Anti-derailment clamp-type changing device

Abstract

The application discloses a clamping type replacement device capable of preventing following rotation, which comprises a cylinder sleeve, a mud pump positioning sleeve sleeved on the outer circumferential surface of the cylinder sleeve, and a lock ring, further comprises a cylinder sleeve clamp hoop which is connected to the outer circumferential surface of the lock ring through trapezoidal threads, a cylinder sleeve taking-out ring which is connected to the outer circumferential surface of the cylinder sleeve clamp hoop through a rotating buckle, and a crowbar which is matched with the cylinder sleeve taking-out ring and the lock ring, a hydraulic jacking mechanism which is matched with the cylinder sleeve is arranged in the inside of the cylinder sleeve taking-out ring, and the cylinder sleeve clamp hoop is connected to the outer circumferential surface of the mud pump positioning sleeve through a rotating buckle. The application greatly improves the overall operation safety and stability, and simultaneously improves the operation efficiency and operation effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oil drilling and workover equipment, in particular to a clamping type replacement device capable of preventing follow-up rotation. BACKGROUND

[0002] Generally, mud pumps are important equipment for oil drilling and workover operations, and the mud pumps can deliver mud or water and other flushing liquids into a borehole during drilling. The mud pump contains a large amount of silt, and the inner cylinder of the mud pump is easily worn under high pressure. Therefore, the cylinder liner needs to be replaced every few hundred hours. At present, the device for replacing the cylinder liner is extremely cumbersome and complicated, which leads to extremely cumbersome operation when replacing the cylinder liner. It often takes several workers a day to replace the cylinder liner.

[0003] In view of the above problems, Chinese patent CN 204700814 U discloses a new cylinder liner extraction device. The device includes a cylinder liner, a positioning sleeve and a cylinder liner clamp, which are sequentially arranged. The outer circumferential surface of the cylinder liner is provided with a first annular flange. One end of the cylinder liner clamp is provided with a second annular flange. The first annular flange is arranged between the second annular flange and the positioning sleeve. A cylinder liner pulling ring is arranged on the outer circumference of the cylinder liner. The right end of the cylinder liner pulling ring abuts against the left end of the second annular flange. Screws are arranged in the screw holes of the two clamping portions of the cylinder liner pulling ring. Nuts are screwed on the screws and are tightened on the outer circumferential surface of the cylinder liner.

[0004] Although the cylinder liner pulling ring, the cylinder liner, the positioning sleeve and the cylinder liner clamp are cooperatively arranged in the prior art, the overall structure is simplified to a certain extent. However, in the prior art, the cylinder liner is rotated by driving the cylinder liner clamp, and the sealing element at the head of the cylinder liner is easily damaged during the rotation of the cylinder liner, thereby affecting the service life of the cylinder liner and even causing leakage of the mud pump, resulting in installation hazards. The overall operation safety and stability are general. In addition, the cylinder liner is not installed in place during the installation of the cylinder liner, which needs to be repeatedly installed, thereby affecting the operation efficiency and operation effect. Moreover, the cylinder liner clamp and the outer circumferential surface of the positioning sleeve are threadedly connected, which requires a large force for disassembly and assembly and a large angle of rotation, thereby affecting the operation efficiency.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. SUMMARY

[0006] The present application aims to provide a clamping type replacement device capable of preventing follow-up rotation, so as to solve the technical problems of the existing cylinder liner replacement device in the background art, which simplifies the structure, but the follow-up rotation of the cylinder liner during the operation process, the overall operation safety and stability are still general, and the operation efficiency and operation effect are also general.

[0007] To achieve the above object, the present application adopts the following technical solutions:

[0008] The anti-following-up clamping type replacement device comprises a cylinder sleeve, a mud pump positioning sleeve sleeved on the outer circumferential surface of the cylinder sleeve and a lock ring, a cylinder sleeve clamp connected to the outer circumferential surface of the lock ring through trapezoidal threads, a cylinder sleeve extraction ring rotatably connected to the outer circumferential surface of the cylinder sleeve clamp, and a crowbar matched with the cylinder sleeve extraction ring and the lock ring.

[0009] Further, a plurality of male buckle protrusions II are uniformly distributed on the outer circumferential surface of the positioning sleeve at the upper end in the circumferential direction, a female buckle protrusion II corresponding to the male buckle protrusion II is arranged on the inner circumferential surface of the cylinder sleeve clamp at the lower end, a plurality of male buckle protrusion groups are uniformly distributed on the outer circumferential surface of the cylinder sleeve clamp at the upper end in the circumferential direction, and a female buckle protrusion group corresponding to the male buckle protrusion group is arranged on the inner circumferential surface of the cylinder sleeve extraction ring at the lower end.

[0010] Further, the hydraulic jacking mechanism comprises a hydraulic cylinder, a hydraulic connector, a pressure gauge and a pressure relief valve matched with the hydraulic cylinder, the hydraulic cylinder is threadedly connected to the inner circumferential surface of the cylinder sleeve extraction ring at the upper end, a hydraulic piston matched with the hydraulic cylinder is sealingly embedded into the inner lower end of the hydraulic cylinder, a stepped groove is formed on the outer circumferential surface of the hydraulic piston at the lower end, a first spring is installed in the stepped groove, a spring return ring matched with the first spring is arranged below the first spring, the spring return ring is bolted and fixedly connected to the hydraulic cylinder, and an inner sealing member and an outer sealing member matched with the hydraulic cylinder are respectively embedded into the inner circumferential surface of the hydraulic piston at the upper end and the outer circumferential surface of the hydraulic piston at the upper end.

[0011] Compared with the prior art, the present application has the following advantages:

[0012] 1. In the present application, the existing cylinder sleeve clamp is divided into a lock ring and a cylinder sleeve clamp two components, on the basis of the lock ring and the mud pump positioning sleeve being simultaneously sleeved on the outer periphery of the cylinder sleeve, through the trapezoidal thread connection of the outer periphery of the cylinder sleeve clamp and the lock ring, the rotational buckle connection of the outer periphery of the cylinder sleeve extraction ring and the cylinder sleeve clamp, and the rotational buckle connection of the outer periphery of the cylinder sleeve clamp and the mud pump positioning sleeve, the structure stability is improved based on the trapezoidal thread connection of the outer periphery of the cylinder sleeve clamp and the lock ring, and according to the structural characteristics of the rotational buckle connection, the cylinder sleeve clamp and the cylinder sleeve extraction ring only need to rotate a very small angle to realize disassembly and assembly, and then the replacement of the cylinder sleeve is quickly completed, which further simplifies the structure, effectively improves the operation convenience, and greatly improves the overall work efficiency, on this basis, through the cooperation of the hydraulic jacking mechanism inside the cylinder sleeve extraction ring, when the lock ring rotates under the action of the crowbar, the hydraulic jacking mechanism pre-presses the cylinder sleeve downward, effectively avoids the rotation of the cylinder sleeve, and avoids the damage of the sealing element at the head of the cylinder sleeve caused by the rotation of the cylinder sleeve, prolongs the service life of the cylinder sleeve, avoids the leakage of the mud pump, eliminates the safety hazard, greatly improves the overall work safety and stability, avoids the situation that the cylinder sleeve is not installed in place and needs to be repeatedly installed, further improves the work efficiency and work effect;

[0013] 2. The outer periphery of the cylinder sleeve clamp in the present application is uniformly distributed with a plurality of male buckle protrusions groups on the upper end, the inner periphery of the cylinder sleeve extraction ring is provided with a female buckle protrusion group corresponding to the male buckle protrusion group for clamping and cooperating, and the male buckle protrusion group comprises a plurality of coaxially spaced male buckle protrusions I, and the female buckle protrusion group comprises a plurality of coaxially spaced female buckle protrusions I, through the cooperation of the plurality of male buckle protrusion groups and the female buckle protrusion groups, a plurality of rotational buckle connection structures are formed, which effectively improves the connection and installation stability, improves the overall work safety and stability, and enables the cylinder sleeve extraction ring to be disassembled and assembled only by rotating a very small angle, greatly improving the operation convenience and effectively ensuring the work efficiency; at the same time, the outer periphery of the positioning sleeve in the present application is uniformly distributed with a plurality of male buckle protrusions II on the upper end, the inner periphery of the cylinder sleeve clamp is provided with a female buckle protrusion II corresponding to the male buckle protrusion II for clamping and cooperating, through the cooperation of the male buckle protrusion II and the female buckle protrusion, the cylinder sleeve clamp can also be disassembled and assembled only by rotating a very small angle, further ensuring the work efficiency;

[0014] 3. The stop pin in the application axially penetrates one side of one female buckle protrusion group of the cylinder liner taking-out ring, through the setting of the stop pin, the female buckle protrusion group that has been rotated to the position can be effectively avoided to excessively rotate to the next male buckle protrusion group of the cylinder liner clamp, the effect of rotation stop is played, that is, after the cylinder liner taking-out ring is rotated to the position relative to the cylinder liner clamp, the cylinder liner taking-out ring is prevented from continuing to rotate, the overall operation efficiency is effectively improved, and the overall operation safety and stability are improved, and the cooperation of the locking pin on the other side of the female buckle protrusion group further controls the rotation of the cylinder liner taking-out ring, and the rotation of the cylinder liner taking-out ring is timely given way and effectively locked, the quick disassembly of the cylinder liner taking-out ring is guaranteed, so that the operation efficiency and operation effect are further improved;

[0015] 4. The hydraulic jacking mechanism in the application comprises a hydraulic cylinder, a hydraulic piston, a first spring and a spring return ring, through the cooperation of the first spring and the spring return ring and the hydraulic piston, the smooth extension and contraction of the hydraulic piston can be guaranteed, the pre-pressing effect on the cylinder liner is further improved, so that the overall operation efficiency and operation effect are guaranteed, at the same time, through the cooperation of the pressure gauge and the pressure relief valve and the hydraulic cylinder, the hydraulic piston and the hydraulic joint, a high-pressure protection structure can be further formed, while the hydraulic piston is provided with hydraulic driving through the hydraulic joint, the operation safety of the hydraulic piston is effectively improved, so that the overall operation safety and stability are further improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a half-split schematic view of the application;

[0017] Fig. 2 It is an axonometric schematic view of the application;

[0018] Fig. 3 It is a working principle schematic view of the stop pin of the application;

[0019] Fig. 4 It is a lower view of the application;

[0020] Fig. 5 It is a lateral sectional view of the cylinder liner taking-out ring of the application;

[0021] Fig. 6 It is a sectional view of the locking pin of the application;

[0022] In the figure: 1, cylinder liner extraction ring, 2, cylinder liner, 3, crowbar, 4, locking ring, 5, cylinder liner clamp, 6, mud pump positioning sleeve, 71, male buckle protrusion I, 72, female buckle protrusion I, 8, stop pin, 9, locking pin, 91, threaded sleeve, 92, pull rod, 93, second spring, 94, pull head, 95, flange I, 101, male buckle protrusion II, 102, female buckle protrusion II, 11, cylinder liner sealing element, 12, hydraulic cylinder, 13, hydraulic piston, 14, stepped groove, 15, first spring, 16, spring return ring, 17, hydraulic connector, 18, pressure gauge, 19, pressure relief valve, 20, inner sealing element, 21, outer sealing element, 22, flange II, 23, rotary hole, 24, clearance hole, 25, trapezoidal thread, 26, thread. DETAILED DESCRIPTION

[0023] The following examples are used to further illustrate the content of the present application and do not limit the application of the present application.

