巴西专利BR112013003448B1 High expansion retractable plug for underground use

专利PDF首页>>巴西专利

专利附录

专利说明

权利要求

类似技术

同族专利

引用文献

法律状态

优先权

专利摘要:
retractable petal clamp support for underground sealing. the present invention relates to a high expansion plug that has multiple sealing elements and an extrusion barrier system that uses overlapping petals in a stack of rings. when adjusting the plug, the petals are moved in an elastic way towards a surrounding tubular wall in an elastic deformation between a compartment surrounding the mandrel and a tapered ring in the mandrel. the act of interleaving controls the amount of deformation and allows a potential energy force to be stored in the petals, which allows them to return towards their initial position, the buffer assembly is released and the seals are allowed to relax and extend axial as they shrink radially. the plug can then be removed without grinding. expansions in the order of 25% of the initial sealing dimension are contemplated.
公开号:BR112013003448B1
申请号:R112013003448-3
申请日:2011-07-26
公开日:2020-03-03
发明作者:David S. Bishop；Dennis E. Kroll
申请人:Baker Hughes Incorporated；
IPC主号:

专利说明:

Invention Patent Descriptive Report for HIGH EXPANSION RETRACTABLE CAP FOR UNDERGROUND USE. Field of the Invention [001] The present invention relates to high expansion compressors and, more particularly, those that can be recovered while using overlapping petals to form the support rings. Background of the Invention [002] High-expansion compressors are used in through-pipe applications where the compressor or plug is then fitted into a housing below the pipe through which it is released. Some designs provided cup-shaped support ring stacks that have staggered slits, such as between layers as an extrusion barrier in expansion ranges of up to 25%. USP 6,827,150 is an illustration of such a design. Others are USP 7,128,145; U.S. publication 2004/0149429 and 2005/0115720. Other high-expansion compressor designs are from U.S. Re 32,831; 6,311,778; 6,318,461 and 6,164,375.
[003] High expansion designs have focused on the need to avoid extrusion as a result of the combination of high expansion and differential pressure. The stack of support rings was deformed against the surrounding tubular so that the high expansion plug of the previous design was removable by grinding it. What is needed in high expansion applications is a retractable design that acts as needed to prevent extrusion of the element under pressure differentials typically seen by such plugs.
[004] The present invention addresses this issue by using an overlapping petal design for the support rings, but discarding the rings in a way where the set has a low profile to extend and that guides the flexion of the petals towards to the surrounding tubular when in the defined position. Support is offered to
Petition 870190101799, of 10/10/2019, p. 5/17
2/5 petals through a compartment on one side and a tapered guide ring on the other side. As a result, the petals deform in an elastic manner to act as a support for the sealing elements and when the plug is removed and the sealing elements are able to free themselves from the surrounding tubular with the use of the potential energy stored from the elastic deformation that occurred when the plug was set. The mirror image orientations of the sealing elements and the support rings address the differential pressures in opposite directions. Those skilled in the art will better understand the invention from the description of the preferred modality and from the associated drawings, while recognizing that the full scope of the invention is determined by the appended claims below.
Summary of the Invention [005] A high expansion plug has multiple sealing elements and an extrusion barrier system that uses overlapping petals in a stack of rings. When adjusting the plug, the petals are moved in an elastic way towards a surrounding tubular wall in an elastic deformation between a compartment surrounding the mandrel and a tapered ring in the mandrel. The act of interleaving controls the amount of deformation and allows a potential energy force to be stored in the petals, which allows them to return towards their initial position. The buffer assembly is released and the seals are allowed to relax and extend axial as they shrink radially. The plug can then be removed without grinding. Expansions in the order of more than 25% of the initial sealing dimension are contemplated.
Brief Description of the Drawings [006] Figures 1a - 1b show the plug extended in position;
[007] Figures 2a - 2b show the plug in the defined position;
Petition 870190101799, of 10/10/2019, p. 6/17
3/5 [008] Figure 3 is an enlarged view showing the petal assembly that extends to its support compartment. Detailed Description of the Preferred Mode [009] Figure 1a is the upper end of buffer 10, while Figure 1b is the lower end of mirror image of buffer 10. A mandrel 12 extends in both parts of Figure 1 and supports the sealing element 14.
[0010] A support ring 20 which is preferably made of PTFE or
Amadil® is adjacent to an inclined ring 22. Both rings are mounted on mandrel 12 and are slidably mounted with respect to mandrel 12. Ring 21 rests on mandrel 12 and is preferably produced from PEEK. It sits there to resist extrusion of element 14 along mandrel 12 as shown in Figure 2. Together, they feature a barrier for rubber element 14 to prevent extrusion under and between petal rings 30 and 32. As seen in Figure 3, the petal rings 30 and 32 are formed from the elongated flat steel members that, in each ring, overlap an adjacent petal. As between the rings the spacing is misaligned circumferentially, such that the petals of a ring are not in alignment with the petals of an adjacent ring. Although two overlapping rings are shown, other numbers of rings can be used without departing from the invention. The elongated petal rings are attached at one end to a base 34 which is arranged within an annular space 28 defined between the sleeve 26 and the mandrel 12. The sleeve 26 has a taper 27 that is in selective contact with the stacked rings 30 and 32 in the position defined in Figure 2 on the opposite side from the inclined surface 24. The sleeve 26 has an opening 36 through which the mandrel 12 extends so that both the sleeve 26 and the base 34, and the elongated petal rings 30 and 32 which are supported with base 34
Petition 870190101799, of 10/10/2019, p. 7/17
4/5 can be moved when the plug 10 is defined, maintaining the mandrel 12 and using an adjustment sleeve which is shown schematically as the arrow 38 in Figure 1a. In essence, Figure 1a is the mirror image of Figure 1b as between the seal 14 and the associated sleeve 40 With this arrangement, the seal 14 can be retractably defined with an expansion rate of more than 25%.
[0011] In the defined position of Figure 2, the petal rings 30 and 32 are against the casing or tubular 42 with the end 44 of the sleeve 40 against the stacked rings 30 and 32 on one side, and the seal 14 on the other side. The same is true in the opposite hand where the ring stacks 30 and 32 are against the sleeve 26 on one side and the seal 14 on the other side. What happened as a result of the relative movement created by the clamping tool, shown schematically as 38, which pushes all parts against a displacement stop represented schematically by the arrow 18, is that the stacked rings that extend beyond the respective sleeves 26 or 40 have been elastically deformed so as to be in contact with the surrounding tubular 42 to function as a support for the respective adjacent seal, while at the same time, rings 30 and 32 have been provided with sufficient support from on opposite sides to hold them against the tubular 42 in the adjusted position, while still allowing the rings to retract if the plug 10 is out of adjustment. The reason for this is that the part of the overlapping rings 30 and 32 extending from the respective sleeves is simply flexed in an elastic way, so that backward movement is still possible. The support provided from the ends opposite the petal rings gives them the strength to serve as extrusion barriers in the defined position, while still keeping them recoverable. [0012] Figure 3 shows two adjacent overlapping petals and 48 from a ring and another petal 50 from a ring
Petition 870190101799, of 10/10/2019, p. 8/17
5/5 adjacent which is displaced from both petals 46 and 48 to illustrate the juxtaposition of the adjacent petal rings. The petals themselves are metallic, preferably elongated structures that can have parallel sides or can expand towards the end that extends from the adjacent sleeve. The sleeves can be secured to extend with the shear pins or breakable retainers. Although mirror image configurations are preferred, other options are foreseen, such as using only a single seal with the type of petal support to resist differentials in a single direction, instead of the opposite directions as described above. Alternatively, there may be more than a single seal with the associated support, as described above, that resists the pressure differential in a given direction.
[0013] The above description is illustrative of the preferred modality and several modifications can be made by those skilled in the art without departing from the invention, the scope of which must be determined from the literal and equivalent scope of the following claims.

