CN201843570U - Bidirectional bearing packer - Google Patents
Bidirectional bearing packer Download PDFInfo
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- CN201843570U CN201843570U CN2010205969998U CN201020596999U CN201843570U CN 201843570 U CN201843570 U CN 201843570U CN 2010205969998 U CN2010205969998 U CN 2010205969998U CN 201020596999 U CN201020596999 U CN 201020596999U CN 201843570 U CN201843570 U CN 201843570U
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Abstract
The utility model discloses a bidirectional bearing packer, which is applied to the fracturing transform for an oil-gas well in the barefoot well completion way. The lower end of an upper joint is sheathed with an upper compression sleeve; an upper central tube is connected with the lower end of the inner wall of the upper joint by screw thread; the lower part of the upper joint is provided with an upper annular piston; and the upper central tube is provided with an upper liquid inlet hole. An upper supporting ring of an upper rubber cylinder, an upper conical ring of the upper rubber cylinder, the upper rubber cylinder, a lower conical ring of the upper rubber cylinder, and a lower supporting ring of the upper rubber cylinder are sheathed on the outer wall of the upper central tube; an outer limiting cylinder is arranged at the outer wall of the upper central tube; a lower liquid inlet hole is arranged on the upper central tube; and a lower central tube is connected with the lower end of the upper central tube. The lower central tube is provided with a lower rubber cylinder; and the structure of the two ends of the lower rubber cylinder is the same as the structure of the two ends of the upper rubber cylinder. The lower end of the lower central tube is connected with a lower joint by screw thread; and the two rubber cylinders are respectively arranged at the two ends of the packer, so as to improve the pressure bearing capacity of the packer of a barefoot well with an irregular well hole and larger annular clearance and avoid the packer from set packing in advance caused by the friction of a well wall.
Description
Technical field
The utility model relates to technical field of tools under the oil well, and particularly the downhole packer on the packing stratum of barefoot completion pressure break use is a kind of bidirectional bearing packer.
Background technology
Continuous exploitation along with world petroleum resource, reservoir properties is better, the petroleum resources of relatively easy exploitation is fewer and feweri, therefore a large amount of reservoir properties is poor, the low low-grade petroleum resources of well yield is becoming the main body of producing on the oil, the oil gas field of reservoir properties difference will effectively be developed, it is crucial improving output, and the application that horizontal well is more and more paid attention to as a kind of means that improve hypotonic oil gas field in recent years, effective fracturing reform of hyposmosis horizontal well is a bottleneck technology that faces at present, effective packing problem of staged fracturing in the open-hole horizontal well particularly, its crucial instrument is an open hole packer.
For the well fracturing transformation of cased hole completion mode, present domestic technique comparative maturity, the existing compression packer of the packer of employing also has inflatable packer.For open hole well fracturing reform completion tool, domestic main employing expanding long packing element type open hole packer, packer length is generally longer, all more than 2m, it is bigger to be lowered to risk for the open-hole horizontal well instrument, bearing capacity is also relatively low, and particularly along with the increase of transforming hop count, the security risks that tubing string is lowered to increases.In recent years, the research for open hole packer is abroad changed to compression packer by initial expanding, oil and water contact expansible formula packer, has all adopted compression packer as Bake Hughes's FracPoint, the StageFRAC of Schlumberger, the OptiFrac horizontal well renovation technique of Vad good fortune.For the research of compression open hole well pressure break packer, domestic present research is less relatively.
Chinese patent notice of authorization number: CN201103375Y provides a kind of " two way seal wedging packer ".Comprise top connection, upper cone, central tube, packing element, lower cone and lower contact; The inboard outside, upper end with central tube, the lower end of top connection links together, and the inboard outside, lower end with central tube, the upper end of lower contact links together; Packing element is sleeved on the central tube middle part outside, at the upside and the downside of packing element upper cone and lower cone is arranged respectively, and the inboard of upper cone and lower cone is step-like; The lower end of upper cone is sleeved on the outside of central tube and is stuck in the inboard, upper end of packing element.Owing to have bigger expansion ratio, can be used for cased well, open hole well, also can be used for Vertical Well, horizontal well, can carry out permanent sealing to cased well, reduced cost.
Summary of the invention
The purpose of this utility model is: a kind of bidirectional bearing packer is provided, can makes outwards expansion packing stratum, packing element compression back, simultaneously support set is expanded outwardly, be used for open hole well pressure break packing stratum.
