CN203097708U - Anti-fall device for transmission shaft of screw drill - Google Patents
Anti-fall device for transmission shaft of screw drill Download PDFInfo
- Publication number
- CN203097708U CN203097708U CN 201220498598 CN201220498598U CN203097708U CN 203097708 U CN203097708 U CN 203097708U CN 201220498598 CN201220498598 CN 201220498598 CN 201220498598 U CN201220498598 U CN 201220498598U CN 203097708 U CN203097708 U CN 203097708U
- Authority
- CN
- China
- Prior art keywords
- transmission shaft
- radial bearing
- lower radial
- baffle ring
- screw drill
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses an anti-fall device for a transmission shaft of a screw drill. In order to overcome the defect that a pin is frequently sheared off and cannot have an anti-fall effect when the transmission shaft is broken existing in the conventional screw drill that an anti-fall device provided with a radial pin is adopted by the transmission shaft. The anti-fall device comprises a transmission shaft, a lower radial bearing and a lower short section, wherein a lower radial bearing fixed sleeve is fixedly arranged in a lower short section inner hole; a lower radial bearing movable sleeve is fixedly arranged on the transmission shaft; a circlip for shaft is arranged in an annular groove of the transmission shaft above the lower radial bearing movable sleeve; an anti-drop baffle ring is fixedly arranged in a lower end part inner hole of the lower short section; a circlip for hole is arranged in an annular groove of the lower short section below the anti-drop baffle ring; and the internal diameter of the anti-drop baffle ring is less than the external diameter of the lower radial bearing movable sleeve. The anti-fall device has the beneficial effects of rational structure, convenience in assembly and capabilities of effectively preventing grave accidents of the screw drill due to breakage of the transmission shaft and improving the safety of drilling of the screw drill.
Description
Technical field
The utility model relates to the down-hole helicoid hydraulic motor that a kind of oil drilling or well workover are used, and especially relates to a kind of screw drill transmission shaft anti-drop device.
Background technology
Helicoid hydraulic motor is to use well dynamic instrument very widely in the petroleum exploration and development, is applicable to the special well drilling well/workover treatment such as window of directional well, horizontal well, sidetracking.Helicoid hydraulic motor mainly comprises motor assembly, universal drive shaft assembly, by-pass valve assembly and driving-shaft assembly, and driving-shaft assembly wherein comprises power transmission shaft, transmission shaft shell, journal bearing, thrust bearings, water cap etc.
In the wellbore construction process, the screw drill transmission shaft lower end connects drill bit, when boring the special rock stratum of chance or running into complex working condition, bit force changes greatly, and power transmission shaft bears fluctuating load, stressed complexity, fracture taking place easily fall into the shaft bottom, influences normally carrying out of wellbore construction.In order to address this problem, disclosed Chinese utility model patent on October 15th, 2003 " screw drill transmission shaft anti-drop device " (publication number CN2580085), quiet the putting of lower radial bearing pin is installed, pin is radially installed along the quiet cover of lower radial bearing, the end that pin stretches out is corresponding with the power transmission shaft outer circumferential groove, and stretches in the groove.It is simple in structure, and is easy to process, is easy to assembling and maintenance, but because the strength deficiency of pin is often cut off pin during drive shafts fracture, perhaps power transmission shaft ruptures in the annular groove position, falling-proof apparatus does not just have anti-lost effect, will cause the fall major accident of well of drive shafts fracture.
The utility model content
Often pin is cut off when existing screw drill transmission shaft adopts the drive shafts fracture that the radially anti-drop device existence of pin is installed in order to overcome, perhaps power transmission shaft ruptures in the annular groove position, falling-proof apparatus does not have the deficiency of anti-lost effect, and the utility model provides a kind of screw drill transmission shaft anti-drop device.
The technical scheme that its technical problem that solves the utility model adopts is: the screw drill transmission shaft anti-drop device, comprise power transmission shaft, lower radial bearing, following pipe nipple, the quiet cover of lower radial bearing is fixedly mounted on down in the pipe nipple endoporus, the moving cover of lower radial bearing is fixedly mounted on the power transmission shaft, and the top of the moving cover of lower radial bearing has circlip for shaft to be installed in the cannelure of power transmission shaft; Be installed with anti-lost baffle ring in the bottom endoporus of following pipe nipple, anti-lost baffle ring below is porose to be installed in down with back-up ring in the cannelure of pipe nipple; Gapped between anti-lost baffle ring and the power transmission shaft cylindrical, anti-lost baffle ring internal diameter is less than the external diameter of the moving cover of lower radial bearing.Anti-lost baffle ring is threaded with following pipe nipple.
The beneficial effects of the utility model are, and are rational in infrastructure, are convenient to assembling, effectively avoid helicoid hydraulic motor because of the drive shafts fracture well that falls causes a serious accident, and improve the safety of helicoid hydraulic motor drilling well.
Description of drawings
Fig. 1 is the utility model screw drill transmission shaft anti-drop device structural representation.
Among the figure: 1. power transmission shaft, 2. hole back-up ring, 3. anti-lost baffle ring, 4. the moving cover of lower radial bearing 5. descends pipe nipple, 6. circlip for shaft.
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 to the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
Referring to accompanying drawing 1.The utility model screw drill transmission shaft anti-drop device comprises power transmission shaft 1, lower radial bearing, following pipe nipple 5, and the quiet cover of lower radial bearing is fixedly mounted on down in pipe nipple 5 endoporus, and the moving cover 4 of lower radial bearing is fixedly mounted on the power transmission shaft 1.The top of the moving cover 4 of lower radial bearing has circlip for shaft 6 to be installed in the cannelure of power transmission shaft 1; Be installed with anti-lost baffle ring 3 in the bottom endoporus of following pipe nipple 5, anti-lost baffle ring 3 adopts usually with following pipe nipple 5 and is threaded.Anti-lost baffle ring 3 belows are porose to be installed in down with back-up ring 2 in the cannelure of pipe nipple 5; Gapped between anti-lost baffle ring 3 and power transmission shaft 1 cylindrical, anti-lost baffle ring 3 internal diameters are less than the external diameter of the moving cover 4 of lower radial bearing.
On helicoid hydraulic motor, adopt the utility model power transmission shaft anti-drop device, in case the drive shafts fracture accident takes place, the downward play of power transmission shaft is to certain position, the lower surface of the moving cover of lower radial bearing is sitting in the upper surface of anti-lost baffle ring, power transmission shaft continues downward play, the circlip for shaft that is installed on the power transmission shaft can be stuck in the moving upper surface of overlapping of lower radial bearing, prevents that power transmission shaft from from deviating from the pipe nipple down, preventing the well accident.
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 claim scope of this patent.
Claims (2)
1. a screw drill transmission shaft anti-drop device comprises power transmission shaft, lower radial bearing, following pipe nipple, and the quiet cover of lower radial bearing is fixedly mounted on down in the pipe nipple endoporus, and the moving cover of lower radial bearing is fixedly mounted on the power transmission shaft, it is characterized in that:
The top of the moving cover of described lower radial bearing (4) has circlip for shaft (6) to be installed in the cannelure of power transmission shaft (1);
Be installed with anti-lost baffle ring (3) in the bottom endoporus of described pipe nipple (5) down, anti-lost baffle ring (3) below is porose to be installed in down in the cannelure of pipe nipple (5) with back-up ring (2);
Gapped between described anti-lost baffle ring (3) and power transmission shaft (1) cylindrical, anti-lost baffle ring (3) internal diameter is less than the external diameter of the moving cover of lower radial bearing (4).
2. according to the described screw drill transmission shaft anti-drop device of claim 1, it is characterized in that: described anti-lost baffle ring (3) is threaded with following pipe nipple (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220498598 CN203097708U (en) | 2012-09-27 | 2012-09-27 | Anti-fall device for transmission shaft of screw drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220498598 CN203097708U (en) | 2012-09-27 | 2012-09-27 | Anti-fall device for transmission shaft of screw drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203097708U true CN203097708U (en) | 2013-07-31 |
Family
ID=48849118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220498598 Expired - Fee Related CN203097708U (en) | 2012-09-27 | 2012-09-27 | Anti-fall device for transmission shaft of screw drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203097708U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454945A (en) * | 2014-10-13 | 2015-03-25 | 中国石油天然气集团公司 | Assembled transmission shaft for CAIMS (China Adjustable Instrumented Motor System) |
| CN104763322A (en) * | 2015-03-31 | 2015-07-08 | 青岛江汉石油机械有限公司 | Four-loosening-preventing and two-falling-preventing type power output shaft of screw drill |
| CN116357221A (en) * | 2023-05-31 | 2023-06-30 | 德州联合石油科技股份有限公司 | Screw drilling tool |
-
2012
- 2012-09-27 CN CN 201220498598 patent/CN203097708U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454945A (en) * | 2014-10-13 | 2015-03-25 | 中国石油天然气集团公司 | Assembled transmission shaft for CAIMS (China Adjustable Instrumented Motor System) |
| CN104454945B (en) * | 2014-10-13 | 2017-03-01 | 中国石油天然气集团公司 | A kind of combined transmission shaft for measurement and transmission motor |
| CN104763322A (en) * | 2015-03-31 | 2015-07-08 | 青岛江汉石油机械有限公司 | Four-loosening-preventing and two-falling-preventing type power output shaft of screw drill |
| CN116357221A (en) * | 2023-05-31 | 2023-06-30 | 德州联合石油科技股份有限公司 | Screw drilling tool |
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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: 20130731 Termination date: 20200927 |