CN220451797U - High-strength universal shaft for well drilling - Google Patents
High-strength universal shaft for well drilling Download PDFInfo
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- CN220451797U CN220451797U CN202321502724.7U CN202321502724U CN220451797U CN 220451797 U CN220451797 U CN 220451797U CN 202321502724 U CN202321502724 U CN 202321502724U CN 220451797 U CN220451797 U CN 220451797U
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- connecting rod
- ball
- joint
- fork
- hard alloy
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- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 239000000956 alloy Substances 0.000 claims abstract description 26
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009933 burial Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of screw drilling tools, in particular to a high-strength universal shaft for drilling. The connecting rod comprises a connecting rod, one end of a spherical cap is fixedly connected with the end of the connecting rod, one part of a pressure-bearing ball is embedded on the spherical cap, the other part of the pressure-bearing ball is embedded on a ball seat, the ball seat is in interference fit with a connector, one end of the pressure-bearing ball is embedded on the spherical cap and is in interference fit with the connector, the connecting rod is connected with the connector through the spherical cap, a connecting fork is arranged on the connector and the connecting rod, and the connecting fork are mutually matched, so that the connector is not required to be sleeved on the connecting rod, the diameter of the connecting rod can be properly increased, and accordingly larger force is born, and larger torque requirements are met. In addition, the hard alloy is inlaid on the contact friction surfaces of the upper joint and the lower joint and the connecting rod, so that the wear resistance between the connecting rod and the upper joint and between the connecting rod and the lower joint can be improved, and the service life of the universal shaft in the embodiment is prolonged.
Description
Technical Field
The utility model relates to the technical field of screw drilling tools, in particular to a high-strength universal shaft for drilling.
Background
The screw drilling tool is one of the most widely used underground power tools in petroleum drilling, and mainly comprises a bypass valve assembly, a motor assembly, a universal shaft assembly and a transmission shaft assembly, wherein the universal shaft assembly is one of key components in the screw drilling tool and mainly serves to convert planetary rotation of the motor into fixed shaft rotation of the transmission shaft and transmit torque and rotation speed generated by the motor to the transmission shaft to a drill bit.
In the prior art, a commonly used universal shaft is a six-ball column type universal shaft, and a six-ball groove structure is arranged between a connecting rod and a movable hinge.
The prior art solutions described above have the following drawbacks: the six-ball type universal shaft is formed by attaching the joint to the link, and in order to attach the joint to the link, the link is required to be thinner than the joint, so that the link cannot bear a large torque.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present utility model provides a high-strength cardan shaft for drilling, which aims to increase the torque that the cardan shaft can bear by changing its connection mode so that it can support the connection with a thicker connecting rod.
The utility model is realized by using the following technical scheme: the utility model provides a well drilling is with high strength cardan shaft, includes the connecting rod, the one end of the tip fixedly connected with ball cap of connecting rod, inlay a part of pressure-bearing ball on the ball cap, another part of pressure-bearing ball inlays on the ball seat, ball seat and joint interference fit, the ball cap inlay the one end of pressure-bearing ball with joint interference fit.
Furthermore, the end part of the connecting rod is also provided with a set screw, and the connecting rod is fixed with the spherical cap through the set screw.
Further, the ball cap is made of 9Gr18 Mo.
Furthermore, the connector is provided with a first connecting fork, the end part of the connecting rod is provided with a second connecting fork, and the shape of the first connecting fork is matched with that of the second connecting fork.
Further, the side face of the first connecting fork is provided with a first hard alloy.
Further, two sides of the second connecting fork are provided with second hard alloy, and the second hard alloy is in contact with the first hard alloy.
Furthermore, the first hard alloy and the second hard alloy are fixed with the corresponding connecting fork in a manner of embedding and welding.
Furthermore, the embedded depth of the first hard alloy and the second hard alloy is more than or equal to 2.5mm.
The utility model has the following technical effects:
the high-strength universal shaft for drilling is different from the prior art in that the connecting rod and the connector are connected by using the spherical cap, and the connector and the connecting rod are provided with the connecting fork which are matched with each other, so that the connector is not required to be sleeved on the connecting rod, the diameter of the connecting rod can be properly increased, and the connecting rod bears larger force and meets larger torque requirements. In addition, the hard alloy is inlaid on the contact friction surfaces of the upper joint and the lower joint and the connecting rod, so that the wear resistance between the connecting rod and the upper joint and between the connecting rod and the lower joint can be improved, and the service life of the universal shaft in the embodiment is prolonged.
The high-strength universal joint for drilling according to the present utility model will be further described with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic illustration of a high strength cardan shaft for drilling;
FIG. 2 is an isometric view of a connecting rod;
fig. 3 is an isometric view of the upper connector.
In the figure: 1-an upper joint, 11-a first hard alloy and 2-a ball seat; 3-pressure-bearing ball, 4-set screw, 5-connecting rod, 51-second hard alloy, 6-lower joint and 7-spherical cap.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific examples described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
As shown in FIG. 1, a high-strength universal shaft for well drilling comprises a connecting rod 5, wherein the end part of the connecting rod 5 is fixedly connected with one end of a ball cap 6, specifically, a threaded hole is formed in the end part of the connecting rod 5, one end of the ball cap 6 extends into the connecting rod 5, a set screw 4 fixedly connects the connecting rod 5 with one end of the ball cap 6 extending into the connecting rod 5 through the threaded hole, the other end of the ball cap 6 extends into a joint 1 and is in interference fit with the joint 1, a part of a pressure-bearing ball 3 is further embedded into the end part of the ball cap 6 extending into the joint, the other part of the pressure-bearing ball 3 is embedded into a ball seat 2, and the ball seat 2 is in interference fit with the joint 1. Wherein, the structures of the joints 1 at the two ends of the connecting rod 5 are identical.
