CN210105787U - Reverse circulation drilling top-injection side-discharging device - Google Patents
Reverse circulation drilling top-injection side-discharging device Download PDFInfo
- Publication number
- CN210105787U CN210105787U CN201920169330.1U CN201920169330U CN210105787U CN 210105787 U CN210105787 U CN 210105787U CN 201920169330 U CN201920169330 U CN 201920169330U CN 210105787 U CN210105787 U CN 210105787U
- Authority
- CN
- China
- Prior art keywords
- main shaft
- cover plate
- channel
- main
- bearing assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model discloses a reverse circulation drilling top-injection side-discharging device, which comprises a main shaft, a bearing assembly and a flow dividing device; the upper part and the lower part of the main shaft are respectively connected with a water tap and a double-wall drilling tool; the bearing assembly is arranged on the main shaft step; the shunt device is fixedly suspended at the lower part of the bearing assembly; the drilling medium passing through the water tap enters the injection channel of the double-wall drilling tool through the main channel A; and the returned drilling medium sequentially passes through the double-wall drilling tool return channel, the main channel B, the lateral channel, the main cavity of the flow dividing device and the inner hole of the sand discharge pipe nipple to enter a downstream sand discharge pipeline. The bearing assembly and the flow dividing device are designed in a split mode, the leaked drilling medium cannot pollute the bearing set after the seal in the flow dividing device is damaged, and the bearing set does not need to be disassembled when the flow dividing device is sealed and replaced, so that the difficulty in replacing the seal is reduced; the composite structure of the internal lip-shaped rotary seal and the external packing seal is adopted by the shunting device sealing ring, so that the convenience of sealing maintenance and the service life of the shunting device part are improved.
Description
Technical Field
The utility model relates to a drilling tool especially relates to a reverse circulation well drilling top notes side is arranged device.
Background
The method of drilling by circulating medium from bottom to top to surface with cuttings or core from the center of drill pipe is called reverse circulation center sampling drilling. Single, double or triple layer drill pipes are commonly used, but double wall drill pipes are most common. The circulating medium is pressed in by the annulus between the two pipes and returns from the center of the inner pipe carrying the rock debris (core), so the method is called double-pipe reverse circulation or double-wall drill pipe reverse circulation drilling. With the continuous innovation of the reverse circulation drilling theory and the drilling process, the reverse circulation drilling technology is more and more widely applied to the fields of mineral exploration, water well drilling, oil drilling and the like. In the process of double-wall drill pipe reverse circulation drilling, an adapter is required to be connected between a water faucet and a kelly bar, the adapter mainly has the function of ensuring the injection and return of drilling media, the common structure of the adapter is a side-injection top-drainage structure, and the structure is unsafe in oil drilling because if the fluid returned from the well is top-drainage, the returned fluid enters a water hose after passing through the water faucet and is discharged, and the water hose is washed for a long time to reduce the pressure bearing capacity, so that the water faucet can be possibly caused to fail when the high-pressure fluid is injected by the water faucet to solve complex working conditions; furthermore, when the conventional adapter rotary bearing and the sealing member are assembled together, the sealing leakage can cause the pollution of the bearing, and the bearing needs to be disassembled for replacing the sealing, so that the equipment is inconvenient to maintain.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reverse circulation well drilling top notes side row device to the problem that prior art exists, realizes being connected between tap and the double-walled drilling tool, realizes the injection of well drilling medium and returns out, and the protection hose avoids the bearing group to pollute, increases the convenience of sealed life and maintenance.
In order to achieve the above purpose, the utility model adopts the following design scheme:
a reverse circulation drilling top injection side discharge device comprises a main shaft, a bearing assembly and a flow dividing device; wherein:
the upper part and the lower part of the main shaft are respectively provided with a joint for connecting a water tap and a double-wall drilling tool, the main shaft is a shaft-shaped short section, a main channel A and a main channel B are axially processed in the main shaft, and a lateral channel is radially processed in the main shaft; the main channel A is a through hole, the main channel B is a blind hole which is axially processed from bottom to top in the main shaft, a gap flow channel is reserved between the outer part of the main channel B and the main channel A, the gap flow channel is communicated with an injection channel of the double-wall drilling tool, and the inner part of the main channel B is communicated with a return channel and a lateral channel of the double-wall drilling tool; the outer edge of the main shaft is provided with a raised step which is positioned above the lateral channel;
the bearing assembly is arranged on the main shaft step and forms axial limiting rotation fit through the main shaft step;
the flow dividing device is fixedly suspended at the lower part of the bearing assembly and is in rotary sealing fit with the main shaft; the shunting device comprises a main cavity and a sand discharge pipe nipple, and the main cavity is communicated with an inner hole of the sand discharge pipe nipple, a main channel B and a lateral channel.
The above scheme further comprises:
the bearing assembly comprises an outer cylinder, an upper end cover, a lower end cover and a bearing set; the bearing set is arranged between the outer cylinder and the main shaft and rotates relative to the outer cylinder and the main shaft; the upper end cover and the lower end cover are respectively arranged at the upper end and the lower end of the outer cylinder.
An upper end cover seal and a lower end cover seal are respectively arranged between the upper end cover and the main shaft, and between the lower end cover and the main shaft.
The bearing group is an angular contact ball bearing, and the angular contact ball bearing is arranged on the upper end face and the lower end face of the main shaft step in a face-to-face mode.
The flow dividing device comprises an upper cover plate, a lower cover plate, a middle cylinder and a connecting cylinder; the upper cover plate and the lower cover plate are annular circular plates, and the middle cylinder is of a cylinder structure; the upper cover plate is positioned at the upper part of the main shaft lateral channel; the lower cover plate is positioned at the lower part of the main shaft lateral channel; the middle cylinder is arranged between the upper cover plate and the lower cover plate; a main cavity is formed among the upper cover plate, the lower cover plate, the middle cylinder and the main shaft; the upper cover plate is fixedly connected with the connecting cylinder, and the connecting cylinder is fixedly connected to the bearing assembly.
An upper cover plate sealing ring is arranged between the inner hole of the upper cover plate and the main shaft, and a lower cover plate sealing ring is arranged between the inner hole of the lower cover plate and the main shaft.
The sand discharge pipe nipple is installed on the middle barrel, and an inner hole of the sand discharge pipe nipple is tangent to an inner hole of the middle barrel.
The upper cover plate sealing ring and the lower cover plate sealing ring are respectively composed of two sealing rings, namely a lip-shaped rotary seal close to the main cavity and an external packing seal.
The utility model has the advantages that: (1) the bearing assembly and the flow dividing device are designed in a split mode, the leaked drilling medium cannot pollute the bearing set after the seal in the flow dividing device is damaged, and the bearing set does not need to be disassembled when the flow dividing device is sealed and replaced, so that the difficulty in replacing the seal is reduced; (2) the composite structure of the internal lip-shaped rotary seal and the external packing seal is adopted by the shunting device sealing ring, so that the convenience of sealing maintenance and the service life of the shunting device part are improved.
Drawings
Fig. 1 is the utility model discloses a reverse circulation well drilling top notes side is arranged device appearance structure sketch map.
Fig. 2 is a schematic cross-sectional view taken along a-a of fig. 1.
Fig. 3 is a schematic cross-sectional view of fig. 2B-B.
In the figure: 10. the main shaft 11, the main channel A, 12, the lateral channel 13, the main channel B, 20, the bearing assembly 21, the upper end cover seal 22, the upper end cover 23, the bearing group 24, the outer cylinder 25, the lower end cover 26, the lower end cover seal 30, the shunt device 31, the upper cover plate seal ring 32, the upper cover plate 33, the middle cylinder 34, the lower cover plate 35, the lower cover plate seal ring 36, the sand discharge pipe short section 37, the main chamber 38, the connecting cylinder 39, the inner hole of the sand discharge pipe short section 40, the double-wall drilling tool 41, the inner pipe 42, the outer pipe 43, the return channel 44 and the injection channel.
Detailed Description
The invention will be further described with reference to fig. 1, 2 and 3:
embodiment 1, a reverse circulation well drilling top-injection side-discharging device, comprising a main shaft 10, a bearing assembly 20 and a flow dividing device 30; wherein:
the upper part and the lower part of the main shaft 10 are respectively provided with a joint for connecting a water tap and a double-wall drilling tool 40, the main shaft 10 is a shaft-shaped short section, a main channel A11 and a main channel B13 are axially processed in the main shaft, and a lateral channel 12 is radially processed in the main shaft; the main channel A11 is a through hole, the main channel B13 is a blind hole processed from bottom to top in the axial direction in the main shaft 10, a gap flow channel is reserved between the outer part of the main channel B13 and the main channel A11, the gap flow channel is communicated with the injection channel 44 of the double-wall drilling tool, and the inner part of the main channel B13 is communicated with the return channel 43 and the lateral channel 12 of the double-wall drilling tool; a raised step is processed on the outer edge of the main shaft 10 and is positioned above the lateral channel 12;
the bearing assembly 20 is arranged on the step of the main shaft 10 and forms axial limiting rotation fit through the step of the main shaft 10;
the flow dividing device 30 is fixedly suspended at the lower part of the bearing assembly 20 and is in rotary sealing fit with the main shaft; the flow dividing device 30 comprises a main chamber 37 and a sand discharge pipe nipple 36, wherein the main chamber 37 is communicated with a sand discharge pipe nipple inner hole 39, a main channel B13 and a lateral channel 12.
Example 2, based on example 1, further comprises:
the bearing assembly 20 comprises an outer cylinder 24, an upper end cover 22, a lower end cover 25 and a bearing set 23; the bearing set 23 is arranged between the outer cylinder 24 and the main shaft 10, and the two rotate relatively; the upper and lower caps 22 and 25 are mounted on the upper and lower ends of the outer cylinder 24, respectively.
An upper end cap seal 21 and a lower end cap seal 26 are respectively installed between the upper end cap 22 and the lower end cap 25 and the main shaft 10.
The bearing group 23 is 2 angular contact ball bearings, and the 2 angular contact ball bearings are arranged on the upper end face and the lower end face of the step of the main shaft 10 in a face-to-face mode.
The flow dividing device 30 comprises an upper cover plate 32, a lower cover plate 34, an intermediate barrel 33 and a connecting barrel 38; the upper cover plate 32 and the lower cover plate 34 are annular circular plates, and the middle cylinder 33 is of a cylindrical structure; the upper cover plate 32 is positioned at the upper part of the lateral channel 12 of the main shaft 10; the lower cover plate 34 is positioned at the lower part of the main shaft lateral channel 12; the intermediate cartridge 33 is mounted between the upper cover plate 32 and the lower cover plate 34; a main chamber 37 is formed among the upper cover plate 32, the lower cover plate 34, the intermediate cylinder 33 and the main shaft 10; the upper cover plate 32 is fixedly connected to the connecting cylinder 38, and the connecting cylinder 38 is fixedly connected to the bearing assembly 20.
An upper cover plate sealing ring 31 is arranged between the inner hole of the upper cover plate and the main shaft, and a lower cover plate sealing ring 35 is arranged between the inner hole of the lower cover plate and the main shaft.
The sand discharge pipe nipple 36 is arranged on the middle barrel 33, and an inner hole 39 of the sand discharge pipe nipple is tangent to an inner hole of the middle barrel 33.
The upper cover plate sealing ring 31 and the lower cover plate sealing ring 35 are formed by two sealing rings, namely a lip-shaped rotary seal close to the main cavity 37 and an external packing seal.
Exemplary embodiment 3, a reverse circulation drilling top-injection side-discharge device comprises a main shaft 10, a bearing assembly 20 and a flow dividing device 30, wherein the upper part and the lower part of the main shaft 10 are respectively connected with a water tap (not shown) and a double-wall drilling tool 40. The double wall drilling tool 40 comprises an inner pipe 41 and an outer pipe 42, the inner pipe 42 forming a drilling medium return passage 43 inside, and the inner pipe and the outer pipe forming a drilling medium injection passage 44 between them. The main shaft 10 is a shaft-shaped short section, a main channel A11 and a main channel B13 are axially processed in the main shaft, and a lateral channel 12 is radially processed in the main shaft. The main passage a11 is a through hole through which drilling medium passing through the tap enters the double wall tool injection passage 44 through the main passage a 11. The main passage B13 is a blind hole machined axially from bottom to top in the main shaft 10 and is communicated with the double-wall drilling tool return passage 43 and the lateral passage 12, respectively. A raised step is processed on the outer edge of the main shaft 10 and is positioned above the lateral channel 12; the bearing assembly 20 is mounted on the step of the main shaft 10. The flow dividing device 30 is fixedly suspended at the lower part of the bearing assembly 20, and the flow dividing device and the bearing assembly rotate relative to the main shaft 10; the flow dividing device 30 comprises a main chamber 37 and a sand discharge pipe nipple 36, and the main chamber 37 is communicated with an inner hole 39 of the sand discharge pipe nipple. The drilling medium passes through the double-wall drilling tool return passage 43, the main passage B13, the lateral passage 12, the diversion device main chamber 37 and the inner hole 39 of the sand discharge pipe nipple in sequence and enters the downstream sand discharge pipeline.
The bearing assembly 20 comprises an outer cylinder 24, an upper end cover 22, a lower end cover 25, a bearing group 23, an upper end cover seal 21 and a lower end cover seal 26; a bearing group 23 is arranged between the outer cylinder 24 and the main shaft 10, and the two rotate relatively; the upper end and the lower end of the outer cylinder 24 are respectively provided with an upper end cover 22 and a lower end cover 25, and an upper end cover seal 21 and a lower end cover seal 26 are respectively arranged between the upper end cover 22 and the lower end cover 25 and the main shaft 10. The bearing group 23 is 2 angular contact ball bearings, and the 2 angular contact ball bearings are arranged on the upper end face and the lower end face of the step of the main shaft 10 in a face-to-face mode.
The flow dividing device 30 comprises an upper cover plate 32, a lower cover plate 34, an intermediate barrel 33 and a connecting barrel 38; the upper cover plate 32 and the lower cover plate 34 are annular circular plates, and the middle cylinder 33 is of a cylindrical structure; the upper cover plate 32 is positioned at the upper part of the main shaft lateral channel 12, and an upper cover plate sealing ring 31 is arranged between the inner hole of the upper cover plate and the main shaft; the lower cover plate 34 is positioned at the lower part of the main shaft lateral channel 12, and a lower cover plate sealing ring 35 is arranged between the inner hole of the lower cover plate and the main shaft; the intermediate cartridge 33 is mounted between the upper cover plate 32 and the lower cover plate 34; a main chamber 37 is formed among the upper cover plate 32, the lower cover plate 34, the intermediate cylinder 33 and the main shaft 10; the upper cover plate 32 is fixedly connected to the connecting cylinder 38, and the connecting cylinder 38 is fixedly connected to the bearing assembly 20. The sand discharge pipe nipple 36 is arranged on the middle cylinder 33, and an inner hole 39 of the sand discharge pipe nipple is tangent to an inner hole of the middle cylinder 33. The upper cover plate seal ring 31 and the lower cover plate seal ring 35 are formed by two types of seal rings, namely a lip-shaped rotary seal close to the main cavity 37 and an external packing seal. And when the lip-shaped rotary seal fails, the packing gland is pressed tightly so as to enable the packing seal to be effective.
The outer barrel 24 of the bearing assembly 20 is connected to the non-rotating body of the faucet by anti-rotation means, thereby preventing rotation of the outer barrel 24 and, in turn, the diverter device 30 and the drain line.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The reverse circulation drilling top-injection side-discharging device is characterized by comprising a main shaft (10), a bearing assembly (20) and a flow dividing device (30); wherein:
the upper part and the lower part of the main shaft (10) are respectively provided with a joint for connecting a water tap and a double-wall drilling tool (40), the main shaft (10) is a shaft-shaped short section, a main channel A (11) and a main channel B (13) are axially processed in the main shaft, and a lateral channel (12) is radially processed in the main shaft; the main channel A (11) is a through hole, the main channel B (13) is a blind hole which is axially processed from bottom to top in the main shaft (10), a clearance flow channel is reserved between the outer part of the main channel B (13) and the main channel A (11), the clearance flow channel is communicated with an injection channel (44) of the double-wall drilling tool, and the inner part of the main channel B (13) is communicated with a return channel (43) and a lateral channel (12) of the double-wall drilling tool; the outer edge of the main shaft (10) is provided with a raised step which is positioned above the lateral channel (12);
the bearing assembly (20) is arranged on the step of the main shaft (10) and forms axial limiting rotation fit through the step of the main shaft (10);
the shunt device (30) is fixedly suspended at the lower part of the bearing assembly (20) and is in rotary sealing fit with the main shaft; the shunting device (30) comprises a main chamber (37) and a sand discharge pipe short section (36), wherein the main chamber (37) is communicated with an inner hole (39) of the sand discharge pipe short section, a main channel B (13) and a lateral channel (12).
2. The reverse circulation drilling top injection side discharge device according to claim 1, wherein: the bearing assembly (20) comprises an outer cylinder (24), an upper end cover (22), a lower end cover (25) and a bearing set (23); the bearing set (23) is arranged between the outer cylinder (24) and the main shaft (10) and rotates relatively; the upper end cover (22) and the lower end cover (25) are respectively arranged at the upper end and the lower end of the outer cylinder (24).
3. The reverse circulation drilling top injection side discharge device according to claim 2, wherein: an upper end cover seal (21) and a lower end cover seal (26) are respectively arranged between the upper end cover (22) and the lower end cover (25) and the main shaft (10).
4. The reverse circulation drilling top injection side discharge device according to claim 2, wherein: the bearing group (23) is 2 angular contact ball bearings, and the 2 angular contact ball bearings are arranged on the upper end face and the lower end face of the step of the main shaft (10) in a face-to-face mode.
5. The reverse circulation drilling top injection side discharge device according to any one of claims 1 to 4, wherein: the flow dividing device (30) comprises an upper cover plate (32), a lower cover plate (34), an intermediate barrel (33) and a connecting barrel (38); the upper cover plate (32) and the lower cover plate (34) are annular circular plates, and the middle cylinder (33) is of a cylindrical structure; the upper cover plate (32) is positioned at the upper part of the lateral channel (12) of the main shaft (10); the lower cover plate (34) is positioned at the lower part of the main shaft lateral channel (12); the middle cylinder (33) is arranged between the upper cover plate (32) and the lower cover plate (34); a main cavity (37) is formed among the upper cover plate (32), the lower cover plate (34), the middle cylinder (33) and the main shaft (10); the upper cover plate (32) is fixedly connected with the connecting cylinder (38), and the connecting cylinder (38) is fixedly connected to the bearing assembly (20).
6. The reverse circulation drilling top injection side discharge device according to claim 4, wherein: an upper cover plate sealing ring (31) is arranged between the inner hole of the upper cover plate and the main shaft, and a lower cover plate sealing ring (35) is arranged between the inner hole of the lower cover plate and the main shaft.
7. The reverse circulation drilling top injection side discharge device according to claim 4, wherein: the sand discharge pipe nipple (36) is installed on the middle barrel (33), and an inner hole (39) of the sand discharge pipe nipple is tangent to an inner hole of the middle barrel (33).
8. The reverse circulation drilling top injection side discharge device according to claim 6, wherein: the upper cover plate sealing ring (31) and the lower cover plate sealing ring (35) are formed by two sealing rings, namely a lip-shaped rotary seal close to the main cavity (37) and an external packing seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920169330.1U CN210105787U (en) | 2019-01-31 | 2019-01-31 | Reverse circulation drilling top-injection side-discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920169330.1U CN210105787U (en) | 2019-01-31 | 2019-01-31 | Reverse circulation drilling top-injection side-discharging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210105787U true CN210105787U (en) | 2020-02-21 |
Family
ID=69531278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920169330.1U Active CN210105787U (en) | 2019-01-31 | 2019-01-31 | Reverse circulation drilling top-injection side-discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210105787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431558A (en) * | 2020-12-10 | 2021-03-02 | 中国海洋石油集团有限公司 | Inner rotation backwashing oil pipe nipple device |
-
2019
- 2019-01-31 CN CN201920169330.1U patent/CN210105787U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431558A (en) * | 2020-12-10 | 2021-03-02 | 中国海洋石油集团有限公司 | Inner rotation backwashing oil pipe nipple device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3504936A (en) | Extensible coupling for well pipes | |
| CN205298549U (en) | Take packing structure of sealed function of spring pretension | |
| CN114635662B (en) | Rotary blowout preventer capable of monitoring rubber core state and preventing drilling fluid from overflowing and system | |
| US4585256A (en) | Side feed water swivel | |
| CN210105787U (en) | Reverse circulation drilling top-injection side-discharging device | |
| CN105570580A (en) | Double-medium high-pressure rotating joint | |
| CN204984334U (en) | Rotary blowout preventer | |
| US20170122055A1 (en) | Unitized lip seal for wash pipe stuffing box sealing system | |
| CN111502566A (en) | Reverse circulation drilling top-injection side-discharging device | |
| CN110965940B (en) | Automatic vertical drilling device | |
| CN210510673U (en) | A rotary joint of electro-hydraulic composite cable used for in-service inspection robot of storage tank | |
| CN209818038U (en) | Gas-liquid double-flow injection allocation tool | |
| CN207989811U (en) | Multi-way valve | |
| CN211008498U (en) | Double-flow-passage fluid injection device | |
| CN216811672U (en) | Large-displacement rotary valve pulse generating device | |
| CN117307096A (en) | High-temperature-resistant stratum isolation valve for thickened oil thermal recovery well | |
| WO2020249028A1 (en) | Double-flow-channel fluid injection apparatus | |
| CN112761543B (en) | High-pressure sealing washing pipe capable of adapting to axial and radial offset | |
| CN111396557B (en) | Split structure drilling rig faucet | |
| CN112502656B (en) | Screw type local reverse circulation milling fishing tool | |
| CN111441729B (en) | A detachable high-sealing double-wall drill pipe | |
| CN105756577A (en) | Double-fluid drilling top drive adapter with dynamic pressure seal compensation | |
| CN111981133A (en) | Water turbine with main shaft sealing structure | |
| CN222526240U (en) | Reverse circulation double-wall gas box sealing structure for drilling tool | |
| CN222543295U (en) | A leakproof double-channel swivel joint |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |