CN204024579U - The expanding spacer ring of combined type packing element shoulder protector - Google Patents
The expanding spacer ring of combined type packing element shoulder protector Download PDFInfo
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- CN204024579U CN204024579U CN201420434978.4U CN201420434978U CN204024579U CN 204024579 U CN204024579 U CN 204024579U CN 201420434978 U CN201420434978 U CN 201420434978U CN 204024579 U CN204024579 U CN 204024579U
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- expanding
- ring
- packing element
- support ring
- alignment pin
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Abstract
The utility model relates to oilfield drilling and production technology field, particularly relate to the expanding spacer ring of a kind of combined type packing element shoulder protector, comprise central tube, be socketed in the packing element on described central tube and lay respectively at the identical upper expanding ring group of the structure at described packing element two ends, lower expanding ring group, described lower expanding ring group comprises lower support ring and several lower expanding pieces of coordinating with described lower support ring, described lower expanding piece is socketed on described lower support ring, described lower expanding piece of outside is provided with low groove, extension spring is next time installed in described low groove, the lower end of described lower expanding piece is provided with lower alignment pin threaded bore, lower alignment pin is provided with in described lower alignment pin threaded bore, liquid pass hole is provided with between pressure-bearing cover and pressure-bearing joint, this support ring adopts many cone structures and carries out guide-localization by alignment pin, can ensure that expanding piece moves radially uniformly, and there will not be the expanding piece of phenomenon tilted, can ensure that expanding piece is got back to initial position fast by returning pull-spring.
Description
Technical field
The utility model relates to oilfield drilling and production technology field, particularly relates to the expanding spacer ring of a kind of combined type packing element shoulder protector.
Background technology
The bearing capacity of packer sealing packing element plays vital effect for the success or failure that oil field well is constructed, the particularly oil well of operations involving high pressure and pony packer, as: the oil well needing operations involving high pressure, existing common way selects the larger packer of steel body diameter to reduce the pressure-bearing cross section of packing element in annular space, improves its compressive property.But therefore can bring packer in well by the negative effect that performance reduces, cause certain risk to lower tubular column operation.Having is exactly some special oil wells again, and the packer of minor diameter must be used to be delivered to down-hole and carry out packing operation, packing element is pressure-bearing work in large annular space, reduces bearing capacity because cross section is excessive, very easily causes breakage to cause packer to lose envelope.
Chinese patent discloses a kind of compression type glue barrel sealing device of packer, the patent No. 201120146494.6, its structure forms primarily of central tube, packing element, protection ring, conical ring, copper overcoat and support ring, on the outer wall of central tube, cover has packing element, it is characterized in that: have protection ring respectively at the two ends of packing element, protection ring has the end, has centre bore bottom protection ring, is enclosed within central tube bottom protection ring; There is the conical ring of annular outer face at the bottom of protection ring, and conical ring is enclosed within central tube; The outer face of described conical ring is taper seat; Have support ring in the outer end of conical ring, support ring is enclosed within central tube, and support ring has taper seat, and the taper seat of support ring is relative with the taper seat of conical ring; On the outer wall of support ring, cover has copper overcoat, and copper overcoat is cylindrical shape.During packer setting, conical ring compresses by packing element, moves axially.Compressing support ring generation radial dilatation.The radial dilatation of support ring also drives copper overcoat external diameter to become large, and be close to sleeve pipe or bore hole inside wall, packer completes and sets.Because external diameter becomes large after support ring and the expansion of copper overcoat, be filled with annular clearance, the stream that effectively prevent after packing element compression becomes, and improves the bearing capacity of packing element; Meanwhile, copper overcoat is close to sleeve pipe or bore hole inside wall, forms second sealing, and make packer have packing element and metal double sealing, sealing effectiveness increases.The shortcoming of this sealing device is: in this programme, support ring does not have radial guide means, one end that conical ring can make support ring be in contact with it when mobile outwards tilts, instead of the support ring radial dilatation of picture described in this programme, but first tilt and expand afterwards, the sealing effectiveness of support ring will be affected like this; In addition, conical ring only has a tapering, and support ring also can be caused first to tilt rear expansion.
The copper overcoat being arranged on back-up block outside can produce permanent deformation, produces swabbing, easily bring out gas blowout accident in trip-out process to pit shaft.In addition when playing lower tubular column operation, the copper overcoat of expanding distortion and internal surface of sleeve pipe, box cupling gap produce and to rub and collision causes breakage, and copper overcoat also just loses to restrict once damaged back-up block and expands outwardly along conical ring, there is the hidden danger of lock of tool drilling.
Utility model content
The purpose of this utility model is the deficiency overcoming above-mentioned technology, and provides a kind of combined type packing element shoulder protector expanding spacer ring, ensures that expanding piece evenly can reach radial dilatation during work, reaches the effect of protection packing element carrying high pressure.After removing seal for packer expanding piece can Rapid reset, avoid generation pit shaft being produced to suction and lock of tool drilling,
The utility model for achieving the above object, by the following technical solutions: the expanding spacer ring of a kind of combined type packing element shoulder protector, comprise central tube, be socketed in the packing element on described central tube and lay respectively at the upper expanding ring group at described packing element two ends, lower expanding ring group, it is characterized in that: described lower expanding ring group comprises the lower support ring and several lower expanding pieces of coordinating with described lower support ring with multiple conical surface, the top of described lower support ring coordinates with described packing element, described lower expanding piece is socketed on described lower support ring, described lower expanding piece of outside is provided with low groove, extension spring is next time installed in described low groove, the lower end of described lower expanding piece is provided with lower alignment pin threaded bore, lower alignment pin is provided with in described lower alignment pin threaded bore, described lower alignment pin overlaps through the pressure-bearing be socketed on central tube and is slidably matched with it, described pressure-bearing cover is slidably matched with the pressure-bearing joint being fixed on central tube lower end, liquid pass hole is provided with between pressure-bearing cover and pressure-bearing joint, described expanding ring group comprises the upper support ring and several upper expanding pieces of coordinating with described upper support ring with multiple conical surface, the bottom of described upper support ring coordinates with described packing element, described expanding piece is socketed on described upper support ring, described expanding piece of outside is provided with upper groove, extension spring last time is installed in described upper groove, the upper end of described expanding piece is provided with alignment pin threaded bore, be provided with alignment pin in described upper alignment pin threaded bore, described upper alignment pin is through the landing nipple be socketed on central tube and be slidably matched with it, the middle part of described upper and lower support ring is respectively equipped with anticreep step, and the below of upper and lower support ring is respectively equipped with limited step.
Preferably, described upper and lower expanding piece is equipped with compensating plate respectively, compensating plate and upper and lower expanding ring block phase place are installed.
Preferably, described upper and lower support ring is at least provided with three conical surfaces.
Preferably, the described upper and lower expanding piece of upper position contacted with described central tube is respectively equipped with sealing ring.
Preferably, described pressure-bearing puts the position contacted with described central tube and is provided with sealing ring.
Preferably, pressure-bearing joint overlaps with described pressure-bearing the position contacted and be provided with sealing ring.
The beneficial effects of the utility model are: this device is opposed two ends being arranged on packing element respectively, by the compressing of the mobile axial force produced of packer power part during work, its radial expanding deformation oil and internal surface of sleeve pipe are coincide, compensate annular space between packer steel body and sleeve pipe, packing element is made to obtain the support ring of a complete annular, damaged for stopping the evagination that packing element causes shoulder to produce along the annular space between packer steel body and internal surface of sleeve pipe because of carrying high pressure, reach the object of packing element carrying high pressure; This support ring adopts many cone structures and is undertaken spacing by alignment pin, can ensure expanding piece of uniform moving radially to central tube, and there will not be the expanding piece of phenomenon tilted, can ensure that expanding piece is got back to initial position fast by returning pull-spring.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is working state schematic representation of the present utility model;
Fig. 3 is the sectional view of upper expanding ring group or lower expanding ring group in the utility model;
Fig. 4 is the stereogram of in the utility model expanding piece;
In figure: 1, central tube; 2, packing element; 3, lower support ring; 4, lower expanding piece; 5, low groove; 6, extension spring next time; 7, lower alignment pin; 8, liquid pass hole; 9, upper support ring; 10, upper expanding piece; 11, upper groove; 12, extension spring last time; 13, upper alignment pin; 14, anticreep step; 15, limited step; 16, compensating plate; 17, pressure-bearing cover; 18, landing nipple; 19, upper alignment pin threaded bore; 20, lower alignment pin threaded bore; 21, pressure-bearing joint.
