CN102459803B - Dual rotary centralizer for a borehole - Google Patents
Dual rotary centralizer for a borehole Download PDFInfo
- Publication number
- CN102459803B CN102459803B CN201080024565.3A CN201080024565A CN102459803B CN 102459803 B CN102459803 B CN 102459803B CN 201080024565 A CN201080024565 A CN 201080024565A CN 102459803 B CN102459803 B CN 102459803B
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- Prior art keywords
- centralizer
- cylinder
- blade
- double rotating
- ring
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Classifications
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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
- E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
Abstract
The present invention relates to an apparatus for use in a wellbore, which comprises two rotating bodies (1, 11) and a ring (4). The said rotating bodies rotate clockwise or anticlockwise on its own axis. Preferably, the present invention provides a dual rotary centralizer with a unique dual rotating design with an advantage of an integral stop. This combination enables a free rotation on the axis of the casing pipe which allows easy casing rotation while the dual rotary centralizer stays in its position onto the casing pipe eliminating altogether the need for stop collars. The clockwise and anticlockwise rotation of two bodies induces extra swirl action.
Description
Technical field
The present invention is the double rotating boring centralizer being applicable in the boring of recover petroleum or natural gas.More precisely, this invention is one, on ring, two rotary heads is housed, the dual body that can press clockwise or counterclockwise rotate around Pivot Point Center.
Background technology
The exploitation of the hydrocarbons such as oil and natural gas is a very complicated process.The construction of traditional oil and natural gas well is all generally to utilize the end rotation of single rotary head at bull stick.Bull stick utilizes multiple sleeve pipes to remain on firmly the vertical axis invariant position of boring, and these sleeve pipes are fixed on bull stick according to certain intervals in advance, namely common people's said " centralizer ", and then be fixed between boring internal diameter and sleeve pipe external diameter by cement.The thick and heavy mud staying after drilling operation finishes is exactly the cause due to these cement.Ideally, sleeve pipe can rotate or longitudinal reciprocating motion, to ensure that cement is uniformly distributed around it along the length of sleeve pipe.
Centralizer is normally fixed on tubing string along tubing string according to certain intervals, such as casing string, is for the exterior wall of separation sleeve tubing string and the hole wall of the boring of casing string has been installed.This method is used for boring traditional peupendicular hole very much.When problem just appears at rat holing, we need to hole by certain angle at certain position of peupendicular hole.Specifically, with the change due to bull stick direction, huge side pressure has been transferred on centralizer.And current underload centralizer probably can cause staying in well fragment.
Secondly,, in order to make sleeve pipe remain on wellhole center, industry is also attached to the concentrated blade assembly of jacket exterior always in use.These blade assemblies are along the length of sleeve pipe according to same intervals and fixed screw, and thing such as pincers neck grade together fixes.A problem of these blade assemblies is that, due to rotation or the reciprocating motion of sleeve pipe, they often can become loose, then slide along sleeve pipe.So, they will often be gathered in one or more places, cause sleeve pipe to be difficult to maintain drill center, have also just reduced the quality of well cementing operation.Also have a problem to be, because blade assembly is in the high torque (HT) rotation lower slider of sleeve pipe, fixed screw often can scratch sleeve pipe.These designated ports have reduced the integrality of sleeve pipe.Another problem of original technology is, these equipment are not emphasized around lubricated, quiet of centralizer, reduce frictional flow requirements of one's work, to help to discharge the drilling mud of thickness, reduce pump pressure.The subject matter of early stage solid centralizer is that it cannot ensure the normal rotation of sleeve pipe, can not remove from original place in transferring sleeve pipe.
What U.S. Patent number 5095981 represented is a kind of casing stabbing board being made up of a continuous tubular metal body of circumference, and this metallic object and a bulk of sleeve pipe are combined closely.Multiple sheet metals on it, are fixed, they uniformly-spaced extend along the external diameter of metallic object and the axis parallel of metallic object according to same, the two ends of each blade are outwards relative with taper, and have relatively wide external surface, are used for bearing wellhole or are used for the pressure of the outer tube of processing sleeve pipe.This centralizer is equipped with screw, and by the aperture on some blade and metallic object, these screws can be used for catching sleeve pipe, to fix centralizer.
