Self-adaptive anti-blocking protection device for oil well pipe column

Abstract

The utility model relates to the technical field of oil exploitation equipment, in particular to a self-adaptive anti-blocking protection device for an oil well pipe column, which comprises a sleeve and an oil pumping pipe, and is characterized in that an oil pushing rod is arranged above the inside of the sleeve, a first extension rod is in threaded connection with the bottom of the oil pushing rod, and the bottom of the first extension rod is fixedly connected with two connecting blocks; the second extension rod is in threaded connection with the top of the oil pumping pipe, two connecting blocks are fixedly connected to the top of the second extension rod, the connecting sleeve is arranged between the first extension rod and the second extension rod, two connecting blocks are fixedly connected to the top and the bottom of the connecting sleeve, and the two rotating ball heads are arranged among the four corresponding connecting blocks respectively. The utility model has the beneficial effects that through the rotating ball head between the first extension rod and the second extension rod, self-adaptive adjustment can be realized when linear motion is not carried out in the oil pumping process, automatic adjustment can be realized according to the actual underground working condition, the irregular shape and resistance change of a sleeve can be effectively adapted, the friction between an oil pumping pipe and the wall of the sleeve can be reduced, and the oil pumping efficiency can be improved. And the clamping stagnation risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, and in particular to an adaptive anti-jamming protection device for oil well tubing. Background Technology

[0002] In the process of oil extraction, well tubing is an important piece of equipment, undertaking key tasks such as oil and gas transportation and downhole operations.

[0003] However, the downhole environment of oil wells is complex. When the sucker pipe moves up and down inside the casing for oil pumping operations, if the sucker pipe does not move in a straight line, it can cause the sucker pipe to get stuck with the casing. This situation can easily lead to the tubing string getting stuck during tripping operations or normal production. On the one hand, the friction between the sucker pipe and the casing will increase, which may lead to wear, deformation or even breakage of the sucker pipe or casing, thereby damaging the equipment. On the other hand, the stuck sucker pipe will hinder normal oil pumping operations, leading to a decrease in production efficiency, or even a complete halt to production, affecting the oilfield's output.

[0004] To address the above issues, we have developed an adaptive anti-sticking protection device for oil well tubing. Utility Model Content

[0005] This utility model discloses an adaptive anti-jamming protection device for oil well tubing, which aims to solve the technical problems in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adaptive anti-sticking protection device for oil well tubing includes a casing and a sucker pipe. The casing has symmetrically spaced oil inlet holes at equal intervals at its lower interior. The sucker pipe is slidably connected inside the casing. The device further includes: a push rod disposed above the casing; a first extension rod threaded to the bottom of the push rod, with two connecting blocks fixedly connected to its bottom; a second extension rod threaded to the top of the sucker pipe, with two connecting blocks fixedly connected to its top; a connecting sleeve disposed between the first and second extension rods, with two connecting blocks fixedly connected to both its top and bottom; and two rotating ball heads disposed between four corresponding connecting blocks.

[0008] In oilfield extraction operations, crude oil enters through the inlet hole of the casing. When the push rod is pressed down, the first extension rod, connecting sleeve and second extension rod drive the sucker pipe to move down. Rotating the ball head allows the various components to flexibly adjust their angles during movement, preventing the tubing from getting stuck and ensuring smooth oil extraction.

[0009] In a preferred scheme, two oil buffering grooves are formed in the inside of the oil extraction pipe, oil extraction holes are formed between the bottom of the oil extraction pipe and the two oil buffering grooves, and a packer ball is arranged in each of the oil buffering grooves and matched with the oil extraction hole.

[0010] When the oil extraction pipe is lowered to extract oil, the crude oil enters the oil buffering groove through the oil extraction hole, the packer ball blocks the oil extraction hole to prevent the backflow of the crude oil, and the crude oil is discharged from the top oil outlet hole, thereby ensuring the oil extraction efficiency and avoiding the pipe column from being stuck due to backflow.

[0011] In a preferred scheme, a communication groove is formed in the inside of the oil extraction pipe, lubrication holes are formed on the outside of the oil extraction pipe at equal intervals, the lubrication holes are communicated with the communication groove, a connecting pipe is fixedly connected to the top of the oil extraction pipe, the bottom of the connecting pipe extends into the communication groove, and the top of the connecting pipe is connected with external lubricating oil equipment.

[0012] In long-term operation of the oil well, the external lubricating oil equipment delivers lubricating oil to the communication groove through the connecting pipe, the lubricating oil seeps out of the lubrication holes and is applied to the contact surface of the oil extraction pipe and the casing, thereby reducing the friction resistance and preventing the pipe column from being stuck due to excessive friction.

[0013] In a preferred scheme, a rotatable connecting support is connected to the top of the oil pushing rod through four fastening screws.

[0014] When the oil pushing rod is installed, the rotatable connecting support is fixed to the wellhead equipment through the four fastening screws, the connecting support can be flexibly rotated during operation to adapt to oil pushing operations at different angles, while ensuring that the oil pushing rod is stably connected and avoiding operation failure of the pipe column due to angle problems.

[0015] In a preferred scheme, the oil pushing rod, the first extension rod, the second extension rod, the connecting sleeve and the rotating ball head are all hollow structures to facilitate the penetration of the connecting pipe.

[0016] To realize long-distance delivery of lubricating oil, the connecting pipe penetrates the hollow structures of the oil pushing rod, the first extension rod, the second extension rod, the connecting sleeve and the rotating ball head, thereby smoothly delivering the lubricating oil to the communication groove of the oil extraction pipe, simplifying the pipeline layout and ensuring stable operation of the lubricating system.

[0017] In a preferred scheme, the first extension rod and the second extension rod automatically adjust the angle according to the shape of the casing and the size of the resistance under the action of the supporting member.

[0018] When the casing of the oil well is locally deformed or the resistance is uneven, the first extension rod and the second extension rod automatically adjust the angle under the action of the supporting member, thereby preventing the pipe column from being stuck and ensuring normal oil well production.

[0019] The oil well pipe column self-adapting anti-blocking protection device has the following advantages:

[0020] In the utility model,

[0021] 1、 through the rotating ball head between the first extension rod and the second extension rod, can make in the oil pumping process not in the straight line movement can be self -adaptation adjustment, according to the actual working condition of downhole automatic adjustment, effectively adapt to the irregular shape and resistance change of casing, reduce the friction of oil pumping pipe and casing wall, reduce the risk of blocking;

[0022] 2、 through the connecting pipe from the outside lubricating oil is sent into the communication groove in the oil pumping pipe, then according to the downhole pressure adjustment lubricating liquid output through the lubricating hole, continuously form lubricating film between oil pumping pipe and casing wall, keep good lubricating effect, further prevent oil pumping pipe blocking, compared with the traditional device greatly improves the operation quality and use efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a kind of oil well pipe column self-adapting anti-blocking protection device's three-dimensional structure schematic diagram proposed in the utility model.

[0024] Figure 2 It is a kind of oil well pipe column self-adapting anti-blocking protection device's casing section view schematic diagram proposed in the utility model.

[0025] Figure 3 It is a kind of oil well pipe column self-adapting anti-blocking protection device's oil pumping pipe section view schematic diagram proposed in the utility model.

[0026] Figure 4 It is a kind of oil well pipe column self-adapting anti-blocking protection device's local structure explosion schematic diagram proposed in the utility model.

[0027] Figure 5 It is a kind of oil well pipe column self-adapting anti-blocking protection device's rotating ball head structure schematic diagram proposed in the utility model.

[0028] Figure 6 It is Figure 3 Enlarged view in A.

[0029] In the drawing, 1, casing;2, oil pumping pipe;3, push oil rod;4, first extension rod;5, second extension rod;6, connecting sleeve;7, connecting block;8, rotating ball head;9, oil inlet hole;10, oil buffer groove;11, oil pumping hole;12, packer;13, communication groove;14, lubricating hole;15, connecting pipe;16, rotatable connecting support;17, oil outlet hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0031] The oil well pipe column self-adaptive anti-blocking protection device disclosed by the utility model is mainly applied to the scene of oil exploitation equipment.

