CN214323218U

CN214323218U - Screw type piston drawing device

Info

Publication number: CN214323218U
Application number: CN202120193042.7U
Authority: CN
Inventors: 刘东章; 蒋金宝; 刘金岭; 李联中; 胡树国; 郝广业; 明晓峰; 王建军; 邹晓楠; 王淦勋; 李晓; 马鹏虎; 赵勇庆
Original assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Sinopec Shengli Offshore Drilling Co
Current assignee: Sinopec Oilfield Service Corp; Sinopec Shengli Petroleum Engineering Corp; Sinopec Shengli Offshore Drilling Co
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-10-01
Anticipated expiration: 2031-01-25

Abstract

The utility model belongs to the technical field of oil field well drilling auxiliary assembly, especially, relate to a screw piston drawing device. The hydraulic lifting device comprises a hydraulic jack, wherein the bottom of the hydraulic jack is connected with a movable lead screw in a transmission manner, and the other side of the movable lead screw is provided with a screw rod; the movable lead screw is also provided with a baffle plate at the position of the hydraulic jack, the baffle plate is a U-shaped baffle plate, the movable lead screw penetrates through the middle part of the baffle plate, and the width of the baffle plate is matched with the diameter of a cylinder sleeve of the slurry pump; the free end of the screw rod is movably connected with the piston pull rod, and the screw rod is matched with the connecting screw rod at the end part of the piston pull rod. The screw type piston drawing device with the structural unit has the advantages of simple structure, convenience in operation, capability of quickly drawing out the piston of the slurry pump at any position in the cylinder sleeve, high working efficiency, safety and stability, and great saving of manpower and material resources.

Description

Screw type piston drawing device

Technical Field

The utility model belongs to the technical field of oil field well drilling auxiliary assembly, especially, relate to a screw piston drawing device.

Background

During drilling, a mud pump is a common drilling aid. The slurry pump is used for injecting slurry into the underground while drilling, and has the functions of cooling a drill bit, cleaning a drilling tool, fixing a well wall, driving drilling and bringing rock debris back to the ground. The conventional slurry pump is of a piston type or a plunger type, a power machine drives a crankshaft of the pump to rotate, and the crankshaft drives the piston or the plunger to reciprocate in a pump cylinder through a crosshead. The piston of the slurry pump is replaced quite often and frequently in the maintenance process, the traditional disassembly mode adopts a crow bar prying mode, a hammer knocking mode, a manual mode, an electric disc pump mode and the like, the defects that the working mode is unsafe, the physical strength is high, personnel are easy to be injured and the like exist, personnel injury accidents also occur, and the electric disc pump is strictly forbidden under the existing safety system. The existing piston drawing device has larger overall dimension, and a piston pull rod cannot be taken out when a piston with smaller installation space is fixed at a position without support legs; when the existing tool is used for taking out, the installation position of the piston pull rod is easily damaged, the maintenance efficiency is reduced, and the continuous production is influenced.

A plunger pump hydraulic puller (for example, patent document No. CN 201921511355.1) is known, and a plunger pump valve seat hydraulic puller is proposed, which includes: the device comprises a hydraulic cylinder, a drawing head, a pump station and a safety valve, wherein a piston disc is assembled in the hydraulic cylinder in a sliding mode, a piston rod is connected onto the piston disc, and the outer end of the piston rod extends out of the hydraulic cylinder; the drawing head is connected to the outer end of the piston rod, and pawls are arranged on two sides of the drawing head; the pump station is communicated with the rodless cavity and the rod cavity of the hydraulic cylinder through a valve body and a pipeline; the safety valve is arranged in the hydraulic cylinder, the inlet of the safety valve is communicated with the rod cavity, and the outlet of the safety valve is communicated with the rodless cavity. The hydraulic drawing device can be used for drawing the valve seat by driving the piston rod through the hydraulic cylinder, the piston rod of the hydraulic cylinder is high in extending and retracting speed, the hydraulic drawing device can be operated by one person, and a large amount of manpower can be saved. However, the prior art cannot lack a fixing tool, can only be used for drawing the piston at a fixed position, cannot adapt to a complex drilling environment, and is not beneficial to the wide application of the device.

