various parameters of forward hole expansion and provide a reference for on-site construction;

[0021] (4) During the experimental simulation, the possible construction conditions encountered during forward hole expansion can be observed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the simulation test device of the present invention;

[0023] Figure 2 It is a logic block diagram of the experimental method of the experimental device of the present invention. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0025] The present invention is described in more detail below with reference to the accompanying drawings, dimensions and specific simulation data;

[0026] Combination Figure 1 For further explanation: A horizontal directional drilling forward power expansion construction simulation test device, which includes an experimental simulated soil body, the experimental simulated soil body includes an experimental soil box 22 and a pressure loading system 20 for adjusting the pressure of the soil body 23 in the experimental soil box, the pressure loading system 20 is arranged above the experimental soil box, and the pressure loading system 20 is connected to the experimental soil box through a vertical loading piston 21 below the pressure loading system 20, and the pressure loading system 20 compresses the piston 21 downward to change the pressure of the soil in the experimental soil box 22 to achieve simulation conditions of different soil bodies 23, and also includes a drilling and back-dragging power system, a forward expansion drilling device, a mud circulation system, a terminal control and data processing system 18, and a pressure sensor 16 and a humidity sensor 17 arranged in the experimental soil box;

[0027] The drilling and back-pulling power system includes a power device 1, an anchor device 2 and a front drill rod 3; the anchor device 2 fixes the power device 1 to one side of the experimental soil box 22 by bolts; the power head of the power device 1 is connected to the front drill rod 3, and the axis of the front drill rod 3 coincides with the axis of the simulated soil body on a straight line; the anchor device 2 may include a bracket and a track (not shown in the figure), and the power device 1 includes a drive motor, a fixing bolt and a power head installed on the track. First, the bracket is fixed in a corresponding position by the fixing bolt to keep the whole system stable; the power head is connected to the front drill rod 3, and it is ensured that the axis of the drill rod coincides with the axis of the simulated soil body on a straight line, and the drive motor is turned on. Under the operation of the drive motor, the power head on the track is driven to move forward along the track direction to provide a back-pulling force for the forward hole expansion process, and at the same time, the power head drives the front drill rod to rotate to provide torque in the forward hole expansion process;

[0028] The forward reaming drilling device includes a reaming drill bit 4, a mud motor 5 and a rear drill rod 7; the reaming drill bit 4 is connected to the front drill rod 3, the drilling and back-pulling power system drags the front drill rod 3 to drive the reaming drill bit 4 to move forward, and the rear of the reaming drill bit 4 is connected to the mud motor 5; the rear side of the mud motor 5 is connected to the rear drill rod 7 through a universal joint 6;

[0029] The mud circulation system includes a mud pool 12, a mud pump 15, and a mud filter 11; the mud in the mud pool 12 is pumped out by the mud pump 15 and flows into the front drill pipe through the mud pipe, the mud flows from the front drill pipe 3 through the mud motor 5 to provide power for the mud motor 5, the mud motor 5 drives the reaming drill bit 4 to rotate, and then flows into the rear drill pipe 7; the mud flows into the mud pipeline through the flange mud outlet pipe 10, and flows back to the mud pool through the mud filter 11, so as to realize the recycling of the mud;

[0030] A mud flange compass 8 is also fixedly arranged at the connection between the experimental soil box 22 and the rear drill rod 7. The mud flange compass 8 is fixedly connected to the experimental soil box 22 through flange bolts 9, and a mud outlet pipe 10 is arranged on the mud flange compass 8; one side of the rear drill rod 7 is connected to the mud motor 5 through a universal joint 6, and the other side passes through the mud flange compass 8 and is fixed on the mud flange compass 8; the mud circulation system also includes a grouting system; the grouting system includes a mud flow meter 13 and a mud valve 14, and the flow rate of the mud is controlled by the mud valve 14 and the mud flow meter 13 during the circulation process of the mud; the mud flow meter 13 and the mud valve 14 are connected to the terminal control and data processing system 18 through a data receiver 19;

[0031] The terminal control and data processing system 18 is connected to the drilling and retracting force system, the pressure sensor 16, and the humidity sensor 17 through the data receiver 19. It is connected to the drilling and retracting force system to control the retracting force and torque and transmit the data to the terminal for recording and monitoring; it is connected to the pressure sensor 16 and the humidity sensor 17 to obtain the real-time condition of the soil to achieve the soil standard required for the simulation, and record the soil pressure during the experiment.

