A centred rotatable cab for a workover rig

Abstract

The present application relates to the field of oilfield workover operation, and particularly relates to a centripetal rotatable operating room for a workover rig. The main problem to be solved is that the existing operating room of the workover rig has a serious visual field obstruction and it is inconvenient to observe the wellhead condition during the workover operation. The centripetal rotatable operating room for the workover rig comprises an operating room main body (6), the bottom center of the operating room main body (6) is connected with a rotating shaft A (5), the rotating shaft A (5) is connected with one end of a rotary beam (3), the other end of the rotary beam (3) is connected with a rotating shaft C (9), the rotating shaft C (9) is connected with a fixed seat (7), and the fixed seat (7) is fixed on the workover rig (14). The centripetal rotatable operating room for the workover rig can rotate outward to a working position during the workover operation, avoids the interference of the derrick and other components on the visual field, and makes the visual field of the driller more open, so that the judgment is more rapid and accurate.

Description

Technical Field

[0001] This invention relates to the field of oilfield well workover operations, specifically a centripetal rotatable operating room for workover rigs. Background Technology

[0002] Currently, the fully automatic workover rig operator cabins used in oilfields mainly adopt two structures: fixed and rotatable. The fixed type means the operator cabin is fixed to one side of the rig's rear end and cannot be moved. When the driller observes the wellhead from inside the cabin, their field of vision is severely obstructed by components such as the derrick in front and to the side, greatly increasing the difficulty of drilling. The rotatable type means the operator cabin can rotate outwards around a fixed axis, changing its position to avoid obstruction from the derrick and other components, allowing for a clearer observation of the wellhead and its surroundings. However, because the fixed axis is not centered on the wellhead, the observation window after rotation is not directly facing the wellhead, but rather offset to the left of the wellhead's center. This requires the driller to turn their head at an angle when observing the wellhead from inside the cabin. Prolonged operation in this posture rapidly increases neck fatigue for the driller, thus also presenting certain drawbacks. Summary of the Invention

[0003] To overcome the shortcomings of existing workover rig operator cabins, such as severe obstruction of vision and inconvenience in observing wellhead conditions during workover operations, this invention provides a centripetal rotatable operator cabin for workover rigs. This centripetal rotatable operator cabin can rotate outward to the working position during workover operations, avoiding interference from components such as the derrick, providing the driller with a wider field of vision and enabling faster and more accurate judgment.

[0004] The technical solution of the present invention is: a centripetal rotatable operating room for a workover rig, comprising an operating room body, wherein a rotating shaft A is connected to the center of the bottom of the operating room body, the rotating shaft A is connected to one end of a rotating beam, the other end of the rotating beam is connected to a rotating shaft C, the rotating shaft C is connected to a fixed base, and the fixed base is fixed to the workover rig.

[0005] Furthermore, the workover rig is connected to a telescopic hydraulic cylinder, and the piston end of the telescopic hydraulic cylinder is connected to the rotary beam.

[0006] Furthermore, a rotating shaft B is connected to one side of the bottom of the main body of the operating room. The lower end of the rotating shaft B is connected to one end of the pull rod, and the other end of the pull rod is connected to a rotating shaft D, which is connected to a fixed base.

[0007] Furthermore, one side of the slewing beam is connected to an adjustable-length support leg via a pin.

[0008] Furthermore, the outriggers can rotate around the pin within a range of 0-90° and are locked in the vertically downward and horizontal directions.

[0009] Furthermore, the observation window at the front of the main body of the control room is an outwardly protruding arc shape.

[0010] Furthermore, when the telescopic cylinder retracts, the main body of the operating room is located above the workover rig platform.

[0011] Furthermore, when the telescopic cylinder extends, it pushes the rotary beam to rotate along the rotating shaft C, causing the main body of the operating room to move to the outside of the workover rig. When the telescopic cylinder extends to its limit position, the front observation window of the main body of the operating room faces the center of the wellhead.

[0012] Furthermore, when the telescopic cylinder extends to its limit position, the outrigger is rotated to a vertically downward position, and the length of the outrigger is adjusted so that it supports the ground.

[0013] The present invention has the following beneficial effects: Due to the above-mentioned design, the main body of the centripetal rotatable operating cab is connected to a rotating beam via a rotating shaft, and the rotating beam is connected to the workover rig via a rotating shaft. Similarly, the main body of the operating cab is connected to a tie rod via a rotating shaft, and the tie rod is connected to the workover rig via a rotating shaft. Thus, the main body of the operating cab, the rotating beam, the tie rod, and the workover rig together form a double rocker mechanism. During operation, the telescopic cylinder drives the main body of the operating cab to move via the rotating beam, and the tie rod can restrict the direction of the main body of the operating cab. In this way, while the operating cab rotates outward, the direction of its observation window can be continuously and automatically adjusted towards the center of the wellhead until it is directly facing the center of the wellhead. During workover operations, the driller's view of the wellhead is not obstructed by the workover rig derrick or other components, and there is no need to turn the driller's head to the side, resulting in a wider field of vision. This allows for faster and more accurate judgment, improving the safety and accuracy of the operation. It also avoids the driller having to turn their head to the side for extended periods, reducing physical harm. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention;

[0015] Figure 2 This is a perspective view of the bottom of the invention;

[0016] Figure 3 This is the front view of the present invention;

[0017] Figure 4 This is a bottom view of the present invention;

[0018] Figure 5 This is a top view of the present invention;

[0019] Figure 6 This is a bottom view of the main body of the control room;

[0020] Figure 7 This is a schematic diagram of the connection between the outrigger and the slewing beam;

[0021] Figure 8This is a schematic diagram of the main body of the control room in its initial position;

[0022] Figure 9 This is a schematic diagram of the main body of the control room in the working position;

[0023] Figure 10 This is a schematic diagram of the present invention.

[0024] In the diagram, 1-rotating shaft B, 2-pull rod, 3-slewing beam, 4-support leg, 5-rotating shaft A, 6-main body of the operating room, 7-fixed seat, 8-telescopic cylinder, 9-rotating shaft C, 10-rotating shaft D, 11-pin, 12-locking pin, 13-inlet, 14-workover rig. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it is necessary to understand that the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "inner," "outer," "top," and "bottom" are based on the orientations or positional relationships shown in the accompanying drawings. They are intended only to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the components referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] Depend on Figures 1 to 5 As shown, a centripetal rotatable operating cab for a workover rig includes an operating cab body 6. The windshield, or observation window, of the operating cab body 6 is an outwardly protruding arc shape, which increases the observation area and improves the field of vision. Rotating shafts A5 and B1 are respectively connected to the bottom of the operating cab body 6, with rotating shaft A5 located at the center of the bottom and rotating shaft B1 located on one side of the bottom. Figure 6 Because the supporting force borne by the rotating shaft A5 is greater, its diameter can be made larger than that of the rotating shaft B1 during processing. The lower end of the rotating shaft A5 is connected to one end of the rotating beam 3, and the other end of the rotating beam 3 is connected to the rotating shaft C9. The lower end of the rotating shaft C9 is connected to the fixed seat 7, which is fixed to the workover rig 14. Since the fixed seat 7 supports the rotating beam 3 and the main body of the operating chamber 6, it should be securely fixed.

[0028] The rotating beam 3 supports the main body 6 of the operating room and connects the main body 6 of the operating room to the workover rig platform. The rotating beam 3 has a rectangular cross-section, and its strength must be ensured during processing. One end of the rotating beam 3 is connected to the main body 6 of the operating room via a rotating shaft A5, and the other end is connected to the fixed seat 7 via a rotating shaft C9. Therefore, when the rotating beam 3 rotates around the rotating shaft C9, the main body 6 of the operating room can be moved from above the workover rig 14 to the outside of the workover rig; the rotation of the main body 6 of the operating room around the rotating shaft A5 ensures that the observation hole of the main body 6 is always directly facing the wellhead 13.

[0029] The workover rig 14 is connected to a telescopic cylinder 8. The cylinder body of the telescopic cylinder 8 is fixed to the workover rig, and the plunger end is connected to the rotary beam 3. When the telescopic cylinder 8 extends, it pushes the rotary beam 3 to rotate, thereby pushing the operating chamber body 6 away from the workover rig 14. When the telescopic cylinder 8 retracts, it moves the operating chamber body 6 back onto the workover rig 14, without occupying extra space and facilitating transportation. The control button of the telescopic cylinder 8 is located inside the operating chamber body 6, allowing the driller to adjust the position of the operating chamber body 6 according to the site conditions. Preferably, the connection point between the plunger of the telescopic cylinder 8 and the rotary beam 3 is close to the side of the operating chamber body 6, making the extension and retraction of the telescopic cylinder 8 less strenuous.

[0030] The upper end of the rotating shaft B1 is connected to the bottom of the operating chamber body 6, and the lower end is connected to one end of the pull rod 2. The other end of the pull rod 2 is connected to the rotating shaft D10, and the other end of the rotating shaft D10 is connected to the fixed seat 7. Since the two ends of the pull rod 2 are connected to the operating chamber body 6 and the fixed seat 7 respectively through the rotating shaft, when the operating chamber body 6 moves out of the workover rig 14 under the drive of the rotary beam 3, the pull rod 2 can pull the operating chamber body 6, causing its angle to change continuously. When the rotary beam 3 moves to its limit position, the observation window of the operating chamber body 6 can face the wellhead 13. When the operating chamber body 6 moves, the pull rod 2 plays an auxiliary role in adjusting the direction. Therefore, during processing, the cross-sectional dimension of the pull rod 2 can be slightly smaller than the cross-sectional dimension of the rotary beam 3. At the same time, the diameter of the rotating shaft B1 can also be smaller than the diameter of the rotating shaft A5.

[0031] The slewing beam 3 is connected to the support leg 4 on one side via a pin 11, see Figure 7The outrigger 4 can rotate within a 0-90° range around the pin 11, allowing it to be in any horizontal or vertical position, and can be locked in the vertically downward and horizontal directions. The length of the outrigger 4 is adjustable and can be locked in place by the locking pin 12 after adjustment. Since the outrigger 4 supports the operating room when the workover rig is working, the strength of the outrigger 4 should be ensured during manufacturing, and its length should be securely fixed after adjustment. When the workover rig is not working, the outrigger 4 is in a horizontal position and is fixed to one side of the rotary beam 3 by the locking pin 12. When the operating room body 6 is moved out of the workover rig 14 for workover operations, the outrigger 4 is rotated along the pin 11 to a vertically downward position, the length of the outrigger 4 is adjusted to support it on the ground, and it is locked in place by the locking pin 12. This ensures greater stability of the operating room body, prevents the operating room body 6 from vibrating up and down during operation, and ensures operational safety.

[0032] The centripetal rotatable operating cab, consisting of the main body 6, rotating beam 3, tie rod 2, and workover rig 14, forms a double rocker mechanism capable of horizontal movement. Its principle is described in [link to technical details]. Figure 10 When the telescopic cylinder 8 pushes the rotary beam 3 to swing, the tie rod 2 swings along with it. Under the combined action of the tie rod 2 and the main body 6 of the operating chamber, the main body 6 of the operating chamber can swing with the rotary beam 3, and its own angle also changes continuously. When the plunger of the telescopic cylinder 8 extends to its limit position, the observation window of the main body 6 of the operating chamber can be directly facing the wellhead, thus better ensuring the operator's field of vision.

[0033] When not in use, the telescopic cylinder 8 of this centripetal rotatable operating cab is in the retracted state, and the main body 6 of the operating cab is located above the workover rig 14, which does not increase the footprint of the workover rig and facilitates transportation. Figure 8 During well workover operations, the workover rig 14 moves to the vicinity of the wellhead 13, and the telescopic cylinder 8 extends. The plunger pushes the rotary beam 3 to rotate along the shaft C9, causing the operator's cab 6 to move outward from the workover rig 14. Simultaneously, the operator's cab 6 rotates around the shaft B1 under the pull of the tie rod 2. When the telescopic cylinder 8 extends to its limit position, the front observation window of the operator's cab 6 faces the center of the wellhead 13. At this point, the driller has the best field of vision while seated in the operator's cab. Figure 9 Rotate outrigger 4 to a vertically downward position and adjust its extension length so that the lower end of outrigger 4 contacts the ground. Lock the length of outrigger 4 to support the main body 6 of the operating room and prevent it from vibrating up and down during operation. After the well workover operation is completed, retract outrigger 4 and lock it to the side of the rotary beam 3. The plunger of the telescopic cylinder 8 retracts, and under the action of the plunger's pulling force, the rotary beam 3 rotates around the pivot C9 towards the inside of the workover rig platform, stopping when it reaches the initial position. The entire process is complete.

[0034] In this centripetal rotatable operating cab, the main body of the operating cab is connected to a rotating beam via a rotating shaft, and the rotating beam is in turn connected to the workover rig via a rotating shaft. Similarly, the main body of the operating cab is connected to a tie rod via a rotating shaft, and the tie rod is connected to the workover rig via a rotating shaft. Thus, the main body of the operating cab, the rotating beam, the tie rod, and the workover rig together form a double rocker mechanism. During operation, the telescopic cylinder moves the main body of the operating cab through the rotating beam, and the tie rod can restrict the direction of the main body of the operating cab. In this way, while the operating cab rotates outward, the direction of its observation window can be automatically adjusted continuously towards the center of the wellhead until it is directly facing the center of the wellhead. During well workover operations, the driller's view of the wellhead is not obstructed by the workover rig derrick or other components, and there is no need to turn the driller's head to the side, resulting in a wider field of vision. This allows for faster and more accurate judgment, improving the safety and accuracy of the operation. It also avoids the driller having to turn their head to the side for extended periods of time, reducing the risk of injury.

[0035] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A centripetal rotatable operating cab for a workover rig, comprising an operating cab body (6), characterized in that: The operating room body (6) is connected to a rotating shaft A (5) at the bottom center. The rotating shaft A (5) is connected to one end of the rotating beam (3). The other end of the rotating beam (3) is connected to a rotating shaft C (9). The rotating shaft C (9) is connected to a fixed seat (7). The fixed seat (7) is fixed on the workover machine (14).

2. The centripetal rotatable operating cab for a workover rig according to claim 1, characterized in that: The workover machine (14) is connected to a telescopic cylinder (8), and the plunger end of the telescopic cylinder (8) is connected to the rotary beam (3).

3. The centripetal rotatable operating cab for a workover rig according to claim 1, characterized in that: The bottom side of the main body (6) of the operating room is connected to a rotating shaft B (1), the lower end of the rotating shaft B (1) is connected to one end of the pull rod (2), the other end of the pull rod (2) is connected to a rotating shaft D (10), and the rotating shaft D (10) is connected to a fixed seat (7).

4. The centripetal rotatable operating cab for a workover rig according to claim 1, characterized in that: One side of the slewing beam (3) is connected to an adjustable-length support leg (4) via a pin (11).

5. The centripetal rotatable operating cab for a workover rig according to claim 4, characterized in that: The outrigger (4) rotates around the pin (11) in the range of 0-90° and is locked in the vertical downward and horizontal directions.

6. The centripetal rotatable operating cab for a workover rig according to claim 1, characterized in that: The observation window of the main body (6) of the operating room is an outward-protruding arc shape.

7. The centripetal rotatable operating cab for a workover rig according to any one of claims 1-6, characterized in that: When the telescopic cylinder (8) retracts, the main body of the operating room (6) is located above the workover machine platform.

8. The centripetal rotatable operating cab for a workover rig according to claim 7, characterized in that: When the telescopic cylinder (8) extends, it pushes the rotary beam (3) to rotate along the shaft C (9), causing the main body of the operating room (6) to move to the outside of the workover machine (14). When the telescopic cylinder (8) extends to the limit position, the front observation window of the main body of the operating room (6) faces the center of the wellhead (13).

9. The centripetal rotatable operating cab for a workover rig according to claim 8, characterized in that: When the telescopic cylinder (8) extends to its limit position, rotate the outrigger (4) to the vertical downward position and adjust the length of the outrigger (4) so ​​that it supports the ground.

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