CN205743756U - Needle roller spiral centering device - Google Patents
Needle roller spiral centering device Download PDFInfo
- Publication number
- CN205743756U CN205743756U CN201620737271.XU CN201620737271U CN205743756U CN 205743756 U CN205743756 U CN 205743756U CN 201620737271 U CN201620737271 U CN 201620737271U CN 205743756 U CN205743756 U CN 205743756U
- Authority
- CN
- China
- Prior art keywords
- needle roller
- top connection
- transition joint
- urceolus
- thrust bearing
- 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
Links
Abstract
The utility model discloses a kind of needle roller spiral centering device, solve the righting band of existing spiral centering device because of the series of problems the most rotatably caused relative to drill body.Specifically include top connection, thrust bearing assembly, needle roller, transition joint, spiral righting band urceolus and lower contact, upper, middle and lower joint is the most threaded, thrust bearing groove is set in top connection and lower contact, needle roller groove is set in top connection and transition joint, urceolus is enclosed within outside transition joint, and installation thrust bearing is set at urceolus two ends, use needle roller to contact between outer tube inner wall with transition joint and top connection；Can solve the problem that the problem that during inclined shaft or horizontal well creep into, moment of torsion is big, frictional resistance is high, effective pre-preventing sticking, can not use oil-base mud in the construction of horizontal well drilling or use the mud system that oil content is few, greatly reducing construction cost.
Description
Technical field
This utility model relates to the spiral centering device used in a kind of wellbore construction.
Background technology
In wellbore construction, spiral centering device is a kind of vitals, is used for joining various BHA, plays anti-oblique, surely
Tiltedly wait effect, the most essential in the construction in inclined shaft, horizontal well.
The spiral centering device that in prior art, Open-Hole Section is conventional is fixed, say, that righting band is relative to drilling tool originally
Body cannot rotate.Therefore, in drilling process, righting band will rub the borehole wall, thus brings the biggest moment of torsion.Especially
It is in the non-straight well section construction of inclined shaft or horizontal well.Cause in drilling process that moment of torsion is big, top is driven to suppress and stopped or drillling tool twisting off situation
Generation, even cannot complete design well depth to be arrived, cause the serious conditions such as finishing drilling in advance.
Existing casing wear prevention abrasion reducing joint is the most only practically applicable in inclined shaft or horizontal well casing pipe, plays the work of protection sleeve pipe
With, if used at Open-Hole Section, roller is exposed to outside pipe be easy to cause down-hole accident.Proving in practice, drilling tool is at inclined shaft
Or the moment of torsion that horizontal well is in sleeve pipe is the least, prevailing torque produces at Open-Hole Section, therefore controls the moment of torsion of Open-Hole Section
It is crucial.
Big in order to solve Open-Hole Section moment of torsion, the problem that frictional resistance is high.Current method use exactly oil-base mud or
Add environment protection oil etc. in drilling fluid and reduce the frictional force of drilling tool and the borehole wall.But this method not only cost is high, and to environment
Injury is big, is unworthy advocating.
Summary of the invention
For problems of the prior art, this device proposes a kind of needle roller spiral centering device, this needle roller spiral
Centralizer can be with drilling tool generation relative motion, and in the compound drilling of lower curved section or horizontal segment or reaming process, drilling tool rotates,
Spiral righting band is the most motionless relative to shaft bottom.