As shown in fig. 2 and 3, it can be seen that a second connecting fork is arranged at the end of the connecting rod 5, two sides of the second connecting fork are respectively provided with a second hard alloy 51, the corresponding joint 1 is provided with a first connecting fork, and similarly, two sides of the first connecting fork are respectively provided with a first hard alloy 11, wherein the first hard alloy 11 is contacted with the second hard alloy 51 and is matched to form a friction layer, the first hard alloy 11 and the second hard alloy 51 are respectively inlaid and welded on the corresponding connecting fork, and the burial depth of the first hard alloy 11 and the second hard alloy 51 on the connecting fork is not smaller than 2.5mm. Further, the second yoke is matched in shape to the first yoke so that the joint 1 can be caught on the link 5 and the joint 1 can be swung slightly on the link 5.
As a further explanation of this example, the cardan shaft is one of the key components in the screw drilling tool, and its working environment is also very severe, so the requirements for its manufacturing and assembling process are very strict, and before the assembly, each component must be cleaned and cleaned, and there must be burrs, flash, oxide skin, rust, cutting chips, greasy dirt, colorant, dust, etc., before the assembly, the main matching dimensions of the components, especially the matching dimensions and the related precision, are also required to be rechecked, and during the assembly, no knocks, scratches and rust are allowed. For the connecting rod 5, the structures at two ends must be identical, the sharp corners of the connecting rod 5 are subjected to dulling treatment, and the hardness of the connecting rod 5 needs to be adjusted so that the HRC of the connecting rod 5 is between 40 and 44, and the whole connecting rod 5 is subjected to phosphating treatment after the manufacturing is finished. The joint 1 is treated in a manner substantially identical to that of the connecting rod 5, except that the joint 1 is only subjected to thread phosphating.
In summary, the connection mode of the joint 1 and the connecting rod 5 is changed by the ball cap 6, and the joint 1 is not required to be sleeved on the connecting rod 5, so that the limit of the diameter of the connecting rod 5 is relaxed, the diameter of the connecting rod 5 can be properly increased, and the universal shaft of the embodiment can bear larger force and can meet larger torque requirements. Meanwhile, the first hard alloy 11 and the second hard alloy 51 are further arranged on the connecting fork of the joint 1 and the connecting rod 5, so that the hardness of the contact surface between the connecting fork is increased, the connecting fork is more wear-resistant, and the service life of the connecting fork is prolonged.
Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model, as will be apparent to those skilled in the art, without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (8)
1. The utility model provides a high strength cardan shaft for well drilling, its characterized in that includes connecting rod (5), the one end of tip fixedly connected with ball cap (6) of connecting rod (5), inlay the part of pressure-bearing ball (3) on ball cap (6), the other part of pressure-bearing ball (3) is inlayed on ball seat (2), ball seat (2) and joint (1) interference fit, the one end that ball cap (6) inlayed pressure-bearing ball (3) with joint (1) interference fit.
2. The high-strength cardan shaft for drilling according to claim 1, characterised in that the connecting rod (5) is further provided with a set screw (4) at its end, the connecting rod (5) being fixed to the spherical cap (6) by means of the set screw (4).
3. The high-strength cardan shaft for drilling according to claim 2, characterised in that the spherical cap (6) is made of 9Gr18 Mo.
4. High strength cardan shaft for drilling according to claim 1, characterised in that the joint (1) is provided with a first connection fork and the end of the connecting rod (5) is provided with a second connection fork, the first connection fork being adapted to the shape of the second connection fork.
5. The high strength cardan shaft for drilling according to claim 4, characterised in that the side of the first connecting fork is provided with a first cemented carbide (11).
6. The high strength cardan shaft for drilling according to claim 5, characterised in that the second connecting fork is provided on both sides with a second cemented carbide (51), said second cemented carbide (51) being in contact with the first cemented carbide (11).
7. The high-strength universal shaft for drilling according to claim 5, wherein the first hard alloy (11) and the second hard alloy (51) are fixed with the corresponding connecting fork by embedding and welding.
8. The high-strength universal shaft for drilling according to claim 6, wherein the inlay depth of the first hard alloy (11) and the second hard alloy (51) is more than or equal to 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321502724.7U CN220451797U (en) | 2023-06-13 | 2023-06-13 | High-strength universal shaft for well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321502724.7U CN220451797U (en) | 2023-06-13 | 2023-06-13 | High-strength universal shaft for well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220451797U true CN220451797U (en) | 2024-02-06 |
Family
ID=89728639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321502724.7U Active CN220451797U (en) | 2023-06-13 | 2023-06-13 | High-strength universal shaft for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220451797U (en) |
-
2023
- 2023-06-13 CN CN202321502724.7U patent/CN220451797U/en active Active
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