The patent number CN201520142706.1 and the patent name 'a hydraulic puller with a safety cage' describe that a hydraulic puller with a safety cage mainly comprises a cylinder body and a piston, wherein the cylinder body consists of a split oil way cylinder body and a piston cylinder body which are connected into a whole by welding; the piston is composed of a piston seat and a piston rod which are separated, and the tail part of the piston rod is connected with a connecting hole in the piston seat in an interference fit manner. This prior art has reduced the efficiency that the piston was drawn to a certain extent, but owing to use the piston rod afterbody to be connected with the connecting hole interference fit in the piston seat, need the strict adaptation of piston pull rod and instrument size, can't change the device according to current demand, the service surface is narrower, and is not suitable for the work of drawing of smaller size piston.

In the existing tool in the current drilling industry, the conventional piston drawing device cannot adapt to frequent replacement of the piston pull rod, and has a small application range and inconvenient operation for workers. Against this background, the inventors have designed and processed a screw piston drawing device.

SUMMERY OF THE UTILITY MODEL

The utility model provides a screw piston drawing device provides a dedicated instrument of drawing of slush pump piston, its simple structure, convenient operation are swift, and low cost.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a screw type piston drawing device comprises a hydraulic jack, wherein the bottom of the hydraulic jack is in transmission connection with a movable lead screw, and a screw is arranged on the other side of the movable lead screw;

the movable lead screw is also provided with a baffle plate at the position of the hydraulic jack, the baffle plate is a U-shaped baffle plate, the movable lead screw penetrates through the middle part of the baffle plate, and the width of the baffle plate is matched with the diameter of a cylinder sleeve of the slurry pump;

the free end of the screw rod is movably connected with the piston pull rod, and the screw rod is matched with the connecting screw rod at the end part of the piston pull rod.

Preferably, both sides of the baffle are respectively provided with a fixing support for enabling the screw rod and the piston pull rod to keep coaxial, the fixing support comprises a fixing cylinder and a fixing foot seat which is telescopic relative to the fixing cylinder, the fixing foot seat is of an L-shaped structure, and one side of the fixing foot seat is parallel to the baffle.

Preferably, a base plate is fixed to the top of the hydraulic jack, and a nut is arranged on the top of the base plate.

Preferably, the top of the hydraulic jack is also provided with a hand piece.

Preferably, the screw rod is detachably connected with the movable lead screw.

Preferably, the baffle threaded connection is on movable lead screw, just movable lead screw is hollow lead screw.

Preferably, the movable lead screw is in threaded fit connection with the screw rod.

Preferably, the bottom of the baffle is provided with an anti-slip layer.

The utility model discloses following beneficial effect has:

1. simple structure, convenient operation, can realize pulling out fast of the piston of slush pump in any position of cylinder liner, work efficiency is high and safe steady, has avoided the personnel to go up the ladder and has carried out the risk that slush pump sprocket dish changes and bring, has alleviateed the amount of labour simultaneously. Use the utility model discloses can extract the piston pull rod fast to the piston pull rod of renewal.

2. The device is high in portability, and the assembly can be replaced according to different piston types to be adapted, so that the time is saved, the efficiency is improved, and the field essential safety is greatly improved.

3. The hydraulic jack is used for providing power, the whole operation difficulty is low, the piston drawing operation can be completed by a single person, and manpower and material resources are greatly saved.

4. Through setting up the baffle, make things convenient for the device fixed position of drawing, adjustment installation angle through the skid resistant course that sets up on the baffle, has reduced the device and has slided and lead to drawing the risk of failure, has avoided the device to receive the damage.

Drawings

FIG. 1 is a schematic structural diagram of the device of the present invention;

fig. 2 is a schematic structural diagram of an embodiment 2 of the apparatus of the present invention;

fig. 3 is a schematic structural view of the piston assembly of the present invention;

fig. 4 is a schematic view of the working state of the present invention;

wherein: 11. the hydraulic lifting device comprises a hydraulic jack, 12, a movable screw rod, 13, a screw rod, 14, a baffle plate, 15, a base plate, 16, a nut, 17, a fixed cylinder, 18, a fixed foot seat, 21, a piston, 22, a piston pull rod, 23, a back cap, 24, a connecting screw rod, 25 and internal threads.

Detailed Description

The utility model provides a screw piston drawing device, it is right below to combine the figure and embodiment the utility model discloses further explain.

Example 1

As shown in fig. 1-3, the device comprises a hydraulic jack 11, a movable lead screw 12 is connected to the bottom of the hydraulic jack 11 in a transmission manner, and a screw 13 is arranged on the other side of the movable lead screw 12; a baffle plate 14 for fixing and supporting is arranged on one side of the hydraulic jack 11 connected with the movable lead screw 12; the baffle 14 on the device body 1 is a U-shaped baffle, the movable lead screw 12 penetrates through the middle of the baffle 14, the width of the baffle 14 is matched with the diameter of a cylinder sleeve of the slurry pump, and thus the two U-shaped arms are used for fixing the position of the device body;

the free end of the screw 13 is movably connected with the piston pull rod 22, and the screw 13 is matched with a connecting screw 24 at the end part of the piston pull rod 22.

The piston assembly comprises a piston 21, a piston pull rod 22, a back cap 23 and a connecting screw rod 24, wherein an internal thread 25 is arranged inside the connecting screw rod 24; the internal thread 25 of the connecting screw 24 is matched with the screw 13 and is connected with the screw by screw thread.

When the piston drawing work is carried out, the screw 13 is screwed into the internal thread 25 on the connecting screw 24 when the piston assembly is in the cylinder sleeve and is screwed, the hydraulic jack 11 is pressed, the lower end of the baffle plate 14 is blocked on the slurry pump body, and the piston 21 is smoothly drawn out of the cylinder sleeve under the action of the continuous extension of the jack. Correspondingly, the drawing operation can be completed by matching the hand wheel with the screw without the hydraulic jack 11.

Example 2

As shown in fig. 2, the device comprises a hydraulic jack 11, the bottom of the hydraulic jack 11 is connected with a movable lead screw 12 in a transmission way, and the other side of the movable lead screw 12 is provided with a screw 13; a baffle plate 14 for fixing and supporting is arranged on one side of the hydraulic jack 11 connected with the movable lead screw 12; the baffle 14 on the device body 1 is a U-shaped baffle, the movable lead screw 12 penetrates through the middle of the baffle 14, the width of the baffle 14 is matched with the diameter of a cylinder sleeve of the slurry pump, and thus the two U-shaped arms are used for fixing the position of the device body;

Fixing supports for enabling the screw 13 and the piston pull rod 22 to keep coaxial are respectively arranged on two sides of the baffle plate 14, each fixing support comprises a fixing cylinder 17 and a fixing foot seat 18 which stretches and retracts relative to the fixing cylinder 17, wherein the fixing foot seats 18 are of an L-shaped structure, and one side of each fixing foot seat is parallel to the baffle plate 14. The top of the hydraulic jack 11 is fixed with a backing plate 15, and the top of the backing plate 15 is provided with a screw cap 16. The top of the hydraulic jack 11 is also provided with a hand-held piece, and the normal work of the hydraulic jack is ensured through the hand-held piece. The screw 13 on the device body 1 is detachable. The movable lead screw 12 is a hollow movable lead screw. The movable lead screw 12 and the piston pull rod 22 are coaxially arranged. The movable screw 12 is in threaded fit connection with the screw 13, and the back cap 23 is in threaded fit connection with the connecting screw 24.

When the piston drawing work is carried out, the screw 13 is screwed into the internal thread 25 on the connecting screw 24 when the piston assembly is in the cylinder sleeve and is screwed, the hydraulic jack 11 is pressed, the baffle plate 13 is blocked on the slurry pump body, and the piston 21 is smoothly drawn out of the cylinder sleeve under the action of the continuous extension of the jack. Correspondingly, the drawing operation can be completed by matching the hand wheel with the screw without the hydraulic jack 11.

In addition, the movable lead screw 12 is connected with the screw 13 in a thread fit manner, and the movable lead screw 12 and the screw 13 are in a detachable design. The connecting size of the screw 13 can be adjusted according to the actual requirement of the piston pull rod 22, and the screw type piston pulling device is used for adjusting the size of the screw type piston pulling device to be matched with the piston assembly.

Example 3

When the piston is pulled out, when the piston assembly is in the cylinder sleeve, the screw 13 is screwed into the internal thread 25 on the connecting screw 24 and screwed, the hydraulic jack 11 is pressed, the lower end of the baffle plate 14 is blocked on the slurry pump body, meanwhile, the fixed cylinders 17 on two sides are fixed on the piston shell by adjusting the fixed cylinders 17, the fixed foot seats 18 are used for contacting with the outer surface of the slurry pump shell, the screw 13 on the device body 1 is always coaxial with the piston pull rod 22, and the piston 21 is pulled out from the cylinder sleeve stably under the action force of continuous extension of the jack. Correspondingly, the drawing operation can be completed by matching the hand wheel with the screw without the hydraulic jack 11.

As another preferred embodiment of the present invention, the difference from embodiment 1 lies in that the bottom of the baffle 14 is provided with an anti-slip layer, and when the device is guaranteed to perform the piston drawing operation again through the anti-slip layer, the position of the fixing device body 1 can be better so as to be connected with the piston assembly, thereby improving the drawing efficiency

Example 4

As another preferred embodiment of the present invention, the difference from embodiment 1 is that a backing plate 15 is fixed on the top of the hydraulic jack 11, and a nut 16 is provided on the top of the backing plate 15. The top of the hydraulic jack 11 is also provided with a hand-held piece, and the normal work of the hydraulic jack is ensured through the hand-held piece. The screw 13 on the device body 1 is detachable. The movable lead screw 12 is a hollow movable lead screw, and the movable lead screw 12 and the piston pull rod 22 are coaxially arranged. The movable screw 12 is in threaded fit connection with the screw 13, and the back cap 23 is in threaded fit connection with the connecting screw 24.

Example 5

Referring to fig. 1-3, the device comprises a hydraulic jack 11, the bottom of the hydraulic jack 11 is in transmission connection with a movable lead screw 12, and the other side of the movable lead screw 12 is provided with a screw 13; a baffle plate 14 for fixing and supporting is arranged on one side of the hydraulic jack 11 connected with the movable lead screw 12; the baffle 14 on the device body 1 is a U-shaped baffle, the movable lead screw 12 penetrates through the middle of the baffle 14, the width of the baffle 14 is matched with the diameter of a cylinder sleeve of the slurry pump, and thus the two U-shaped arms are used for fixing the position of the device body;

When the piston is pulled, when the piston assembly is in the cylinder sleeve, the screw 13 is screwed into the internal thread 25 on the connecting screw 24 and screwed, the hydraulic jack 11 is pressed, the lower end of the baffle plate 14 is blocked on the slurry pump body, meanwhile, the fixed cylinders 17 on two sides are fixed on the piston shell by adjusting the fixed cylinders 17, and the fixed foot seats 18 are used for being in contact with the piston shell, namely the outer surfaces on two sides of the slurry pump body, so that the screw 13 on the device body 1 is always coaxial with the piston pull rod 22, and the piston 21 is stably pulled out from the cylinder sleeve under the action force of the continuous extension of the jack. Correspondingly, the drawing operation can be completed by matching the hand wheel with the screw without the hydraulic jack 11.

As another preferred embodiment of the present invention, the difference from embodiment 1 is that a hand wheel is used to replace the hydraulic jack 11, and the pulling operation is completed by the cooperation of the hand wheel and the screw rod 13. The hydraulic jack 11 is not needed, the weight and the operation requirement of the device are further reduced, and the device is more suitable for being used under the extreme conditions in the re-drilling operation.

The utility model provides a screw piston drawing device, this screw piston drawing device specifically including hydraulic jack 11, activity lead screw 12, screw rod 13, baffle, 14, backing plate 15, nut 16, back of the body cap 23, connecting screw 24, internal thread 25. The screw type piston drawing device with the structural unit has the advantages of simple structure, convenience in operation, capability of quickly drawing out the piston 21 of the slurry pump at any position in the cylinder sleeve, high working efficiency, safety and stability, and great manpower and material resources conservation.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The screw type piston drawing device is characterized by comprising a hydraulic jack, wherein the bottom of the hydraulic jack is in transmission connection with a movable lead screw, and a screw is arranged on the other side of the movable lead screw;

2. The screw-type piston drawing device as claimed in claim 1, wherein the baffle is provided at both sides thereof with fixing brackets for keeping the screw coaxial with the piston rod, the fixing brackets comprise a fixing cylinder and a fixing foot seat which is telescopic relative to the fixing cylinder, the fixing foot seat is of an L-shaped structure, and one side of the fixing foot seat is parallel to the baffle.

3. The piston-type drawing device with screw type as claimed in claim 1, wherein a backing plate is fixed on the top of the hydraulic jack, and a nut is arranged on the top of the backing plate.

4. The piston-type drawing device as claimed in claim 1, wherein the top of the hydraulic jack is further provided with a hand piece.

5. The piston-pulling apparatus of claim 1, wherein said threaded rod is removably connected to said movable threaded rod.

6. The piston-type drawing device of claim 1, wherein the baffle is threaded onto a movable lead screw, and the movable lead screw is a hollow lead screw.

7. The piston-pulling apparatus of claim 1, wherein said movable lead screw is in threaded engagement with the threaded rod.

8. The piston-screw drawing device of claim 1, wherein the bottom of the baffle is provided with an anti-slip layer.