Washing pipe assembly

Abstract

The utility model relates to the technical field of drilling machine top drive structures, and provides a wash pipe assembly which comprises a wash pipe. The main shaft is provided with a mounting hole, and one end of the washing pipe is arranged in the mounting hole; and the elbow is arranged at the other end of the washing pipe in a sleeving manner. By means of the technical scheme, the problem that in the prior art, a washing pipe structure greatly affects the overall height, and consequently a drilling machine is not convenient to use in a specific environment is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling rig top drive structures, in particular to a flushing pipe assembly. Background Art

[0002] With the continuous development of drilling rig technology, drilling rigs are gradually miniaturized, especially vehicle-mounted drilling rigs, which are developing at the fastest speed. Most of the vehicle-mounted drilling rigs are equipped with a top drive structure. According to the traditional oil top drive design, the top drive structure usually includes a power component, a rotator, a flush pipe and a pulley block, etc., which respectively assume different responsibilities and jointly complete the drilling process. Although the traditional oil top drive design has the advantages of a higher safety factor and reduced labor intensity, there are still some disadvantages, such as: the equipment structure is complex and the structure is not compact enough. At the same time, since the top drive drilling rig is usually used in a specific environment, it is necessary to consider the height matching between it and the derrick, but its flush pipe structure greatly restricts the effective lifting height of the drilling rig. Utility Model Content

[0003] The utility model provides a flushing pipe assembly, which solves the problem that the flushing pipe structure in the top drive structure in the related art greatly affects the overall height, making it inconvenient to use the drilling rig in a specific environment.

[0004] The technical solution of the utility model is as follows:

[0005] A flushing pipe assembly, comprising:

[0006] Pipe flushing;

[0007] A main shaft, wherein the main shaft has a mounting hole, and one end of the punch tube extends into the mounting hole;

[0008] An elbow is sleeved on the other end of the flushing pipe.

[0009] As a further technical solution, the punch tube is coaxially arranged with the main shaft, and further comprises:

[0010] A sealing member is provided between the flushing tube and the main shaft.

[0011] As a further technical solution, the sealing member comprises:

[0012] A sealing box, wherein the sealing box is sleeved on one end of the punch tube, and an annular groove is formed between the inner wall of the sealing box and the outer wall of the punch tube;

[0013] A support ring, which is sleeved on one end of the punch pipe and located in the annular groove;

[0014] A first sealing ring is sleeved on one end of the flushing tube and is located in the annular groove. The first sealing ring abuts against the supporting ring.

[0015] As a further technical solution, it also includes:

[0016] A second sealing ring is sleeved on the outer wall of the sealing box and abuts against the inner wall of the main shaft.

[0017] As a further technical solution, it also includes:

[0018] A pressure ring is sleeved on one end of the punch tube, one end of the pressure ring is located in the ring groove, and the pressure ring abuts against the first sealing ring.

[0019] As a further technical solution, it also includes:

[0020] A clamping nut, wherein the clamping nut is threadedly disposed on the main shaft and is located at one end of the main shaft, and the punch pipe passes through the clamping nut;

[0021] A first retaining ring is arranged in the annular groove, and the first retaining ring is sleeved on the pressure ring and located in the mounting hole, and the sealing box abuts against the first retaining ring.

[0022] As a further technical solution, the elbow is a gooseneck elbow, the elbow has a mounting opening, the mounting opening is stepped, and further comprises:

[0023] A third sealing ring, through which the other end of the flushing pipe is arranged at the installation port;

[0024] A second retaining ring is arranged in the elbow and abuts against the other end of the flushing tube.

[0025] As a further technical solution, the elbow further comprises a cavity, a mud port and a disassembly port, wherein the mud port, the disassembly port and the installation port are all connected to the cavity, and the disassembly port faces the installation port, and further comprises:

[0026] A sealing cover and a fourth sealing ring, wherein the sealing cover is detachably arranged on the disassembly port, and the fourth sealing ring is arranged between the sealing cover and the elbow.

