Liquid level sealing and controlling device for bailing well

Abstract

The utility model relates to the technical field of bailing well sealing control, in particular to a bailing well liquid level sealing control device which comprises a bailing well upper gland, a bailing well lower gland and two U-shaped clamping seats, the bailing well upper gland and the bailing well lower gland are both of a cylindrical structure, through holes are formed in the centers of the bailing well upper gland and the bailing well lower gland, and a hand wheel is arranged at the upper end of the bailing well upper gland. A quick sealing clamp is arranged on the outer wall of the bailing underground gland, a plurality of stable supporting rods are evenly arranged at the lower end of the bailing underground gland, the upper ends of the stable supporting rods are embedded into the bailing underground gland, a plurality of stable discs are sleeved on the stable supporting rods, and the lower ends of the stable supporting rods are connected with a protective supporting disc. A sealing rubber ring is arranged at the lower end of the protection type supporting disc, and a second U-shaped clamping base is arranged at the lower end of the sealing rubber ring. According to the device, the wellhead is sealed and fixed through the rapid sealing hoop, the stability and supporting performance of underground work are enhanced through the stable supporting rod and the stable disc, the hand wheel controls the linkage type extrusion mechanism to control the sealing rubber ring, and the working efficiency and the operation safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing and controlling a salvage well, in particular to a sealing and controlling device for a liquid level in a salvage well. Background Art

[0002] During the oilfield production and development process, as the oilfield production capacity gradually decreases, the proportion of salvage wells in oilfield production is increasing. The production process of salvage wells requires the insertion of a salvage pump at the wellhead for oil extraction and production. After each oil extraction, it is necessary to wait for the production capacity liquid level to recover before the next oil extraction can be carried out. However, since the equipment of the salvage well on the ground only has a wellhead device and no effective insulation facilities, especially in the high-cold season and high-cold oilfields, when the liquid level in the salvage well recovers production capacity, the liquid level often freezes in the permafrost layer.

[0003] According to statistics, about 60% of the wells have the problem of frozen liquid surface in winter. Once the liquid surface in the well freezes, the oil recovery pump cannot be lowered into the well to recover oil. Although some wells are protected from freezing by wrapping with insulation materials, the effect is not obvious. The current method of dealing with frozen liquid surface is mainly to mobilize various vehicles and equipment such as boiler trucks on site to thaw them before oil recovery operations can be carried out. This method not only delays the efficiency of oil recovery and work plans, but also brings about the problem of high-voltage injuries and production cost losses caused by the deployment of special vehicles and other equipment. If employees violate regulations by burning the wellhead to deal with the freezing, it will greatly increase the safety risks of equipment and personnel. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The utility model provides a well liquid surface sealing and controlling device to overcome the problem in the prior art that the well liquid freezes in a low temperature environment and special equipment is needed to process the frozen well liquid.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model provides a lifting well liquid level sealing and controlling device, comprising: a lifting well upper pressure cover, a lifting well lower pressure cover and two U-shaped clamping seats;

[0008] The two U-shaped card seats include: a first U-shaped card seat and a second U-shaped card seat;

[0009] The upper gland of the salvage well is a cylindrical structure, and a through hole is provided in the center of the upper gland of the salvage well. A lower gland of the salvage well is provided at the lower end of the upper gland of the salvage well. The lower gland of the salvage well is a cylindrical structure, and a through hole is provided in the center of the lower gland of the salvage well.

[0010] The upper end of the pressure cover on the lifting well is provided with a hand wheel, the lower end of the hand wheel is connected to a linkage extrusion mechanism, and the center of the upper end of the hand wheel is provided with a first U-shaped clamping seat;

[0011] The outer wall of the downhole gland is provided with a quick sealing clamp, and the lower end of the downhole gland is evenly provided with a plurality of stable support rods, and the upper ends of the plurality of stable support rods are respectively embedded in the downhole gland;

[0012] The stabilizing support rod is sleeved with a plurality of stabilizing disks, the lower end of the stabilizing support rod is connected to the protective support disk, the lower end of the protective support disk is provided with a sealing rubber ring, and the lower end of the sealing rubber ring is provided with a second U-shaped seat;

[0013] A lifting hook is provided at the lower end of the second U-shaped holder, and the linkage extrusion mechanism passes through the upper pressure cover of the lifting well, the lower pressure cover of the lifting well, a plurality of stabilizing plates and is connected to the center of the upper end of the protective support plate in sequence.

[0014] Preferably, the U-shaped base is composed of two parts, the lower end of the U-shaped base is a cylindrical structure, the upper end of the U-shaped base is symmetrically provided with rectangular structures perpendicular to the lower end, and a penetrating cylindrical structure is provided between the two symmetrical rectangular structures.