What U.S. Patent number 6006830 represented is a kind of casing stabbing board being made up of annular solid, centre have one greatly circular hole longitudinally through this annular solid, the blade that is with a series of longitudinal extensions is outward centered around around annular solid, be used for determining the path between every pair of adjacent knife blades, each path can provide the fluid flow path between the upper and lower two ends of centralizer, the outward flange of blade is radial, the contact surface that formation can contact with boring.Circular hole size through annular solid is just in time applicable to being enclosed within around sleeve pipe, utilizes the casing stabbing board fixed center of above saying.This centralizer is to be made up of a kind of material that contains zinc or kirsite completely.
Carry out again one of feature with reference to original technical centralizer of discussing before us, as spacing ring.This feature is a spacing ring to be housed at the two ends of each centralizer ensure rotating freely of centralizer.
Therefore spacing ring is equipped with at the two ends of each centralizer.Want to use Bidirectional stabilizing device, just spacing ring must be vertically fixed between sliding end, and sliding end must fixedly secure the end at semielliptic spring, and spacing ring is fixed on to the outside of sleeve pipe, sleeve pipe must remain on drill center.Such configuration provides desirable two-way function to centralizer, because centralizer can be not slack and undisciplined, and can slide along with sleeve pipe, thereby enter in larger sleeve pipe, until sleeve pipe is foremost, and near spacing ring.The longitudinal extension of centralizer make tail end be towards away from the direction motion of the close front end of spacing ring.
It is that the thickness of spacing ring can not be toppled over centralizer rib completely to internal diameter that spacing ring is vertically fixed in to problem between sliding end, and is attached on the sleeve pipe of movably having fixed centralizer along casing length.This makes spacing ring occupy valuable annular space, also just can not make subsequent casings reach desirable effect.
Typical centralizer is Lirette centralizer, U.S. Patent number 5575333.That this centralizer utilizes is removable, spring bow separates sleeve pipe and borehole wall flexibly.Lirette centralizer contains threaded end (TE), can in outer tube, connect as casing coupling the each several part of inner sleeve.But this removable, spring bow probably stops the rotation of sleeve pipe in boring flexibly, because spring bow is not to be used for specially bearing high torque (HT) that sleeve pipe produces in the rotation of boring inner surface.But current this is equipped with the invention of two rotary heads to rotate at both direction, therefore in the time of well cementation, can produce extra whirlpool.These two rotary heads can be not floating between spacing ring, even because centralizer is fixed, they still can rotate very easily, and this is because these two rotary head meetings self are rotated along with the rotation of sleeve pipe.
The boring centralizer that U.S. Patent number 4830105 represents has an elongated handle, has slidably body relatively on handle, and these two relative bodies are connected with joint arm movably.What U.S. Patent number 5261488 represented is the equipment that is applicable to transfer sleeve with spring, and this invention needs an extra energising equipment to increase flexural spring band.
These all equipment have their problems separately.Generally speaking, the cause of these problems is because centralizer is the additional thing of sleeve pipe.Like this, they enter in boring, but can not in boring, keep their position, and when they move, often get into sleeve surface.More very, they can not accomplish to allow cement be evenly distributed on sleeve pipe.These all equipment all need to improve, so that sleeve pipe can be fixed on sleeve and can rotate easily to increase whirlpool.
Although these equipment have successfully used a lot of years in boring condensation process, in mud discharge process, the effect jointly rotating freely of sleeve pipe and centralizer but cannot be satisfactory.The improper homogeneity well cementing process that finally can affect of rotation of sleeve pipe, also just can not form annular space.In these cases, bad leak case can happen occasionally.Such leakage is very disadvantageous to the sealing of long-term integrality and cement sheath, and the amplitude of this leakage often reduces or stops leakage to our remedial measure of need to implementing to cement the well greatly.Such leakage may cause a large amount blowout in the short time after cement is filled and before preliminary sedimentation.
In addition, the centralizer of original technology faces a subject matter on sleeve rotating.The solid centralizer of original technology can not ensure the good rotation of sleeve pipe or be shifted in the time transferring sleeve pipe.In the time that sleeve pipe moves reciprocatingly, centralizer can be moved again subsequently, and in the time that sleeve is removed, can not keep stable.
Drilling engineers, finding a product that can substitute common centralizer, make centralizer be fixed on sleeve pipe and can allow sleeve pipe easily rotate and increase whirlpool for many years.
For this reason, in boring, use high-quality centralizer and maintain perfect sleeve rotating just become a permanent demand and be accustomed to.Therefore, the double rotating centralizer of inventing in prior art utilizes two rotary heads of centralizer, has overcome the problem of original technical sleeve rotating.These two rotary heads rely on allene screws to be fixed on sleeve, and around Pivot Point Center along with centralizer is together with clockwise and counterclockwise rotation.
