CN204386496U - A kind of mechanical type falls to rub to subtract turns round pipe nipple - Google Patents
A kind of mechanical type falls to rub to subtract turns round pipe nipple Download PDFInfo
- Publication number
- CN204386496U CN204386496U CN201420803697.1U CN201420803697U CN204386496U CN 204386496 U CN204386496 U CN 204386496U CN 201420803697 U CN201420803697 U CN 201420803697U CN 204386496 U CN204386496 U CN 204386496U
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- CN
- China
- Prior art keywords
- overcoat
- rub
- mechanical type
- pipe nipple
- round pipe
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of mechanical type and falls to rub to subtract and turn round pipe nipple, belongs to technical field under oil well.This mechanical type falls to rub to subtract to be turned round pipe nipple and comprises central tube, overcoat, roller shaft and roller.The appearance of central tube is circumferentially provided with groove, is movably installed with overcoat in groove by sealing shroud and cylindrical roller, overcoat two ends be circumferentially evenly equipped with fitting recess, by roller shaft, roller is installed in fitting recess.This mechanical type falls to rub and subtracts that to turn round pipe nipple structure simple, easy to install, effectively can reduce drilling rod and sleeve friction and the drag and torque produced, and have that abrasion resistance is high, intensity good, the feature of safe and reliable, long service life, can meet high angle hole, demand that long horizontal sections horizontal well creeps into completely.
Description
Technical field
The utility model relates to a kind of mechanical type and falls to rub to subtract and turn round pipe nipple, belongs to technical field under oil well.
Background technology
In recent years in petroleum drilling and mining field, the application of high angle hole, long horizontal sections horizontal well is increasing, due to the impact of the large frictional resistance of long horizontal sections, cause in long horizontal sections drilling process, drilling rod and sleeve friction and the drag and torque produced, when causing making a trip, blocked portion phenomenon is frequent, and cause load transfer to be obstructed, rate of penetration is lower.The method of current reduction drag and torque installs to fall to rub to subtract the instrument of turning round between drill string joint, subtracts the friction of the instrument of turning round, thus reduce frictional resistance the friction between tool joint and sleeve pipe be converted to drilling rod and fall to rub.Existing fall to rub subtract the instrument of turning round and be roughly divided into import and domestic two kinds, although import instrument is effective, but there is expensive, limited with the supporting scope of application of domestic drilling deficiency, although domestic instrument cost is low, but limited efficiency, can not meet the demand of application of high angle hole, long horizontal sections horizontal well completely.
Summary of the invention
The purpose of this utility model is: provide a kind of structure simple, easy to install, effectively can reduce drilling rod and sleeve friction and the drag and torque produced, and have that abrasion resistance is high, intensity good, safe and reliable, long service life feature, can meet high angle hole completely, mechanical type that long horizontal sections horizontal well creeps into demand falls to rub to subtract and turn round pipe nipple.
The technical solution of the utility model is:
A kind of mechanical type falls to rub to subtract turns round pipe nipple, comprise central tube, overcoat, roller shaft and roller, it is characterized in that: the appearance of central tube is circumferentially provided with groove, overcoat is movably installed with by sealing shroud and cylindrical roller in groove, overcoat two ends be circumferentially evenly equipped with fitting recess, by roller shaft, roller is installed in fitting recess.
Described overcoat is made up of overcoat A and overcoat B, is connected and fixed between overcoat A and overcoat B by locking bearing pin.
Arrange in dislocation shape between the fitting recess at described overcoat two ends.
Be provided with internal thread in the port of described central tube one end, the appearance of the port side of the central tube other end is circumferentially provided with external screw thread.
The beneficial effects of the utility model are:
1, achieve simultaneously move axially and circumference rotate frictional resistance function is fallen.
2, the bearing arrangement that rotates circumference of sealing shroud and the external world have carried out maximum isolation, extend the life-span of bearing arrangement.
3, consumable accessory can need not unload and detain replacing on rig floor, and changes conveniently.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model,
Fig. 2 be Figure 1A-A to section structure schematic diagram;
Fig. 3 be Figure 1B-B to section structure schematic diagram.
In figure: 1, central tube, 2, overcoat, 3, roller shaft, 4, roller, 5, sealing shroud, 6, cylindrical roller, 7, overcoat A, 8, overcoat B, 9, locking bearing pin, 10, internal thread, 11, external screw thread.
Detailed description of the invention
This mechanical type falls to rub to subtract to be turned round pipe nipple and comprises central tube 1, overcoat 2, roller shaft 3 and roller 4.The appearance of central tube 1 is circumferentially provided with groove, is movably installed with overcoat 2 in groove by sealing shroud 5 and cylindrical roller 6.Overcoat 2 is made up of Semicircular overcoat A7 and overcoat B8, is connected and fixed between overcoat A7 and overcoat B8 by locking bearing pin 9.
Overcoat 2 two ends be circumferentially evenly equipped with fitting recess, arrange in dislocation shape mutually between the fitting recess at overcoat two ends; By roller shaft 3, roller 4 is installed in fitting recess.
This mechanical type falls in the port that rubs and subtract central tube 1 one end turning round pipe nipple and is provided with internal thread 10, and the appearance of the port side of central tube 1 other end is circumferentially provided with external screw thread 11.
This mechanical type fall rub subtract turn round pipe nipple work time, be connected with drill pipe coupling by the screw thread on central tube 1, then go into the well with drill string, in the axial direction, the slip that the roller 4 be circumferentially evenly arranged by overcoat 2 makes drill string in pit shaft becomes rolling, thus reduces frictional resistance; Relatively rotated by cylindrical roller 6 between overcoat 2 and central tube 1 when drilling rod rotates, the motion of the skid of cylindrical roller 6 can reduce frictional resistance during rotation, thus can reduce drilling rod rotate needed for moment of torsion.And because the envelope diameter of circumferential upper roller 4 is slightly larger than drill pipe coupling, also mitigate the wearing and tearing of drill pipe coupling so simultaneously.Sealing shroud 5 can be prevented and treated mud, drilling etc. and enter cylindrical roller 6 and cause runway, plays a sealing function.
Use after a period of time, when sealing shroud 5 there is serious wear, produce obvious gap time, can just it not changed by dismounting overcoat 2.
This mechanical type falls to rub and subtracts that to turn round pipe nipple structure simple, easy to install, effectively can reduce drilling rod and sleeve friction and the drag and torque produced, and have that abrasion resistance is high, intensity good, the feature of safe and reliable, long service life, can meet high angle hole, demand that long horizontal sections horizontal well creeps into completely.
Embodiment described in the utility model is only the description carried out preferred embodiment of the present utility model; not the utility model design and scope are limited; under the prerequisite not departing from the utility model design philosophy; the various distortion that in this area, engineers and technicians make the technical solution of the utility model and improvement; protection domain of the present utility model all should be fallen into; the technology contents of the utility model request protection, all records in detail in the claims.
Claims (4)
1. a mechanical type falls to rub to subtract and turns round pipe nipple, comprise central tube (1), overcoat (2), roller shaft (3) and roller (4), it is characterized in that: the appearance of central tube (1) is circumferentially provided with groove, overcoat (2) is movably installed with by sealing shroud (5) and cylindrical roller (6) in groove, overcoat (2) two ends be circumferentially evenly equipped with fitting recess, by roller shaft (3), roller (4) is installed in fitting recess.
2. a kind of mechanical type according to claim 1 falls to rub to subtract and turns round pipe nipple, it is characterized in that: described overcoat (2) is by overcoat A(7) and overcoat B(8) form, overcoat A(7) and overcoat B(8) between by locking bearing pin (9) be connected and fixed.
3. a kind of mechanical type according to claim 1 falls to rub to subtract and turns round pipe nipple, it is characterized in that: arrange in dislocation shape between the fitting recess at described overcoat (2) two ends.
4. a kind of mechanical type according to claim 1 falls to rub to subtract and turns round pipe nipple, it is characterized in that: be provided with internal thread (10) in the port of described central tube (1) one end, the appearance of the port side of central tube (1) other end is circumferentially provided with external screw thread (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803697.1U CN204386496U (en) | 2014-12-18 | 2014-12-18 | A kind of mechanical type falls to rub to subtract turns round pipe nipple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420803697.1U CN204386496U (en) | 2014-12-18 | 2014-12-18 | A kind of mechanical type falls to rub to subtract turns round pipe nipple |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204386496U true CN204386496U (en) | 2015-06-10 |
Family
ID=53359227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420803697.1U Expired - Fee Related CN204386496U (en) | 2014-12-18 | 2014-12-18 | A kind of mechanical type falls to rub to subtract turns round pipe nipple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204386496U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604484A (en) * | 2015-12-31 | 2016-05-25 | 燕山大学 | Drag-reducing and torque-reducing device |
| CN106907115A (en) * | 2017-05-04 | 2017-06-30 | 西南石油大学 | A kind of roller type antifriction pipe nipple |
| CN108915614A (en) * | 2018-08-01 | 2018-11-30 | 成都市众思诚科技有限公司 | A kind of resistance absorber |
-
2014
- 2014-12-18 CN CN201420803697.1U patent/CN204386496U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604484A (en) * | 2015-12-31 | 2016-05-25 | 燕山大学 | Drag-reducing and torque-reducing device |
| CN106907115A (en) * | 2017-05-04 | 2017-06-30 | 西南石油大学 | A kind of roller type antifriction pipe nipple |
| CN108915614A (en) * | 2018-08-01 | 2018-11-30 | 成都市众思诚科技有限公司 | A kind of resistance absorber |
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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 |
Granted publication date: 20150610 Termination date: 20151218 |
|
| EXPY | Termination of patent right or utility model |