[0015] Preferably, the first U-shaped holder and the second U-shaped holder are symmetrically arranged, and one end of the cylindrical structure of the first U-shaped holder is integrated with the hand wheel.

[0016] Preferably, the stabilizing disk is a circular ring structure, and is provided with through holes matching with a plurality of stabilizing support rods.

[0017] Preferably, the lifting hook consists of two parts, the upper end of the lifting hook is a cylindrical structure, and the lower end of the lifting hook is a hook.

[0018] Preferably, the protective support plate and the second U-shaped holder are connected via a connecting column.

[0019] Preferably, the quick sealing clamp is fixedly connected to the wellhead of the bailing well by bolts.

[0020] Preferably, the sealing rubber ring is an annular structure, and the sealing rubber ring is sleeved on the outer wall of the connecting column between the second U-shaped seat and the protective support plate.

[0021] Preferably, the protective support plate can slide along the connecting column, and by turning the hand wheel, the protective support plate can slide to squeeze the sealing rubber ring, so that the sealing rubber ring expands outward to seal the wellhead.

[0022] Preferably, a thread is provided in the central through hole of the pressure cover on the bailing well.

[0023] (III) Beneficial effects

[0024] The utility model provides a liquid level sealing and controlling device for a salvage well, which can realize sealing and fixing the device at the wellhead of the salvage well by using a quick sealing clamp, and enhances the stability and support of the device when working underground by arranging a stabilizing support rod and a plurality of stabilizing disks, so that the device is more stable during use, and improves the safety and reliability of the operation, and controls the expansion state of the sealing rubber ring by connecting a linkage extrusion mechanism with a hand wheel, and rotating the hand wheel can control the protective support disk to move downward to extrude the sealing rubber ring, thereby changing the expansion state of the sealing rubber ring, and sealing the wellhead is realized, and freezing of the salvage well is prevented in a low temperature state, and the device is coordinated with a downhole oil pipe lifting ring by a salvage hook to realize the lowering of the device, thereby achieving the purpose of improving work efficiency and operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model shows a schematic structural diagram of a liquid surface sealing and controlling device for a fishing well.

[0026] Among them: 1: lifting well upper pressure cover; 2: lifting well lower pressure cover; 3: linkage extrusion mechanism; 4: hand wheel; 5: quick sealing clamp; 6: U-shaped clamping seat; 7: stable support rod; 8: protective support plate; 9: sealing rubber ring; 10: lifting hook; 11: stable plate. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by "up", "down", "left", "right", "inside", "outside", "top" and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0029] like Figure 1 As shown, the utility model provides a liquid level sealing and controlling device for a salvage well, comprising: a salvage well upper pressure cover 1, a salvage well lower pressure cover 2 and two U-shaped clamping seats 6;

[0030] The two U-shaped holders 6 include: a first U-shaped holder and a second U-shaped holder. The U-shaped holder 6 is composed of two parts. The lower end of the U-shaped holder 6 is a cylindrical structure. The upper end of the U-shaped holder 6 is symmetrically provided with rectangular structures perpendicular to the lower end. A cylindrical structure is provided between the two symmetrical rectangular structures. The first U-shaped holder is used to lift the device out of the wellhead after use. One end of the cylindrical structure of the first U-shaped holder is integrated with the hand wheel 4.

[0031] The upper pressure cover 1 of the lifting well is a cylindrical structure, and a through hole is provided in the center of the upper pressure cover 1 of the lifting well, and a thread is provided in the center through hole. The lower end of the upper pressure cover 1 of the lifting well is provided with a lower pressure cover 2 for the lifting well. The lower pressure cover 2 for the lifting well is a cylindrical structure, and a through hole is provided in the center of the lower pressure cover 2 for the lifting well. The upper end of the upper pressure cover 1 of the lifting well is provided with a hand wheel 4, and a linkage extrusion mechanism 3 is connected to the lower end of the hand wheel 4. A first U-shaped seat is provided in the center of the upper end of the hand wheel 4. The linkage extrusion mechanism 3 can be moved up and down by rotating the hand wheel 4, thereby achieving the purpose of extrusion or release.

[0032] The outer wall of the downhole pressure cover 2 is provided with a quick sealing clamp 5, and the quick sealing clamp 5 is fixedly connected to the wellhead of the lifting well by bolts. This design enables the device to be quickly and firmly sealed and fixed to the wellhead of the lifting well, ensuring the safety of the device during use. The lower end of the downhole pressure cover 2 is evenly circumferentially provided with a plurality of stabilizing support rods 7, and the upper ends of the plurality of stabilizing support rods 7 are respectively embedded in the downhole pressure cover 2 for lifting. The plurality of stabilizing support rods 7 are sleeved with a plurality of stabilizing disks 11, and the stabilizing disks 11 are annular structures, and each stabilizing disk 11 is provided with through holes matching the plurality of stabilizing support rods 7, and the plurality of stabilizing support rods 7 pass through these through holes respectively. The arrangement of the plurality of stabilizing support rods and the plurality of stabilizing disks not only enhances the stability and support of the device when working underground, but also makes the device more stable during use, effectively improving the safety and reliability of the operation;

[0033] The lower end of the stabilizing support rod 7 is connected to the protective support plate 8. The design of the protective support plate 8 further enhances the overall stability of the device to prevent tilting or shaking during operation. Through the arrangement of these stabilizing support rods 7 and the stabilizing plate 11, the device can maintain good stability and support in the underground environment, ensuring the smooth progress of the operation.

[0034] The protective support plate 8 is provided with a sealing rubber ring 9 at the lower end. The sealing rubber ring 9 is made of a highly elastic material to ensure that it can expand outward when squeezed to form an effective seal. The sealing rubber ring 9 is provided with a second U-shaped card seat at the lower end. The second U-shaped card seat is arranged opposite to the first U-shaped card seat. The lower end of the second U-shaped card seat is provided with a lifting hook 10. The lifting hook 10 is used to cooperate with the downhole oil pipe lifting ring to realize the lowering of the device. The lifting hook 10 consists of two parts. The upper end of the lifting hook 10 is a cylindrical structure, and the lower end of the lifting hook 10 is a hook for connecting with the oil pipe lifting ring.

[0035] The linkage extrusion mechanism 3 sequentially passes through the upper gland 1 of the lifting well, the lower gland 2 of the lifting well, and a plurality of stabilizing plates 11 and is connected to the center of the upper end of the protective support plate 8. The linkage extrusion mechanism 3 can rotate along the thread in the central through hole of the upper gland 1 of the lifting well, thereby realizing the up and down movement control of the protective support plate 8. By rotating the hand wheel 4, the linkage extrusion mechanism 3 will drive the protective support plate 8 to move downward, thereby squeezing the sealing rubber ring 9 to expand it outward to form a seal for the wellhead;

[0036] The protective support disc 8 is connected to the second U-shaped holder by a connecting column, the design of which ensures that the protective support disc 8 can slide smoothly along the connecting column, and the sealing rubber ring 9 is sleeved on the outer wall of the connecting column between the second U-shaped holder and the protective support disc 8, and the expansion state of the sealing rubber ring 9 is controlled by connecting the linkage extrusion mechanism 3 through the hand wheel 4. Specifically, when it is necessary to seal the wellhead, the operator can turn the hand wheel 4 to make the linkage extrusion mechanism 3 drive the protective support disc 8 to move downward, thereby squeezing the sealing rubber ring 9 to expand outward to form a seal, and when it is necessary to release the seal, the hand wheel 4 is turned in the opposite direction to move the protective support disc 8 upward, reducing the squeezing of the sealing rubber ring 9, and the sealing rubber ring 9 returns to its original state, thereby releasing the seal of the wellhead.

[0037] The actual working scenario of a liquid level sealing and controlling device for a salvage well is introduced in detail below.

[0038] The actual operation of the device for sealing and controlling the liquid level of the bailing well includes the following steps:

[0039] Step S1, during the installation process, the stabilizing support rod 7 is embedded in the downhole pressure cap 2, and a stabilizing plate 11 is put on each stabilizing support rod 7 to enhance the stability and support of the device in the well, the protective support plate 8 is connected to the lower end of the stabilizing support rod 7, the sealing rubber ring 9 is put on the outer wall of the connecting column between the second U-shaped card seat and the protective support plate 8, the device is matched with the downhole oil pipe lifting ring through the lifting hook 10 to realize the lowering of the device, and after reaching the designated position, the downhole pressure cap 2 is fixed to the wellhead of the lifting well through the quick sealing clamp 5 to ensure the sealing between the device and the wellhead;

[0040] Step S2, sealing process, the operator rotates the hand wheel 4 to make the linkage extrusion mechanism 3 drive the protective support plate 8 to move downward, thereby squeezing the sealing rubber ring 9 to expand outward to form a seal for the wellhead. The sealing rubber ring 9 is made of a highly elastic material and can expand outward when squeezed to ensure the sealing effect of the wellhead;

[0041] Step S3, releasing the sealing process, reversely rotating the hand wheel 4 to move the protective support plate 8 upward, reducing the squeezing of the sealing rubber ring 9, and the sealing rubber ring 9 returns to its original state, releasing the sealing of the wellhead;

[0042] Step S4, the catching process, through the design of the first U-shaped holder and the hand wheel 4, the operator can easily catching the device out of the wellhead for maintenance or replacement.

[0043] It can be understood that the above-mentioned various embodiments mentioned in the present invention can be combined with each other to form a combined embodiment without violating the principle logic. Due to space limitations, the present invention will not elaborate on them.

[0044] Those skilled in the art will appreciate that, in the above method of specific implementation, the order in which the steps are written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of the steps should be determined by their functions and possible internal logic.

[0045] The utility model provides a salvage well liquid level sealing and control device that uses a quick sealing clamp 5 to seal and fix the device at the wellhead of the salvage well, and through the arrangement of a plurality of stabilizing support rods 7 and a plurality of stabilizing disks 11, the stability and support of the device when working underground are enhanced, so that the device is more stable during use, and the safety and reliability of the operation are improved. The expansion state of the sealing rubber ring 9 is controlled by connecting the linkage extrusion mechanism 3 through the hand wheel 4. The hand wheel 4 can be turned to control the protective support disk 8 to move downward to extrude the sealing rubber ring 9, change the expansion state of the sealing rubber ring 9, and realize the sealing of the wellhead, prevent the salvage well from freezing under low temperature conditions, and the device is coordinated with the downhole oil pipe lifting ring through the salvage hook 10 to realize the lowering of the device, thereby achieving the purpose of improving work efficiency and operation safety.

[0046] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A liquid level sealing and controlling device for a bailing well, characterized in that: include: An upper gland (1) of the lifting well, a lower gland (2) of the lifting well, and two U-shaped holders (6); The two U-shaped card seats (6) include: a first U-shaped card seat and a second U-shaped card seat; The upper gland (1) of the salvage well is a cylindrical structure, a through hole is provided at the center of the upper gland (1) of the salvage well, a lower gland (2) of the salvage well is provided at the lower end of the upper gland (1) of the salvage well, the lower gland (2) of the salvage well is a cylindrical structure, a through hole is provided at the center of the lower gland (2) of the salvage well; The upper end of the lifting well upper cover (1) is provided with a hand wheel (4), the lower end of the hand wheel (4) is connected to a linkage extrusion mechanism (3), and the center of the upper end of the hand wheel (4) is provided with a first U-shaped clamping seat; The outer wall of the downhole gland (2) is provided with a quick sealing clamp (5), and a plurality of stabilizing support rods (7) are evenly arranged at the lower end of the downhole gland (2), and the upper ends of the plurality of stabilizing support rods (7) are respectively embedded in the downhole gland (2); A plurality of stabilizing plates (11) are sleeved on the stabilizing support rod (7); the lower end of the stabilizing support rod (7) is connected to the protective support plate (8); a sealing rubber ring (9) is provided at the lower end of the protective support plate (8); and a second U-shaped holder is provided at the lower end of the sealing rubber ring (9); A lifting hook (10) is provided at the lower end of the second U-shaped holder, and the linkage extrusion mechanism (3) sequentially passes through the upper pressure cover (1) of the lifting well, the lower pressure cover (2) of the lifting well, and a plurality of stabilizing plates (11) to be connected to the center of the upper end of the protective support plate (8).

2. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: The U-shaped card seat (6) is composed of two parts. The lower end of the U-shaped card seat (6) is a cylindrical structure. The upper end of the U-shaped card seat (6) is symmetrically provided with rectangular structures perpendicular to the lower end. A penetrating cylindrical structure is provided between the two symmetrical rectangular structures.

3. The liquid level sealing and controlling device for a fishing well according to claim 2, characterized in that: The first U-shaped card seat and the second U-shaped card seat are symmetrically arranged, and one end of the cylindrical structure of the first U-shaped card seat is integrally formed with the hand wheel (4).

4. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: The stabilizing disk (11) is a circular ring structure, and is provided with through holes matching a plurality of stabilizing support rods (7).

5. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: The lifting hook (10) is composed of two parts, the upper end of the lifting hook (10) is a cylindrical structure, and the lower end of the lifting hook (10) is a hook.

6. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: The protective support plate (8) is connected to the second U-shaped holder via a connecting column.

7. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: The quick sealing clamp (5) is fixedly connected to the wellhead of the fishing well via bolts.

8. The liquid level sealing and controlling device for a fishing well according to claim 6, characterized in that: The sealing rubber ring (9) is an annular structure, and is sleeved on the outer wall of the connecting column between the second U-shaped holder and the protective support plate (8).

9. The liquid level sealing and controlling device for a fishing well according to claim 8, characterized in that: The protective support plate (8) can slide along the connecting column, and by turning the hand wheel (4), the protective support plate (8) can slide to squeeze the sealing rubber ring (9), so that the sealing rubber ring (9) expands outward to seal the wellhead.

10. The liquid level sealing and controlling device for a fishing well according to claim 1, characterized in that: A thread is provided in the central through hole of the pressure cover (1) on the bailing well.

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