Truck-mounted drilling rig casing pipe lowering device

Abstract

The utility model relates to the technical field of engineering machinery, in particular to a truck-mounted drilling rig casing lowering device which comprises a casing lifting hanger, a connecting pin, a casing lifting wire and a casing male buckle, the casing male buckle is of a hollow cylindrical structure with two thin ends and a thick middle, a mounting groove is formed in the side face of the casing male buckle, and the casing lifting wire is arranged in the mounting groove. A clamping groove is formed in the sleeve male buckle, two sets of limiting bolts are arranged on the inner wall of the clamping groove, and a locking hole is formed in the sleeve male buckle. The casing male buckle, the casing lifting hanger and the casing lifting wire are connected through the safety lock pin, the connecting pin can be conveniently fixed in the casing male buckle and the casing lifting wire while the connecting stability is guaranteed, the mounting steps and time of the connecting pin are saved, the connecting efficiency between casings is improved, and the service life of the casing is prolonged. Therefore, the overall engineering efficiency of the truck-mounted drilling rig is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a casing lowering device for a vehicle-mounted drill rig. Background Technique

[0002] A vehicle-mounted drill rig is a mechanical device with a small volume and good mobility. By using a vehicle-mounted drill rig, it has high operability for some special construction sites. The space of the wellhead operation platform of the traditional vehicle-mounted drill rig is limited, and it is impossible to use a casing tong to complete the make-up and break-out operations during the casing lowering operation. However, since the casing lowering operation is a key process and the make-up must be carried out in accordance with industry specifications, in order to more conveniently lower the casing of the vehicle-mounted drill rig, we propose a casing lowering device for a vehicle-mounted drill rig.

[0003] The following defects still exist in the prior art during use:

[0004] 1. The installation of the casing lowering device for the vehicle-mounted drill rig in the prior art is not convenient enough. During the operation of the drill rig, it is necessary to manually connect the casings, and the efficiency of manually connecting the casings directly affects the working efficiency of the vehicle-mounted drill rig, resulting in an unsatisfactory working efficiency of the traditional vehicle-mounted drill rig.

[0005] 2. The torque transmission effect of the casing lowering device for the vehicle-mounted drill rig in the prior art on the drill rig is limited. When the torque of the vehicle-mounted drill rig is transmitted through the casing, it is affected by the length, diameter and connection stability of the casing. The traditional casing connection structure cannot ensure efficient transmission of torque under the condition of stable connection. Therefore, the length of the casing used by the traditional vehicle-mounted drill rig is limited, which further limits the application range of the vehicle-mounted drill rig.

[0006] In view of this, we propose a casing lowering device for a vehicle-mounted drill rig to solve the existing problems. Content of the Utility Model

[0007] The purpose of the utility model is to provide a casing lowering device for a vehicle-mounted drill rig to solve the problems raised in the above background technique.

[0008] To achieve the above purpose, the utility model provides the following technical solution: A casing lowering device for a vehicle-mounted drill rig, including a casing hanger, a connecting pin, a casing lifting wire and a casing male thread. The casing male thread is a hollow cylindrical structure with thin ends and thick middle. An installation groove is opened on the side surface of the casing male thread. A clamping groove is opened inside the casing male thread, and two groups of limit bolts are arranged on the inner wall of the clamping groove. A locking hole is opened inside the casing male thread, and the included angle between the radial axis of the locking hole and the clamping groove is 90 degrees;

[0009] The top of the casing male thread is fixedly installed with a casing hanger;

[0010] A casing male thread is installed with a casing lifting wire at the bottom. A locking tongue is fixedly installed at the top of the casing lifting wire, and an installation hole is provided inside the locking tongue.

[0011] A connecting pin is installed through the inside of the locking tongue, and a safety locking pin is installed through the inside of the connecting pin, and the safety locking pin is engaged with the installation groove.

[0012] Preferably, both ends of the safety locking pin penetrate through the connecting pin and extend out of the casing male thread, and fixing bolts are installed at the extended ends of the safety locking pin through a threaded structure.

[0013] Preferably, a connecting groove is provided at the top of the casing hanging, and fixing grooves are equidistantly provided on the inner wall of the connecting groove. The fixing grooves are inverted T-shaped grooves.

[0014] Preferably, the connecting groove is trapezoidal in reverse, and threads are provided on the inner wall of the connecting groove.

[0015] Preferably, a groove is provided on the side of the locking tongue, and the groove is engaged with the safety locking pin.

[0016] Preferably, a clamping cap is fixedly installed on the side of the locking tongue, and four limiting holes are respectively provided on both sides of the clamping cap. The limiting holes are respectively engaged with the limiting bolts.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By using a safety locking pin to connect the casing male thread, the casing hanging and the casing lifting wire, the present utility model can ensure the connection stability while facilitating the fixing of the connecting pin inside the casing male thread and the casing lifting wire, saving the installation steps and time of the connecting pin, improving the connection efficiency between the casings, and thus being beneficial to improving the overall engineering efficiency of the vehicle-mounted drill rig.

[0019] 2. By using a safety locking pin to connect the casing male thread, the casing hanging and the casing lifting wire and making the safety locking pin embed into the installation groove inside the casing male thread, the present utility model can ensure the connection stability between the casings. Moreover, the diameter of the casing male thread is larger than that of the casing hanging and the casing lifting wire, and both the upper and lower ends of the casing male thread are inclined planes, reducing the resistance suffered by the casing male thread when the casing drills downward, so as to efficiently transmit the torque of the vehicle-mounted drill rig, enabling the vehicle-mounted drill rig to use longer casings for drilling and expanding the applicable range of the vehicle-mounted drill rig. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0021] Figure 2 is a front structure schematic diagram of the present utility model;

[0022] Figure 3 is a top view structural schematic diagram of the present utility model;

[0023] Figure 4 is a first partial sectional structural schematic diagram of the present utility model;

[0024] Figure 5 is a second partial sectional structural schematic diagram of the present utility model;

[0025] Figure 6 is a third partial sectional structural schematic diagram of the present utility model;

[0026] Figure 7 is a fourth partial sectional structural schematic diagram of the present utility model.

[0027] In the figure: 1, casing hanger; 101, fixing groove; 102, connecting groove; 2, connecting pin; 201, fixing bolt; 202, safety lock pin; 3, casing lifting wire; 301, lock tongue; 302, clamping cap; 303, limiting hole; 304, mounting hole; 4, male casing thread; 401, mounting groove; 402, limiting bolt; 403, locking hole; 404, clamping groove. Specific embodiments

[0028] The technical solutions of the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as Figure 1 - Figure 7As shown in the figure, a casing lowering device for a vehicle-mounted drilling rig proposed by the present utility model includes a casing hanger 1, a connecting pin 2, a casing lifting wire 3 and a casing male thread 4. The casing male thread 4 is a hollow cylindrical structure with a thin middle and thick ends. An installation groove 401 is provided on the side surface of the casing male thread 4, and a clamping groove 404 is provided inside the casing male thread 4. Two groups of limit bolts 402 are provided on the inner wall of the clamping groove 404. A locking hole 403 is provided inside the casing male thread 4, and the included angle between the radial axis of the locking hole 403 and the clamping groove 404 is 90 degrees. The casing male thread 4 is used to connect the casing lifting wire 3 and the casing hanger 1, so as to connect the casings in series. On the one hand, it ensures the connection stability, and on the other hand, it is convenient for transmitting the torque of the vehicle-mounted drilling rig, so that the vehicle-mounted drilling rig can connect several casings for drilling. The installation groove 401 can be fitted with the safety lock pin 202 to provide a position for installing the safety lock pin 202, avoiding the vertical deviation of the safety lock pin 202 and ensuring the installation stability of the safety lock pin 202. The clamping groove 404 can provide a position for installing the locking tongue 301. Cooperating with the limit bolt 402 to fit with the limit hole 303 can ensure the installation stability of the casing male thread 4 and the casing lifting wire 3. And during the process of transmitting torque, it can prevent the sliding at the contact position between the casing male thread 4 and the casing lifting wire 3 to ensure the torque transmission efficiency of the device. The locking hole 403 can provide a position for installing the connecting pin 2. Furthermore, the casing male thread 4 and the locking tongue 301 are connected by the connecting pin 2, so that the casing hanger 1 is stably connected to the casing lifting wire 3 through the casing male thread 4;

[0030] The casing hanger 1 is fixedly installed at the top of the casing male thread 4. The casing hanger 1 can be fixedly connected to the driving end of the vehicle-mounted drilling rig, so that the casing hanger 1 is driven to rotate by the vehicle-mounted drilling rig, and the components at the bottom of the casing hanger 1 are driven to rotate synchronously;

[0031] The casing lifting wire 3 is installed at the bottom of the casing male thread 4. The locking tongue 301 is fixedly installed at the top of the casing lifting wire 3. An installation hole 304 is provided inside the locking tongue 301. The casing lifting wire 3 can be connected to the casing male thread 4 through the locking tongue 301, so that several casings can be connected in series with the casing hanger 1 through the casing male thread 4, and then the casings can be drilled by the vehicle-mounted drilling rig;

[0032] The connecting pin 2 is installed through the locking tongue 301, and the safety lock pin 202 is installed through the connecting pin 2. And the safety lock pin 202 is engaged with the installation groove 401. The connecting pin 2 can cooperate with the safety lock pin 202 to connect the casing hanger 1, the casing lifting wire 3 and the casing male thread 4. Furthermore, when the casing hanger 1 rotates, it can drive the casing lifting wire 3 to rotate, and is pushed by the vehicle-mounted drilling rig to make the casing lifting wire 3 move vertically downward, so as to drill several casings into the designated position of the project.

[0033] Further, both ends of the safety lock pin 202 penetrate through the connecting pin 2 and extend out of the male casing joint 4, and fixing bolts 201 are installed at the extended ends of the safety lock pin 202 through a threaded structure. The safety lock pin 202 is limited at one end by the fixing bolt 201, which can prevent the safety lock pin 202 from slipping out of the inside of the male casing joint 4 during the rotation of the device, so as to ensure the installation stability of the safety lock pin 202 for the connecting pin 2.

[0034] Further, a connecting groove 102 is formed at the top of the casing hanger 1, and fixing grooves 101 are equidistantly formed on the inner wall of the connecting groove 102. The fixing grooves 101 are inverted T-shaped grooves. The connecting groove 102 and the fixing grooves 101 can facilitate the fixed connection between the casing hanger 1 and the driving end of the vehicle-mounted drill, so that the vehicle-mounted drill can drive the casing hanger 1 to rotate and transmit torque to the casing lifting screw 3 to drive the casing lifting screw 3 to rotate.

[0035] Further, the connecting groove 102 is trapezoidal in reverse, and a thread is provided on the inner wall of the connecting groove 102.

[0036] Further, a groove is formed on the side surface of the lock tongue 301, and the groove is engaged with the safety lock pin 202.

[0037] Further, a clamping cap 302 is fixedly installed on the side surface of the lock tongue 301, and four limiting holes 303 are respectively formed on both sides of the clamping cap 302. The limiting holes 303 are respectively engaged with the limiting bolts 402. The limiting holes 303 can be fitted with the limiting bolts 402. Thus, when the male casing joint 4 drives the casing lifting screw 3 to rotate, the offset degree between the male casing joint 4 and the casing lifting screw 3 can be reduced, so as to ensure the stability of the male casing joint 4 and the casing lifting screw 3 during rotation, and can also ensure the efficient transmission of torque between the male casing joint 4 and the casing lifting screw 3.

[0038] Working principle: After fixedly installing the casing hanger 1 at the bottom of the driving end of the vehicle-mounted drill, insert the lock tongue 301 at the top of the casing lifting screw 3 into the inside of the male casing joint 4, and penetrate the connecting pin 2 through both the male casing joint 4 and the casing lifting screw 3 at the same time. After penetrating the safety lock pin 202 through the connecting pin 2, use the fixing bolt 201 to limit the safety lock pin 202. Then, connect the casing hanger 1 and the casing lifting screw 3 through the male casing joint 4, fix the casing through the casing lifting screw 3, drive the casing hanger 1 to rotate by the vehicle-mounted drill, and the casing hanger 1 transmits torque to the casing lifting screw 3 through the male casing joint 4, thereby driving the casing lifting screw 3 and the casing installed at its bottom to rotate synchronously, and driving the casing to move downward at a uniform speed. After the casing is drilled to a certain depth, disconnect the connection between the casing and the casing lifting screw 3, connect another casing to the drilled casing, and connect the casing lifting screw 3 to the top end of the newly installed casing. Then, drive the components at the bottom to rotate and move vertically downward again by the vehicle-mounted drill to drill several casings in series underground to complete the installation of the casings required for the project.

[0039] The above specific embodiments are only several preferred embodiments of the present utility model. Based on the technical solution of the present utility model and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A casing lowering device for a vehicle-mounted drilling rig, comprising a casing lifting hook (1), a connecting pin (2), a casing lifting wire (3) and a casing male buckle (4), characterized in that: The sleeve male buckle (4) is a hollow cylindrical structure with thin ends and a thick middle. A mounting groove (401) is provided on the side of the sleeve male buckle (4). A clamping groove (404) is provided inside the sleeve male buckle (4), and two groups of limit bolts (402) are provided on the inner wall of the clamping groove (404). A locking hole (403) is provided inside the sleeve male buckle (4), and the angle between the radial axis of the locking hole (403) and the clamping groove (404) is 90 degrees. A sleeve hook (1) is fixedly mounted on the top of the sleeve male buckle (4); A sleeve lifting thread (3) is installed at the bottom of the sleeve male buckle (4), a locking tongue (301) is fixedly installed at the top of the sleeve lifting thread (3), and a mounting hole (304) is opened inside the locking tongue (301); A connecting pin (2) is installed through the interior of the locking tongue (301), a safety locking pin (202) is installed through the interior of the connecting pin (2), and the safety locking pin (202) is engaged and connected with the installation groove (401).

2. The vehicle-mounted drilling rig casing lowering device according to claim 1 is characterized in that: Both ends of the safety locking pin (202) penetrate the connecting pin (2) and extend out of the sleeve male buckle (4), and the two ends extending out of the safety locking pin (202) are installed with fixing bolts (201) through a threaded structure.

3. The vehicle-mounted drilling rig casing lowering device according to claim 1 is characterized in that: The top of the sleeve hanging (1) is provided with a connecting groove (102), and the inner wall of the connecting groove (102) is provided with fixing grooves (101) at equal intervals, wherein the fixing grooves (101) are inverted T-shaped grooves.

4. The vehicle-mounted drilling rig casing lowering device according to claim 3 is characterized in that: The connecting groove (102) is in an inverted trapezoidal shape, and a thread is provided on the inner wall of the connecting groove (102).

5. The vehicle-mounted drilling rig casing lowering device according to claim 1 is characterized in that: A groove is provided on the side of the locking tongue (301), and the groove is engaged with the safety locking pin (202).

6. The vehicle-mounted drilling rig casing lowering device according to claim 1, characterized in that: A clamping cap (302) is fixedly mounted on the side of the locking tongue (301), and four limiting holes (303) are respectively opened on both sides of the clamping cap (302), and the limiting holes (303) are respectively clamped and connected with the limiting bolts (402).

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