Tension test equipment for petroleum wellhead tool

Abstract

The invention relates to tension test equipment for a petroleum wellhead tool, and belongs to the field of tension test equipment, the tension test equipment comprises a support and a test frame, the support is provided with a clamping mechanism, and the test frame is provided with a test mechanism; the clamping mechanism comprises a left-right moving module and two cross beams, the two cross beams are arranged at intervals from left to right, the left-right moving module is used for driving the cross beams to move in the left-right direction, a front-back moving module is arranged on the cross beams, and a lifting module is arranged on a movable part of the front-back moving module; according to the invention, the clamping mechanism is used for realizing automatic disassembly and assembly during the pulling force test of the hanging ring, manual operation is avoided, the efficiency is improved, the hanging ring is supported by the two test bases during the test, the effect of automatically straightening the hanging ring is also achieved, the safety is improved, secondly, when the hanging ring is broken during the test, the broken hanging ring can be supported by the supporting unit, and the safety of the hanging ring is improved. The lifting ring is prevented from falling off from the test pile, and a mechanical claw can conveniently grab the lifting ring for disassembly.

Description

Technical Field

[0001] The invention relates to a tension test device for a petroleum wellhead tool, belonging to the field of tension test devices. Background Art

[0002] Oil wellhead tools are key equipment in oil production operations. Among them, the lifting ring, as an important part of the wellhead tools, must bear the full weight of the pipe. Therefore, the tensile test of the lifting ring is a necessary step to ensure its strength and durability.

[0003] The Chinese utility model patent with the announcement number CN221199231U discloses a tensile test device, including a frame, a pair of parallel limit plates are vertically arranged on the top surface of the frame, the limit plates are provided with several fixed points along their own length direction, and a telescopic mechanism is fixed at one end of the frame; one end of the external specimen is connected to the fixed point and the other end is fixed to the telescopic mechanism, and the telescopic mechanism applies tension to the external specimen along the length of the limit plate through telescopic movement. By setting several fixed points on the limit plate along its own length direction, and the spacing between adjacent fixed points is less than the maximum stroke of the telescopic mechanism, when testing external specimens of different lengths, the fixed points matching the length of the external specimen can be found according to the length of the external specimen, thereby greatly expanding the scope of application of the tensile test device. However, in the prior art, it is difficult to realize automation in the installation and removal of the lifting ring on the tensile test device, and it is usually manually operated, resulting in low installation and removal efficiency of the lifting ring, which is difficult to meet the needs of large-scale testing in the petroleum industry. Moreover, during the operation, the lifting ring needs to be manually straightened, which poses certain safety hazards.

[0004] Therefore, there is a need for a tension test device for oil wellhead tools to achieve automatic installation and removal of lifting rings, avoid manual operation, and improve efficiency and safety. Summary of the invention

[0005] The technical problem to be solved by the present invention is: in order to overcome the deficiencies of the prior art, a tensile test device for oil wellhead tools is provided which can realize automatic installation and removal of lifting rings, avoid manual operation, and improve efficiency and safety.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: a tension test device for oil wellhead tools, comprising a bracket and a test frame, the bracket is provided with a clamping mechanism, and the test frame is provided with a test mechanism; The clamping mechanism includes a left-right moving module and two crossbeams, the two crossbeams are arranged at intervals from left to right, the left-right moving module is used to drive the crossbeam to move in the left-right direction, the crossbeam is provided with a front-and-back moving module, the movable part of the front-and-back moving module is provided with a lifting module, the movable part of the lifting module is provided with a lifting rod, the front-and-back moving module is used to drive the lifting module to move forward and backward, the lifting module is used to drive the lifting rod to move up and down, and a manipulator is provided at the bottom of the lifting rod, and the manipulator is used to clamp the lifting ring; The testing mechanism includes an oil cylinder and two test seats, the two test seats correspond to the two crossbeams one by one, the two test seats are both located on the left side of the oil cylinder, the two test seats are both located below the manipulator, and the two test seats are both connected to the test frame in a sliding manner along the left and right directions. The oil cylinder is used to drive the test seat on the right side to move left and right, and the test seat on the left side is locked in the horizontal direction with the test frame through a locking pin; A test pile is arranged on the test seat.