[0027] As a further technical solution, it also includes:

[0028] A top drive cover, the main shaft is rotatably arranged on the top drive cover, and one end of the main shaft passes through the top drive cover;

[0029] The bracket is detachably arranged on the top drive cover, the elbow is detachably arranged on the bracket, an area is formed between the top drive cover and the bracket, and the wash pipe and one end of the main shaft are both located in the area.

[0030] As a further technical solution, the bottom of the pressure ring and the first sealing ring both have annular grooves, the top of the first sealing ring and the support ring both have annular protrusions, the annular protrusion of the support ring is located in the annular groove of the first sealing ring, and the annular protrusion of the first sealing ring is located in the annular groove of the pressure ring.

[0031] The working principle and beneficial effects of the utility model are:

[0032] In the utility model, the height of the traditional top drive structure is relatively high because of the connection structure of the related components around the flush pipe. Specifically, the two ends of the flush pipe are respectively threadedly connected to the gooseneck elbow and the main shaft through nuts. The total length of the three is relatively long, resulting in the overall height of the top drive structure being unable to match the height of the derrick and the structure being not compact enough. In order to solve the above problems, a flush pipe assembly is designed.

[0033] The installation form of the flush pipe, main shaft and elbow has changed from the traditional threaded connection to one end of the flush pipe installed in the installation hole of the main shaft, and the elbow sleeve is installed on the other end of the flush pipe. In this way, the overall length of the flush pipe is less than the sum of the lengths of the three, and it does not affect the normal operation of the top drive structure. The driving oil inside can circulate normally and drive the drill rod to perform drilling operations. The new flush pipe structure greatly shortens the working height of the top drive. The design of the top drive to the derrick is more compact, and the transportation and installation are faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0035] Figure 1 This is a cross-sectional view of a flushing pipe assembly in the utility model;

[0036] Figure 2 For this utility model Figure 1 Enlarged view of part A in the middle;

[0037] Figure 3 For this utility model Figure 1 Enlarged view of middle part B;

[0038] Figure 4 This is a schematic diagram of the punch pipe and the sealing member in the utility model;

[0039] In the figure: 1. punching pipe, 2. main shaft, 201. mounting hole, 3. elbow, 301. mounting port, 302. cavity, 303. mud port, 304. disassembly port, 4. seal, 401. sealing box, 402. ring groove, 403. support ring, 404. first sealing ring, 5. second sealing ring, 6. pressure ring, 7. locking nut, 8. first retaining ring, 9. third sealing ring, 10. second retaining ring, 11. sealing cover, 12. fourth sealing ring, 13. top drive cover, 14. bracket, 15. area. DETAILED DESCRIPTION

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0041] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0042] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0043] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] Reference Figure 1~Figure 4 , which is the first embodiment of the utility model, proposes a flushing pipe assembly, including: a flushing pipe 1; a main shaft 2, the main shaft 2 has a mounting hole 201, one end of the flushing pipe 1 extends into the mounting hole 201; an elbow 3, the elbow 3 is sleeved on the other end of the flushing pipe 1.

[0045] In this embodiment, the height of the traditional top drive structure is relatively high because of the connection structure of the related components around the flushing pipe 1. Specifically, the two ends of the flushing pipe 1 are threadedly connected to the gooseneck elbow 3 and the main shaft 2 through nuts. The total length of the three is relatively long, resulting in the overall height of the top drive structure being unable to match the height of the derrick and the structure being not compact enough. In order to solve the above problems, a flushing pipe assembly is designed.

[0046] The installation form of the flush pipe 1, the main shaft 2 and the elbow 3 is changed from the traditional sequential threaded connection to one end of the flush pipe 1 being installed in the installation hole 201 of the main shaft 2, that is, most of the height of the flush pipe 1 extends into the main shaft 2, and the elbow 3 is sleeved on the other end of the flush pipe 1. In this way, the overall length of the flush pipe is less than the sum of the lengths of the three, and does not affect the normal operation of the top drive structure. The driving oil in it can circulate normally and drive the drill rod to perform drilling operations. The new flush pipe 1 structure greatly shortens the working height of the top drive. The design of the top drive to the derrick is more compact, and the transportation and installation are faster.

