Directional drilling rig water kick prevention device

Abstract

The utility model relates to the technical field of coal mine underground directional drilling machine construction, specifically relates to a kind of water is prevented from being shot device of directional drilling machine;Including fixed seat, the fixed seat is U type, and reel mechanism is installed in fixed seat, and the reel mechanism includes the cylindrical shell installed in fixed seat, and the inside of cylindrical shell is installed with rotating shaft, and safety belt is wound on rotating shaft, and the end of safety belt extends outside the cylindrical shell of reel mechanism, and closed loop hook is provided at end portion;The both ends of rotating shaft respectively extend fixed seat side wall, and reel structure is installed in the end portion of one end, and locking mechanism is installed in the end portion of other end;The utility model is around the safety work needs in the construction process of coal mine underground directional drilling, water is fixed to the tail of drilling machine platform by safety belt, through locking mechanism, the range can be effectively controlled when water is shot in opposite direction momentarily, and the safety of on-site operator is protected to the maximum extent.

Description

Technical Field

[0001] This utility model relates to the field of directional drilling technology in coal mines, specifically to a water jet prevention device for directional drilling rigs. Background Technology

[0002] Directional drilling for pre-drainage of coal seam gas is a common regional gas control measure. During directional drilling, a pump truck is typically used to pressurize the flushing fluid (clean water) to flush away coal slag and cool the drill bit. Under normal circumstances, coal slag is discharged from the borehole along with the flushing fluid (clean water), and drainage and slag removal within the borehole are unobstructed. However, in daily production, factors such as coal seam structure, water flow erosion during drilling, and drill bit disturbance often lead to borehole collapse and blockage, resulting in obstructed slag removal channels and pressure buildup within the borehole. This causes a continuous increase in water pressure. In addition, after prolonged use, the threads of the water jet wear down, weakening the connection between the water jet and the drill rod, and the lack of an interlocking device between them. Under high pressure, the water jet can easily disengage and shoot out in the opposite direction, potentially injuring on-site personnel and posing a significant safety hazard. Summary of the Invention

[0003] This invention addresses the technical problem of water jet ejection from directional drilling rigs due to continuously increasing water pressure during construction, by providing a water jet anti-jet device for directional drilling rigs.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a water jet prevention device for directional drilling rigs, including a fixed base, the fixed base being U-shaped, the fixed base including a base plate, the left and right ends of the base plate respectively being fixed with mutually parallel vertical plates, a winding mechanism installed between the two vertical plates, the winding mechanism including a columnar shell installed between the two vertical plates, a rotating shaft installed inside the columnar shell, a safety webbing wound on the rotating shaft, the end of the safety webbing extending out of the outside of the columnar shell of the winding mechanism, and a closed-loop hook provided at the end; the two ends of the rotating shaft respectively extending out of the adjacent vertical plates, and a winding structure for storing and controlling the winding and stretching of the safety webbing is installed at one end, and a locking mechanism for controlling the safety webbing to stop instantly under rapid stretching action is installed at the other end.

[0005] The mounting base secures the winding mechanism to the tail of the drilling rig platform with fixing bolts, and the two are connected by a closed-loop hook at the end of the safety webbing to a nut welded to the water pipe. During the uniform advance and retraction of the drill rod, the safety webbing gradually winds up or pulls out of the winding mechanism along with the water pipe. When the water pipe disengages and detaches from the drill rod tail at high speed, the locking device locks instantly to prevent the water pipe from being thrown out uncontrollably.

[0006] Furthermore, the winding structure includes a spiral reel, one end of which extends into the cylindrical housing and is fixed to the shaft, and the end located at the edge of the reel is fixed to the outer wall of the adjacent vertical plate.

[0007] Furthermore, the locking mechanism includes a base installed on the outside of the vertical plate, a gear ring installed inside the base, teeth on the inner side of the gear ring, a support rod and an eccentric gear ring coaxially rotating with the rotating shaft inside the gear ring, the center of the support rod being detachably connected to the rotating shaft, and the support rod being perpendicular to the rotating shaft, the eccentric gear ring having a protrusion on one side and a groove on the other side inside, the support rod being engaged at both ends at the protrusion and groove respectively when rotating at a constant speed; when suddenly changing speed, the eccentric gear ring moves radially along the gear ring, and teeth are provided on the outer side of the eccentric gear ring along the direction of movement.

[0008] Furthermore, the locking mechanism includes a mounting base installed on the outside of the vertical plate. An external gear ring is installed inside the mounting base. The inner ring of the external gear ring has teeth. The external gear ring also has an eccentric pawl ring and a collar that rotate coaxially with the rotating shaft. The collar is coaxially connected to the rotating shaft. The eccentric pawl ring is sleeved on the outside of the collar, and the edge of the collar has a notch. The inner ring of the eccentric pawl ring has a locking protrusion. The locking protrusion is precisely engaged at the edge of the notch of the collar, so that the eccentric pawl ring rotates together with the collar.

[0009] Furthermore, the mounting base is provided with bolt holes.

[0010] Compared with the prior art, the present invention has the following beneficial effects: This utility model addresses the safety requirements during directional drilling in coal mines. It uses safety webbing to fix the water jet to the tail of the drilling platform and employs a locking mechanism to effectively control the range of the water jet when it is ejected in the opposite direction, thus maximizing the safety of on-site workers. Attached Figure Description

[0011] Figure 1 This is one of the schematic diagrams of the water jet prevention device for directional drilling rigs of this utility model.

[0012] Figure 2 This is the second schematic diagram of the water jet prevention device for directional drilling rigs of this utility model.

[0013] Figure 3 This is a schematic diagram of the water jet anti-jet device for directional drilling rigs installed on the drilling platform.

[0014] Figure 4 This is a schematic diagram of the winding structure in a relaxed state.

[0015] Figure 5 This is a schematic diagram of the winding structure under tension.

[0016] Figure 6 This is a schematic diagram of the internal structure of the locking mechanism.

[0017] The markings in the image are as follows: 1. Fixed base; 1-1. Base plate; 1-2. Vertical plate; 2. Winding mechanism; 3. Safety webbing; 4. Winding structure; 5. Locking mechanism; 5-1. Base; 5-2. Gear ring; 5-3. Support rod; 5-4. Eccentric gear ring; 5-5. External gear ring; 5-6. Eccentric pawl ring; 5-7. Collar; 5-8. Snap pin; 6. Water pipe; 7. Drill rod; 8. Drilling platform; 9. Front column; 10. Drilling rig holder; 11. Drilling rig power head; 12. Drilling rig tracks; 13. Water pipe; 14. Drill bit; 15. Rear column; 16. Motor. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments. Example 1

[0019] like Figure 1 and 2 As shown, a water jetting prevention device for a directional drilling rig includes a fixed base 1, which is U-shaped. The fixed base 1 includes a base plate 1-1, and parallel vertical plates 1-2 are fixed to the left and right ends of the base plate, respectively. A winding mechanism 2 is installed between the two vertical plates 1-2. The winding mechanism 2 includes a columnar shell installed between the two vertical plates 1-2. A rotating shaft is installed inside the columnar shell. A safety webbing 3 is wound on the rotating shaft. The end of the safety webbing 3 extends out of the columnar shell of the winding mechanism and is provided with a closed-loop hook at the end. The two ends of the rotating shaft extend out of the adjacent vertical plates 1-2, and a winding structure 4 for storing and controlling the winding and stretching of the safety webbing 3 is installed at one end. A locking mechanism 5 for controlling the safety webbing 3 to stop instantly under rapid stretching is installed at the other end.

[0020] Furthermore, the winding structure 4 includes a spiral reel, one end of which extends into the cylindrical housing and is fixed to the shaft, and the other end located at the edge of the reel is fixed to the outer wall of the adjacent vertical plate 1-2. During the gradual stretching of the safety webbing 3, the winding structure 4 gradually tightens, reaching a tensioned state after being fully stretched. During the gradual winding of the safety webbing 3, the winding structure 4 gradually relaxes, reaching a relaxed state after being fully wound.

[0021] Furthermore, such as Figure 2As shown, the locking mechanism 5 includes a base 5-1 installed on the outside of the vertical plate 1-2. A gear ring 5-2 is installed inside the base 5-1. The inner ring of the gear ring 5-2 has teeth. Inside the gear ring 5-2, there is a support rod 5-3 and an eccentric gear ring 5-4 that rotate coaxially with the rotating shaft. The center of the support rod 5-3 is detachably connected to the rotating shaft, and the support rod 5-3 is perpendicular to the rotating shaft. The eccentric gear ring 5-4 has a protrusion on one side and a groove on the other side. When the support rod 5-3 rotates at a constant speed, its two ends are respectively locked in the protrusion and the groove. When the speed suddenly changes, the eccentric gear ring 5-4 moves radially along the gear ring 5-2. The outer side of the eccentric gear ring 5-4 has teeth along the direction of movement.

[0022] During the uniform forward and backward movement of the drill pipe, the safety webbing 3 is uniformly wound or stretched from the winding structure 4 along with the water flow 6. The eccentric gear ring 5-4 rotates at a uniform speed and does not mesh with the surrounding teeth, nor does it perform a locking action. After the water flow 6 is disengaged under the action of high-pressure water, it moves away from the tail of the drill pipe at high speed. The safety webbing 4 is rapidly pulled out from the winding mechanism 3 along with the water flow 6. The eccentric gear of the locking device 9 rotates at high speed. Under the action of centrifugal force, the eccentric gear ring 5-4 moves radially along the gear ring 5-2, performs centrifugal motion, and meshes with the inner teeth of the gear ring 5-2 to lock, causing the stretching action of the safety webbing 4 to stop instantly.

[0023] Furthermore, such as Figure 6 As shown, another locking mechanism 5 is provided, which also includes a mounting base installed on the outside of the vertical plate 1-2. An external gear ring 5-5 is installed inside the mounting base. The inner ring of the external gear ring 5-5 is provided with teeth. The external gear ring 5-5 is also provided with an eccentric pawl ring 5-6 and a collar 5-7 that rotate coaxially with the rotating shaft. The collar 5-7 is coaxially connected to the rotating shaft. The eccentric pawl ring 5-6 is sleeved on the outside of the collar 5-7, and the edge of the collar 5-7 has a notch. The inner ring of the eccentric pawl ring 5-6 is provided with a locking protrusion 5-8. The locking protrusion 5-8 is precisely locked at the edge of the notch of the collar 5-7, so that the eccentric pawl ring 5-6 rotates together with the collar 5-7.

[0024] During the uniform forward and backward movement of the drill pipe, the safety webbing 3 is uniformly wound or stretched from the winding structure 4 along with the water flow 6. The eccentric pawl ring 5-5 and the collar 5-7 rotate at a uniform speed and do not mesh with the inner teeth of the outer gear ring 5-5, thus not performing a locking action. The eccentric pawl ring 5-6 is an eccentric wheel. When the locking protrusion 5-8 is precisely locked at the edge of the notch of the collar 5-7, the pawl ring 11, during its rotation, does not contact the inner teeth of the outer gear ring 5-5. After the water flow 6 is disengaged under the action of high-pressure water, it moves away from the tail of the drill pipe at high speed. As the water flows, the safety webbing 3 is rapidly pulled out from the winding mechanism 3. The eccentric pawl ring 5-6 of the locking mechanism 5 is subjected to centripetal force, and the locking protrusion 5-8 moves radially along the collar 5-7. Due to the radial displacement of the locking protrusion 5-8 along the radius of the collar 5-7, 5-813 is engaged with the inner side of the notch of the collar 5-7. The pawl of the eccentric pawl ring 5-6 is also engaged by the inner teeth of the outer tooth ring 5-5 due to the radial offset, and engages with the inner teeth of 5-5 to lock, causing the stretching action of the safety webbing 3 to stop instantly.

[0025] Furthermore, the fixing base 1 has bolt holes.

[0026] Working process and materials: As shown in the figure, the fixed base 1 fixes the winding mechanism 2 to the tail of the drilling platform 8 with fixing bolts, and connects the two with the nut welded on the water tank 6 through the closed loop hook at the end of the safety webbing 3, forming an effective physical connection between the water tank 6 and the drilling platform 5.

[0027] During drilling, as the drill rod 7 moves forward and backward at a constant speed, the safety webbing 3 is uniformly wound or stretched from the winding structure 4 along with the water flow (e.g., ...). Figure 4 and 5 When the water is wound into position, it is in a relaxed state; when it is stretched into position, it is in a tense state. When the water collapses or blocks the hole, causing poor slag discharge and resulting in pressure buildup, the water pressure gradually increases. When it reaches a certain level, the water sluice 6 will instantly detach from the tail of the drill rod 7 and be ejected at high speed in the opposite direction. When the safety webbing 3 is rapidly pulled out of the winding structure 4 along with the water sluice 6, the locking mechanism 5 rotates at high speed. Under the action of centrifugal force, the eccentric gear ring 5-4 moves radially to perform centrifugal motion (or the eccentric pawl ring 5-5 moves radially to perform centrifugal motion), meshes with the adjacent internal teeth and locks, causing the stretching action of the safety webbing 3 to stop instantly, effectively limiting the ejection distance and the range of influence of the water sluice.

[0028] The water jet anti-jet device for directional drilling rigs functions through the following steps: Step 1: After the water pipe 6 is disengaged under the action of high pressure water, it moves away from the tail of the drill pipe at high speed, and at the same time drives the safety webbing 3 to move at the same speed.

[0029] Step 2: The safety webbing 3 is rapidly pulled out from the winding structure 4 along with the water flow 6, which drives the eccentric gear ring of the locking mechanism 5 to rotate at high speed. Under the action of centrifugal force, the eccentric gear ring performs centrifugal motion, meshes with the surrounding teeth and locks, causing the stretching action of the safety webbing 3 to stop instantly.

[0030] Step 3: Affected by the movement of the safety webbing 3, the water jet 6 stops spraying instantly and retracts under the action of inertia, effectively controlling and limiting the spraying range of the water jet 6 and protecting the safety of on-site workers to the greatest extent.

Claims

1. A water jet anti-jet device for directional drilling rigs, characterized in that, The device includes a fixed base (1), which is U-shaped. The fixed base (1) includes a base plate (1-1), and two parallel vertical plates (1-2) are fixed to the left and right ends of the base plate respectively. A winding mechanism (2) is installed between the two vertical plates (1-2). The winding mechanism (2) includes a columnar shell installed between the two vertical plates (1-2). A rotating shaft is installed inside the columnar shell. A safety webbing (3) is wound on the rotating shaft. The end of the safety webbing (3) extends out of the columnar shell of the winding mechanism and is provided with a closed-loop hook at the end. The two ends of the rotating shaft extend out of the adjacent vertical plates (1-2) respectively. A winding structure (4) for storing and controlling the winding and stretching of the safety webbing (3) is installed at one end, and a locking mechanism (5) for controlling the safety webbing (3) to stop instantly under rapid stretching is installed at the other end.

2. The anti-jet device for water jetting in a directional drilling rig according to claim 1, characterized in that, The winding structure (4) includes a spiral reel, one end of which extends into the cylindrical housing and is fixed to the shaft, and the end of which is located at the edge of the reel is fixed to the outer wall of the adjacent vertical plate (1-2).

3. The anti-jet device for water jetting in a directional drilling rig according to claim 1, characterized in that, The locking mechanism (5) includes a base (5-1) installed on the outside of the vertical plate (1-2). A gear ring (5-2) is installed inside the base (5-1). The inner ring of the gear ring (5-2) is provided with teeth. Inside the gear ring (5-2) are a support rod (5-3) and an eccentric gear ring (5-4) that rotate coaxially with the rotating shaft. The center of the support rod (5-3) is detachably connected to the rotating shaft, and the support rod (5-3) is perpendicular to the rotating shaft. The eccentric gear ring (5-4) has a protrusion on one side and a groove on the other side. When the support rod (5-3) rotates at a constant speed, both ends are respectively locked in the protrusion and the groove. When the speed suddenly changes, the eccentric gear ring (5-4) moves radially along the gear ring (5-2). The outer side of the eccentric gear ring (5-4) is provided with teeth along the direction of movement.

4. The anti-jet device for water jetting in a directional drilling rig according to claim 1, characterized in that, The locking mechanism (5) includes a mounting base installed on the outside of the vertical plate (1-2). An external gear ring (5-5) is installed inside the mounting base. The inner ring of the external gear ring (5-5) is provided with teeth. The external gear ring (5-5) is also provided with an eccentric pawl ring (5-6) and a collar (5-7) that rotate coaxially with the rotating shaft. The collar (5-7) is coaxially connected to the rotating shaft. The eccentric pawl ring (5-6) is sleeved on the outside of the collar (5-7), and a notch is opened on the edge of the collar (5-7). The inner ring of the eccentric pawl ring (5-6) is provided with a locking protrusion (5-8). The locking protrusion (5-8) is precisely locked at the edge of the notch of the collar (5-7), so that the eccentric pawl ring (5-6) rotates together with the collar (5-7).

5. The anti-jet device for water jetting in a directional drilling rig according to claim 1, characterized in that, The fixing seat (1) has bolt holes.

Images