[0007] Preferably, the manipulator includes a first jaw, a second jaw and a switching device, the first jaw is arranged vertically, the second jaw is arranged horizontally, the first jaw and the second jaw are both connected to the switching device, and the switching device is used to drive the first jaw and the second jaw to exchange positions.

[0008] Preferably, the test frame is provided with a plurality of pin holes, which are arranged at intervals from left to right, and the locking pin is inserted into the test frame on the right side, and the locking pin is inserted into one of the pin holes.

[0009] Preferably, a support unit is provided on the test seat, and the support unit is used to support the hanging ring.

[0010] Preferably, the support unit includes a support rod, a fixed block and a locking rod, one end of the support rod is rotatably connected to the test seat, the other end of the test seat is provided with a support wheel, the support rod is provided with a slide groove, a connecting rod is passed through the slide groove, the connecting rod and the slide groove are slidably connected along the left and right directions, the fixed block is fixedly set on the test seat, the locking rod vertically passes through the fixed block, the locking rod is fixedly connected to the connecting rod, and the locking rod is locked to the fixed block by a locking screw.

[0011] Preferably, it also includes an operating table, in which a data collection module, a pressure compensation system, a safety protection system and a gripper control system are arranged.

[0012] Preferably, the oil cylinder is connected to a hydraulic power stabilization system.

[0013] Preferably, the two test seats are connected to the test frame by rollers for sliding along the left-right direction.

[0014] Preferably, a slot is provided on the test socket, and the test pile is plugged into and matched with the slot.

[0015] Preferably, the test frame includes two guide rails and multiple bases, the multiple bases are arranged at intervals from left to right, the two guide rails are distributed front and back, the guide rails are parallel to the left and right directions, the guide rails are fixed on the bases, the pin holes are set on the guide rails, and the test seat is slidably connected to the guide rails.

[0016] Compared with the prior art, the advantages of the present invention are: The present invention discloses a tension testing device for oil wellhead tools. The clamping mechanism is used to realize automatic disassembly and assembly of a lifting ring during tension testing, thereby avoiding manual operation and improving efficiency. During testing, the lifting ring is supported by two test seats, which also has the effect of automatically straightening the lifting ring, thereby improving safety. Secondly, when the lifting ring is broken during testing, the support unit can also support the broken lifting ring to prevent the lifting ring from falling off the test pile, making it easier for a mechanical claw to grab the lifting ring for disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a tensile testing device for oil wellhead tools according to the present invention; Figure 2 It is a front view of a tensile testing device for oil wellhead tools of the present invention; Figure 3 A top view of a tensile testing device for oil wellhead tools according to the present invention; Figure 4 It is a left side view of a tensile testing device for oil wellhead tools of the present invention; Figure 5 is a structural schematic diagram of the clamping mechanism; Figure 6 It is the structural diagram of the robot; Figure 7 It is the structural diagram of the test organization; Figure 8 for Figure 7 A magnified view of part A; Fig. 9 It is a schematic diagram of the connection structure between the lifting ring and two test sockets; Fig.10 It is a schematic diagram of the connection structure between the support unit and the left test socket; Fig.11 It is the structural diagram of the test socket on the right side; Fig.12 It is the structural diagram of the test pile; Fig.13 is a structural schematic diagram of a support unit; Fig.14 It is a schematic diagram of the structure of the lifting ring.

[0018] in: Bracket 1, test frame 2, clamping mechanism 3, test mechanism 4, operating table 5, lifting ring 6; Guide rail 21, base 22; Left and right moving module 31, crossbeam 32, front and rear moving module 33, lifting module 34, lifting rod 35, manipulator 36; A first clamping jaw 361, a second clamping jaw 362, and a switching device 363; Oil cylinder 41, test seat 42, roller 43, pin hole 44, slot 45, test pile 46, support unit 47, locking pin 48; Support rod 471, fixing block 472, locking rod 473, support wheel 474, slide slot 475, connecting rod 476, locking screw 477; Rod body portion 61 and ring body portion 62. DETAILED DESCRIPTION

