Oil pipe conveying device for well repair site

Abstract

The invention belongs to the technical field of oil field well repair, particularly discloses an oil pipe conveying device for a well repair site, and aims to solve the problems of high manual operation intensity and low overall efficiency in oil pipe conveying operation on the well repair site. The device specifically comprises a base, a supporting arm, a connecting sleeve and a detachable clamping, driving and fixing assembly. Horizontal movement of the supporting arm is achieved through the sliding assembly, the first lead screw and the first motor control the clamping height, and the rotating assembly adjusts the angle of the supporting frame. The clamping assembly grabs the oil pipe through a first arc-shaped claw with a ball and allows the oil pipe to rotate. The driving assembly controls opening and closing of the second arc-shaped claw through a second hydraulic cylinder and is provided with a rotatable arc-shaped plate to drive the oil pipe to be buckled and screwed. The fixing assembly fixes an in-well oil pipe through the third arc-shaped claw. According to the device, the oil pipe can be grabbed, translated, buckled and screwed from the pipe rack to a well mouth, the labor intensity of workers is greatly reduced, the operation efficiency and safety are improved, and the device is suitable for lowering and pulling out the oil pipe on a well repair site.

Description

Technical Field

[0001] This invention relates to the field of oilfield well workover technology, specifically to an oil pipe delivery device for well workover sites. Background Technology

[0002] At oilfield workover sites, tubing serves as the core channel connecting underground oil layers and surface equipment. Its handling, transport, and movement up and down the drilling rig are indispensable and extremely frequent operations in the workover process. Currently, most workover sites employ a traditional manual labor-assisted crane or workover winch operation mode. Specifically, the tubing is first manually rolled one by one from the surface pipe rack to below the wellhead. Then, it is hooked together using wire ropes. The operator then directs the crane to lift it, and with the coordinated efforts of several wellhead workers, the tubing is hoisted above the wellhead operating plane. The external threaded end of the tubing is aligned with the internal threaded end of the lowered tubing. The operator then tightens the two tubing sections using tools. Finally, a hydraulic press at the top presses the tubing down, completing the tubing lowering process. The tubing raising and lowering processes are simply the reverse of each other.

[0003] This traditional operating mode has drawbacks. A standard oil pipe can be nearly ten meters long and weigh 95 kilograms. When workers push, pull, and straighten it, the manual labor intensity is high. The entire process relies on the coordination of multiple people and the frequent lifting and lowering of cranes. Any delay in any step will affect the overall operation progress and cannot meet the efficiency requirements of modern well workover operations. Summary of the Invention

[0004] The purpose of this invention is to provide an oil pipe delivery device for well workover sites to solve the problems of high labor intensity and low overall efficiency in manual operation modes.

[0005] To achieve the above objectives, the basic solution provided by this invention is as follows: a tubing delivery device for well workover sites, comprising a base, a support arm, a connecting sleeve, a clamping assembly, and a driving assembly. The base is provided with a sliding assembly for the support arm to slide along the base surface. A rotating assembly and a lifting assembly for rotating and raising the connecting sleeve are respectively provided between the connecting sleeve and the support arm. A support frame is provided on the connecting sleeve. The clamping assembly includes a connecting seat, which is detachably connected to the support frame. A support seat is fixedly connected to the connecting seat. Two arc-shaped claws for clamping the tubing are hinged to the support seat. Two clamping sleeves are screwed to each arc-shaped claw. A plurality of ball bearings are rollingly connected between the two clamping sleeves. Each arc-shaped claw... Hydraulic cylinders are hinged to each of the connecting seats. The drive assembly includes a connecting seat 2, which is detachably connected to the support frame. A support seat 2 is detachably connected to the connecting seat 2. Two arc-shaped claws 2 are hinged to the support seat 2. Each arc-shaped claw 2 has an arc-shaped groove on its inner side that is interconnected when closed. An arc-shaped plate is slidably connected in each arc-shaped groove. Several cylindrical rollers are rollingly connected at the abutment of each arc-shaped plate and the arc-shaped groove. Each arc-shaped claw 2 is provided with a limiting unit for limiting the arc-shaped plate when the arc-shaped claw 2 opens. A drive unit for driving the arc-shaped plate to rotate is provided on the arc-shaped claw 2. Hydraulic cylinders 2 are hinged between each arc-shaped claw 2 and the connecting seat 2. The support frame is provided with a fixing assembly for fixing and clamping the oil pipe in the well.

[0006] The working principle of this invention is as follows: First, the base of the entire device is placed stably between the wellhead and the surface pipe rack. When the tubing needs to be lowered, the operator controls the sliding assembly to position the clamping assembly and drive assembly at the end of the support frame above the appropriate position of the tubing. Then, the rotating assembly is activated to drive the entire connecting sleeve and support frame to rotate until the support frame is parallel to the tubing. Next, the lifting assembly is activated to drive the support frame to descend along the support arm, while simultaneously controlling the retraction of two hydraulic cylinders (cylinder 1 and cylinder 2), pulling the two arc-shaped claws (claw 1 and claw 2) to open. When the arc-shaped claws are open, the limiting unit restricts the sliding of the arc plate. After the two arc-shaped claws descend to hold the tubing, the two hydraulic cylinders extend, pushing the two arc-shaped claws to close, firmly holding the tubing. When the arc-shaped claws are closed, the limiting unit releases the restriction on the sliding of the arc plate. At the same time, the ball bearings on the inner side of the arc-shaped claws allow relative rolling between the tubing and the arc-shaped claws during subsequent rotation, while the tubing is holding the tubing.

[0007] Next, the lifting assembly is reversed to raise the gripping tubing to a safe height. Then, the rotating assembly is reversed to make the tubing perpendicular to the ground. Then, the sliding assembly is controlled again to horizontally transport the tubing from the tubing rack position to directly above the wellhead. During this stage, the stationary assembly is in the open state and does not participate in the tubing transport. When the tubing reaches the top of the wellhead, firstly, control the extension of two hydraulic cylinders to close the two arc-shaped claws, tightly gripping the upper tubing already installed at the wellhead. Then, control motor one to slowly lower the tubing. When the lower end (external thread end) of the tubing abuts against the upper end (internal thread end) of the tubing at the wellhead, the descent stops. Then, start the drive unit to rotate the two arc-shaped plates. The arc-shaped plates roll and rotate through the cylindrical rollers and arc-shaped grooves. The rotating arc-shaped plates drive the tubing to screw into the upper end of the tubing at the wellhead. After the tubing has rotated a fixed number of turns, the upper tubing is threadedly connected to the tubing at the wellhead. The arc-shaped plates return to their initial position. Next, control hydraulic cylinder two to retract, causing arc-shaped claw two to open. When it opens, the limiting unit limits the arc-shaped plates. Then, control hydraulic cylinder one and hydraulic cylinder three to retract, causing arc-shaped claw one and arc-shaped claw three to open, releasing the fixation on the tubing. Finally, the hydraulic press at the top presses down the tubing, completing the tubing lowering process. Finally, the support arm is moved back to the ground pipe rack position using the sliding assembly, ready to grab the next pipe, and the above process is repeated. The workflow for loading and unloading pipes is the reverse of the workflow for unloading pipes.

[0008] The beneficial effects of this invention are as follows: by setting a movable base, support arm, rotatable connecting sleeve, and clamping, driving, and fixing components, a set of tubing delivery devices is constituted. The clamping component uses an arc-shaped claw with ball bearings to stably grip the tubing; the driving component cooperates with a hydraulic cylinder through an independently rotatable arc-shaped plate to firmly clamp the tubing and actively drive the tubing to rotate, achieving precise alignment; the fixing component is used to stabilize the tubing in the well during operation. This significantly reduces the intensity and difficulty of manual handling, straightening, and alignment, integrating multiple scattered operation links into a single device, and significantly improving the efficiency and safety of tubing delivery and alignment operations.

[0009] Option 2, which is a preferred option of the basic option, includes a connecting seat 3, which is detachably connected to the support frame. A support seat 3 is fixedly connected to the connecting seat 3, and two arc-shaped claws 3 are hinged to the support seat 3. A hydraulic cylinder 3 is hinged between each arc-shaped claw 3 and the connecting seat 3.

[0010] Option 3, a preferred embodiment of the basic option, involves a rotating assembly comprising a sleeve. One end of the sleeve is connected to a sliding plate, and the other end of the sleeve is bearing-connected to a rotating column. One end of the rotating column is connected to a connecting sleeve. The connecting sleeve is equipped with two motors (4), each motor (4) having a gear (5). A gear ring (1) is located on the outer wall of the sleeve, and each gear (5) meshes with the gear ring (1). The two motors (4) and gears (5) work together to drive the gear ring (1), causing the connecting sleeve to rotate, thus allowing the oil pipe to rotate during lifting or lowering.

[0011] Option 4, which is a preferred embodiment of Option 3, includes a motor, a sliding groove on the support arm, a sliding plate slidably connected to the sliding groove, a lead screw rotatably connected inside the sliding groove, the lead screw threadedly connected to the sliding plate, the motor fixedly connected to the top of the support arm, and the end of the lead screw extending outside the support arm fixedly connected to the motor.

[0012] Option 5, a preferred embodiment of the basic option, includes a sliding assembly comprising a slide rail detachably connected to the base. The bottom of the support arm has a base slidably connected to the slide rail. Two rotating shafts are rotatably connected to both sides of the base, each shaft having a roller that is rolled along the slide rail. Gear 1 and Gear 2 are mounted on one shaft of the base, meshed by a chain. Gear 3 is mounted on the other shaft of the base. A motor 2 is mounted on the base, with a gear 4 on it, meshing with Gear 3. A fixed rod is mounted on the slide rail, and a through hole is formed in the base that slidably connects to the fixed rod. The motor 2 drives the chain and gear assembly, causing the rollers on both sides of the base to move synchronously and smoothly along the slide rail, achieving linear movement of the support arm in a single direction on the base. The cooperation between the fixed rod and the through hole enhances the torsional resistance and guidance of the base during movement, preventing the support arm from shifting or wobbling when carrying the oil pipe.

[0013] Option 6, a preferred embodiment of Option 5, involves a sliding connection between the slide rail and the base. The sliding direction of the slide rail and base is perpendicular to the sliding direction of the base and the slide rail. Two lead screws are rotatably connected to the base, and the base is threadedly connected to the lead screws. Two motors are located on one side of the base, and one end of each lead screw extending outside the base is fixedly connected to one of the motors. This allows for vertical sliding between the slide rail and the base, driven by the lead screws and motors, enabling position adjustment of the support arm and the entire gripping mechanism in a two-dimensional plane, thus enhancing the adaptability of the device.

[0014] Option 7, a preferred embodiment of Option 2, involves connecting seat 1, connecting seat 2, and connecting seat 3 all being bolted to the support frame. The support frame has threaded holes for bolting connecting seat 1, connecting seat 2, and connecting seat 3. This allows for quick replacement and adjustment of the clamping, driving, and fixing components.

[0015] Option 8, a preferred embodiment of the basic option, includes two wedge-shaped blocks. Each of the two arc-shaped claws has a wedge-shaped groove. The wedge-shaped block is located within and hinged to the wedge-shaped groove. Each wedge-shaped groove communicates with the arc-shaped groove. One end of each wedge-shaped block extends into the arc-shaped groove to restrict the sliding of the cylindrical roller. A tension spring is provided between each wedge-shaped block and the wedge-shaped groove. Each of the two arc-shaped claws is equipped with a push rod for pushing the wedge-shaped block to release the restriction on the arc-shaped plate. When the two arc-shaped claws open to engage or release the oil pipe, the wedge-shaped block pops out and partially extends into the arc-shaped groove under the action of the tension spring, thereby restricting the arc-shaped plate from sliding along the arc-shaped groove. When it is necessary to clamp and drive the oil pipe to rotate, the push rod actuates, pushing the wedge-shaped block back into the wedge-shaped groove, releasing the restriction on the arc-shaped plate. At this time, the arc-shaped plate can rotate freely under the action of the drive unit, realizing the switching between clamping and rotation states.

[0016] Option 9, a preferred embodiment of the basic option, includes a drive unit comprising two motors (5), each motor (5) fixedly connected to two arc-shaped claws (2). Each arc-shaped plate is equipped with a gear ring (2), and each motor (5) has a gear (6) meshing with the gear ring (2). By independently configuring motors (5) and gears (6) on each arc-shaped claw (2), the motors directly drive the arc-shaped plate with the gear ring (2) to rotate, allowing the two arc-shaped plates to rotate synchronously and in the same direction. This, in turn, drives the clamped oil pipe to rotate stably, providing sufficient torque to tighten or loosen the oil pipe threads.

[0017] Option 10, a preferred embodiment of the basic option, features a limiting groove on the connecting seat 2. The supporting seat 2 is slidably connected to the limiting groove. Both the upper and lower ends of the connecting seat 2 are equipped with fixing plates. Several telescopic rods are positioned between each fixing plate and the supporting seat 2, and each telescopic rod is fitted with a compression spring. When the drive assembly clamps the oil pipe for rotational engagement, the internal thread of the lower oil pipe will experience axial displacement during the screwing process, causing the oil pipe to move downwards as a whole. The elastic structure allows the supporting seat 2 and the entire arc-shaped claw 2 to overcome the resistance of the compression springs and slide slightly downwards synchronously with the oil pipe, compensating for the axial travel generated during tightening. Attached Figure Description

[0018] Figure 1 This is a perspective view of an oil pipe delivery device for well workover sites according to the present invention;

[0019] Figure 2 This is a perspective view of another angle of the oil pipe delivery device for well workover site according to the present invention;

[0020] Figure 3 This is a schematic diagram of the support arm in a well workover site tubing delivery device of the present invention;

[0021] Figure 4 This is a schematic diagram of the clamping component in a tubing delivery device for well workover sites according to the present invention;

[0022] Figure 5 This is a schematic diagram of the drive component in a well workover site tubing delivery device according to the present invention;

[0023] Figure 6 This is a schematic diagram of the arc-shaped claws in a well workover site tubing delivery device of the present invention when they are open;

[0024] Figure 7 for Figure 6 Another structural diagram;

[0025] Figure 8 This is a front view of the arc-shaped claw 2 in a tubing delivery device for well workover sites according to the present invention;

[0026] Figure 9 for Figure 8 Sectional view at point AA;

[0027] Figure 10 This is a schematic diagram of the structure of a fixed component in a well workover site tubing delivery device according to the present invention. Detailed Implementation

[0028] The present invention will be further described in detail below through specific embodiments:

[0029] The reference numerals in the accompanying drawings include: 1. Base; 2. Support arm; 201. Slide groove; 202. Sliding plate; 203. Lead screw one; 204. Motor one; 3. Connecting sleeve; 301. Sleeve; 302. Rotating column; 303. Motor four; 304. Gear five; 305. Gear ring one; 4. Support frame; 401. Threaded hole; 5. Clamping assembly; 501. Connecting seat one; 502. Arc-shaped claw one; 503. Clamping sleeve; 504. Ball bearing; 505. Hydraulic cylinder one; 506. Support seat one; 6. Drive assembly; 601. Connecting seat two; 602. Arc-shaped claw two; 603. Arc-shaped groove; 604. Arc-shaped plate; 605. Cylindrical roller; 606. Hydraulic cylinder two; 60 7. Wedge block; 608. Wedge groove; 609. Tension spring; 610. Push rod; 611. Motor 5; 612. Gear ring 2; 613. Gear 6; 614. Support base 2; 615. Limiting groove; 616. Fixing plate; 617. Telescopic rod; 618. Compression spring; 7. Fixing assembly; 701. Connecting seat 3; 702. Arc claw 3; 703. Hydraulic cylinder 3; 704. Support base 3; 801. Slide rail; 802. Base; 803. Rotating shaft; 804. Roller; 805. Gear 1; 806. Gear 2; 807. Chain; 808. Gear 3; 809. Motor 2; 810. Gear 4; 811. Fixing rod; 812. Lead screw 2; 813. Motor 3.

[0030] like Figures 1 to 10The following describes a tubing delivery device for well workover operations: A base 1, a support arm 2, a connecting sleeve 3, a clamping assembly 5, a driving assembly 6, and a fixing assembly 7. The base 1 has a sliding assembly for the support arm 2 to slide along its surface. The sliding assembly includes a slide rail 801 slidably connected to the base 1. Two lead screws 812 are rotatably connected to the base 1, and a base 802 is threadedly connected to the lead screws 812. Two motors 813 are fixedly connected to one side of the base 1, and one end of the lead screw 812 extending outside the base 1 is fixedly connected to one of the motors 813. The base 802 is fixedly connected to the bottom of the support arm 2, and the bottom of the base 802 is slidably connected to the bottom of the slide rail 801. Two rotating shafts 803 are rotatably connected to both sides of the base 802. Rollers 804 are fixedly connected to each of the bases 802 and slide rails 801. Gear 1 805 and gear 2 806 are fixedly connected to the shaft 803 on one side of the base 802. A chain 807 meshes between gear 1 805 and gear 2 806. Gear 3 808 is fixedly connected to one of the shafts 803 on the other side of the base 802. Motor 2 809 is bolted to the base 802. Gear 4 810 is fixedly connected to motor 2 809. Gear 3 808 meshes with gear 4 810. A fixing rod 811 is fixedly connected to the slide rail 801. A through hole is opened on the base 802 to slide with the fixing rod 811. The sliding direction of the slide rail 801 and the base 1 is perpendicular to the sliding direction of the base 802 and the slide rail 801.

[0031] The side wall of the support arm 2 is provided with a sliding groove 201, and a sliding plate 202 is slidably connected in the sliding groove 201. A lead screw 203 is rotatably connected in the sliding groove 201 and is threadedly connected to the sliding plate 202. A motor 204 is fixedly connected to the top of the support arm 2. One end of the lead screw 203 extending outside the support arm 2 is fixedly connected to the motor 204. A rotating assembly for rotating the connecting sleeve 3 is provided between the connecting sleeve 3 and the support arm 2. The rotating assembly includes a sleeve 301, one end of which is connected to the sliding plate 202. The moving plate 202 is fixedly connected, and the other end of the sleeve 301 is connected to the rotating column 302 by a bearing. One end of the rotating column 302 is fixedly connected to the connecting sleeve 3. The connecting sleeve 3 is provided with two motors 303, and each motor 303 is fixedly connected with a gear 304. A gear ring 305 is fixedly connected to the outer wall of the sleeve 301. Each gear 304 meshes with the gear ring 305. A support frame 4 is bolted to the connecting sleeve 3. The drive assembly 6 is located between the clamping assembly 5 and the fixing assembly 7.

[0032] The clamping assembly 5 includes a connecting seat 501, which is bolted to the support frame 4. A support seat 506 is fixedly connected to the connecting seat 501. Two arc-shaped claws 502 for clamping oil pipes are hinged to the support seat 506. Two clamping sleeves 503 are screwed to each arc-shaped claw 502. Several balls 504 are rolled between the two clamping sleeves 503. A hydraulic cylinder 505 is hinged between each arc-shaped claw 502 and the connecting seat 501.

[0033] Drive assembly 6 includes a connecting seat 2 601, which is bolted to the support frame 4. A limiting groove 615 is formed on the connecting seat 2 601, and a support seat 2 614 is slidably connected within the limiting groove 615. Fixing plates 616 are fixedly connected to both the upper and lower ends of the connecting seat 2 601. Several telescopic rods 617 are fixedly connected between each fixing plate 616 and the support seat 2 614. A compression spring 618 is sleeved on each telescopic rod 617, and both ends of the compression spring 618 are fixedly connected to the fixing plate 616 and the support seat 2 614, respectively. Two arc-shaped claws 2 60 are hinged to the support seat 2 614. 2. Each arc-shaped claw 602 has an inner side with an arc-shaped groove 603 that communicates with each other when closed. An arc-shaped plate 604 is slidably connected in each arc-shaped groove 603. The inner side of the arc-shaped plate 604 has anti-slip texture. Several cylindrical rollers 605 are slidably connected at the abutment of each arc-shaped plate 604 and the arc-shaped groove 603. Each arc-shaped claw 602 is provided with a limiting unit for limiting the arc-shaped plate 604 when the arc-shaped claw 602 opens. The limiting unit includes two wedge-shaped blocks 607. Each arc-shaped claw 602 has a wedge-shaped groove 608. The wedge-shaped blocks 607 are located in the wedge-shaped groove 608 and... Hinged to the inner wall of the wedge groove 608, each wedge groove 608 communicates with the arc groove 603. One end of each wedge block 607 extends into the arc groove 603 to restrict the sliding of the cylindrical roller 605. A tension spring 609 is fixedly connected between each wedge block 607 and the wedge groove 608. Each arc claw 602 is provided with a push rod 610 for pushing the wedge block 607 to release the restriction on the arc plate 604. The two wedge grooves 608 are not at the same level. The wedge groove 608 in one arc claw 602 is in a lower position, and the wedge groove 608 in the other arc claw 602 is at a lower position. The push rod 610 is positioned at the upper end, and is similarly positioned to facilitate insertion into the corresponding wedge-shaped groove 608. The arc-shaped claw 602 is equipped with a drive unit for driving the arc-shaped plate 604 to rotate. The drive unit includes two motors 611, each of which is fixedly connected to the two arc-shaped claws 602. A gear ring 612 is fixedly connected to each arc-shaped plate 604. A gear 613 is fixedly connected to each motor 611. The gear 613 meshes with the gear ring 612. A hydraulic cylinder 606 is hinged between each arc-shaped claw 602 and the connecting seat 601.

[0034] The fixing component 7 includes a connecting seat 3 701, which is bolted to the support frame 4. A support seat 3 704 is fixedly connected to the connecting seat 3 701. Two arc-shaped claws 3 702 for fixing and clamping the tubing in the well are hinged on the support seat 3 704. The inner side of the arc-shaped claws 3 702 is provided with anti-slip texture. A hydraulic cylinder 3 703 is hinged between each arc-shaped claw 3 702 and the connecting seat 3 701. The support frame 4 has threaded holes 401 for bolting the connecting seat 1 501, the connecting seat 2 601 and the connecting seat 3 701.

[0035] The implementation method of this embodiment is as follows: First, the base 1 of the entire device is placed stably between the wellhead and the surface pipe rack. When the oil pipe needs to be lowered, the operator starts the motor 3 813 through the control system. The motor 3 813 drives the two lead screws 2 812 to rotate, which drives the entire slide rail 801 to move along the base 1 in the Y direction, so that the support arm 2 is aligned with the oil pipe on the surface pipe rack. Then, the motor 2 809 is started. The motor 2 809 drives the gear 3 808 through the gear 4 810, which in turn drives the roller 804 to rotate, thereby driving the base 802 and the entire support arm 2 to move along the slide rail 801 in the X direction. Through the combined movement in the X and Y directions, the clamping component 5 at the end of the support frame 4 is positioned above the appropriate position of the oil pipe.

[0036] Then, the two motors 303 on the connecting sleeve 3 are started. Motors 303 drive gear 304 to rotate. Gear 304 meshes with gear ring 305 fixed on sleeve 301, thereby driving the entire connecting sleeve 3 and support frame 4 to rotate around the axis of rotating column 302 until the support frame 4 is parallel to the oil pipe, at which point motors 303 are stopped. Immediately afterwards, motor 204 is started. Motor 204 drives screw 203 to rotate, causing sliding plate 202, sleeve 301, connecting sleeve 3, and support frame 4 to descend along the slide groove 201 of support arm 2. At the same time, the two hydraulic cylinders 505 and 606 are controlled to retract, pulling the two arc-shaped claws 502 and 602 to open. When the arc-shaped claw 602 is open, the wedge block 607 inside it is held in place by tension spring 60. Under the action of 9, the plate pops out and engages with the arc-shaped groove 603, restricting the sliding of the arc-shaped plate 604 and temporarily locking it. The two arc-shaped claws 502 and 602 descend to grip the oil pipe, and then the two hydraulic cylinders 505 and 606 extend, pushing the two arc-shaped claws 502 to close, firmly gripping the oil pipe. When the arc-shaped claw 602 closes, the two push rods 610 on the two arc-shaped claws 602 enter the corresponding wedge-shaped grooves 608, pushing the wedge blocks 607 back into the wedge-shaped grooves 608, compressing the tension spring 609, thereby releasing the restriction on the sliding of the arc-shaped plate 604. Simultaneously, the ball bearings 504 inside the arc-shaped claw 502, while gripping the oil pipe, allow relative rolling between the oil pipe and the arc-shaped claw 502 during subsequent rotation. Then, the motor 204 reverses, lifting the gripped oil pipe to a safe height via the lead screw 203. Then, the two motors 303 on the connecting sleeve 3 are started to reverse. The motors 303 drive the gear 304 to rotate. The gear 304 meshes with the gear ring 305 fixed on the sleeve 301, thereby driving the entire connecting sleeve 3 and support frame 4 to rotate around the axis of the rotating column 302 until the oil pipe is perpendicular to the ground, at which point the motors 303 stop.

[0037] Then, the motors 809 and 813 are controlled in coordination to move the support arm 2 and the tubing along the X and Y directions, horizontally transporting the tubing from the tubing rack position to directly above the wellhead. During this stage, the fixing component 7 is in the open state and does not participate in the tubing transport.

[0038] When the tubing reaches above the wellhead, firstly, control the extension of two hydraulic cylinders 703 to close the two arc-shaped claws 702, tightly gripping the upper tubing already installed at the wellhead. Then, control motor 204 to slowly lower the tubing. When the lower end (external thread end) of the tubing abuts against the upper end (internal thread end) of the tubing at the wellhead, the descent stops. Then, start two motors 611. Motors 611 drive the gear ring 612 on the arc-shaped plate 604 through gear 613, causing the two arc-shaped plates 604 to rotate. The arc-shaped plates 604 roll and rotate through the cylindrical rollers 605 and the arc-shaped grooves 603. The rotating arc-shaped plates 604... The drive tubing is screwed into the upper end of the wellhead tubing. After the tubing has rotated a fixed number of turns, the upper tubing is threaded into the wellhead tubing, and the arc plate 604 returns to its initial position. Then, hydraulic cylinder 606 is controlled to retract, causing arc claw 602 to open. During this opening, push rod 610 is pulled out of wedge groove 608, and wedge block 607 is ejected again under the action of tension spring 609, limiting arc plate 604. Next, hydraulic cylinders 505 and 703 are controlled to retract, causing arc claw 502 and 702 to open, releasing the tubing from its fixation. Then, the hydraulic press at the top presses down the tubing, completing the tubing lowering process. Finally, motors 809 and 813 move support arm 2 back to the surface tubing rack position, preparing to grab the next tubing, and repeating the above process. The tubing uppering and lowering processes are reverse operations.

[0039] During the threading process, the new oil pipe will experience a downward axial displacement. The downward force of the oil pipe is transmitted through the arc-shaped plate 604 and the second support seat 614, overcoming the resistance of the compression spring 618. This allows the second support seat 614 to slide slightly downward within the limiting groove 615 of the second connecting seat 601, thereby compressing the telescopic rod 617. This process compensates for the axial travel required for threading, preventing rigid interference between the device structure and the oil pipe movement. Simultaneously, the ball bearing 504 also allows for a slight axial slippage of the oil pipe.

[0040] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A tubing delivery device for well workover sites, characterized in that, The system includes a base (1), a support arm (2), a connecting sleeve (3), a clamping assembly (5), and a driving assembly (6). The base (1) has a sliding assembly for the support arm (2) to slide along the surface of the base (1). The connecting sleeve (3) and the support arm (2) are respectively provided with a rotating assembly and a lifting assembly for rotating and lifting the connecting sleeve (3). The connecting sleeve (3) has a support frame (4). The clamping assembly (5) includes a connecting seat (501). The connecting seat (501) and the support arm (2) are connected by a supporting frame (4). The support frame (4) is detachably connected. A support base (506) is fixedly connected to the connecting base (501). Two arc-shaped claws (502) for clamping oil pipes are hinged on the support base (506). Two clamping sleeves (503) are screwed onto each arc-shaped claw (502). Several balls (504) are rolled between the two clamping sleeves (503). A hydraulic cylinder (505) is hinged between each arc-shaped claw (502) and the connecting base (501). The drive... Component (6) includes a connecting seat two (601), which is detachably connected to the support frame (4). A support seat two (614) is detachably connected to the connecting seat two (601). Two arc-shaped claws two (602) are hinged to the support seat two (614). Each arc-shaped claw two (602) has an arc-shaped groove (603) on its inner side that is interconnected when closed. An arc-shaped plate (604) is slidably connected in each arc-shaped groove (603). Each arc-shaped plate (604) is connected to the arc-shaped groove. (603) has several cylindrical rollers (605) rollingly connected to the abutment. Each of the arc-shaped claws (602) is provided with a limiting unit for limiting the arc plate (604) when the arc-shaped claws (602) open. The arc-shaped claws (602) is provided with a driving unit for driving the arc plate (604) to rotate. Each of the arc-shaped claws (602) and the connecting seat (601) is hinged with a hydraulic cylinder (606). The support frame (4) is provided with a fixing component (7) for fixing and clamping the oil pipe in the well.

2. The oil tubing delivery device for well workover sites according to claim 1, characterized in that, The fixing component (7) includes a connecting seat three (701), which is detachably connected to the support frame (4). A support seat three (704) is fixedly connected to the connecting seat three (701). Two arc-shaped claws three (702) are hinged on the support seat three (704). A hydraulic cylinder three (703) is hinged between each arc-shaped claw three (702) and the connecting seat three (701).

3. The oil tubing delivery device for well workover sites according to claim 1, characterized in that, The rotating assembly includes a sleeve (301), one end of which is provided with a sliding plate (202), the sliding plate (202) being detachably connected to the support arm (2), the other end of which is connected to a rotating column (302) by a bearing, one end of which is connected to a connecting sleeve (3), the connecting sleeve (3) being provided with two motors (303), each of which is provided with a gear (304), the outer wall of the sleeve (301) being provided with a gear ring (305), and each of the gears (304) meshing with the gear ring (305).

4. The oil tubing delivery device for well workover sites according to claim 3, characterized in that, The lifting assembly includes a motor (204), a slide groove (201) on the support arm (2), a sliding plate (202) slidably connected to the slide groove (201), a lead screw (203) rotatably connected in the slide groove (201), the lead screw (203) threadedly connected to the sliding plate (202), the motor (204) fixedly connected to the top of the support arm (2), and one end of the lead screw (203) extending outside the support arm (2) fixedly connected to the motor (204).

5. The oil tubing delivery device for well workover sites according to claim 1, characterized in that, The sliding assembly includes a slide rail (801), which is detachably connected to the base (1). The bottom of the support arm (2) is provided with a base (802), the bottom of which is slidably connected to the slide rail (801). Two rotating shafts (803) are rotatably connected to both sides of the base (802). Each rotating shaft (803) is provided with a roller (804), and each roller (804) is tactilely connected to the slide rail (801). Gears (805) are respectively provided on the rotating shaft (803) on one side of the base (802). The base (802) has a gear 1 (805) and a gear 2 (806), and a chain (807) meshes between the gear 1 (805) and the gear 2 (806). A gear 3 (808) is provided on the shaft (803) on the other side of the base (802). A motor 2 (809) is provided on the base (802), and a gear 4 (810) is provided on the motor 2 (809). The gear 3 (808) meshes with the gear 4 (810). A fixing rod (811) is provided on the slide rail (801), and a through hole is opened on the base (802) that is slidably connected to the fixing rod (811).

6. The oil tubing delivery device for well workover sites according to claim 5, characterized in that, The slide rail (801) is slidably connected to the base (1). The sliding direction of the slide rail (801) and the base (1) is perpendicular to the sliding direction of the base (802) and the slide rail (801). Two lead screws (812) are rotatably connected on the base (1). The base (802) is threadedly connected to the lead screws (812). Two motors (813) are provided on one side of the base (1). The end of the lead screw (812) extending outside the base (1) is fixedly connected to the motors (813).

7. A tubing delivery device for well workover sites according to claim 2, characterized in that, The first connecting seat (501), the second connecting seat (601) and the third connecting seat (701) are all bolted to the support frame (4). The support frame (4) has several threaded holes (401) for bolting the first connecting seat (501), the second connecting seat (601) and the third connecting seat (701).

8. The oil tubing delivery device for well workover sites according to claim 1, characterized in that, The limiting unit includes two wedge blocks (607), each of the arc-shaped claws (602) has a wedge groove (608) inside, the wedge block (607) is located in the wedge groove (608) and is hinged to the wedge groove (608), each wedge groove (608) is connected to the arc groove (603), one end of each wedge block (607) extends into the arc groove (603) to restrict the sliding of the cylindrical roller (605), a tension spring (609) is provided between each wedge block (607) and the wedge groove (608), and each arc-shaped claw (602) is provided with a push rod (610) for pushing the wedge block (607) to release the restriction on the arc plate (604).

9. A tubing delivery device for well workover sites according to claim 1, characterized in that, The drive unit includes two motors (611), each of which is fixedly connected to two arc-shaped claws (602). Each arc-shaped plate (604) is provided with a gear ring (612), and each motor (611) is provided with a gear (613), which meshes with the gear ring (612).

10. A tubing delivery device for well workover sites according to claim 1, characterized in that, The connecting seat 2 (601) has a limiting groove (615), and the supporting seat 2 (614) is slidably connected to the limiting groove (615). The upper and lower ends of the connecting seat 2 (601) are provided with fixing plates (616). A number of telescopic rods (617) are provided between each fixing plate (616) and the supporting seat 2 (614), and a compression spring (618) is sleeved on the telescopic rod (617).

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