CN107120073A - Hydraulic casing centralizer - Google Patents
Hydraulic casing centralizer Download PDFInfo
- Publication number
- CN107120073A CN107120073A CN201710241493.1A CN201710241493A CN107120073A CN 107120073 A CN107120073 A CN 107120073A CN 201710241493 A CN201710241493 A CN 201710241493A CN 107120073 A CN107120073 A CN 107120073A
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- China
- Prior art keywords
- wall
- groove
- mandrel
- annular groove
- ring
- 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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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well
Abstract
The present invention relates to oil gas field downhole tool technical field, it is a kind of hydraulic casing centralizer, it includes mandrel, fluid cylinder set, shear pin, helps expanding block and centralizer leaf spring, the top of fluid cylinder set is arranged on the top of mandrel by the first fixation kit, the side wall of mandrel is provided with inlet opening, the second annular chamber and is provided with piston cylinder；The lower end of piston cylinder is provided with piston rod；The lower end of piston rod is arranged on by shear pin on the outer wall of mandrel；The upper end of centralizer leaf spring is fixedly connected by the second fixation kit with the lower end of piston rod；It is fixedly mounted on the middle part outer wall of mandrel and helps expanding block；The lower end of centralizer leaf spring is fixedly mounted on the bottom outer wall of mandrel by the 3rd fixation kit.Compact conformation of the present invention, will not at the moment cause thorn to scrape the borehole wall in lower going-into-well；Sealed using Hydraulic Expansion, the swollen external diameter being honored as a queen is big, righting effect more preferably, realizes the placed in the middle of down-hole horizontal section sleeve pipe, makes cement sheath uniform, be conducive to improving cementing quality.
Description
Technical field
It is a kind of hydraulic casing centralizer the present invention relates to oil gas field downhole tool technical field.
Background technology
In petroleum drilling operation, the quality of horizontal cementing quality directly governs the oil production in oil well later stage.At present
Well cementation both at home and abroad is more using conventional cannula centralizers such as rigid centralizer and rolling wheel centralizers, is helped for net horizontal section using elasticity
Positive device is cemented the well, but there are the following problems using elastic centralizer well cementation：The frictional resistance of centralizer tripping in is very big, performance
It is unreliable；It is inadequate using ordinary elasticity centralizer leaf spring bearing capacity especially for the unconventional stratum such as mud shale；Sleeve pipe is not occupied
In, well cementation is difficult, and cementing concrete ring thickness is uneven, has a strong impact on the quality of well cementation, causes later stage production, operation to there is oil gas
The hidden danger invaded.
The content of the invention
The invention provides a kind of hydraulic casing centralizer, the deficiency of above-mentioned prior art is overcome, it can effectively be solved
Size that certainly conventional centralizer is present during existing level down-hole casing is big, tripping in is difficult, under fashionable easy thorn scrape well, shape
Into sand plug, elastic centralizer leaf spring bearing capacity is inadequate, casing centralization is of poor quality, well cementation is difficult, cementing quality is poor the problem of.
The technical scheme is that realized by following measures：A kind of hydraulic casing centralizer, including mandrel,
Fluid cylinder set, unidirectional spacing ring, shear pin, help expanding block and along mandrel it is circumferentially uniform be no less than the centralizer leaf spring of two,
The top of fluid cylinder set is fixedly mounted in the external wall of upper portion of mandrel by the first fixation kit, and the inwall of fluid cylinder set is provided with first
First annular chamber is formed between annular groove and the second annular groove, the outer wall of first annular groove and mandrel, the second annular is recessed
Formed between groove and the outer wall of mandrel on the second annular chamber, the side wall of mandrel radially provided with can be by the inside of mandrel and first
The inlet opening of annular chamber connection, be provided with the second annular chamber can along mandrel piston cylinder in axial sliding, first annular chamber with
The second annular chamber connection above piston cylinder；The lower end of piston cylinder is installed with piston rod, and the outer wall of piston rod is provided with the
Unidirectional spacing ring is installed with one limiting tooth button, the inwall of fluid cylinder set, the inwall of unidirectional spacing ring is provided with and the first limit
The second limiting tooth button that position tooth button is engaged；The lower end of piston rod is fixedly mounted on the outer of mandrel by shear pin radially
On wall；The upper end of centralizer leaf spring is fixedly connected by the second fixation kit with the lower end of piston rod；On the middle part outer wall of mandrel
Fixed installation helps expanding block, and the middle part of centralizer leaf spring is located at the outside for helping expanding block and the first ring of formation radially outward
Shape is raised；The lower end of centralizer leaf spring is fixedly mounted on the bottom outer wall of mandrel by the 3rd fixation kit.
Here is the further optimization and/or improvements to foregoing invention technical scheme：
Above-mentioned first fixation kit includes upper interstage sleeve and first fixes baffle ring, and the external wall of upper portion of mandrel is provided with the first limited ring groove,
The first fixation baffle ring is installed with first limited ring groove, upper interstage sleeve is arranged on the outside of mandrel and is located in the first fixation gear
On the upper surface of ring；The upper inside wall of fluid cylinder set is provided with the 3rd annular groove, and the bottom outer wall of upper interstage sleeve is provided with and the 3rd ring
The fourth annular groove that connected in star is engaged, the inwall of the outer wall and fourth annular groove of the 3rd annular groove is threadably secured
Connection, fluid cylinder set is located in by the lower surface of the 3rd annular groove on the lower surface of the first fixation baffle ring.
Above-mentioned second fixation kit includes the first reducing sleeve and the first pin for suppressing metal, and the lower end inner wall of piston rod is provided with the 5th
Annular groove, the first reducing sleeve is arranged on the outer wall of mandrel, and the upper end outer wall of the first reducing sleeve is provided with the 6th annular groove, the
The outer wall of the inwall of five annular grooves and the 6th annular groove is connected through a screw thread, and the bottom of the first reducing sleeve passes through the first fastening
Pin is fixedly connected with the upper end of centralizer leaf spring.
Above-mentioned 3rd fixation kit include the second reducing sleeve, the second pin for suppressing metal, double thread baffle ring, second fix baffle ring and
Provided with mounting hole vertically inside lower interstage sleeve, the second reducing sleeve, the lower end of centralizer leaf spring passes through mounting hole, the second reducing sleeve
Top be fixedly connected with centralizer leaf spring by the second pin for suppressing metal radially；The bottom outer wall of mandrel is provided with the second limit
The second fixation baffle ring is installed with inside position groove, the second limited impression, lower interstage sleeve is arranged on the outside of mandrel and is located in
Second fixes on the lower surface of baffle ring；Be provided with the second annular protrusion in the middle part of the inwall of double thread baffle ring, the second annular protrusion it is upper
Upper inside wall the 7th annular groove of formation of end face and double thread baffle ring, lower surface and the double thread baffle ring of the second annular protrusion
Lower inner wall the 8th annular groove of formation, the lower surface of the second annular protrusion is located on the upper surface of the second fixation baffle ring；Under
The bottom outer wall of interstage sleeve is provided with the 9th annular groove, and the inwall of the 8th annular groove and the outer wall of the 9th annular groove pass through screw thread
Connection；The bottom outer wall of second reducing sleeve is provided with the tenth annular groove, the inwall of the 7th annular groove and the tenth annular groove
Outer wall is connected through a screw thread；The lower surface of centralizer leaf spring is located on the upper surface of the second annular protrusion.
Above-mentioned hydraulic casing centralizer also includes stop collar, the lower end inner wall of the fluid cylinder set below unidirectional spacing ring
Provided with the 11st annular groove, the upper end outer wall of stop collar is provided with the tenth second ring groove, the inwall of the 11st annular groove with
The outer wall of 12nd wake-up groove is connected through a screw thread, and the lower surface of the tenth second ring groove is located in the lower surface of fluid cylinder set
On；The outer wall of piston rod above shear pin is provided with the 13rd annular groove, and stop collar is arranged on the 13rd annular
The outside of groove, the lower surface of stop collar is located on the lower surface of the 13rd annular groove.
The middle part outer wall of above-mentioned mandrel is provided with fixed in the 3rd limited ring groove and the 4th limited ring groove, the 3rd limited ring groove
It is provided with the 3rd fixation baffle ring, the 4th limited ring groove and is installed with the 4th fixation baffle ring, helps the upper surface of expanding block to be located in
Fixed the 3rd on the lower surface of baffle ring, help the lower surface of expanding block to be located on the upper surface of the 4th fixation baffle ring.
The upper end outer wall of above-mentioned mandrel is provided with external screw thread, and the lower end outer wall of mandrel is provided with external screw thread；Or/and, positioned at first
The inwall of fluid cylinder set between annular groove and the 3rd annular groove is provided with the first closure gasket groove and the second closure gasket groove, first
It is provided with closure gasket groove in the first sealing ring, the second closure gasket groove and is provided with the second sealing ring；The outer wall of piston cylinder is provided with the 3rd
It is provided with closure gasket groove and the 4th closure gasket groove, the 3rd closure gasket groove in the 3rd sealing ring, the 4th annular groove and is provided with the 4th sealing ring.
Reasonable and compact in structure of the present invention, easy to use, its size is small, is at the moment more prone in lower going-into-well, will not be to well
Wall causes thorn to scrape；The hydraulic casing centralizer is sealed using Hydraulic Expansion, and the swollen external diameter being honored as a queen is than righting of the prior art
The external diameter of device is big, and more preferably, stronger to the enabling capabilities of the borehole wall, bearing capacity is stronger for righting effect, finally realizes down-hole horizontal section set
Pipe it is placed in the middle, make cement sheath uniform, be conducive to improving cementing quality, solving existing casing stabbing board makes fashionable friction under sleeve pipe
The problem of power is big, increases substantially well cementation efficiency, reduces drilling cost, with it is safe, laborsaving, easy, efficient the characteristics of.
Brief description of the drawings
Accompanying drawing 1 is the main view half section structural representation of preferred embodiment top half.
Accompanying drawing 2 is the main view half section structural representation of preferred embodiment the latter half.
Accompanying drawing 3 is the mplifying structure schematic diagram in B portions in accompanying drawing 1.
Accompanying drawing 4 is the mplifying structure schematic diagram in C portions in accompanying drawing 1.
Accompanying drawing 5 is the mplifying structure schematic diagram in D portions in accompanying drawing 2.
Accompanying drawing 6 be in accompanying drawing 2 A-A to cross section structure diagram.
Coding in accompanying drawing is respectively：1 is mandrel, and 2 be fluid cylinder set, and 3 be unidirectional spacing ring, and 4 be shear pin, and 5 be to help
Expanding block, 6 be centralizer leaf spring, and 7 be first annular chamber, and 8 be the second annular chamber, and 9 be inlet opening, and 10 be piston cylinder, and 11 be work
Stopper rod, 12 be first annular projection, and 13 be upper interstage sleeve, and 14 be the first fixation baffle ring, and 15 be the first reducing sleeve, and 16 be the first fastening
Pin, 17 be the second reducing sleeve, and 18 be the second pin for suppressing metal, and 19 be double thread baffle ring, and 20 be the second fixation baffle ring, and 21 be lower block
Set, 22 be the second annular protrusion, and 23 be stop collar, and 24 be the 3rd fixation baffle ring, and 25 fix baffle ring for the 4th, and 26 be first close
Seal, 27 be the second sealing ring, and 28 be the 3rd sealing ring, and 29 be the 4th sealing ring.
Embodiment
The present invention is not limited by following embodiments, can technique according to the invention scheme and actual conditions it is specific to determine
Embodiment.
In the present invention, for the ease of description, the description of the relative position relation of each part is according to Figure of description 1
Butut mode be described, such as：The position relationship of forward and backward, upper and lower, left and right etc. is the Butut according to Figure of description
Direction is determined.
With reference to embodiment and accompanying drawing, the invention will be further described：
As shown in accompanying drawing 1,2,3,4,5,6, the hydraulic casing centralizer includes mandrel 1, fluid cylinder and covers 2, unidirectional spacing ring 3, cuts
Cut pin 4, help expanding block 5 and along the circumferential uniform centralizer leaf spring 6 for being no less than two of mandrel 1, the top of fluid cylinder set 2 passes through
First fixation kit is fixedly mounted in the external wall of upper portion of mandrel 1, and the inwall of fluid cylinder set 2 is provided with first annular groove and second
First annular chamber 7 is formed between annular groove, the outer wall of first annular groove and mandrel 1, the second annular groove is outer with mandrel 1
Formed between wall and be radially provided with and the inside of mandrel 1 can be connected with first annular chamber 7 on the second annular chamber 8, the side wall of mandrel 1
Being provided with logical inlet opening 9, the second annular chamber 8 can be along piston cylinder 10 in axial sliding of mandrel 1, and first annular chamber 7 is with living
Second annular chamber 8 of the top of plug tube 10 is connected；The lower end of piston cylinder 10 is installed with piston rod 11, the outer wall of piston rod 11
Provided with the first limiting tooth button, unidirectional spacing ring 3 is installed with the inwall of fluid cylinder set 2, the inwall of unidirectional spacing ring 3 is provided with
The second limiting tooth button being engaged with the first limiting tooth button；The lower end of piston rod 11 is fixed by shear pin 4 radially pacifies
On the outer wall of mandrel 1；The upper end of centralizer leaf spring 6 is fixedly connected by the second fixation kit with the lower end of piston rod 11；
It is fixedly mounted on the middle part outer wall of mandrel 1 and helps expanding block 5, the middle part of centralizer leaf spring 6 is located at the outside for helping expanding block 5 and shape
Radially first annular raised 12 outwardly；The lower end of centralizer leaf spring 6 is fixedly mounted on mandrel 1 by the 3rd fixation kit
Bottom outer wall on.During use, the top and bottom of mandrel 1 respectively with sleeve pipe connection, the hydraulic casing righting
Device is with sleeve pipe G.I.H, and through hole formation fluid inside mandrel 1 flows through passage, under mud grouting after complete sleeve pipe, and
Fully circulated, the silt in shaft bottom is rinsed well；Then pitching builds the pressure, and the passage that fluid flows through in the middle of mandrel 1 is blocked
Firmly, fluid will pass through inlet opening 9 and flow into first annular chamber 7, fluid flowed into through first annular chamber 7 in the second annular chamber 8 and
The end face of piston cylinder 10 forms larger motive force, when reaching certain pressure value when being built the pressure in sleeve pipe, connection piston rod 11 and core
The shear pin 4 of axle 1 is cut, and piston cylinder 10 promotes piston rod 11 to move downward, and piston rod 11 promotes centralizer leaf spring 6 together
Slided along the axial direction of mandrel 1, due to helping expanding block 5 to prop up the middle part of centralizer leaf spring 6 and forming first annular convex
12 are played, therefore centralizer leaf spring 6 can realize swollen envelope in the presence of external force along radially expanding；Expanding block 5 is helped to play limit
Position effect, when the second fixation kit lower end motion and touch help expanding block 5 when, centralizer leaf spring 6 is swollen sealed knot beam；Piston rod
The second limiting tooth on unidirectional spacing ring 3, unidirectional spacing ring 3 and first on piston rod 11 are installed between 11 and fluid cylinder set 2
Limiting tooth coordinates, and after the Fluid pressure in sleeve pipe is laid down, unidirectional spacing ring 3 can prevent piston cylinder 10 and piston rod 11 from helping
Up moved in the presence of the reaction force that positive device leaf spring 6 applies, realize the monodirectional locking of piston cylinder 10 and piston rod 11, prevent
Centralizer leaf spring 6 resets；Shear pin 4 is along the circumferential uniform of piston rod 11, and the number of shear pin 4 can be according to inside pipe casing
The size of shearing force is needed to determine after building the pressure, when pressure reaches setting value, shear pin 4 is just cut, and realizes piston
Cylinder 10, piston rod 11, centralizer leaf spring 6 it is descending.The compact conformation of the hydraulic casing centralizer, size is small, in lower going-into-well
At the moment it is more prone to, thorn will not be caused to scrape the borehole wall；The hydraulic casing centralizer is sealed using Hydraulic Expansion, and the swollen external diameter being honored as a queen
External diameter than centralizer of the prior art is big, and more preferably, stronger to the enabling capabilities of the borehole wall, bearing capacity is stronger for righting effect,
It is final to realize the placed in the middle of down-hole horizontal section sleeve pipe, make cement sheath uniform, be conducive to improving cementing quality, solve existing sleeve pipe and help
Positive device makes the problem of fashionable frictional force is big under sleeve pipe, increases substantially well cementation efficiency, reduces drilling cost.
Above-mentioned hydraulic casing centralizer can be made further optimization and/or improvements according to actual needs：
As shown in accompanying drawing 1,3, above-mentioned first fixation kit, which includes upper interstage sleeve 13 and first, to be fixed outside baffle ring 14, the top of mandrel 1
Wall, which is provided with the first limited ring groove, the first limited ring groove, is installed with the first fixation baffle ring 14, and upper interstage sleeve 13 is arranged on mandrel 1
Outside and be located on the upper surface of the first fixation baffle ring 14；The upper inside wall of fluid cylinder set 2 is provided with the 3rd annular groove, upper gear
The bottom outer wall of set 13 is provided with the fourth annular groove that is engaged with the 3rd annular groove, the outer wall of the 3rd annular groove and the
The inwall of four annular grooves is threadably secured connection, and fluid cylinder set 2 is located in first by the lower surface of the 3rd annular groove and consolidated
On the lower surface for determining baffle ring 14.Upper interstage sleeve 13 is arranged on the upper end of mandrel 1, can prevent solid particle from entering the hydraulic casing
The inside of centralizer；Upper interstage sleeve 13 and fluid cylinder set 2 is together by a threaded connection；First, which fixes baffle ring 14, is arranged on upper interstage sleeve 13
Between fluid cylinder set 2, the upward sliding in the presence of Fluid pressure of fluid cylinder set 2 can be prevented, while playing axle to upper interstage sleeve 13
To spacing effect；First fixation baffle ring 14 is a kind of split ring, convenient for assembly, and can play the work of positioning adjacent structure
With first fixes the inside for the first limited ring groove that baffle ring 14 is arranged on mandrel 1.
As shown in accompanying drawing 1,4, above-mentioned second fixation kit includes the first reducing sleeve 15 and the first pin for suppressing metal 16, piston rod
11 lower end inner wall be provided with the 5th annular groove, the first reducing sleeve 15 be arranged on mandrel 1 outer wall on, the first reducing sleeve 15 it is upper
Outer wall is held to be provided with the 6th annular groove, the inwall of the 5th annular groove and the outer wall of the 6th annular groove are connected through a screw thread, the
The bottom of one reducing sleeve 15 is fixedly connected by the first pin for suppressing metal 16 with the upper end of centralizer leaf spring 6.The lower end of piston rod 11
It is fixedly connected with the top of the first reducing sleeve 15, the lower end of the first reducing sleeve 15 and the upper end of centralizer leaf spring 6 are tight by first
Gu pin 16 is fixedly connected, so, the first reducing sleeve 15 realizes the switching of piston rod 11 and centralizer leaf spring 6 so that shearing
Pin 4 is when being cut, and piston cylinder 10 can promote the slide downward of piston rod 11, and piston rod 11 promotes centralizer leaf spring 6 to realize
Swollen envelope.
As shown in accompanying drawing 2,5, above-mentioned 3rd fixation kit includes the second reducing sleeve 17, the second pin for suppressing metal 18, double thread
Baffle ring 19, second fixes baffle ring 20 and lower interstage sleeve 21, and the inside of the second reducing sleeve 17 is provided with mounting hole vertically, centralizer leaf spring
6 lower end passes through mounting hole, and the top of the second reducing sleeve 17 and centralizer leaf spring 6 are consolidated by the second pin for suppressing metal 18 radially
Fixed connection；The bottom outer wall of mandrel 1, which is provided with inside the second limited impression, the second limited impression, is installed with the second fixation gear
Ring 20, lower interstage sleeve 21 is arranged on the outside of mandrel 1 and is located on the lower surface of the second fixation baffle ring 20；Double thread baffle ring 19
The second annular protrusion 22 is provided with the middle part of inwall, the upper surface of the second annular protrusion 22 and the upper inside wall of double thread baffle ring 19 are formed
7th annular groove, the lower surface of the second annular protrusion 22 and lower inner wall the 8th annular groove of formation of double thread baffle ring 19,
The lower surface of second annular protrusion 22 is located on the upper surface of the second fixation baffle ring 20；The bottom outer wall of lower interstage sleeve 21 is provided with the
Nine annular grooves, the outer wall of the inwall and the 9th annular groove of the 8th annular groove is connected through a screw thread；Second reducing sleeve 17
Bottom outer wall is provided with the tenth annular groove, and the outer wall of the inwall and the tenth annular groove of the 7th annular groove is connected through a screw thread；
The lower surface of centralizer leaf spring 6 is located on the upper surface of the second annular protrusion 22.Lower interstage sleeve 21 is arranged on the lower end of mandrel 1,
It can prevent solid particle from entering the inside of the hydraulic casing centralizer from bottom；The top of second reducing sleeve 17 and righting
The lower end of device leaf spring 6 is connected by the second pin for suppressing metal 18, and the bottom of the second reducing sleeve 17 leads to the top of double thread baffle ring 19
Cross and be threaded togather, the bottom of double thread baffle ring 19 and the top of lower interstage sleeve 21 are together by a threaded connection；Second consolidates
Determine baffle ring 20 to be located between double thread baffle ring 19 and lower interstage sleeve 21, axial limiting, and then realization pair are carried out to double thread baffle ring 19
Second reducing sleeve 17 and the axial limiting of the lower end of centralizer leaf spring 6 so that centralizer leaf spring 6 can be along footpath in the presence of external force
To deformation, swollen envelope is realized, while the second fixation baffle ring 20 can also carry out axial limiting to lower interstage sleeve 21；Second reducing sleeve 17 is real
The switching of centralizer leaf spring 6 and double thread leaf spring is showed；Second fixation baffle ring 20 uses open ring structure, it is convenient for assembly and
It can play a part of positioning adjacent structure.As shown in accompanying drawing 1,2,6, the hydraulic casing centralizer includes circumferential along mandrel 1
Six uniform centralizer leaf springs 6, it is corresponding, it is necessary to be distinguished six centralizer leaf springs 6 using six the second pins for suppressing metal 18
It is fixedly mounted on the second reducing sleeve 17, the number of the number of centralizer leaf spring 6 and the second pin for suppressing metal 18 can be according to reality
Border builds the pressure size and other requirements are selected.
As shown in accompanying drawing 1,4, above-mentioned hydraulic casing centralizer also includes stop collar 23, positioned at the unidirectional lower section of spacing ring 3
The lower end inner wall of fluid cylinder set 2 be provided with the 11st annular groove, the upper end outer wall of stop collar 23 is provided with the tenth second ring groove, the
The outer wall of the inwall of 11 annular grooves and the 12nd wake-up groove is connected through a screw thread, and the lower surface of fluid cylinder set 2 is located in the
On the lower surface of ten second ring grooves；Outer wall positioned at the piston rod 11 of the top of shear pin 4 is provided with the 13rd annular groove,
Stop collar 23 is arranged on the outside of the 13rd annular groove, and the lower end of the 13rd annular groove is located in the lower surface of stop collar 23
On face.The upper surface of stop collar 23 can carry out axial limiting to unidirectional spacing ring 3, prevent the unidirectional slide downward of spacing ring 3；Limit
The lower surface of position set 23 can carry out axial limiting to piston rod 11, prevent the upward sliding of piston rod 11.
As shown in Figure 2, the middle part outer wall of above-mentioned mandrel 1 is provided with the 3rd limited ring groove and the 4th limited ring groove, the 3rd
It is installed with limited ring groove in the 3rd fixation baffle ring 24, the 4th limited ring groove and is installed with the 4th fixation baffle ring 25, is helped
The upper surface of expanding block 5 is located on the lower surface of the 3rd fixation baffle ring 24, helps the lower surface of expanding block 5 to be located in the 4th fixation
On the upper surface of baffle ring 25.3rd fixation baffle ring 24 and the 4th, which fixes baffle ring 25, can realize the axial limiting to helping expanding block 5,
Prevent from helping the lower slider vertically of expanding block 5, it is ensured that centralizer leaf spring 6 is radially expanded in the presence of external force, realizes swollen envelope；
3rd fixation baffle ring 24 and the 4th fixes baffle ring 25 and uses open ring structure, convenient for assembly and can play positioning adjacent bonds
The effect of structure.
As shown in accompanying drawing 1,2, the upper end outer wall of above-mentioned mandrel 1 is provided with external screw thread, and the lower end outer wall of mandrel 1 is provided with outer spiral shell
Line.So, the upper end of mandrel 1 can be connected through a screw thread with sleeve pipe, and the lower end of mandrel 1 can be connected through a screw thread with sleeve pipe,
Realize and the hydraulic casing centralizer is arranged on sleeve pipe, the purpose of tripping in well together with sleeve pipe.
As shown in accompanying drawing 1,3, on the inwall of the above-mentioned fluid cylinder set 2 being located between first annular groove and the 3rd annular groove
Provided with the first closure gasket groove and the second closure gasket groove, it is provided with the first closure gasket groove in the first sealing ring 26, the second closure gasket groove
Provided with the second sealing ring 27；The outer wall of piston cylinder 10 is provided with the 3rd closure gasket groove and the 4th closure gasket groove, the 3rd closure gasket groove
Inside it is provided with the 3rd sealing ring 28, the 4th annular groove and is provided with the 4th sealing ring 29.So, the is installed between mandrel 1 and fluid cylinder set 2
One sealing ring 26 and the second sealing ring 27, when fluid from inlet opening 9 enter first annular chamber 7 in when, it is possible to achieve fluid it is quiet
Sealing, prevents fluid from passing through the clearance leakage between mandrel 1 and fluid cylinder set 2, it is ensured that the effect that builds the pressure after pitching, makes to cut after building the pressure
Cutting pin 4 can normally be cut, and realize the swollen envelope of centralizer leaf spring 6；3rd sealing ring 28 and the 4th sealing ring 29 can be true
Sealing between the inwall of the annular chamber 8 of keep-alive plug tube 10 and second, it is ensured that shear pin 4 can be cut after building the pressure.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and it has stronger adaptability and optimal implementation effect
Really, non-essential technical characteristic can be increased and decreased according to actual needs, to meet the demand of different situations.
Claims (10)
1. a kind of hydraulic casing centralizer, it is characterised in that including mandrel, fluid cylinder set, unidirectional spacing ring, shear pin, help swollen
Expansion block and along mandrel it is circumferentially uniform be no less than the centralizer leaf spring of two,
The top of fluid cylinder set is fixedly mounted in the external wall of upper portion of mandrel by the first fixation kit, and the inwall of fluid cylinder set is provided with
First annular chamber, the second ring are formed between first annular groove and the second annular groove, the outer wall of first annular groove and mandrel
Formed between connected in star and the outer wall of mandrel on the second annular chamber, the side wall of mandrel radially provided with can by the inside of mandrel with
Be provided with the inlet opening of first annular chamber connection, the second annular chamber can along mandrel piston cylinder in axial sliding, it is first annular
Chamber is connected with the second annular chamber above piston cylinder；
The lower end of piston cylinder is installed with piston rod, and the outer wall of piston rod is provided with the first limiting tooth button, the inwall of fluid cylinder set
On be installed with unidirectional spacing ring, the inwall of unidirectional spacing ring is provided with the second limiting tooth being engaged with the first limiting tooth button
Button；
The lower end of piston rod is fixedly mounted on the outer wall of mandrel by shear pin radially；
The upper end of centralizer leaf spring is fixedly connected by the second fixation kit with the lower end of piston rod；
It is fixedly mounted on the middle part outer wall of mandrel and helps expanding block, the middle part of centralizer leaf spring is located at the outside for helping expanding block and shape
Radially first annular projection outwardly；
The lower end of centralizer leaf spring is fixedly mounted on the bottom outer wall of mandrel by the 3rd fixation kit.
2. hydraulic casing centralizer according to claim 1, it is characterised in that the first fixation kit include upper interstage sleeve and
First fixes baffle ring, and the external wall of upper portion of mandrel, which is provided with the first limited ring groove, the first limited ring groove, is installed with the first fixation
Baffle ring, upper interstage sleeve is arranged on the outside of mandrel and is located on the upper surface of the first fixation baffle ring；The upper inside wall of fluid cylinder set is set
There is the 3rd annular groove, the bottom outer wall of upper interstage sleeve is provided with the fourth annular groove being engaged with the 3rd annular groove, the 3rd
The outer wall of annular groove is threadably secured with the inwall of fourth annular groove and is connected, and fluid cylinder set passes through under the 3rd annular groove
End face is located on the lower surface of the first fixation baffle ring.
3. hydraulic casing centralizer according to claim 1, it is characterised in that the second fixation kit includes the first switching
Set and the first pin for suppressing metal, the lower end inner wall of piston rod are provided with the 5th annular groove, and the first reducing sleeve is arranged on the outer wall of mandrel
On, the upper end outer wall of the first reducing sleeve is provided with the 6th annular groove, the inwall of the 5th annular groove and the 6th annular groove it is outer
Wall is connected through a screw thread, and the bottom of the first reducing sleeve is fixedly connected by the first pin for suppressing metal with the upper end of centralizer leaf spring.
4. hydraulic casing centralizer according to claim 1, it is characterised in that the 3rd fixation kit includes the second switching
Set, the second pin for suppressing metal, double thread baffle ring, second are fixed inside baffle ring and lower interstage sleeve, the second reducing sleeve provided with peace vertically
Hole is filled, the lower end of centralizer leaf spring passes through mounting hole, and the top of the second reducing sleeve and centralizer leaf spring pass through second radially
Pin for suppressing metal is fixedly connected；The bottom outer wall of mandrel is provided with inside the second limited impression, the second limited impression and is installed with
Second fixes baffle ring, and lower interstage sleeve is arranged on the outside of mandrel and is located on the lower surface of the second fixation baffle ring；Double thread baffle ring
Inwall in the middle part of be provided with the second annular protrusion, the upper surface of the second annular protrusion and the upper inside wall formation the 7th of double thread baffle ring
Annular groove, the lower surface of the second annular protrusion and lower inner wall the 8th annular groove of formation of double thread baffle ring, the second annular
Raised lower surface is located on the upper surface of the second fixation baffle ring；The bottom outer wall of lower interstage sleeve is provided with the 9th annular groove, the
The outer wall of the inwall of eight annular grooves and the 9th annular groove is connected through a screw thread；The bottom outer wall of second reducing sleeve is provided with the tenth
Annular groove, the outer wall of the inwall and the tenth annular groove of the 7th annular groove is connected through a screw thread；The lower end of centralizer leaf spring
Face is located on the upper surface of the second annular protrusion.
5. the hydraulic casing centralizer according to claim 1 or 2 or 3 or 4, it is characterised in that hydraulic casing centralizer
Also include stop collar, the lower end inner wall of the fluid cylinder set below unidirectional spacing ring is provided with the 11st annular groove, stop collar
Upper end outer wall is provided with the tenth second ring groove, and the inwall of the 11st annular groove and the 12nd outer wall for waking up groove pass through screw thread
Connection, the lower surface of fluid cylinder set is located on the lower surface of the tenth second ring groove；Piston rod above shear pin
Outer wall is provided with the 13rd annular groove, and stop collar is arranged on the outside of the 13rd annular groove, and the lower surface of stop collar is located in
On the lower surface of the 13rd annular groove.
6. the hydraulic casing centralizer according to claim 1 or 2 or 3 or 4, it is characterised in that on the middle part outer wall of mandrel
Provided with the 3rd limited ring groove and the 4th limited ring groove, the 3rd fixation baffle ring is installed with the 3rd limited ring groove, the 4th is spacing
The 4th fixation baffle ring is installed with annular groove, helps the upper surface of expanding block to be located on the lower surface of the 3rd fixation baffle ring, helps
The lower surface of expanding block is located on the upper surface of the 4th fixation baffle ring.
7. hydraulic casing centralizer according to claim 5, it is characterised in that the middle part outer wall of mandrel is provided with the 3rd
It is installed with limited ring groove and the 4th limited ring groove, the 3rd limited ring groove solid in the 3rd fixation baffle ring, the 4th limited ring groove
Baffle ring is fixed equipped with the 4th by Dingan County, helps the upper surface of expanding block to be located on the lower surface of the 3rd fixation baffle ring, helps expanding block
Lower surface is located on the upper surface of the 4th fixation baffle ring.
8. the hydraulic casing centralizer according to claim 1 or 2 or 3 or 4, it is characterised in that the upper end outer wall of mandrel is set
There is external screw thread, the lower end outer wall of mandrel is provided with external screw thread；Or/and, between first annular groove and the 3rd annular groove
The inwall of fluid cylinder set, which is provided with the first closure gasket groove and the second closure gasket groove, the first closure gasket groove, is provided with the first sealing ring, the
The second sealing ring is provided with two closure gasket grooves；The outer wall of piston cylinder is provided with the 3rd closure gasket groove and the 4th closure gasket groove, the 3rd
It is provided with closure gasket groove in the 3rd sealing ring, the 4th annular groove and is provided with the 4th sealing ring.
9. hydraulic casing centralizer according to claim 5, it is characterised in that the upper end outer wall of mandrel is provided with external screw thread,
The lower end outer wall of mandrel is provided with external screw thread；Or/and, in the fluid cylinder set between first annular groove and the 3rd annular groove
Wall, which is provided with the first closure gasket groove and the second closure gasket groove, the first closure gasket groove, is provided with the first sealing ring, the second closure gasket groove
Inside it is provided with the second sealing ring；The outer wall of piston cylinder is provided with the 3rd closure gasket groove and the 4th closure gasket groove, the 3rd closure gasket groove
Provided with the 3rd sealing ring, the 4th sealing ring is provided with the 4th annular groove.
10. hydraulic casing centralizer according to claim 6, it is characterised in that the upper end outer wall of mandrel is provided with outer spiral shell
Line, the lower end outer wall of mandrel is provided with external screw thread；Or/and, the fluid cylinder set between first annular groove and the 3rd annular groove
Inwall be provided with the first closure gasket groove and the second closure gasket groove, the first sealing ring, the second sealing are provided with the first closure gasket groove
The second sealing ring is provided with annular groove；The outer wall of piston cylinder is provided with the 3rd closure gasket groove and the 4th closure gasket groove, the 3rd sealing ring
It is provided with groove in the 3rd sealing ring, the 4th annular groove and is provided with the 4th sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710241493.1A CN107120073A (en) | 2017-04-13 | 2017-04-13 | Hydraulic casing centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710241493.1A CN107120073A (en) | 2017-04-13 | 2017-04-13 | Hydraulic casing centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107120073A true CN107120073A (en) | 2017-09-01 |
Family
ID=59726016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710241493.1A Pending CN107120073A (en) | 2017-04-13 | 2017-04-13 | Hydraulic casing centralizer |
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| CN (1) | CN107120073A (en) |
Cited By (8)
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|---|---|---|---|---|
| CN109236200A (en) * | 2018-09-28 | 2019-01-18 | 西南石油大学 | A kind of adjustable centralizer of explosion driving |
| CN110578480A (en) * | 2019-09-24 | 2019-12-17 | 中国石油集团西部钻探工程有限公司 | Reliable hydraulic centralizer |
| CN110593778A (en) * | 2019-09-24 | 2019-12-20 | 中国石油集团西部钻探工程有限公司 | Self-opening hydraulic centralizer |
| CN112696162A (en) * | 2021-03-12 | 2021-04-23 | 东营市福利德石油科技开发有限责任公司 | Downhole double-tube sliding self-sealing tool |
| CN113250628A (en) * | 2021-07-16 | 2021-08-13 | 山东辛丁技术有限公司 | Hydraulic casing centralizer for oil exploitation |
| US11226003B2 (en) * | 2019-05-23 | 2022-01-18 | Benteler Automobiltechnik Gmbh | Bearing arrangement |
| CN114086898A (en) * | 2022-01-17 | 2022-02-25 | 山东健源石油工程技术有限公司 | Casing centralizer for well cementation construction and method |
| CN116624109A (en) * | 2023-07-25 | 2023-08-22 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
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| CN112696162B (en) * | 2021-03-12 | 2022-07-01 | 东营市福利德石油科技开发有限责任公司 | Downhole double-tube sliding self-sealing tool |
| CN113250628B (en) * | 2021-07-16 | 2021-09-10 | 山东辛丁技术有限公司 | Hydraulic casing centralizer for oil exploitation |
| CN113250628A (en) * | 2021-07-16 | 2021-08-13 | 山东辛丁技术有限公司 | Hydraulic casing centralizer for oil exploitation |
| CN114086898A (en) * | 2022-01-17 | 2022-02-25 | 山东健源石油工程技术有限公司 | Casing centralizer for well cementation construction and method |
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| CN116624109A (en) * | 2023-07-25 | 2023-08-22 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
| CN116624109B (en) * | 2023-07-25 | 2023-09-19 | 成都阿斯贝瑞科技有限公司 | Multi-pitching variable-diameter hydraulic centralizer |
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