[0019] like Figure 1-14 As shown, a tension test device for oil wellhead tools in this embodiment includes a bracket 1 and a test frame 2, wherein the bracket 1 is provided with a clamping mechanism 3, and the test frame 2 is provided with a test mechanism 4, wherein the clamping mechanism 3 is used to clamp a lifting ring 6 and drive the lifting ring 6 to move to the test mechanism, and the test mechanism 4 is used to implement a tension test on the lifting ring 6; The clamping mechanism 3 includes a left-right moving module 31 and two crossbeams 32, the two crossbeams 32 are arranged at intervals from left to right, the left-right moving module 31 is used to drive the crossbeam 32 to move in the left-right direction, the crossbeam 32 is provided with a front-and-back moving module 33, the movable part of the front-and-back moving module 33 is provided with a lifting module 34, the movable part of the lifting module 34 is provided with a lifting rod 35, the front-and-back moving module 33 is used to drive the lifting module 34 to move forward and backward, the lifting module 34 is used to drive the lifting rod 35 to move up and down, and the bottom of the lifting rod 35 is provided with a manipulator 36, and the manipulator 36 is used to clamp the lifting ring 6; The manipulator 36 includes a first clamp 361, a second clamp 362 and a switching device 363. The first clamp 361 is arranged vertically, and the second clamp 362 is arranged horizontally. The first clamp 361 and the second clamp 362 are both connected to the switching device 363. The switching device 363 is used to drive the first clamp 361 and the second clamp 362 to exchange positions. The first clamp 361 and the second clamp 362 are used to clamp the lifting rings 6 of different sizes. The test mechanism includes an oil cylinder 41 and two test seats 42. The two test seats 42 correspond to the two crossbeams 32 one by one. The two test seats 42 are both located on the left side of the oil cylinder 41. The two test seats 42 are both located below the manipulator 36. The two test seats 42 are slidably connected to the test frame 2 along the left and right directions through rollers 43. The oil cylinder 41 is used to drive the test seat 42 on the right to move left and right. The test seat 42 on the left is locked horizontally with the test frame 2 through a locking pin 48. A plurality of pin holes 44 are provided on the test frame 2. The plurality of pin holes 44 are arranged at intervals from left to right. The locking pin 48 is inserted into the test frame 2 on the right, and the locking pin 48 is inserted into one of the pin holes 44. The test socket 42 is provided with a slot 45, and a test post 46 is inserted into the slot 45; The test seat 42 is provided with a support unit 47, and the support unit 47 is used to support the lifting ring 6; The support unit 47 includes a support rod 471, a fixed block 472 and a locking rod 473. One end of the support rod 471 is rotatably connected to the test seat 42. The other end of the test seat 42 is provided with a support wheel 474. The support rod 471 is provided with a slide groove 475. A connecting rod 476 is inserted into the slide groove 475. The connecting rod 476 is slidably connected to the slide groove 475 along the left and right directions. The fixed block 472 is fixedly provided on the test seat 42. The locking rod 473 vertically passes through the fixed block 472. The locking rod 473 is fixedly connected to the connecting rod 476. The locking rod 473 is locked with the fixed block 472 by a locking screw 477. It also includes an operating table 5, in which a data collection module, a pressure compensation system, a safety protection system and a gripper control system are arranged; The oil cylinder 41 is connected to a hydraulic power stabilization system; The test stand 2 includes two guide rails 21 and a plurality of bases 22, the plurality of bases 22 are arranged at intervals from left to right, the two guide rails 21 are distributed front to back, the guide rails 21 are parallel to the left and right directions, the guide rails 21 are fixedly arranged on the bases 22, the pin holes 44 are arranged on the guide rails 21, and the test seats 42 are slidably connected to the guide rails 21; During the test, a plurality of lifting rings 6 are placed side by side at the belt test position, wherein the lifting ring 6 is composed of a rod body portion 61 and a ring body portion 62 located at both ends of the rod body portion 61. During the placement of the lifting ring 6, the rod body portion 61 is parallel to the left and right direction; The two lifting rods 35 are respectively moved to the top of one of the side suspension rods by the left-right moving module 31 and the front-back moving module 33. Then, the lifting rod 35 is driven down by the lifting module 34, so that the first clamping claw 361 or the second clamping claw 362 is moved to the rod body 61 of the suspension ring 6. In addition, the specific clamping claw selects one of the first clamping claw 361 and the second clamping claw 362 according to the diameter of the rod body 61. Then, the first clamping claw 361 or the second clamping claw 362 clamps the rod body 61 and moves, so that the suspension ring 6 The two ring bodies 62 are respectively moved to the two test seats 42, and the two test piles 46 are respectively inserted into the two ring bodies 62, that is, the two test piles 46 respectively hook the two ring bodies 62 of the lifting ring 6, and at the same time play the effect of straightening the lifting ring 6, and the two support wheels 474 are against the bottom of the rod body 61 to support the lifting ring 6, and then the first clamping jaw 361 or the second clamping jaw 362 is released and moved upward, so that the first clamping jaw 361 or the second clamping jaw 362 is separated from the lifting ring 6, that is, the installation of the lifting ring 6 to be tested is completed; Next, the test seat 42 on the left side is driven to move to the left by the oil cylinder 41. Since the two test piles 46 respectively hook the two ring bodies 62 of the lifting ring 6, the lifting ring 6 is subjected to tension. In fact, the oil cylinder 41 is connected with a plurality of pressure sensors and position sensors for real-time monitoring of the stress of the lifting ring 6 during the test to ensure the accuracy and stability of the test. The test pile 46 can be replaced to meet the requirements of the test of various specifications of the lifting ring 6. The length of the lifting ring 6 can be met by moving the test seat 42. When the test seat 42 is moved, the locking pin 48 is inserted into the pin hole 44 at the corresponding position. Hydraulic power stabilization system: provides a stable and reliable hydraulic source for the oil cylinder 41 to prevent hydraulic fluctuations from affecting the accuracy of the test; Data acquisition module: It can collect the tension data of the whole process in real time, and display the tension change curve through the computer system. The test results can automatically generate a report, including recording the tension curve, test time, test load, and judging whether it is qualified and other important parameters. At the same time, according to the acquisition displacement sensor, the oil cylinder 41 has a return function, and the positions of the front and rear of the test ring 6 must be consistent to meet the installation and removal of the first clamping jaw 361 or the second clamping jaw 362; Pressure compensation system: The tensile test must be in a constant pressure state. Hydraulic fluctuations will greatly affect its stability, so it is necessary to design a pressure compensation system to control the power source pressure to be constant.

[0020] Safety protection system: With overload protection function, during the test, if the tension of a certain lifting ring 6 exceeds the preset safety value, the system will automatically stop the test and alarm to ensure the safety of the equipment and operators. At the same time, there is a manual emergency stop button to prevent special situations.

[0021] Gripper control system: by manually setting the specifications and models of the elevators, presetting the distance between the two manipulators 36 and the specifications of the manipulators 36 used, manual lifting can be performed for the first time, and the automatic installation and removal of the lifting ring 6 can be completed later through the system memory function or sensor recognition; After the test is completed, the lifting ring 6 to be tested is removed from the two test seats 42 in the opposite manner to the installation steps of the lifting ring 6 to be tested, that is, the lifting ring 6 is disassembled. After the disassembly is completed, the tension test of the next lifting ring 6 to be tested is performed; In addition, when the hanging ring 6 to be tested is broken during the tension test, the broken rod body 61 is supported by the support wheel 474 to prevent the ring body 62 from falling off the test pile 46, so that the manipulator 36 can grab the tested hanging ring 6. When the diameter of the rod body 61 changes, that is, when the tension test is performed on hanging rings 6 of different specifications, the locking screw 477 is loosened to make the locking rod 473 rise and fall on the fixing block 472, and drive the connecting rod 476 to move left or right in the slide groove 475, and at the same time push the support rod 471 to rotate around the connection point between the support rod 471 and the test seat 42, so that the support wheel 474 adjusts its position upward or downward according to the diameter of the rod body 61. After the position adjustment of the support wheel 474 is completed, the locking screw 477 is tightened. In summary, the clamping mechanism 3 is used to realize automatic disassembly and assembly of the lifting ring 6 during the tension test, thus avoiding manual operation and improving efficiency. During the test, the support of the lifting ring 6 by the two test seats 42 also has the effect of automatically straightening the lifting ring 6, thereby improving safety. Secondly, when the lifting ring 6 breaks during the test, the support unit 47 can also support the broken lifting ring 6 to prevent the lifting ring 6 from falling off the test pile 46, making it easier for the mechanical claw to grab the lifting ring 6 for disassembly.

[0022] In addition to the above embodiments, the present invention also includes other implementation modes. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.

Claims

1. A tension test device for oil wellhead tools, comprising a bracket (1) and a test frame (2), characterized in that: The bracket (1) is provided with a clamping mechanism (3), and the test frame (2) is provided with a testing mechanism (4); The clamping mechanism (3) comprises a left-right movable module (31) and two cross beams (32), the two cross beams (32) being arranged at intervals from left to right, the left-right movable module (31) being used to drive the cross beam (32) to move in the left-right direction, the cross beam (32) being provided with a front-and-back movable module (33), the movable portion of the front-and-back movable module (33) being provided with a lifting module (34), the movable portion of the lifting module (34) being provided with a lifting rod (35), the front-and-back movable module (33) being used to drive the lifting module (34) to move forward and backward, the lifting module (34) being used to drive the lifting rod (35) to move upward and downward, a manipulator (36) being provided at the bottom of the lifting rod (35), the manipulator (36) being used to clamp the lifting ring (6); The testing mechanism comprises an oil cylinder (41) and two test seats (42), the two test seats (42) corresponding to the two cross beams (32) one by one, the two test seats (42) being located on the left side of the oil cylinder (41), the two test seats (42) being located below the manipulator (36), the two test seats (42) being connected to the test frame (2) in a sliding manner in the left-right direction, the oil cylinder (41) being used to drive the right test seat (42) to move left-right, and the left test seat (42) being locked in the horizontal direction with the test frame (2) via a locking pin (48); A test pile (46) is arranged on the test seat (42).

2. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: The manipulator (36) comprises a first clamp (361), a second clamp (362) and a switching device (363); the first clamp (361) is arranged vertically, the second clamp (362) is arranged horizontally, the first clamp (361) and the second clamp (362) are both connected to the switching device (363), and the switching device (363) is used to drive the first clamp (361) and the second clamp (362) to exchange positions.

3. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: The test frame (2) is provided with a plurality of pin holes (44), the plurality of pin holes (44) being arranged at intervals from left to right, the locking pin (48) being inserted into the test frame (2) on the right side, and the locking pin (48) being inserted into one of the pin holes (44).

4. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: A support unit (47) is provided on the test seat (42), and the support unit (47) is used to support the lifting ring (6).

5. A tensile testing device for oil wellhead tools according to claim 4, characterized in that: The support unit (47) comprises a support rod (471), a fixed block (472) and a locking rod (473); one end of the support rod (471) is rotatably connected to the test seat (42); the other end of the test seat (42) is provided with a support wheel (474); a slide groove (475) is provided on the support rod (471); a connecting rod (476) is passed through the slide groove (475); the connecting rod (476) and the slide groove (475) are slidably connected in the left-right direction; the fixed block (472) is fixedly provided on the test seat (42); the locking rod (473) vertically passes through the fixed block (472); the locking rod (473) is fixedly connected to the connecting rod (476); the locking rod (473) is locked with the fixed block (472) by a locking screw (477).

6. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: It also comprises an operating table (5), wherein the operating table (5) is provided with a data collection module, a pressure compensation system, a safety protection system and a gripper control system.

7. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: The oil cylinder (41) is connected to a hydraulic power stabilization system.

8. The tensile testing device for oil wellhead tools according to claim 1, characterized in that: The two test seats (42) are both slidably connected to the test frame (2) along the left-right direction via rollers (43).

9. A tensile testing device for oil wellhead tools according to claim 1, characterized in that: The test socket (42) is provided with a slot (45), and the test post (46) is plugged into and matched with the slot (45).

10. The tensile testing device for oil wellhead tools according to claim 1, characterized in that: The test stand (2) comprises two guide rails (21) and a plurality of bases (22), the plurality of bases (22) being arranged at intervals from left to right, the two guide rails (21) being distributed front to back, the guide rails (21) being parallel to the left-right direction, the guide rails (21) being fixedly arranged on the bases (22), the pin holes (44) being arranged on the guide rails (21), and the test seats (42) being slidably connected to the guide rails (21).

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