Casing pressurizing device and rotary drilling equipment

Abstract

The utility model discloses a casing pressurizing device and rotary excavating drilling equipment, and relates to the technical field of rotary excavating drilling, and the casing pressurizing device comprises a drill rod connecting assembly and a casing connecting assembly. Wherein the drill rod connecting assembly comprises a connecting shaft and a connecting box connected with the connecting shaft, and the connecting box is used for being connected with a drill rod; the sleeve connecting assembly comprises a shaft sleeve and a connecting cylinder connected with the shaft sleeve, the shaft sleeve can be rotationally connected with the connecting shaft, and the connecting cylinder is used for being connected with a sleeve. The casing pressurizing device solves the problem that a casing is difficult to drill downwards or the drilling speed is too low.

Description

Technical Field

[0001] This application relates to the field of rotary drilling technology, and in particular to a casing pressurization device and rotary drilling equipment. Background Technology

[0002] Currently, rotary drilling is widely used as an efficient and high-quality drilling method.

[0003] In the existing system, the casing rolling machine, as an auxiliary equipment for rotary drilling rigs, plays an important role in the construction of rotary drilling rigs. It is mainly used for the sinking and pulling of casing in unstable strata. It drives the casing to rotate in both directions by outputting torque. Under the combined action of the casing's own weight and the casing rolling machine, the casing is drilled downwards. At the same time, it works with the drill bit of the rotary drilling rig to excavate the soil to form pile holes.

[0004] However, when the casing rolling machine and rotary drilling rig work together, the resistance during casing lowering increases with the depth of casing lowering and the hardness of the formation. Although the torque of the casing rolling machine can meet the requirements, the downward pressure generated by the casing and the casing rolling machine together will not be enough to overcome the resistance, causing the casing to be difficult to drill downwards or the drilling speed to be too slow, even though it can rotate in both directions. This limits the efficiency and depth of casing lowering. Utility Model Content

[0005] The purpose of this application is to provide a casing pressurization device and a rotary drilling equipment, which solves the problems of casing being difficult to drill downwards or drilling speed being too slow.

[0006] To achieve the above objectives, this application provides a casing pressurization device, comprising:

[0007] A drill pipe connection assembly includes a connecting shaft and a connecting box connected to the connecting shaft, the connecting box being used to connect the drill pipe;

[0008] A sleeve connection assembly includes a bushing and a connecting sleeve connected to the bushing. The bushing is rotatably connected to a connecting shaft, and the connecting sleeve is used to connect the sleeve.

[0009] In some embodiments, the connecting box is a square box, which includes two first side plates arranged opposite each other along a first direction and two second side plates arranged opposite each other along a second direction to form a insertion cavity for inserting drill rods, wherein the first direction is perpendicular to the second direction.

[0010] In some embodiments, the drill pipe connection assembly further includes:

[0011] A connecting plate is located at the end of the connecting box furthest from the connecting shaft.

[0012] The first stiffening plate is located between the connecting plate and the connecting shaft, and is connected to the outer wall of the connecting box.

[0013] In some embodiments, the connecting shaft includes a shaft body and a plate body disposed at one end of the shaft body near the connecting box. The size of the plate body in the plane containing the first direction and the second direction is larger than the size of the shaft body in the plane containing the first direction and the second direction. The first stiffener and the connecting box are both welded to the plate body.

[0014] In some embodiments, the end of the shaft away from the plate is provided with an external threaded surface, and the sleeve pressurizing device further includes a locking nut, which is threadedly engaged with the external threaded surface to axially limit the bushing.

[0015] In some embodiments, the sleeve connection assembly further includes:

[0016] A connecting ring plate connects the bushing and the connecting cylinder;

[0017] The second stiffening plate is located between the bushing and the connecting cylinder and is connected to the connecting ring plate.

[0018] In some embodiments, the sleeve pressurization device further includes at least two connecting pins, and the connecting cylinder is provided with at least two connecting holes. The connecting pins are fitted into the corresponding connecting holes and are used to connect with the sleeve.

[0019] In some embodiments, the connecting shaft is rotatably connected to the bushing via a bearing, and a sealing structure is provided between the connecting shaft and the bushing to prevent external impurities from entering between the connecting shaft and the bushing.

