CN219220338U - Air pipe for gas lift reverse circulation drill pipe - Google Patents
Air pipe for gas lift reverse circulation drill pipe Download PDFInfo
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- CN219220338U CN219220338U CN202320456002.6U CN202320456002U CN219220338U CN 219220338 U CN219220338 U CN 219220338U CN 202320456002 U CN202320456002 U CN 202320456002U CN 219220338 U CN219220338 U CN 219220338U
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Abstract
The utility model provides an air pipe for a gas lift reverse circulation drill rod, which comprises a straight pipe section, a bent pipe section and a connecting assembly, wherein the bent pipe section is positioned at two ends of the straight pipe section, at least one end part of the straight pipe section is connected with the bent pipe section through the connecting assembly, the connecting straight pipe is positioned between the straight pipe section and the bent pipe section and provided with a gap, one end part of a connecting pipe sleeve in the connecting assembly is sleeved on the connecting straight pipe section in a sliding manner and is in sealing connection with the connecting straight pipe section, the other end part of the connecting pipe sleeve is fixedly sleeved on the straight pipe section or the bent pipe section and is in sealing connection with the straight pipe section, the air tightness can be ensured by utilizing the gap and the relative sliding of the connecting pipe sleeve and the connecting straight pipe, the influence caused by the elastic deformation of a drill rod is eliminated, and the air pipe and the drill rod can be formed into a true whole through inserting the end part of the bent pipe section into a connecting hole on a flange of the drill rod, so that the air pipe is convenient to detach and connect.
Description
Technical Field
The utility model relates to the technical field of drilling, in particular to an air pipe for a gas lift reverse circulation drill rod.
Background
Reverse circulation drilling is a drilling technology of a reverse circulation mode in which drilling flushing fluid descends from a drill rod to a hole wall, returns to the ground surface from the drill rod after reaching the bottom of the hole, and can be divided into three types according to the power and the mode of forming reverse circulation liquid flow ascending in the drill rod: compared with other two drilling types, the gas lift (air) reverse circulation drilling has the advantages of strong rock debris removal capability, difficult blockage, small equipment abrasion, long service life of a drill bit, high drilling efficiency and the like, and is widely applied to shaft construction with large diameter and large depth.
The gas lift reverse circulation drill rod is a core component of reverse circulation drilling and is roughly divided into two types of double-wall drill rods or single-wall drill rods, for the double-wall drill rods, the cavity of the inner pipe is used as a slurry discharging channel, the cavity between the inner pipe and the outer pipe is used as an air pipe for conveying compressed air, and although gas-liquid conveying and gas-liquid mixing can be well realized, the air pipe is complex in structure, high in manufacturing difficulty and high in cost; for a single-wall drill rod, the inner cavity is only used as a pulp discharging channel, an independent air pipe is required to be additionally arranged for conveying compressed air, and when the air pipe is arranged in the drill rod, a part of pulp discharging channel is occupied, a certain blocking is formed for pulp discharging, and the pulp discharging effect is poor; when the air pipe is arranged outside the drill pipe, although the slurry discharging effect is not affected, in order to ensure the air tightness and avoid the influence of the elastic deformation of the drill pipe, the air pipe is difficult to be made into a whole with the drill pipe, and the assembly and the disassembly are very inconvenient.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides the air pipe for the gas lift reverse circulation drill rod, which has the advantages of simple structure, small manufacturing difficulty, low cost, good slurry discharging effect and convenience in disassembly and connection.
In order to achieve the purpose, the technical scheme adopted by the utility model is that the air pipe for the gas lift reverse circulation drill rod comprises a straight pipe section, bent pipe sections positioned at two ends of the straight pipe section and a connecting assembly;
at least one end part of the straight pipe section is connected with the bent pipe section through the connecting assembly, the connecting assembly comprises a connecting straight pipe and a connecting pipe sleeve, the connecting straight pipe is positioned between the straight pipe section and the bent pipe section, a gap is reserved between the connecting straight pipe and the adjacent straight pipe section and/or the bent pipe section, one end part of the connecting pipe sleeve is slidably sleeved on the connecting straight pipe and is in sealing connection with the connecting straight pipe section, and the other end part of the connecting pipe sleeve is fixedly sleeved on the straight pipe section or the bent pipe section and is in sealing connection with the connecting straight pipe section or the bent pipe section; the end part of the bent pipe section, which is far away from the straight pipe section, is inserted into a communication hole on the drill rod flange and is in sealing connection with the hole wall of the communication hole.
Preferably, the outer wall of the connecting straight pipe is provided with a first annular groove, and a first O-shaped sealing ring used for sealing the outer wall of the connecting straight pipe and the inner wall of the connecting pipe sleeve is arranged in the first annular groove.
Further preferably, the first annular groove has a plurality of channels and is symmetrically distributed at two ends of the connecting straight pipe.
Preferably, the connecting pipe sleeve is provided with a first lug plate extending along the radial direction of the connecting straight pipe, the end part of the straight pipe section, which faces the connecting pipe sleeve, is provided with a second lug plate parallel to the first lug plate, and the first lug plate and the second lug plate adjacent to the first lug plate are locked by bolts.
Preferably, the straight pipe section comprises a straight pipe body and a first pipe sleeve seat connected with the straight pipe body towards the end part of the connecting straight pipe, the wall thickness of the first pipe sleeve seat is larger than that of the straight pipe body, a first bearing platform used for propping against the end face of the connecting pipe sleeve and a second annular groove used for placing a second O-shaped sealing ring are arranged on the outer wall of the first pipe sleeve seat, and the second annular groove is located on one side of the first bearing platform towards the connecting straight pipe.
Further preferably, the first pipe socket is inserted into the end part of the straight pipe body and is in welded connection with the end part of the straight pipe body, and the outer wall of the first pipe socket is provided with a first positioning spigot for inserting and positioning and a first conical transition surface convenient for welding.
Preferably, the bent pipe section comprises a bent pipe body and a second pipe sleeve seat connected with the bent pipe body towards the end part of the connecting straight pipe, the wall thickness of the second pipe sleeve seat is larger than that of the bent pipe body, a second bearing platform used for propping against the end face of the connecting pipe sleeve and a third annular groove used for placing a third O-shaped sealing ring are arranged on the outer wall of the second pipe sleeve seat, and the third annular groove is located on one side of the second bearing platform towards the connecting straight pipe.
Further preferably, the second pipe socket is inserted into the end part of the elbow body and is welded with the end part of the elbow body, and the outer wall of the second pipe socket is provided with a second positioning spigot for insertion positioning and a second conical transition surface convenient for welding.
Preferably, an end of the bent pipe section is slidably inserted in the communication hole.
Further preferably, the hoop is arranged on the straight pipe section, and the straight pipe section is connected with the drill rod through the hoop.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. through making at least one tip of straight tube section be connected with the curved tube section through coupling assembling, make coupling assembling's connection straight tube be located between straight tube section and the curved tube section and have the clearance with it, make coupling assembling connect one end slip cap of pipe box establish on connecting straight tube and sealing connection with it, make the fixed cover of another tip of connecting the pipe box establish on straight tube section or curved tube section and sealing connection with it, can utilize the sealing connection of connecting pipe box both ends, ensure the gas tightness, can utilize above-mentioned clearance and the relative slip of coupling box and connection straight tube again, eliminate the influence that drilling rod elastic deformation brought, realize the bulk connection of tuber pipe and drilling rod, and a structure is simple, the manufacturing degree of difficulty is little, with low costs, it is effectual to arrange thick liquid.
2. Through making the bend keep away from the tip of straight pipe section and insert and establish in the intercommunicating pore on the drilling rod flange and with the pore wall sealing connection of intercommunicating pore, when tearing open and connect, can utilize the butt joint of intercommunicating pore on the adjacent drilling rod flange to realize the intercommunication between the adjacent tuber pipe, make tuber pipe and drilling rod become a real whole piece, it is more convenient to tear open and connect.
Drawings
Fig. 1 is a partial schematic front view of a preferred embodiment of the present utility model after connection to a drill pipe.
Fig. 2 is a left-hand schematic view of fig. 1.
Fig. 3 is a schematic top view of fig. 1.
Fig. 4 is a perspective view of fig. 1.
Fig. 5 is a schematic cross-sectional view in the direction A-A of fig. 3.
Fig. 6 is a partially enlarged schematic view at B in fig. 5.
Fig. 7 is a partially enlarged schematic view at C in fig. 5.
Wherein: 10. a straight pipe section; 11. a straight pipe body; 12. a first socket; 121. a first bearing platform; 122. a second annular groove; 123. a second O-ring seal; 124. a first positioning spigot; 125. a first tapered transition surface; 13. a hoop; 20a, upper bend section; 20b, lower bend section; 21. a bent pipe body; 22. a second socket; 221. the second bearing platform; 222. a third annular groove; 223. a third O-ring seal; 224. a second locating spigot; 225. a second conical transition surface; 30. a connection assembly; 31. connecting a straight pipe; 311. a first annular groove; 312. a first O-ring seal; 32. a connecting pipe sleeve; 321. a first ear plate; 322. a second ear plate; 323. a bolt; 33. a gap; 40. a drill rod; 41. a drill pipe flange; 42. the communication hole.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model will be more readily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
As shown in fig. 1 to 7, the air duct for a gas lift reverse circulation drill rod provided by the utility model comprises a straight pipe section 10, an upper bent pipe section 20a positioned at the upper end of the straight pipe section 10, a lower bent pipe section 20b positioned at the lower end of the straight pipe section 10, and a connecting assembly 30; the upper end of the straight pipe section 10 is welded with the upper curved pipe section 20a, the lower end of the straight pipe section 10 is connected with the lower curved pipe section 20b through a connecting component 30, the connecting component 30 comprises a connecting straight pipe 31 and a connecting pipe sleeve 32, the connecting straight pipe 31 is positioned between the straight pipe section 10 and the lower curved pipe section 20b, a gap 33 is reserved between the upper end of the connecting straight pipe 31 and the lower end of the straight pipe section 10, the lower end of the connecting straight pipe 31 abuts against the upper end of the lower curved pipe section 20b, the connecting pipe sleeve 32 is arranged at intervals up and down, the upper end of the connecting pipe sleeve 32 positioned above is fixedly sleeved on the lower end of the straight pipe section 10 and is in sealing connection with the straight pipe section 10, the lower end of the connecting pipe sleeve 32 positioned below is slidably sleeved on the upper end of the connecting straight pipe 31 and is in sealing connection with the connecting straight pipe 31, and the lower end of the connecting pipe sleeve 32 is fixedly sleeved on the upper end of the lower curved pipe section 20b and is in sealing connection with the lower curved pipe section 20 b; the lower end of the lower bend section 20b is inserted into a communication hole 42 in the drill pipe flange 41 and is sealingly connected to the wall of the communication hole 42.
The advantages of this arrangement are that:
1. through making at least one tip of straight tube section be connected with the curved tube section through coupling assembling, make coupling assembling's connection straight tube be located between straight tube section and the curved tube section and have the clearance with it, make coupling assembling connect one end slip cap of pipe box establish on connecting straight tube and sealing connection with it, make the fixed cover of another tip of connecting the pipe box establish on straight tube section or curved tube section and sealing connection with it, can utilize the sealing connection of connecting pipe box both ends, ensure the gas tightness, can utilize above-mentioned clearance and the relative slip of coupling box and connection straight tube again, eliminate the influence that drilling rod elastic deformation brought, realize the bulk connection of tuber pipe and drilling rod, and a structure is simple, the manufacturing degree of difficulty is little, with low costs, it is effectual to arrange thick liquid.
2. Through making the bend keep away from the tip of straight pipe section and insert and establish in the intercommunicating pore on the drilling rod flange and with the pore wall sealing connection of intercommunicating pore, when tearing open and connect, can utilize the butt joint of intercommunicating pore on the adjacent drilling rod flange to realize the intercommunication between the adjacent tuber pipe, make tuber pipe and drilling rod become a real whole piece, it is more convenient to tear open and connect.
The outer wall of the connecting straight pipe 31 is provided with a first annular groove 311, a first O-shaped sealing ring 312 used for sealing the outer wall of the connecting straight pipe 31 and the inner wall of the connecting pipe sleeve 32 is arranged in the first annular groove 311, and the first annular groove 311 is four in number and symmetrically distributed at two ends of the connecting straight pipe 31.
The outer wall of the connecting tube housing 32 is provided with a first lug plate 321 extending in the radial direction of the connecting straight tube 31, and the lower end portion of the straight tube section 10 and the upper end portion of the lower bend tube section 20b are provided with a second lug plate 322 parallel to the first lug plate 321, and the second lug plate 322 adjacent to the first lug plate 321 of the first lug plate 321 is locked by bolts 323.
Because the wall thickness of the straight pipe section 10 and the curved pipe section is relatively thin, in order to conveniently realize the sleeving connection and sealing with the connecting pipe sleeve 32, in this embodiment, the straight pipe section 10 comprises a straight pipe body 11 and a first pipe sleeve seat 12 connected to the end part of the straight pipe body 11 facing the connecting straight pipe 31, the wall thickness of the first pipe sleeve seat 12 is larger than that of the straight pipe body 11, a first bearing platform 121 for abutting against the upper end surface of the connecting pipe sleeve 32 is arranged on the outer wall of the first pipe sleeve seat 12, a second annular groove 122 for placing a second O-shaped sealing ring 123 is arranged on the side of the first bearing platform 121 facing the connecting straight pipe 31, the first pipe sleeve seat 12 is inserted into the end part of the straight pipe body 11 and welded with the end part of the straight pipe body 11, and a first positioning spigot 124 for inserting positioning and a first conical transition surface 125 for facilitating welding are further arranged on the outer wall of the first pipe sleeve seat 12; the lower curved pipe section 20b comprises a curved pipe body 21 and a second pipe socket 22 connected to the end part of the curved pipe body 21 facing the connecting straight pipe 31, the wall thickness of the second pipe socket 22 is larger than that of the curved pipe body 21, a second bearing platform 221 used for abutting against the lower end surface of the connecting pipe socket 32 and a third annular groove 222 used for placing a third O-shaped sealing ring 223 are arranged on the outer wall of the second pipe socket 22, the third annular groove 222 is located on one side of the second bearing platform 221 facing the connecting straight pipe 31, the second pipe socket 22 is inserted into the end part of the curved pipe body 21 and is in welded connection with the end part, a second positioning spigot 224 used for inserting and positioning and a second cone-shaped transition surface 225 convenient to weld are arranged on the outer wall of the second pipe socket 22, and for convenience in processing, the first pipe socket 12 and the second pipe socket 22 are identical in structure.
In the present embodiment, the upper end portion of the upper bend 20a and the lower end portion of the lower bend 20b are slidably inserted into the communication hole 42, so as to eliminate the influence caused by the elastic deformation of the drill rod by sliding, and avoid the deformation and air leakage of the air pipe.
To prevent the straight pipe section 31 from being separated from the drill pipe 40 in the horizontal direction, in this embodiment, the straight pipe section 31 is provided with a hoop 13, and the straight pipe section 31 is connected to the drill pipe 40 by the hoop 13.
The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. An air pipe for a gas lift reverse circulation drill rod comprises a straight pipe section, bent pipe sections positioned at two ends of the straight pipe section, and a connecting assembly;
the method is characterized in that:
at least one end part of the straight pipe section is connected with the bent pipe section through the connecting assembly, the connecting assembly comprises a connecting straight pipe and a connecting pipe sleeve, the connecting straight pipe is positioned between the straight pipe section and the bent pipe section, a gap is reserved between the connecting straight pipe and the adjacent straight pipe section and/or the bent pipe section, one end part of the connecting pipe sleeve is slidably sleeved on the connecting straight pipe and is in sealing connection with the connecting straight pipe section, and the other end part of the connecting pipe sleeve is fixedly sleeved on the straight pipe section or the bent pipe section and is in sealing connection with the connecting straight pipe section or the bent pipe section; the end part of the bent pipe section, which is far away from the straight pipe section, is inserted into a communication hole on the drill rod flange and is in sealing connection with the drill rod flange.
2. The air duct for a gas lift reverse circulation drill pipe according to claim 1, wherein: the outer wall of the connecting straight pipe is provided with a first annular groove, and a first O-shaped sealing ring used for sealing the outer wall of the connecting straight pipe and the inner wall of the connecting pipe sleeve is arranged in the first annular groove.
3. The air duct for a gas lift reverse circulation drill pipe according to claim 2, wherein: the first annular grooves are provided with a plurality of channels and are symmetrically distributed at two ends of the connecting straight pipe.
4. The air duct for a gas lift reverse circulation drill pipe according to claim 1, wherein: the connecting pipe sleeve is provided with a first lug plate extending along the radial direction of the connecting straight pipe, the end part of the straight pipe section, which faces the connecting pipe sleeve, is provided with a second lug plate parallel to the first lug plate, and the first lug plate is locked with the second lug plate adjacent to the first lug plate through bolts.
5. The air duct for a gas lift reverse circulation drill pipe according to claim 1, wherein: the straight pipe section comprises a straight pipe body and a first pipe sleeve seat connected with the end part of the straight pipe body, which faces the connecting straight pipe, wherein the wall thickness of the first pipe sleeve seat is larger than that of the straight pipe body, a first bearing platform used for propping against the end face of the connecting pipe sleeve and a second annular groove used for placing a second O-shaped sealing ring are arranged on the outer wall of the first pipe sleeve seat, and the second annular groove is located on one side of the first bearing platform, which faces the connecting straight pipe.
6. The air duct for a gas lift reverse circulation drill pipe according to claim 5, wherein: the first pipe sleeve seat is inserted into the end part of the straight pipe body and is in welded connection with the end part of the straight pipe body, and the outer wall of the first pipe sleeve seat is provided with a first positioning spigot for inserting and positioning and a first conical transition surface convenient for welding.
7. The air duct for a gas lift reverse circulation drill pipe according to claim 1, wherein: the elbow section includes the elbow body and connects the elbow body orientation the second pipe box seat of connecting the tip of straight tube, the wall thickness of second pipe box seat is greater than the wall thickness of elbow body, the outer wall of second pipe box seat is equipped with and is used for supporting tightly the second cushion cap of connecting the terminal surface of pipe box to and be used for placing the third annular groove of third O type sealing washer, the third annular groove is located the second cushion cap orientation one side of connecting the straight tube.
8. The air duct for a gas lift reverse circulation drill pipe according to claim 7, wherein: the second pipe sleeve seat is inserted into the end part of the bent pipe body and is in welded connection with the end part of the bent pipe body, and the outer wall of the second pipe sleeve seat is provided with a second positioning spigot for inserting and positioning and a second conical transition surface convenient for welding.
9. The air duct for a gas lift reverse circulation drill pipe according to claim 1, wherein: the end of the bent pipe section is slidably inserted into the communication hole.
10. The air duct for a gas lift reverse circulation drill pipe according to any one of claims 1 to 9, wherein: the upper hoop of the straight pipe section is provided with a hoop, and the straight pipe section is connected with a drill rod through the hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320456002.6U CN219220338U (en) | 2023-03-13 | 2023-03-13 | Air pipe for gas lift reverse circulation drill pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320456002.6U CN219220338U (en) | 2023-03-13 | 2023-03-13 | Air pipe for gas lift reverse circulation drill pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219220338U true CN219220338U (en) | 2023-06-20 |
Family
ID=86752047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320456002.6U Active CN219220338U (en) | 2023-03-13 | 2023-03-13 | Air pipe for gas lift reverse circulation drill pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219220338U (en) |
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2023
- 2023-03-13 CN CN202320456002.6U patent/CN219220338U/en active Active
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