CN108798552A - A kind of pulley-type array induction centralizer - Google Patents
A kind of pulley-type array induction centralizer Download PDFInfo
- Publication number
- CN108798552A CN108798552A CN201810575777.9A CN201810575777A CN108798552A CN 108798552 A CN108798552 A CN 108798552A CN 201810575777 A CN201810575777 A CN 201810575777A CN 108798552 A CN108798552 A CN 108798552A
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- China
- Prior art keywords
- centralizer
- main shaft
- pulley
- support arms
- support arm
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- Pending
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- 230000006698 induction Effects 0.000 title claims abstract description 25
- 238000007789 sealing Methods 0.000 claims description 14
- 239000003129 oil well Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 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
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- 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 a kind of centralizers, in particular it is a kind of pulley-type array induction centralizer, including centralizer main shaft, two slip rings, multiple thimbles, multiple left support arms, multiple right support arms, multiple pulleys and two sliding sleeves, the left support arm is identical as right support arm structure, lower end on the outside of the right support arm is fixedly connected with eccentric projection, the left and right ends of centralizer main shaft are slidably connected a slip ring and a sliding sleeve respectively, the slip ring is slidably connected in sliding sleeve, multiple thimbles are fixedly connected on the slip ring, the left end of multiple left support arms is hingedly connected on the sliding sleeve of left end, the right end of multiple right support arms is hingedly connected on the sliding sleeve of right end, the right end of multiple left support arms is hinged by articulated shaft with the left end of multiple right support arms respectively, multiple pulleys are rotatably connected on respectively on the articulated shaft between multiple left support arms and multiple right support arms.There is the present invention splendid radial dimension to change performance, is applicable to the larger oil well well logging of radial dimension amplitude of variation and uses.
Description
Technical field
The present invention relates to a kind of centralizers, are in particular a kind of pulley-type array induction centralizers.
Background technology
Such as a kind of centralizer that number of patent application is CN201220481324.8, including centralizer connector, centralizer master
Axis, shrapnel fixing nut, locking nut and at least two panels metal clips, the centralizer connector are arranged the one of the centralizer
The one end at end, the metal clips is fixed on the centralizer main shaft, and the other end is fixed in the shrapnel fixing nut,
The shrapnel fixing nut can be slided along the centralizer main shaft, and the locking nut is for fixing the shrapnel fixing nut.
Centralizer righting diameter in the utility model is adjustable, can be suitable for the well of different pore size, can ensure test device or
The position of plumbing installation is placed in the middle, improves righting effect to the maximum extent, to improve the accuracy of test or provide
Good fluid channel.But radial dimension can not be contracted to metal clips and centralizer axis parastate by the centralizer,
And the frictional force between centralizer and the borehole wall can not be reduced.
Invention content
The object of the present invention is to provide a kind of pulley-type array induction centralizers, and centralizer can both have been made to be located at borehole wall axis
Position, and the frictional force between centralizer and the borehole wall can be reduced；Multiple left support arms and multiple right support arms can rotate to help
The axis of positive device main shaft is parallel, and to make centralizer have minimum radial dimension, therefore the present invention has splendid radial ruler
Very little variation performance is applicable to the larger oil well well logging of radial dimension amplitude of variation and uses.
The purpose of the present invention is achieved through the following technical solutions：
A kind of pulley-type array induction centralizer, including centralizer main shaft, two slip rings, multiple thimbles, multiple left support arms,
Multiple right support arms, multiple pulleys and two sliding sleeves, the left support arm is identical as right support arm structure, the lower end on the outside of the right support arm
It is fixedly connected with eccentric projection, the left and right ends of centralizer main shaft are slidably connected a slip ring and a sliding sleeve respectively, the cunning
Ring is slidably connected in sliding sleeve, and multiple thimbles are fixedly connected on the slip ring, and the left end of multiple left support arms is hingedly connected to
On the sliding sleeve of left end, the right end of multiple right support arms is hingedly connected on the sliding sleeve of right end, the right ends of multiple left support arms respectively with it is more
The left end of a right support arm is hinged by articulated shaft, and pulley is rotatably connected between the left support arm and right support arm that are connected.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
The left and right ends of main shaft are slidably connected a spring press-cover respectively, and two spring press-covers pass through screw-thread fit with two sliding sleeves respectively
Connection, the left and right ends of the centralizer main shaft are socketed a spring respectively, and the spring is between spring press-cover and slip ring.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
The middle-end of main shaft is provided with multiple pulley grooves, and multiple pulleys distinguish clearance fit in multiple pulley grooves.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
Multiple circumferential limiting slots are provided on main shaft, multiple circumferential direction limiting slots are uniformly distributed along centralizer main shaft circumferencial direction, Duo Gezhou
It is located at the left and right ends of pulley groove, multiple circumferential limiting slots of multiple eccentric projection difference clearance fits in right end to limiting slot
It is interior.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
The left end of main shaft connects left swivel nut by screw-thread fit, and the left end of the left swivel nut connects left end cap by screw-thread fit.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
The right end of main shaft connects right swivel nut by screw-thread fit, and the right end of the right swivel nut connects right end cap by screw-thread fit.
As advanced optimizing for the technical program, a kind of pulley-type array induction centralizer of the present invention, the centralizer
Main shaft is the tubular structure of internal hollow out, and sealing ring, the centralizer master are provided between the centralizer main shaft and left swivel nut
It is provided with sealing ring between axis and right swivel nut, sealing ring, the right swivel nut and the right side are provided between the left swivel nut and left end cap
Sealing ring is provided between end cap.
A kind of pulley-type array induction centralizer of the invention has the beneficial effect that：
A kind of pulley-type array induction centralizer of the present invention, is contacted with the borehole wall by multiple pulleys, can both make centralizer
Positioned at borehole wall location mid-shaft, and the frictional force between centralizer and the borehole wall can be reduced；Multiple left support arms and multiple right support arms
Extremely parallel with the axis of centralizer main shaft with rotation, to make centralizer have minimum radial dimension, therefore the present invention has
Splendid radial dimension changes performance, is applicable to the larger oil well well logging of radial dimension amplitude of variation and uses.
Description of the drawings
The present invention will be further described in detail with specific implementation method below in conjunction with the accompanying drawings.
Fig. 1 is the overall structure diagram one of the present invention；
Fig. 2 is the centralizer main axle structure half-section diagram of the present invention；
Fig. 3 is the centralizer main axle structure schematic diagram of the present invention；
Fig. 4 is the right support arm structure schematic diagram one of the present invention；
Fig. 5 is the right support arm structure schematic diagram two of the present invention；
Fig. 6 is the overall structure diagram two of the present invention.
In figure：Centralizer main shaft 1；Pulley groove 1-1；Circumferential limiting slot 1-2；Slip ring 2；Thimble 3；Left support arm 4；Right support arm 5；
Eccentric projection 5-1；Pulley 6；Sliding sleeve 7；Spring press-cover 8；Spring 9；Left swivel nut 10；Left end cap 11；Right swivel nut 12；Right end cap 13.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings.
Specific implementation mode one：
Illustrate present embodiment, a kind of pulley-type array induction centralizer, including righting with reference to Fig. 1,2,3,4,5,6
1, two slip ring 2 of device main shaft, multiple thimbles 3, multiple left support arms 4, multiple right support arms 5, multiple pulleys 6 and two sliding sleeves 7, it is described
Left support arm 4 is identical as 5 structure of right support arm, and the lower end in 5 outside of the right support arm is fixedly connected with eccentric projection 5-1, centralizer master
The left and right ends of axis 1 are slidably connected a slip ring 2 and a sliding sleeve 7 respectively, and the slip ring 2 is slidably connected in sliding sleeve 7, described
Multiple thimbles 3 are fixedly connected on slip ring 2, the left end of multiple left support arms 4 is hingedly connected on the sliding sleeve 7 of left end, multiple right sides
The right end of support arm 5 is hingedly connected on the sliding sleeve 7 of right end, and the right end of multiple left support arms 4 is logical with the left end of multiple right support arms 5 respectively
It is hinged to cross articulated shaft, multiple pulleys 6 are rotatably connected on respectively on the articulated shaft between multiple left support arms 4 and multiple right support arms 5；Make
Used time, two sliding sleeves 7 are slided along centralizer main shaft 1 to middle-end, and two sliding sleeves 7 push two multiple left support arms 4 and multiple right branch
Arm 5 makes multiple left support arms 4 and multiple 5 hinged places of right support arm be moved to 1 radially enlarged direction of centralizer main shaft, multiple to make
6 place circle diameter of pulley increases；It is contacted with the borehole wall by multiple pulleys 6, when pulley-type array induction centralizer is along the borehole wall
Multiple pulleys 6 rotate therewith when lower slider, play the role of reducing friction；Meanwhile making to help under the supporting role of multiple pulleys 6
Positive device main shaft 1 is located at center in well, and centralizer main shaft 1 is not contacted with the borehole wall, avoids centralizer main shaft 1 from being generated with the borehole wall and knocks
It touches or clamping stagnation；When borehole wall diameter is smaller, under the squeezing action of multiple pulleys 6, multiple left support arms 4 and the rotation of multiple right support arms 5
The axis parastate with centralizer main shaft 1 is gone to, realizing centralizer radial dimension with this minimizes, and centralizer is made to be suitable for
The smaller logging operation of well head diameter has splendid radial variations performance；When the increase of borehole wall diameter, by pushing two to middle-end
A slip ring 2, two slip rings 2 push multiple thimbles 3 to middle end motion respectively, and thimble 3 pushes eccentric projection 5-1, to make right branch
Arm 5 rotates, and the outside side oscillation of middle-end of right support arm 5, left support arm 4 becomes middle-end from the axis parastate with centralizer main shaft 1
Open configuration and right support arm 5 be similarly outward.
Specific implementation mode two：
Illustrate that present embodiment, present embodiment make furtherly embodiment one with reference to Fig. 1,2,3,4,5,6
Bright, the left and right ends of the centralizer main shaft 1 are slidably connected a spring press-cover 8 respectively, two spring press-covers 8 respectively with two
Sliding sleeve 7 is connected by screw-thread fit, and the left and right ends of the centralizer main shaft 1 are socketed a spring 9,9, the spring respectively
Between spring press-cover 8 and slip ring 2；In use, the both ends of centralizer main shaft 1 are equipped with logging equipment, logging equipment is to middle-end
Elasticity squeezes two spring press-covers 8, and spring 9 remains compressive state between spring press-cover 8 and slip ring 2, and spring 9, which pushes, to be slided
Ring 2, slip ring 2 pushes eccentric projection 5-1 by thimble 3, to make the middle-end of right support arm 5 have the tendency that opening outward, with this
When right support arm 5 is parallel with the axis of centralizer main shaft 1, the middle-end of right support arm 5 can still open outward, the movement of left support arm 4
Similarly with right support arm 5.
Specific implementation mode three：
Illustrate that present embodiment, present embodiment make furtherly embodiment one with reference to Fig. 1,2,3,4,5,6
Bright, the middle-end of the centralizer main shaft 1 is provided with multiple pulley groove 1-1, and when borehole wall ID is smaller, multiple left support arms more than 4 are right
When support arm 5 is parallel with the axis of centralizer main shaft 1, multiple pulleys 6 distinguish clearance fit in multiple pulley groove 1-1, with this
Keep the radial dimension of centralizer minimum.
Specific implementation mode four：
Illustrate that present embodiment, present embodiment make furtherly embodiment three with reference to Fig. 1,2,3,4,5,6
It is bright, it is provided with multiple circumferential direction limiting slot 1-2, multiple circumferential direction limiting slot 1-2 on the centralizer main shaft 1 and justifies along centralizer main shaft 1
Circumferential direction is uniformly distributed, and multiple circumferential direction limiting slot 1-2 are located at the left and right ends of pulley groove 1-1, between multiple eccentric projection 5-1 distinguish
Gap coordinates in multiple circumferential limiting slot 1-2 of right end, and eccentric projection 5-1 slidings limit multiple in circumferential limiting slot 1-2
The rotation of left support arm 4, multiple right support arms 5 and multiple pulleys 6 on centralizer main shaft 1；3 clearance fit of multiple thimbles is in week simultaneously
Into limiting slot 1-2, the rotation of slip ring 2 and thimble 3 on centralizer main shaft 1 is limited.
Specific implementation mode five：
Illustrate that present embodiment, present embodiment make furtherly embodiment one with reference to Fig. 1,2,3,4,5,6
Bright, the left end of the centralizer main shaft 1 connects left swivel nut 10 by screw-thread fit, and the left end of the left swivel nut 10 is matched by screw thread
Close connection left end cap 11；The right end of the centralizer main shaft 1 connects right swivel nut 12, the right side of the right swivel nut 12 by screw-thread fit
End connects right end cap 13 by screw-thread fit；The centralizer main shaft 1 is the tubular structure of internal hollow out, the centralizer main shaft
It is provided with sealing ring between 1 and left swivel nut 10, sealing ring, the left side are provided between the centralizer main shaft 1 and right swivel nut 12
It is provided with sealing ring between swivel nut 10 and left end cap 11, sealing ring is provided between the right swivel nut 12 and right end cap 13；Righting
The inside of device main shaft 1 is ensured the inner sealing of centralizer main shaft 1 by sealing ring, avoided outer for installing accurate logger
Boundary's dirt enters corrosion logger；Right end cap 13 and left end cap 11 are used to connect other underground equipments, are made by centralizer
Underground equipment is integrally located at borehole wall location mid-shaft, and logging equipment is avoided to be contacted with the borehole wall.
A kind of pulley-type array induction centralizer of the present invention, its working principle is that：In use, two sliding sleeves 7 are along righting
Device main shaft 1 is slided to middle-end, and two sliding sleeves 7 push two multiple left support arms 4 and multiple right support arms 5, makes multiple left support arms 4 and more
A 5 hinged place of right support arm is moved to 1 radially enlarged direction of centralizer main shaft, to make 6 place circle diameter of multiple pulleys increase；
It is contacted with the borehole wall by multiple pulleys 6, when pulley-type array induction centralizer is slided up and down along the borehole wall, multiple pulleys 6 turn therewith
It is dynamic, play the role of reducing friction；Meanwhile centralizer main shaft 1 being made to be located at centre bit in well under the supporting role of multiple pulleys 6
It sets, centralizer main shaft 1 is not contacted with the borehole wall, avoids centralizer main shaft 1 and borehole wall generation is collided with or clamping stagnation；When borehole wall diameter is smaller
When, under the squeezing action of multiple pulleys 6, the axis of multiple left support arms 4 and the rotation of multiple right support arms 5 extremely with centralizer main shaft 1
Parastate realizes centralizer radial dimension with this and minimizes, centralizer is made to be suitable for the smaller logging operation of well head diameter,
With splendid radial variations performance；When borehole wall diameter increases, by pushing two slip rings 2 to middle-end, two slip rings 2 push away respectively
Dynamic multiple thimbles 3 push eccentric projection 5-1 to middle end motion, thimble 3, to make right support arm 5 rotate, the middle-end of right support arm 5 to
Outer side oscillation, left support arm 4 become middle-end open configuration and right support arm 5 outward from the axis parastate with centralizer main shaft 1
Similarly；The both ends of centralizer main shaft 1 are equipped with logging equipment, and logging equipment squeezes two spring press-covers 8, spring to middle-end elasticity
9 remain that compressive state, spring 9 push slip ring 2, slip ring 2 to push bias by thimble 3 between spring press-cover 8 and slip ring 2
Convex block 5-1 works as the axis of right support arm 5 and centralizer main shaft 1 with this to make the middle-end of right support arm 5 have the tendency that opening outward
When line is parallel, the middle-end of right support arm 5 can still open outward, and the movement of left support arm 4 and right support arm 5 are similarly；When borehole wall ID compared with
Small, when more than 4 right support arms 5 of multiple left support arms are parallel with the axis of centralizer main shaft 1, multiple pulleys 6 distinguish clearance fit and exist
In multiple pulley groove 1-1, keep the radial dimension of centralizer minimum with this；Multiple eccentric projection 5-1 distinguish clearance fit in right end
Multiple circumferential limiting slot 1-2 in, eccentric projection 5-1 slidings limit multiple left support arms 4, multiple in circumferential limiting slot 1-2
The rotation of right support arm 5 and multiple pulleys 6 on centralizer main shaft 1；3 clearance fit of multiple thimbles is in circumferential limiting slot 1-2 simultaneously
It is interior, limit the rotation of slip ring 2 and thimble 3 on centralizer main shaft 1.
Certainly, above description is not limitation of the present invention, and the present invention is also not limited to the example above, the art
The variations, modifications, additions or substitutions that those of ordinary skill is made in the essential scope of the present invention also belong to the guarantor of the present invention
Protect range.
Claims (7)
1. a kind of pulley-type array induction centralizer, including it is centralizer main shaft (1), two slip rings (2), multiple thimbles (3), multiple
Left support arm (4), multiple right support arms (5), multiple pulleys (6) and two sliding sleeves (7), it is characterised in that：The left support arm (4) and the right side
Support arm (5) structure is identical, and the lower end on the outside of the right support arm (5) is fixedly connected with eccentric projection (5-1), centralizer main shaft (1)
Left and right ends be slidably connected respectively a slip ring (2) and a sliding sleeve (7), the slip ring (2) is slidably connected at sliding sleeve (7)
It is interior, multiple thimbles (3) are fixedly connected on the slip ring (2), the left end of multiple left support arms (4) is hingedly connected to the cunning of left end
It covers on (7), the right end of multiple right support arms (5) is hingedly connected on the sliding sleeve (7) of right end, the right end difference of multiple left support arms (4)
It is hinged by articulated shaft with the left end of multiple right support arms (5), it is rotatablely connected between the left support arm (4) being connected and right support arm (5)
There is pulley (6).
2. a kind of pulley-type array induction centralizer according to claim 1, it is characterised in that：The centralizer main shaft
(1) left and right ends are slidably connected a spring press-cover (8) respectively, and two spring press-covers (8) pass through with two sliding sleeves (7) respectively
Screw-thread fit connects, and the left and right ends of the centralizer main shaft (1) are socketed a spring (9) respectively, and the spring (9) is located at bullet
Between spring pressing sleeve (8) and slip ring (2).
3. a kind of pulley-type array induction centralizer according to claim 1, it is characterised in that：The centralizer main shaft
(1) middle-end is provided with multiple pulley grooves (1-1), and clearance fit is interior in multiple pulley grooves (1-1) respectively for multiple pulleys (6).
4. a kind of pulley-type array induction centralizer according to claim 3, it is characterised in that：The centralizer main shaft
(1) multiple circumferential limiting slots (1-2) are provided on, multiple circumferential direction limiting slots (1-2) are uniform along centralizer main shaft (1) circumferencial direction
Distribution, multiple circumferential direction limiting slots (1-2) are located at the left and right ends of pulley groove (1-1), multiple eccentric projections (5-1) and right end it is more
Clearance fit is interior in multiple circumferential limiting slots (1-2) of right end respectively for a thimble (3).
5. a kind of pulley-type array induction centralizer according to claim 1, it is characterised in that：The centralizer main shaft
(1) left end connects left swivel nut (10) by screw-thread fit, and the left end of the left swivel nut (10) connects left end by screw-thread fit
Cap (11).
6. a kind of pulley-type array induction centralizer according to claim 5, it is characterised in that：The centralizer main shaft
(1) right end connects right swivel nut (12) by screw-thread fit, and the right end of the right swivel nut (12) connects right end by screw-thread fit
Cap (13).
7. a kind of pulley-type array induction centralizer according to claim 6, it is characterised in that：The centralizer main shaft
(1) it is the tubular structure of internal hollow out, sealing ring is provided between the centralizer main shaft (1) and left swivel nut (10), it is described to help
It is just provided with sealing ring between device main shaft (1) and right swivel nut (12), is provided between the left swivel nut (10) and left end cap (11)
Sealing ring is provided with sealing ring between the right swivel nut (12) and right end cap (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575777.9A CN108798552A (en) | 2018-06-06 | 2018-06-06 | A kind of pulley-type array induction centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810575777.9A CN108798552A (en) | 2018-06-06 | 2018-06-06 | A kind of pulley-type array induction centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108798552A true CN108798552A (en) | 2018-11-13 |
Family
ID=64087173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810575777.9A Pending CN108798552A (en) | 2018-06-06 | 2018-06-06 | A kind of pulley-type array induction centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108798552A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096310A (en) * | 2020-11-09 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Hydraulic casing centralizer for oil exploitation |
| CN112814622A (en) * | 2021-01-25 | 2021-05-18 | 西南石油大学 | Device for carrying out mixed descaling and corrosion degree detection on oil and gas well and application method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1281834A1 (en) * | 2001-08-03 | 2003-02-05 | Schlumberger Technology B.V. | BI-Directional grip mechanism for a wide range of bore sizes |
| CN2809192Y (en) * | 2005-05-11 | 2006-08-23 | 大庆石油管理局 | Eight-arm roller centralizer |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201891392U (en) * | 2010-12-09 | 2011-07-06 | 西安威盛电子仪器有限公司 | Four-arm and dual-roller centralizer |
| CN206418975U (en) * | 2017-01-10 | 2017-08-18 | 北京华航无线电测量研究所 | A kind of compact rolling wheel centralizer |
-
2018
- 2018-06-06 CN CN201810575777.9A patent/CN108798552A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1281834A1 (en) * | 2001-08-03 | 2003-02-05 | Schlumberger Technology B.V. | BI-Directional grip mechanism for a wide range of bore sizes |
| CN2809192Y (en) * | 2005-05-11 | 2006-08-23 | 大庆石油管理局 | Eight-arm roller centralizer |
| CN201391245Y (en) * | 2009-04-17 | 2010-01-27 | 中国石油天然气集团公司 | Underground logging centralizer |
| CN201891392U (en) * | 2010-12-09 | 2011-07-06 | 西安威盛电子仪器有限公司 | Four-arm and dual-roller centralizer |
| CN206418975U (en) * | 2017-01-10 | 2017-08-18 | 北京华航无线电测量研究所 | A kind of compact rolling wheel centralizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096310A (en) * | 2020-11-09 | 2020-12-18 | 胜利油田固邦石油装备有限责任公司 | Hydraulic casing centralizer for oil exploitation |
| CN112814622A (en) * | 2021-01-25 | 2021-05-18 | 西南石油大学 | Device for carrying out mixed descaling and corrosion degree detection on oil and gas well and application method thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181113 |
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