CN202788736U - Two-way pressure-bearing packer - Google Patents
Two-way pressure-bearing packer Download PDFInfo
- Publication number
- CN202788736U CN202788736U CN201220448186.3U CN201220448186U CN202788736U CN 202788736 U CN202788736 U CN 202788736U CN 201220448186 U CN201220448186 U CN 201220448186U CN 202788736 U CN202788736 U CN 202788736U
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- central tube
- seat
- piston
- fluid cylinder
- packing element
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Abstract
The utility model discloses a two-way pressure-bearing packer in the field of oil production tools. The two-way pressure-bearing packer comprises an upper joint, a lower joint and a central tube, wherein the central tube is sleeved with at least two rubber cylinders and internally provided with lining tubes; the upper ends of the lining tubes are connected with the inner side of the upper joint; the outer side of the lower end of the upper joint is in threaded connection with a valve casing; the lower end of the valve casing is in threaded connection with an inner valve seat; the rubber cylinders at the upper end are mounted on the lower end face of the inner valve seat in a matching manner; a reversing slide piston is arranged in the inner valve seat; the central tube is provided with an upper hydraulic cylinder and a lower hydraulic cylinder in sequence; the lower end of a piston of the lower hydraulic cylinder is connected with a support sleeve; a clamping spring seat is arranged outside the support sleeve; the lower end of the lower hydraulic cylinder is connected with a clamping spring sleeve; a clamping spring is arranged in the clamping spring sleeve; the lower end of the clamping spring seat is connected with a seat prevention sleeve; the clamping spring seat is sleeved with a locating ring; a seat prevention pin is arranged between the seat prevention sleeve and the locating ring; and a deblocking pin is arranged between the clamping spring seat and the support sleeve. The packer has functions of complete self-balancing and two-way pressure bearing, and increases success rates of measures such as separate layer oil production and separate layer water injection.
Description
Technical field
The utility model relates to a kind of oil extraction in oil field instrument, particularly a kind of packer.
Background technology
In the process of oil field development, packer is divided into some sections with the multiple zone water layer, plays the effect of isolated payzone.After water-yielding stratum was by shutoff, other oil reservoir can normally be produced.Different series of strata can produce very large pressure differential on packing element, too high pressure reduction is very disadvantageous to the normal operation of packer.Conventional hydraulic compression type packer does not have slips to support, and is next setting by pressurization in tubing string, keeps in oil pipe in the situation of pressure, and the frictional force of packing element group and sleeve pipe can overcome interlayer to the thrust of packing element effect.And in the situation of pressure release in the oil pipe, the thrust that acts on the packer fluid cylinder disappears, and when pressure on the packer was high, packer only depended on the deblocking pin to bear the thrust that acts on the packing element.It is low that packer bears pressure energy power, generally is no more than 3MPa, and when surpassing this threshold value, the shearing that acts on the deblocking pin will be greater than the shear strength of pin, packer from opening in advance, and tubing string lost efficacy.
Present modified packer has increased dummy piston mechanism, in order to eliminate the thrust on the part packing element, has improved the upper pressure limit that packer bears.But there are the following problems: one, and complicated on the structure, the amount of parts increase causes the packer action dumb, poor reliability.Two, the counteracting power of dummy piston is limited, can only accomplish partial offset, and when upper pressure was high, the packer generation in advance situation of deblocking happened occasionally.Three, when pressing down when high, it is unreliable that deblocking becomes.
In the prior art, a kind of pressure expansion sleeve exterior packer is arranged, its patent No.: the ZL200820037902.2 applying date: 2008-06-05, publication number: CN201209420Y, open day 2009-03-18, it comprises central tube, the central tube upper end is provided with box cupling, the central tube lower end is connected with lower contact, central tube is set with some packing elements outward, between the packing element through in spacer ring separate, topmost the packing element upside and bottom the packing element downside be respectively equipped with support member, described support member and middle spacer ring movable set are positioned at the support member conflict of downside on the upper surface of lower contact outside central tube, the support member top that is positioned at upside is provided with engage sleeves and is contained in the outer hydraulic cylinder of central tube, the hydraulic cavities that forms between central tube and the hydraulic cylinder is connected the central tube inner chamber through the hydraulic pressure hole, the pressure cap that has been threaded on the hydraulic cylinder is fixed with the lock ring that is nested with outside central tube on the inwall between pressure cap and the hydraulic cylinder, also be provided with shear pin between pressure cap and the central tube, pressure cap upper surface upside is provided with and is threaded in the outer also cap of central tube; On the lock ring inner periphery and be positioned at corresponding being provided with to the pawl of coupling on the central tube excircle of lock ring downside.During work, it is as the ingredient of bunch tube, box cupling all is connected with sleeve pipe with lower contact, is lowered into the precalculated position, down-hole by design, injects drilling fluid, drilling fluid enters the hydraulic cavities from the hydraulic pressure hole, when pressure is elevated to predetermined pressure, hydraulic cylinder is cut off shear pin, and hydraulic cylinder is descending, support member is pushed packing element, makes it produce distortion and shutoff annular clearance; It is descending that pressure cap drives lock ring simultaneously, pawl corresponding on the central tube excircle that reaches the lock ring downside on the lock ring inner periphery is combined, when the central tube internal pressure reduced to zero, the pawl that mutually combines can stop the hydraulic cylinder rollback, kept packing element to be in good compressive state and joint ring empty gap.The weak point of this device is: its bidirectional bearing ability, packer set and deblocking are reliable not.
