Top drive rotating head drive locking mechanism

Abstract

The utility model discloses a top drive rotating head driving locking mechanism, belongs to the technical field of petroleum drilling and production equipment, and solves the problems that a top drive rotating head locking mechanism and a driving mechanism in the prior art are two sets of independent mechanisms, so that the number of hydraulic systems is large, and the occupied space is large. The bottom end of the box body is connected with a rotating head, a worm wheel is installed on the rotating head, one side of the box body is connected with a worm support, the bottom end of the worm support is connected with a worm, the worm is connected with the worm wheel in a matched mode, one end of the worm is connected with a hydraulic motor, and the hydraulic motor is fixedly connected with the worm support. The hydraulic locking device is used in a top drive device for oil drilling and production, has the characteristic that a drive rotating mechanism and a locking mechanism are integrated, and can be driven only by adopting a set of hydraulic system.

Description

Technical Field

[0001] The utility model belongs to the technical field of oil drilling equipment and specifically relates to a top drive rotating head driving locking mechanism. Background Art

[0002] The top drive is a new type of oil drilling equipment, which has brought revolutionary changes to the oil industry, greatly improving drilling efficiency and drilling capacity. The top drive pipe handling mechanism can achieve 360° forward and reverse rotation during operation.

[0003] The traditional swivel head drive mechanism and locking mechanism are two independent mechanisms. The drive mechanism uses a hydraulic motor as the power source, and through gear transmission, it achieves deceleration and torque increase to drive the swivel head to rotate. The locking mechanism uses a cylinder to tighten the arc rack, so that the arc rack meshes with the swivel head gear, locks the swivel head, and transmits the torque on the swivel head to the box during the make and break buckle. When the swivel head rotates, the locking cylinder is retracted, the arc rack is disengaged from the swivel head gear, and the swivel head rotates through the gear transmission. Due to the small space, the transmission ratio of the gear transmission is small. Utility Model Content

[0004] The purpose of the utility model is to:

[0005] In order to solve the problem that the locking mechanism and driving mechanism of the top drive rotating head in the prior art are two independent mechanisms, resulting in a large number of hydraulic systems and a large occupied space, a top drive rotating head driving locking mechanism is provided.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A top drive rotary head drive locking mechanism comprises a box body, the bottom end of the box body is connected to a rotary head, a turbine is installed on the rotary head, one side of the box body is connected to a worm support, the bottom end of the worm support is connected to a worm, the worm is cooperatively connected to the turbine, the first end of the worm is connected to a hydraulic motor, and the hydraulic motor is fixedly connected to the worm support.

[0008] Furthermore, the worm support includes a left support and a right support, the left support and the right support are an integrally formed structure, the left support and the right support are arranged parallel to each other, and the two ends of the worm are rotatably connected to the left support and the right support respectively.

[0009] Furthermore, shaft sleeves are respectively connected between the two ends of the worm and the worm support, and the shaft sleeves are graphite self-lubricating shaft sleeves.

[0010] Furthermore, the worm support and the box body are connected via a plurality of bolts, and the hydraulic motor and the worm support are connected via a plurality of bolts.

[0011] Furthermore, a connecting key is connected between the hydraulic motor and the worm.

[0012] Furthermore, the turbine is installed on the top of the rotary head and is arranged at the connection between the rotary head and the box.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. One set of rotating head drive locking mechanism can realize the functions of two sets of mechanisms (rotating head drive mechanism and rotating head locking mechanism) of traditional top drive.

[0015] 2. Reduce the number of hydraulic systems. The driving mechanism of the traditional top drive requires a set of hydraulic motors and a set of hydraulic cylinders, two sets of hydraulic pipelines and control valve groups. The mechanism of the utility model only requires a set of hydraulic motors, and the locking mechanism is mechanically locked.

[0016] 3. Compact installation space. As the top drive is a high-altitude mobile operation equipment, it moves up and down repeatedly in the derrick. The size of the top drive is very limited by the size of the derrick, especially for small derricks. When operating, it is necessary to arrange hydraulic control valve groups, pressure switches and other hydraulic components in the circumferential direction of the rotating head, and then install two sets of mechanisms at the same time, which is very difficult. The mechanism of the utility model significantly saves space and is more convenient to install.

[0017] 4. Large transmission ratio. The traditional rotating head drive mechanism structure is gear transmission, with a small transmission ratio and high hydraulic system pressure. The worm gear structure of the utility model can achieve a large transmission ratio in a small space, and only requires a small hydraulic system pressure to achieve a large transmission torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall structure diagram of the utility model;

[0019] Figure 2 for Figure 1 Left view of;

[0020] Figure 3 The utility model is an installation structure diagram of the drive locking mechanism in the top drive device.

[0021] Markings in the figure: 1-box, 2-left support, 3-right support, 4-sleeve, 5-turbine, 6-hydraulic motor, 7-connecting key, 8-worm, 9-rotating head. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail in combination with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] A top drive rotary head driving locking mechanism comprises a casing 1, a rotary head 9 is connected to the bottom end of the casing 1, a turbine 5 is mounted on the rotary head 9, a worm 8 support is connected to one side of the casing 1, a worm 8 is connected to the bottom end of the worm 8 support, the worm 8 is cooperatively connected to the turbine 5, a hydraulic motor 6 is connected to the first end of the worm 8, and the hydraulic motor 6 is fixedly connected to the worm 8 support.

[0024] The support of the worm 8 includes a left support 2 and a right support 3. The left support 2 and the right support 3 are an integrally formed structure. The left support 2 and the right support 3 are arranged parallel to each other. The two ends of the worm 8 are rotatably connected to the left support 2 and the right support 3 respectively.

[0025] Both ends of the worm 8 and the support of the worm 8 are respectively connected with shaft sleeves 4, and the shaft sleeves 4 are graphite self-lubricating shaft sleeves 4.

[0026] The support of the worm 8 is connected to the box body 1 through a plurality of bolts, and the hydraulic motor 6 is connected to the support of the worm 8 through a plurality of bolts.

[0027] A connecting key 7 is connected between the hydraulic motor 6 and the worm 8 .

[0028] The turbine 5 is mounted on the top of the rotary head 9 and is disposed at the connection between the rotary head 9 and the housing 1 .

[0029] The box body 1 is located on the upper part of the rotating head 9 driving locking mechanism, and the left and right supports 3 are installed on the box body 1.

[0030] The support is divided into a left support 2 and a right support 3 , and the worm 8 and the hydraulic motor 6 are installed on the left and right supports 3 .

[0031] The shaft sleeve 4 is a graphite self-lubricating shaft sleeve 4, which is installed at both ends of the worm 8. When the worm 8 rotates, it plays a role of wear resistance and lubrication.

[0032] The turbine 5 is mounted on the rotating head 9 and connected to the rotating head 9 by bolts.

[0033] The hydraulic motor 6 is the power source for driving the locking mechanism of the rotary head 9 .

[0034] The worm 8 and the hydraulic motor 6 transmit torque via the connecting key 7 .

[0035] The mechanism of the utility model adopts a self-locking turbine 5 and worm 8 structure. The hydraulic motor 6 drives the worm 8 to drive the turbine 5 to rotate, and the turbine 5 drives the rotating head 9 to rotate. Since it is a self-locking mechanism (Note: when the lead angle of the turbine 5 and worm 8 is 3°16′14″, the structure of the turbine 5 and worm 8 is a self-locking structure, that is, when the worm 8 is rotated by torque, it can drive the turbine 5 to rotate; when the worm wheel is subjected to torque, it cannot reversely drive the worm 8 to rotate, and only the worm 8 can drive the turbine 5), the turbine 5 cannot reversely drive the worm 8 to rotate. When the rotating head 9 needs to rotate, the hydraulic motor 6 drives the worm 8 to rotate, and the worm 8 drives the turbine 5 to rotate. The turbine 5 is installed on the rotating head 9, and the rotating head 9 is driven to rotate when the turbine 5 rotates. This mechanism realizes the rotation and locking functions of the rotating head 9 with the same set of mechanisms. The turbine 5 and worm 8 can achieve a larger transmission ratio in a smaller space. The conventional gear transmission has a gear transmission ratio of about 8, and the transmission ratio achieved by the turbine 5 and worm 8 is 71. The transmission ratio of the turbine 5 and worm 8 is larger than that of the gear transmission, and a larger transmission ratio can be achieved in a smaller space, and the rotating head 9 can be driven to rotate with a smaller hydraulic system pressure.