[0032] Referring to Figures 1-6 An oil well pipe column self-adaptive anti-blocking protection device, comprising a sleeve pipe 1 and a pumping pipe 2, characterized in that oil inlet holes 9 are symmetrically and equidistantly arranged at the lower part of the inside of the sleeve pipe 1, the pumping pipe 2 is slidingly connected to the inside of the sleeve pipe 1, and further comprising a push oil rod 3, the push oil rod 3 being arranged at the upper part of the inside of the sleeve pipe 1, a first extension rod 4, the first extension rod 4 being threadedly connected to the bottom of the push oil rod 3 and being fixedly connected with two connecting blocks 7 at the bottom, a second extension rod 5, the second extension rod 5 being threadedly connected to the top of the pumping pipe 2 and being fixedly connected with two connecting blocks 7 at the top, a connecting sleeve 6, the connecting sleeve 6 being arranged between the first extension rod 4 and the second extension rod 5 and being fixedly connected with two connecting blocks 7 at the top and the bottom, and two rotating ball heads 8, the two rotating ball heads 8 being arranged between the corresponding four connecting blocks 7 respectively.

[0033] In the oil field exploitation operation, crude oil enters the oil inlet holes 9 of the sleeve pipe 1, when the push oil rod 3 is pressed down, the pumping pipe 2 is driven to move down by the first extension rod 4, the connecting sleeve 6 and the second extension rod 5, the rotating ball heads 8 make the components flexibly adjust the angle in the movement, the pipe column is prevented from being stuck, and the pumping is ensured to be smooth.

[0034] In a preferred embodiment, two oil buffering grooves 10 are arranged in the inside of the pumping pipe 2, oil pumping holes 11 are arranged between the bottom of the pumping pipe 2 and the two oil buffering grooves 10, and a packer 12 is arranged in the inside of each oil buffering groove 10 and matched with the oil pumping hole 11, and an oil outlet hole 17 is symmetrically arranged at the top of the pumping pipe 2.

[0035] In the embodiment, when the pumping pipe 2 moves down to pump oil, crude oil enters the oil buffering groove 10 through the oil pumping hole 11, the pumping pipe 2 is lifted up, the packer 12 blocks the oil pumping hole 11, the crude oil is prevented from flowing back, the crude oil is discharged from the oil outlet hole 17 at the top, the pumping efficiency is ensured, and the pipe column is prevented from being stuck due to backflow.

[0036] In a preferred embodiment, the inside of the oil extraction pipe 2 is provided with a communication groove 13, and the outside of the oil extraction pipe 2 is provided with lubricating holes 14 equidistantly and symmetrically, the lubricating holes 14 are communicated with the communication groove 13, and the top of the oil extraction pipe 2 is fixedly connected with a connecting pipe 15, the bottom of the connecting pipe 15 extends into the inside of the communication groove 13, and the top of the connecting pipe 15 is connected with external lubricating oil equipment.

[0037] In the oil well long-term operation, the external lubricating oil equipment delivers lubricating oil to the communication groove 13 through the connecting pipe 15, the lubricating oil seeps out through the lubricating holes 14, and is applied on the contact surface between the oil extraction pipe 2 and the casing 1, so as to reduce the friction resistance and prevent the pipe string from being stuck due to too large friction.

[0038] In a preferred embodiment, the top of the oil pushing rod 3 is connected with a rotatable connecting support 16 through four fastening screws.

[0039] In the installation of the oil pushing rod 3, the rotatable connecting support 16 is fixed on the wellhead equipment through the four fastening screws, the connecting support 16 can be flexibly rotated in the operation process, the oil pushing operation at different angles is adapted, the stable connection of the oil pushing rod 3 is ensured, and the running failure of the pipe string caused by the angle problem is avoided.

[0040] In a preferred embodiment, the oil pushing rod 3, the first extension rod 4, the second extension rod 5, the connecting sleeve 6 and the rotating ball head 8 are all provided with hollow structures for the penetration of the connecting pipe 15.

[0041] In order to realize the long-distance delivery of the lubricating oil, the connecting pipe 15 penetrates the hollow structures of the oil pushing rod 3, the first extension rod 4, the second extension rod 5, the connecting sleeve 6 and the rotating ball head 8, the lubricating oil is smoothly delivered to the communication groove 13 of the oil extraction pipe 2, the pipeline layout is simplified, and the stable operation of the lubricating system is ensured.

[0042] In a preferred embodiment, the first extension rod 4 and the second extension rod 5 automatically adjust the angles under the action of the supporting member according to the shape and resistance of the casing 1.

[0043] When the casing 1 of the oil well is locally deformed or the downhole resistance is uneven, the first extension rod 4 and the second extension rod 5 automatically adjust the angles under the action of the supporting member, the pipe string is prevented from being stuck, and the normal operation of the oil well is ensured.

[0044] Working principle: when the oil liquid enters the inside of the casing 1 through the oil inlet hole 9 below the casing 1, the oil extraction pipe 2 is driven by the external driving device to reciprocate, the oil liquid enters the oil buffer groove 10 through the oil extraction hole 11 and pushes the sealing ball 12 to open the oil passage, and finally is discharged through the oil outlet hole 17;

[0045] The push oil rod 3 is connected with the oil extraction pipe 2 through the first extension rod 4, the connecting sleeve 6 and the second extension rod 5, the rotating ball head 8 makes each connecting part automatically adjust the angle according to the shape of the sleeve pipe 1 and the resistance under the action of the support, and realizes the self-adaptive anti-blocking function;

[0046] The external lubricating oil supply equipment delivers lubricating oil to the communication groove 13 through the connecting pipe 15, and the lubricating hole 14 uniformly distributes the lubricating oil to the contact surface between the oil extraction pipe 2 and the sleeve pipe 1, thereby reducing the frictional resistance;

[0047] The rotatable connecting support 16 ensures the effective connection of the push oil rod 3 with the external driving device, the whole device realizes the stable and efficient operation of the oil well pipe column through the self-adaptive angle adjustment and lubricating protection mechanism, and effectively prevents the occurrence of the blocking phenomenon.

[0048] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this. The substitution can be the substitution of part of the structure, device, method step, or the complete technical scheme. According to the technical scheme and the application concept of the present application, equivalent substitution or change should be covered in the protection scope of the present application.

Claims

1. An adaptive anti-sticking protection device for oil well tubing, comprising casing (1) and sucker tubing (2), characterized in that, The casing (1) has symmetrically spaced oil inlet holes (9) at equal intervals at the bottom. The oil sucker pipe (2) is slidably connected inside the casing (1). The casing also includes: The push rod (3) is located above the inside of the sleeve (1); The first extension rod (4) is threaded to the bottom of the push rod (3), and two connecting blocks (7) are fixedly connected to the bottom of each rod. The second extension rod (5) is threaded to the top of the sucker pipe (2), and two connecting blocks (7) are fixedly connected to the top of each of them; A connecting sleeve (6) is provided between the first extension rod (4) and the second extension rod (5), and two connecting blocks (7) are fixedly connected to both the top and bottom. Two rotating ball heads (8) are respectively disposed between the four corresponding connecting blocks (7).

2. The adaptive anti-jamming protection device for oil well tubing according to claim 1, characterized in that, The oil extraction pipe (2) has two oil-slowing grooves (10) inside. An oil extraction hole (11) is provided between the bottom of the oil extraction pipe (2) and the two oil-slowing grooves (10). A sealing ball (12) is provided inside the oil-slowing grooves (10) to cooperate with the oil extraction hole (11). An oil outlet hole (17) is symmetrically provided at the top of the oil extraction pipe (2).

3. The adaptive anti-jamming protection device for oil well tubing according to claim 1, characterized in that, The oil extraction pipe (2) has a connecting groove (13) inside. Lubrication holes (14) are symmetrically and evenly spaced on the outside of the oil extraction pipe (2). All lubrication holes (14) are connected to the connecting groove (13). A connecting pipe (15) is fixedly connected to the top of the oil extraction pipe (2). The bottom of the connecting pipe (15) extends into the interior of the connecting groove (13). The top of the connecting pipe (15) is connected to an external lubrication supply device.

4. The adaptive anti-jamming protection device for oil well tubing according to claim 1, characterized in that, The top of the push rod (3) is connected to a rotatable connecting bracket (16) by four fastening screws.

5. The adaptive anti-jamming protection device for oil well tubing according to claim 3, characterized in that, The push rod (3), the first extension rod (4), the second extension rod (5), the connecting sleeve (6), and the rotating ball head (8) are all designed with a hollow structure to facilitate the passage of the connecting pipe (15).

6. The adaptive anti-sticking protection device for oil well tubing according to claim 1, characterized in that, Under the action of the support, the first extension rod (4) and the second extension rod (5) automatically adjust their angles according to the shape of the sleeve (1) and the magnitude of the resistance.

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