For early stage solid centralizer, best bet is exactly that centralizer is floated on to the normal rotation that ensures sleeve pipe between spacing ring, but utilizes existing double rotating centralizer, even if centralizer has been fixed, does not also need to be floated between spacing ring.Centralizer can rotate easily, because two rotary heads self also can be rotated along with the rotation of sleeve pipe, has got rid of the demand of two spacing rings.Current equipment provides two functions of spacing ring, because it makes centralizer bidirectional-movement and keeps stable, has therefore solved original technical problem.
Secondly,, due to upper and lower two rotary heads separately rotation separately, centralizer can produce extra whirlpool in pump mud process.The fact has proved to utilize eddy current induction equipment to be conducive to well cementing operation.
The dual body of present invention has overcome these all problems.It can bear sleeve pipe and does the high torque (HT) when rotating and moving back and forth and can not slide, and in ensureing that cement is smooth, easily drilling mud is excluded, and reduces and inserts pressure and pump slurry pressure, and increase cement flow.
Summary of the invention
The object of this invention is the centralizer for a bidirectional rotation is provided.
Another object is in order to provide one can do clockwise and the double rotating centralizer being rotated counterclockwise around Pivot Point Center.
Another object be for provide one can be in the time rotating around Pivot Point Center the centralizer of free floating.
Another object is the method in order to provide to utilize this centralizer to carry out sleeve righting in oil or the natural gas well.
From one or more aspects, another object is in order to meet industrial requirement mentioned above.
Another object is the centralizer in order to provide to be specially adapted for two rotary head rotations of well cementing operation.
Another object is in order to provide an energy to put into the double rotating centralizer of boring together with cover interface tube.The other end in axle center can be in the time that free fluid rotates and the other end of centralizer put into boring.
Another object is that cost is low for an economy is provided, the high and easy-operating double rotating centralizer of effectiveness.
According to present invention feature, this has been to provide the equipment of the interior use that is adapted at holing, this equipment configuration two rotary heads and a ring.These two rotary heads are done round the axle center of self clockwise and are rotated counterclockwise.
Ideally, upper and lower two rotary heads have and can in the time of well cementing operation, improve the blade of eddy motion.Upper and lower two rotary heads can be according to operation need to adjust angle.These two rotary heads are fixed on a ring with locking device.
This centralizer has a function, and after centralizer is by built-in lock screw permanent position, two rotary heads of centralizer can be done around the axle center of spacing ring clockwise and motion counterclockwise.
Therefore current invention, about in a boring that is used in recover petroleum or the natural gas well and the double rotating centralizer of the method for righting sleeve, be to have two rotary heads that are fixed on ring about one, can do around the axle center of self clockwise and the centralizer being rotated counterclockwise.
Brief description of the drawings
By mentioned above, in conjunction with the analysis diagram of extention in manual, we can the more careful object of understanding exactly this invention.
Fig. 1 is the overall perspective of present invention.
Figure 1A and 1B are the upper cylindrical front perspective views that centralizer shown in Fig. 1 uses.
Fig. 1 C and 1D are the front perspective views of the ring of the use of centralizer shown in Fig. 1.
Fig. 1 E is similar with 1B to Figure 1A with 1F, but demonstration is the lower cylinder of centralizer shown in Fig. 1.
Fig. 2 is another phantom drawing of present invention.
Fig. 2 A and 2B are the cylindrical front perspective views of the upper part that uses in the centralizer in Fig. 2.
The front perspective view of the ring using in the centralizer in Fig. 2 C and 2D Fig. 2.
Fig. 2 E is similar with 2B to Fig. 2 A with 2F, but displaying is that in Fig. 2, cylinder is divided in the bottom of centralizer.
Fig. 3 is another phantom drawing of the centralizer of present invention.
Fig. 3 A and 3B are the upper cylindrical front perspective views that centralizer shown in Fig. 3 uses.
Fig. 3 C and 3D are the front perspective views of the ring that uses in centralizer shown in Fig. 3.
Fig. 3 E is similar with 3B to Fig. 3 A with 3F, but displaying is the lower cylinder of centralizer in Fig. 3.
Fig. 4 is another phantom drawing of present invention.
Fig. 4 A and 4B are the upper cylindrical front perspective views of centralizer in Fig. 4.
Fig. 4 C and 4D are the front perspective views of ring that centralizer uses shown in Fig. 4.
Fig. 4 E is similar with 4B to Fig. 4 A with 4F, but displaying is the lower cylinder that shown in Fig. 4, centralizer uses.
Fig. 5 is another phantom drawing of the centralizer of present invention.
Fig. 5 A and 5B are the upper cylindrical front perspective views that shown in Fig. 5, centralizer uses.
Fig. 5 C and 5D are the front perspective views of the ring that shown in Fig. 5, centralizer uses.
Fig. 5 E is similar with 5B to Fig. 5 A with 5F, but displaying is the lower cylinder that shown in Fig. 5, centralizer uses.
Fig. 6 is another phantom drawing of the centralizer of present invention.
Fig. 6 A and 6B are the upper cylindrical front perspective views that shown in Fig. 6, centralizer uses.
Fig. 6 C and 6D are the front perspective views of the ring that shown in Fig. 6, centralizer uses.
Fig. 6 E is similar with 6B to Fig. 6 A with 6F, but displaying is the lower cylinder that shown in Fig. 6, centralizer uses.
Detailed description of the invention
Present invention is an equipment that is applicable to boring, and it is equipped with two rotary heads and a ring, and these two rotary heads are done around the axle center of self clockwise and are rotated counterclockwise.This invention is a double rotating centralizer, is equipped with the design of unique double rotating, has and can force the advantage that stops.Such combination can allow rotary head rotate freely around the axle center of sleeve, and like this, even if double rotating centralizer remains on sleeve, sleeve pipe also can easily rotate, without any spacing ring.Two rotary heads can increase clockwise and counterclockwise eddy motion.
In addition,, even in mud, the locking device that this double rotating centralizer adopts also can make sleeve pipe easily rotate.They have high abrasion, reduce the functions such as torque, and can increase the whirlpool of cement paste.Within these two rotary heads can guarantee that axle shearing pressure maintains the scope of elastic band.
This invention also available following information further defines:
According to Fig. 1, this centralizer is equipped with spacing ring-4, upper cylinder-1, lower cylinder-10 and blade-2,3 of combining closely with these two cylinders and installing by equal angular.Flat head screw-5 and screw thread-8 alternative arrangement on ring.Cylinder ring and two ends, annular groove-9 equal diameter, just in time engage with cylinder.There are groove-6 and engagement of loops in upper and lower cylindrical one end, to form the centralizer of a bidirectional rotation.The boring in the environment for use of centralizer is depended in wall thickness-7 of upper cylinder-1 and lower cylinder-10.
Each blade is not only arranged between longitudinally relative upper and lower cylindrical two ends, is also centered around the periphery of centralizer.The direction of blade guarantees that their outward flange-3 separately can jointly form a complete boring contact surface around centralizer, and increases whirlpool, helps cleaning boring.
According to Figure 1A and 1B, there are groove-6 one end of upper cylinder-1, is suitable for merging and forming bidirectional rotation centralizer with articulating.Upper cylindrical wall thickness should depend on the boring in its operating environment.There are one group of blade-2 of arranging by equal angular, 3 in the surface of upper cylinder-1.
According to Fig. 1 C and 1D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, ring and upper and lower cylinder size to fit, to form a complete unified centralizer.Cylinder ring two ends are identical with cannelure-9 diameter, just in time engage with cylinder.
According to Fig. 1 E and 1F, there are groove-6 at two ends, lower cylinder-1, just in time with engagement of loops, and form the centralizer of a bidirectional rotation.The boring in centralizer operating environment is depended in thickness-7 of lower cylindrical wall.The surface of lower cylinder-1 has one group by blade-2 of the equidistant arrangement of equal angular, 3.
According to Fig. 2, centralizer is equipped with ring 4, upper cylinder-9, and lower cylinder-1 and one group is by blade-2 of the equidistant arrangement of equal angular, and 3,10,11, combine closely in these blades and upper cylinder-9 and lower cylinder-1.On ring, there are flat head screw-5 and screw thread-8 alternative arrangement.Cylinder two ends are identical with diameter of ring groove size, just in time engage with cylinder.There are groove-12 at upper cylinder two ends, just in time merge with articulating the centralizer that forms a bidirectional rotation.Top, groove-6 can merge the centralizer that forms a bidirectional rotation with articulating.The thickness 13,7 of upper cylinder-9 and lower cylinder-1 wall separately depend on centralizer use environment in boring.
Each blade not only extends between upper cylinder-9 of longitudinal extension and the two ends of lower cylinder-1, and is centered around centralizer around.The direction of blade makes their outward flange-3 separately, and 12 jointly form a complete boring contact surface around centralizer, and increase eddy current, help cleaning boring.
According to Fig. 2 A and 2B, there are groove-12 at the two ends of upper cylinder-9, are just being better than engagement of loops and are forming the centralizer of a bidirectional rotation.The thickness 13 of the wall of upper cylinder-9 depends on the well bore of centralizer environment for use.The surface of upper cylinder-9 has one group by blade-10 of the equidistant arrangement of equal angular, 11.
According to Fig. 2 C and 2D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, just in time engage and form a complete unified centralizer with upper and lower cylinder.
According to Fig. 2 E and 2F, one end of lower cylinder-1 have groove-6 can with engagement of loops, to form the centralizer of a bidirectional rotation.The boring in the environment for use of centralizer is depended in thickness-7 of lower cylindrical wall.The surface of lower cylinder-1 has one group by blade-2 of the equidistant arrangement of equal angular, 3.
According to Fig. 3, centralizer is equipped with ring 4, upper cylinder-9, and blade-10 of lower cylinder-9 and one group of equidistant arrangement of equal angular, 11, combine closely in these blades and upper cylinder-9 and lower cylinder-9.On ring, there are flat head screw-5 and screw thread-8 alternative arrangement.Cylinder two ends are identical with diameter of ring groove size, just in time engage with cylinder.There are groove-12 upper cylinder one end, just in time merges with articulating the centralizer that forms a bidirectional rotation.Top, groove-6 can merge the centralizer that forms a bidirectional rotation with articulating.The thickness 13 of the wall of upper and lower cylinder-9 depends on the boring in the environment that centralizer uses.
Each blade not only extends between upper cylinder-9 of longitudinal extension and the two ends of lower cylinder-9, and is centered around centralizer around.The direction of blade makes their outward flange-11 separately complete boring contact surface of common formation around centralizer, and increases eddy current, helps cleaning boring.
According to Fig. 3 A and 3B, there are groove-12 at the two ends of upper cylinder-9, just in time merge with articulating the centralizer that forms a bidirectional rotation.The thickness 13 of the wall of upper cylinder-9 depends on the boring in centralizer environment for use.The surface of upper cylinder-9 has one group by blade-10 of the equidistant arrangement of equal angular, 11.
According to Fig. 3 C and 3D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, just in time engage and form a complete unified centralizer with upper and lower cylinder.
According to Fig. 3 E and 3F, one end of lower cylinder-9 have groove-12 can with engagement of loops, to form the centralizer of a bidirectional rotation.The boring in the environment for use of centralizer is depended in thickness-13 of lower cylindrical wall.The surface of lower cylinder-9 has one group by blade-10 of the equidistant arrangement of equal angular, 11.
According to Fig. 4, centralizer is equipped with ring 4, upper cylinder-14, and blade-2 of lower cylinder-1 and one group of equidistant arrangement of equal angular, 3,15,16, combine closely in blade and upper cylinder-14 and lower cylinder-1.On ring, there are flat head screw-5 and screw thread-8 alternative arrangement.Cylinder two ends are identical with diameter of ring groove size, just in time engage with cylinder.There are groove-17 upper cylinder one end, just in time merges with articulating the centralizer that forms a bidirectional rotation.Top, groove-6 can merge the centralizer that forms a bidirectional rotation with articulating.The thickness 18,7 of the wall of upper cylinder-14 and lower cylinder-1 depend on centralizer use environment in boring.
Each blade not only extends between longitudinally relative upper cylinder-14 and the two ends of lower cylinder-1, and is centered around centralizer around.The direction of blade makes their outward flange-3 and 16 separately complete boring contact surface of common formation around centralizer, and increases eddy current, helps cleaning boring.
According to Fig. 4 A and 4B, there are groove-17 one end of upper cylinder-14, just in time merges with articulating the centralizer that forms a bidirectional rotation.The thickness 18 of the wall of upper cylinder-14 depends on the boring in centralizer environment for use.The surface of upper cylinder-14 has one group by blade-15 of the equidistant arrangement of equal angular, 16.
According to Fig. 4 C and 4D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, just in time engage and form a complete unified centralizer with upper and lower cylinder.
According to Fig. 4 E and 4F, one end of lower cylinder-1 have groove-6 can with engagement of loops, to form the centralizer of a bidirectional rotation.The boring in the environment for use of centralizer is depended in thickness-7 of lower cylindrical wall.The surface of lower cylinder-1 has one group by blade-2 of the equidistant arrangement of equal angular, 3.
According to Fig. 5, centralizer is equipped with ring 4, upper cylinder-14, and blade-10 of lower cylinder-1 and one group of equidistant arrangement of equal angular, 11,15,16, combine closely in blade and upper cylinder-14 and lower cylinder-9.On ring, there are flat head screw-5 and screw thread-8 alternative arrangement.Cylinder two ends are identical with diameter of ring groove size, just in time engage with cylinder.There are groove-17 upper cylinder one end, just in time merges with articulating the centralizer that forms a bidirectional rotation.Top, groove-12 can merge the centralizer that forms a bidirectional rotation with articulating.The thickness 18,13 of upper cylinder-14 and lower cylinder-9 wall separately depend on centralizer use environment in boring.
Each blade not only extends between longitudinally relative upper cylinder-14 and the two ends of lower cylinder-9, and is centered around centralizer around.The direction of blade makes their outward flange-11 and 16 separately complete boring contact surface of common formation around centralizer, and increases eddy current, helps cleaning boring.
According to Fig. 5 A and 5B, there are groove-17 one end of upper cylinder-14, just in time merges with articulating the centralizer that forms a bidirectional rotation.The thickness 18 of the wall of upper cylinder-14 depends on the boring in centralizer environment for use.The surface of upper cylinder-14 has one group by blade-15 of the equidistant arrangement of equal angular, 16.
According to Fig. 5 C and 5D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, just in time engage and form a complete unified centralizer with upper and lower cylinder.
According to Fig. 5 E and 5F, one end of lower cylinder-9 have groove-12 can with engagement of loops, to form the centralizer of a bidirectional rotation.The boring in the environment for use that thickness-13 of cylindrical wall depend on centralizer is divided in bottom.The surface of lower cylinder-1 has one group by blade-10 of the equidistant arrangement of equal angular, 11.
According to Fig. 6, centralizer is equipped with ring 4, upper cylinder-14, and blade-15 of lower cylinder-14 and one group of equidistant arrangement of equal angular, 16, blade and top divide cylinder-14 and bottom to divide cylinder-14 to combine closely.On ring, there are flat head screw-5 and screw thread-8 alternative arrangement.Cylinder two ends are identical with diameter of ring groove size, just in time engage with cylinder.There are groove-17 upper cylinder one end, just in time merges with articulating the centralizer that forms a bidirectional rotation.The thickness 18 of the wall of upper and lower cylinder-14 depends on the boring in the environment that centralizer uses.
Each blade not only extends between longitudinally relative upper cylinder-14 and the two ends of lower cylinder-14, and is centered around centralizer around.The direction of blade makes their outward flange-16 separately complete boring contact surface of common formation around centralizer, and increases eddy current, helps cleaning boring.
According to Fig. 6 A and 6B, top divides one end of cylinder-14 to have groove-17, just in time merges with articulating the centralizer that forms a bidirectional rotation.The thickness 18 of the wall of upper cylinder-14 depends on the well bore of centralizer environment for use.The surface of upper cylinder-14 has one group by blade-15 of the equidistant arrangement of equal angular, 16.
According to Fig. 6 C and 6D, on ring, there are flat head screw-5 and screw thread-8 alternative arrangement, just in time engage and form a complete unified centralizer with upper and lower cylinder.
According to Fig. 6 A and 6B, top divides one end of cylinder-14 to have groove-17, just in time merges with articulating the centralizer that forms a bidirectional rotation.The thickness 18 of the wall of upper cylinder-14 depends on the well bore of centralizer environment for use.The surface of upper cylinder-14 has one group by blade-15 of the equidistant arrangement of equal angular, 16.
The blade of centralizer remains in boring tubulose centralizer, and bears the pressure at boring interior wall, reduces friction.
In an analysis diagram, the direction of blade is fixed on cylindrical surface left and with the angle of 15 ° to 35 °.
In another analysis diagram, the direction of blade is fixed on cylindrical surface to the right and with the angle of 15 ° to 35 °.
In another analysis diagram, blade is vertical, is fixed on cylindrical surface with the angle of 90 °.
In another analysis diagram, whole centralizer is treated as an entirety (being installed to again on cylinder although particular requirement can be installed separately and install in blade-10).
In another analysis diagram, the main body of centralizer is by zinc or kirsite, aluminum or aluminum alloy, the metals such as iron and steel or steel and alloy and phenolic resins and various resin material composition.
In another analysis diagram, the main body of centralizer is made up of kirsite, is ZAMAC-12 ideally.
Also have in an analysis diagram, the main body of centralizer is made up of aluminium alloys, is ALUM-6 ideally.
