CN108374642A - Hydraulic reducing centralizer based on rolling screw - Google Patents
Hydraulic reducing centralizer based on rolling screw Download PDFInfo
- Publication number
- CN108374642A CN108374642A CN201810218419.2A CN201810218419A CN108374642A CN 108374642 A CN108374642 A CN 108374642A CN 201810218419 A CN201810218419 A CN 201810218419A CN 108374642 A CN108374642 A CN 108374642A
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- CN
- China
- Prior art keywords
- rear end
- seal ring
- pipe nipple
- dynamic seal
- packed
- 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.)
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Links
- 238000005096 rolling process Methods 0.000 title claims abstract description 29
- 210000002445 nipple Anatomy 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000008602 contraction Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000008569 process Effects 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000005086 pumping Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention relates to the hydraulic reducing centralizers based on rolling screw, including top assembly, diameter changing mechanism, lower part assembly, install top assembly in diameter changing mechanism rear end, lower part assembly is installed in front end.When drilling fluid is not pressurized, diameter changing mechanism is in contraction state, after turn on pump pressurizes, cleaner for high-pressure drilling fluid enters by top connection, upper pipe nipple, water conservancy diversion pipe nipple, channel envelope, the vessel that upper shell is combined into, channel envelope is pushed to travel forward, spring-compressed shortens, pass through channel envelope and roller a, the threaded engagement of helical axis, helical axis rotary motion, drive sun gear mandrel rotary motion, drive diameter changing mechanism stretching, extension, after termination of pumping is depressurized, hold cavity pressure to reduce, spring extends, channel envelope is pushed to move backward, helical axis reverse rotation motion, drive sun gear mandrel reverse rotation motion, diameter changing mechanism is driven to shrink.The present invention can solve the problems, such as that reducing centralizer startup power is big in drilling process, reducing range is small, improve drilling quality.
Description
Technical field
The present invention relates to a kind of underground tools for oil drilling, and in particular to the hydraulic reducing based on rolling screw is helped
Positive device.
Background technology
With the development of petroleum industry, directional well drilling and horizontal well drilling technology obtain in oil exploitation Exploration Domain
Greatly promote and apply.But in directional well and Horizontal Well Drilling well operations, due to drilling rod dead weight and the phase of drill bit and ground interlayer
Interaction etc., it is easy to make drill string glance off, drill string is difficult placed in the middle, seriously affects the quality of drilling well.Conventional centralizer
Wiper block diameter cannot change, and righting precision is not high, limited to improving the effect of drill string centralizer, and it is more complete to expand well section in the borehole wall
Centralizing function is not had.
In drilling process, it should accurately and effectively control well track as possible, improve rate of penetration, reduce drilling well at
This.The wellbore quantity of directional well and horizontal well is more and more, and oil field is badly in need of that a variety of well sections can be suitable in drilling process, carries
High drill string centralizer improves the centralizer of well-drilling borehole quality.Diameter-changing centering guide increasingly becomes the crucial work in drilling process
Tool, but the reducing centralizer startup power that part can be started with underground at present is big, cannot achieve a grade reducing, there are certain limitations
Property.Based on this, the present invention provides the hydraulic reducing centralizers based on rolling screw.
Invention content
The purpose of the invention is to provide the hydraulic reducing centralizers based on rolling screw, and reducing model is controlled by pump pressure
It encloses, with solution, reducing centralizer startup power is big in drilling process, the small problem of reducing range.