The technical solution of the utility model is: the bidirectional bearing packer, mainly by top connection; last wedging ring; upper piston; last packing element upper support ring; confinement ring on the last packing element; last packing element epicone ring; protective sleeve on the last packing element; last packing element; protective sleeve under the last packing element; conical ring under the last packing element; last packing element lower support ring; confinement ring under the last packing element; spacing urceolus; upper center tube; lower piston; lower center tube; the lower rubber cylinder wedging ring; lower rubber cylinder upper support ring; confinement ring on the lower rubber cylinder; conical ring on the lower rubber cylinder; protective sleeve on the lower rubber cylinder; lower rubber cylinder; protective sleeve under the lower rubber cylinder; conical ring under the lower rubber cylinder; confinement ring under the lower rubber cylinder; lower rubber cylinder lower support ring and lower contact are formed.It is characterized in that:
Be with wedging ring on the lower end outer wall of top connection, last wedging ring is cylindric, uses shear pin between last wedging ring and the top connection and is fixed together, and on the lower end outer wall of top connection cannelure is arranged, lock ring on being equipped with in cannelure has annular groove on the inwall of last wedging ring.When last wedging ring to lower slider and go up lock ring and expand, after last lock ring entered the annular groove of wedging ring, last lock ring can stop the wedging ring continuation to lower slider.Screw thread is connected with upper center tube in the inwall lower end of top connection, forms annular space between upper center tube and last wedging ring, in the annular space between upper center tube and last wedging ring and in the bottom of top connection annular upper piston is arranged; Last wedging ring lower inner wall has inwardly outstanding circular cylinder, and last wedging ring inwall circular cylinder is enclosed within on the outer wall of upper center tube; Inlet opening on having on the upper center tube, the position of last inlet opening is in the bottom of upper piston and on the inwardly outstanding circular cylinder top of last wedging ring; The high pressure liquid physical efficiency that enters upper piston from last inlet opening promotes to go up wedging ring to lower slider.
Be with packing element upper support ring on the outer wall of upper center tube, last packing element upper support ring is formed an annular solid by 3～8 identical back-up blocks; Last packing element upper support ring is in the lower end of last wedging ring, on last packing element upper support ring outer wall, cannelure is arranged, confinement ring on the packing element in the cannelure of last packing element upper support ring, having, confinement ring is an elastic circular ring that has a place to disconnect on the last packing element, and confinement ring can make back-up block close up to become an annular together on the last packing element; The lower surface of last packing element upper support ring is an internal conical surface; Be with packing element epicone ring on the upper center tube, and going up the bottom of packing element epicone ring at last packing element upper support ring; The upper end outer wall of last packing element epicone ring is a taper seat, and the lower end taper seat of last packing element upper support ring is relative with the upper end taper seat of last packing element epicone ring; Be with protective sleeve on the packing element on the outer wall of upper center tube, protective sleeve is in the bottom of last packing element upper support cover on the last packing element; Be with packing element on the outer wall of upper center tube, the bottom of last packing element protective sleeve on last packing element; Be with successively on the outer wall of upper center tube and the bottom at last packing element protective sleeve under the packing element, on conical ring and last packing element lower support ring under the packing element, confinement ring under the packing element in the cannelure of last packing element lower support ring, having; Under the last packing element on the structure of protective sleeve and the last packing element structure of protective sleeve identical, installation direction is opposite; The structure of conical ring is identical with the structure of last packing element epicone ring under the last packing element, and installation direction is opposite; The structure of last packing element lower support ring is identical with the structure of last packing element upper support ring, and installation direction is opposite.
Be with spacing urceolus at the outer wall of upper center tube and in the bottom of last packing element lower support ring, spacing urceolus is cylindric, and spacing urceolus upper inside wall has an inwardly outstanding circular cylinder, and spacing outer tube inner wall circular cylinder is enclosed within on the outer wall of upper center tube; Following inlet opening is arranged on upper center tube, and the position of following inlet opening is in the bottom of the inside circular cylinder of giving prominence to of spacing urceolus; From the thrust that the highly pressurised liquid that descends inlet opening to enter spacing urceolus circular cylinder bottom makes progress for spacing urceolus, the s that enters with last inlet opening equates, spacing urceolus is remained on certain position;
Screw thread is connected with lower center tube in the upper center tube lower end, forms annular space between lower center tube outer wall and the spacing outer tube inner wall, in the annular space between lower center tube and spacing urceolus annular lower piston is arranged; On the outer wall of lower piston cannelure is arranged, lock ring down is installed in cannelure, on the spacing outer tube inner wall annular groove is arranged.When the highly pressurised liquid that enters from following inlet opening promote lower piston to lower slider and down lock ring enter in the annular groove on the spacing outer tube inner wall, following lock ring expands, following lock ring can stop lower piston to continue to lower slider.Be fixed together with following shear pin between spacing urceolus and the lower piston, lower piston at first needs to cut off down shear pin when lower slider.
Be with annular lower rubber cylinder wedging ring on lower center tube, the lower surface of lower piston and spacing urceolus is outside the top of lower rubber cylinder wedging ring on the step; Be with on lower rubber cylinder upper support ring, the lower rubber cylinder on conical ring, the lower rubber cylinder under protective sleeve, lower rubber cylinder, the lower rubber cylinder conical ring and lower rubber cylinder lower support ring under protective sleeve, the lower rubber cylinder on the lower center tube; The structure of lower rubber cylinder upper support ring is identical with the structure of last packing element upper support ring, the structure of conical ring is identical with the structure of last packing element epicone ring on the lower rubber cylinder, on the lower rubber cylinder on the structure of protective sleeve and the last packing element structure of protective sleeve identical, the structure of lower rubber cylinder is identical with the structure of last packing element, under the lower rubber cylinder under the structure of protective sleeve and the last packing element structure of protective sleeve identical, under the lower rubber cylinder under the structure of conical ring and the last packing element structure of conical ring identical, the structure of lower rubber cylinder lower support ring is identical with the structure of last packing element lower support ring; Confinement ring on the lower rubber cylinder is arranged in the cannelure of lower rubber cylinder upper support ring, confinement ring under the lower rubber cylinder is arranged in the cannelure of lower rubber cylinder lower support ring;
Screw thread is connected with lower contact in the lower end of lower center tube, and lower rubber cylinder lower support ring is on the top of lower contact.
In order to improve sealing, on the inner and outer wall of upper piston, sealing ring is arranged; Between last wedging ring inwall circular cylinder and upper center tube outer wall, sealing ring is arranged; Last packing element epicone ring, between conical ring and the upper center tube outer wall sealing ring is arranged under the packing element; Between spacing urceolus and upper center tube outer wall, sealing ring is arranged; On the inner and outer wall of lower piston, sealing ring is arranged; Between lower rubber cylinder wedging ring and lower center tube outer wall, sealing ring is arranged; Between conical ring under conical ring, the lower rubber cylinder on the lower rubber cylinder and lower center tube outer wall, sealing ring is arranged.
The last packing element upper support ring of being made up of 3～8 identical back-up blocks, go up that conical ring, lower rubber cylinder upper support ring and lower rubber cylinder lower support ring are torus under the packing element, a toric end inwall is the circular cone annular; Toric other end outer wall has the step of depression, and a toroidal confinement annular groove is arranged on toric outer wall; Back-up block is to adopt wire cutting method that torus is vertically cut into identical back-up block by this cylinder, line of cut is when toric circular cone ring middle part behind transverse cuts one segment distance, line of cut is longitudinally disconnected with the circular cone ring cutting, be that one section half block circular cone ring that extends to a side is arranged on the fan-shaped circular cone ring of each back-up block, have one section to lack half block circular cone ring at the opposite side of this fan-shaped circular cone ring.
The operating principle of summary bidirectional bearing packer.Consult Fig. 1.The packer central tube adds hydraulic pressure, and with the supreme wedging ring 3 of hydraulic pressure transfer, when the thrust that produces when hydraulic pressure reached certain value, last wedging ring 3 was to lower slider by last pressure transmission hole 6 for liquid, and the last shear pin of connection top connection 1 and last wedging ring 32 is cut off by thrust.When last wedging ring 3 moves downward, last lock ring 4 expansions that are enclosed within on top connection 1 outer wall will be gone up wedging ring 3 lockings.Under the effect of last lock ring 4, last wedging ring 3 can only unidirectional moving downward and can not move round about.Last wedging ring is about to thrust for 3 times and is passed to packing element upper support ring 7; last packing element upper support ring 7 passes to packing element upper support cover 9 with thrust; thrust is passed to protective sleeve 10 on the packing element again; protective sleeve 10 passes to packing element 11 with thrust and compresses packing element and set on the last packing element; thrust passes to protective sleeve 12 under the packing element successively, goes up packing element lower support cover 13, goes up packing element lower support ring 14, and withstands on the upper end of spacing urceolus 16 downwards.Meanwhile, hydraulic pressure warp inlet opening 18 down enters, and pressure is passed to spacing urceolus 16, and spacing urceolus 16 is subjected to the step limits outside the upper center tube 17, and the holding position is motionless relatively, with the mutual balance of downward thrust of last packing element lower support ring 14 generations.Under the effect of thrust, last packing element 11 extruding back radial dilatation are until closely being attached on the borehole wall, simultaneously under thrust, last packing element upper support ring 7 becomes big along the conical surface radial motion diameter of last packing element upper support cover 9, equally, last packing element lower support ring 13 becomes big with identical principle radial motion diameter.In thrust compression in the packing element 11, protective sleeve 10 on the last packing element, go up that protective sleeve 12 stretches under the packing element under effect under the radial expansion force of last packing element 11, be out of shape, finally form the disk shape, the last packing element 11 after compressing is played the effect of supplemental support.Hydraulic pressure is behind following inlet opening 18, and when keeping spacing urceolus 16 positions motionless relatively, pressure is passed to the upper surface of lower piston 19.Consult Fig. 2.Under the downward thrust that hydraulic pressure produces, following shear pin 22 is cut off, and lower piston 19 moves downward, and relies on lock ring 21 and spacing urceolus 16 mutual self-lockings down, and limit the position of spacing urceolus 16 relatively, lower piston 19 can only move downward and can not move round about.Lower piston 19 passes to lower rubber cylinder wedging ring 23 with thrust; and be passed on lower rubber cylinder upper support ring 24, lower rubber cylinder upper support cover 26, the lower rubber cylinder protective sleeve 29, lower rubber cylinder lower support cover 30, lower rubber cylinder lower support ring 32 under protective sleeve 27, lower rubber cylinder 28, the lower rubber cylinder successively, until the upper surface of lower contact 33.Equally under thrust; lower rubber cylinder upper support ring 24, lower rubber cylinder lower support ring 32 radial dilatation are affixed to the borehole wall; lower rubber cylinder 28 is radial dilatation under compression force; on the lower rubber cylinder under protective sleeve 27, the lower rubber cylinder protective sleeve 29 under the effect of packing element radial expansion force; be squeezed into the disk shape, play the effect of supplemental support lower rubber cylinder 28.