[0032] Combination Figure 2 To further illustrate: an experimental method of a horizontal directional drilling forward power hole expansion construction simulation test device includes the following steps:

[0033] S100, simulating a pilot hole in the experimental soil box, initializing the power of the drilling and back-pulling power system, and connecting the pressure sensor, humidity sensor, mud flow meter, mud valve, and the drilling and back-pulling power system to the terminal control and data processing system through the data receiver;

[0034] S200, setting mud configuration and optimization, mud motor parameters, initializing the grouting system through the mud flow meter and mud valve;

[0035] S300, start the power device to drill the pilot hole and perform forward power hole expansion simulation;

[0036] S400, records the parameters of mud flow, mud motor working parameters, pull-back force, soil pressure, humidity, and torque;

[0037] S500, changing one of the parameters of mud flow, pressure, mud motor working parameters, soil pressure, and humidity, and re-performing steps S200 to S400, and finally comparing to obtain the construction parameters.

[0038] In the experimental device of the present invention, a mud motor is connected to the rear end of the reamer to restore the construction process of forward reaming to the maximum extent; the experimental soil box achieves different soil pressures and humidity through a hydraulic loading system, which is closer to the soil conditions on site; the experimental simulation device can measure various parameters of forward reaming to provide a reference for on-site construction; during the experimental simulation process, the construction conditions that may be encountered in forward reaming can be observed.

[0039] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the description of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A test method using a horizontal directional drilling forward power expansion construction simulation test device, the test device includes an experimental simulated soil body, the experimental simulated soil body includes an experimental soil box and a pressure loading system for adjusting the soil pressure in the experimental soil box, the pressure loading system is arranged above the experimental soil box, and the lower part of the pressure loading system is connected to the experimental soil box through a vertical loading piston, and the pressure loading system compresses the piston downward to change the soil pressure in the experimental soil box to achieve simulation conditions of different soil bodies, characterized in that: It also includes a drilling and back-dragging power system, a forward reaming drilling device, a mud circulation system, a terminal control and data processing system, and a pressure sensor and a humidity sensor set in the experimental soil box; The drilling and pulling back power system includes a power device, an anchor device and a front drill rod; the anchor device fixes the power device to one side of the experimental soil box by bolts; the power head of the power device is connected to the front drill rod, and the axis of the front drill rod coincides with the axis of the simulated soil body on a straight line; The forward reaming drilling device comprises a reaming drill bit, a mud motor and a rear drill rod; the reaming drill bit is connected to the front drill rod, the drilling and back-pulling power system drags the front drill rod to drive the reaming drill bit to move forward, and the rear of the reaming drill bit is connected to the mud motor; the rear side of the mud motor is connected to the rear drill rod through a universal joint; The mud circulation system comprises a mud pool, a mud pump and a mud filter; the mud in the mud pool is pumped out by the mud pump and flows into the front drill pipe through the mud pipe, the mud flows from the front drill pipe through the mud motor to provide power for the mud motor, the mud motor drives the reaming drill bit to rotate, and then flows into the rear drill pipe; the mud flows into the mud pipeline through the flange mud outlet pipe, and flows back to the mud pool through the mud filter, so as to realize the recycling of the mud; A mud flange compass is also fixedly arranged at the connection between the experimental soil box and the rear drill rod. The mud flange compass is fixedly connected to the experimental soil box through flange bolts, and a mud outlet is arranged on the mud flange compass; one side of the rear drill rod is connected to the mud motor through a universal joint, and the other side passes through the mud flange compass and is fixed on the mud flange compass; The terminal control and data processing system is connected to the drilling and pulling back force system, the pressure sensor, and the humidity sensor through the data receiver, and is connected to the drilling and pulling back force system to control the pulling back force and torque and transmit the data to the terminal for recording and monitoring; it is connected to the pressure sensor and the humidity sensor to obtain the real-time condition of the soil to achieve the soil standard required for the simulation, and record the soil pressure during the experiment; The mud circulation system also includes a grouting system; the grouting system includes a mud flow meter and a mud valve, and the mud flow rate is controlled by the mud valve and the mud flow meter during the circulation of the mud; the mud flow meter and the mud valve are connected to the terminal control and data processing system through a data receiver; The experimental method of the above test device comprises the following steps: S100, simulating a pilot hole in the experimental soil box, initializing the power of the drilling and back-pulling power system, and connecting the pressure sensor, humidity sensor, mud flow meter, mud valve, and the drilling and back-pulling power system to the terminal control and data processing system through the data receiver; S200, setting mud configuration and optimization, mud motor parameters, initializing the grouting system through the mud flow meter and mud valve; S300, start the power device to drill the pilot hole and perform forward power hole expansion simulation; S400, records the parameters of mud flow, mud motor working parameters, pull-back force, soil pressure, humidity, and torque; S500, changing one of the parameters of mud flow, pressure, mud motor working parameters, soil pressure, and humidity, and re-performing steps S200 to S400, and finally comparing to obtain the construction parameters.

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