Hydrostatic pressure sealing device for thermal oil extraction casing
The design of the positioning rod and the auger structure solves the problems of thread misalignment and loosening during oil casing connection, achieving the sealing and stability of the oil casing and preventing oil leakage.
Patent Information
- Application Number
- CN202520262889.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing oil casing is prone to thread misalignment during connection, which can cause damage, affect sealing, and loosen after connection, leading to oil leakage.
The system employs a positioning rod and a jack structure. The positioning rod limits the movement to prevent thread misalignment, while the jack ensures that the oil pipe can only rotate in one direction. Combined with a sealing ring and a rubber ring, a seal is achieved to prevent oil leakage.
It effectively prevents damage to threaded joints, ensures that the sealing of the oil casing connection is not affected, and avoids loosening and leakage.
Smart Images
Figure CN223754032U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of oil casing connection, and specifically relates to a hot production oil casing hydrostatic pressure sealing device. BACKGROUND
[0002] The oil casing is a kind of casing for ensuring the normal operation of the whole oil well during drilling and after well completion. According to different drilling depths and geological conditions, several layers of casing are used for each well. When the casing is connected and installed, a coupling is usually used to connect and limit the casing.
[0003] When the existing oil casing is connected and used, it is mostly connected by directly sleeving or using a clamp. When the oil casing is connected to each other by using a clamp, the threads between the oil casing and the clamp are prone to misalignment, which causes damage to the threads at the end of the threaded joint and affects the sealing performance of the connection between the oil casings. After the connected oil casing is used for a long time, the connection between them is also prone to rebounding and loosening, which causes poor sealing performance and causes oil leakage. UTILITY MODEL CONTENTS
[0004] The utility model aims at providing a hot production oil casing hydrostatic pressure sealing device to solve the problem of damage to the threaded joint between the oil casing and the clamp in the prior art, and the problem of loosening after connection, which affects the sealing performance of the connection between the oil casings.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a hot production oil casing hydrostatic pressure sealing device, comprising a connecting hoop, the outer side of both ends of the connecting hoop is rotatably connected with a first circular ring, a plurality of positioning rods are fixedly connected in a circumferential array on one side of both the first circular rings, both the first circular rings are fixedly connected with a worm wheel on the opposite side, both the worm wheels are provided with a second circular ring on the opposite side, both ends of the connecting hoop are threadedly connected with an oil pipe, and the outer side of one end of both the oil pipes is fixedly connected with a positioning plate.
[0006] Preferably, a plurality of positioning grooves matched with the plurality of positioning rods are formed in the interiors of both the positioning plates, the plurality of positioning rods are respectively penetrated through the plurality of positioning grooves and are slidably connected with the plurality of positioning grooves, and both the positioning plates are fixedly connected with a second sealing ring on one side. The oil pipe is limited by the plurality of positioning rods to prevent the misalignment of threads during connection, which causes damage to the threads at the end of the threaded joint and affects the sealing performance of the connection between the oil pipes.
[0007] Preferably, a sealing groove is formed in one end of both the second sealing rings, and a rubber ring is arranged in the interior of both the sealing grooves. Both ends of the connecting hoop are fixedly connected with a first sealing ring, both the first sealing rings are matched with both the sealing grooves respectively, and the rubber ring seals the threaded connection to prevent oil leakage.
[0008] Preferably, the two second circular rings are rotatably connected with the connecting hoop, and a plurality of clamping blocks are rotatably arranged on one side of each of the two second circular rings in a circumferential array, and the two pinwheels are respectively matched with the plurality of clamping blocks, so that the pinwheels can only rotate in one direction.
[0009] Preferably, one side of each of the two second circular rings is respectively matched with a pinwheel, and each of the two second circular rings is fixedly connected with a fixed ring on the outside, and each of the first circular rings is rotatably connected inside the two fixed rings.
[0010] Preferably, one end of each of the plurality of clamping blocks is fixedly connected with a spring sheet, and the plurality of spring sheets are respectively fixedly connected with the two fixed rings away from the clamping blocks.
[0011] Preferably, a limiting ring is arranged between the two second circular rings, the limiting ring is fixedly connected with the connecting hoop, the limiting ring is fixedly connected with a second positioning block on the outside, each of the two fixed rings is fixedly connected with a first positioning block on the outside, and each of the two first positioning blocks is fixedly connected with the second positioning block through a bolt.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] 1. When the oil pipe is rotated and screwed in, the positioning rod always limits the oil pipe, so that when the oil pipe is in contact with the connecting hoop, the threads of the oil pipe correspond to the connecting hoop, preventing the threads of the threaded joint end from being damaged due to thread misalignment, which affects the sealing between the oil sleeve and the pipe.