The utility model content
The purpose of this utility model provides a kind of Bidirectional bearing packer, makes it possess two-way withstand voltage packing function; Bear when pressing at packer, can keep the thrust of fluid cylinder on the packer, the effect thrust on the complete equipilibrium packing rubber sleeve has been improved the stressed of deblocking shear pin, has improved the reliability of tubing string sealing.Packer set is flexible simultaneously, deblocking is reliable.
The purpose of this utility model is achieved in that a kind of Bidirectional bearing packer, comprise top connection, lower contact and central tube, the central tube lower end is threaded with lower contact, central tube is set with at least twice packing element outward, isolated through spacer ring between the adjacent packing element, be provided with a gap internal lining pipe in the described central tube, internal lining pipe lower end and central tube are tightly connected, the internal lining pipe upper end is connected with the top connection inner seal, top connection lower end outside screw is connected with valve shell, valve shell lower end screw thread is connected with the valve inner seat, valve inner seat lower surface cooperates installation with the packing element that is positioned at the upper end, valve inner seat lower end is inboard to be threaded with described central tube, the section of the extending axially engage sleeves that arranges on the valve inner seat is contained in the internal lining pipe surface, the described section of the extending axially outside is set with the commutation sliding plunger, and the top connection inner chamber is connected in the space of commutation sliding plunger top, and the outer space of valve shell is connected in the space of commutation sliding plunger below; The packing element downside that central tube is positioned at the lower end outward is equipped with fluid cylinder, is equipped with upper piston in the upper fluid cylinder, and the inboard of upper piston and central tube sealing are installed, and central tube is provided with the descending upper limit step of restriction upper piston; Upper fluid cylinder lower end is connected with lower fluid cylinder, and lower fluid cylinder upper end inner seal is nested with in the central tube outside, is provided with lower piston in the lower fluid cylinder, and the inboard of lower piston and central tube sealing are installed, and central tube is provided with the up lower limit step of restriction lower piston; The lower piston lower end is connected with support set, and support set is outside equipped with the in addition clip spring seat of pawl, and lower fluid cylinder lower end is connected with the jump ring cover, be provided with the jump ring corresponding with pawl in the jump ring cover, described jump ring is sleeved on the clip spring seat, and is positioned at described pawl below, and the clip spring seat lower end is connected with anti-cover for seat; Clip spring seat is set with locating ring outward, is connected through anti-seat pin nail between anti-cover for seat and the locating ring, links to each other through the deblocking pin between clip spring seat and the support set; The space of described upper piston and lower piston top respectively with central tube and internal lining pipe between the gap communicate.
In this device, commutation slide-valve and the upper runner that arranges thereof, formed " voting " system, no matter be to press in the oil pipe to press height on height or the packer, the side that always pressure is high has taken over packer liquid cylinder piston pressure, so that the frictional force of packing element group and sleeve pipe can overcome the thrust that acts on packing element, reached full bi-directional pressure-bearing function.This apparatus structure advantages of simple, packer is flexible, and deblocking is reliable, and for improving the tubing string sealing reliability, the success rate that improves the oil-water well measure is significant.
For ease of making, simultaneously packing is reliable, and described packing element can arrange twice.
For making things convenient for liquid to flow to out commutation sliding plunger superjacent air space, connect commutation sliding plunger superjacent air space at the inboard outwards downward-sloping liquid flow hole that is provided with of top connection.It is easy to process.
For the protection packing element is avoided damage, between the packing element of described valve inner seat lower end and upper end, be respectively equipped with between the packing element of lower end and the upper fluid cylinder and protect bowl.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the partial enlarged drawing of A among Fig. 1.
Fig. 3 is the partial enlarged drawing of B among Fig. 1.
Wherein, 1 top connection, 2 valve shells, 3 internal lining pipes, 4 commutation sliding plungers, 5 valve inner seats, 6 central tubes, 7 protect fluid cylinder on bowl, 8 packing elements, 9,10 upper pistons, 11 times fluid cylinders, 12 lower pistons, 13 support sets, 14 clip spring seats, 15 jump ring covers, 16 jump rings, 17 deblocking pins, 18 anti-cover for seat, 19 anti-seat pin nails, 20 locating rings, 21 lower contacts, 22 spacer rings, a liquid flow hole, b upper limit step, c lower limit step.
The specific embodiment
As shown in the figure, be a kind of Bidirectional bearing packer, comprise top connection 1, lower contact 21 and central tube 6, central tube 6 lower ends are threaded with lower contact 21, central tube 6 outer suit twice packing elements 8, isolated through spacer ring 22 between the twice packing element 8, be provided with a gap internal lining pipe 3 in the central tube 6, internal lining pipe 3 lower ends and central tube 6 are tightly connected, internal lining pipe 3 upper ends are connected with top connection 1 inner seal, top connection 1 lower end outside screw is connected with valve shell 2, valve shell 2 lower end screw threads are connected with valve inner seat 5, valve inner seat 5 lower surfaces cooperate installation with the packing element 8 that is positioned at the upper end, valve inner seat 5 lower ends are inboard to be threaded with described central tube 6, and the section of the extending axially engage sleeves that arranges on the valve inner seat 5 is contained in internal lining pipe 3 surfaces, and the described section of the extending axially outside is set with commutation sliding plunger 4, outside downward-sloping commutation sliding plunger 4 superjacent air spaces in the liquid flow hole a connection that are provided with in top connection 1 inner chamber, the space outside the valve shell 2 is connected in the space of commutation sliding plunger 4 belows; Outer packing element 8 downsides that are positioned at the lower end of central tube 6 are equipped with fluid cylinder 9, are equipped with upper piston 10 in the upper fluid cylinder 9, and install with central tube 6 sealings the inboard of upper piston 10, and central tube 6 is provided with and limits the descending upper limit step b of upper piston 10; Upper fluid cylinder 9 lower ends are connected with lower fluid cylinder 11, lower fluid cylinder 11 upper end inner seals are nested with in central tube 6 outsides, be provided with lower piston 12 in the lower fluid cylinder 11,6 sealings of the inboard of lower piston 12 and central tube are installed, and central tube 6 is provided with the up lower limit step c of restriction lower piston 12; Lower piston 12 lower ends are connected with support set 13, support set 13 is outside equipped with the in addition clip spring seat 14 of pawl, lower fluid cylinder 11 lower ends are connected with jump ring cover 15, be provided with the jump ring corresponding with pawl 16 in the jump ring cover 15, described jump ring cover 15 is contained on the clip spring seat 14, and being positioned at described pawl below, clip spring seat 14 lower ends are connected with anti-cover for seat 18; Be connected through anti-seat pin nail 19 between the outer locating rings 20 that are set with of clip spring seat 14, anti-cover for seat 18 and locating ring 20, continuous through deblocking pin 1717 between clip spring seat 14 and the support set 13; The space of described upper piston 10 and lower piston 12 tops respectively with central tube 6 and internal lining pipe 3 between the gap communicate; Between the packing element 8 of valve inner seat 5 lower ends and upper end, be respectively equipped with between the packing element 8 of lower end and the upper fluid cylinder 9 and protect bowl 7.
This device is connected on the flow string and is lowered into the down-hole, and its operating principle is as follows:
Setting: in the situation about suppressing in oil pipe, pressure-acting makes its down sliding on commutation sliding plunger 4, and pressure acts on fluid cylinder 9, the lower fluid cylinder 11 by the annular clearance transmission between internal lining pipe 3 and the central tube 6.When pressure reached predetermined value, anti-seat pin nail 19 was cut off, and packing element 8 is compressed radially to swell, until the complete closed oil sets annular space, clip spring seat 14 and jump ring 16 lockings.Because the oil pipe internal pressure arranged, packer is deblocking voluntarily not.
Balance: when pressing cancellation in the oil pipe, the pressure-driven on packer upper strata commutation sliding plunger 4 makes its upward sliding, and high pressure is delivered in the annular clearance between internal lining pipe 3 and the central tube 6 again, continues to keep to act on fluid cylinder 9, lower fluid cylinder 11.Packing element 8 is being kept compressive force all the time, and packer can be because of not losing pressure in the oil pipe, and deblocking voluntarily.
Deblocking: on carry flow string, deblocking pin 17 is cut off, packing element 8 elastic recoverys break away from the borehole wall, removing seal for packer.
Because this Bidirectional bearing packer has been realized complete self-balancing, bidirectional bearing function.Simple on the structure, the packer flexibility and reliability, deblocking is reliable.In the use, keep the use habit of traditional hydraulic compression type packer, at constantly perfect along with supporting technology in future, can replace the packer of existing use comprehensively.
The utility model is not limited to above-described embodiment; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.
Claims (4)
1. Bidirectional bearing packer, comprise top connection, lower contact and central tube, the central tube lower end is threaded with lower contact, central tube is set with at least twice packing element outward, isolated through spacer ring between the adjacent packing element, it is characterized in that: be provided with a gap internal lining pipe in the described central tube, internal lining pipe lower end and central tube are tightly connected, the internal lining pipe upper end is connected with the top connection inner seal, top connection lower end outside screw is connected with valve shell, valve shell lower end screw thread is connected with the valve inner seat, valve inner seat lower surface cooperates installation with the packing element that is positioned at the upper end, valve inner seat lower end is inboard to be threaded with described central tube, the section of the extending axially engage sleeves that arranges on the valve inner seat is contained in the internal lining pipe surface, the described section of the extending axially outside is set with the commutation sliding plunger, and the top connection inner chamber is connected in the space of commutation sliding plunger top, and the outer space of valve shell is connected in the space of commutation sliding plunger below; The packing element downside that central tube is positioned at the lower end outward is equipped with fluid cylinder, is equipped with upper piston in the upper fluid cylinder, and the inboard of upper piston and central tube sealing are installed, and central tube is provided with the descending upper limit step of restriction upper piston; Upper fluid cylinder lower end is connected with lower fluid cylinder, and lower fluid cylinder upper end inner seal is nested with in the central tube outside, is provided with lower piston in the lower fluid cylinder, and the inboard of lower piston and central tube sealing are installed, and central tube is provided with the up lower limit step of restriction lower piston; The lower piston lower end is connected with support set, and support set is outside equipped with the in addition clip spring seat of pawl, and lower fluid cylinder lower end is connected with the jump ring cover, be provided with the jump ring corresponding with pawl in the jump ring cover, described jump ring is sleeved on the clip spring seat, and is positioned at described pawl below, and the clip spring seat lower end is connected with anti-cover for seat; Clip spring seat is set with locating ring outward, is connected through anti-seat pin nail between anti-cover for seat and the locating ring, links to each other through the deblocking pin between clip spring seat and the support set; The space of described upper piston and lower piston top respectively with central tube and internal lining pipe between the gap communicate.
2. Bidirectional bearing packer according to claim 1, it is characterized in that: described packing element is provided with twice.
3. Bidirectional bearing packer according to claim 1 and 2 is characterized in that: the inboard outwards downward-sloping upper commutation of the liquid flow hole connection sliding plunger superjacent air space that is provided with of top connection.
4. Bidirectional bearing packer according to claim 1 and 2 is characterized in that: between the packing element of described valve inner seat lower end and upper end, be respectively equipped with between the packing element of lower end and the upper fluid cylinder and protect bowl.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220448186.3U CN202788736U (en) | 2012-09-05 | 2012-09-05 | Two-way pressure-bearing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220448186.3U CN202788736U (en) | 2012-09-05 | 2012-09-05 | Two-way pressure-bearing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202788736U true CN202788736U (en) | 2013-03-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220448186.3U Expired - Lifetime CN202788736U (en) | 2012-09-05 | 2012-09-05 | Two-way pressure-bearing packer |
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| Country | Link |
|---|---|
| CN (1) | CN202788736U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883737A (en) * | 2014-03-28 | 2014-06-25 | 上海德干重型机器有限公司 | Sealing device |
| 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 |
| CN106703739A (en) * | 2015-08-07 | 2017-05-24 | 中国石油化工股份有限公司 | Balanced type double-piston hydraulic-control compression four-rubber-cylinder packer |
-
2012
- 2012-09-05 CN CN201220448186.3U patent/CN202788736U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103883737A (en) * | 2014-03-28 | 2014-06-25 | 上海德干重型机器有限公司 | Sealing device |
| CN103883737B (en) * | 2014-03-28 | 2016-04-13 | 上海德干重型机器有限公司 | Seal arrangement |
| CN106703739A (en) * | 2015-08-07 | 2017-05-24 | 中国石油化工股份有限公司 | Balanced type double-piston hydraulic-control compression four-rubber-cylinder 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |