Device and method for detecting formation temperature and pressure data while drilling in long-distance directional drilling in mines

Abstract

The present invention discloses a device and method for detecting stratum temperature and pressure data while drilling in long-distance directional drilling in mines, and relates to the technical field of safe mining in mines. The present invention comprises a drilling tool assembly, a directional drilling rig, a mud pump group and an auxiliary system, and a control system for a detection device while drilling. The drilling tool assembly comprises a drill bit, a microchip detector while drilling delivery device, a mud pulse signal transmission short section, a drill rod, and a stabilizer. The drill bit, the microchip detector while drilling delivery device, the mud pulse signal transmission short section, the stabilizer, and the drill rod are connected in sequence by threads, and the microchip detector while drilling delivery device is provided. In the present invention, by adopting a microchip collector, the microchip collector has low manufacturing cost and low use cost. Even when accidents such as drill sticking and hole collapse occur, the economic loss caused by the loss of drilling tools is also low. By using the microchip collector, complete temperature and pressure data in the hole body at different drilling times can be collected.

Description

Technical Field

[0001] The present invention relates to the technical field of safe mining of mines, and in particular to a device and method for detecting stratum temperature and pressure data while drilling in long-distance directional drilling of mines. Background Art

[0002] Long-distance directional drilling in coal mines has gradually become the main means of coal mine gas control. Compared with traditional gas extraction tunnels, long-distance directional drilling has the advantages of low cost and short construction period. At present, long-distance directional drilling technology in coal mines has a relatively mature mud pulse transmission system and borehole inclinometer, which can monitor the drilling trajectory in real time, allowing drilling engineers to adjust the drilling trajectory in time. In terms of measuring formation parameters while drilling, although various types of drilling detectors have been developed, such as drilling gamma, drilling temperature and pressure, and drilling electromagnetic detectors, which can identify coal rocks and aquifers and monitor coal seam temperature, pressure and other parameters while drilling, existing drilling detectors still have the following shortcomings:

[0003] 1. Existing downhole drilling instruments require a mud pulse transmission system or an electromagnetic wave transmission system. These instruments are complex in structure and expensive, resulting in high daily operating costs and limited application scenarios.

[0004] 2. When accidents such as drill sticking and hole collapse occur during directional drilling, it is difficult to salvage the drilling equipment at the bottom of the hole, and the drilling equipment is easily lost, causing economic losses.

[0005] 3. Existing instruments can only measure the temperature, pressure or other physical properties of the coal or rock layer at the bottom of the hole, but cannot measure the temperature and pressure distribution of the coal layer along the hole at different drilling times;

[0006] In response to the above problems, the inventors proposed a device and method for detecting formation temperature and pressure data while drilling long-distance directional drilling in mines to solve the above problems. Summary of the Invention

[0007] In order to solve the above problems, the purpose of the present invention is to provide a device and method for detecting stratum temperature and pressure data while drilling long-distance directional drilling in mines.

[0008] To solve the above technical problems, the present invention adopts the following technical solution: a device for detecting formation temperature and pressure data while drilling in long-distance directional drilling in mines, comprising a drilling tool assembly, a directional drilling rig, a mud pump assembly and an auxiliary system, and a detection while drilling device control system. The drilling tool assembly comprises a drill bit, a microchip detector while drilling delivery device, a mud pulse signal transmission short section, a drill rod, and a centralizer. The drill bit, the microchip detector while drilling delivery device, the mud pulse signal transmission short section, the centralizer, and the drill rod are sequentially connected by threads, and the microchip detector while drilling delivery device includes a hollow short section.

[0009] The directional drilling rig provides torque and power to the drilling tool assembly;

[0010] The mud pump assembly and auxiliary system include a cuttings collection device, a microchip detector orifice delivery device, a mud pump, a mud tank, a high-pressure pipeline and a valve assembly. The cuttings collection device is fixed to the orifice with screws, and the orifice microchip detector, mud pump, mud tank and valve are connected in sequence through a high-pressure pipeline.

[0011] The detection while drilling device control system is used to control the mud pump and the mud pulse signal transmission short section. The detection while drilling device control system sends instructions to the mud pulse signal transmission short section by controlling the frequency of the mud pump, thereby controlling the microchip detector while drilling delivery device to release the microchip detector. The detection while drilling device control system records the release time of the microchip detector, thereby determining the position of the drill bit at the moment of release of the microchip detector.

[0012] Preferably, the hollow part of the microchip detector while drilling device is used to pass drilling mud and water, a plurality of grooves are provided on the outer wall of the microchip detector while drilling device, and a plurality of electronically controlled clamps are installed, the clamps fix the microchip detector to the outer wall of the microchip detector while drilling device, the microchip detector is in contact with the fluid in the borehole, the microchip detector measures the temperature and pressure data at the bottom of the hole or in the hole body, and the mud pulse signal transmission short section controls the opening and closing of the clamp.

[0013] Preferably, the rock cuttings collecting device is used to collect drilling rock cuttings and microchip detectors released by the microchip detector while drilling release device. The rock cuttings collecting device is an annular screen, and the annular screen is fixed at the hole mouth by a plurality of steel cables and screws.

[0014] Preferably, the orifice microchip detector orifice delivery device consists of a high-pressure resistant tank body and a high-pressure resistant sealing cover. The orifice microchip detector orifice delivery device is used to deliver the microchip detector at the orifice. The orifice microchip detector orifice delivery device is connected in parallel with the mud pipeline through a high-pressure resistant pipeline. High-pressure valves are respectively installed at the mud inlet and outlet of the high-pressure resistant tank body.

[0015] The present invention also provides a method for using a device for detecting formation temperature and pressure data while drilling in a long-distance directional drilling operation in a mine, comprising the following steps:

[0016] S1. Install the microchip detector on the hollow nipple of the microchip detector while drilling device and measure the temperature and pressure data in the borehole along with the drill bit;

[0017] S2. Through the control system of the drilling detection device outside the hole mouth, the microchip detector drilling device is controlled to release the microchip detector at different drilling times, thereby obtaining complete hole body temperature and pressure data at different drilling times.

[0018] The present invention also provides a method for using a device for detecting formation temperature and pressure data while drilling in a long-distance directional drilling operation in a mine, comprising the following steps:

[0019] S1. Place the microchip detector into the orifice microchip detector orifice delivery device;

[0020] S2. Use a mud pump and valve to send the microchip detector into the drill pipe. The microchip detector is sent along with the drilling mud, passes through the drill pipe and drill bit from the hole mouth, and then returns to the borehole from the borehole annulus to measure the temperature and pressure data of the completed hole body. According to different injection times, the hole body temperature and pressure data under different drilling footage conditions can be measured.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. In the present invention, by adopting a microchip collector, the cost of manufacturing the microchip collector is low, and the cost of using the microchip collector is low. Even when accidents such as drill sticking and hole collapse occur, the economic loss caused by the loss of the drilling tool is also low.

[0023] 2. In the present invention, by using a microchip collector, complete temperature and pressure data inside the hole at different drilling times can be collected.

[0024] 3. In the present invention, the release time of the microchip detector is recorded by using the control system of the drilling detection device to determine the temperature and pressure field distribution in the hole body at different drilling times. There is no need to calculate the delay time of the microchip, thereby improving the measurement accuracy of the wellbore temperature and pressure field. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the directional drilling while drilling detection device of the present invention.

[0027] Figure 2 This is a schematic structural diagram of the device for deploying a microchip detector while drilling according to the present invention.

[0028] Figure 3It is a structural schematic diagram of the orifice microchip detector collection device of the present invention.

[0029] Figure 4 This is a schematic diagram of the structure of the orifice delivery device of the microchip detector of the present invention.

[0030] Figure 5 It is a schematic diagram of the status of the directional drilling while drilling detection device and the rock layer and coal seam of the present invention. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figure 1-5 As shown, the present invention provides a device for detecting formation temperature and pressure data while drilling in long-distance directional drilling in mines, including a drilling tool assembly, a directional drilling rig, a mud pump group and an auxiliary system and a detection while drilling device control system. The drilling tool assembly includes a drill bit, a microchip detector while drilling delivery device, a mud pulse signal transmission short section, a drill rod, and a centralizer. The drill bit, the microchip detector while drilling delivery device, the mud pulse signal transmission short section, the centralizer, and the drill rod are connected in sequence by threads. The microchip detector while drilling delivery device includes a hollow short section. The centralizer is used to control the posture of the drilling pipe string to prevent functional short sections such as the microchip detector while drilling delivery device and the mud pulse signal transmission short section from excessive friction with the borehole wall, causing functional damage.

[0033] The directional drilling rig provides torque and power for the drilling tool assembly, and the directional drilling rig is a conventional directional drilling rig in a coal mine;

[0034] The mud pump assembly and auxiliary system include a rock cuttings collection device, a microchip detector orifice delivery device, a mud pump, a mud tank, a high-pressure pipeline and a valve assembly. The rock cuttings collection device is fixed to the orifice with screws, and the orifice microchip detector, the mud pump, the mud tank and the valve are sequentially connected via a high-pressure pipeline. The mud pump assembly and auxiliary system are used to provide drilling mud for lubricating the drill bit and carrying drill cuttings for drilling. They can also be used to provide mud for the microchip detector orifice delivery device to deliver the microchip detector at the orifice.

[0035] The detection while drilling device control system is used to control the mud pump and the mud pulse signal transmission short section. The detection while drilling device control system sends instructions to the mud pulse signal transmission short section by controlling the frequency of the mud pump, thereby controlling the microchip detector while drilling delivery device to release the microchip detector. The detection while drilling device control system records the release time of the microchip detector, thereby determining the position of the drill bit at the moment of release of the microchip detector.

[0036] The hollow part of the microchip detector while drilling device is used to pass drilling mud and water. A number of grooves are opened on the outer wall of the hollow short section. A number of electronically controlled clamps are installed on the outer wall of the microchip detector while drilling device. The clamps fix the microchip detector to the outer wall of the microchip detector while drilling device. The microchip detector contacts the fluid in the borehole. The microchip detector measures the temperature and pressure data at the bottom of the hole or in the hole body. The mud pulse signal transmission short section controls the opening and closing of the clamp to allow the microchip detector to fall off and be discharged from the borehole along with the fluid in the borehole annulus.

[0037] The rock cuttings collection device is used to collect drilling rock cuttings and microchip detectors deployed by the microchip detector while drilling deployment device. The rock cuttings collection device is an annular screen, and the annular screen is fixed at the hole mouth by a number of steel cables and screws. When the rock cuttings collection device is in use, the drill rod passes through the center of the annular screen. During the drilling process, the rock cuttings and microchip detectors returned in the borehole annulus fall on the annular screen, which is convenient for the drilling engineer to collect.

[0038] The orifice microchip detector orifice delivery device consists of a high-pressure resistant tank body and a high-pressure resistant sealing cover. The orifice microchip detector orifice delivery device is used to deliver the microchip detector at the orifice. The orifice microchip detector orifice delivery device is connected in parallel with the mud pipeline through a high-pressure resistant pipeline. High-pressure valves are respectively installed at the mud inlet and outlet of the high-pressure resistant tank body.

[0039] The present invention also provides a method for using a device for detecting formation temperature and pressure data while drilling in a long-distance directional drilling operation in a mine, comprising the following steps:

[0040] S1. Install the microchip detector on the microchip detector while drilling device and measure the temperature and pressure data in the borehole along with the drill bit;

[0041] S2. Through the control system of the drilling detection device outside the hole, the microchip detector drilling device is controlled to release the microchip detector at different drilling times. The microchip detector is discharged from the hole with the mud, thereby obtaining complete hole body temperature and pressure data at different drilling times.

[0042] The present invention also provides a method for using a device for detecting formation temperature and pressure data while drilling in a long-distance directional drilling operation in a mine, comprising the following steps:

[0043] S1. Place the microchip detector into the orifice microchip detector orifice delivery device;

[0044] S2. Use a mud pump and valve to send the microchip detector into the drill pipe. The microchip detector is sent along with the drilling mud, passes through the drill pipe and drill bit from the hole mouth, and then returns to the borehole from the borehole annulus to measure the temperature and pressure data of the completed hole body. According to different injection times, the hole body temperature and pressure data under different drilling footage conditions can be measured.

[0045] Example 1: First, a directional drill is used to drill a hole in the target area. After drilling a certain distance, that is, after a complete hole is formed in the target area, the drill bit and drill rod are removed;

[0046] Install a drilling hole cuttings collection device at the drilling hole mouth;

[0047] Activate the microchip detector, install the microchip detector on the microchip detector while drilling delivery device, connect the drill bit, the microchip detector while drilling delivery device, the mud pulse signal transmission short section, and the drill pipe in sequence, place them in the borehole, and start drilling using a directional drilling rig;

[0048] The drilling footage and drilling speed are recorded based on the number of drill rods sent in and the drilling time. At this time, the microchip detector records the temperature and pressure data of the formation encountered by the drill bit in real time.

[0049] According to the drilling design plan, when the drill bit reaches the position of different coal seams, the control system of the detection while drilling device sends a mud pulse signal to the mud pulse signal transmission short section, controls the microchip detector while drilling delivery device to release the microchip detector, and records the release time of the microchip detector;

[0050] After the microchip detector is released, it is returned to the borehole by the mud through the borehole annulus. During the return process, the temperature and pressure data of the entire hole body are recorded in real time. When the microchip detector returns to the hole mouth, it falls into the rock cuttings collection device installed at the hole mouth together with the drilling cuttings. The rock cuttings collection device collects the rock cuttings and the microchip detector.

[0051] Drilling engineers record the moment the microchip detector returns to the hole and read the temperature and pressure data inside the detector.

[0052] Example 2: First, a directional drill is used to carry out drilling operations in the target area;

[0053] After drilling into the predetermined position, the microchip detector is activated, the microchip detector orifice of the drill hole is placed into the device, and the high-pressure resistant sealing cover is covered;

[0054] Open valve 1 to allow drilling mud to fill the orifice microchip detector orifice delivery device. When the pressure in the orifice microchip detector orifice delivery device is consistent with the connecting pipe, open valve 2, and the drilling mud will send the microchip detector inside the orifice microchip detector orifice delivery device into the drilling drill pipe. At the same time, the drilling engineer records the delivery time of the microchip detector and the drilling footage at that time (reference Figure 5 );

[0055] At this moment, the microchip detector begins to record the temperature and pressure data inside the drill pipe and flows to the bottom of the hole with the drilling mud. When the microchip detector passes through the drill bit water hole, it begins to return to the hole mouth through the drill annulus. At this time, the microchip detector records the temperature and pressure data inside the hole in real time.

[0056] When the microchip detector returns to the hole, it falls into the rock cuttings collection device installed at the hole together with the drilling cuttings. The drilling engineer records the time when the microchip detector returns to the hole and reads the temperature and pressure data inside the detector.

[0057] According to the time of placing the microchip detector and the displacement of drilling mud pumped in, the time when the microchip detector reaches the bottom of the borehole is calculated, and the formation position where the temperature and pressure data measured by the microchip detector are located is determined.

[0058] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A device for detecting formation temperature and pressure data while drilling for long-distance directional drilling in mines, comprising a drilling tool assembly, a directional drilling rig, a mud pump assembly and auxiliary systems, and a control system for a while-drilling detection device, characterized in that: The drilling tool assembly includes a drill bit, a microchip detector while drilling device, a mud pulse signal transmission short section, a drill pipe, and a centralizer. The drill bit, the microchip detector while drilling device, the mud pulse signal transmission short section, the centralizer, and the drill pipe are connected in sequence through threads. The microchip detector while drilling device includes a hollow short section. The directional drilling rig provides torque and power to the drilling tool assembly; The mud pump assembly and auxiliary system include a cuttings collection device, a microchip detector orifice delivery device, a mud pump, a mud tank, a high-pressure pipeline and a valve assembly. The cuttings collection device is fixed to the orifice with screws, and the orifice microchip detector, mud pump, mud tank and valve are connected in sequence through a high-pressure pipeline. The detection while drilling device control system is used to control the mud pump and the mud pulse signal transmission sub. The detection while drilling device control system controls the frequency of the mud pump to send instructions to the mud pulse signal transmission sub, thereby controlling the microchip detector while drilling delivery device to release the microchip detector. The detection while drilling device control system records the release time of the microchip detector, thereby determining the position of the drill bit at the moment of release of the microchip detector. The hollow part of the microchip detector while drilling device is used to pass drilling mud and water. A number of grooves are opened on the outer wall of the hollow short section. A number of electronically controlled clamps are installed on the outer wall of the microchip detector while drilling device. The clamps fix the microchip detector to the outer wall of the microchip detector while drilling device. The microchip detector is in contact with the fluid in the borehole. The microchip detector measures the temperature and pressure data at the bottom of the hole or in the hole body. The mud pulse signal transmission short section controls the opening and closing of the clamp.

2. The device for detecting stratum temperature and pressure data while drilling in long-distance directional drilling in mines according to claim 1, characterized in that: The rock cuttings collecting device is used to collect drilling rock cuttings and microchip detectors dropped by the microchip detector dropping-while-drilling device. The rock cuttings collecting device is an annular screen fixed to the hole opening by a plurality of steel cables and screws.

3. The device for detecting stratum temperature and pressure data while drilling in long-distance directional drilling in mines according to claim 1, characterized in that: The orifice microchip detector orifice delivery device consists of a high-pressure resistant tank body and a high-pressure resistant sealing cover. The orifice microchip detector orifice delivery device is used to deliver the microchip detector at the orifice. The orifice microchip detector orifice delivery device is connected in parallel with the mud pipeline through a high-pressure resistant pipeline. High-pressure valves are respectively installed at the mud inlet and outlet of the high-pressure resistant tank body.

4. A method for using the device for detecting stratum temperature and pressure data while drilling in long-distance directional drilling in a mine according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Install the microchip detector on the microchip detector while drilling device and measure the temperature and pressure data in the borehole along with the drill bit; S2. Through the control system of the drilling detection device outside the hole mouth, the microchip detector drilling device is controlled to release the microchip detector at different drilling times, thereby obtaining complete hole body temperature and pressure data at different drilling times.

5. A method for using the device for detecting stratum temperature and pressure data while drilling in long-distance directional drilling in a mine according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Place the microchip detector into the orifice microchip detector orifice delivery device; S2. Use a mud pump and valve to send the microchip detector into the drill pipe. The microchip detector is sent along with the drilling mud, passes through the drill pipe and drill bit from the hole mouth, and then returns to the borehole from the borehole annulus to measure the temperature and pressure data of the completed hole body. According to different injection times, the hole body temperature and pressure data under different drilling footage conditions can be measured.

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