Also have in an analysis diagram, centralizer main body is made up of phenolic resins and various resin material, is HNBR ideally.
In another analysis diagram, blade can be wrapped with teflin tape.
The cylinder up and down of centralizer has blade, and these blades can improve eddy motion in the time of well cementing operation.These two cylinders are fixed on ring with locking device.This double rotating centralizer can at one end engage with casing coupling, engages with the one end in axle center at the other end.The other end in axle center can engage and rotate freely with the miscellaneous part of centralizer and rotatablely move.
In an analysis diagram, blade can rotate in reducing sleeve pipe, and two rotary heads still can remain on original position.
The staff of skilled this operation is easy to just can understand other transformations about this invention and change by explanation above.Therefore, because we have only used the analysis diagram of minority to resolve to this invention, clearly, do not departing from outside this scope of invention and object, we also may make an amendment.
Claims (10)
1. a double rotating centralizer, is characterized in that: be equipped with:
A ring (4),
One is longitudinally arranged on the cylinder (1) of the top edge of ring,
One is longitudinally arranged on the cylinder of the lower limb of ring, and
One group by the equidistant arrangement of equal angular, the blade (10) of combining closely with upper and lower cylinder;
The cylinder of described top edge and the cylinder of lower limb can be around the axle center rotations of self.
2. double rotating centralizer as claimed in claim 1, is characterized in that: on described ring, have flat head screw (5) and screw thread (8) alternative arrangement.
3. double rotating centralizer as claimed in claim 1 or 2, is characterized in that: the diameter at the two ends of the ring in described double rotating centralizer is identical with the diameter of annular groove (9), just in time engages with cylinder.
4. double rotating centralizer as claimed in claim 1, is characterized in that: in described double rotating centralizer the one group blade by the equidistant arrangement of equal angular has upper surface (3) and soffit (2).
5. the double rotating centralizer as described in claim 1 or 4, is characterized in that: the blade in described double rotating centralizer extends between the two ends that cylinder is relative with lower cylinder.
6. double rotating centralizer as claimed in claim 5, is characterized in that: the blade in described double rotating centralizer is centered around the surface of centralizer.
7. double rotating centralizer as claimed in claim 6, is characterized in that: the blade in described double rotating centralizer is left, to the right or vertically.
8. double rotating centralizer as claimed in claim 7, is characterized in that: the blade to the left or to the right in described double rotating centralizer is installed according to the angle of 15 ° to 35 °.
9. double rotating centralizer as claimed in claim 7, is characterized in that: the vertical blade in described double rotating centralizer is to install according to the angle of 90 °.
10. double rotating centralizer as claimed in claim 1, is characterized in that: the direction of described upper cylinder and lower cylindrical blade all left, all to the right, equal vertical, right vertical, a vertical left side or vertical right sides in vertical or the first from left right side, a right left side, a first from left.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN1164/DEL/2009 | 2009-06-08 | ||
| IN1164DE2009 | 2009-06-08 | ||
| PCT/IN2010/000372 WO2010143201A2 (en) | 2009-06-08 | 2010-06-07 | Dual rotary centralizer for a borehole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102459803A CN102459803A (en) | 2012-05-16 |
| CN102459803B true CN102459803B (en) | 2014-09-03 |
Family
ID=43309301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201080024565.3A Expired - Fee Related CN102459803B (en) | 2009-06-08 | 2010-06-07 | Dual rotary centralizer for a borehole |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20120073803A1 (en) |
| EP (1) | EP2440739B1 (en) |
| CN (1) | CN102459803B (en) |
