CN201687513U - Downhole drilling hydraulic fracturing system - Google Patents

Abstract

The utility model discloses an underground borehole hydraulic fracturing system which comprises a borehole sealing device, a high pressure injection pump, a power device and an electrical cabinet; the electrical cabinet is electrically connected with the power device, the power device is in transmission connection with the high pressure injection pump, the high pressure injection pump is connected with the borehole sealing device by a high pressure hose, and the electrical cabinet is connected with a ground monitoring control device by a control conducting wire. The underground borehole hydraulic fracturing system has small volume, easy operation, high safety, can realize the underground borehole hydraulic fracturing process through ground operation, achieves the purposes of gas control and coal seam gas exploitation, remarkably improves the underground single bore drainage ability, has good market prospect and is easy for popularization and application.

Description

Downhole drilling hydraulic fracturing system

technical field

The utility model belongs to the technical field of mine gas treatment and development, in particular to an underground drilling hydraulic fracturing system.

Background technique

As an important process for coalbed gas control and coalbed methane development, downhole drilling hydraulic fracturing can increase the single-hole gas extraction volume and concentration of coal, improve the efficiency of gas extraction, thereby inhibiting the occurrence of gas accidents and accelerating the coalbed methane industry. development of. However, due to the limitation of downhole conditions and fracturing technology, the equipment needs to be miniaturized, simplified, easy to operate, and high in safety. However, there is currently no equipment for hydraulic fracturing of downhole boreholes. Although the surface coalbed gas fracturing equipment is very mature, it cannot be used in wells due to its huge volume.

Utility model content

In order to solve the deficiencies in the prior art, the utility model provides an underground drilling hydraulic fracturing system specially suitable for use in mines.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: the downhole drilling hydraulic fracturing system includes a hole sealing device, a high-pressure water injection pump, a power device and an electric control cabinet, the electric control cabinet is electrically connected with the power device, and the power device is connected with the power device. The high-pressure water injection pump is connected by transmission, the high-pressure water injection pump is connected to the sealing device through a high-pressure hose, and the electric control cabinet is connected to the ground monitoring and control device through control wires.

Two probes are arranged above the system, and the probes are connected with the ground monitoring and control device through data lines.

The hole sealing device includes a hole sealing device, a connecting pipe in the hole and an anchor, the rear end of the sealing device is connected to the front end of the connecting pipe in the hole, the rear end of the connecting pipe in the hole is connected to a high-pressure hose, and the anchor is arranged in the hole to connect Tube rear.

The power device includes a flameproof motor, and the flameproof motor is connected to the high-pressure water injection pump through a transmission.

With the above technical scheme, the hole sealing device has the advantages of high expansion rate, high compressive strength, good sealing performance, and strong adaptability; the connecting pipe in the hole can be of any length in meters, which can adapt to the small underground operating space and complex conditions. characteristics, and can resist high pressure (above 40MPa), and at the same time, the joint part of the connecting pipe in the hole is required to be firmly and tightly connected; the anchor has the characteristics of simple operation, high compression resistance, high friction with the hole wall, and exquisite production. The hole sealer and connecting pipe in the hole will not move in the hole under the action of high-pressure water; the high-pressure hose has the characteristics of high pressure resistance, firm butt joint, tight seal, and the length can be determined according to needs; the high-pressure water injection pump has simple operation, Small size, large displacement (1m ³ /min), high pressure (above 40MPa), fast boosting speed, adaptable to complex underground conditions, strong moisture resistance, safety and explosion-proof; the transmission can control high pressure by using different gears The displacement and pressure of the pump are small, safe and explosion-proof; the motor can provide sufficient power for the high-pressure pump, and it is explosion-proof; the electric control cabinet controls the whole process of hydraulic fracturing for underground drilling, and has the functions of starting and stopping the pump, heating the high-pressure pump, Keep the operator away from the high-pressure area; one probe monitors the fracturing situation at the fracturing site, and the other probe monitors the equipment for hydraulic fracturing in the downhole drilling; the ground monitoring and control device connects the downhole probe and the electric control cabinet through a dedicated data line, and returns Downhole fracturing scenarios and construction data, to ensure safe operation and accurate real-time records.

The utility model is small in size, easy to operate, and high in safety. It can realize the hydraulic fracturing process of downhole drilling by operating on the ground, so as to solve the problems of gas control and coalbed methane development in soft, low-permeability, and high-burst coal bodies, and significantly improve the underground The single-hole drainage capacity has a good market prospect and is easy to popularize and apply.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Detailed ways

As shown in Figure 1, the downhole drilling hydraulic fracturing system of the present utility model includes a hole sealing device, a high-pressure water injection pump 1, a power unit and an electric control cabinet 2, the electric control cabinet 2 is electrically connected with the power unit, and the power unit is connected to the high-pressure The water injection pump 1 is connected by transmission, the high-pressure water injection pump 1 is connected with the hole sealing device through the high-pressure hose 3 , and the electric control cabinet 2 is connected with the ground monitoring control device 5 through the control wire 4 . The power device includes a flameproof motor 6, and the flameproof motor 6 is connected to the high-pressure water injection pump 1 through a transmission 7. The hole sealing device is inserted into the pre-constructed borehole 12 in the coal seam 11. The hole sealing device includes a hole sealing device 8, an in-hole connecting pipe 9 and an anchor 10. The rear end of the hole sealing device 8 is connected to the front end of the in-hole connecting pipe 9 , according to the drilling depth, several connection pipes 9 in the hole are arranged and connected end to end in turn, the rear end of the connection pipe 9 in the hole is connected with the high-pressure hose 3, the anchor 10 is arranged at the rear part of the connection pipe 9 in the hole, and the anchor 10 The bore hole 12 is blocked externally. A probe 13 and a probe 14 are arranged above the system. The probe 13 and the probe 14 are connected to the ground monitoring and control device 5 through the data line 15 and the data line 16 respectively. The probe 13 monitors the fracturing situation at the fracturing site, and the probe 14 monitors the hydraulic pressure of the downhole drilling. Equipment for fracturing. The electric control cabinet 2 and the ground monitoring and control device 5 are prior art and will not be described in detail.

Claims (4)

1. The hydraulic fracturing system for downhole drilling is characterized in that it includes a hole sealing device, a high-pressure water injection pump, a power unit and an electric control cabinet. The water pump is connected to the sealing device through a high-pressure hose, and the electric control cabinet is connected to the ground monitoring and control device through a control wire. 2. The downhole drilling hydraulic fracturing system according to claim 1, characterized in that two probes are arranged above the system, and the probes are connected to the ground monitoring and control device through data lines. 3. The downhole drilling hydraulic fracturing system according to claim 1 or 2, characterized in that: the hole sealing device includes a hole sealing device, a connecting pipe in the hole and an anchor, and the rear end of the hole sealing device is connected to the hole The front end of the pipe is connected, the rear end of the connecting pipe in the hole is connected with the high-pressure hose, and the anchor is arranged at the rear of the connecting pipe in the hole. 4. The downhole drilling hydraulic fracturing system according to claim 3, characterized in that: the power device includes an explosion-proof motor, and the explosion-proof motor is connected to the high-pressure water injection pump through a transmission.

Images