CN206707644U - Hydraulic casing centralizer - Google Patents

Hydraulic casing centralizer Download PDF

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Publication number
CN206707644U
CN206707644U CN201720387137.6U CN201720387137U CN206707644U CN 206707644 U CN206707644 U CN 206707644U CN 201720387137 U CN201720387137 U CN 201720387137U CN 206707644 U CN206707644 U CN 206707644U
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China
Prior art keywords
groove
mandrel
ring
annular groove
annular
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CN201720387137.6U
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Chinese (zh)
Inventor
李晓军
穆总结
李富强
林建增
高传文
于洋飞
陈勇
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China National Petroleum Corp
CNPC Xibu Drilling Engineering Co Ltd
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CNPC Xibu Drilling Engineering Co Ltd
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Abstract

It the utility model is related 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, and piston cylinder is provided with the second annular chamber;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.The utility model is compact-sized, 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 be honored as a queen is big, and righting effect is more preferable, realizes the placed in the middle of down-hole horizontal section sleeve pipe, makes cement sheath uniform, is advantageous to improve cementing quality.

Description

Hydraulic casing centralizer
Technical field
Oil gas field downhole tool technical field is the utility model is related to, is a kind of hydraulic casing centralizer.
Background technology
In petroleum drilling operation, the quality of horizontal cementing quality, the oil production in oil well later stage directly govern.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 does not occupy 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 oil gas to be present The hidden danger invaded.
The content of the invention
The utility model provides a kind of hydraulic casing centralizer, overcomes the deficiency of above-mentioned prior art, and it can have Effect solve existing level down-hole casing during size existing for conventional centralizer is big, tripping in is difficult, under it is fashionable easily thorn scrape well Eye, form sand plug, elastic centralizer leaf spring bearing capacity is inadequate, casing centralization is of poor quality, well cementation is difficult, cementing quality is poor asks Topic.
The technical solution of the utility model is 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 of two Leaf spring, the top of fluid cylinder set are fixedly mounted in the external wall of upper portion of mandrel by the first fixation kit, are set on the inwall of fluid cylinder set There are first annular groove and the second annular groove, form first annular chamber between the outer wall of first annular groove and mandrel, second The second annular chamber is formed between annular groove and the outer wall of mandrel, being radially provided with the side wall of mandrel can be by the inside of mandrel The inlet opening connected with first annular chamber, being provided with the second annular chamber can be along the piston cylinder in axial sliding of mandrel, the first ring Shape chamber connects with the second annular chamber above piston cylinder;The lower end of piston cylinder is installed with piston rod, on the outer wall of piston rod Provided with the first limiting tooth button, unidirectional spacing ring is installed with the inwall of fluid cylinder set, the inwall of unidirectional spacing ring be provided with The second limiting tooth button that first limiting tooth button is engaged;The lower end of piston rod is fixedly mounted on core by shear pin radially On the outer wall of axle;The upper end of centralizer leaf spring is fixedly connected by the second fixation kit with the lower end of piston rod;The middle part of mandrel It is fixedly mounted on outer wall and helps expanding block, the middle part of centralizer leaf spring is located at the outside for helping expanding block and formed radially outward First annular projection;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 above-mentioned utility model technical scheme:
Above-mentioned first fixation kit includes upper interstage sleeve and first and fixes baffle ring, and the external wall of upper portion of mandrel is provided with the first spacing ring Groove, is installed with the first fixation baffle ring in the first limited ring groove, and upper interstage sleeve is arranged on the outside of mandrel and to be located in first solid Determine on the upper surface of baffle 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 the The fourth annular groove that three annular grooves are engaged, the outer wall of the 3rd annular groove pass through screw thread with the inwall of fourth annular groove It is fixedly connected, 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 are 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 Lower interstage sleeve, the second reducing sleeve inside are provided with mounting hole vertically, and 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 Position groove, the second fixation baffle ring is installed with inside the second limited impression, and 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 The upper inside wall of end face and double thread baffle ring forms the 7th annular groove, lower surface and the double thread baffle ring of the second annular protrusion Lower inner wall forms the 8th annular groove, and 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 are located on the lower surface of the 13rd annular groove.
The middle part outer wall of above-mentioned mandrel is provided with the 3rd limited ring groove and the 4th limited ring groove, is fixed in the 3rd limited ring groove 3rd fixation baffle ring is installed, the 4th fixation baffle ring is installed with the 4th limited ring groove, 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, and first The first sealing ring is provided with closure gasket groove, the second sealing ring is provided with the second closure gasket groove;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 is interior to be provided with the 3rd sealing ring, and the 4th sealing ring is provided with the 4th annular groove.
The utility model reasonable and compact in structure, easy to use, its size is small, is at the moment more prone in lower going-into-well, will not Thorn is 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 is than of the prior art The external diameter of centralizer is big, and righting effect is more preferable, stronger to the enabling capabilities of the borehole wall, and bearing capacity is stronger, finally realizes down-hole horizontal Section sleeve pipe it is placed in the middle, make cement sheath uniform, be advantageous to improve cementing quality, solve existing casing stabbing board make it is fashionable under sleeve pipe The problem of frictional force is big, well cementation efficiency is increased substantially, reduce drilling cost, there is the characteristics of safe, laborsaving, easy, efficient.
Brief description of the drawings
Accompanying drawing 1 is the main view half section schematic of the best embodiment of the utility model top half.
Accompanying drawing 2 is the main view half section schematic of the best embodiment of the utility model 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 1.
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 be the 4th fixation baffle ring, 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 utility model is not limited by following embodiments, can according to the technical solution of the utility model and actual conditions come Determine specific embodiment.
In the utility model, for the ease of description, the description of the relative position relation of each part is according to specification The Butut mode of accompanying drawing 1 is described, such as:The position relationship of forward and backward, upper and lower, left and right etc. is according to Figure of description Butut direction determine.
The utility model is further described with reference to embodiment and accompanying drawing:
As shown in accompanying drawing 1,2,3,4,5,6, the hydraulic casing centralizer includes mandrel 1, fluid cylinder set 2, unidirectional spacing ring 3rd, shear 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 Be fixedly mounted on by the first fixation kit in the external wall of upper portion of mandrel 1, fluid cylinder set 2 inwall be provided with first annular groove and Second annular groove, first annular chamber 7, the second annular groove and mandrel 1 are formed between the outer wall of first annular groove and mandrel 1 Outer wall between form the second annular chamber 8, be radially provided with the side wall of mandrel 1 can by the inside of mandrel 1 with it is first annular The inlet opening 9 that chamber 7 connects, being provided with the second annular chamber 8 can be along piston cylinder 10 in axial sliding of mandrel 1, first annular chamber 7 Connected with the second annular chamber 8 of the top of piston cylinder 10;The lower end of piston cylinder 10 is installed with piston rod 11, piston rod 11 it is outer Wall is provided with the first limiting tooth button, and fluid cylinder, which covers, is installed with unidirectional spacing ring 3 on 2 inwall, on the inwall of unidirectional spacing ring 3 Provided with the second limiting tooth button being engaged with the first limiting tooth button;The lower end of piston rod 11 is solid by shear pin 4 radially Dingan County is on the outer wall of mandrel 1;The upper end of centralizer leaf spring 6 is fixed by the lower end of the second fixation kit and piston rod 11 to be connected Connect;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 form first annular raised 12 radially outward;The lower end of centralizer leaf spring 6 is fixedly mounted on by the 3rd fixation kit On the bottom outer wall of mandrel 1.During use, the top and bottom of mandrel 1 respectively with sleeve pipe connection, the hydraulic casing For centralizer with sleeve pipe G.I.H, what the through hole inside mandrel 1 formed fluid flows through passage, under fill mud after complete sleeve pipe Slurry, and fully circulated, the silt in shaft bottom is rinsed well;Then pitching builds the pressure, the passage that fluid flows through among mandrel 1 It is plugged, fluid will pass through inlet opening 9 and flow into first annular chamber 7, and fluid is flowed into the second annular chamber 8 through first annular chamber 7 And larger motive force is formed in the end face of piston cylinder 10, when built the pressure in sleeve pipe reach certain pressure value when, connect piston rod 11 Cut with the shear pin 4 of mandrel 1, piston cylinder 10 promotes piston rod 11 to move downward, and piston rod 11 promotes centralizer leaf spring 6 Slided together 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 the first ring Shape projection 12, therefore centralizer leaf spring 6 can realize swollen envelope in the presence of external force along radially expanding;Expanding block 5 is helped to rise To position-limiting action, when the second fixation kit lower end motion and touch help expanding block 5 when, centralizer leaf spring 6 is swollen sealed knot beam;It is living Unidirectional spacing ring 3 is installed between stopper rod 11 and fluid cylinder set 2, the second limiting tooth on unidirectional spacing ring 3 with piston rod 11 First 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 Up moved in the presence of the reaction force that centralizer leaf spring 6 applies, realize the monodirectional locking of piston cylinder 10 and piston rod 11, Prevent centralizer leaf spring 6 from resetting;For shear pin 4 along the circumferential uniform of piston rod 11, the number of shear pin 4 can be according to sleeve pipe Inside needs the size of shearing force 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 hydraulic casing centralizer it is compact-sized, size is small, under It is more prone to when entering well, thorn will not be caused to scrape the borehole wall;The hydraulic casing centralizer is sealed using Hydraulic Expansion, and swollen is honored as a queen External diameter is bigger than the external diameter of centralizer of the prior art, and righting effect is more preferable, stronger to the enabling capabilities of the borehole wall, and bearing capacity is more By force, the placed in the middle of down-hole horizontal section sleeve pipe is finally realized, makes cement sheath uniform, is advantageous to improve cementing quality, solves existing set Pipe centralizer 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 being actually needed:
As shown in accompanying drawing 1,3, above-mentioned first fixation kit include upper interstage sleeve 13 and first fix baffle ring 14, mandrel 1 it is upper Portion's outer wall is provided with the first limited ring groove, and the first fixation baffle ring 14 is installed with the first limited ring groove, and upper interstage sleeve 13 is arranged on The outside of mandrel 1 is simultaneously located on the upper surface of the first fixation baffle ring 14;It is recessed that the upper inside wall of fluid cylinder set 2 is provided with the 3rd annular Groove, the bottom outer wall of upper interstage sleeve 13 are provided with the fourth annular groove being engaged with the 3rd annular groove, the 3rd annular groove Outer wall is threadably secured with the inwall of fourth annular groove and is connected, and fluid cylinder set 2 is located in by the lower surface of the 3rd annular groove Fixed first on the lower surface of baffle ring 14.Upper interstage sleeve 13 is arranged on the upper end of mandrel 1, can prevent solid particle from entering the liquid The inside of pressure type casing stabbing board;Upper interstage sleeve 13 and fluid cylinder set 2 is together by a threaded connection;First fixation baffle ring 14 is arranged on Between upper interstage sleeve 13 and fluid cylinder set 2, the upward sliding in the presence of Fluid pressure of fluid cylinder set 2 can be prevented, while to upper interstage sleeve 13 play a part of axial limiting;First fixation baffle ring 14 is a kind of split ring, convenient for assembly, and can play positioning adjacent bonds The effect of structure, 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 is provided with the 5th annular groove, and the first reducing sleeve 15 is arranged on the outer wall of mandrel 1, the first reducing sleeve 15 it is upper End outer wall is provided with the 6th annular groove, and 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 For pin 4 when being cut, 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 solid by the second pin for suppressing metal 18 radially Fixed connection;The bottom outer wall of mandrel 1 is provided with the second limited impression, and the second fixation gear is installed with inside the second limited impression Ring 20, lower interstage sleeve 21 are arranged on the outside of mandrel 1 and are 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 form the 8th annular groove with the lower inner wall 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 are 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 and the top of double thread baffle ring 19 of the second reducing sleeve 17 lead to 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 is solid 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 fixes baffle ring 20 using 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 build the pressure size and it is other requirement 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;The outer wall of piston rod 11 above 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, and the 3rd The 3rd fixation baffle ring 24 is installed with limited ring groove, the 4th fixation baffle ring 25 is installed with the 4th limited ring groove, 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.The 3rd fixation fixation baffle ring 25 of baffle ring 24 and the 4th 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, which fixes baffle ring 24 and the 4th, fixes baffle ring 25 using 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 between first annular groove and the 3rd annular groove The first sealing ring 26 is provided with provided with the first closure gasket groove and the second closure gasket groove, in the first closure gasket groove, in 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 The 3rd sealing ring 28 is inside provided with, the 4th sealing ring 29 is provided with the 4th annular groove.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, prevent fluid from, by the clearance leakage between mandrel 1 and fluid cylinder set 2, ensureing the effect that builds the pressure after pitching, making 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 most preferred embodiment of the present utility model, and it has stronger adaptability and optimal implementation Effect, can be according to the non-essential technical characteristic of increase and decrease be actually needed, to meet the needs of different situations.

Claims (10)

  1. A kind of 1. hydraulic casing centralizer, it is characterised in that including mandrel, fluid cylinder set, unidirectional spacing ring, shear pin, help it is 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 groove and the second annular groove, first annular chamber, the second ring are formed between the outer wall of first annular groove and mandrel Form the second annular chamber between connected in star and the outer wall of mandrel, be radially provided with the side wall of mandrel can by the inside of mandrel with The inlet opening of first annular chamber connection, being provided with the second annular chamber can be first annular along the piston cylinder in axial sliding of mandrel Chamber connects 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. 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 is provided with the first limited ring groove, the first fixation is installed with the first limited ring groove Baffle ring, upper interstage sleeve are arranged on the outside of mandrel and are 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, and 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. 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. 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 fix baffle ring and lower interstage sleeve, and peace vertically is provided with inside the second reducing sleeve 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 the second limited impression, is installed with inside the second limited impression 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 form the 8th annular groove, the second annular with the lower inner wall of double thread baffle ring 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 are 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. 5. according to the hydraulic casing centralizer described in 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 are 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. 6. according to the hydraulic casing centralizer described in 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. 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 Limited ring groove and the 4th limited ring groove, are installed with the 3rd fixation baffle ring in the 3rd limited ring groove, solid in 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. 8. according to the hydraulic casing centralizer described in 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 is provided with the first closure gasket groove and the second closure gasket groove, and the first sealing ring is provided with the first closure gasket groove, 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, and the 3rd The 3rd sealing ring is provided with closure gasket groove, the 4th sealing ring is provided with the 4th annular groove.
  9. 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 is provided with the first closure gasket groove and the second closure gasket groove, and the first sealing ring, the second closure gasket groove are provided with the first 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, in the 3rd closure gasket groove Provided with the 3rd sealing ring, the 4th sealing ring is provided with the 4th annular groove.
  10. 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 are 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 is provided with the first closure gasket groove, second seals 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 The 3rd sealing ring is provided with groove, the 4th sealing ring is provided with the 4th annular groove.
CN201720387137.6U 2017-04-13 2017-04-13 Hydraulic casing centralizer Active CN206707644U (en)

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Application Number Priority Date Filing Date Title
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CN206707644U true CN206707644U (en) 2017-12-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107120073A (en) * 2017-04-13 2017-09-01 中国石油集团西部钻探工程有限公司 Hydraulic casing centralizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107120073A (en) * 2017-04-13 2017-09-01 中国石油集团西部钻探工程有限公司 Hydraulic casing centralizer

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Effective date of registration: 20201110

Address after: 100120 Beijing Xicheng District six laying Kang

Patentee after: CHINA NATIONAL PETROLEUM Corp.

Patentee after: CNPC Xibu Drilling Engineering Co.,Ltd.

Address before: 830026 science and technology management division, West drilling and Drilling Engineering Institute, No. 326 South Central Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region, China

Patentee before: CNPC Xibu Drilling Engineering Co.,Ltd.