Detailed description of the invention
Detailed description of the invention of the present utility model is described in detail below in conjunction with accompanying drawing and preferred embodiment.As shown in Figure 1, the expanding spacer ring of a kind of combined type packing element shoulder protector, comprise central tube 1, be socketed in the packing element 2 on described central tube and lay respectively at the upper expanding ring group at described packing element two ends, lower expanding ring group, described lower expanding ring group comprises the lower support ring 3 and several lower expanding pieces 4 of coordinating with described lower support ring with multiple conical surface, the top of described lower support ring coordinates with described packing element, described lower expanding piece is socketed on described lower support ring, described lower expanding piece of outside is provided with low groove 5, extension spring next time 6 is installed in described low groove, the lower end of described lower expanding piece is provided with lower alignment pin threaded bore 20, lower alignment pin 7 is provided with in described lower alignment pin threaded bore, described lower alignment pin overlaps 17 through the pressure-bearing be socketed on central tube and is slidably matched with it, described pressure-bearing cover is slidably matched with the pressure-bearing joint 21 being fixed on central tube lower end, liquid pass hole 8 is provided with between pressure-bearing cover and pressure-bearing joint, described expanding ring group comprises the upper support ring 9 and several upper expanding pieces 10 of coordinating with described upper support ring with multiple conical surface, the bottom of described upper support ring coordinates with described packing element, described expanding piece is socketed on described upper support ring, described expanding piece of outside is provided with upper groove 11, extension spring last time 12 is installed in described upper groove, the upper end of described expanding piece is provided with alignment pin threaded bore 19, be provided with alignment pin 13 in described upper alignment pin threaded bore, described upper alignment pin is through the landing nipple 18 be socketed on central tube and be slidably matched with it, the middle part of described upper and lower support ring is respectively equipped with anticreep step 14, and the below of upper and lower support ring is respectively equipped with limited step 15.Described upper and lower expanding piece is equipped with compensating plate 16 respectively, and compensating plate and upper and lower expanding ring block phase place are installed.Described upper and lower support ring is at least provided with three conical surfaces.The described upper and lower expanding piece of upper position contacted with described central tube is respectively equipped with sealing ring.Described pressure-bearing puts the position contacted with described central tube and is provided with sealing ring.Pressure-bearing joint overlaps with described pressure-bearing the position contacted and is provided with sealing ring.
This device is opposed two ends being arranged on packing element respectively, by the compressing of the mobile axial force produced of packer power part during work, its radial expanding deformation oil and internal surface of sleeve pipe are coincide, compensate annular space between packer steel body and sleeve pipe, packing element is made to obtain the support ring of a complete annular, damaged for stopping the evagination that packing element causes shoulder to produce along the annular space between packer steel body and internal surface of sleeve pipe because of carrying high pressure, reach the object of packing element carrying high pressure; This support ring adopts many cone structures and is undertaken spacing by alignment pin, can ensure expanding piece of uniform moving radially to central tube, and there will not be the expanding piece of phenomenon tilted, can ensure that expanding piece is got back to initial position fast by returning pull-spring.
Operating principle:
Lower expanding ring group: the liquid pass hole 8 of pressure on central tube 1 that oil pipe injects enters the inner chamber of pressure-bearing cover 17, due to central tube 1, between pressure-bearing cover 17 and pressure-bearing joint 21 three, form airtight chamber, the pressure that oil pipe injects promotes pressure-bearing and overlaps 17 up, up along many conical surfaces support ring 7 under the promotion that lower expanding ring group is overlapped in pressure-bearing.In the up process of expanding ring group, each lower expanding piece drives compensating plate together radially to expand under the guiding of lower alignment pin 7 and pilot hole, the up dead point formed after utilizing the limited step 14 on the lower support ring 3 of many conical surfaces to overlap with compensating plate is to limit expansion stroke, the maximum extension amount of expanding ring group is controlled in sleeve pipe, within internal diameter, be similar to the position coincide, object is to prevent from, because expanding ring group expansion ratio and internal surface of sleeve pipe produce up resistance, affecting the compression of packing element 2.Many conical surfaces support ring centrally up compression packing element 2 of pipe 1 is promoted after limited step 15 on the lower support ring 3 of many conical surfaces overlaps with the compensating plate on lower expanding piece 4.
Upper expanding ring group: try hard to recommend support ring 9 on dynamic many conical surfaces by packing element 2 up and strut upper expanding ring group, the rigidity shoulder protector spacer ring of two ring-types is form respectively like this at two end faces of packing element 2, effectively control because packing element carries the phenomenon that breakage that upper and lower pressure reduction causes shoulder evagination to produce causes losing envelope, significantly improve sealing and the load performance of packing element.
Deblocking: when being applied to after support force that pressure-bearing puts eliminates, utilize packing element screen resilience to promote lower expanding ring group, pressure-bearing cover 17 is together descending, utilize lower returning pull-spring 6, upper returning pull-spring 12 by the upper and lower expanding ring block reset of expansion, and the upper and lower support ring of lower many conical surfaces is limited on the limited step 15 on central tube 1, provide support for lower expanding ring group resets completely.After packing element is applied to the support force disappearance of upper expanding ring group, reset is tightened by upper and lower expanding piece by returning pull-spring, the anticreep step be arranged in the middle part of the anticreep step of upper and lower expanding ring block inner chamber and many conical surfaces support ring is collided, for stoping the upper and lower support ring because of many conical surfaces excessively descending, expanding ring group is caused to produce quadratic extension.For packer provides support by tripping out smoothly in well.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (6)
1. the expanding spacer ring of combined type packing element shoulder protector, comprise central tube, be socketed in the packing element on described central tube and lay respectively at the upper expanding ring group at described packing element two ends, lower expanding ring group, it is characterized in that: described lower expanding ring group comprises the lower support ring and several lower expanding pieces of coordinating with described lower support ring with multiple conical surface, the top of described lower support ring coordinates with described packing element, described lower expanding piece is socketed on described lower support ring, described lower expanding piece of outside is provided with low groove, extension spring is next time installed in described low groove, the lower end of described lower expanding piece is provided with lower alignment pin threaded bore, lower alignment pin is provided with in described lower alignment pin threaded bore, described lower alignment pin overlaps through the pressure-bearing be socketed on central tube and is slidably matched with it, described pressure-bearing cover is slidably matched with the pressure-bearing joint being fixed on central tube lower end, liquid pass hole is provided with between pressure-bearing cover and pressure-bearing joint, described expanding ring group comprises the upper support ring and several upper expanding pieces of coordinating with described upper support ring with multiple conical surface, the bottom of described upper support ring coordinates with described packing element, described expanding piece is socketed on described upper support ring, described expanding piece of outside is provided with upper groove, extension spring last time is installed in described upper groove, the upper end of described expanding piece is provided with alignment pin threaded bore, be provided with alignment pin in described upper alignment pin threaded bore, described upper alignment pin is through the landing nipple be socketed on central tube and be slidably matched with it, the middle part of described upper and lower support ring is respectively equipped with anticreep step, and the below of upper and lower support ring is respectively equipped with limited step.
2. the expanding spacer ring of combined type packing element shoulder protector according to claim 1, is characterized in that: described upper and lower expanding piece is equipped with compensating plate respectively, and compensating plate and upper and lower expanding ring block phase place are installed.
3. the expanding spacer ring of combined type packing element shoulder protector according to claim 2, is characterized in that: described upper and lower support ring is at least provided with three conical surfaces.
4. the expanding spacer ring of combined type packing element shoulder protector according to claim 3, is characterized in that: the described upper and lower expanding piece of upper position contacted with described central tube is respectively equipped with sealing ring.
5. the expanding spacer ring of combined type packing element shoulder protector according to claim 3, is characterized in that: described pressure-bearing puts the position contacted with described central tube and is provided with sealing ring.
6. the expanding spacer ring of combined type packing element shoulder protector according to claim 3, is characterized in that: pressure-bearing joint overlaps with described pressure-bearing the position contacted and is provided with sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434978.4U CN204024579U (en) | 2014-07-31 | 2014-07-31 | The expanding spacer ring of combined type packing element shoulder protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420434978.4U CN204024579U (en) | 2014-07-31 | 2014-07-31 | The expanding spacer ring of combined type packing element shoulder protector |
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| Publication Number | Publication Date |
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| CN204024579U true CN204024579U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420434978.4U Active CN204024579U (en) | 2014-07-31 | 2014-07-31 | The expanding spacer ring of combined type packing element shoulder protector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751010A (en) * | 2017-11-06 | 2019-05-14 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | packer |
| CN110145278A (en) * | 2019-04-23 | 2019-08-20 | 中石化石油工程技术服务有限公司 | Bridge plug with packing element component |
| CN110145270A (en) * | 2019-04-23 | 2019-08-20 | 中石化石油工程技术服务有限公司 | Slip assemblies and bridge plug |
| CN110388191A (en) * | 2019-04-04 | 2019-10-29 | 上海优强石油科技有限公司 | The packing element support device of big expanding open hole well packer |
-
2014
- 2014-07-31 CN CN201420434978.4U patent/CN204024579U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109751010A (en) * | 2017-11-06 | 2019-05-14 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | packer |
| CN110388191A (en) * | 2019-04-04 | 2019-10-29 | 上海优强石油科技有限公司 | The packing element support device of big expanding open hole well packer |
| CN110145278A (en) * | 2019-04-23 | 2019-08-20 | 中石化石油工程技术服务有限公司 | Bridge plug with packing element component |
| CN110145270A (en) * | 2019-04-23 | 2019-08-20 | 中石化石油工程技术服务有限公司 | Slip assemblies and bridge plug |
| CN110145278B (en) * | 2019-04-23 | 2021-05-14 | 中石化石油工程技术服务有限公司 | Bridge plug with rubber cylinder assembly |
| CN110145270B (en) * | 2019-04-23 | 2021-07-20 | 中石化石油工程技术服务有限公司 | Bridge plug |
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