Elbow structure capable of prolonging service life and rapidly replacing easily-eroded blind plate

Abstract

The utility model discloses an elbow structure capable of prolonging the service life and quickly replacing an easily-eroded blind plate, which belongs to the field of oil-gas field development and exploitation engineering, and comprises a three-way pipe, and two adjacent heads are respectively connected with an external conveying pipeline; the flange is communicated with the other head part of the three-way pipe; the flange cover is detachably connected to the flange and keeps sealing; one end of the flange cover penetrates through the flange and extends into the three-way pipe to facilitate flow guiding. According to the elbow structure, the three-way pipe, the flange and the flange cover are arranged, so that the situation that the follow-up service life is affected after the elbow is thinned due to abrasion caused by the fact that an internal bent part is scoured by sand grains in flowing sand-containing natural gas can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of oil and gas field development and exploitation, in particular to an elbow structure capable of extending the service life and quickly replacing an easily eroded blind plate. Background Art

[0002] Since production testing is required before natural gas wells are exploited, the wellhead media is sand-containing natural gas, oil, and water. During the test, the wellhead pressure is high and the medium flow rate is fast. The sand particles seriously erode the elbows at the turning position of the inlet pipeline of the downstream three-phase test separation device. The thickness of the elbows decreases rapidly, seriously affecting the service life of the device.

[0003] When the effective thickness of the elbow does not meet the use requirements, the conventional treatment method is to remove the entire pipeline and return it to the factory to cut the eroded elbow and re-weld a new elbow. This method has a long construction period and high cost. After the pipeline is cut multiple times, the straight length of the pipeline may be shortened. After welding the new elbow, the size of the entire pipeline changes significantly, affecting the reinstallation of the pipeline, and thus will seriously affect the normal operation of the entire device. Utility Model Content

[0004] Therefore, in order to solve the above-mentioned deficiencies, the utility model provides an elbow structure which can extend the service life and quickly replace the easily eroded blind plate. The elbow structure changes the welded elbow at the turning position of the pipeline into a combination structure of a tee pipe, a flange and a flange cover. A filling part inserted into the tee pipe is provided on the flange cover, and the flange cover can be directly replaced after wear through the filling part, thereby avoiding the problem of subsequent changes in pipeline size when cutting the pipeline and possible poor sealing after installation. In addition, a guide part is provided at the end of the filling part to facilitate the flow of the medium in the tee pipe and reduce noise.

[0005] The utility model is realized by constructing an elbow structure which can prolong the service life and quickly replace the blind plate which is easy to be eroded, comprising a three-way pipe, two adjacent heads are respectively connected to the external conveying pipeline;

[0006] The flange is connected with the other end of the tee pipe;

[0007] Flange cover, which is detachably connected to the flange and maintains sealing;

[0008] One end of the flange cover passes through the flange and extends into the tee pipe for flow diversion.

[0009] Specifically, a conical transition portion A is provided at one end of the flange, the end of the conical transition portion A is fixed on the head of the tee pipe to maintain communication, and a slot A is provided on the outer side of the other end of the flange.

[0010] Specifically, a conical transition portion B inserted into the conical transition portion A is provided on the connecting end of the flange cover and the flange, and a filling portion inserted into the interior of the tee is also provided at the end of the conical transition portion B, and a guide portion for guiding the adjacent heads at the inner end of the tee is provided at the end of the filling portion.

[0011] Specifically, the outer diameter of the filling portion corresponds to the inner diameter of the tee pipe, and when the flange cover is connected to the flange, the guide portion at the end of the filling portion is located between two adjacent heads of the tee pipe.

[0012] Specifically, the guide portion is a conical surface opened on the outer side of the end of the filling portion, and the conical surface is directly opposite to between two adjacent heads of the three-way pipe.

[0013] Specifically, a groove B is provided on the outer side of the connection end between the flange cover and the flange, and a sealing ring is sleeved between the groove A and the groove B.

[0014] The utility model has the following beneficial effects:

[0015] The elbow structure changes the welded elbow at the turning position of the pipeline into a combined structure of a tee pipe, a flange and a flange cover. A filling part inserted into the tee pipe is provided on the flange cover. The filling part contacts with sand particles, and the flange cover can be directly replaced when worn, thereby avoiding the problem of subsequent changes in pipeline size when cutting the pipeline and possible poor sealing after installation. In addition, a guide part is provided at the end of the filling part to facilitate the flow of the medium in the tee pipe and reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the specific implementation of the present invention, they are used to explain the present invention, but do not constitute any limitation to the present invention. In the accompanying drawings:

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 It is a structural schematic diagram of the three-way pipe and the flange in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the flange cover in the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the utility model connected with a pipeline;

[0022] Figure 6 It is a structural schematic diagram of the utility model when it is applied to a test separation device;

[0023] In the figure: 1. tee; 2. flange; 2.1. slot A; 2.2. conical transition part A; 3. flange cover; 3.1. slot B; 3.2. conical transition part B; 3.3. filling part; 3.4. flow guide part; 4. connecting bolt; 5. connecting nut; 6. sealing ring; 7. pipeline; 8. pipeline gate valve; 9. three-phase test separator; 10. skid seat. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further specifically described below through specific embodiments in combination with the accompanying drawings; it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention in any way; the accompanying drawings in the present invention are only used to assist in the description of the embodiments and to facilitate understanding, and are not intended to limit the present invention in any way.

[0025] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0026] As described in the background technology, when the existing elbow structure transports freshly extracted natural gas, since the natural gas contains sand, oil, water, etc., the sand contained in the natural gas is easily in contact with the elbow during high-pressure transportation at the elbow position, causing wear and tear, resulting in thinning of the elbow structure. The existing treatment method is to cut the worn elbow and then weld other elbows. Multiple cutting will cause changes in the pipeline size, affecting the reinstallation of the pipeline. At the same time, welding the elbow may cause the sealing to deteriorate, and the stability is not very good.

[0027] For the reasons stated above, please refer to the attached Figure 1 and attached Figure 2 The utility model provides an elbow structure that can extend the service life and quickly replace the easily eroded blind plate, including a three-way pipe 1, and two adjacent heads are respectively connected to the external delivery pipeline;

[0028] The flange 2 is connected to the other end of the tee pipe 1;

[0029] A flange cover 3 is detachably connected to the flange 2 and maintains sealing;

[0030] One end of the flange cover 3 passes through the flange 2 and extends into the tee pipe 1 for flow diversion.

[0031] Please see attached Figure 3Specifically, a conical transition portion A2.2 is provided at one end of the flange 2, the end of the conical transition portion A2.2 is fixed on the head of the tee pipe 1 to maintain communication, and a slot A2.1 is provided on the outer side of the other end of the flange 2.

[0032] Referring to the technical features described in the previous paragraph, the conical transition portion of the flange is provided to facilitate connection with the end of the tee pipe, and the groove is provided to facilitate installation of a sealing ring in the groove, so as to facilitate sealing connection after connection with the flange cover.

[0033] Please refer to the attached Figure 4 Specifically, a conical transition portion B3.2 inserted into the conical transition portion A2.2 is provided on the connecting end of the flange cover 3 and the flange 2, and a filling portion 3.3 inserted into the interior of the tee pipe 1 is also provided at the end of the conical transition portion B3.2, and a guide portion 3.4 for guiding the adjacent heads at the inner end of the tee pipe 1 is provided at the end of the filling portion 3.3.

[0034] Specifically, the outer diameter of the filling portion 3.3 corresponds to the inner diameter of the tee pipe 1 , and when the flange cover 3 is connected to the flange 2 , the guide portion 3.4 at the end of the filling portion 3.3 is located between two adjacent heads of the tee pipe 1 .

[0035] Combined with Figure 2 and attached Figure 4 It can be seen that, specifically, the guide portion 3.4 is a conical surface opened on the outer side of the end of the filling portion 3.3, and the conical surface is directly opposite to between two adjacent heads of the tee pipe 1.

[0036] With reference to the technical features described in the above paragraphs, the filling part and the guide part of the flange cover are provided to facilitate the guidance of the medium flowing inside after the three-way pipe is inserted, which can reduce the wear on the filling part and also reduce the noise.

[0037] Please refer to the attached Figure 5 Specifically, a groove B3.1 is provided on the outer side of the connection end between the flange cover 3 and the flange 2, and a sealing ring 6 is sleeved between the groove A2.1 and the groove B3.1.