[0036] When the top drive is unfastening, the rotating head 9 cannot reversely drive the worm 8 to rotate, and the torque on the rotating head 9 can be transmitted to the casing 1 when the top drive is unfastening (if the turbine 5 can reversely drive the worm 8, the generated torque will be released through rotation, and the torque will not be transmitted, and the top drive unfastening function cannot be realized).

[0037] The functional principle and implementation steps of the utility model are as follows:

[0038] Since the drill pipe elevator is a single-side door structure, when the drilling tool is assembled and the drilling tools are delivered to the second-floor platform, the elevator door opens forward. When the top drive drills to the bottom, the rotary head 9 is rotated 180°, the elevator door is opened, and the lifting ring tilting mechanism is extended before drilling to the bottom. When the rotary head 9 needs to rotate, the hydraulic motor 6 can drive the worm 8 to rotate, and the worm 8 drives the turbine 5 and the rotary head 9 to rotate. When the turbine 5, the rotary head 9 and the turbine 5 rotate, the box 1 does not rotate.

[0039] When the top drive is unfastened, the torque generated by the unfastening needs to be transmitted to the top drive housing 1. The structure of the turbine 5 worm 8 of the utility model is a self-locking structure, and the turbine 5 cannot reversely drive the worm 8 to rotate. At this time, the unfastening torque can be transmitted to the housing 1. (Note: When the lead angle of the turbine 5 is 3°16′14″, the structure of the turbine 5 worm 8 is a self-locking structure, that is, when the worm 8 is rotated by torque, it can drive the turbine 5 to rotate; when the turbine 5 is subjected to torque, it cannot drive the worm 8 to rotate).

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A top drive rotary head drive locking mechanism, characterized in that: The invention comprises a casing (1), the bottom end of which is connected to a rotating head (9), a turbine (5) being mounted on the rotating head (9), one side of which is connected to a worm (8) support, the bottom end of which is connected to a worm (8), the worm (8) being cooperatively connected to the turbine (5), the first end of the worm (8) being connected to a hydraulic motor (6), the hydraulic motor (6) being fixedly connected to the worm (8) support.

2. A top drive rotating head drive locking mechanism according to claim 1, characterized in that: The worm (8) support comprises a left support (2) and a right support (3); the left support (2) and the right support (3) are an integrally formed structure; the left support (2) and the right support (3) are arranged parallel to each other; and the two ends of the worm (8) are rotatably connected to the left support (2) and the right support (3) respectively.

3. A top drive rotating head drive locking mechanism according to claim 1, characterized in that: A shaft sleeve (4) is respectively connected between the two ends of the worm (8) and the worm (8) support, and the shaft sleeve (4) is a graphite self-lubricating shaft sleeve (4).

4. A top drive rotating head drive locking mechanism according to claim 1, characterized in that: The worm (8) support and the box body (1) are connected via a plurality of bolts, and the hydraulic motor (6) and the worm (8) support are connected via a plurality of bolts.

5. A top drive rotating head drive locking mechanism according to claim 1, characterized in that: A connecting key (7) is connected between the hydraulic motor (6) and the worm (8).

6. A top drive rotating head drive locking mechanism according to claim 1, characterized in that: The turbine (5) is installed on the top of the rotary head (9) and is arranged at the connection between the rotary head (9) and the casing (1).

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