[0047] Further, the punch tube 1 is coaxially arranged with the main shaft 2, and further comprises: a sealing member 4, wherein a sealing member 4 is arranged between the punch tube 1 and the main shaft 2. Further, the sealing member 4 comprises: a sealing box 401, wherein the sealing box 401 is sleeved on one end of the punch tube 1, and an annular groove 402 is formed between the inner wall of the sealing box 401 and the outer wall of the punch tube 1; a supporting ring 403, wherein the supporting ring 403 is sleeved on one end of the punch tube 1 and is located in the annular groove 402; and a first sealing ring 404, wherein the first sealing ring 404 is sleeved on one end of the punch tube 1 and is located in the annular groove 402, and the first sealing ring 404 abuts against the supporting ring 403.

[0048] In this embodiment, since the driving oil needs to be circulated inside the flushing tube assembly, the overall sealing performance must be ensured. Under the premise that one end of the flushing tube 1 is installed inside the main shaft 2, it is even more necessary to ensure good sealing. Therefore, the sealing member 4 at one end of the flushing tube 1 in the mounting hole 201 includes a sealing box 401, a support ring 403 and a first sealing ring 404. The sealing box 401 is mounted on one end of the flushing tube 1, and the gap between the inner wall and the outer wall of the flushing tube 1 forms an annular groove 402, which is connected to the mounting hole 201 of the main shaft 2, and the support ring 403 is close to one end of the flushing tube 1. , fixed inside the annular groove 402, plays a role in firmly supporting and positioning the first sealing ring 404. At the same time, the first sealing ring 404 is also accurately placed in the annular groove 402, and provides excellent sealing effect through its own elastic deformation, ensuring that the sealing performance between the punching tube 1 and the main shaft 2 reaches the optimal level. This design not only improves the sealing and durability of the overall structure, but also simplifies the assembly and maintenance process and improves practicality. Several first sealing rings 404 can be installed in sequence along the length direction of the punching tube 1 to meet the sealing requirements.

[0049] At the same time, the punching tube 1 and the main shaft 2 are coaxially arranged to ensure a high degree of concentricity and matching accuracy between the two.

[0050] Furthermore, it also includes: a second sealing ring 5, which is sleeved on the outer wall of the sealing box 401 and abuts against the inner wall of the main shaft 2. In this embodiment, in order to improve the sealing performance of the sealing box 401 in the mounting hole 201 and prevent the leakage of the flowing medium therein, the second sealing ring 5 is sleeved on the outer wall of the sealing box 401, and the second sealing ring 5 abuts against the inner wall of the main shaft 2.

[0051] Furthermore, it also includes: a pressure ring 6 , which is sleeved on one end of the punching tube 1 , one end of the pressure ring 6 is located in the ring groove 402 , and the pressure ring 6 abuts against the first sealing ring 404 .

[0052] Furthermore, it also includes: a clamping nut 7, which is threaded on the main shaft 2 and located at one end of the main shaft 2, and the punch tube 1 passes through the clamping nut 7; a first retaining ring 8, which is arranged in an annular groove, and the first retaining ring 8 is sleeved on the pressure ring 6 and located in the mounting hole 201, and the sealing box 401 abuts against the first retaining ring 8.

[0053] In this embodiment, the installation of components such as a pressure ring 6 and a clamping nut 7 not only strengthens the connection strength between the flushing tube 1 and the sealing member 4, but also ensures the long-lasting and stable sealing effect by directly applying pressure to the first sealing ring 404, effectively preventing the leakage of the medium in the flushing tube 1, improving the sealing performance and safety of the overall structure, avoiding axial movement under high pressure, and ensuring that the entire flushing tube assembly can maintain a stable and reliable operating state under extreme working conditions. Specifically, the pressure ring 6 is first sleeved on one end of the flushing tube 1 and abuts against the first sealing ring 404, and a clamping nut 7 is threaded on the end of the main shaft 2 to further compress the pressure ring 6, and at the same time, a first retaining ring 8 is arranged outside the pressure ring 6 to make the sealing box 401 and the inner wall of the main shaft 2 abut against it.

[0054] Furthermore, the elbow 3 is a gooseneck elbow, and the elbow 3 has an installation opening 301, which is stepped and also includes: a third sealing ring 9, and the other end of the flushing pipe 1 is arranged at the installation opening 301 through the third sealing ring 9; a second retaining ring 10, and the second retaining ring 10 is arranged in the elbow 3 and abuts against the other end of the flushing pipe 1.

[0055] In this embodiment, in order to improve the sealing performance of the elbow 3 sleeved on the other end of the flushing pipe 1, it is limited to be installed at the installation port 301 of the gooseneck elbow 3 through the third sealing ring 9, and the stable flow of the medium can be ensured. A second retaining ring 10 is further installed at the end of the flushing pipe 1 to block its axial movement. The elbow 3 provides an installation position and plays a limiting role.

[0056] Furthermore, the elbow 3 also has a cavity 302, a mud port 303 and a disassembly port 304. The mud port 303, the disassembly port 304 and the installation port 301 are all connected to the cavity 302, and the disassembly port 304 faces the installation port 301. It also includes: a sealing cover 11 and a fourth sealing ring 12. The sealing cover 11 is detachably arranged on the disassembly port 304, and a fourth sealing ring 12 is arranged between the sealing cover 11 and the elbow 3.

[0057] In this embodiment, the gooseneck elbow 3 has several openings and a cavity 302. Specifically, the mud port 303, the disassembly port 304 and the installation port 301 are all connected to the cavity 302. Oil comes from the mud port 303 and flows to the inside of the flushing pipe 1 and the main shaft 2. The disassembly port 304 is detachably provided with a sealing cover 11 through bolts and a fourth sealing ring 12 to ensure sealing performance. The disassembly port 304 faces the installation port 301 so that the sealing cover 11 can be opened to install the flushing pipe 1 to the upper end of the main shaft 2, that is, the position of the installation port 301, from the elbow 3. When the seal 4 needs to be replaced, the sealing cover 11 at the upper end of the elbow 3 can be removed, the flushing pipe 1 is first taken out of the elbow 3, and then the sealing ring, the pressure ring 6 or the sealing box 401 is taken out. The main shaft 2 and the top drive cover 13 are sealed with a seal 4 such as an oil seal.

[0058] Furthermore, it also includes: a top drive cover 13, the main shaft 2 is rotatably set on the top drive cover 13, and one end of the main shaft 2 passes through the top drive cover 13; a bracket 14, the bracket 14 is detachably set on the top drive cover 13, the elbow 3 is detachably set on the bracket 14, and an area 15 is formed between the top drive cover 13 and the bracket 14, and the punch pipe 1 and one end of the main shaft 2 are both located in the area 15.

[0059] In this embodiment, the connection between the entire flushing pipe assembly and the top drive structure is completed through the top drive upper cover 13 and the bracket 14, that is, the main shaft 2 is arranged on the top drive upper cover 13, and one end thereof passes through the top drive upper cover 13. The bracket 14 is detachably arranged on the top drive upper cover 13 by bolts to provide stable support for the elbow 3. At the same time, the flushing pipe 1 and one end of the main shaft 2 are both located in the area between the top drive upper cover 13 and the bracket 14, which plays a certain protective role and is also convenient for overall disassembly and maintenance.

[0060] Furthermore, the bottom of the pressure ring and the first sealing ring both have annular grooves, the top of the first sealing ring and the support ring both have annular protrusions, the annular protrusion of the support ring is located in the annular groove of the first sealing ring, and the annular protrusion of the first sealing ring is located in the annular groove of the pressure ring.

[0061] In this embodiment, a special form of sequential connection is further defined to improve the overall sealing performance and facilitate centering and installation by workers. The annular protrusion and the annular groove are clamped together to clamp the annular protrusion of the support ring in the annular groove of the first sealing ring, and the annular protrusion of the first sealing ring is clamped in the annular groove of the pressure ring.

[0062] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A flushing pipe assembly, characterized in that: include: Flushing pipe (1); A main shaft (2), the main shaft (2) having a mounting hole (201), one end of the punch tube (1) extending into the mounting hole (201); An elbow (3), wherein the elbow (3) is sleeved on the other end of the flushing pipe (1).

2. A flushing pipe assembly according to claim 1, characterized in that: The flushing tube (1) is coaxially arranged with the main shaft (2), and further comprises: A sealing member (4), wherein the sealing member (4) is arranged between the punch tube (1) and the main shaft (2).

3. A flushing pipe assembly according to claim 2, characterized in that: The sealing element (4) comprises: A sealing box (401), the sealing box (401) being sleeved on one end of the punching tube (1), an annular groove (402) being formed between the inner wall of the sealing box (401) and the outer wall of the punching tube (1); A support ring (403), the support ring (403) being sleeved on one end of the punching tube (1) and located in the annular groove (402); A first sealing ring (404), the first sealing ring (404) is sleeved on one end of the flushing tube (1) and is located in the annular groove (402), the first sealing ring (404) abutting against the supporting ring (403).

4. A flushing pipe assembly according to claim 3, characterized in that: Also includes: A second sealing ring (5), the second sealing ring (5) is sleeved on the outer wall of the sealing box (401) and abuts against the inner wall of the main shaft (2).

5. The flushing pipe assembly according to claim 3, characterized in that: Also includes: A pressure ring (6), the pressure ring (6) being sleeved on one end of the punching tube (1), one end of the pressure ring (6) being located in the annular groove (402), and the pressure ring (6) abutting against the first sealing ring (404).

6. A flushing pipe assembly according to claim 5, characterized in that: The main shaft (2) has an annular groove and further comprises: A clamping nut (7), wherein the clamping nut (7) is threadedly arranged on the main shaft (2) and is located at one end of the main shaft (2), and the punch tube (1) passes through the clamping nut (7); A first retaining ring (8), the first retaining ring (8) is arranged in the annular groove, and the first retaining ring (8) is sleeved on the pressure ring (6) and is located in the mounting hole (201), and the sealing box (401) abuts against the first retaining ring (8).

7. The flushing pipe assembly according to claim 1, characterized in that: The elbow (3) is a gooseneck elbow, the elbow (3) has a mounting opening (301), the mounting opening (301) is stepped, and further comprises: A third sealing ring (9), wherein the other end of the flushing tube (1) is arranged at the installation opening (301) through the third sealing ring (9); A second retaining ring (10), the second retaining ring (10) is arranged in the elbow (3) and abuts against the other end of the flushing tube (1).

8. A flushing pipe assembly according to claim 7, characterized in that: The elbow (3) further comprises a cavity (302), a mud port (303) and a disassembly port (304), wherein the mud port (303), the disassembly port (304) and the installation port (301) are all connected to the cavity (302), and the disassembly port (304) faces the installation port (301), and further comprises: A sealing cover (11) and a fourth sealing ring (12), wherein the sealing cover (11) is detachably arranged on the disassembly opening (304), and the fourth sealing ring (12) is arranged between the sealing cover (11) and the elbow (3).

9. The flushing pipe assembly according to claim 1, characterized in that: Also includes: A top drive upper cover (13), the main shaft (2) being rotatably disposed on the top drive upper cover (13), and one end of the main shaft (2) passing through the top drive upper cover (13); A bracket (14), wherein the bracket (14) is detachably arranged on the top drive cover (13), the elbow (3) is detachably arranged on the bracket (14), an area (15) is formed between the top drive cover (13) and the bracket (14), and the punch pipe (1) and one end of the main shaft (2) are both located in the area (15).

10. The flushing pipe assembly according to claim 5, characterized in that: The bottoms of the pressure ring (6) and the first sealing ring (404) are both provided with an annular groove, and the tops of the first sealing ring (404) and the support ring (403) are both provided with an annular protrusion, the annular protrusion of the support ring (403) is located in the annular groove of the first sealing ring (404), and the annular protrusion of the first sealing ring (404) is located in the annular groove of the pressure ring (6).

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