[0024] Please refer to Figs. 1-6It shows a anti-following clamp type replacement device, including cylinder liner extraction ring 1 (can adopt density small, high strength aluminum aviation preparation), cylinder liner 2, mud pump positioning sleeve 6, mud pump positioning sleeve 6 is set on the outer surface of cylinder liner 2, the outer surface of cylinder liner 2 is formed with flange II 22 outward, mud pump positioning sleeve 6 is located at the lower end of flange II 22, the upper end of flange II 22 is abutted with lock ring 4 (the lock ring 4 can adopt thin design, to reduce the subsequent operation pressure), the lock ring 4 is set on the outer surface of cylinder liner 2, the outer surface of lock ring 4 is connected with cylinder liner clamp 5 (the inner surface of cylinder liner clamp 5 is formed with trapezoidal thread 25 in the middle, and the outer surface of lock ring 4 is formed with trapezoidal thread 25 in the middle), the cylinder liner clamp 5 is set on the outer surface of flange II 22, the inner surface of cylinder liner clamp 5 is uniformly distributed with four female buckle protrusions II 102 at the lower end, the outer surface of mud pump positioning sleeve 6 is provided with male buckle protrusion II 101 corresponding to female buckle protrusion II 102, cylinder liner clamp 5 and mud pump positioning sleeve 6 are connected by rotating buckle through female buckle protrusion II 102 and male buckle protrusion II 101 (only need to rotate 45 degrees to fix cylinder liner clamp 5), the inner surface of cylinder liner clamp 5 is uniformly distributed with four male buckle protrusion groups at the upper end, the male buckle protrusion group is composed of three coaxial and spaced male buckle protrusions I 71, the inner surface of cylinder liner extraction ring 1 is provided with female buckle protrusion group corresponding to male buckle protrusion group, the female buckle protrusion group is composed of three coaxial and spaced female buckle protrusions I 72, cylinder liner extraction ring 1 and cylinder liner clamp 5 are connected by multiple rotating buckles through female buckle protrusion I 72 and male buckle protrusion I 71 (the adjacent female buckle protrusion I 72 and male buckle protrusion I 71 are staggered up and down, the female buckle protrusion I 72 falls into the groove formed by two adjacent male buckle protrusions I 71 up and down), one side of the three female buckle protrusions I 72 of one group is axially penetrated by a stop pin 8, the adjacent position of the three female buckle protrusions I 72 of the group is provided with a locking pin 9, the locking pin 9 is composed of a threaded sleeve 91, a pull rod 92, a second spring 93 and a pull head 94, the threaded sleeve 91 is installed in the cylinder liner extraction ring 1, the pull rod 92 is coaxially penetrated in the threaded sleeve 91, one end of the pull rod 92 extends out of the bottom of the threaded sleeve 91, the other end of the pull rod 92 extends out of the top of the threaded sleeve 91 and is fixed with the pull head 94, the second spring 93 is set on the outer surface of the pull rod 92 and is located in the threaded sleeve 91, the outer surface of the pull rod 92 in the threaded sleeve 91 is provided with a flange I 95 abutting with the second spring 93;

[0025] Further, the inner circumferential surface upper end of the cylinder liner taking-out ring 1 is threadedly connected with a hydraulic cylinder 12 (the inner circumferential surface upper end of the cylinder liner taking-out ring 1 and the outer circumferential surface of the hydraulic cylinder 12 are respectively formed with threads 26), the upper end of the hydraulic cylinder 12 is further provided with a hydraulic connector 17, a pressure gauge 18 and a pressure relief valve 19 matched therewith, the inner lower end of the hydraulic cylinder 12 is embedded with a hydraulic piston 13 abuttingly matched with the cylinder liner 2, the inner circumferential surface upper end and the outer circumferential surface upper end of the hydraulic piston 13 are respectively internally provided with an inner sealing member 20 and an outer sealing member 21 matched with the hydraulic cylinder 12, the outer circumferential surface lower end of the hydraulic piston 13 is formed with a stepped groove 14, the stepped groove 14 is embedded with a first spring 15, the lower end of the first spring 15 is provided with a spring return ring 16 abuttingly matched therewith, and the spring return ring 16 is bolted and fixed to the lower end of the hydraulic cylinder 12;

[0026] Further, the anti-following rotation clamping type replacement device further comprises a crowbar 3, one end of the lock ring 4 located in the cylinder liner taking-out ring 1 is circumferentially provided with a rotation hole 23 matched with the crowbar 3, and the cylinder liner taking-out ring 1 is circumferentially provided with a giving hole 24 matched with the rotation hole 23 for the crowbar 3 to pass through, and the giving hole 24 is of a rectangular structure and has a weight-reducing effect.

[0027] The working principle and working process of the present application are as follows:

[0028] The working principle and working process of the present application are as follows:

[0028] The working principle and working process of the present application are as follows:

[0029] Unscrew the cylinder liner 2: first open the hydraulic source of the hydraulic connector 17, inject hydraulic pressure by the hydraulic connector 17, drive the hydraulic piston 13 downward by the hydraulic cylinder 12, at this time, the first spring 15 is in compression, then put the crowbar 3 through the cylinder liner and take out the gap hole 24 of the cylinder liner extraction ring 1, insert it into the rotating hole 23 of the lock ring 4, rotate the crowbar 3 to drive the lock ring 4 to rotate, rotate the lock ring 4 away from the cylinder liner clamp 5, then close the hydraulic source, make the hydraulic piston 13 retract upward, at this time, the first spring 15 returns to its original length, then lift the locking pin 9, rotate the cylinder liner extraction ring 1 and the cylinder liner clamp 5 in turn (in this process, the lock ring 4 is also removed), finally, remove the cylinder liner 2.

[0030] During the whole process, the cylinder liner 2 will not rotate with the lock ring 4, so as not to damage the cylinder liner seal 11 on the head of the cylinder liner (the function and structure of the normal cylinder liner head seal are well known in the art, and the connection setting is also well known, so it is not described here, and it is not shown in detail in the drawings).

Claims

1. A clamping replacement device for preventing rotation, comprising a cylinder liner, a mud pump positioning sleeve fitted onto the outer circumferential surface of the cylinder liner, and a locking ring, characterized in that, It also includes a cylinder liner clamp with a trapezoidal thread connected to the outer circumferential surface of the locking ring, a cylinder liner removal ring that is rotatably snapped to the outer circumferential surface of the cylinder liner clamp, and a pry bar that mates with the cylinder liner removal ring and the locking ring. The outer circumferential surface of the cylinder liner has an outwardly extending flange II. The locking ring and the mud pump positioning sleeve are respectively located at the upper and lower ends of the flange II. The cylinder liner clamp is fitted onto the outer circumferential surface of the flange II. The locking ring has a circumferentially extending hole at its end away from the flange II that mates with the pry bar. The cylinder liner removal ring has a circumferentially extending hole that mates with the pry bar. A hydraulic system that abuts against the cylinder liner is installed inside the cylinder liner removal ring. The clamping mechanism includes a cylinder liner clamp that is rotatably snapped onto the outer circumferential surface of the mud pump positioning sleeve. Multiple male thread protrusions are evenly distributed circumferentially on the upper end of the outer circumferential surface of the cylinder liner clamp. The lower end of the inner circumferential surface of the cylinder liner removal ring has female thread protrusions that correspond to and engage with the male thread protrusions. One of the female thread protrusions has a stop pin that engages with the corresponding male thread protrusion. The stop pin axially penetrates one side of the female thread protrusion. Adjacent to the other side of the female thread protrusion is a locking pin that engages with the corresponding male thread protrusion. The locking pin radially penetrates the cylinder liner removal ring.

2. The anti-rotation clamping replacement device according to claim 1, characterized in that, The hydraulic clamping mechanism includes a hydraulic cylinder threaded to the upper end of the inner circumferential surface of the cylinder sleeve take-off ring. The lower end of the hydraulic cylinder is sealed with a hydraulic piston that cooperates with it. The lower end of the outer circumferential surface of the hydraulic piston is formed with a stepped groove. A first spring is installed in the stepped groove. Below the first spring is a spring return ring that abuts against it. The spring return ring is bolted to the hydraulic cylinder.

3. The anti-rotation clamping replacement device according to claim 2, characterized in that, The hydraulic clamping mechanism also includes a hydraulic connector, a pressure gauge, and a pressure relief valve that cooperate with the hydraulic cylinder.

4. The anti-rotation clamping replacement device according to claim 2, characterized in that, The upper end of the inner circumferential surface and the upper end of the outer circumferential surface of the hydraulic piston are respectively fitted with an inner seal and an outer seal that cooperate with the hydraulic cylinder.

5. The anti-rotation clamping replacement device according to claim 1, characterized in that, The locking pin includes a threaded sleeve, a pull rod coaxially passing through the threaded sleeve, and a second spring sleeved on the outer circumferential surface of the pull rod. One end of the pull rod extends out of the bottom of the threaded sleeve, and the other end of the pull rod is fixed to a pull head located on the outer side of the top of the threaded sleeve. The second spring is located inside the threaded sleeve, and the outer circumferential surface of the pull rod located inside the threaded sleeve is provided with a flange I that abuts against the second spring.

6. The anti-rotation clamping replacement device according to claim 1, characterized in that, Each of the male buckle protrusion groups includes multiple male buckle protrusions I arranged coaxially at intervals, and each of the female buckle protrusion groups includes multiple female buckle protrusions I arranged coaxially at intervals. The number of female buckle protrusions I and male buckle protrusions I is the same.

7. The anti-rotation clamping replacement device according to claim 1, characterized in that, The upper end of the outer circumferential surface of the positioning sleeve has multiple male buckle protrusions II evenly distributed along the circumferential direction, and the lower end of the inner circumferential surface of the cylinder liner clamp is provided with female buckle protrusions II that correspond one-to-one with the male buckle protrusions II and engage with them.

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