The technical scheme is that：Hydraulic reducing centralizer based on rolling screw include top assembly, diameter changing mechanism,
Lower part assembly installs top assembly in diameter changing mechanism rear end, and lower part assembly is installed in front end；The top assembly includes above connecing
Head, dynamic seal ring a, thrust ball bearing a, dynamic seal ring b, upper pipe nipple, O-ring seal a, O-ring seal b, water conservancy diversion pipe nipple, raceway groove
Shell, upper shell, roller a, helical axis（12）, spring, by dynamic seal ring b from top connection rear end be packed into, by dynamic seal ring a, push away
Power ball bearing a successively from upper pipe nipple it is front loaded after be packed into together from top connection rear end, by O-ring seal a, O-ring seal b point
It is not installed in the inside and outside wall groove of channel envelope rear end, roller a is mounted in the raceway groove of channel envelope, by helical axis from raceway groove
Case nose is packed into, and spiral shaft rear end is connected through a screw thread with water conservancy diversion pipe nipple front end, and water conservancy diversion pipe nipple rear end is logical with upper pipe nipple front end
Threaded connection is crossed, spring, channel envelope are packed into from upper shell rear end successively, upper shell rear end passes through screw thread with top connection front end
Connection；The diameter changing mechanism include rolling bearing a, floating seal ring a, middle casing, overhead gage, retainer, dynamic seal ring c,
Dynamic seal ring d, sun gear mandrel, planetary gear, axis pin, short holder, idler wheel, long stent, roller b, round end roller, by dynamic seal ring
C, therefrom housing forward end is packed into together after dynamic seal ring d, planetary gear are packed into from retainer rear end successively, and short holder is installed on row
Roller b, by positive, is installed on the recess of middle casing, by idler wheel by star-wheel front end, short holder front end with planetary gear front end
It is installed on the front end of long stent, the rear end of long stent is packed into from middle casing circumferential direction notch, and so that the rear end of long stent is located at and protects
Round end roller is packed into from the central bore rear end of retainer, and is installed on the rear end of long stent by the central bore for holding frame, will be short
Back-end support is connect with long stent interstitial hole by axis pin, and long stent radial position is then adjusted, and rolling bearing a, floating is close
Seal a, overhead gage successively from sun gear mandrel it is front loaded after be packed into together from retainer rear end, sun gear core back-end and spiral shell
Spin axis front end is connected through a screw thread, and middle casing rear end is connected through a screw thread with upper shell front end；Under the lower part assembly includes
Baffle, floating seal ring b, rolling bearing b, lower housing, lower pipe nipple, dynamic seal ring e, thrust ball bearing b, dynamic seal ring f, under connect
Head is filled from sun gear mandrel front end together after being packed into rolling bearing b, floating seal ring b, lower baffle plate from lower housing rear end successively
Enter, lower housing rear end is connected through a screw thread with middle casing front end, and dynamic seal ring e is front loaded from lower contact, by dynamic seal ring
F, thrust ball bearing b is front loaded from lower contact together after being packed into successively from lower pipe nipple rear end, lower pipe nipple rear end and sun core wheel
Axis front end is connected through a screw thread, and lower contact rear end is connected through a screw thread with lower housing front end.
Upper pipe nipple rear end face, lower pipe nipple front end face in appeal scheme are respectively uniformly distributed 4 holding holes.
Middle casing in appeal scheme is circumferentially evenly arranged 3 notches, and short holder, long stent, middle casing use intensity
High material.
3 notch tip faces that middle casing in appeal scheme is circumferentially evenly arranged respectively are uniformly distributed 3 recesses, installation
Roller b, long stent are point contact with roller b, reduce the friction of long stent during the motion.
It is coated with lubricating grease in channel envelope in appeal scheme, to reduce the friction during worm drive.
After spring in appeal scheme is compressed when diameter changing mechanism is in initial contraction state, channel envelope rear end face is low
Orifice position is opened in water conservancy diversion pipe nipple.
Present invention has the advantages that：（1）The present invention based on the hydraulic reducing centralizer of rolling screw during tripping in,
When drilling fluid is not pressurized, diameter changing mechanism is in contraction state, not will produce axial rub resistance；（2）Startup power is small, channel envelope
Interior spiral groove spiral angle is small, and axial liquid pressure can be converted to great peripheral force, driving diameter changing mechanism movement, support
Long stent is propped up；（3）It after reducing, is locked using lever principle, support force is big；（4）It can be by changing gear pair, spiral second parameter
Reducing range is controlled, realizes multistage effective reducing；（5）Idler wheel can reduce the circumferential frictional resistance of this centralizer.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Vertical view when Fig. 2 is diameter changing mechanism contraction state.
Vertical view when Fig. 3 is diameter changing mechanism extended configuration.
Upward view when Fig. 4 is diameter changing mechanism contraction state.
Upward view when Fig. 5 is diameter changing mechanism extended configuration.
Fig. 6 is the structural schematic diagram of middle casing.
In figure：1- top connections, the upper pipe nipple of 2- dynamic seal rings a, 3- thrust ball bearing a, 4- dynamic seal ring b, 5-, 6-O types are close
Seal a, 7-O type sealing ring b, 8- water conservancy diversion pipe nipple, 9- channel envelopes, 10- upper shells, 11- rollers a, 12- helical axis, 13- bullets
Spring, 14- rolling bearings a, 15- floating seal ring a, 16- middle casing, 17- overhead gages, 18- retainers, 19- dynamic seal rings c, 20-
Dynamic seal ring d, 21- sun gear mandrel, 22- lower baffle plates, 23- floating seal rings b, 24- rolling bearing b, 25- lower housing, under 26-
Pipe nipple, 27- dynamic seal rings e, 28- thrust ball bearing b, 29- dynamic seal ring f, 30- lower contact, 31- planetary gears, 32- axis pins, 33-
Short holder, 34- idler wheels, 35- long stents, 36- rollers b, 37- round end roller.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings.
Referring to attached drawing, the hydraulic reducing centralizer based on rolling screw includes top assembly, diameter changing mechanism, lower part assembly,
Top assembly is installed in diameter changing mechanism rear end, lower part assembly is installed in front end；The top assembly includes top connection 1, dynamic sealing
Enclose a2, thrust ball bearing a3, dynamic seal ring b4, upper pipe nipple 5, O-ring seal a6, O-ring seal b7, water conservancy diversion pipe nipple 8, outside raceway groove
Dynamic seal ring b4 is packed into, by dynamic seal ring by shell 9, upper shell 10, roller a11, helical axis 12, spring 13 from 1 rear end of top connection
A2, thrust ball bearing a3 successively from upper pipe nipple 5 it is front loaded after be packed into together from 1 rear end of top connection, by O-ring seal a6, O-shaped
Sealing ring b7 is respectively arranged in 9 rear end inside and outside wall groove of channel envelope, roller a11 is mounted in the raceway groove of channel envelope 9,
Helical axis 12 is front loaded from channel envelope 9, and 12 rear end of helical axis is connected through a screw thread with 8 front end of water conservancy diversion pipe nipple, and water conservancy diversion is short
It saves 8 rear ends to be connected through a screw thread with 5 front end of upper pipe nipple, spring 13, channel envelope 9 is packed into from 10 rear end of upper shell successively, on
10 rear end of shell is connected through a screw thread with 1 front end of top connection.
The diameter changing mechanism includes rolling bearing a14, floating seal ring a15, middle casing 16, overhead gage 17, retainer
18, dynamic seal ring c19, dynamic seal ring d20, sun gear mandrel 21, planetary gear 31, axis pin 32, short holder 33, idler wheel 34, draw money on credit
Frame 35, roller b36, round end roller 37, by dynamic seal ring c19, dynamic seal ring d20, planetary gear 31 successively from 18 rear end of retainer
Therefrom shell 16 is front loaded together after loading, and short holder 33 is installed on 31 front end of planetary gear, 33 front end of short holder and planet
31 front ends are taken turns by positive, roller b36 are installed on to the recess of middle casing 16, before idler wheel 34 is installed on long stent 35
The rear end of long stent 35 is packed into from the circumferential notch of middle casing 16, and the rear end of long stent 35 is made to be located in retainer 18 by end
Round end roller 37 is packed into from the central bore rear end of retainer 18, and is installed on the rear end of long stent 35 by intracardiac hole, by short branch
33 rear end of frame is connect with 35 interstitial hole of long stent by axis pin 32,35 radial position of long stent is then adjusted, by rolling bearing
A14, floating seal ring a15, overhead gage 17 successively from sun gear mandrel 21 it is front loaded after together from 18 rear end of retainer be packed into,
21 rear end of sun gear mandrel is connected through a screw thread with 12 front end of helical axis, and 16 rear end of middle casing passes through screw thread with 10 front end of upper shell
Connection.