In order to realize foregoing invention purpose, the technical solution adopted in the utility model is: a kind of needle roller spiral centering device, bag
Include top connection, thrust bearing assembly, needle roller, transition joint, spiral righting band urceolus and lower contact,
Described top connection, its upper and lower two ends are respectively provided with box and pin thread, top connection pin end outer wall arrange thrust
Bearing fit groove and be symmetrical in two top connections radially needle roller grooves of central shaft；
Described transition joint, its upper and lower two ends are respectively provided with box and pin thread, and it is right that transition joint pin end outer wall is arranged
Claim two transition joints radially needle roller groove in central shaft；
Described lower contact, its upper and lower two ends are respectively provided with box and pin thread, top connection box end outer wall arrange lower thrust
Bearing fit groove；
Described spiral righting band urceolus, its outer wall surface is provided with the righting band of rotation direction counterclockwise from top to bottom；
Described top connection, transition joint and lower contact are the most threaded, upper thrust bearing mating groove and under
It is respectively mounted thrust bearing assembly in thrust bearing mating groove, divides in top connection radially needle roller groove and transition joint radially needle roller groove
Not installing needle roller, spiral righting band urceolus is enclosed within outside the needle roller in transition joint and top connection radially needle roller groove, and top connection
Radially needle roller groove and transition joint radially needle roller groove is symmetrical relative to the center of spiral righting band urceolus.
The beneficial effects of the utility model:
1, the moment of torsion of drilling tool can be greatly reduced；
2, during making a trip, spiral righting band urceolus can rotate itself, reduces frictional resistance, has the work of pre-preventing sticking
With；
3, in horizontal well or high angle hole are constructed, this needle roller spiral centering device can also be placed in the drilling rod of Open-Hole Section
On, while reducing moment of torsion, can also pre-antiseized card and differential sticking when directional drilling；
4, when turn on pump not rotation drilling tool, needle roller spiral centering device rotates clockwise, and helps to return on landwaste, has clear well
The effect of eye；
5, this device is applied can not use oil-base mud in the construction of horizontal well drilling or use oil content few
Mud system, is substantially reduced construction cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model needle roller spiral centering device.
Fig. 2 is the structural representation of top connection.
Fig. 3 is the structural representation of transition joint.
Fig. 4 is the structural representation of lower contact.
Fig. 5 is the structural representation of spiral righting band urceolus.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described further:
As shown in Figure 1: a kind of needle roller spiral centering device, including top connection 1, thrust bearing assembly 2, needle roller 3, transition joint
4, spiral righting band urceolus 5 and lower contact 6,
As shown in Figure 2: described top connection 1, its upper and lower two ends are respectively provided with box and pin thread, on top connection pin end outer wall
Thrust bearing mating groove 11 is set and is symmetrical in two top connections radially needle roller groove 12 of central shaft；
As shown in Figure 3: described transition joint 4, its upper and lower two ends are respectively provided with box and pin thread, outside transition joint pin end
Two transition joints radially needle roller groove 41 being symmetrical in central shaft is set on wall；
As shown in Figure 4: described lower contact 6, its upper and lower two ends are respectively provided with box and pin thread, on top connection box end outer wall
Lower thrust bearing mating groove 61 is set；
As shown in Figure 5: described spiral righting band urceolus 5, its outer wall surface is provided with holding up of rotation direction counterclockwise from top to bottom
Just carrying 51；
Described top connection 1, transition joint 4 and lower contact 6 are the most threaded, upper thrust bearing mating groove 11
And in lower thrust bearing mating groove 61, it being respectively mounted thrust bearing assembly 2, top connection radially needle roller groove 12 and transition joint are radially
Being respectively mounted needle roller 3 in needle roller groove 41, spiral righting band urceolus 5 is enclosed within the rolling in transition joint 4 and top connection radially needle roller groove
Outside pin 3, and top connection radially needle roller groove 11 and transition joint radially needle roller groove 41 are relative to the center of spiral righting band urceolus 5
Symmetrically, it is rolling between spiral righting band urceolus 5 inwall dependence needle roller 3 and transition joint 4 and top connection 1 outer wall to connect
Touch.
Why this device uses needle roller to contact, rather than ball contact, it is primarily due to down-hole situation complicated, spiral righting
The radial and axial power that band is born is the hugest, and the linear contact lay of needle roller design has intensity excellent than the point cantact that ball designs
Gesture, so for extension fixture life-span, intensifier intensity, using needle roller design.
This device needle roller spiral centering device, why transition joint uses two needle roller grooves, and with righting band urceolus
Centrosymmetry.Mainly from the point of view of stability.Prevent needle roller eccentric wear, extension fixture life-span.Strengthen outside righting band simultaneously
The shock loading of cylinder tolerance radial force.
Thrust bearing is installed at this device centralizer urceolus two ends, and main cause is to reduce urceolus two ends and upper and lower two joints
Friction, thrust bearing simultaneously, for other bearings, there is less external diameter, bigger contact surface, more can be in intensity
In the case of equal so that the external diameter of block axis bearing outer-ring is less, so as not to affect annular space mud on return, especially on drilling rod
Add much the most this spiral shell when hold up.
The spiral righting band urceolus of this device uses counter-clockwise helical, and reason has two, and one is counter-clockwise helical, and liquid stream exists
When rising in annular space, fluid allows for urceolus to the thrust of urceolus the trend turned clockwise, just with the rotation side of drilling tool
To unanimously, reduce the frictional resistance between them.Two be the wing direction of rotation of PDC drill bit be also clockwise, therefore mud
It is counterclockwise for returning direction on, is also counterclockwise just along the direction returned on the urceolus of centralizer, which reduces fluid
Return resistance on, it also reduce annular pressure lost and the pressure loss.
In sum, the needle roller spiral centering device of the application, it is possible to inclined shaft be obviously reduced or horizontal well creep into during turn round
The problem that square is big, frictional resistance is high, is especially using during non-oil base mud system, and can greatly reduce that moment of torsion brings greatly one is
Row problem, greatly reduces construction cost and decreases the problem of environmental pollution because using oil-base mud to bring.And this righting
There is no movable part outside device cylinder, downhole safety hidden danger will not be manufactured.Needle roller in righting band urceolus and thrust bearing are all by ingeniously
Wonderful is arranged in groove, and is firmly encased by urceolus, has worn and torn and also will not get out outside cylinder.So, it is simple that this device has installation,
Intensity is big, and service life is long, stability advantages of higher.
Claims (1)
1. a needle roller spiral centering device, including top connection, thrust bearing assembly, needle roller, transition joint, spiral righting band urceolus
And lower contact, it is characterised in that:
Described top connection, its upper and lower two ends are respectively provided with box and pin thread, top connection pin end outer wall arrange thrust bearing
Mating groove and be symmetrical in two top connections radially needle roller grooves of central shaft；
Described transition joint, its upper and lower two ends are respectively provided with box and pin thread, transition joint pin end outer wall is arranged and is symmetrical in
Two transition joints of central shaft radially needle roller groove；
Described lower contact, its upper and lower two ends are respectively provided with box and pin thread, top connection box end outer wall arrange lower thrust bearing
Mating groove；
Described spiral righting band urceolus, its outer wall surface is provided with the righting band of rotation direction counterclockwise from top to bottom；
Described top connection, transition joint and lower contact are the most threaded, upper thrust bearing mating groove and lower thrust
It is respectively mounted thrust bearing assembly in bearing fit groove, pacifies respectively in top connection radially needle roller groove and transition joint radially needle roller groove
Dress needle roller, spiral righting band urceolus is enclosed within outside the needle roller in transition joint and top connection radially needle roller groove, and top connection is radially
Needle roller groove and transition joint radially needle roller groove is symmetrical relative to the center of spiral righting band urceolus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737271.XU CN205743756U (en) | 2016-07-13 | 2016-07-13 | Needle roller spiral centering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620737271.XU CN205743756U (en) | 2016-07-13 | 2016-07-13 | Needle roller spiral centering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205743756U true CN205743756U (en) | 2016-11-30 |
Family
ID=57378766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620737271.XU Expired - Fee Related CN205743756U (en) | 2016-07-13 | 2016-07-13 | Needle roller spiral centering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205743756U (en) |
-
2016
- 2016-07-13 CN CN201620737271.XU patent/CN205743756U/en not_active Expired - Fee Related
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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: 20161130 Termination date: 20190713 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |