Deslagging device for reverse pull drilling

Abstract

The utility model relates to the technical field of drilling equipment, in particular to a deslagging device for reverse pull drilling. Comprising a drilling head and a connecting rod, the drilling head is in threaded connection with the connecting rod, a roller bit is adopted as the drilling head, a first connecting hole is formed in the center of the drilling head, three second connecting holes are distributed in gaps around the drilling head at equal intervals, the connecting rod is composed of an outer-layer sleeve, a middle-layer deslagging pipe and an inner-layer flushing pipe, the first connecting hole is communicated with the flushing pipe, and the second connecting hole is communicated with the inner-layer flushing pipe. The second connecting hole is communicated with a slag discharging pipe, the sleeve is in contact with the hole wall to provide support protection, the tail end of the flushing pipe is connected with an external water pump to supply water inwards, the tail end of the slag discharging pipe is connected with a power pump and a separation tank, and a spiral blocking piece is further arranged in the slag discharging pipe. When the slag discharging device for reverse pull drilling is used, large pressure can be applied to the interior of a manhole, rock debris flows and floats under the action of a flushing medium, secondary crushing and slag pumping and discharging are facilitated, and the slag discharging efficiency and the drilling efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a slag removal device for reverse pulling drilling. Background Art

[0002] Drilling holes in coal and rock masses is a key form of coal and rock removal. The depth and direction of drilling vary depending on the project's needs. Drilling methods vary, including forward circulation and reverse circulation, depending on the direction of drilling and the method of cuttings return. In forward circulation, the flushing medium flows at the bottom of the hole in the opposite direction of the core entering the core barrel, which can easily destroy and carry away some of the core. Reverse circulation, in contrast, protects the core and improves core recovery efficiency. When drilling large-diameter holes, the annular space between the outer wall of the drill pipe and the hole wall is large. With forward circulation, the flushing medium's return velocity is very low, making it difficult to completely remove cuttings. In reverse circulation, the flushing medium returns through the drill pipe at a higher velocity, providing a greater carrying capacity for cuttings, capable of even carrying pebbles with a diameter of approximately 100 mm out of the hole. However, in deep well drilling, the settling of cuttings particles reduces drilling and debris removal efficiency. Larger cuttings also require secondary crushing before further removal, resulting in inefficient drilling. Utility Model Content

[0003] The purpose of the utility model is to provide a slag discharge device for reverse pull drilling, which can apply greater pressure to the exploration hole when in use, so that the rock cuttings flow and float under the action of the flushing medium, which is convenient for secondary crushing and slag discharge, and improves the slag discharge and drilling efficiency.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a slag discharge device for reverse pulling drilling, comprising a drilling head and a connecting rod, the drilling head and the connecting rod are threadedly connected, the drilling head adopts a roller drill bit, a first connecting hole is opened in the center, and three second connecting holes are evenly distributed in the gaps around it, the connecting rod is composed of an outer casing, a middle slag discharge pipe and an inner flushing pipe, the first connecting hole is connected to the flushing pipe, the second connecting hole is connected to the slag discharge pipe, the casing is in contact with the hole wall to provide support and protection, the end of the flushing pipe is connected to an external water pump to supply water inward, the end of the slag discharge pipe is connected to a power pump and a separation tank, and a spiral baffle is also provided in the slag discharge pipe.

[0005] Furthermore, the lower end of the drilling head is provided with three gears, and the upper end shaft body is provided with a through hole, wherein the through hole is connected to the first connecting hole, and the second connecting hole is connected to the inner wall of the upper end of the through hole.

[0006] Furthermore, the flushing pipe is located at the center, the second connecting hole is connected to the gap between the flushing pipe and the slag discharge pipe, and the diameter of the slag discharge pipe is three times that of the flushing pipe.

[0007] Furthermore, a spray head is provided at the end of the first connecting hole, the lower end of the spray head is located in the middle of the drilling head, and spray holes are provided on the circumference of the spray head.

[0008] Furthermore, the lower end of the second connecting hole is obliquely arranged on the drilling head.

[0009] Furthermore, the end of the slag discharge pipe is provided with a connecting disc, a connecting bearing, a connecting pipe and a discharge port. The connecting bearing is fixed on the disc, which is connected to the connecting pipe through the connecting bearing, so that the slag discharge pipe and the connecting pipe are rotatably connected. A discharge port for discharging is opened on the wall of the connecting pipe, and a power pump is connected to the discharge port.

[0010] Furthermore, the power pump is electrically connected to an external power source.

[0011] The beneficial effects of the present invention are: 1) the present invention can provide a pressure cleaning medium to the drilling head through the inner flushing pipe, which can not only be used as a coolant, but also can flush the rock cuttings at the drilling site through the high-pressure fluid to make them flow. When the cleaning medium flows upward through the slag discharge pipe, it can drive the rock cuttings to be discharged at an accelerated rate. Under the extraction of the external power pump, the cleaning medium and rock cuttings are stored in the separation tank, which is convenient for solid-liquid separation, can improve the slag discharge and drilling efficiency, and has a simple structure and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 It is a left view of the utility model.

[0014] Figure 3 for Figure 1 Half-section view.

[0015] Figure 4 for Figure 3 Enlarged view of part A in .

[0016] Figure 5 for Figure 3 Enlarged view of part B in .

[0017] Figure 6 for Figure 3 Enlarged view of part C in .

[0018] In the figure: 1. Drilling head; 2. Connecting rod; 3. First connecting hole; 4. Second connecting hole; 5. Casing; 6. Slag discharge pipe; 7. Flushing pipe; 8. Power pump; 9. Separation tank; 10. Spiral baffle; 11. Through hole; 12. Connecting disc; 13. Connecting bearing; 14. Connecting pipe; 15. Discharge port. DETAILED DESCRIPTION

[0019] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0020] Embodiment: As shown in the figure, the utility model of a reverse pull drilling slag removal device includes:

[0021] The drilling head 1 and the connecting rod 2 are threadedly connected to each other. The drilling head 1 adopts a roller drill bit, a first connecting hole 3 is provided in the center, and three second connecting holes 4 are equidistantly distributed in the gaps around it. The connecting rod 2 is composed of an outer casing 5, a middle slag discharge pipe 6 and an inner flushing pipe 7. The first connecting hole 3 is connected to the flushing pipe 7, and the second connecting hole 4 is connected to the slag discharge pipe 6. The casing 5 contacts the hole wall to provide support and protection. The end of the flushing pipe 7 is connected to an external water pump to supply water inward. The end of the slag discharge pipe 6 is connected to a power pump 8 and a separation tank 9. A spiral baffle 10 is also provided in the slag discharge pipe 6. The spiral baffle 10 blocks half of the gap between the slag discharge pipe 6 and the flushing pipe 7, so that the water flow can form a spiral shape when passing through, thereby accelerating the flow. The water pump and the power pump 8 are driven externally. The water pump pumps water downward so that the water passes through the inner flushing pipe 7, the first connecting hole 3 and the through hole 11, and then reaches the drilling head 1 for cleaning. The power pump 8 discharges water upward so that the water at the drilling head 1 passes through the second connecting hole 4 and then is pumped upward through the middle slag discharge pipe 6 to be stored in the separation tank 9. During the water circulation process, the rock cuttings at the drilling head 1 will be washed and driven, so that they move with the water flow, thereby realizing the slag discharge function. During the process, the casing 5 is in contact with the hole wall to provide external protection to prevent the hole wall from collapsing. The middle slag discharge pipe 6 is used to transport water and rock cuttings upward, and the inner flushing pipe 7 is used to transport water for cleaning the drilling head 1 downward. When the water flow is pumped upward, the spiral baffle 10 can guide the water flow to form a vortex, thereby increasing the water flow rate and the efficiency of conveying rock cuttings.

[0022] The lower end of the drilling head 1 has three cones, and the upper end shaft is provided with a through hole 11. This through hole 11 communicates with the first connecting hole 3, and the second connecting hole 4 communicates with the inner wall above the through hole 11. Through hole 11 is centrally located at the center of the flushing pipe 7 and connects to the first connecting hole 3, allowing the water pump to direct water into the first connecting hole 3 when in operation. During the grinding operation, water can directly act on the cones to cool them and remove dust, and flush the moving rock chips to make them flow.

[0023] The flushing pipe 7 is located at the center, and the second connecting hole 4 is connected to the gap between the flushing pipe 7 and the slag discharge pipe 6 , and the diameter of the slag discharge pipe 6 is three times that of the flushing pipe 7 .

[0024] A spray head is also provided at the end of the first connecting hole 3. The lower end of the spray head is located in the middle of the drilling head 1, and spray holes are provided on the circumference of the spray head. The downward-flowing water is sprayed outward through the spray head and the spray holes to expand the flow range of the water flow, flushing and floating the surrounding rock debris, and causing the rock debris to circulate with the water flow.

[0025] The lower end of the second connecting hole 4 is tilted on the drilling head 1. When the drilling head 1 is in operation, the second connecting hole 4 is always tilted. When the power pump 8 is activated to draw water upward, the tilted hole can prevent rock debris from accumulating and blocking the second connecting hole 4. The three second connecting holes 4 can accelerate the flow circulation of water. Even if one of the holes is blocked, the circulation and slag removal can continue.

[0026] The end of the slag discharge pipe 6 is provided with a connecting disc 12, a connecting bearing 13, a connecting pipe 14 and a discharge port 15. The connecting bearing 13 is fixed on the disc, which is connected to the connecting pipe 14 through the connecting bearing 13, so that the slag discharge pipe 6 and the connecting pipe 14 are rotatably connected. A discharge port 15 for discharging is opened on the wall of the connecting pipe 14, and the discharge port 15 is connected to the power pump 8.

[0027] The power pump 8 is electrically connected to an external power supply, and the opening and closing of the power pump 8 is controlled by the external power supply. When it is turned on, the water flow can be pumped upward into the flow separation tank 9 for storage. After static sedimentation, the bottom is rock debris and the upper part is water. The water and rock debris can be discharged separately through the connecting ports at the upper and lower ends for classified processing.

[0028] The utility model can provide a pressure cleaning medium to the drilling head through the inner flushing pipe, which can not only be used as a coolant, but also can flush the rock cuttings at the drilling site to make them flow through the high-pressure fluid. When the cleaning medium flows upward through the slag discharge pipe, it can drive the rock cuttings to be discharged at an accelerated speed. Under the extraction of the external power pump, the cleaning medium and rock cuttings are stored in the separation tank, which is convenient for solid-liquid separation, can improve the slag discharge and drilling efficiency, and has a simple structure and is easy to use.

[0029] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A slag removal device for reverse drilling, characterized by: It includes a drilling head and a connecting rod, and the drilling head is threadedly connected to the connecting rod. The drilling head adopts a roller drill bit, a first connecting hole is opened in the center, and three second connecting holes are evenly distributed in the gaps around it. The connecting rod is composed of an outer casing, a middle slag discharge pipe and an inner flushing pipe. The first connecting hole is connected to the flushing pipe, and the second connecting hole is connected to the slag discharge pipe. The casing contacts the hole wall to provide support and protection. The end of the flushing pipe is connected to an external water pump to supply water inward, and the end of the slag discharge pipe is connected to a power pump and a separation tank. A spiral baffle is also provided in the slag discharge pipe.

2. A slag removal device for reverse drilling according to claim 1, characterized in that: The lower end of the drilling head is provided with three cones, and the upper end shaft body is provided with a through hole, wherein the through hole is communicated with the first connecting hole, and the second connecting hole is communicated with the inner wall of the upper end of the through hole.

3. The deslagging device for reverse drilling according to claim 1, characterized in that: The flushing pipe is located at the center, the second connecting hole is connected to the gap between the flushing pipe and the slag discharge pipe, and the diameter of the slag discharge pipe is three times that of the flushing pipe.

4. The deslagging device for reverse drilling according to claim 1, characterized in that: A spray head is also provided at the end of the first connecting hole. The lower end of the spray head is located in the middle of the drilling head, and spray holes are provided on the circumference of the spray head.

5. The deslagging device for reverse drilling according to claim 1, characterized in that: The lower end of the second connecting hole is obliquely arranged on the drilling head.

6. The deslagging device for reverse drilling according to claim 1, characterized in that: The end of the slag discharge pipe is provided with a connecting disc, a connecting bearing, a connecting pipe and a discharge port. The connecting bearing is fixed on the disc, which is connected to the connecting pipe through the connecting bearing, so that the slag discharge pipe and the connecting pipe are rotatably connected. A discharge port for discharging is opened on the wall of the connecting pipe, and the discharge port is connected to a power pump.

7. The deslagging device for reverse drilling according to claim 1, characterized in that: The power pump is electrically connected to an external power source.

Images