[0020] In some embodiments, the inner wall of the connecting cylinder is provided with a guide structure for engaging with the outer wall of the sleeve, the guide structure being used to guide the sleeve to connect to the connecting cylinder.

[0021] This application also provides a rotary drilling equipment, including a rotary drilling rig and a casing rubbing machine. The rotary drilling rig includes a power head and a drill rod. The casing rubbing machine is connected to the rotary drilling rig and is used to drive the casing to rotate. It also includes a casing pressurization device, which is connected to the drill rod and the casing to transmit the pressure provided by the power head to the drill rod to the casing.

[0022] Compared to the background technology described above, the casing pressurization device provided in this application includes a drill pipe connection assembly and a casing connection assembly. The drill pipe connection assembly includes a connecting shaft and a connecting box connected to the connecting shaft; the connecting box is used to connect the drill pipe. The casing connection assembly includes a bushing and a connecting sleeve connected to the bushing; the bushing is rotatably connected to the connecting shaft, and the connecting sleeve is used to connect the casing.

[0023] By setting up a casing pressurization device, on the one hand, the drill rod connection assembly and the casing connection assembly are connected to the drill rod and the casing respectively. This allows the downward pressure applied to the drill rod by the rotary drilling rig to be transmitted to the casing pressurization device, which then transmits the downward pressure to the casing, increasing the downward pressure on the casing and thus increasing the construction efficiency and depth of the casing rolling machine. On the other hand, since the rotation speed of the rotary drilling rig's power head and the casing rolling machine cannot be synchronized, the drill rod connection assembly and the casing connection assembly are rotatably connected to achieve relative rotation between the two. This ensures that while the rotary drilling rig transmits downward pressure, the torque output by the casing rolling machine is not transmitted to the drill rod, protecting the power head from damage due to torque caused by asynchronous rotation speed. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the casing pressurization device in the embodiments of this application;

[0026] Figure 2 for Figure 1 A schematic diagram of the drill pipe connection assembly in the casing pressurization device is shown.

[0027] Figure 3 for Figure 1 A schematic diagram of the sleeve connection assembly in the sleeve pressurization device is shown.

[0028] Figure 4 This is a schematic diagram of the rotary drilling equipment in the embodiments of this application.

[0029] in:

[0030] 1-Rotary drilling rig, 11-Power head, 12-Drill rod, 13-Pin shaft;

[0031] 2-Casing pressurization device, 20-Drill pipe connection assembly, 201-Connecting plate, 202-First side plate, 203-Second side plate, 204-First stiffening plate, 205-Connecting shaft, 21-Bearing, 22-Casing connection assembly, 221-Shaft sleeve, 222-Second stiffening plate, 223-Connecting ring plate, 224-Connecting cylinder, 23-Locking nut, 24-Connecting pin;

[0032] 3- Pipe rolling machine, 31- Sleeve. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] It should be noted that the directional terms such as "upper end," "lower end," "left side," and "right side" mentioned below are defined based on the accompanying drawings in the instruction manual.

[0036] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the casing pressurization device in the embodiments of this application; Figure 2 for Figure 1 A schematic diagram of the drill pipe connection assembly in the casing pressurization device is shown. Figure 3 for Figure 1 A schematic diagram of the sleeve connection assembly in the sleeve pressurization device is shown. Figure 4 This is a schematic diagram of the rotary drilling equipment in the embodiments of this application.

[0037] The casing pressurization device 2 provided in this application embodiment includes a drill pipe connection assembly 20 and a casing connection assembly 22.

[0038] The drill pipe connection assembly 20 includes a connecting shaft 205 and a connecting box connected to the connecting shaft 205. The connecting box is used to connect the drill pipe 12, and the connecting shaft 205 is used to connect the casing connection assembly 22.

[0039] The sleeve connection assembly 22 includes a bushing 221 and a connecting sleeve 224 connected to the bushing 221. The bushing 221 can be rotatably connected to the connecting shaft 205, while the connecting sleeve 224 is used to connect the sleeve 31.

[0040] On the one hand, the drill rod connecting assembly 20 and the casing connecting assembly 22 are respectively connected to the drill rod 12 and the casing 31. This allows the downward pressure applied to the drill rod 12 by the rotary drilling rig 1 to be transmitted to the casing pressurizing device 2. The casing pressurizing device 2 then transmits the downward pressure to the casing 31, increasing the downward pressure on the lower casing 31, thereby increasing the construction efficiency and depth of the casing 31 lowered by the casing rolling machine 3.

[0041] On the other hand, since the rotation speeds of the power head 11 of the rotary drilling rig 1 and the pipe rolling machine 3 are not synchronized, the drill rod connecting assembly 20 and the casing connecting assembly 22 are rotatably connected to achieve relative rotation between the two. This ensures that while the rotary drilling rig 1 transmits downward pressure, the torque output by the pipe rolling machine 3 will not be transmitted to the drill rod 12, thus protecting the power head 11 from damage due to torque caused by asynchronous rotation speeds.

[0042] In some embodiments, the connecting shaft 205 is rotatably connected to the bushing 221 via the bearing 21, the inner ring of the bearing 21 is fixed to the connecting shaft 205, and the outer ring of the bearing 21 is fixedly connected to the bushing 221.

[0043] Of course, bearing 21 is not limited to rolling bearing 21 and sliding bearing 21. The connecting shaft 205 and bushing 221 can also be made of wear-resistant material to form a shaft and bushing structure to achieve relative rotation.

[0044] In some embodiments, the connecting box is a square box. The square box structure is adaptable to the drill rod 12 for easy insertion into the drill rod 12.

[0045] Specifically, the square box includes two first side plates 202 arranged opposite each other along a first direction and two second side plates 203 arranged opposite each other along a second direction to form a insertion cavity for inserting the drill rod 12, wherein the first direction is perpendicular to the second direction.

[0046] It can be seen that the square box is formed by two oppositely arranged first side plates 202 and two oppositely arranged second side plates 203. Correspondingly, the insertion cavity is a square cavity to facilitate insertion with the drill rod 12.

[0047] During assembly, the square box on the drill rod connecting assembly 20 is inserted into the drill rod 12 and fixed by inserting the pin 13.

[0048] Furthermore, to strengthen the structure of the square box, the drill pipe connecting assembly 20 also includes a connecting plate 201 and a first stiffening plate 204. The connecting plate 201 is located at the end of the connecting box away from the connecting shaft 205, and the first stiffening plate 204 is located between the connecting plate 201 and the connecting shaft 205 and is connected to the outer wall of the square box.

[0049] In this way, the outer wall of the square box, the connecting plate 201, and the connecting shaft 205 are connected by the first stiffening plate 204, so that the square box, the connecting plate 201, the connecting shaft 205 and the first stiffening plate 204 form an integral structure.

[0050] Of course, depending on actual needs, the drill pipe connection assembly 20 is welded together from a connecting plate 201, two first side plates 202, two second side plates 203, four first stiffening plates 204, and a connecting shaft 205.

[0051] In some embodiments, the connecting shaft 205 includes a shaft body and a plate disposed at one end of the shaft body near the connecting box. The plate body and the shaft body are an integral structure, and the plate body is disposed in the plane of the first direction and the second direction (e.g., Figure 2 The dimensions of the plate in the horizontal plane shown are greater than the dimensions of the shaft in the planes of the first and second directions. In other words, the area of ​​the plate in the horizontal plane is greater than the area of ​​the shaft in the horizontal plane. The first stiffener 204 and the connecting box are both welded to the plate.

[0052] In addition, the end of the shaft away from the plate is provided with an external thread surface. The sleeve pressurization device also includes a locking nut 23, which is threadedly engaged with the external thread surface. The locking nut 23 and the plate are used to limit the bearing 21 and the bushing 221 in the axial direction.

[0053] In some embodiments, the sleeve connection assembly 22 further includes a connecting ring plate 223 and a second stiffening plate 222. The connecting ring plate 223 is connected between the bushing 221 and the connecting cylinder 224, and the second stiffening plate 222 is disposed between the bushing 221 and the connecting cylinder 224 and is connected to the connecting ring plate 223.

[0054] In this way, the second stiffener 222 connects the bushing 221, the connecting cylinder 224, and the connecting ring plate 223, so that the second stiffener 222, the bushing 221, the connecting cylinder 224, and the connecting ring plate 223 form an integral structure.

[0055] Of course, depending on actual needs, the sleeve connection assembly 22 is welded together from the bushing 221, four second stiffening plates 222, the connecting ring plate 223, and the connecting cylinder 224.

