Split type casing hanger

Abstract

The utility model relates to the technical field of petroleum, and discloses a split type casing hanger which comprises a casing head body, a hanger body is fixedly installed at the upper end of the interior of the casing head body, a connecting pipeline is fixedly installed on the lower inner wall of the casing head body, a circular groove is formed in the lower surface of the hanger body, and the connecting pipeline is fixedly installed in the circular groove. The sealing mechanism is arranged on the hanger body and comprises four tightening plates and a first metal sealing ring, sliding grooves are formed in the front inner wall and the rear inner wall of the circular groove correspondingly, and the four tightening plates are slidably installed in the two sliding grooves correspondingly; the connecting position of the second metal sealing ring and the first metal sealing ring and the connecting position of the hanger body and the casing pipe are sealed through the second metal sealing ring and the first metal sealing ring and the rubber sealing gasket, and the situation that when the internal pressure is too large, petroleum leaks from the connecting position of the hanger body and the connecting pipeline is prevented; the sealing performance of the split type casing hanger is improved, and therefore the petroleum conveying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum, and particularly relates to a split casing hanger. Background Technique

[0002] Casing hangers are divided into two types: slip type and mandrel type. During the cementing process, casing hangers are usually used to hang the casing and seal the annulus between the double casings.

[0003] When the current split casing hanger is in use, usually after the casing is placed inside the split casing hanger, the casing is fixed, and then the casing is used to transport oil. However, when the pressure inside the casing increases, it will cause the pressure on the seal to increase, resulting in poor sealing performance, and oil will flow out from the connection inside the casing hanger, causing losses. Summary of the Utility Model

[0004] (1) Technical Problem to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a split casing hanger, which solves the problem that when the casing is used to transport oil, when the pressure inside the casing increases, it will cause the pressure on the seal to increase, resulting in poor sealing performance, and oil will flow out from the connection inside the casing hanger, causing losses.

[0006] (2) Technical Solution

[0007] To achieve the above object, the utility model provides the following technical solution: A split casing hanger, including a casing head body, a hanger body is fixedly installed at the upper end inside the casing head body, a connecting pipe is fixedly installed on the lower inner wall of the casing head body, and a circular groove is opened on the lower surface of the hanger body;

[0008] A sealing mechanism is arranged on the hanger body. The sealing mechanism includes four tightening plates and a first metal sealing ring. Sliding grooves are opened on the front and rear inner walls of the circular groove. The four tightening plates are respectively slidably installed inside the two sliding grooves, and the first metal sealing ring is fixedly installed on the upper inner wall of the circular groove.

[0009] Preferably, the sealing mechanism further includes two semi-circular plates and a rubber sealing pad. One semi-circular plate is fixedly installed on the two tightening plates on the left side, and the other tightening plate is fixedly installed on the two tightening plates on the right side. The two semi-circular plates are both slidably connected to the upper inner wall of the circular groove. Grooves are opened on the two semi-circular plates, and the rubber sealing pad is slidably installed in the grooves of the two semi-circular plates, and the rubber sealing pad is in contact with the first metal sealing ring.

[0010] Preferably, an annular groove is formed on the upper surface of the connecting pipe. The lower end of the hanger body is slidably connected to the inner wall of the annular groove. A second metal sealing ring is fixedly installed on the lower inner wall of the annular groove, and the second metal sealing ring is in close contact with the first metal sealing ring.

[0011] Preferably, a bidirectional threaded rod is rotatably installed inside each of the two sliding grooves. The two bidirectional threaded rods are respectively threadedly connected to the corresponding upper tightening plates. Rectangular grooves are formed on the right surfaces of the two bidirectional threaded rods. A rotating handle adapted to each of the two rectangular grooves is slidably installed inside each of the two rectangular grooves. The right ends of the two rotating handles respectively extend rotatably to the right surface of the casing head body.

[0012] Preferably, a positioning plate is fixedly installed on the lower surface of the hanger body. A positioning groove is formed on the connecting pipe at a position corresponding to the positioning plate. The positioning plate is slidably inserted into the positioning groove.

[0013] Preferably, an oil pipeline is slidably installed on the inner wall of the connecting pipe. A casing is installed at the upper end of the inner wall of the hanger body. The lower end of the casing extends into the oil pipeline.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present utility model provides a split casing hanger, which has the following

[0016] beneficial effects:

[0017] 1. For this split casing hanger, the second metal sealing ring, the first metal sealing ring, and the rubber sealing pad seal both the connection between the second metal sealing ring and the first metal sealing ring and the connection between the hanger body and the casing, preventing oil from leaking at the connection between the hanger body and the connecting pipe when the internal pressure is too high, improving the sealing performance of this split casing hanger, and thus improving the oil transportation efficiency.

[0018] 2. For this split casing hanger, the positioning plate and the positioning groove are used to position the installation positions of the hanger body and the connecting pipe, so that the holes on the hanger body and the connecting pipe can correspond to each other, facilitating the two rotating handles to tighten the two semi-circular plates and squeeze the two rubber sealing pads, improving the installation efficiency of this split casing hanger, and thus improving the usage efficiency of this split casing hanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic top view structure diagram of the split casing hanger of the present utility model as a whole;

[0020] Figure 2 is a schematic front sectional view structure diagram of the split casing hanger of the present utility model;

[0021] Figure 3 For Figure 2 The enlarged structural schematic diagram at position A in

[0022] Figure 4 This is the internal sectional top view structural schematic diagram of the split casing hanger of the present utility model;

[0023] Figure 5 For Figure 4 The enlarged structural schematic diagram at position B in

[0024] In the figure: 1, casing head body; 2, hanger body; 3, connecting pipe; 4, circular groove; 5, tightening plate; 6, semi-circular plate; 7, sliding groove; 8, first metal sealing ring; 9, rubber sealing pad; 10, annular groove; 11, second metal sealing ring; 12, bidirectional threaded rod; 13, rectangular groove; 14, turning handle; 15, positioning plate; 16, positioning groove; 17, oil pipeline; 18, casing. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1-5 , the present utility model provides a new technical solution: a split casing hanger, including a casing head body 1, a hanger body 2 is fixedly installed at the upper end inside the casing head body 1, a connecting pipe 3 is fixedly installed on the lower inner wall of the casing head body 1, and a circular groove 4 is opened on the lower surface of the hanger body 2;

[0027] A sealing mechanism, the sealing mechanism is arranged on the hanger body 2, the sealing mechanism includes four tightening plates 5 and a first metal sealing ring 8, sliding grooves 7 are opened on the front and rear inner walls of the circular groove 4, and the four tightening plates 5 are respectively slidably installed inside the two sliding grooves 7, and the first metal sealing ring 8 is fixedly installed on the upper inner wall of the circular groove 4.

[0028] Furthermore, the sealing mechanism further includes two semi-circular plates 6 and a rubber sealing pad 9, one semi-circular plate 6 is fixedly installed on the two tightening plates 5 on the left side, and the other tightening plate 5 is fixedly installed on the two tightening plates 5 on the right side. The two semi-circular plates 6 are both slidably connected to the upper inner wall of the circular groove 4. Grooves are opened on the two semi-circular plates 6, and the rubber sealing pad 9 is slidably installed in the grooves of the two semi-circular plates 6, and the rubber sealing pad 9 is in contact with the first metal sealing ring 8.

[0029] Furthermore, an annular groove 10 is formed on the upper surface of the connecting pipe 3. The lower end of the hanger body 2 is slidably connected to the inner wall of the annular groove 10. A second metal sealing ring 11 is fixedly installed on the lower inner wall of the annular groove 10, and the second metal sealing ring 11 is in close contact with the first metal sealing ring 8.

[0030] Furthermore, a double-threaded screw rod 12 is rotatably installed inside each of the two sliding grooves 7. The two double-threaded screw rods 12 are respectively threadedly connected to the corresponding tightening plates 5. A rectangular groove 13 is formed on the right surface of each of the two double-threaded screw rods 12. A rotating handle 14 adapted to it is slidably installed inside each of the two rectangular grooves 13. The right ends of the two rotating handles 14 respectively extend rotatably to the right surface of the casing head body 1.

[0031] Furthermore, the connection between the second metal sealing ring 11 and the first metal sealing ring 8 and the connection between the hanger body 2 and the casing 18 are sealed by the second metal sealing ring 11, the first metal sealing ring 8 and the rubber gasket 9, preventing oil from leaking from the connection between the hanger body 2 and the connecting pipe 3, improving the sealing performance of the split casing hanger, thus reducing the possibility of oil leakage and improving the oil transportation efficiency.

[0032] Furthermore, a positioning plate 15 is fixedly installed on the lower surface of the hanger body 2. A positioning groove 16 is formed on the connecting pipe 3 at a position corresponding to the positioning plate 15. The positioning plate 15 is slidably inserted into the positioning groove 16.

[0033] Furthermore, the installation positions of the hanger body 2 and the connecting pipe 3 are positioned through the positioning plate 15 and the positioning groove 16, so that the holes on the hanger body 2 and the connecting pipe 3 can correspond to each other, facilitating the two rotating handles 14 to tighten the two semi-circular plates 6 and squeeze the two rubber gaskets 9, improving the installation efficiency of the split casing hanger and thus improving the use efficiency of the split casing hanger.

[0034] Furthermore, an oil pipeline 17 is slidably installed on the inner wall of the connecting pipe 3. A casing 18 is installed at the upper end of the inner wall of the hanger body 2. The lower end of the casing 18 extends into the oil pipeline 17, and a sealing member is installed at the upper end of the inner wall of 2.

[0035] Working principle: When using this casing hanger, first install the hanger body 2 and the connecting pipe 3 into the inside of the casing head body 1, so that the lower end of the hanger body 2 enters the inside of the annular groove 10, and make the second metal sealing ring 11 contact with the first metal sealing ring 8, so as to seal the hanger body 2 and the connecting pipe 3 once. Then align the two turning handles 14 with the two holes on the casing head body 1 and push the turning handles 14 in, and turn them a few times to make the two rectangular plates on the turning handles 14 enter the corresponding rectangular grooves 13. After entering, turn the two turning handles 14 to drive the two double-threaded rods 12 to rotate. The rotation of the two double-threaded rods 12 makes the two tightening plates 5 threadedly connected to them approach each other, so that the semi-circular plates 6 fixedly connected to the left tightening plate 5 and the right tightening plate 5 approach each other, so that the two semi-circular plates 6 squeeze the rubber sealing pad 9 in the groove on the semi-circular plate 6, so that the rubber sealing pad 9 is in close contact with the first metal sealing ring 8 and the second metal sealing ring 11, so as to further seal the hanger body 2 and the connecting pipe 3, improve the sealing performance at the connection between the hanger body 2 and the connecting pipe 3. There are two grooves on the surface of the casing head body 1 corresponding to the positions of the two turning handles 14. After tightening, the two turning handles 14 can be pushed into the two grooves to fix the two double-threaded rods 12. After that, the oil pipeline 17 enters the inside of the hanger body 2 through the upper end of the connecting pipe 3, and the casing 18 fixedly installed at the upper end of the inner wall of the hanger body 2 enters the inside of the oil pipeline 17. After installing the sealing member at the upper end of the inner wall of the hanger body 2, seal between the hanger body 2 and the casing 18 to prevent the oil from flowing out from the connection between the hanger body 2 and the connecting pipe 3 when the oil flow rate is too fast or the pressure is too high, causing losses and affecting the oil transportation.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split casing hanger, comprising a casing head body (1), a hanger body (2) being fixedly mounted on the inner upper end of the casing head body (1), and a connecting pipe (3) being fixedly mounted on the lower inner wall of the casing head body (1), characterized in that: A circular groove (4) is formed on the lower surface of the hanger body (2); The sealing mechanism is arranged on the hanger body (2), and comprises four tightening plates (5) and a first metal sealing ring (8). The front and rear inner walls of the circular groove (4) are both provided with sliding grooves (7). The four tightening plates (5) are respectively slidably mounted inside the two sliding grooves (7), and the first metal sealing ring (8) is fixedly mounted on the upper inner wall of the circular groove (4).

2. A split casing hanger according to claim 1, characterized in that: The sealing mechanism also includes two semi-annular plates (6) and a rubber sealing pad (9), one semi-annular plate (6) is fixedly mounted on the two tightening plates (5) on the left, and the other tightening plate (5) is fixedly mounted on the two tightening plates (5) on the right, the two semi-annular plates (6) are slidably connected to the upper inner wall of the circular groove (4), the two semi-annular plates (6) are provided with grooves, the rubber sealing pad (9) is slidably mounted in the grooves of the two semi-annular plates (6), and the rubber sealing pad (9) is in contact with the first metal sealing ring (8).

3. A split casing hanger according to claim 1, characterized in that: The upper surface of the connecting pipe (3) is provided with an annular groove (10), the lower end of the hanger body (2) is slidably connected to the inner wall of the annular groove (10), a second metal sealing ring (11) is fixedly mounted on the lower inner wall of the annular groove (10), and the second metal sealing ring (11) and the first metal sealing ring (8) are in close contact with each other.

4. A split casing hanger according to claim 1, characterized in that: A bidirectional threaded rod (12) is rotatably mounted inside the two sliding grooves (7), and the two bidirectional threaded rods (12) are respectively threadedly connected to the corresponding tightening plates (5). A rectangular groove (13) is provided on the right surface of the two bidirectional threaded rods (12), and a turning handle (14) adapted thereto is slidably mounted inside the two rectangular grooves (13), and the right ends of the two turning handles (14) are respectively rotatably extended to the right surface of the casing head body (1).

5. A split casing hanger according to claim 1, characterized in that: A positioning plate (15) is fixedly mounted on the lower surface of the hanger body (2), a positioning groove (16) is provided on the connecting pipe (3) at a position corresponding to the positioning plate (15), and the positioning plate (15) is slidably inserted into the interior of the positioning groove (16).

6. A split casing hanger according to claim 1, characterized in that: An oil pipeline (17) is slidably mounted on the inner wall of the connecting pipe (3), a sleeve (18) is mounted on the upper end of the inner wall of the hanger body (2), and the lower end of the sleeve (18) extends into the interior of the oil pipeline (17).

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