A wired transmission drill pipe for underground directional drilling in coal mines

Abstract

The present invention relates to the technical field of directional drill pipes, and specifically relates to a wired transmission drill pipe for directional drilling in coal mines. When the drill pipe needs to change direction, if the outer side of the drill pipe contacts the wellbore wall at the bending position, the first pipe and the second pipe reciprocally move away from and close to each other, causing the outer walls of the first pipe and the second pipe to continuously rub against the wellbore wall and undergo relative movement, thereby avoiding the problem of drill pipe jamming between the drill pipe body and the wellbore wall. Moreover, when the drill pipe body is moving, since the first pipe and the second pipe are in a state of reciprocally approaching and separating, the first pipe and the second pipe are in a creeping state on the drill pipe body. Therefore, it can effectively prevent condensation on the wellbore wall from adhering to the drill pipe body, resulting in the problem of drill pipe jamming between the drill pipe body and the drill bit on the drill pipe body.

Description

Technical Field

[0001] The present invention relates to the technical field of directional drill pipes, and specifically relates to a wired transmission drill pipe for directional drilling in coal mines. Background Art

[0002] The main use of drill pipes is to transport drilling mud to the drill bit. Drill pipes can be used multiple times in coal mine mining and must be able to withstand huge internal and external pressures, twists, bends, and vibrations;

[0003] Drill pipes are divided into ordinary drill pipes and directional drill pipes. Directional drill pipes can change the drilling direction in real time during drilling; directional drill pipes are also known as wired transmission drill pipes;

[0004] A wired transmission drill pipe is a special drill pipe integrated with a data transmission function. It adds internal wires and connectors on the basis of an ordinary drill pipe, enabling the ground control system to receive downhole data in real time and perform remote control; the internal structure of a wired transmission drill pipe is much more complex than that of an ordinary drill pipe and contains a variety of precision components; when the wired transmission drill pipe is used underground for drilling, the wired drill pipe can transmit its own position and drilling direction to the ground in real time, and the ground transmits control signals through the internal wires, enabling the drill pipe to change the drilling direction;

[0005] When a wired transmission drill pipe is used in a coal mine, especially when the wired transmission drill pipe changes direction or moves, the drilling fluid forms a mud cake on the wellbore wall, sticking to the drill pipe, and the degree of wellbore curvature is too large, resulting in uneven stress on the drill pipe in the bent section and being easily stuck at the bend; during the drilling process of the drill pipe and the drill bit provided at its end, the problem of sticking of the drill pipe occurs, which further leads to the problem of drilling failure.

[0006] In summary, to solve the technical problems proposed in this article, the present invention proposes a wired transmission drill pipe for directional drilling in coal mines. Summary of the Invention

[0007] The present invention proposes a wired transmission drill pipe for directional drilling in coal mines. The wired transmission drill pipe includes a drill pipe body; the drill pipe body is provided as a hollow pipe, and a data transmission line, a connector, a central positioning device, and a signal repeater are arranged inside the drill pipe body; drill nozzles are provided on the outer walls at both ends of the drill pipe body; the drill pipe body further includes:

[0008] A strip-shaped slider, which is arranged on the outer wall of the middle part of the drill pipe body;

[0009] A sliding pipe, which is slidably connected to the outer wall of the drill pipe body. A chute is provided on the inner wall of the sliding pipe, and the strip-shaped slider is slidably connected inside the chute. A spring is provided between the strip-shaped slider and the chute;

[0010] A blocking ring, which is fixedly arranged at both ends of the drill pipe body;

[0011] The sliding pipe is arranged in two sections and is divided into a first pipe and a second pipe. There is a telescopic device between the first pipe and the second pipe; there is a sliding rod between the first pipe and the second pipe.

[0012] As a preferred solution of the present application; the drill pipe nozzle is opened on the surface of the blocking ring, and the drill pipe nozzle is divided into a water spraying port and a water conveying port; the water spraying port is parallel to the drill pipe body, the water conveying port is perpendicular to the drill pipe body, and one end of the water conveying port is communicated with the inside of the drill pipe body, and the other end is communicated with the middle part of the water spraying port.