[0038] With reference to the technical features described in the previous paragraph, the sealing ring can be installed by setting grooves on the flange and the flange cover, thereby sealing the fitting surfaces of the flange and the flange cover.

[0039] Specifically, the number of connecting holes between the flange cover 3 and the flange 2 can be 4 or 6, and the guide part 3.4 is opened in the corresponding direction of any connecting hole, so as to facilitate the installation direction of the guide part 3.4 after connection, and ensure that the conical surface of the guide part 3.4 is directly opposite to the two adjacent heads of the tee pipe 1, and can be fixed by the connecting bolts 4 and the connecting nuts 5 during connection.

[0040] When installing the elbow structure, the two adjacent heads (i.e., heads perpendicular to each other) of the tee pipe 1 are sealed and firmly connected to the pipe 7 in advance (such as welding), and then the flange 2 is welded to the other head of the tee pipe 1. During welding, any connecting hole is kept at the same horizontal line with the pipe 7 connected to the tee pipe. After completion, a sealing ring 6 is put on the outer end of the slot B3.1 of the flange cover 3, and then the guide part 3.4 and the filling part 3.3 are inserted into the tee pipe 1 from the open end of the flange 2 (during insertion, the guide part 3.4 is kept directly opposite to the two pipe openings in the tee pipe 1). Since any connecting hole on the flange 2 is kept at the same horizontal line with the pipe 7 connected to the tee pipe, the guide part 3.4 will not deflect after the flange 2 and the flange cover 3 are connected by the connecting bolts 4 and the connecting nuts 5, thereby achieving the purpose of diversion. The tightening of the connecting bolts 4 and the connecting nuts 5 fixes the sealing ring 6 between the flange 2 and the flange cover 3 to achieve sealing.

[0041] After the elbow structure is installed on the pipeline 7, its use process can be referred to the attached Figure 6 , by attaching Figure 6 It can be seen that by opening the pipeline gate valve 8 on the pipeline 7, the sand-containing natural gas medium flows in the pipeline 7, and when it reaches the elbow structure, it is guided to another vertical pipeline through the guide part 3.4, and finally flows into the three-phase test separator 9 on the skid seat 10 for separation.

[0042] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. An elbow structure that can extend the service life and quickly replace the easily eroded blind plate, characterized by: include A tee pipe, two adjacent heads are respectively connected to external delivery pipelines; The flange is connected with the other end of the tee pipe; Flange cover, which is detachably connected to the flange and maintains sealing; One end of the flange cover passes through the flange and extends into the tee pipe for flow diversion.

2. According to claim 1, an elbow structure capable of extending service life and quickly replacing easily eroded blind plates is characterized by: A conical transition portion A is provided at one end of the flange, the end of the conical transition portion A is fixed on the head of the tee pipe to maintain communication, and a clamping groove A is provided on the outer side of the other end of the flange.

3. According to claim 2, an elbow structure capable of extending service life and quickly replacing easily eroded blind plates is characterized in that: A conical transition portion B inserted into the conical transition portion A is provided on the connecting end of the flange cover and the flange, and a filling portion inserted into the interior of the tee is also provided at the end of the conical transition portion B, and a guide portion for guiding the adjacent heads at the inner end of the tee is provided at the end of the filling portion.

4. According to claim 3, an elbow structure capable of extending service life and quickly replacing easily eroded blind plates is characterized in that: The outer diameter of the filling part corresponds to the inner diameter of the tee pipe. When the flange cover is connected to the flange, the flow guide part at the end of the filling part is located between two adjacent heads of the tee pipe.

5. According to claim 3, an elbow structure capable of extending service life and quickly replacing easily eroded blind plates is characterized in that: The guide portion is a conical surface opened on the outer side of the end of the filling portion, and the conical surface is directly opposite to between two adjacent heads of the three-way pipe.

6. According to claim 2, an elbow structure capable of extending service life and quickly replacing easily eroded blind plates is characterized by: A clamping groove B is also provided on the outer side of the connection end between the flange cover and the flange, and a sealing ring is sleeved between the clamping groove A and the clamping groove B.

Images