| WO (1) | WO2010143201A2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9556994B2 (en) | 2009-06-30 | 2017-01-31 | Antelope Oil Tool & Mfg. Co. | Wrap-around band and sleeve attachment apparatus for an oilfield tubular |
| WO2011100537A1 (en) * | 2010-02-15 | 2011-08-18 | Frank's International, Inc. | Device and method for affecting the flow of fluid in a wellbore |
| US20150275588A1 (en) * | 2012-10-24 | 2015-10-01 | Tdtech Limited | Centralisation system |
| US9534475B2 (en) | 2013-05-27 | 2017-01-03 | Landmark Graphics Corporation | GUI-facilitated centralizing methods and systems |
| WO2015026669A1 (en) * | 2013-08-17 | 2015-02-26 | Antelope Oil Tools & Mfg. Co., Llc | Multi-vane centralizer and method of forming |
| WO2015026671A1 (en) | 2013-08-17 | 2015-02-26 | Antelope Oil Tools & Mfg. Co., Llc | Wrap-around band and sleeve attachment apparatus for an oilfield tubular |
| GB2560674B (en) * | 2015-12-23 | 2021-05-05 | Friction Tool Solutions Inc | Apparatus for mounting on a tubular structure |
| CN106089120A (en) * | 2016-04-07 | 2016-11-09 | 西南石油大学 | Big V-type rotary coupling centralizer |
| CN106050165A (en) * | 2016-08-22 | 2016-10-26 | 刘明晓 | Rigid centralizer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2659439A (en) * | 1949-12-27 | 1953-11-17 | Baker Oil Tools Inc | Centering device for well casings |
| US4635736A (en) * | 1985-11-22 | 1987-01-13 | Shirley Kirk R | Drill steering apparatus |
| US4984633A (en) * | 1989-10-20 | 1991-01-15 | Weatherford U.S., Inc. | Nozzle effect protectors, centralizers, and stabilizers and related methods |
| CN2573654Y (en) * | 2002-07-16 | 2003-09-17 | 赵科昌 | Pumping rod collar rotating centering guide |
| CN1932232A (en) * | 2006-10-20 | 2007-03-21 | 赵科昌 | Double-rotary sucker rod centering guide |
| CN2911172Y (en) * | 2006-07-11 | 2007-06-13 | 李凡 | Rotary sucker rod string centralizer |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2622684A (en) * | 1950-01-26 | 1952-12-23 | Kluck Louis | Rib type casing centralizer |
| US4830105A (en) | 1988-02-08 | 1989-05-16 | Atlantic Richfield Company | Centralizer for wellbore apparatus |
| US4984644A (en) | 1989-01-19 | 1991-01-15 | Mid-America Scale, Inc. | Overhead lever torque suspension weighing scale |
| CA2073332C (en) | 1990-01-17 | 1999-09-28 | Paul Douglas Maxfield Gullet | Centralizers for oil well casings |
| US5575333A (en) | 1995-06-07 | 1996-11-19 | Weatherford U.S., Inc. | Centralizer |
| GB0016145D0 (en) * | 2000-06-30 | 2000-08-23 | Brunel Oilfield Serv Uk Ltd | Improvements in or relating to downhole tools |
| FR2843418B1 (en) | 2002-08-08 | 2005-12-16 | Smf Internat | DEVICE FOR STABILIZING A ROTARY DRILL ROD TRAIN WITH REDUCED FRICTION |
| US7096940B2 (en) * | 2003-10-20 | 2006-08-29 | Rti Energy Systems, Inc. | Centralizer system for insulated pipe |
| US7308955B2 (en) * | 2005-03-22 | 2007-12-18 | Reedhycalog Uk Limited | Stabilizer arrangement |
-
2009
- 2009-06-08 US US13/376,961 patent/US20120073803A1/en not_active Abandoned
-
2010
- 2010-06-07 EP EP10744741.9A patent/EP2440739B1/en not_active Not-in-force
- 2010-06-07 CN CN201080024565.3A patent/CN102459803B/en not_active Expired - Fee Related
- 2010-06-07 WO PCT/IN2010/000372 patent/WO2010143201A2/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2659439A (en) * | 1949-12-27 | 1953-11-17 | Baker Oil Tools Inc | Centering device for well casings |
| US4635736A (en) * | 1985-11-22 | 1987-01-13 | Shirley Kirk R | Drill steering apparatus |
| US4984633A (en) * | 1989-10-20 | 1991-01-15 | Weatherford U.S., Inc. | Nozzle effect protectors, centralizers, and stabilizers and related methods |
| CN2573654Y (en) * | 2002-07-16 | 2003-09-17 | 赵科昌 | Pumping rod collar rotating centering guide |
| CN2911172Y (en) * | 2006-07-11 | 2007-06-13 | 李凡 | Rotary sucker rod string centralizer |
| CN1932232A (en) * | 2006-10-20 | 2007-03-21 | 赵科昌 | Double-rotary sucker rod centering guide |
Also Published As
| Publication number | Publication date |
|---|---|
| US20120073803A1 (en) | 2012-03-29 |
| EP2440739A2 (en) | 2012-04-18 |
| WO2010143201A3 (en) | 2011-05-05 |
| CN102459803A (en) | 2012-05-16 |
| EP2440739B1 (en) | 2016-03-09 |
| WO2010143201A2 (en) | 2010-12-16 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140903 Termination date: 20170607 |