A new type of wellhead docking mechanism for rotary casing running device

Abstract

The present invention belongs to the field of wellhead docking, and in particular to a novel wellhead docking mechanism of a rotating casing lowering device. Aiming at the problems that the existing docking mechanism is large in size and inconvenient to carry, the following scheme is proposed, which comprises an annular plate, a plurality of rotating shafts are rotatably mounted on the outer side of the annular plate, an arc plate is fixedly mounted on the outer sides of the plurality of rotating shafts, a first support rod is fixedly mounted on the bottom of the plurality of arc plates, a slide groove is provided at the bottom of the plurality of first support rods, a second support rod is slidably mounted in the plurality of slide grooves, a locking mechanism is provided on the plurality of first support rods, a transmission mechanism is provided on the plurality of arc plates, an annular groove is provided at the bottom of the annular plate, an annular transmission plate is provided in the annular groove, an annular rack is fixedly mounted on the outer side of the annular transmission plate, a gear is fixedly sleeved on the outer sides of the plurality of rotating shafts, the present invention can fold the arc plate and shrink the second support rod, thereby reducing the occupied space and making it convenient to carry.

Description

Technical Field

[0001] The invention relates to the technical field of wellhead docking, and in particular to a novel wellhead docking mechanism of a rotary casing lowering device. Background Art

[0002] When large-diameter casing is installed in a drilling project, the large-diameter casing is usually not threaded and needs to be butt-welded at the wellhead. When the wellhead and the casing are butt-welded, a butt-welding mechanism is required to limit the position in order to prevent tilting.

[0003] The existing docking mechanism is large in size and inconvenient to carry, so we propose a new wellhead docking mechanism for a rotary casing running device to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art that the docking mechanism is large in size and inconvenient to carry, and to propose a new type of wellhead docking mechanism for a rotary casing lowering device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A new type of wellhead docking mechanism for a rotating casing lowering device comprises an annular plate, a plurality of rotating shafts are rotatably installed on the outer side of the annular plate, an arc-shaped plate is fixedly installed on the outer sides of the plurality of rotating shafts, a first support rod is fixedly installed on the bottom of the plurality of arc-shaped plates, a slide groove is provided at the bottom of the plurality of first support rods, a second support rod is slidably installed in the plurality of slide grooves, a locking mechanism is provided on the plurality of first support rods, a transmission mechanism is provided on the plurality of arc-shaped plates, an annular groove is provided at the bottom of the annular plate, an annular transmission plate is provided in the annular groove, an annular rack is fixedly installed on the outer side of the annular transmission plate, gears are fixedly sleeved on the outer sides of the plurality of rotating shafts, the plurality of gears are meshed with the annular rack, a locking bolt is threadedly installed on the annular transmission plate, and one end of the locking bolt contacts the inner wall of the annular groove.

[0007] Preferably, an annular limiting groove is provided on the inner wall of the annular groove, an annular limiting block is slidably installed in the annular limiting groove, and the annular limiting block is fixedly connected to the outer side of the annular transmission plate.

[0008] Preferably, the locking mechanism includes a movable plate, the movable plate is located in the slide groove, a locking block is fixedly installed on one side of the movable plate, a groove is provided on the top of the second support rod, the bottom of the movable plate extends into the groove, a locking groove is provided on the inner wall of one side of the groove, and the locking block is clamped in the locking groove.

[0009] Preferably, a limiting groove is provided on an inner wall of one side of the slide groove, a limiting block is slidably installed in the limiting groove, and one side of the limiting block is fixedly connected to the outer side of the second support rod.

[0010] Preferably, a sliding hole is provided at the top of the first support rod, the movable plate is slidably installed in the sliding hole, one end of the first spring is fixedly installed on one side of the movable plate, and the other end of the first spring is fixedly connected to an inner wall of one side of the sliding hole.

[0011] Preferably, the transmission mechanism includes an arc-shaped transmission rod, an arc-shaped groove is opened on one side of the arc-shaped plate, the outer side of the arc-shaped transmission rod is slidingly connected to the inner wall of the arc-shaped groove, one end of the arc-shaped transmission rod contacts the outer side of the annular plate, and the other end of the arc-shaped transmission rod contacts the movable plate.

[0012] Preferably, a connecting groove is provided at the bottom of the arc-shaped plate, the top of the movable plate extends into the connecting groove, and the other end of the arc-shaped transmission rod extends into the connecting groove.

[0013] Preferably, an arc-shaped reset groove is provided on the inner wall of the arc-shaped groove, an arc-shaped reset block is slidably installed in the arc-shaped reset groove, one end of a second spring is fixedly installed on one side of the arc-shaped reset block, the other end of the second spring is fixedly connected to the inner wall of one side of the arc-shaped reset groove, and the arc-shaped reset block is fixedly connected to the arc-shaped transmission rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Loosen the locking bolts to release the fixing of the annular transmission plate, and then rotate the annular transmission plate, the annular transmission plate drives the annular rack to rotate, the annular rack drives multiple gears to rotate, and the multiple gears drive multiple arc plates to fold;

[0016] The second spring is released from the contracted state, so that the arc-shaped reset block drives one end of the arc-shaped transmission rod to extend out of the arc plate, and the first spring is released from the stretched state, and the moving plate drives the locking block to disengage from the locking groove, pushing the second support rod upward, so that the second support rod can be retracted into the slide groove, reducing the occupied space and being easy to carry;

[0017] The present invention can fold the arc-shaped plate and shrink the second support rod, thereby reducing occupied space and being easy to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a wellhead docking mechanism of a novel rotary casing lowering device proposed by the present invention;

[0019] Figure 2 This is a bottom view structural schematic diagram of a wellhead docking mechanism of a novel rotary casing lowering device proposed by the present invention;

[0020] Figure 3 This is a structural schematic diagram of a new type of rotary casing running device proposed by the present invention, in which the arc plate of the wellhead docking mechanism is in a folded state;

[0021] Figure 4A novel wellhead docking mechanism for a rotating casing lowering device proposed by the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0022] Figure 5 A novel wellhead docking mechanism for a rotating casing lowering device proposed by the present invention Figure 1 A schematic diagram of the enlarged structure of part B;

[0023] Figure 6 A novel wellhead docking mechanism for a rotating casing lowering device proposed by the present invention Figure 1 Schematic diagram of the enlarged structure of part C.

[0024] In the figure: 1, annular plate; 2, rotating shaft; 3, arc plate; 4, gear; 5, annular groove; 6, annular transmission plate; 7, annular rack; 8, locking bolt; 9, first support rod; 10, slide groove; 11, second support rod; 12, moving plate; 13, locking block; 14, groove; 15, locking groove; 16, limiting groove; 17, limiting block; 18, first spring; 19, arc groove; 20, arc transmission rod; 21, arc reset groove; 22, arc reset block; 23, second spring; 24, connecting groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0026] Embodiment 1

[0027] Reference Figure 1-6 A novel wellhead docking mechanism for a rotary casing lowering device comprises an annular plate 1, a plurality of rotating shafts 2 are rotatably mounted on the outer side of the annular plate 1, an arc-shaped plate 3 is fixedly mounted on the outer side of the plurality of rotating shafts 2, a first support rod 9 is fixedly mounted on the bottom of the plurality of arc-shaped plates 3, a slide groove 10 is provided at the bottom of the plurality of first support rods 9, a second support rod 11 is slidably mounted in the plurality of slide grooves 10, a locking mechanism is provided on the plurality of first support rods 9, a transmission mechanism is provided on the plurality of arc-shaped plates 3, an annular groove 5 is provided at the bottom of the annular plate 1, an annular transmission plate 6 is provided in the annular groove 5, an annular rack 7 is fixedly mounted on the outer side of the annular transmission plate 6, a gear 4 is fixedly sleeved on the outer side of the plurality of rotating shafts 2, and the plurality of gears 4 are meshed with the annular rack 7, a locking bolt 8 is threadedly mounted on the annular transmission plate 6, and one end of the locking bolt 8 contacts the inner wall of the annular groove 5.

[0028] The annular transmission plate 6 can be fixed by the locking bolts 8 , and the rotation of the annular rack 7 causes the multiple gears 4 to rotate simultaneously, and the multiple gears 4 drive the multiple rotating shafts 2 to rotate, thereby folding the arc plate 3 .

[0029] In this embodiment, an annular limit groove is opened on the inner wall of the annular groove 5, and an annular limit block is slidably installed in the annular limit groove. The annular limit block is fixedly connected to the outer side of the annular transmission plate 6. The setting of the annular limit groove and the annular limit block enables the annular transmission plate 6 to move only in the annular groove 5.

[0030] In this embodiment, the locking mechanism includes a movable plate 12, which is located in the slide groove 10. A locking block 13 is fixedly installed on one side of the movable plate 12. A groove 14 is provided at the top of the second support rod 11. The bottom of the movable plate 12 extends into the groove 14. A locking groove 15 is provided on the inner wall of one side of the groove 14. The locking block 13 and the locking groove 15 are clamped together to fix the second support rod 11.

[0031] In this embodiment, a limiting groove 16 is opened on the inner wall of one side of the slide groove 10, and a limiting block 17 is slidably installed in the limiting groove 16. One side of the limiting block 17 is fixedly connected to the outer side of the second support rod 11. The setting of the limiting block 17 and the limiting groove 16 can control the moving distance of the second support rod 11.

[0032] In this embodiment, a sliding hole is opened at the top of the first support rod 9, and the movable plate 12 is slidably installed in the sliding hole. One end of the first spring 18 is fixedly installed on one side of the movable plate 12, and the other end of the first spring 18 is fixedly connected to the inner wall of one side of the sliding hole, and the movable plate 12 is reset by the first spring 18.

[0033] In this embodiment, the transmission mechanism includes an arc-shaped transmission rod 20, an arc-shaped groove 19 is opened on one side of the arc-shaped plate 3, the outer side of the arc-shaped transmission rod 20 is slidingly connected to the inner wall of the arc-shaped groove 19, one end of the arc-shaped transmission rod 20 contacts the outer side of the annular plate 1, and the other end of the arc-shaped transmission rod 20 contacts the movable plate 12.

[0034] In this embodiment, a connecting groove 24 is formed at the bottom of the arc-shaped plate 3 , the top of the moving plate 12 extends into the connecting groove 24 , and the other end of the arc-shaped transmission rod 20 extends into the connecting groove 24 .

[0035] In this embodiment, an arc-shaped reset groove 21 is provided on the inner wall of the arc-shaped groove 19, and an arc-shaped reset block 22 is slidably installed in the arc-shaped reset groove 21. One end of a second spring 23 is fixedly installed on one side of the arc-shaped reset block 22, and the other end of the second spring 23 is fixedly connected to the inner wall of one side of the arc-shaped reset groove 21. The arc-shaped reset block 22 is fixedly connected to the arc-shaped transmission rod 20, and the arc-shaped reset block 22 is reset by the second spring 23, thereby driving the arc-shaped transmission rod 20 to slide.

[0036] In the present invention, when in use, the annular plate 1 is supported above the wellhead by a plurality of second support rods 11, so that the annular plate 1 is aligned with the wellhead, and the casing is inserted into the annular plate 1, so that the casing can be vertically lowered to avoid tilting. After use, the locking bolt 8 is loosened to release the fixing of the annular transmission plate 6, and then the annular transmission plate 6 is rotated, and the annular transmission plate 6 drives the annular rack 7 to rotate, and the annular rack 7 drives the plurality of gears 4 to rotate, and the plurality of gears 4 drives the plurality of arc plates 3 to fold (such as Figure 3 ), at the same time, when the arc plate 3 is folded, the arc transmission rod 20 does not conflict with the outer side of the annular plate 1, and the second spring 23 is released from the contracted state, so that the arc reset block 22 drives one end of the arc transmission rod 20 to extend out of the arc plate 3, and the other end of the arc transmission rod 20 releases the squeezing of the movable plate 12, and the first spring 18 is released from the stretched state, and the movable plate 12 drives the locking block 13 to disengage from the locking groove 15, releasing the fixation of the second support rod 11, and then pushing the second support rod 11 upward, so that the second support rod 11 can be retracted into the slide groove 10, reducing the occupied space and making it easy to carry.

[0037] Embodiment 2

[0038] The difference from the first embodiment is that it includes an annular plate 1, a plurality of rotating shafts 2 are rotatably installed on the outer side of the annular plate 1, an arc plate 3 is fixedly installed on the outer sides of the plurality of rotating shafts 2, a first support rod 9 is fixedly installed on the bottom of the plurality of arc plates 3, a slide groove 10 is provided at the bottom of the plurality of first support rods 9, a second support rod 11 is slidably installed in the plurality of slide grooves 10, a locking mechanism is provided on the plurality of first support rods 9, a transmission mechanism is provided on the plurality of arc plates 3, an annular groove 5 is provided at the bottom of the annular plate 1, an annular transmission plate 6 is provided in the annular groove 5, an annular rack 7 is fixedly installed on the outer side of the annular transmission plate 6, a gear 4 is fixedly sleeved on the outer sides of the plurality of rotating shafts 2, and the plurality of gears 4 are meshed with the annular rack 7, a locking bolt 8 is threadedly installed on the annular transmission plate 6, one end of the locking bolt 8 is in contact with the inner wall of the annular groove 5, a level bubble meter is provided on the annular plate 1, and the annular plate 1 can be leveled by the level bubble meter.

[0039] The rest is the same as that of the first embodiment.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A novel wellhead docking mechanism for a rotary casing running device, comprising an annular plate (1), characterized in that: A plurality of rotating shafts (2) are rotatably mounted on the outer side of the annular plate (1), an arc-shaped plate (3) is fixedly mounted on the outer side of the plurality of rotating shafts (2), a first support rod (9) is fixedly mounted on the bottom of the plurality of arc-shaped plates (3), a sliding groove (10) is provided on the bottom of the plurality of first support rods (9), a second support rod (11) is slidably mounted in the plurality of sliding grooves (10), a locking mechanism is provided on the plurality of first support rods (9), a transmission mechanism is provided on the plurality of arc-shaped plates (3), an annular groove (5) is provided on the bottom of the annular plate (1), an annular transmission plate (6) is provided in the annular groove (5), an annular rack (7) is fixedly mounted on the outer side of the annular transmission plate (6), a gear (4) is fixedly sleeved on the outer side of the plurality of rotating shafts (2), the plurality of gears (4) are meshed with the annular rack (7), a locking bolt (8) is threadedly mounted on the annular transmission plate (6), one end of the locking bolt (8) is in contact with the inner wall of the annular groove (5); The inner wall of the annular groove (5) is provided with an annular limiting groove, in which an annular limiting block is slidably installed, and the annular limiting block is fixedly connected to the outer side of the annular transmission plate (6); The locking mechanism comprises a movable plate (12), the movable plate (12) is located in the slide groove (10), a locking block (13) is fixedly installed on one side of the movable plate (12), a groove (14) is provided on the top of the second support rod (11), the bottom of the movable plate (12) extends into the groove (14), a locking groove (15) is provided on the inner wall of one side of the groove (14), and the locking block (13) is clamped with the locking groove (15); A limiting groove (16) is provided on an inner wall of one side of the slide groove (10), a limiting block (17) is slidably installed in the limiting groove (16), and one side of the limiting block (17) is fixedly connected to the outer side of the second support rod (11); A sliding hole is provided at the top of the first support rod (9), and the movable plate (12) is slidably installed in the sliding hole. One end of a first spring (18) is fixedly installed on one side of the movable plate (12), and the other end of the first spring (18) is fixedly connected to an inner wall of one side of the sliding hole; The transmission mechanism comprises an arc-shaped transmission rod (20), an arc-shaped groove (19) is provided on one side of the arc-shaped plate (3), the outer side of the arc-shaped transmission rod (20) is slidably connected to the inner wall of the arc-shaped groove (19), one end of the arc-shaped transmission rod (20) contacts the outer side of the annular plate (1), and the other end of the arc-shaped transmission rod (20) contacts the movable plate (12); The inner wall of the arc-shaped groove (19) is provided with an arc-shaped reset groove (21), an arc-shaped reset block (22) is slidably mounted in the arc-shaped reset groove (21), one end of a second spring (23) is fixedly mounted on one side of the arc-shaped reset block (22), the other end of the second spring (23) is fixedly connected to the inner wall of one side of the arc-shaped reset groove (21), and the arc-shaped reset block (22) is fixedly connected to the arc-shaped transmission rod (20).

2. According to the novel wellhead docking mechanism of the rotary casing device of claim 1, it is characterized in that: A connecting groove (24) is provided at the bottom of the arc-shaped plate (3), the top of the movable plate (12) extends into the connecting groove (24), and the other end of the arc-shaped transmission rod (20) extends into the connecting groove (24).

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