Telescopic thermal recovery casing head

Abstract

The utility model relates to the technical field of gas production, in particular to a telescopic thermal recovery casing head which comprises a lower pipeline, a sleeve joint, an upper pipeline, a telescopic pipe body, steam through pipes and flanges, the telescopic pipe body is arranged on the lower pipeline, the sleeve joint is arranged at the bottom of the lower pipeline, and the steam through pipes are arranged at the two ends of the upper pipeline through reserved grooves; an annular inner protruding block is arranged at the position, close to the top, of the inner wall of the upper pipeline, a cover body is fixed to the top of the annular inner protruding block through a fastening bolt, external threads are arranged on the periphery of the top end of the upper pipeline, and second internal threads corresponding to the external threads are arranged on the inner wall of the cover body. A first connecting disc and a second connecting disc are arranged at the positions, close to each other, of the lower pipeline body and the upper pipeline body correspondingly, and the first connecting disc and the second connecting disc are connected in a fastened mode through connecting bolts. The device is provided with a part which can be conveniently opened and is used for overhauling, and the part used for overhauling is good in stabilizing effect when being fixed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production, in particular to a telescopic thermal production casing head. Background Art

[0002] The telescopic thermal recovery casing head is a device used in thermal recovery oil wells. This device is usually made of metal material and has a certain degree of elasticity, which can adapt to the changes in wellhead temperature and the pressure generated.

[0003] In the past, the telescopic part of the thermal recovery casing head was prone to accumulate impurities, which needed to be cleaned. In the past, there was no part that could be easily opened for maintenance, and the maintenance part was not stable enough when fixed. Utility Model Content

[0004] In view of the problems in the prior art, the utility model provides a telescopic thermal recovery casing head, which is provided with a part for maintenance which can be conveniently opened, and the part for maintenance has a good stabilizing effect when fixed.

[0005] The technical solution adopted by the utility model to solve the technical problem is a telescopic thermal recovery casing head, comprising a lower pipeline, a sleeve joint, an upper pipeline, a telescopic pipe body, a steam through pipe and a flange, wherein the lower pipeline is provided with a telescopic pipe body, the bottom of the lower pipeline is provided with a sleeve joint, and both ends of the upper pipeline are provided with steam through reserved grooves;

[0006] An annular inner bulge is provided near the top of the inner wall of the upper pipe, and a cover body is fixed to the top of the annular inner bulge by a fastening bolt. An external thread is provided on the periphery of the top of the upper pipe, and a second internal thread corresponding to the external thread is provided on the inner wall of the cover body. A first connecting plate and a second connecting plate are respectively provided near the lower pipe and the upper pipe, and the first connecting plate and the second connecting plate are fastened and connected by connecting bolts.

[0007] By adopting the above technical scheme, the first connecting plate and the second connecting plate are conveniently connected by connecting bolts, and the lower pipeline is capable of being telescopic by arranging a telescopic tube body on the lower pipeline, and the sleeve joint is sleeved on the outer side of the top end of the downhole pipeline. When it is necessary to clean the impurities accumulated on the inner side of the telescopic tube body, the cover body is separated from the annular inner protrusion by loosening the fastening bolts, and then the cover body is rotated by rotating the cover body through the cooperation of the external thread and the second internal thread, thereby opening the top opening of the upper pipeline, and the inner wall of the telescopic tube body can be cleaned through the inspection opening at the top of the upper pipeline. The casing head has a part for inspection that can be easily opened, and the part for inspection has a good stability effect when fixed.

[0008] Specifically, a first internal thread is provided on the inner wall of the sleeve joint near the bottom.

[0009] Specifically, flanges are provided at the ends of the steam passages, and a mounting hole is provided through one end of the flange near the edge.

[0010] Specifically, the number of the fastening bolts is specifically set to be multiple groups, and the multiple groups of fastening bolts are evenly distributed along the circumference of the center of the top of the cover body.

[0011] Specifically, a sealing ring is provided at the bottom of the second connection disk, a sealing groove is provided at the top of the first connection disk, and the bottom end of the sealing ring is located in the sealing groove.

[0012] By adopting the above technical solution, the sealing effect of the first connection disk and the second connection disk at the adjacent part after connection can be effectively improved through the cooperation between the sealing ring and the sealing groove.

[0013] Specifically, the lower pipe, the upper pipe and the telescopic tube body are all made of stainless steel.

[0014] By adopting the above technical solution, the upper pipeline and telescopic pipe body made of stainless steel material have good strength and corrosion resistance and a long service life during use.

[0015] Beneficial effects of the utility model:

[0016] (1) The telescopic thermal recovery casing head described in the utility model, when it is necessary to clean the accumulated impurities inside the telescopic tube body, the cover body is separated from the annular inner protrusion by loosening the fastening bolts, and then the cover body is rotated through the external thread and the second internal thread, so that the cover body can be rotated to open the top opening of the upper pipe. The inner wall of the telescopic tube body can be cleaned through the inspection opening at the top of the upper pipe. The casing head has a portion that can be easily opened for inspection, and the portion for inspection has a good stability effect when fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall structure after cutting of the utility model;

[0020] Figure 3 This is a detailed structural diagram of point A of the utility model.

[0021] In the figure: 1, lower pipe; 2, sleeve joint; 3, upper pipe; 4, first connecting plate; 5, second connecting plate; 6, connecting bolts; 7, fastening bolts; 8, cover body; 9, steam duct; 10, flange; 11, mounting hole; 12, sealing groove; 13, sealing ring; 14, first internal thread; 15, external thread; 16, annular inner protrusion; 17, telescopic tube body; 18, second internal thread. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0023] In order to make the casing head have a part that can be easily opened for maintenance, and the part for maintenance has a good stability effect when fixed, such as Figure 1-3 As shown, the telescopic thermal recovery casing head described in the utility model comprises a lower pipeline 1, a sleeve joint 2, an upper pipeline 3, a telescopic pipe body 17, a steam through pipe 9 and a flange 10. The lower pipeline 1 is provided with a telescopic pipe body 17, the bottom of the lower pipeline 1 is provided with a sleeve joint 2, and both ends of the upper pipeline 3 are provided with steam through pipes 9 through reserved grooves;

[0024] An annular inner convex block 16 is provided near the top of the inner wall of the upper pipe 3, and a cover body 8 is fixed to the top of the annular inner convex block 16 by a fastening bolt 7. An external thread 15 is provided on the periphery of the top of the upper pipe 3, and a second internal thread 18 corresponding to the external thread 15 is provided on the inner wall of the cover body 8. A first connecting plate 4 and a second connecting plate 5 are respectively provided near the lower pipe 1 and the upper pipe 3, and the first connecting plate 4 and the second connecting plate 5 are fastened and connected by a connecting bolt 6.

[0025] When in use, the first connecting plate 4 and the second connecting plate 5 are conveniently connected by connecting bolts 6. By arranging a telescopic tube body 17 on the lower pipe 1, the lower pipe 1 can be telescoped. The sleeve joint 2 is sleeved on the outer side of the top of the downhole pipe. When it is necessary to clean the accumulated impurities on the inner side of the telescopic tube body 17, the cover body 8 is separated from the annular inner protrusion 16 by loosening the fastening bolts 7. Then, by rotating the cover body 8, the outer thread 15 cooperates with the second inner thread 18, and the cover body 8 can be rotated to open the top opening of the upper pipe 3. The inner wall of the telescopic tube body 17 can be cleaned through the inspection opening at the top of the upper pipe 3. The casing head has a part that can be easily opened for inspection, and the part for inspection has a good stability effect when fixed.

[0026] In order to better fix the sleeve joint 2 on the top of the underground ventilation pipeline, for example, Figure 2 As shown, the utility model also includes that a first internal thread 14 is provided on the inner wall of the sleeve joint 2 near the bottom.

[0027] When in use, the first internal thread 14 facilitates the sleeve joint 2 to be threadedly fixed to the outer side of the top end of the underground ventilation pipe.

[0028] For example, Figure 1-2 As shown, the utility model also includes that the ends of the steam passage pipe 9 are provided with flanges 10, and one end of the flange 10 is penetrated by a mounting hole 11 near the edge.

[0029] When in use, the flange 10 is conveniently connected to the flange on the external steam pipe by passing the external bolts through the mounting holes 11.

[0030] In order to improve the stability of the cover 8 when it is fixed, for example, Figure 1-2 As shown, the utility model also includes that the number of the fastening bolts 7 is specifically set to multiple groups, and the multiple groups of fastening bolts 7 are evenly distributed along the circumference of the top center of the cover body 8.

[0031] When in use, the overall stability of the cover body 8 after being fixed can be effectively improved by using multiple sets of fastening bolts 7 .

[0032] In order to improve the sealing effect of the connection between the lower pipe 1 and the upper pipe 3, for example, Figure 2 As shown, the utility model also includes that a sealing ring 13 is provided at the bottom of the second connection plate 5 , a sealing groove 12 is opened at the top of the first connection plate 4 , and the bottom end of the sealing ring 13 is located in the sealing groove 12 .

[0033] When in use, the sealing ring 13 cooperates with the sealing groove 12 to effectively improve the sealing effect of the first connection plate 4 and the second connection plate 5 at the adjacent position after connection.

[0034] For example, Figure 1 As shown, the utility model also includes that the lower pipe 1, the upper pipe 3 and the telescopic tube body 17 are all made of stainless steel.

[0035] When in use, the upper pipeline 3 and the telescopic tube body 17 made of stainless steel have good strength and corrosion resistance, and have a long service life when in use.

[0036] When the utility model is in use, the first connection plate 4 and the second connection plate 5 are conveniently connected by connecting bolts 6, and the lower pipeline 1 is telescopic by arranging a telescopic tube body 17 on the lower pipeline 1, so that the lower pipeline 1 can be telescoped, and the sleeve joint 2 is sleeved on the outer side of the top of the underground pipeline, and the external bolts are passed through the mounting hole 11 to conveniently connect the flange 10 with the flange on the external steam pipeline. When the external whole enters the upper pipeline 3 through the steam pipe 9, it enters the underground pipeline through the lower pipeline 1 and the sleeve joint 2, thereby completing the heating of the underground mining layer;

[0037] When it is necessary to clean the accumulated impurities on the inner side of the telescopic tube body 17, the cover body 8 is separated from the annular inner protrusion 16 by loosening the fastening bolts 7, and then the cover body 8 is rotated through the external thread 15 and the second internal thread 18, so that the cover body 8 can be rotated, and then the top opening of the upper pipe 3 is opened, and the inner wall of the telescopic tube body 17 can be cleaned through the inspection opening at the top of the upper pipe 3. The present sleeve head has a portion that can be easily opened for inspection, and the portion for inspection has a good stability effect when fixed.

[0038] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions in the specification are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the protection required by the utility model. The scope of protection required by the utility model is defined by the attached claims and their equivalents.

Claims

1. A telescopic thermal recovery casing head, characterized in that: The invention comprises a lower pipe (1), a sleeve joint (2), an upper pipe (3), a telescopic pipe body (17), a steam passage pipe (9) and a flange (10); the lower pipe (1) is provided with a telescopic pipe body (17); the bottom of the lower pipe (1) is provided with a sleeve joint (2); and both ends of the upper pipe (3) are provided with steam passage pipes (9) through reserved grooves; An annular inner convex block (16) is provided on the inner wall of the upper pipe (3) near the top, and a cover body (8) is fixed to the top of the annular inner convex block (16) by a fastening bolt (7). An outer thread (15) is provided on the periphery of the top of the upper pipe (3), and a second inner thread (18) corresponding to the outer thread (15) is provided on the inner wall of the cover body (8). A first connecting plate (4) and a second connecting plate (5) are respectively provided near the lower pipe (1) and the upper pipe (3), and the first connecting plate (4) and the second connecting plate (5) are fastened and connected by a connecting bolt (6).

2. A telescopic thermal recovery casing head according to claim 1, characterized in that: A first internal thread (14) is provided on the inner wall of the sleeve joint (2) near the bottom.

3. The telescopic thermal recovery casing head according to claim 1, characterized in that: The ends of the steam passage pipe (9) are each provided with a flange (10), and a mounting hole (11) is provided through one end of the flange (10) near the edge.

4. The telescopic thermal recovery casing head according to claim 1, characterized in that: The number of the fastening bolts (7) is specifically set to be multiple groups, and the multiple groups of fastening bolts (7) are evenly distributed along the circumference of the top center of the cover body (8).

5. The telescopic thermal recovery casing head according to claim 1, characterized in that: A sealing ring (13) is provided at the bottom of the second connection plate (5), a sealing groove (12) is provided at the top of the first connection plate (4), and the bottom end of the sealing ring (13) is located in the sealing groove (12).

6. The telescopic thermal recovery casing head according to claim 1, characterized in that: The lower pipe (1), the upper pipe (3) and the telescopic tube body (17) are all made of stainless steel.

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