When last packing element 11, lower rubber cylinder 28 set by compression finish after, when the last end pressure of the annular space between the packer and the borehole wall was high, last packing element 11 played the effect of piston, and downward thrust is passed to lower rubber cylinder 28; When end pressure is high under the annular space between the packer and the borehole wall, lower rubber cylinder 28 will upwards be passed to thrust packing element 11; Because between last packing element 11 and the lower rubber cylinder 28 is confined space, and two packing elements all can bear bidirectional pressure difference, so behind the packer setting, the seal pressure differential of two packing elements transmits mutually, has improved the pressure reduction ability of bearing of whole packer.
The beneficial effect of utility model: the utility model bidirectional bearing packer, consider the uncertainty of open hole well hole diameter, two packing elements have been adopted, two packing elements are separately positioned on the two ends of packer, when one of them packing element causes sealing effectiveness relatively poor owing to well radius variations, but another packing element maintenance bears high pressure.Particularly be arranged on the back-up block at packing element two ends, can be after being subjected to axial compression dilator to the borehole wall, it is infinitely approaching to be equivalent in the packer setting process rigid body external diameter and the borehole wall, thereby makes the support force of two end faces of packing element be largely increased, thereby has improved the bearing capacity of packing element.When packing element set the consequence pressure difference, two packing element sealing units had dynamically the effect of compression mutually, after the upper end pressurization of last packing element, transferred loads to the lower rubber cylinder upper end, continued the compression lower rubber cylinder; After the pressurization of lower rubber cylinder lower end, transfer loads to the packing element lower end, continue compression and go up packing element, therefore also have the sealing of the bore hole of enhancing, improve the effect of seal pressure differential.In addition, the utility model packing element compressed format has changed in the past way from bottom to top, two packing elements all adopt the compressed format downward from the upper end, promptly the compressing mechanism of two packing elements all is arranged on the upper end of packing element, when having guaranteed that packer is gone into the well, under the effect of the frictional force that is subjected to the borehole wall, wedging ring has the trend that moves upward, can not start the compression packing element in advance, therefore effectively prevent the possibility that sets midway.
In the utility model bidirectional bearing packer, collocation intermeshes after 3～8 back-up blocks of composition packing element support ring are combined, after protruding, stop the space that packing element is outwards outstanding, produce rheology, significantly improved the service behaviour of HTHP lower packet.For easy for installation, there is identical support ring at the two ends of two packing elements of open hole packer.
Description of drawings
Fig. 1 is bidirectional bearing packer the first half structural representation.
Fig. 2 is bidirectional bearing packer the latter half structural representation.
Fig. 3 is the schematic perspective view of a back-up block 34.Promptly form back-up block 34 structural representations of going up packing element upper support ring 7, going up packing element lower support ring 14, lower rubber cylinder upper support ring 24 or lower rubber cylinder lower support ring 32.
Fig. 4 is the view of six support rings in sleeve pipe and when not having radial dilatation.
Fig. 5 is the view six support rings are subjected to thrust and radial dilatation in sleeve pipe after.
Among the figure, shear pin is 2. gone up in 1. top connection; 3. go up wedging ring, 4. go up lock ring, 5. upper piston; 6. go up inlet opening, 7. go up packing element upper support ring, 8. go up confinement ring on the packing element; 9. go up packing element epicone ring, 10. go up protective sleeve on the packing element, packing element on 11.; 12. protective sleeve under the last packing element, conical ring under the packing element on 13., packing element lower support ring on 14.; 15. confinement ring under the last packing element, 16. spacing urceolus, 17. upper center tubes; 18. following inlet opening, 19. lower pistons, 20. lower center tubes; 21. following lock ring, 22. times shear pins, 23. lower rubber cylinder wedging rings; 24. lower rubber cylinder upper support ring, confinement ring on 25. lower rubber cylinders, conical ring on 26. lower rubber cylinders; 27. protective sleeve on the lower rubber cylinder, 28. lower rubber cylinders, protective sleeve under 29. lower rubber cylinders; 30. conical ring under the lower rubber cylinder, confinement ring under 31. lower rubber cylinders, 32. lower rubber cylinder lower support rings; 33. lower contact, 34. back-up blocks.
The specific embodiment
Embodiment 1: the bidirectional bearing packer that is enclosed in casing inner diameter 170mm or bore hole internal diameter 170mm with an energy seat is an example, and the utility model is described in further detail.
Consult Fig. 1.The external diameter 142mm of bidirectional bearing packer, internal diameter 76mm, total length 1200mm.Mainly by top connection 1; last wedging ring 3; upper piston 5; last packing element upper support ring 7; confinement ring 8 on the last packing element; last packing element epicone ring 9; protective sleeve 10 on the last packing element; last packing element 11; protective sleeve 12 under the last packing element; conical ring 13 under the last packing element; last packing element lower support ring 14; confinement ring 15 under the last packing element; spacing urceolus 16; upper center tube 17; lower piston 19; lower center tube 20; lower rubber cylinder wedging ring 23; lower rubber cylinder upper support ring 24; confinement ring 25 on the lower rubber cylinder; conical ring 26 on the lower rubber cylinder; protective sleeve 27 on the lower rubber cylinder; lower rubber cylinder 28; protective sleeve 29 under the lower rubber cylinder; conical ring 30 under the lower rubber cylinder; confinement ring 31 under the lower rubber cylinder; lower rubber cylinder lower support ring 32 and lower contact 33 are formed.
Be with wedging ring 3 on the lower end outer wall of top connection 1, last wedging ring 3 is cylindric, last wedging ring 3 external diameter 142mm.Go up shear pin 2 with four between last wedging ring 3 and the top connection 1 and be fixed together, on the lower end outer wall of top connection 1 cannelure is arranged, lock ring 4 is installed in cannelure, on the inwall of last wedging ring 3 annular groove is arranged.Screw thread is connected with upper center tube 17 in the inwall lower end of top connection 1, upper center tube 17 internal diameter 76mm.Between upper center tube 17 and last wedging ring 3, form annular space, an annular upper piston 5 is arranged in the annular space between upper center tube 17 and last wedging ring 3 and in the bottom of top connection 1; On the inner and outer wall of upper piston 5, sealing ring is arranged.Last wedging ring 3 lower inner wall have inwardly outstanding circular cylinder, and the circular cylinder of last wedging ring 3 inwalls is enclosed within on the outer wall of upper center tube 17; Between last wedging ring 3 inwall circular cylinders and upper center tube 17 outer walls, a sealing ring is arranged.Inlet opening 6 on having on the upper center tube 17, the position of last inlet opening 6 is in the bottom of upper piston 5 and on the inwardly outstanding circular cylinder top of last wedging ring 3.
Be with packing element upper support ring 7 on the outer wall of upper center tube 17, last packing element upper support ring 7 is formed an annular solid by six identical back-up blocks 34; Last packing element upper support ring 7 has cannelure in the lower end of last wedging ring 3 on last packing element upper support ring 7 outer walls, confinement ring 8 on the packing element is arranged in the cannelure of last packing element upper support ring 7 on one.Confinement ring 8 is elastic circular rings that have a place to disconnect on the last packing element, and confinement ring 8 can make back-up block 34 close up to become an annular together on the last packing element; The lower surface of last packing element upper support ring 7 is an internal conical surface; Be with packing element epicone ring 9 on the upper center tube 17, and going up the bottom of packing element epicone ring 9 at last packing element upper support ring 7.The upper end outer wall of last packing element epicone ring 9 is a taper seat, and the lower end taper seat of last packing element upper support ring 7 is relative with the upper end taper seat of last packing element epicone ring 9; Be with protective sleeve 10 on the packing element on the outer wall of upper center tube 17, protective sleeve 10 is in the bottom of last packing element upper support cover 9 on the last packing element; Be with packing element 11 on the outer wall of upper center tube 17, the external diameter 142mm of last packing element 11.The bottom of last packing element 11 protective sleeve 10 on last packing element; The outer wall of upper center tube 17 and be with successively on the bottom of last packing element 11 protective sleeve 12 under the packing element, on conical ring 13 and last packing element lower support ring 14 under the packing element, confinement ring 15 under the packing element in the cannelure of last packing element lower support ring 14, having; Under the last packing element on the structure of protective sleeve 12 and the last packing element structure of protective sleeve 10 identical, installation direction is opposite; The structure of conical ring 13 is identical with the structure of last packing element epicone ring 9 under the last packing element, and installation direction is opposite; The structure of last packing element lower support ring 14 is identical with the structure of last packing element upper support ring 7, and installation direction is opposite.Confinement ring 15 is elastic circular rings that have a place to disconnect under the last packing element.Last packing element epicone ring 9, between conical ring 13 and upper center tube 17 outer walls sealing ring is arranged respectively under the packing element.
Be with a spacing urceolus 16 at the outer wall of upper center tube 17 and in the bottom of last packing element lower support ring 14, spacing urceolus 16 is cylindric, spacing urceolus 16 external diameter 142mm.Spacing urceolus 16 upper inside wall have inwardly outstanding circular cylinder, and the circular cylinder of spacing urceolus 16 inwalls is enclosed within on the outer wall of upper center tube 17; Between spacing urceolus 16 and upper center tube 17 outer walls, two sealing rings are arranged.Two following inlet openings 18 are arranged on upper center tube 17, and the position of following inlet opening 18 is in the bottom of the spacing urceolus 16 inside circular cylinders of giving prominence to.
Be connected with lower center tube 20 at upper center tube 17 lower end screw threads, lower center tube 20 internal diameter 76mm.Form annular space between lower center tube 20 outer walls and spacing urceolus 16 inwalls, an annular lower piston 19 is arranged in the annular space between lower center tube 20 and spacing urceolus 16; Two sealing rings are arranged respectively on the inner and outer wall of lower piston 19.Consult Fig. 2.On the outer wall of lower piston 19 cannelure is arranged, lock ring 21 down is installed in cannelure, on spacing urceolus 16 inwalls annular groove is arranged.Be fixed together with four following shear pins 22 between spacing urceolus 16 and the lower piston 19.
On lower center tube 20, be with annular lower rubber cylinder wedging ring 23, between lower rubber cylinder wedging ring 23 and lower center tube 20 outer walls, a sealing ring arranged.The lower surface of lower piston 19 and spacing urceolus 16 is outside the top of lower rubber cylinder wedging ring 23 on the step; Be with on lower rubber cylinder upper support ring 24, the lower rubber cylinder on conical ring 26, the lower rubber cylinder under protective sleeve 27, lower rubber cylinder 28, the lower rubber cylinder conical ring 30 and lower rubber cylinder lower support ring 32 under protective sleeve 29, the lower rubber cylinder on the lower center tube 20; The structure of lower rubber cylinder upper support ring 24 is identical with the structure of last packing element upper support ring 7, the structure of conical ring 26 is identical with the structure of last packing element epicone ring 9 on the lower rubber cylinder, on the lower rubber cylinder on the structure of protective sleeve 27 and the last packing element structure of protective sleeve 10 identical, the structure of lower rubber cylinder 28 is identical with the structure of last packing element 11, under the lower rubber cylinder under the structure of protective sleeve 29 and the last packing element structure of protective sleeve 12 identical, under the lower rubber cylinder under the structure of conical ring 30 and the last packing element structure of conical ring 13 identical, the structure of lower rubber cylinder lower support ring 32 is identical with the structure of last packing element lower support ring 14; Confinement ring 25 on the lower rubber cylinder is arranged in the cannelure of lower rubber cylinder upper support ring 24, confinement ring 31 under the lower rubber cylinder is arranged in the cannelure of lower rubber cylinder lower support ring 32; Between conical ring 30 under conical ring on the lower rubber cylinder 26, the lower rubber cylinder and lower center tube 20 outer walls, a sealing ring is arranged respectively.
Screw thread is connected with lower contact 33 in the lower end of lower center tube 20, and lower rubber cylinder lower support ring 32 is on the top of lower contact 33.
Consult Fig. 3.Back-up block 34 is to adopt wire cutting method that torus is vertically cut into identical back-up block 34 by this cylinder, line of cut is when toric circular cone ring middle part behind transverse cuts one segment distance, line of cut is longitudinally disconnected with the circular cone ring cutting, be that one section half block circular cone ring that extends to a side is arranged on the fan-shaped circular cone ring of each back-up block 34, have one section to lack half block circular cone ring at the opposite side of this fan-shaped circular cone ring.The last packing element upper support ring of being made up of six identical back-up blocks 34 7, go up conical ring 13 under the packing element, lower rubber cylinder upper support ring 24 and lower rubber cylinder lower support ring 32 and be torus, a toric end inwall is the circular cone annular; Toric other end outer wall has the step of depression, and a toroidal confinement annular groove is arranged on toric outer wall.Consult Fig. 4.Six support rings are circular in sleeve pipe and when not having radial dilatation.Consult Fig. 5.Six support rings are subjected to the sub-circular that becomes expansion after thrust and the radial dilatation in sleeve pipe.
The bidirectional bearing packer can bear upper and lower pressure reduction 70MPa, reduced when using a plurality of packer in the open hole well the well rate of over-all angle change big 〉=risk of 10 ° the easy bit freezing in position.
Claims (3)
1. bidirectional bearing packer is mainly by top connection (1), last wedging ring (3), upper piston (5), last packing element upper support ring (7), confinement ring on the last packing element (8), last packing element epicone ring (9), protective sleeve on the last packing element (10), last packing element (11), protective sleeve under the last packing element (12), conical ring under the last packing element (13), last packing element lower support ring (14), confinement ring under the last packing element (15), spacing urceolus (16), upper center tube (17), lower piston (19), lower center tube (20), lower rubber cylinder wedging ring (23), lower rubber cylinder upper support ring (24), confinement ring on the lower rubber cylinder (25), conical ring on the lower rubber cylinder (26), protective sleeve on the lower rubber cylinder (27), lower rubber cylinder (28), protective sleeve under the lower rubber cylinder (29), conical ring under the lower rubber cylinder (30), confinement ring under the lower rubber cylinder (31), lower rubber cylinder lower support ring (32) and lower contact (33) are formed; It is characterized in that:
Be with wedging ring (3) on the lower end outer wall of top connection (1), last wedging ring (3) is cylindric, using shear pin (2) between last wedging ring (3) and the top connection (1) is fixed together, on the lower end outer wall of top connection (1) cannelure is arranged, lock ring in cannelure, being equipped with (4), on the inwall of last wedging ring (3) annular groove is arranged, screw thread is connected with upper center tube (17) in the inwall lower end of top connection (1), between upper center tube (17) and last wedging ring (3), form annular space, in the annular space between upper center tube (17) and last wedging ring (3) and in the bottom of top connection (1) annular upper piston (5) is arranged; Last wedging ring (3) lower inner wall has inwardly outstanding circular cylinder, and last wedging ring (3) inwall circular cylinder is enclosed within on the outer wall of upper center tube (17); Last inlet opening (6) is arranged on upper center tube (17), and the position of last inlet opening (6) is in the bottom of upper piston (5) and on the inwardly outstanding circular cylinder top of last wedging ring (3);
Be with packing element upper support ring (7) on the outer wall of upper center tube (17), last packing element upper support ring (7) is formed an annular solid by 3～8 identical back-up blocks (34); Last packing element upper support ring (7) is in the lower end of last wedging ring (3), on last packing element upper support ring (7) outer wall, cannelure is arranged, confinement ring on the last packing element (8) is arranged in the cannelure of last packing element upper support ring (7), confinement ring on the last packing element (8) is an elastic circular ring that has a place to disconnect, and confinement ring on the last packing element (8) closes up back-up block (34) to become an annular together; The lower surface of last packing element upper support ring (7) is an internal conical surface; On upper center tube (17), be with packing element epicone ring (9), and go up the bottom of packing element epicone ring (9) at last packing element upper support ring (7); The upper end outer wall of last packing element epicone ring (9) is a taper seat, and the lower end taper seat of last packing element upper support ring (7) is relative with the upper end taper seat of last packing element epicone ring (9); Be with protective sleeve on the packing element (10) on the outer wall of upper center tube (17), protective sleeve on the last packing element (10) is in the bottom of last packing element upper support cover (9); On the outer wall of upper center tube (17), be with packing element (11), the bottom of last packing element (11) protective sleeve (10) on last packing element; At the outer wall of upper center tube (17) and be with protective sleeve (12) under the packing element on the bottom of last packing element (11) successively, go up conical ring (13) and last packing element lower support ring (14) under the packing element, confinement ring under the last packing element (15) is arranged in the cannelure of last packing element lower support ring (14); The structure of protective sleeve (10) is identical on the structure of protective sleeve under the last packing element (12) and the last packing element, and installation direction is opposite; The structure of conical ring under the last packing element (13) is identical with the structure of last packing element epicone ring (9), and installation direction is opposite; The structure of last packing element lower support ring (14) is identical with the structure of last packing element upper support ring (7), and installation direction is opposite;
Be with spacing urceolus (16) at the outer wall of upper center tube (17) and in the bottom of last packing element lower support ring (14), spacing urceolus (16) is cylindric, spacing urceolus (16) upper inside wall has inwardly outstanding circular cylinder, and spacing urceolus (16) inwall circular cylinder is enclosed within on the outer wall of upper center tube (17); Following inlet opening (18) is arranged on upper center tube (17), and the position of following inlet opening (18) is in the bottom of the inside circular cylinder of giving prominence to of spacing urceolus (16);
Screw thread is connected with lower center tube (20) in upper center tube (17) lower end, form annular space between lower center tube (20) outer wall and spacing urceolus (16) inwall, in the annular space between lower center tube (20) and spacing urceolus (16) annular lower piston (19) is arranged; On the outer wall of lower piston (19) cannelure is arranged, lock ring (21) down is installed in cannelure, annular groove is arranged on spacing urceolus (16) inwall; Be fixed together with following shear pin (22) between spacing urceolus (16) and the lower piston (19);
Be with annular lower rubber cylinder wedging ring (23) on lower center tube (20), the lower surface of lower piston (19) and spacing urceolus (16) is outside the top of lower rubber cylinder wedging ring (23) on the step; Be with on lower rubber cylinder upper support ring (24), the lower rubber cylinder on conical ring (26), the lower rubber cylinder under protective sleeve (27), lower rubber cylinder (28), the lower rubber cylinder conical ring (30) and lower rubber cylinder lower support ring (32) under protective sleeve (29), the lower rubber cylinder on the lower center tube (20); The structure of lower rubber cylinder upper support ring (24) is identical with the structure of last packing element upper support ring (7), the structure of conical ring on the lower rubber cylinder (26) is identical with the structure of last packing element epicone ring (9), the structure of protective sleeve (10) is identical on the structure of protective sleeve on the lower rubber cylinder (27) and the last packing element, the structure of lower rubber cylinder (28) is identical with the structure of last packing element (11), the structure of protective sleeve (12) is identical under the structure of protective sleeve under the lower rubber cylinder (29) and the last packing element, the structure of conical ring (13) is identical under the structure of conical ring under the lower rubber cylinder (30) and the last packing element, and the structure of lower rubber cylinder lower support ring (32) is identical with the structure of last packing element lower support ring (14); Confinement ring on the lower rubber cylinder (25) is arranged in the cannelure of lower rubber cylinder upper support ring (24), confinement ring under the lower rubber cylinder (31) is arranged in the cannelure of lower rubber cylinder lower support ring (32);
Lower end screw thread at lower center tube (20) is connected with lower contact (33), and lower rubber cylinder lower support ring (32) is on the top of lower contact (33).
2. bidirectional bearing packer as claimed in claim 1 is characterized in that: on the inner and outer wall of upper piston (5) sealing ring is arranged; Between last wedging ring (3) inwall circular cylinder and upper center tube (17) outer wall, sealing ring is arranged; Between conical ring (13) and upper center tube (17) outer wall sealing ring is being arranged under last packing element epicone ring (9), the last packing element; Between spacing urceolus (16) and upper center tube (17) outer wall, sealing ring is arranged; On the inner and outer wall of lower piston (19), sealing ring is arranged; Between lower rubber cylinder wedging ring (23) and lower center tube (20) outer wall, sealing ring is arranged; Between conical ring (30) under conical ring on the lower rubber cylinder (26), the lower rubber cylinder and lower center tube (20) outer wall, sealing ring is arranged.
3. bidirectional bearing packer as claimed in claim 1 or 2, it is characterized in that: the last packing element upper support ring of being made up of 3～8 identical back-up blocks (34) (7), go up that conical ring (13), lower rubber cylinder upper support ring (24) and lower rubber cylinder lower support ring (32) are torus under the packing element, a toric end inwall is the circular cone annular; Toric other end outer wall has the step of depression, and a toroidal confinement annular groove is arranged on toric outer wall; Back-up block (34) is to adopt wire cutting method that torus is vertically cut into identical back-up block (34) by this cylinder, line of cut is when toric circular cone ring middle part behind transverse cuts one segment distance, line of cut is longitudinally disconnected with the circular cone ring cutting, be that one section half block circular cone ring that extends to a side is arranged on the fan-shaped circular cone ring of each back-up block (34), have one section to lack half block circular cone ring at the opposite side of this fan-shaped circular cone ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205969998U CN201843570U (en) | 2010-11-04 | 2010-11-04 | Bidirectional bearing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205969998U CN201843570U (en) | 2010-11-04 | 2010-11-04 | Bidirectional bearing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201843570U true CN201843570U (en) | 2011-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205969998U Expired - Lifetime CN201843570U (en) | 2010-11-04 | 2010-11-04 | Bidirectional bearing packer |
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| Country | Link |
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| CN (1) | CN201843570U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011560A (en) * | 2010-11-04 | 2011-04-13 | 中国石油天然气股份有限公司 | Bidirectional pressure-bearing packer |
| CN105804688A (en) * | 2016-03-11 | 2016-07-27 | 新疆华隆油田科技股份有限公司 | Compression type bidirectional pressure-bearing non-washable shaft packer |
| CN104373075B (en) * | 2014-11-07 | 2017-04-12 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN111322030A (en) * | 2020-03-26 | 2020-06-23 | 宝鸡市元亨石油设备有限责任公司 | High temperature high pressure is with recovery type packing element prevents abrupt mechanism |
-
2010
- 2010-11-04 CN CN2010205969998U patent/CN201843570U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011560A (en) * | 2010-11-04 | 2011-04-13 | 中国石油天然气股份有限公司 | Bidirectional pressure-bearing packer |
| CN102011560B (en) * | 2010-11-04 | 2013-04-24 | 中国石油天然气股份有限公司 | Bidirectional pressure-bearing packer |
| CN104373075B (en) * | 2014-11-07 | 2017-04-12 | 中国石油天然气股份有限公司 | Fracturing packer |
| CN105804688A (en) * | 2016-03-11 | 2016-07-27 | 新疆华隆油田科技股份有限公司 | Compression type bidirectional pressure-bearing non-washable shaft packer |
| CN105804688B (en) * | 2016-03-11 | 2018-09-28 | 新疆华隆油田科技股份有限公司 | Compression bidirectional bearing can not flushing packer |
| CN111322030A (en) * | 2020-03-26 | 2020-06-23 | 宝鸡市元亨石油设备有限责任公司 | High temperature high pressure is with recovery type packing element prevents abrupt mechanism |
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