[0056] In some embodiments, the sleeve pressurizing device 2 further includes at least two connecting pins 24, and the connecting cylinder 224 is provided with at least two connecting holes. The connecting pins 24 are fitted with the corresponding connecting holes and are used to connect with the sleeve 31.

[0057] During assembly, the sleeve connection assembly 22 is inserted into the sleeve 31 and fixed by inserting the connecting pin 24.

[0058] In some embodiments, a sealing structure is provided between the connecting shaft 205 and the bushing 221 to prevent external impurities from entering between the connecting shaft 205 and the bushing 221.

[0059] It should be noted that during the operation of the sleeve pressurization device 2, it will come into contact with a large amount of external impurities such as dust, dirt, and moisture. The sealing structure can effectively prevent these impurities from entering between the connecting shaft 205 and the bushing 221, avoiding wear on the rolling elements and raceways of the bearing 21, thereby extending the service life of the bearing 21. At the same time, the sealing structure can also prevent leakage of internal lubricating oil, ensuring that the bearing 21 always maintains a good lubrication state during operation. Good lubrication is the key to the normal operation of the bearing 21. The setting of the sealing structure helps to reduce the loss of lubricating oil, maintain the integrity of the lubricating film, and reduce the friction and wear of the bearing 21.

[0060] In some embodiments, the sealing structure is typically made of a material with good elasticity and wear resistance, such as rubber or polyurethane. These materials can fit tightly against the surfaces of the connecting shaft 205 and the bushing 221, forming an effective sealing barrier. For example, rubber sealing rings have good elasticity and oil resistance, and can maintain good sealing performance within a certain temperature and pressure range.

[0061] In some embodiments, the inner wall of the connecting cylinder 224 is provided with a guide structure for cooperating with the outer wall of the sleeve 31, and the guide structure is used to guide the sleeve 31 to connect to the connecting cylinder 224.

[0062] It can be seen that the function of the guide structure is to guide the sleeve 31 to accurately align with the connecting cylinder 224, preventing the sleeve 31 from becoming misaligned or stuck during the connection process. When the sleeve 31 approaches the connecting cylinder 224 and is ready to connect, the guide structure, based on its own shape or structural characteristics, guides and corrects the movement direction of the sleeve 31, ensuring that the central axis of the sleeve 31 is consistent with the central axis of the connecting cylinder 224, thereby achieving a smooth connection between the sleeve 31 and the connecting cylinder 224.

[0063] In some embodiments, the guide structure can be a keyway guide structure, for example, a plurality of keyways are provided circumferentially on the inner wall of the connecting cylinder 224, and the shape and size of the keyways match the keys provided on the outer wall of the sleeve 31. When the sleeve 31 is inserted into the connecting cylinder 224, the keys and keyways cooperate with each other, which not only plays a guiding role, but also prevents the sleeve 31 from rotating relative to each other during the connection process, ensuring the connection accuracy and stability between the sleeve 31 and the connecting cylinder 224.

[0064] Of course, the guide structure can also be a ball bearing guide structure, such as installing multiple rolling balls on the inner wall of the connecting cylinder 224, with the ball bearings protruding from the inner surface of the connecting cylinder 224. When the sleeve 31 is inserted into the connecting cylinder 224, the balls contact the outer wall of the sleeve 31. As the sleeve 31 moves, the balls roll on the outer wall of the sleeve 31, playing a guiding role and reducing friction. This guide structure can effectively reduce the frictional resistance between the sleeve 31 and the connecting cylinder 224, making the connection process of the sleeve 31 smoother, while also providing a certain degree of support and stability for the movement of the sleeve 31.

[0065] With this configuration, the pipe-rolling machine 3 provides torque to drive the casing 31 to reciprocate, and also provides a portion of the downward pressure to the casing 31. The rotary drilling rig 1 transmits a portion of the downward pressure to the casing pressurizing device 2 via the drill rod 12, and the casing pressurizing device 2 transmits a portion of the downward pressure to the casing 31. Since the rotational speeds of the power head 11 of the rotary drilling rig 1 and the pipe-rolling machine 3 are not synchronized, the drill rod connecting assembly 20 and the casing connecting assembly 22 on the casing pressurizing device 2 can rotate relative to each other, ensuring that the rotary drilling rig 1 only transmits downward pressure and not torque to the casing 31. At the same time, the torque output by the pipe-rolling machine 3 will not be transmitted to the drill rod 12, protecting the power head 11 from damage due to torque caused by asynchronous rotational speeds.

[0066] In this way, the casing 31 drills downwards under its own weight, the partial downward pressure provided by the pipe rolling machine 3, and the combined downward pressure of the rotary drilling rig 1. That is, by adding the casing pressurization device 2, the downward pressure provided by the rotary drilling rig 1 to the drill rod 12 is applied to the casing 31, increasing the downward pressure on the casing 31. This increases the construction efficiency and depth of the pipe rolling machine 3 in drilling the casing 31, solving the problem of the casing 31 being difficult to drill downwards or the drilling speed being too slow.

[0067] This application provides a rotary drilling equipment, including a rotary drilling rig 1 and a casing tumbling machine 3. The rotary drilling rig 1 includes a power head 11 and a drill rod 12. The casing tumbling machine 3 is connected to the rotary drilling rig 1 and is used to drive the casing 31 to rotate. It also includes a casing pressurization device 2 as described in the above specific embodiments. The casing pressurization device 2 is connected to the drill rod 12 and the casing 31 to transmit the pressure provided by the power head 11 to the drill rod 12 to the casing 31.

[0068] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0069] The casing pressurization device and rotary drilling equipment provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the solution and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A casing pressurization device, characterized in that, include: A drill pipe connection assembly includes a connecting shaft and a connecting box connected to the connecting shaft, the connecting box being used to connect the drill pipe; A sleeve connection assembly includes a bushing and a connecting sleeve connected to the bushing. The bushing is rotatably connected to the connecting shaft, and the connecting sleeve is used to connect a sleeve.

2. The sleeve pressurization device as described in claim 1, characterized in that, The connecting box is a square box, which includes two first side plates arranged opposite each other along a first direction and two second side plates arranged opposite each other along a second direction to form a insertion cavity for inserting drill rods. The first direction is perpendicular to the second direction.

3. The casing pressurization device as described in claim 2, characterized in that, The drill pipe connection assembly also includes: A connecting plate is located at the end of the connecting box away from the connecting shaft; The first stiffening plate is located between the connecting plate and the connecting shaft, and is connected to the outer wall of the connecting box.

4. The casing pressurization device as described in claim 3, characterized in that, The connecting shaft includes a shaft body and a plate body disposed at one end of the shaft body near the connecting box. The size of the plate body in the plane containing the first direction and the second direction is larger than the size of the shaft body in the plane containing the first direction and the second direction. The first stiffening plate and the connecting box are both welded to the plate body.

5. The casing pressurization device as described in claim 4, characterized in that, The shaft body has an external threaded surface at one end away from the plate body. The sleeve pressurization device also includes a locking nut, which is threadedly engaged with the external threaded surface to axially limit the bushing.

6. The casing pressurization device as described in claim 1, characterized in that, The sleeve connection assembly further includes: A connecting ring plate is used to connect the bushing and the connecting cylinder; The second stiffening plate is located between the bushing and the connecting cylinder, and is connected to the connecting ring plate.

7. The casing pressurization device as described in claim 1, characterized in that, The sleeve pressurization device further includes at least two connecting pins, and the connecting cylinder is provided with at least two connecting holes. The connecting pins are fitted into the corresponding connecting holes and are used to connect with the sleeve.

8. The casing pressurization device according to any one of claims 1-7, characterized in that, The connecting shaft is rotatably connected to the bushing via a bearing. A sealing structure is provided between the connecting shaft and the bushing to prevent external impurities from entering between the connecting shaft and the bushing.

9. The casing pressurization device according to any one of claims 1-7, characterized in that, The inner wall of the connecting cylinder is provided with a guide structure for cooperating with the outer wall of the sleeve, and the guide structure is used to guide the sleeve to connect to the connecting cylinder.

10. A rotary drilling equipment, comprising a rotary drilling rig and a casing rolling machine, wherein the rotary drilling rig includes a power head and a drill rod, and the casing rolling machine is connected to the rotary drilling rig, the casing rolling machine being used to drive the casing to rotate, characterized in that, It also includes a casing pressurization device as described in any one of claims 1-9, wherein the casing pressurization device is connected to the drill pipe and the casing to transmit the pressure provided by the power head to the drill pipe to the casing.

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