Gas box rotation stopping device for drilling machine

Abstract

The utility model discloses a gas box rotation stopping device for a drilling machine, which belongs to the technical field of geothermal well drilling and comprises two oppositely arranged T-shaped supports, floating lug plates are connected to the lower portions of the inner sides of the T-shaped supports, a split type hoop is arranged between the two floating lug plates, and the split type hoop and the floating lug plates are movably connected in the vertical direction. A tooth plate is arranged on the inner side of the split type hoop and used for clamping a gas box shell, and tooth plate stop pins are arranged on the split type hoop and located above and below the tooth plate. The air box clamping device is suitable for clamping an air box, the air box can be effectively prevented from rotating, the floating requirement of a power head is met, and the air box is clamped stably.

Description

Technical Field

[0001] The utility model relates to an air box rotation-stopping device for a drilling rig, belonging to the technical field of geothermal well drilling. Background Art

[0002] With the widespread utilization of geothermal resources, geothermal well drilling techniques and methods urgently need to be updated. Improving geothermal well construction efficiency and reducing geothermal well construction costs are key to geothermal well drilling and construction projects. In the exploration and development of deep bedrock geothermal resources, gas lift reverse circulation drilling (GLRCD) has become increasingly popular due to its advantages, including low energy consumption, clean bottomholes, high drilling efficiency, and reservoir protection. GLRCD uses compressed air injected into the drill string to reduce the fluid density within the drill string, thereby changing the pressure differential between the inner and outer fluid columns. This pressure differential allows drilling fluid to flow from the outer annulus of the drill string and return from the inner annulus. An air compressor pumps compressed air through a gas supply line, an air box, a double-walled active drill pipe, a double-walled drill pipe, and an air-water mixer into the inner tube of the double-walled drill pipe. The air mixes with the drilling fluid to form a mixed fluid with a lower density than the drilling fluid. Once the gas enters the inner tube of the double-walled drill pipe, it rises rapidly along the inner tube, creating a gas lift effect.

[0003] In the gas lift reverse circulation drilling process, the gas box serves as the air intake device for high-pressure air to enter the double-wall drill bit, and is an important component of the double-wall drill bit. At present, there is a lack of gas box anti-rotation matching devices suitable for drilling rigs on domestic construction sites. This problem has restricted the development of the gas lift reverse circulation drilling process to a certain extent. The fixing of the gas box on the construction site is often extensive. Generally, the gas box is clamped with an ordinary clamp and connected to the fixed part of the drilling rig through a connecting rod. This fixing device has the following defects: it has little effect on the anti-rotation of the gas box, and the back-and-forth rotation of the gas box drives the connecting rod to make a knocking noise; it cannot meet the floating requirements of the power head while the gas box is anti-rotating; the ordinary clamping device is not stable enough, and it is easy for the gas box to detach, resulting in immeasurable consequences. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an air box anti-rotation device for a drilling rig, which can effectively prevent the air box from rotating, and also meet the floating requirements of the power head and firmly clamp the air box.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A gas box anti-rotation device for a drilling rig comprises two T-shaped brackets arranged opposite to each other, a floating ear plate being connected to the lower inner portion of the T-shaped bracket, a split clamp being provided between the two floating ear plates, the split clamp being movably connected to the floating ear plates in the upper and lower directions, a tooth plate being provided on the inner side of the split clamp, the tooth plate being used to clamp the gas box outer shell, and a tooth plate stop pin being provided on the split clamp and above and below the tooth plate.

[0007] The cross bracing portion of the T-shaped bracket is provided with a supporting foot, and the supporting foot is fixed to the inner side of the power head ear plate through a pin shaft.

[0008] Ribs are provided on both sides of the main arm portion of the T-shaped bracket.

[0009] The T-shaped bracket and the floating ear plate are connected by welding.

[0010] The split clamp includes two semicircular parts arranged opposite to each other, connecting plates are provided on both sides of the semicircular parts, the floating ear plate is located between the two connecting plates, an oblong hole is opened on the floating ear plate along the vertical direction, and a bolt hole is opened on the connecting plate. The bolt passes through the two bolt holes and the oblong hole and is locked by a nut.

[0011] A gasket is provided between the inner side of the nut and the connecting plate.

[0012] A trapezoidal groove is provided on the inner wall of the split clamp, and the transverse cross-section of the tooth plate is trapezoidal. The tooth plate is installed in the trapezoidal groove, and a tooth surface is provided on the tooth plate. The tooth surface is higher than the inner wall of the split clamp, and pin holes for the tooth plate stop pin to pass through are respectively provided at the upper and lower positions in the trapezoidal groove.

[0013] The number of the tooth plates is N, where N is an integer greater than or equal to 3, and the tooth plates are evenly distributed along the inner ring of the split clamp.

[0014] The beneficial effects of the present invention: The present invention provides an air box anti-rotation device for a drilling rig. First, a double-supported T-shaped bracket replaces the traditional connecting rod structure, which can reduce the connection points and increase the integrity of the structure. The T-shaped bracket can be firmly fixed on the ear plates on both sides of the power head, providing a reliable limit to prevent the air box from rotating, ensuring that the air box achieves an ideal anti-rotation effect, and greatly reducing the impact noise generated by the connection gap. In addition, the floating ear plate leaves a margin for the floating of the power head to meet the floating requirements of the power head. Finally, the air box is clamped in the form of a split clamp. The split clamp meets the needs of convenient disassembly and installation during on-site construction. A tooth plate is provided in the split clamp, which is tightly pressed on the air box outer shell through the front and rear clamps. Compared with the traditional clamp, the clamping device greatly improves the reliability and reduces the risk of the air box falling or being thrown out. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of an air box anti-rotation device of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the T-shaped bracket and the floating ear plate in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the split clamp in the utility model;

[0018] Figure 4 This is a schematic structural diagram of the middle tooth plate of the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the split clamp and the tooth plate in the utility model;

[0020] The reference numerals in the figure are as follows: 1-T-shaped bracket; 2-floating ear plate; 3-split clamp; 4-tooth plate; 5-tooth plate stop pin; 11-support foot; 12-rib plate; 21-oblong hole; 31-trapezoidal groove; 32-pin hole; 33-connecting plate; 34-gasket; 35-bolt; 36-nut; 41-tooth surface. DETAILED DESCRIPTION

[0021] Example 1

[0022] like Figure 1 and Figure 5 As shown, the utility model discloses an air box anti-rotation device for a drilling rig, comprising two T-shaped brackets 1 arranged opposite to each other, which are used to connect with the ear plates of the power head, and provide a reliable limit to prevent the air box from rotating. A floating ear plate 2 is connected to the lower inner part of the T-shaped bracket 1, and a split clamp 3 is provided between the two floating ear plates 2. The split clamp 3 and the floating ear plate 2 are movably connected in the upper and lower directions to meet the floating requirements of the power head. A tooth plate 4 is provided on the inner side of the split clamp 3, and the tooth plate 4 is used to clamp the air box shell, and the clamping stability of the split clamp 3 is improved by the tooth plate 4. A tooth plate stop pin 5 is provided on the split clamp 3 and located above and below the tooth plate 4 to realize the upper and lower position fixing function of the tooth plate 4.

[0023] The utility model first replaces the traditional connecting rod structure with a double-supported T-shaped bracket. The T-shaped bracket can be firmly fixed on the ear plates on both sides of the power head, providing a reliable limit to prevent the air box from rotating, ensuring that the air box achieves an ideal anti-rotation effect. In addition, the floating ear plate leaves a margin for the floating of the power head to meet the floating requirements of the power head. Finally, the air box is clamped in the form of a split clamp. The split clamp meets the needs of convenient disassembly and installation during on-site construction. A tooth plate is provided in the split clamp, which is tightly pressed on the air box outer shell through the front and rear clamps. Compared with the traditional clamp, the clamping device greatly improves reliability, avoids the air box from detaching, and can effectively reduce the risk of accidents.

[0024] Example 2

[0025] like Figure 1 and Figure 5 As shown, the utility model discloses a gas box anti-rotation device for drilling rigs, comprising two T-shaped brackets 1 arranged opposite to each other, which has the advantages of being stable and reliable while also adapting to the spatial structure of the power head ear plate. Figure 2 As shown, the cross brace of the T-shaped bracket 1 is equipped with support legs 11, which are fixed to the inner side of the power head lug via pins. The double-braced T-shaped structure provides a reliable stop and fixed point to prevent the gas box housing from rotating, while also reserving installation space for the power head lug pin. Ribs 12 are installed on both sides of the main arm of the T-shaped bracket 1 to strengthen it.

[0026] The lower inner part of the T-shaped bracket 1 is connected to the floating lug plate 2, and the T-shaped bracket 1 and the floating lug plate 2 are welded together. Figure 2 As shown, the floating ear plate 2 is provided with an oblong hole 21 in the vertical direction to provide left and right limit for rotation and reserve space for the floating power head. A split clamp 3 is provided between the two floating ear plates 2. The split clamp 3 is movably connected to the floating ear plate 2 in the vertical direction to meet the floating requirements of the power head. Figure 3 As shown, the split clamp 3 comprises two opposing semicircular portions, ensuring easy disassembly during on-site construction. Connecting plates 33 are located on either side of the semicircular portions. The floating lug 2 is positioned between the two connecting plates 33. The connecting plates 33 are provided with bolt holes. Bolts 35 pass through the two bolt holes and the oblong hole 21 before being secured with nuts 36. A gasket 34 is positioned between the inner side of the nut 36 and the connecting plates 33.

[0027] The inner side of the split clamp 3 is provided with a tooth plate 4, and the number of the tooth plates 4 is N, where N is an integer greater than or equal to 3. The tooth plates 4 are evenly distributed along the inner ring of the split clamp 3. In this embodiment, the tooth plates 4 are specifically selected to be 5. The tooth plates 4 are used to clamp the gas box shell, and the tooth plates 4 improve the clamping stability of the split clamp 3. In order to solve the problem that the clamping device is easy to wear and frequently replaced, Figure 3As shown, the inner wall of the split clamp 3 is provided with a trapezoidal groove 31, the transverse cross section of the tooth plate 4 is trapezoidal, and the tooth plate 4 is embedded in the trapezoidal groove 31, as shown in FIG. Figure 4 As shown, the tooth plate 4 is provided with a tooth surface 41, which is slightly higher than the inner wall of the split clamp 3, so that the tooth plate 4 can be pressed by the front and rear clamps.

[0028] like Figure 3 and Figure 5 As shown, the split clamp 3 is provided with a tooth plate stop pin 5 located above and below the tooth plate 4. Pin holes 32 for the tooth plate stop pin 5 are provided at the upper and lower positions of the trapezoidal groove 31, respectively, to secure the upper and lower positions of the tooth plate 4. When the tooth plate 4 is worn and the clamping becomes loose, only the tooth plate 4 needs to be replaced in a timely manner, reducing construction costs.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A drilling rig air box anti-rotation device, characterized by: The invention comprises two T-shaped brackets (1) arranged opposite to each other, wherein the inner lower part of the T-shaped bracket (1) is connected to a floating ear plate (2), a split clamp (3) is arranged between the two floating ear plates (2), the split clamp (3) and the floating ear plates (2) are movably connected in the upper and lower directions, a tooth plate (4) is arranged on the inner side of the split clamp (3), and the tooth plate (4) is used to clamp the gas box shell, and a tooth plate stop pin (5) is arranged on the split clamp (3) and located above and below the tooth plate (4).

2. The drilling rig air box anti-rotation device according to claim 1, characterized in that: The cross bracing portion of the T-shaped bracket (1) is provided with a support foot (11), and the support foot (11) is fixed to the inner side of the power head ear plate via a pin shaft.

3. The drilling rig air box anti-rotation device according to claim 1, characterized in that: Rib plates (12) are provided on both sides of the main arm portion of the T-shaped bracket (1).

4. The drilling rig air box anti-rotation device according to claim 1, characterized in that: The T-shaped bracket (1) and the floating lug plate (2) are connected by welding.

5. The drilling rig air box anti-rotation device according to claim 1, characterized in that: The split hoop (3) comprises two semicircular portions arranged opposite to each other, connecting plates (33) are provided on both sides of the semicircular portions, the floating ear plate (2) is located between the two connecting plates (33), an oblong hole (21) is provided on the floating ear plate (2) along the vertical direction, and a bolt hole is provided on the connecting plate (33), and a bolt (35) is passed through the two bolt holes and the oblong hole (21) and then locked by a nut (36).

6. The drilling rig air box anti-rotation device according to claim 5, characterized in that: A gasket (34) is provided between the inner side of the nut (36) and the connecting plate (33).

7. The drilling rig air box anti-rotation device according to claim 1, characterized in that: The inner wall of the split clamp (3) is provided with a trapezoidal groove (31), the transverse cross section of the tooth plate (4) is trapezoidal, the tooth plate (4) is installed in the trapezoidal groove (31), the tooth plate (4) is provided with a tooth surface (41), the tooth surface (41) is higher than the inner wall of the split clamp (3), and pin holes (32) for the tooth plate stop pin (5) to pass through are respectively provided at upper and lower positions in the trapezoidal groove (31).

8. The drilling rig air box anti-rotation device according to claim 1, characterized in that: The number of the tooth plates (4) is N, where N is an integer greater than or equal to 3, and the tooth plates (4) are evenly distributed along the inner ring of the split clamp (3).

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