CN217897836U - Hydraulic clutch for well drilling - Google Patents
Hydraulic clutch for well drilling Download PDFInfo
- Publication number
- CN217897836U CN217897836U CN202221623732.2U CN202221623732U CN217897836U CN 217897836 U CN217897836 U CN 217897836U CN 202221623732 U CN202221623732 U CN 202221623732U CN 217897836 U CN217897836 U CN 217897836U
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- pipe
- piston
- joint
- clutch
- drilling
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Abstract
The utility model provides a hydraulic clutch for well drilling. Relates to the technical field of oil field downhole tools. The upper joint is connected with the central pipe, the central pipe is connected with the lower joint, the lower joint is provided with a section of rotating pipe, the rotating pipe is connected with the upper joint through a bearing, a piston is arranged between the rotating pipe and the central pipe, the central pipe is provided with a liquid inlet hole, a guide column fixedly connected to the upper part of the piston extends into the upper joint, a compression spring is arranged between the piston and the upper joint, and the lower part of the piston is connected with the lower joint through a sliding spline. The utility model discloses following beneficial effect has: when the friction resistance of the tail pipe or the sieve pipe entering the open hole section is increased and the drilling is difficult to continue, the pressure drop generated by the combination of the bottom of the tail pipe or the sieve pipe of the slurry after the tail pipe or the sieve pipe reaches a certain discharge capacity through the pump circulation acts on the tool, the spline of the piston is separated, the upper part can rotate freely, so that the weight of the drilling tool at the upper part is effectively transferred, the tail pipe or the sieve pipe is safely fed to enable the drilling tool to smoothly enter, and the drilling tool has the characteristics of simple structure, convenience and quickness in installation, high strength, firmness and durability.
Description
The technical field is as follows:
the utility model belongs to the technical field of the oil field instrument in the pit and specifically relates to a hydraulic clutch for well drilling.
The background art comprises the following steps:
when a drilling tool is used for conveying a tail pipe and a sieve pipe in a large-displacement well or a horizontal well, due to the reasons that the track of the well is unsmooth, the curvature is large, the tail pipe or the sieve pipe is not recommended to rotate and the like, the weight of an upper drilling tool cannot be effectively transferred to the tail pipe or the sieve pipe, after the drilling tool enters a naked eye section, the friction resistance is increased, the tail pipe or the sieve pipe cannot normally fall to the bottom of the well, the tail pipe or the sieve pipe is easy to block the drill after the treatment time is slightly long, and the well is even scrapped due to underground complication and high treatment difficulty, so that huge economic loss is brought.
The utility model has the following contents:
in order to overcome the defects of the prior art, the utility model provides a hydraulic clutch for well drilling.
The technical scheme of the utility model is that: the hydraulic clutch for well drilling comprises an upper joint, wherein an inner hole of the upper joint is in threaded sealing connection with a central pipe, the lower part of the central pipe is in clearance fit connection with a lower joint through a sealing ring, a section of rotary pipe extends upwards from the excircle of the lower joint, the rotary pipe is connected with the upper joint through a bearing, a piston is arranged between the rotary pipe and the central pipe, the piston is in clearance fit connection with the rotary pipe and the central pipe through the sealing ring, a liquid inlet hole is formed in the central pipe at the lower part of the piston, a guide column is fixedly connected to the upper part of the piston and extends into a counter bore formed in the upper joint, a compression spring is arranged between the piston and the upper joint, and the lower part of the piston is connected with the lower joint through a sliding spline.
The top of the rotating pipe is connected with a gland through a bolt, the gland is blocked above the bearing outer ring, two back caps are arranged on the lower portion of the bearing inner ring, and the two back caps are connected with an upper connector through bolts.
The lower joint is provided with a lubricating channel at the spline part, and the outer side of the lubricating channel is provided with an oil injection nozzle.
The gland is of an annular structure which is cut into two half bodies, and the bolts for connecting the gland are hexagon socket head cap bolts.
The utility model discloses following beneficial effect has: when the friction resistance of the tail pipe or the sieve pipe entering the open hole section is increased and the drilling is difficult to continue, the pressure drop generated by the combination of the bottom of the tail pipe or the sieve pipe of the slurry after the tail pipe or the sieve pipe reaches a certain discharge capacity through the pump circulation is acted on the tool, the spline shaft of the piston is separated from the spline hole of the lower connector, the upper part can rotate freely, and the tail pipe or the sieve pipe at the lower part of the tool does not rotate, so that the drilling pressure of the weight of the drilling tool at the upper part is effectively transferred, the tail pipe or the sieve pipe is safely fed to enable the drilling tool to be smoothly fed, the working efficiency is improved, and the drilling tool has the characteristics of simple structure, convenience and quickness in installation, high strength, firmness and durability.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic structural diagram of the middle gland of the present invention.
In the figure, 1-an upper joint, 2-a lower joint, 3-a central pipe, 4-a rotating pipe, 5-a back cap, 6-a pressing cover, 7-a piston, 8-a spline, 9-a liquid inlet hole, 10-a bearing, 11-an oil nozzle and 12-a guide column.
The specific implementation mode is as follows:
the present invention will be further explained with reference to the accompanying drawings:
as shown in a figure 1 and a figure 2, the hydraulic clutch for drilling comprises an upper joint 1, a central pipe 3 is in threaded sealing connection with an inner hole of the upper joint 1, the lower part of the central pipe 3 is in clearance fit connection with a lower joint 2 through a sealing ring, a section of rotary pipe 4 extends upwards from the excircle of the lower joint 2, the rotary pipe 4 is connected with the upper joint 1 through a bearing 10, a piston 7 is arranged between the rotary pipe 4 and the central pipe 3, the piston 7 is in clearance fit connection with the rotary pipe 4 and the central pipe 3 through the sealing ring, a liquid inlet hole 9 is formed in the lower part of the piston 7 and the central pipe 3, a guide column 12 is fixedly connected with the upper part of the piston 7, the guide column 12 extends into a counter bore formed in the upper joint 1, the guide column 12 is used for transmitting torque, and a compression spring is arranged between the piston 7 and the upper joint 1, the lower part of a piston 7 is connected with a lower joint 2 through a sliding spline 8, when drilling normally, the piston 7 is connected with the lower joint 2 through the sliding spline 8 under the action of a compression spring, when a tail pipe or a sieve pipe enters an open hole section and the friction resistance is increased and the drilling is difficult to continue, slurry is combined through the bottom of the tail pipe or the sieve pipe to generate pressure drop to act on the tool after reaching a certain displacement through starting a pump cycle, the piston 7 rises, a spline shaft of the piston 7 is separated from a spline hole of the lower joint 2, the upper part can rotate freely, the tail pipe or the sieve pipe at the lower part of the tool does not rotate, so that the drilling pressure of the weight of a drilling tool at the upper part is effectively transferred, the tail pipe or the sieve pipe is safely fed to enable the drilling tool to enter smoothly, and the working efficiency is improved.
The top of the rotating pipe 4 is connected with a gland 6 through a bolt, the gland 6 is blocked above an outer ring of the bearing 10, two back caps 5 are arranged on the lower portion of an inner ring of the bearing 10, and the two back caps 5 are connected with an upper connector 1 through bolts.
The lower joint 2 is provided with a lubricating channel at the position of the spline 8, and an oil nozzle 11 is arranged outside the lubricating channel and used for lubricating the sliding spline 8, so that the spline 8 is prevented from being clamped when being jointed and torque cannot be recovered and transmitted.
Gland 6 is the annular structure of two halfbodies for the cutting, the bolt of connecting gland 6 is hexagon socket head cap screw, when the assembly, at first install bearing 10 on the cylinder of top connection 1 lower part, screw up two back of the body caps 5, then install compression spring in proper order, guide post 12, piston 7, at last with 4 covers of rotatory pipe in the bearing 10 outside, 6 closed buckles the gland of two halfbodies in the bearing 10 top, use the hexagon spanner to screw hexagon socket head cap screw and can accomplish the installation, simple structure simple to operate is quick, the firm durable characteristics of intensity height.
Claims (4)
1. A hydraulic clutch for drilling comprising an upper joint (1), characterized in that: go up joint (1) hole thread sealing connection center tube (3), center tube (3) lower part is connected through sealing washer clearance fit with lower clutch (2), lower clutch (2) excircle upwards extends one section rotatory pipe (4), rotatory pipe (4) are connected through bearing (10) with last joint (1), be equipped with piston (7) between rotatory pipe (4) and center tube (3), piston (7) and rotatory pipe (4), be connected through sealing washer clearance fit between center tube (3), piston (7) lower part, it has feed liquor hole (9) to open on center tube (3), piston (7) upper portion fixed connection guide post (12), guide post (12) stretch into the counter sink that upper clutch (1) was opened in, be equipped with compression spring between piston (7) and upper clutch (1), piston (7) lower part is connected through sliding spline (8) with lower clutch (2).
2. The downhole hydraulic clutch of claim 1, wherein: the top of the rotating pipe (4) is connected with a gland (6) through a bolt, the gland (6) is blocked above an outer ring of the bearing (10), two back caps (5) are arranged on the lower portion of an inner ring of the bearing (10), and the two back caps (5) are connected with an upper connector (1) through bolts.
3. The downhole hydraulic clutch of claim 1, wherein: the lower joint (2) is provided with a lubricating channel at the position of the spline (8), and the outer side of the lubricating channel is provided with an oil injection nozzle (11).
4. The downhole hydraulic clutch of claim 2, wherein: the gland (6) is of an annular structure which is cut into two half bodies, and the bolts for connecting the gland (6) are hexagon socket head cap bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221623732.2U CN217897836U (en) | 2022-06-27 | 2022-06-27 | Hydraulic clutch for well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221623732.2U CN217897836U (en) | 2022-06-27 | 2022-06-27 | Hydraulic clutch for well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217897836U true CN217897836U (en) | 2022-11-25 |
Family
ID=84131795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221623732.2U Active CN217897836U (en) | 2022-06-27 | 2022-06-27 | Hydraulic clutch for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217897836U (en) |
-
2022
- 2022-06-27 CN CN202221623732.2U patent/CN217897836U/en active Active
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