Picking and conveying device of rotary control head bearing assembly

Abstract

The invention relates to the technical field of drilling equipment transfer, and discloses a rotary control head bearing assembly taking and conveying device which comprises a fixing sleeve and a double-inclined-face sliding ring, the double-inclined-face sliding ring is arranged outside the circumferential face of a limiting groove of a rotary control head bearing assembly in a sliding and sleeving mode, and the upper end face and the lower end face of the double-inclined-face sliding ring are each provided with an inclined face inclining inwards. The width of the upper end face of the double-slope sliding ring is equal to the depth of the limiting groove. The bearing assembly is sleeved with the fixing sleeve in a sliding mode, a lifting lug or a lifting ring is arranged at the upper end of the fixing sleeve, at least two sets of sliding locking assemblies are arranged on the periphery of the fixing sleeve, and the sliding locking assemblies can stretch out and draw back in the radial direction of the fixing sleeve and are locked so that the fixing sleeve can be tightly pressed outside the bearing assembly, and the bearing assembly can be prevented from being disengaged during well ascending and descending operation. The operation that a specially-assigned person goes up and down a well mouth to take and deliver the bearing assembly is liberated, the safety risk of manual climbing operation is avoided, the operation process is simplified, and the taking and delivering efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of the transfer of drilling equipment, and more specifically, to a device for taking and delivering a bearing assembly of a rotating control head. Background Art

[0002] A rotating control head is a general wellhead rotating blowout preventer device, which can seal drill pipes, drill collars, casings and other drilling tools through the elastic deformation of a rotating rubber core, and then seal substances such as dust, mud, oil and gas in the well, and force the above-mentioned wellbore return fluid to flow out, so as to ensure the safety of the wellhead and the drill floor.

[0003] During the drilling operation, the operation of taking out the bearing assembly of the rotating control head from the wellhead and sending it into the wellhead will be carried out many times. At present, the above operation process requires a special person to climb the safety ladder up and down the wellhead many times to complete. The labor intensity of the personnel is large, the operation time is long, and the danger is high, and there is a high risk of personal safety.

[0004] In summary, how to provide a safe and convenient method for taking and delivering the bearing assembly of the rotating control head is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a device for taking and delivering a bearing assembly of a rotating control head, which liberates the operation of a special person to take and deliver the bearing assembly up and down the wellhead, not only avoids the safety risk of manual climbing operation, but also simplifies the operation process and improves the taking and delivering efficiency.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A device for taking and delivering a bearing assembly of a rotating control head includes a fixed sleeve and a double-bevel sliding ring. The double-bevel sliding ring is slidably sleeved outside the circumferential surface of the limiting groove of the bearing assembly of the rotating control head. The upper and lower end faces of the double-bevel sliding ring are both provided with inclined planes that incline inwards. The width of the upper end face of the double-bevel sliding ring is equal to the depth of the limiting groove;

[0008] The fixed sleeve is slidably sleeved outside the bearing assembly. The upper end of the fixed sleeve is provided with a lifting lug or a lifting ring. At least two groups of sliding locking assemblies are arranged on the outer peripheral part of the fixed sleeve. The sliding locking assemblies can expand and contract along the radial direction of the fixed sleeve and lock, so as to press the fixed sleeve outside the bearing assembly and prevent the bearing assembly from coming out during the operation of going up and down the well.

[0009] Preferably, the sliding locking assembly includes a telescopic rod, a return spring and a hollow plug. The telescopic rod is installed in the through hole of the fixed sleeve, and the hollow plug is sleeved between the telescopic rod and the through hole;

[0010] The reset spring is sleeved outside the telescopic rod. One end of the reset spring abuts against the hollow plug, so as to press the telescopic rod against the circumferential surface of the limiting groove by using the reset spring.

[0011] Preferably, a lower inclined surface is provided at the free end of the telescopic rod relatively far from the hollow plug, and the lower inclined surface can be attached to the lower inclined surface of the double inclined surface sliding ring.

[0012] Preferably, an inclined guiding surface is provided at the top end of the bearing assembly, and the inclination angle of the inclined guiding surface is the same as the inclination angle of the lower inclined surface of the telescopic rod.

[0013] Preferably, the double inclined surface sliding ring includes a pair of symmetrically arranged semi-circular sliding rings and at least two locking members, and the locking members are used to axially connect the two semi-circular sliding rings.

[0014] Preferably, the sliding locking assemblies are uniformly arranged along the circumferential direction of the fixed sleeve.

[0015] Preferably, a plurality of threaded mounting holes are provided on the top surface of the fixed sleeve, and the lifting lug or the lifting ring is threadedly mounted in the threaded mounting holes.

[0016] Preferably, the lifting lugs or the lifting rings are uniformly distributed along the circumferential direction of the bearing assembly.

[0017] For the picking and delivering device of the rotary control head bearing assembly provided by the present invention, the sliding locking assembly can telescopically extend and lock in the radial direction, and can press the fixed sleeve against the limiting groove of the bearing assembly. Therefore, the picking and delivering operation of the rotary control head bearing assembly can be realized by means of hoisting. Compared with manually climbing the safety ladder to pick and deliver up and down the wellhead, the labor intensity of personnel is effectively reduced, the safety risk of manual picking and delivering is avoided, the on-site operation process is simplified, and the picking and delivering efficiency of the rotary control head bearing assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0019] Figure 1 is a schematic structural diagram of the picking and delivering device of the rotary control head bearing assembly provided by the present invention;

[0020] Figure 2 is an assembly schematic diagram of the rotary control head bearing assembly and the picking and delivering device.

[0021] Figure 1 - Figure 2 In which:

[0022] 01 is the bearing assembly, 1 is the fixed sleeve, 2 is the lifting lug, 31 is the telescopic rod, 32 is the return spring, 33 is the hollow plug, and 4 is the double-bevel sliding ring. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0024] The core of the present invention is to provide a device for taking and delivering a bearing assembly of a rotary control head, which liberates the operation of specially assigned personnel to take and deliver the bearing assembly up and down the wellhead, not only avoids the safety risks of manual climbing operations, but also simplifies the operation process and improves the taking and delivering efficiency.

[0025] It should be noted that in this application document, the outward extension of the sliding telescopic assembly means that its free end is relatively close to the circumferential surface of the bearing assembly 01, and the inward retraction means that its free end is relatively far from the circumferential surface of the bearing assembly 01.

[0026] The device for taking and delivering a bearing assembly of a rotary control head provided by the present invention includes a fixed sleeve 1 and a double-bevel sliding ring 4. The double-bevel sliding ring 4 is slidably sleeved outside the circumferential surface of the limit groove of the bearing assembly 01 of the rotary control head. Inclined slopes are provided on the upper and lower end faces of the double-bevel sliding ring 4, and the width of the upper end face of the double-bevel sliding ring 4 is equal to the depth of the limit groove;

[0027] The fixed sleeve 1 is slidably sleeved outside the bearing assembly 01. A lifting lug 2 or a lifting ring is provided at the upper end of the fixed sleeve 1. At least two groups of sliding locking assemblies are provided on the outer peripheral part of the fixed sleeve 1. The sliding locking assemblies can be telescopically extended and locked along the radial direction of the fixed sleeve 1 so as to press the fixed sleeve 1 against the outside of the bearing assembly 01 and prevent the bearing assembly 01 from coming off during the operation of going up and down the well.

[0028] Please refer to Figure 1 , in order to facilitate the hoisting of the bearing assembly 01 of the rotary control head, a lifting lug 2 or a lifting ring is provided at the upper end of the fixed sleeve 1 so as to be connected to the hoisting equipment. It should be noted that the hoisting equipment here is not limited to hoisting equipment such as winches, but also includes common drilling construction machinery such as drill pipes.

[0029] The lifting lug 2 or the lifting ring can be connected to the fixed sleeve 1 by means of threaded connection, can also be welded to the fixed sleeve 1, or can be integrally formed with the fixed sleeve 1; considering the connection strength and cost comprehensively, usually a plurality of threaded mounting holes are provided on the top surface of the fixed sleeve 1, and the lifting lug 2 or the lifting ring is threadedly mounted in the threaded mounting holes, and the connection structure is simple and the connection strength is high.

[0030] The specific number, structure, dimensions and connection method of the lifting lugs 2 and the lifting rings are determined according to factors such as the type of lifting equipment and the weight of the bearing assembly 01 of the rotary control head in actual production.

[0031] It should be noted that in order to make the bearing assembly 01 of the rotary control head bear force evenly and avoid bumping against the wellbore during up and down lifting, preferably, the lifting lugs 2 or the lifting rings can be arranged evenly along the circumferential direction of the bearing assembly 01 of the rotary control head.

[0032] In order to effectively clamp the fixing sleeve 1 outside the bearing assembly 01 of the rotary control head, a sliding locking assembly is provided on its outer peripheral part. The sliding locking assembly is used to provide a radial pressing force to press the fixing sleeve 1 against the outer peripheral surface of the bearing assembly 01, so that the two are closely and stably connected to ensure the connection stability and lifting safety.

[0033] In order to reduce the bumping between the fixing sleeve 1 and the bearing assembly 01, at least two groups of sliding locking assemblies are provided on the outer peripheral part of the fixing sleeve 1. Compared with only setting one group of sliding locking assemblies, the collision risk between the fixing sleeve 1 and the bearing assembly 01 is greatly reduced.

[0034] The specific number of the sliding locking assemblies is determined according to factors such as the weight of the bearing assembly 01 and the dimensions of the fixing sleeve 1 in actual production to ensure the stable connection between the fixing sleeve 1 and the bearing assembly 01; in order to make the pressing force received by the bearing assembly 01 relatively uniform in all directions, usually the sliding locking assemblies are arranged evenly along the circumferential direction of the fixing sleeve 1.

[0035] For example, when two groups of sliding locking assemblies are provided on the fixing sleeve 1, the two groups of sliding locking assemblies are respectively arranged at both ends of the diameter of the fixing sleeve 1, as Figure 1 shown. On the one hand, it can make the force on the bearing assembly 01 relatively uniform, and on the other hand, it can effectively reduce the collision risk of the bearing assembly 01.

[0036] Furthermore, the diameter of the through hole of the fixing sleeve 1 can be set larger than the outer diameter of the limiting groove of the bearing assembly 01, and the inner peripheral surface of the fixing sleeve 1 always keeps a certain distance from the outer peripheral surface of the bearing assembly 01, avoiding the collision and damage of the bearing assembly 01.

[0037] The double-bevel sliding ring 4 is sleeved outside the circumferential surface of the limiting groove of the bearing assembly 01, and inclined surfaces are provided on both its upper and lower end surfaces and incline inward. The double-bevel design enables the sliding locking assembly to drive the double-bevel sliding ring 4 to slide up and down relative to the circumferential surface of the limiting groove, and further drives the sliding locking assembly to slide up and down along the circumferential surface of the limiting groove.

[0038] The material of the double inclined plane slip ring 4 shall refer to the slip rings commonly used in existing downhole operations to ensure a long service life. Considering the assembly problem, the double inclined plane slip ring 4 is provided with at least one opening, and the opening is locked and connected through a connecting piece.

[0039] Please refer to Figure 1 , the double inclined plane slip ring 4 includes a pair of symmetrically arranged semi-circular slip rings and at least two locking pieces. The locking pieces are used to axially connect the two semi-circular slip rings, and the locking pieces can be specifically set as common connecting pieces such as fastening bolts and connecting pins.

[0040] The width of the upper end face of the double inclined plane slip ring 4 is equal to the depth of the limiting groove. Therefore, when the upper end face of the double inclined plane slip ring 4 abuts against the upper end face of the limiting groove, the sliding locking assembly slides upward along the upper inclined plane and retracts inward in the radial direction. Finally, the sliding locking assembly moves along the upper inclined plane to the circumferential surface above the limiting groove.

[0041] During the operation of taking out of the well, control the pick-up and delivery device to descend along with the drill pipe to above the bearing assembly 01, so that the free end of the telescopic locking assembly abuts against the circumferential surface of the bearing assembly 01. Then control the pick-up and delivery device to continue descending. After the telescopic locking assembly descends to the limiting groove, the self-weight of the fixed sleeve 1 pushes the telescopic locking assembly to slide downward into the double inclined plane slip ring 4. Under the action of the radial pressing force, the telescopic locking assembly extends outward, so that the free end of the telescopic locking assembly abuts against the circumferential surface of the double inclined plane slip ring 4. At this time, the length of the telescopic locking assembly exposed outside the fixed sleeve 1 is shortened. Based on this, the wellhead personnel can judge that the pick-up and delivery device has reached the position. At this time, lifting the pick-up and delivery device can lift the bearing assembly 01 out of the wellhead.

[0042] During the operation of entering the well, on the drilling platform, sleeve the fixed sleeve 1 outside the bearing assembly 01 so that the telescopic locking assembly abuts against the circumferential surface of the bearing assembly 01 above the limiting groove. Then control the two to descend into the well along with the drill pipe. When the bearing assembly 01 is located on the base device at the inlet, continue to lower the pick-up and delivery device. After the telescopic locking assembly abuts against the upper end face of the double inclined plane slip ring 4, then the telescopic locking assembly enters the double inclined plane slip ring 4 along the upper inclined plane of the double inclined plane slip ring 4. Since the outer diameter of the double inclined plane slip ring 4 is smaller than the outer diameter of the bearing assembly 01, at this time, the length of the telescopic locking assembly exposed outside the fixed sleeve 1 is shortened. Based on this, the wellhead personnel can judge that the bearing assembly 01 has reached the position. Then lift the pick-up and delivery device. The telescopic locking assembly drives the double inclined plane slip ring 4 to slide upward along the limiting groove. After the upper end face of the double inclined plane slip ring 4 abuts against the upper end face of the limiting groove, the telescopic locking assembly moves upward along the upper inclined plane of the double inclined plane slip ring 4 to the circumferential surface above the limiting groove. Then the telescopic locking assembly continues to move upward until it is completely separated from the bearing assembly 01, completing the operation of entering the well.

[0043] In this embodiment, the sliding locking assembly can be telescopically extended and locked in the radial direction, and can press the fixed sleeve 1 against the limiting groove of the bearing assembly 01. Therefore, the operation of the rotary control head bearing assembly 01 entering and exiting the well can be realized by means of hoisting. Compared with manually climbing the safety ladder to pick up and deliver at the wellhead, the labor intensity of personnel is effectively reduced, the safety risk of manual pick-up and delivery is avoided, the on-site operation process is simplified, and the pick-up and delivery efficiency of the rotary control head bearing assembly 01 is improved.

[0044] Based on the above embodiment, the structure of the sliding locking assembly is defined. The sliding locking assembly includes a telescopic rod 31, a return spring 32 and a hollow plug 33. The telescopic rod 31 is installed in the through hole of the fixed sleeve 1, and the hollow plug 33 is sleeved between the telescopic rod 31 and the through hole;

[0045] The return spring 32 is sleeved outside the telescopic rod 31, and one end of the return spring 32 abuts against the hollow plug 33, so as to use the return spring 32 to press the telescopic rod 31 against the circumferential surface of the limiting groove.

[0046] Wherein, the telescopic rod 31 can reciprocally slide in the radial direction of the fixed sleeve 1 under the action of the return spring 32, and the hollow plug 33 is used to press the return spring 32 against the limiting step surface of the through hole, so that the return spring 32 has a pre-tightening force on the telescopic rod 31 pointing radially towards the bearing assembly 01.

[0047] The specific materials, structures, shapes and dimensions of the telescopic rod 31, the return spring 32 and the hollow plug 33 are determined by checking and calculating with reference to the design connection strength requirements of the pick-up and delivery device and the rotary control head bearing assembly 01 according to the actual production needs.

[0048] In this embodiment, the telescopic rod 31 cooperates with the return spring 32 to realize the radial telescopic and locking of the telescopic rod 31, with a simple structure, and high safety and reliability.

[0049] Preferably, a lower inclined surface can be provided at the free end of the telescopic rod 31 relatively far from the hollow plug 33, and the lower inclined surface can be fitted with the lower inclined surface of the double inclined surface sliding ring 4, so that the telescopic rod 31 drives the double inclined surface sliding ring 4 to slide downward through the close fitting of the two lower inclined surfaces.

[0050] Based on the above embodiment, an inclined guiding surface can be provided at the top end of the bearing assembly 01, and the inclination angle of the inclined guiding surface is the same as the inclination angle of the lower inclined surface of the telescopic rod 31.

[0051] Therefore, after the lower inclined surface of the telescopic rod 31 contacts the above-mentioned inclined guiding surface, as the telescopic rod 31 descends, the telescopic rod 31 is gradually squeezed by the inclined guiding surface and retracts inward. Compared with the telescopic rod 31 directly retracting to abut against the circumferential surface above the limiting groove under the action of resistance, the telescopic of the telescopic rod 31 is smoother, facilitating the free end of the telescopic rod 31 to abut against the circumferential surface above the limiting groove of the bearing assembly 01.

[0052] During the operation of taking out of the well, control the picking and delivering device to descend along with the drill pipe to above the bearing assembly 01, so that the free end of the telescopic rod 31 contacts the inclined guiding surface of the bearing assembly 01. When continuing to descend, the telescopic rod 31 is squeezed by the inclined guiding surface and gradually retracts radially; when the telescopic rod 31 descends to disengage from the inclined guiding surface, under the action of the return spring 32, the telescopic rod 31 abuts against the circumferential surface of the bearing assembly 01; then control the picking and delivering device to continue descending. After the telescopic rod 31 descends to the limiting groove, the self-weight of the fixed sleeve 1 pushes the telescopic rod 31 to slide downward into the double-inclined surface sliding ring 4. The telescopic rod 31 extends outward under the action of the return spring 32, so that the free end of the telescopic rod 31 abuts against the circumferential surface of the double-inclined surface sliding ring 4. At this time, the length of the telescopic rod 31 exposed from the fixed sleeve 1 is shortened. Based on this, the wellhead personnel can judge that the picking and delivering device is in place. At this time, lifting the picking and delivering device can lift the bearing assembly 01 out of the wellhead.

[0053] During the operation of lowering into the well, at the drilling platform, sleeved the fixed sleeve 1 outside the bearing assembly 01, so that the telescopic rod 31 abuts against the circumferential surface of the bearing assembly 01 above the limiting groove, and then control the two to lower into the well along with the drill pipe; when the bearing assembly 01 is located on the base device at the inlet, continue to lower the picking and delivering device. After the telescopic rod 31 abuts against the upper end surface of the double-inclined surface sliding ring 4, then the telescopic rod 31 enters the double-inclined surface sliding ring 4 along the upper inclined surface of the double-inclined surface sliding ring 4. Since the outer diameter of the double-inclined surface sliding ring 4 is smaller than the outer diameter of the bearing assembly 01, at this time, the length of the telescopic rod 31 exposed from the fixed sleeve 1 is shortened. Based on this, the wellhead personnel can judge that the bearing assembly 01 is in place; then lift the picking and delivering device. The telescopic rod 31 drives the double-inclined surface sliding ring 4 to slide upward along the limiting groove. After the upper end surface of the double-inclined surface sliding ring 4 abuts against the upper end surface of the limiting groove, the telescopic rod 31 moves upward along the upper inclined surface of the double-inclined surface sliding ring 4 to the circumferential surface above the limiting groove, and then the telescopic rod 31 continues to move upward until it is completely separated from the bearing assembly 01, completing the operation of lowering into the well.

[0054] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0055] The above has introduced in detail the device for taking and delivering the rotary control head bearing assembly provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A device for taking and delivering a rotary control head bearing assembly, characterized in that, it includes a fixed sleeve (1) and a double-bevel slip ring (4). The double-bevel slip ring (4) is slidably sleeved outside the circumferential surface of the limiting groove of the bearing assembly (01) of the rotary control head. The upper and lower end surfaces of the double-bevel slip ring (4) are both provided with inclined surfaces that incline inwards. The width of the upper end surface of the double-bevel slip ring (4) is equal to the depth of the limiting groove; The fixed sleeve (1) is slidably sleeved outside the bearing assembly (01). A lifting lug (2) or a lifting ring is provided at the upper end of the fixed sleeve (1). At least two sets of sliding locking assemblies are provided on the outer peripheral part of the fixed sleeve (1). The sliding locking assemblies can expand and contract along the radial direction of the fixed sleeve (1) and lock, so as to press the fixed sleeve (1) outside the bearing assembly (01) and prevent the bearing assembly (01) from coming off during up and down well operations.

2. The device for taking and delivering a rotary control head bearing assembly according to claim 1, characterized in that, the sliding locking assembly includes a telescopic rod (31), a return spring (32) and a hollow plug (33). The telescopic rod (31) is installed in the through hole of the fixed sleeve (1), and the hollow plug (33) is sleeved between the telescopic rod (31) and the through hole; The return spring (32) is sleeved outside the telescopic rod (31). One end of the return spring (32) abuts against the hollow plug (33), so as to press the telescopic rod (31) against the circumferential surface of the limiting groove by using the return spring (32).

3. The device for taking and delivering a rotary control head bearing assembly according to claim 2, characterized in that, a lower inclined surface is provided at the free end of the telescopic rod (31) relatively far from the hollow plug (33), and the lower inclined surface can be attached to the lower inclined surface of the double-bevel slip ring (4).

4. The device for taking and delivering a rotary control head bearing assembly according to claim 3, characterized in that, an inclined guiding surface is provided at the top end of the bearing assembly (01), and the inclination angle of the inclined guiding surface is the same as the inclination angle of the lower inclined surface of the telescopic rod (31).

5. The device for taking and delivering a rotary control head bearing assembly according to any one of claims 1-4, characterized in that, the double-bevel slip ring (4) includes a pair of symmetrically arranged semi-circular slip rings and at least two locking parts, and the locking parts are used for axially connecting the two semi-circular slip rings.

6. The device for taking and delivering a rotary control head bearing assembly according to any one of claims 1-4, characterized in that, the sliding locking assemblies are uniformly arranged along the circumferential direction of the fixed sleeve (1).

7. The device for taking and delivering a rotary control head bearing assembly according to any one of claims 1-4, characterized in that, a plurality of threaded mounting holes are provided on the top surface of the fixed sleeve (1), and the lifting lug (2) or the lifting ring is threadedly mounted in the threaded mounting holes.

8. The device for taking and delivering a rotary control head bearing assembly according to any one of claims 1-4, characterized in that, the lifting lugs (2) or the lifting rings are uniformly distributed along the circumferential direction of the bearing assembly (01).

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