CN201818290U - Anti-friction anti-drag universal shaft - Google Patents
Anti-friction anti-drag universal shaft Download PDFInfo
- Publication number
- CN201818290U CN201818290U CN2010205882922U CN201020588292U CN201818290U CN 201818290 U CN201818290 U CN 201818290U CN 2010205882922 U CN2010205882922 U CN 2010205882922U CN 201020588292 U CN201020588292 U CN 201020588292U CN 201818290 U CN201818290 U CN 201818290U
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- universal
- joint
- joint fork
- hole
- lug
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Abstract
The utility model relates to an anti-friction anti-drag universal shaft. In order to overcome the defect of high frictional drag in the process of sidetracking and radial perforating string running as well as the defect of great loss of transfer torque of radial hydraulic perforation technology in any direction in the existing universal shaft, the universal shaft provided by the utility model is formed by orderly connecting two or more than two universal joints through connecting pins, and each universal joint is formed by axially fixedly connecting a universal yoke I and a universal yoke II through a connection screw; the outer circle of each universal joint body is provided with a needle roller bearing; the heads of the universal yoke I and the universal yoke II are two lugs which are parallel and symmetric in the radial direction; the lugs at the connecting ends of every two universal joints form an angle of 90 degrees, and a connection block is installed among the four lugs; the center of the connection block is provided with a cross hole which is communicated with a radial hole in each lug; and the connecting pins and split pins are installed in the cross hole of the connection block and the holes of the lugs. The utility model has the advantages of simple and reasonable structure, and convenience for machining and manufacturing, and can realize turn flexion at any angle and transfer torque, thereby achieving the goal of reducing frictional drag.
Description
Affiliated technical field
The utility model relates to a kind of oil and gas development directed drilling universal drive shaft, especially relates to a kind of window antifriction drag reduction universal drive shaft of perforating job of sidetracking that is applied to.
Background technology
Radially the hydraulic perforating technology is the effective ways that solve deep penetrating perforating, and this method can also eject flow-guiding channel in subterranean strata, is the new technology that improves oil-gas field development level and oil-water well stimulation work.When onshore oil field exploitation enters the middle and later periods, perforation is worn the depth, later stage measures to reform complex process, and input expense height, and can pollute oil reservoir, have a strong impact on the raising of field output.Bent-tube boiler guider (inventor applies for a patent separately) is that radially the hydraulic perforating technology is implemented necessary tool, universal drive shaft is with sidetracking is windowed, radially the perforation tubing string is sent into pit shaft essential tool by guider, because the tubing string internal diameter is little, elbow radius is little, the frictional resistance of tubing string is big, and existing universal drive shaft can't satisfy the radially requirement of hydraulic perforation technology any direction transfer torque.
The utility model content
Window in order to overcome sidetracking, radially the used guider internal diameter of perforation is little, radius of curvature is little, sidetracking windows, radially fashionable frictional resistance is big under the perforation tubing string, there is radially hydraulic perforation technology any direction transfer torque loss in existing universal drive shaft greatly, can't satisfy the radially deficiency of hydraulic perforation technology any direction transfer torque requirement, the utility model provides a kind of antifriction drag reduction universal drive shaft.
The technical scheme that its technical problem that solves the utility model adopts is: antifriction drag reduction universal drive shaft comprises universal-joint fork I, universal-joint fork II, universal-joint fork I and universal-joint fork II connect to form universal joint, and 2 or 2 connect to form universal drive shaft with upper cardan successively by connecting pin.Attachment screw connects to form universal joint with universal-joint fork I and universal-joint fork II axial restraint; On the universal joint main body excircle needle bearing is installed; Universal-joint fork I jaw, universal-joint fork II jaw are the lug of 2 symmetries that radially are parallel to each other; The lug of 2 universal joint links is in 90 °, between 4 lugs contiguous block is installed; There are right-angled intersection hole and corresponding the communicating of radial hole on the lug in the contiguous block center, and connecting pin and split pin are installed in the hole of the right-angled intersection hole of contiguous block and lug.There is radial direction through hole at the connecting pin middle part, after an end of split pin passes the radial direction through hole of connecting pin, is connected with split pin fixed by nut.The circular cone endoporus of the taper seat of attachment screw one end and universal-joint fork II lug end root matches, and the other end is fixedlyed connected with described universal-joint fork I endoporus by screw thread.Universal joint main body excircle middle part diameter is less than the two ends diameter, and universal joint main body middle part is equipped with needle roller, and the outer bearing shell of needle roller is installed between the boss of main body two ends.
The beneficial effects of the utility model are, and are simple and reasonable, are convenient to processing and manufacturing, can realize arbitrarily angled bending and the transfer torque of turning to, and reach the purpose that reduces frictional resistance, reduces moment of torsion.
Description of drawings
Fig. 1 is the utility model antifriction drag reduction universal drive shaft structural representation.
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1. universal-joint fork I, 2. needle roller, 3. bearing shell, 4. attachment screw, 5. universal-joint fork II, 6. connecting pin, 7. universal joint, 8. contiguous block, 9. split pin, 10. split pin nut, 11. lugs.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.But what those skilled in the art should know is that the utility model is not limited to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
With reference to accompanying drawing.The utility model antifriction drag reduction universal drive shaft comprises universal-joint fork I 1, universal-joint fork II 5, and universal-joint fork I 1 and universal-joint fork II 2 axially connect to form universal joint 7, and there is lug 11 at universal joint 7 two ends, and the middle part is a main body; 2 or 2 connect to form universal drive shaft successively with upper cardan 7.
Universal-joint fork I 1 axially is connected by attachment screw 4 with universal-joint fork II 5.The circular cone endoporus of the cone of attachment screw 4 one ends and universal-joint fork II 5 lug end roots matches, and the other end is fixedlyed connected with universal-joint fork I 1 endoporus by screw thread.
On the universal joint 7 main body excircles needle bearing is installed; Universal joint 7 main body excircles middle part diameter is equipped with needle roller 2 less than the two ends diameter on the middle part excircle of universal joint 7 main bodys, and the bearing shell 3 in needle roller 2 outsides is installed between the boss of main body two ends.
Universal-joint fork I 1 jaw, universal-joint fork II 5 jaws are the lug 11 of 2 symmetries that radially are parallel to each other; 4 lugs 11 of 2 universal joint 7 links are in 90 °, between 4 lugs 11 contiguous block 8 are installed.Contiguous block 8 is generally hexahedron, and there is corresponding the communicating of radial hole on right-angled intersection hole and the lug 11 at contiguous block 8 centers, and connecting pin 6 and split pin 9 are installed in the hole of the right-angled intersection hole of contiguous block 8 and lug 11.There is radial direction through hole at connecting pin 6 middle parts, after an end of split pin 9 passes the radial direction through hole of connecting pin (6), fixedly connected the back with split pin nut 10 and form cross pin.
It should be noted that the foregoing description is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the scope of claims.
Claims (4)
1. an antifriction drag reduction universal drive shaft comprises universal-joint fork I, universal-joint fork II, and universal-joint fork I and universal-joint fork II connect to form universal joint, and 2 or 2 connect to form universal drive shaft with upper cardan successively by connecting pin, it is characterized in that:
Attachment screw (4) connects to form universal joint (7) with universal-joint fork I (1) and universal-joint fork II (5) axial restraint;
On universal joint (7) the main body excircle needle bearing is installed;
Universal-joint fork I (1) jaw, universal-joint fork II (5) jaw are the lug (11) of 2 symmetries that radially are parallel to each other; The lug (11) of 2 universal joints (7) link is in 90 °, and contiguous block (8) is installed between 4 lugs (11); There is corresponding the communicating of radial hole on right-angled intersection hole and the lug (11) at contiguous block (8) center, and connecting pin (6) and split pin (9) are installed in the hole of the right-angled intersection hole of contiguous block (8) and lug (11).
2. according to the described antifriction drag reduction of claim 1 universal drive shaft, it is characterized in that: there is radial direction through hole at described connecting pin (6) middle part, after an end of split pin (9) passes the radial direction through hole of connecting pin (6), fixedlys connected with split pin nut (10).
3. according to the described antifriction drag reduction of claim 2 universal drive shaft, it is characterized in that: the circular cone endoporus of the taper seat of described attachment screw (4) one ends and described universal-joint fork II (5) lug end root matches, and the other end is fixedlyed connected with described universal-joint fork I (1) endoporus by screw thread.
4. according to the described antifriction drag reduction of claim 3 universal drive shaft, it is characterized in that: described universal joint (7) main body excircle middle part diameter is less than the two ends diameter, universal joint (7) main body middle part is equipped with needle roller (2), and the outer bearing shell (3) of needle roller (2) is installed between the boss of main body two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205882922U CN201818290U (en) | 2010-10-28 | 2010-10-28 | Anti-friction anti-drag universal shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205882922U CN201818290U (en) | 2010-10-28 | 2010-10-28 | Anti-friction anti-drag universal shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201818290U true CN201818290U (en) | 2011-05-04 |
Family
ID=43916252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205882922U Expired - Fee Related CN201818290U (en) | 2010-10-28 | 2010-10-28 | Anti-friction anti-drag universal shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201818290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454392A (en) * | 2010-10-28 | 2012-05-16 | 大港油田集团有限责任公司 | Antifriction resistance-reduction universal shaft |
-
2010
- 2010-10-28 CN CN2010205882922U patent/CN201818290U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102454392A (en) * | 2010-10-28 | 2012-05-16 | 大港油田集团有限责任公司 | Antifriction resistance-reduction universal shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110504 Termination date: 20191028 |