[0013] As a preferred solution of the present application; a connecting plate is arranged at one end of the blocking ring close to the middle of the drill pipe body, and a fixing block is arranged at one end of the connecting plate away from the drill pipe body; a cleaning rod is slidably connected inside the fixing block through a spring, and the cleaning rod corresponds to the water spraying port; one end of the cleaning rod away from the blocking ring extends out of the fixing block, and an annular plate is arranged at one ends of a plurality of cleaning rods away from the fixing block.

[0014] As a preferred solution of the present application; the middle part of the cleaning rod is hollow, and an opening is arranged at one end of the cleaning rod close to the blocking ring; a communication hole is arranged at the lower end of the cleaning rod, and an opening is arranged on the outer side of one end of the cleaning rod away from the communication hole, and when the cleaning rod enters the inside of the water spraying port, the communication hole is communicated with the water conveying port.

[0015] As a preferred solution of the present application; when the cleaning rod is inside the fixing block, the opening at one end of the cleaning rod close to the blocking ring, the communication hole and the opening on the outer side of one end of the cleaning rod away from the communication hole are all inside the fixing block.

[0016] As a preferred solution of the present application; the end part of one end of the cleaning rod close to the blocking ring is tapered.

[0017] As a preferred solution of the present application; cutting blocks are arranged on the outer walls of the first pipe and the second pipe on the sliding pipe, and the cutting blocks are spirally distributed; and the cutting blocks on the first pipe and the second pipe are separated from each other.

[0018] As a preferred solution of the present application; an arc-shaped groove is opened on the outer wall of each blocking ring, and the arc-shaped groove is inclined and is not communicated with the water spraying port and the water conveying port.

[0019] The beneficial effects of the present invention are as follows:

[0020] When the drill pipe needs to change direction, if the outer side of the drill pipe contacts the wellbore wall at the bending part, the first pipe and the second pipe reciprocate away from and close to each other, so that the outer walls of the first pipe and the second pipe continuously rub against the wellbore wall and move relatively, thereby avoiding the problem of sticking of the drill pipe body to the wellbore wall. And when the drill pipe body is moving, since the first pipe and the second pipe are in a state of reciprocating close to and away from each other, the first pipe and the second pipe are in a creeping state on the drill pipe body, so it can effectively prevent the condensation on the wellbore wall from sticking to the drill pipe body, resulting in the problem of sticking of the drill pipe body and the drill bit on the drill pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of the drill pipe body in the present invention;

[0022] Figure 2 is a structural view of the sliding pipe in the present invention;

[0023] Figure 3 is an exploded view of the first pipe and the second pipe in the present invention;

[0024] Figure 4 is a structural view of the blocking ring in the present invention;

[0025] Figure 5 is Figure 4 a partial cross-sectional view in;

[0026] Figure 6 is Figure 5 a partial enlarged view in.

[0027] In the figure: drill pipe body 1, strip-shaped slider 11, sliding pipe 12, first pipe 121, second pipe 122, telescopic device 123, blocking ring 13, water spray opening 131, water inlet 132, connecting plate 133, fixed block 134, cleaning rod 135, annular plate 136, communication hole 137, arc-shaped groove 138, cutting block 14. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0029] Embodiment 1:

[0030] As Figures 1 to 6 shown; a wired transmission drill pipe for directional drilling in coal mines, the wired transmission drill pipe includes a drill pipe body 1; the drill pipe body 1 is arranged as a hollow pipe, and a data transmission line, a connector, a central positioning device and a signal repeater are arranged inside the drill pipe body 1; drill pipe nozzles are provided on the outer walls at both ends of the drill pipe body 1; the drill pipe body 1 further includes:

[0031] A bar-shaped slider 11, the bar-shaped slider 11 is arranged on the outer wall of the middle part of the drill pipe body 1;

[0032] A sliding pipe 12, the sliding pipe 12 is slidably connected to the outer wall of the drill pipe body 1, a chute is opened on the inner wall of the sliding pipe 12, and the bar-shaped slider 11 is slidably connected inside the chute, and there is a spring between the bar-shaped slider 11 and the chute;

[0033] A blocking ring 13, the blocking ring 13 is fixedly arranged at both ends of the drill pipe body 1;

[0034] The sliding pipe 12 is arranged in two sections, the sliding pipe 12 is divided into a first pipe 121 and a second pipe 122, and a telescopic device 123 is arranged between the first pipe 121 and the second pipe 122; a sliding rod is arranged between the first pipe 121 and the second pipe 122;

[0035] The drill pipe nozzle is opened on the surface of the blocking ring 13, and the drill pipe nozzle is divided into a water spraying port 131 and a water inlet 132; the water spraying port 131 is parallel to the drill pipe body 1, the water inlet 132 is perpendicular to the drill pipe body 1, and one end of the water inlet 132 is communicated with the inside of the drill pipe body 1, and the other end is communicated with the middle part of the water spraying port 131;

[0036] One end of the blocking ring 13 close to the middle part of the drill pipe body 1 is provided with a connecting plate 133, and one end of the connecting plate 133 far from the drill pipe body 1 is provided with a fixing block 134; a cleaning rod 135 is slidably connected inside the fixing block 134 through a spring, and the cleaning rod 135 corresponds to the water spraying port 131; one end of the cleaning rod 135 far from the blocking ring 13 extends out of the fixing block 134, and a plurality of ends of the cleaning rod 135 far from the fixing block 134 are provided with an annular plate 136.

[0037] The specific working process is as follows:

[0038] When in use, a drill bit is connected to one end of the drill pipe body 1, and the drill bit drills into the ground, driving the drill pipe body 1 to move into the ground. During the process, the data transmission line, connector, central positioning device and signal repeater in the drill pipe body 1 work, and the traveling direction and position of the drill pipe body 1 and the drill bit are transmitted to the ground in real time. After the ground or the position information of the drill pipe body 1, according to the pre-designed drilling track, the staff can transmit signals to the drill pipe body 1 and the drill bit through the data transmission line, connector and central positioning device, and the drill bit changes the drilling direction, driving the drill pipe to change the traveling direction, so that the drill pipe body 1 can travel according to the pre-designed track until it drills out from the other end of the ground;

[0039] In the above process, a sliding pipe 12 is arranged on the outer side of the middle part of the drill pipe body 1. The sliding pipe 12 is divided into a first pipe 121 and a second pipe 122. Chutes are opened on the inner walls of the first pipe 121 and the second pipe 122, so that the strip-shaped slider 11 arranged on the outer side of the drill pipe body 1 is slidably connected inside the chute through a spring. During the process of the drill pipe body 1 advancing, the mud in the ground mud pool is pumped into the drill pipe body 1 through a high-pressure pump, and then sprayed out through the drill pipe nozzle, so that the mud lubricates the drill pipe, and the mud can take out the soil and the like generated during drilling from the drill hole;

[0040] And when the drill pipe body 1 drills underground, the drill pipe body 1 will drive the sliding pipe 12 to move. During the movement of the drill pipe body 1, the sliding pipe 12 will slide on the surface of the drill pipe body 1. The sliding pipe 12 is composed of a first pipe 121 and a second pipe 122, and a telescopic device 123 (the telescopic device 123 is an electric telescopic cylinder in the prior art) is arranged between the first pipe 121 and the second pipe 122. During the process of the drill pipe body 1 drilling underground, the telescopic device 123 extends and contracts, so that the gap between the first pipe 121 and the second pipe 122 continuously becomes larger and smaller, so that the first pipe 121 and the second pipe 122 make actions of moving away from and approaching each other on the drill pipe body 1; when the drill pipe body 1 moves to the bending place, the first pipe 121 and the second pipe 122 continuously move on the drill pipe body 1. When the drill pipe needs to change direction, if the outer side of the drill pipe contacts the well wall at the bending place, the first pipe 121 and the second pipe 122 reciprocally move away from and approach each other, so that the outer walls of the first pipe 121 and the second pipe 122 continuously rub against the well wall and make relative movement, thereby avoiding the problem of sticking of the drill pipe body 1 and the well wall; and when the drill pipe body 1 moves, since the first pipe 121 and the second pipe 122 are in a reciprocating state of approaching and moving away from each other, the first pipe 121 and the second pipe 122 are in a peristaltic state on the drill pipe body 1, so that it can effectively prevent the condensation on the well wall from sticking to the drill pipe body 1, resulting in the problem of sticking of the drill pipe body 1 and the drill bit on the drill pipe body 1;

[0041] And during the process of the drill pipe body 1 drilling underground, if the drill pipe body 1 has a sticking problem, at this time, the contraction force between the first pipe 121 and the second pipe 122 can be increased, so that when the first pipe 121 and the second pipe 122 approach each other, the impact force when the approaching ends of the first pipe 121 and the second pipe 122 collide with each other increases, so that vibrations occur between the first pipe 121 and the second pipe 122. When vibrating, the soil lumps bonded between the well wall and the drill pipe body 1 will be shaken off; so that the first pipe 121 and the second pipe 122 do not bond with the soil lumps, thereby reducing the probability of the drill pipe getting stuck;

[0042] And the drill pipe nozzles on the drill pipe body 1 are opened on the blocking ring 13, so that the water spray openings 131 on the drill pipe nozzles are parallel to the drill pipe body 1, the water inlet 132 is perpendicular to the drill pipe body 1, and the water inlet 132 is communicated with the inside of the drill pipe body 1, so that the mud on the ground can be pumped into the inside of the drill pipe body 1 from the mud pool, and then enter the water inlet 132. The mud enters the water spray opening 131 through the water inlet 132 and then is sprayed out through the water spray opening 131. The sprayed mud is sprayed out from both sides of the blocking ring 13, so as to lubricate the drill pipe body 1 and the drill bit; during the process of the mud being sprayed out from the water spray opening 131, the first pipe 121 and the second pipe 122 are in reciprocating motion; when the first pipe 121 and the second pipe 122 move away from each other, the ends of the first pipe 121 and the second pipe 122 that move away from each other will push the annular plate 136. After the annular plate 136 is pushed, the annular plate 136 will push one end of the plurality of cleaning rods 135 synchronously. After the cleaning rods 135 are pushed, the cleaning rods 135 will move towards the position of the water spray opening 131. As the first pipe 121 and the second pipe 122 continuously push the annular plate 136, the cleaning rods 135 will enter the water spray opening 131, so that the cleaning rods 135 protrude from the water spray opening 131. During the process of the cleaning rods 135 entering the water spray opening 131, the outer wall of the cleaning rods 135 will clean the inner wall of the water spray opening 131, so as to prevent the soil from being embedded in the water spray opening 131 when drilling the underground soil and blocking the water spray opening 131; resulting in the difficulty of the mud in the water spray opening 131 to be sprayed out, or the spraying amount to be reduced, resulting in insufficient lubrication of the drill pipe body 1 and the drill bit body, and further avoiding the problem of drill pipe jamming; when the first pipe 121 and the second pipe 122 are reset, the spring between the cleaning rod 135 and the fixed block 134 realizes the reset of the cleaning rod 135.

[0043] Embodiment 2:

[0044] As Figures 2 to 6 shown; the middle part of the cleaning rod 135 is hollow, and an opening is provided at one end of the cleaning rod 135 close to the blocking ring 13; a communication hole 137 is provided at the lower end of the cleaning rod 135, and an opening is provided on the outer side of the end of the cleaning rod 135 away from the communication hole 137, and when the cleaning rod 135 enters the inside of the water spray opening 131, the communication hole 137 is communicated with the water inlet 132.

[0045] The specific working process is as follows:

[0046] On the basis of the above-mentioned first embodiment, the middle part of the cleaning rod 135 is hollow, and an opening is provided at one end of the cleaning rod 135 close to the blocking ring 13. A communication hole 137 is provided at the lower end of the cleaning rod 135, and an opening is provided at one end of the cleaning rod 135 far from the communication hole 137. After the cleaning rod 135 enters the inside of the water spraying port 131, the communication hole 137 communicates with the water delivery port 132. On the basis of the above-mentioned embodiment, after the cleaning rod 135 enters the inside of the water spraying port 131, the water delivery port 132 on the lower side of the cleaning rod 135 communicates with the communication port at the lower end of the cleaning rod 135. The mud enters the inside of the cleaning rod 135 through the water delivery port 132 and then sprays out from the openings at both ends of the cleaning rod 135, realizing that while the cleaning rod 135 cleans the water spraying port 131, the mud can still spray out to lubricate the drill pipe body 1 and the drill bit at one end of the drill pipe body 1, and there will be no problem that when the cleaning rod 135 cleans the water spraying port 131, the mud cannot spray out, thereby avoiding the problem of poor lubrication effect caused by the inability of the mud to spray out; further avoiding the problem of sticking of the drill.

[0047] Embodiment Three:

[0048] As Figures 2 to 6 shown; when the cleaning rod 135 is located inside the fixing block 134, the opening at one end of the cleaning rod 135 close to the blocking ring 13, the communication hole 137, and the opening outside the end of the cleaning rod 135 far from the communication hole 137 are all located inside the fixing block 134;

[0049] The end of the cleaning rod 135 close to the blocking ring 13 is tapered.

[0050] The specific working process is as follows:

[0051] On the basis of the above-mentioned embodiment, when the cleaning rod 135 is located inside the fixing block 134, the opening at one end of the cleaning rod 135 close to the blocking ring 13, the communication hole 137, and the opening outside the end of the cleaning rod 135 far from the communication hole 137 are all located inside the fixing block 134, so that when the first pipe 121 and the second pipe 122 do not squeeze the annular plate 136, both ends of the cleaning rod 135 with two openings and the communication hole 137 are located inside the fixing block 134, so that no extra soil enters the openings and the communication hole 137 during the drilling process. And the end of the cleaning rod 135 close to the blocking ring 13 is tapered, so that when the cleaning rod 135 cleans the water spraying hole, the tapered cleaning hole is more likely to push out the soil inside the water spraying hole, and when the opening at the tapered end of the cleaning rod 135 sprays out the mud, it sprays out in a dispersed manner, improving the lubrication effect of the drill pipe.

[0052] Embodiment Four:

[0053] As Figures 1 to 5As shown; cutting blocks 14 are provided on the outer walls of the first pipe 121 and the second pipe 122 on the sliding pipe 12, and the cutting blocks 14 are spirally distributed; and the cutting blocks 14 on the first pipe 121 and the second pipe 122 are separated from each other;

[0054] Arc-shaped grooves 138 are formed on the outer walls of each of the blocking rings 13, and the arc-shaped grooves 138 are inclined, and the arc-shaped grooves 138 are not communicated with the water spray nozzles 131 and the water inlet nozzles 132.

[0055] The specific working process is as follows:

[0056] On the basis of the above embodiments, cutting blocks 14 are provided on the outer walls of the first pipe 121 and the second pipe 122 on the sliding rod. The cutting blocks 14 are spirally distributed, and the cutting blocks 14 on the first pipe 121 and the second pipe 122 are separated from each other. When the drill pipe body 1 rotates, the drill pipe body 1 will drive the cutting blocks 14 on the first pipe 121 and the second pipe 122 to rotate synchronously. When the cutting blocks 14 rotate, the cutting blocks 14 cut the well wall. In addition, arc-shaped grooves 138 are formed on the outer walls of the blocking rings 13. The arc-shaped grooves 138 are inclined, and the arc-shaped grooves 138 are not communicated with the water spray nozzles 131 and the water inlet nozzles 132. When the drill bit provided at the end of the drill pipe body 1 changes the drilling direction, the well wall of the drill hole will be bent. When the drill pipe body 1 moves to the well wall at the bent part, the drill pipe body 1 will contact the well wall. At this time, the first pipe 121 and the second pipe 122 continuously move away from and close to each other, so that friction is generated between the first pipe 121 and the second pipe 122 on the drill pipe body 1, so that the first pipe 121 and the second pipe 122 rub against the well wall at the bent part, and the cutting blocks 14 on the first pipe 121 and the second pipe 122 cut the well wall, so that the aperture of the well wall becomes larger, which can meet the passage of the drill pipe body 1, thereby avoiding the problem of sticking of the drill pipe body 1.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention; those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A wired transmission drill pipe for directional drilling in underground coal mines. The wired transmission drill pipe comprises a drill pipe body (1). The drill pipe body (1) is arranged as a hollow pipe, and a data transmission line, a connector, a central positioning device and a signal repeater are arranged inside the drill pipe body (1). Drill nozzles are provided on the outer walls at both ends of the drill pipe body (1). It is characterized in that, The drill pipe body (1) further includes: A strip-shaped slider (11), which is arranged on the outer wall of the middle part of the drill pipe body (1); A sliding pipe (12), which is slidably connected to the outer wall of the drill pipe body (1). A chute is provided on the inner wall of the sliding pipe (12), and the strip-shaped slider (11) is slidably connected inside the chute. There is a spring between the strip-shaped slider (11) and the chute; A blocking ring (13), which is fixedly arranged at both ends of the drill pipe body (1); The sliding pipe (12) is arranged in two sections. The sliding pipe (12) is divided into a first pipe (121) and a second pipe (122). An expansion device (123) is arranged between the first pipe (121) and the second pipe (122); A sliding rod is arranged between the first pipe (121) and the second pipe (122); The drill pipe nozzle is opened on the surface of the blocking ring (13). The drill pipe nozzle is divided into a water spraying port (131) and a water inlet port (132); The water spraying port (131) is parallel to the drill pipe body (1), the water inlet port (132) is perpendicular to the drill pipe body (1), and one end of the water inlet port (132) is communicated with the inside of the drill pipe body (1), and the other end is communicated with the middle part of the water spraying port (131); One end of the blocking ring (13) close to the middle part of the drill pipe body (1) is provided with a connecting plate (133), and one end of the connecting plate (133) far from the drill pipe body (1) is provided with a fixing block (134); A cleaning rod (135) is slidably connected inside the fixing block (134) through a spring. The cleaning rod (135) corresponds to the water spraying port (131); One end of the cleaning rod (135) far from the blocking ring (13) extends out of the fixing block (134), and a circular plate (136) is arranged at one ends of multiple cleaning rods (135) far from the fixing block (134).

2. The wired transmission drill pipe for underground directional drilling in coal mines according to claim 1, characterized in that: The middle part of the cleaning rod (135) is hollow. An opening is provided at one end of the cleaning rod (135) close to the blocking ring (13); A communication hole (137) is provided at the lower end of the cleaning rod (135), and an opening is provided on the outer side of one end of the cleaning rod (135) far from the communication hole (137). And after the cleaning rod (135) enters the water spraying port (131), the communication hole (137) is communicated with the water inlet port (132).

3. The wired transmission drill pipe for underground directional drilling in coal mines according to claim 2, characterized in that: When the cleaning rod (135) is located inside the fixing block (134), the opening at one end of the cleaning rod (135) close to the blocking ring (13), the communication hole (137), and the opening on the outer side of one end of the cleaning rod (135) far from the communication hole (137) are all located inside the fixing block (134).

4. The wired transmission drill pipe for underground directional drilling in coal mines according to claim 3, characterized in that; One end of the cleaning rod (135) close to the blocking ring (13) is tapered.

5. The wired transmission drill pipe for underground directional drilling in coal mines according to claim 1, characterized in that: Cutting blocks (14) are arranged on the outer walls of the first pipe (121) and the second pipe (122) of the sliding pipe (12). The cutting blocks (14) are spirally distributed; And the cutting blocks (14) on the first pipe (121) and the second pipe (122) are separated from each other.

6. The wired transmission drill pipe for underground directional drilling in coal mines according to claim 1, wherein: An arc-shaped groove (138) is formed in the outer wall of each of the blocking rings (13), and the arc-shaped groove (138) is inclined and not communicated with the water spraying port (131) and the water inlet port (132).

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