The lower part assembly includes lower baffle plate 22, floating seal ring b23, rolling bearing b24, lower housing 25, lower pipe nipple
26, dynamic seal ring e27, thrust ball bearing b28, dynamic seal ring f29, lower contact 30, by rolling bearing b24, floating seal ring
B23, lower baffle plate 22 successively from 25 rear end of lower housing be packed into after it is front loaded from sun gear mandrel 21 together, 25 rear end of lower housing with
16 front end of middle casing is connected through a screw thread, and dynamic seal ring e27 is front loaded from lower contact 30, by dynamic seal ring f29, thrust ball
Bearing b28 is front loaded from lower contact 30 together after being packed into successively from 26 rear end of lower pipe nipple, lower 26 rear end of pipe nipple and sun core wheel
21 front end of axis is connected through a screw thread, and 30 rear end of lower contact is connected through a screw thread with 25 front end of lower housing.
When drilling fluid is not pressurized, diameter changing mechanism is in contraction state, top connection 1, upper pipe nipple 5, water conservancy diversion pipe nipple 8, outside raceway groove
Shell 9, upper shell 10 are combined into a vessel；After turn on pump pressurizes, cleaner for high-pressure drilling fluid enters top connection 1, upper pipe nipple 5, from leading
The trepanning of stream pipe nipple 8 enters vessel, and channel envelope 9 is pushed to travel forward, and spring 13 is shortened by compression, by channel envelope 9 with
The threaded engagement of roller a11, helical axis 12,12 rotary motion of helical axis drive 21 rotary motion of sun gear mandrel, drive reducing
Mechanism stretches, and after idler wheel 34 touches the borehole wall, 35 front end of long stent is no longer stretched out from the circumferential notch of middle casing 16, reducing machine
Structure locks；After termination of pumping is depressurized, hold cavity pressure and reduce, spring 13 extends, and pushes channel envelope 9 to move backward, helical axis 12
Reverse rotation motion drives 21 reverse rotation motion of sun gear mandrel, driving diameter changing mechanism to shrink.
Claims (6)
1. the hydraulic reducing centralizer based on rolling screw, including top assembly, diameter changing mechanism, lower part assembly, it is characterised in that：
Top assembly is installed in diameter changing mechanism rear end, lower part assembly is installed in front end；The top assembly includes top connection（1）, it is dynamic close
Seal a（2）, thrust ball bearing a（3）, dynamic seal ring b（4）, upper pipe nipple（5）, O-ring seal a（6）, O-ring seal b（7）, lead
Flow pipe nipple（8）, channel envelope（9）, upper shell（10）, roller a（11）, helical axis（12）, spring（13）, by dynamic seal ring b（4）
From top connection（1）Rear end is packed into, by dynamic seal ring a（2）, thrust ball bearing a（3）Successively from upper pipe nipple（5）It is front loaded latter
It rises from top connection（1）Rear end is packed into, by O-ring seal a（6）, O-ring seal b（7）It is respectively arranged in channel envelope（9）Rear end
In inside and outside wall groove, by roller a（11）Mounted on channel envelope（9）Raceway groove in, by helical axis（12）From channel envelope（9）Before
End is packed into, helical axis（12）Rear end and water conservancy diversion pipe nipple（8）Front end is connected through a screw thread, water conservancy diversion pipe nipple（8）Rear end and upper pipe nipple（5）
Front end is connected through a screw thread, by spring（13）, channel envelope（9）Successively from upper shell（10）Rear end is packed into, upper shell（10）Afterwards
End and top connection（1）Front end is connected through a screw thread；The diameter changing mechanism includes rolling bearing a（14）, floating seal ring a
（15）, middle casing（16）, overhead gage（17）, retainer（18）, dynamic seal ring c（19）, dynamic seal ring d（20）, sun gear mandrel
（21）, planetary gear（31）, axis pin（32）, short holder（33）, idler wheel（34）, long stent（35）, roller b（36）, round end roller
（37）, by dynamic seal ring c（19）, dynamic seal ring d（20）, planetary gear（31）Successively from retainer（18）Rear end be packed into after together from
Middle casing（16）It is front loaded, by short holder（33）It is installed on planetary gear（31）Front end, short holder（33）Front end and planetary gear
（31）Front end is by positive, by roller b（36）It is installed on middle casing（16）Recess, by idler wheel（34）It is installed on long stent
（35）Front end, by long stent（35）Rear end from middle casing（16）Circumferential notch is packed into, and makes long stent（35）Rear end position
In retainer（18）Central bore, by round end roller（37）From retainer（18）Central bore rear end be packed into, and be installed on
Long stent（35）Rear end, by short holder（33）Rear end and long stent（35）Interstitial hole passes through axis pin（32）Connection, then adjusts
Long stent（35）Radial position, by rolling bearing a（14）, floating seal ring a（15）, overhead gage（17）Successively from sun gear mandrel
（21）Together from retainer after front loaded（18）Rear end is packed into, sun gear mandrel（21）Rear end and helical axis（12）Front end passes through
It is threadedly coupled, middle casing（16）Rear end and upper shell（10）Front end is connected through a screw thread；The lower part assembly includes lower baffle plate
（22）, floating seal ring b（23）, rolling bearing b（24）, lower housing（25）, lower pipe nipple（26）, dynamic seal ring e（27）, thrust ball
Bearing b（28）, dynamic seal ring f（29）, lower contact（30）, by rolling bearing b（24）, floating seal ring b（23）, lower baffle plate（22）
Successively from lower housing（25）Together from sun gear mandrel after the loading of rear end（21）It is front loaded, lower housing（25）Rear end and middle casing
（16）Front end is connected through a screw thread, by dynamic seal ring e（27）From lower contact（30）It is front loaded, by dynamic seal ring f（29）, thrust
Ball bearing b（28）Successively from lower pipe nipple（26）Together from lower contact after the loading of rear end（30）It is front loaded, lower pipe nipple（26）Rear end
With sun gear mandrel（21）Front end is connected through a screw thread, lower contact（30）Rear end and lower housing（25）Front end is connected through a screw thread.
2. the hydraulic reducing centralizer according to claim 1 based on rolling screw, it is characterised in that：It is upper short for convenience
Section（5）, lower pipe nipple（26）Installation, upper pipe nipple（5）Rear end face, lower pipe nipple（26）Front end face is respectively uniformly distributed 4 holding holes.
3. the hydraulic reducing centralizer according to claim 1 based on rolling screw, it is characterised in that：Middle casing（16）Edge
It is arranged circumferentially 3 notches, short holder（33）, long stent（35）, middle casing（16）Using the high material of intensity.
4. the hydraulic reducing centralizer according to claim 1 based on rolling screw, it is characterised in that：Middle casing（16）Edge
3 notch tip faces being arranged circumferentially respectively are uniformly distributed 3 recesses, installation roller b（31）, long stent（35）With roller b
（36）For point contact, long stent is reduced（35）Friction during the motion.
5. the hydraulic reducing centralizer according to claim 1 based on rolling screw, it is characterised in that：Channel envelope（9）
It is inside coated with lubricating grease, to reduce the friction during worm drive.
6. the hydraulic reducing centralizer according to claim 1 based on rolling screw, it is characterised in that：In drilling process
In, when diameter changing mechanism is in initial contraction state, spring（13）After compressed, channel envelope（9）Rear end face is less than water conservancy diversion
Pipe nipple（8）Open orifice position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218419.2A CN108374642B (en) | 2018-03-16 | 2018-03-16 | Hydraulic reducing centralizer based on rolling spiral |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810218419.2A CN108374642B (en) | 2018-03-16 | 2018-03-16 | Hydraulic reducing centralizer based on rolling spiral |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108374642A true CN108374642A (en) | 2018-08-07 |
| CN108374642B CN108374642B (en) | 2023-07-25 |
Family
ID=63018865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810218419.2A Active CN108374642B (en) | 2018-03-16 | 2018-03-16 | Hydraulic reducing centralizer based on rolling spiral |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108374642B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111691832A (en) * | 2020-07-14 | 2020-09-22 | 中国石油集团渤海钻探工程有限公司 | Rotatable intelligent centralizer |
| CN113958275A (en) * | 2021-12-22 | 2022-01-21 | 东营圭璋海洋科技有限公司 | Casing centralizer for oil exploitation |
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| CN108374642B (en) | 2023-07-25 |
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