[0014] 2. The pinwheel allows the oil pipe to only rotate in one direction when the oil pipe is installed, so that the oil pipe cannot be screwed out of the connecting hoop when the oil pipe is reversed, thereby preventing the oil pipe from being loosened and affecting the sealing between the oil pipe and the connecting hoop. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0016] Figure 2 It is a sectional view of the internal structure of the utility model;
[0017] Figure 3 It is a schematic diagram of the sealing groove structure of the utility model;
[0018] Figure 4 It is a schematic diagram of the positioning rod structure of the utility model;
[0019] Figure 5 It is a schematic diagram of the pinwheel structure of the utility model.
[0020] The following are the labels in the diagram: 1. Connecting hoop; 2. First ring; 3. Limiting ring; 4. Fixing ring; 5. Positioning rod; 6. First positioning block; 7. Second positioning block; 8. First sealing ring; 9. Oil pipe; 10. Positioning plate; 11. Second sealing ring; 12. Sealing groove; 13. Rubber ring; 14. Wheel; 15. Clamping block; 16. Spring plate; 17. Second ring; 18. Positioning groove. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example: Figure 1 - Figure 4 As shown, this utility model provides a technical solution for a hydrostatic sealing device for a thermal oil recovery casing, including a connecting clamp 1. First rings 2 are rotatably connected to the outer sides of both ends of the connecting clamp 1. Multiple positioning rods 5 are fixedly connected to one side of each of the two first rings 2 in a circumferential array. Wheels 14 are fixedly connected to opposite sides of each of the two first rings 2. Second rings 17 are provided on opposite sides of each of the two wheels 14. Oil pipes 9 are threaded to both ends of the connecting clamp 1. Positioning plates 10 are fixedly connected to the outer sides of one end of each of the two oil pipes 9. Multiple positioning grooves 18, adapted to the multiple positioning rods 5, are provided inside each of the two positioning plates 10. The positioning rods 5 pass through multiple positioning grooves 18 and are slidably connected to them. Each of the two positioning plates 10 is fixedly connected to a second sealing ring 11 on one side. The oil pipe 9 is limited by the multiple positioning rods 5 to prevent thread misalignment during connection, which could damage the threaded joint end and affect the sealing performance of the oil pipe connection. Each of the two second sealing rings 11 has a sealing groove 12 at one end. Each of the two sealing grooves 12 is provided with a rubber ring 13. Each of the two ends of the connecting clamp 1 is fixedly connected to a first sealing ring 8. The two first sealing rings 8 are respectively adapted to the two sealing grooves 12. The rubber ring 13 seals the threaded connection to prevent oil leakage.
[0023] like Figure 1 , Figure 2 and Figure 5As shown, the two second circular rings 17 are rotatably connected with the connecting hoop 1, a plurality of clamping blocks 15 are rotatably installed on one side of the two second circular rings 17 in a circumferential array, the two worm gears 14 are respectively matched with the plurality of clamping blocks 15, so that the worm gears 14 can only rotate in one direction, the two worm gears 14 are respectively attached to one side of the two second circular rings 17, the two second circular rings 17 are respectively fixedly connected with the two fixed rings 4, the two first circular rings 2 are respectively rotatably connected inside the two fixed rings 4, the plurality of clamping blocks 15 are respectively fixedly connected with the spring plates 16 at one end, the plurality of spring plates 16 are respectively fixedly connected with the two fixed rings 4 away from the clamping blocks 15 at one end, the two second circular rings 17 are provided with the limiting ring 3 therebetween, the limiting ring 3 is fixedly connected with the connecting hoop 1, the limiting ring 3 is fixedly connected with the second positioning block 7 outside, the two fixed rings 4 are respectively fixedly connected with the first positioning block 6 outside, and the two first positioning blocks 6 are fixedly connected with the second positioning block 7 through bolts.
[0024] In use, the worker connects the oil pipe 9 through the connecting hoop 1, inserts the positioning slot 18 inside the positioning plate 10 after aligning the positioning slot 18 with the positioning rod 5, rotates the oil pipe 9 after the oil pipe 9 contacts the connecting hoop 1, and makes the oil pipe 9 enter the inside of the connecting hoop 1. The positioning rod 5 is slidably connected with the positioning slot 18, the positioning plate 10 is limited through the plurality of positioning rods 5, the first circular ring 2 is rotatably connected with the connecting hoop 1, the positioning rod 5 is fixedly connected with the first circular ring 2, the positioning rod 5 always limits the positioning plate 10 when the oil pipe 9 rotates and moves, the thread of the oil pipe 9 corresponds to the connecting hoop 1 when the oil pipe 9 contacts the connecting hoop 1, the thread of the threaded joint end is prevented from being damaged due to thread misplacement, the service life is affected, the first sealing ring 8 enters the sealing groove 12 provided in the second sealing ring 11 in the movement process of the oil pipe 9, at this time, the first sealing ring 8 is tightly attached to the rubber ring 13, the rubber ring 13 seals the connection between the oil pipe 9 and the connecting hoop 1, and the oil leakage is prevented.
[0025] When the oil pipe 9 is installed, the first positioning block 6 and the second positioning block 7 are fixedly connected through bolts, the first positioning block 6 is fixedly connected with the second ring 17 through the fixing ring 4, at this time, the second ring 17 cannot rotate. The first ring 2 rotates with the oil pipe 9, the first ring 2 drives the pinion 14 to rotate, the clamping block 15 is matched with the pinion 14, the elastic force of the spring sheet 16 makes the clamping block 15 always fit the oblique tooth surface of the pinion 14, when the pinion 14 rotates, the elastic force of the spring sheet 16 makes the tooth surface of the pinion 14 can drive the clamping block 15, so that the rotation of the pinion 14 is not affected, and when the pinion 14 reversely rotates, the clamping block 15 will block the pinion 14 under the elastic force of the spring sheet 16, so that the pinion 14 cannot rotate. Through the pinion 14, when the oil pipe 9 is installed, the oil pipe 9 can only rotate in one direction, the oil pipe 9 can only be screwed into the inside of the connecting hoop 1, when the oil pipe 9 reverses, the oil pipe 9 cannot rotate under the action of the pinion 14, so that the oil pipe 9 cannot be unscrewed from the inside of the connecting hoop 1, so that when the oil pipe 9 is used daily after installation, the oil pipe 9 will not back off and loosen, and the sealing between the oil pipe 9 and the connecting hoop 1 is affected. When the oil pipe 9 and the connecting hoop 1 need to be disassembled, the bolts fixing the first positioning block 6 and the second positioning block 7 are taken out, so that the limiting of the second ring 17 is released, at this time, the oil pipe 9 is reversed, the clamping block 15 will block the pinion 14, but at this time, the second ring 17 rotates with the pinion 14 under the action of the clamping block 15, so that the oil pipe 9 cannot be taken out.
[0026] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.
Claims
1. A thermal recovery oil casing hydrostatic seal apparatus, characterized by: The utility model relates to a connecting hoop (1) both ends outside rotation connection have first circular ring (2), two first circular ring (2) one side all are fixedly connected with multiple positioning rod (5) in circumferential array distribution, two first circular ring (2) opposite side all are fixedly connected with bushing (14), two bushing (14) opposite side all are provided with second circular ring (17), connecting hoop (1) both ends all are screwed with oil pipe (9), two oil pipe (9) one end outside all are fixedly connected with positioning plate (10).
2. A thermal recovery oil casing hydrostatic seal apparatus according to claim 1, wherein: Two positioning plate (10) inside all are provided with multiple positioning groove (18) of being matched with multiple positioning rod (5), multiple positioning rod (5) respectively passes through multiple positioning groove (18) and is connected with multiple positioning groove (18) slidingly, two positioning plate (10) one side all are fixedly connected with second sealing ring (11).
3. A thermal production casing hydrostatic seal apparatus as defined in claim 2, wherein: Two second sealing ring (11) one end all are provided with sealing groove (12), two sealing groove (12) inside all are provided with rubber ring (13), connecting hoop (1) both ends all are fixedly connected with first sealing ring (8), two first sealing ring (8) are matched with two sealing groove (12) respectively.
4. A hydrostatic seal apparatus for a thermal recovery oil casing as defined in claim 1, wherein: Two second circular ring (17) all are rotationally connected with connecting hoop (1), two second circular ring (17) one side all are rotationally installed with multiple clamping blocks (15) in circumferential array distribution, two bushing (14) are matched with multiple clamping blocks (15) respectively.
5. A hydrostatic seal for a thermal recovery oil casing as claimed in claim 4, wherein: Two second circular ring (17) one side are matched with two bushing (14) respectively, two second circular ring (17) outside all are fixedly connected with fixed ring (4), two first circular ring (2) are rotationally connected in two fixed ring (4) inside respectively.
6. A hydrostatic seal apparatus for a thermal recovery oil casing as defined in claim 5, wherein: Multiple clamping block (15) one end top all are fixedly connected with spring piece (16), multiple spring piece (16) away from clamping block (15) one end are fixedly connected with two fixed ring (4) respectively.
7. A hydrostatic seal for a thermal recovery oil casing as claimed in claim 6, wherein: Two second circular ring (17) between be provided with limiting ring (3), limiting ring (3) are fixedly connected with connecting hoop (1), limiting ring (3) outside are fixedly connected with second positioning block (7), two fixed ring (4) outside all are fixedly connected with first positioning block (6), two first positioning block (6) all are fixedly connected with second positioning block (7) through bolt.