权利要求:
Claims (16)
[1]
1. High expansion retractable plug for underground use, characterized by the fact that it comprises:
a mandrel (12) supporting at least one sealing element (14) adjusted by compression to selectively seal against and release from a surrounding wall in an underground location;
at least one extensible support ring (20) mounted on a support (26), said support ring (20) disposed between said sealing element (14) and said support (26), wherein upon compression of said sealing element (14), said support ring flexes to contact said wall and said sealing element (14);
said support (26) comprises an inclined surface (24) on one side of said support ring (20) on which said support ring (20) slides and an inclined member on an opposite side of said support ring (20 ) of the inclined surface (24) and initially axially spaced from said support ring (20), in which after axial compression of said sealing element (14) said inclined member initially moves axially in relation to said support ring (20) sliding so that said sliding ring (20) slides on said sloped surface (24) so that said sloping member then contacts said sling ring (20) to retain said sliding ring support (20) in contact with said wall and said sealing element (14).
[2]
2. Buffer, according to claim 1, characterized by the fact that:
said support ring retracts from the wall when said compression force acting on said sealing element (14) is removed.
[3]
3. Buffer, according to claim 1, characterized by the fact that:
Petition 870190101799, of 10/10/2019, p. 10/17
2/4 said support (26) comprises an annular shape that surrounds said mandrel (12) to define an open annular space between them; and a taper (27) disposed at an open end of said support (26).
[4]
4. Buffer, according to claim 3, characterized by the fact that:
said support ring (20) comprises a plurality of overlapping petals which extend beyond said taper (27) and which have a base within said annular space.
[5]
5. Buffer, according to claim 4, characterized by the fact that:
said at least one support ring (20) comprises a plurality of support rings, each having a plurality of petals in overlap with the petals of a ring displaced circumferentially from the petals in an adjacent ring so that the side surfaces of the petal are not in alignment.
[6]
6. Buffer, according to claim 5, characterized by the fact that:
said at least one sealing element (14) comprises a plurality of sealing elements, each with an associated support ring (20), wherein at least two support rings are oriented in a mirror image.
[7]
7. Buffer, according to claim 6, characterized by the fact that:
said sealing elements expand above 25% to be in contact with the wall in the defined position.
[8]
8. Buffer, according to claim 1, characterized by the fact that:
said support ring (20) comprises a plurality of
Petition 870190101799, of 10/10/2019, p. 11/17
3/4 overlapping petals that extend beyond said support (26).
[9]
9. Buffer, according to claim 8, characterized by the fact that:
said at least one support ring (20) comprises a plurality of support rings, each having a plurality of petals in overlap with the petals of a ring displaced circumferentially from the petals in an adjacent ring so that the side surfaces of the petal are not in alignment.
[10]
10. Buffer, according to claim 9, characterized by the fact that:
said petals comprise elongated flat metal members with parallel or tapered lateral surfaces.
[11]
11. Buffer, according to claim 8, characterized by the fact that:
said petals are elastically deformed to be in contact with the wall and supported when contacting said wall by a tapered member located between said petals and said sealing element (14) on one side and said support (26) on the opposite side of said petals.
[12]
12. Buffer, according to claim 11, characterized by the fact that:
said support (26) is selectively movable with respect to said mandrel (12) and has a front taper (27) to be in contact with said petals.
[13]
13. Buffer, according to claim 12, characterized by the fact that:
said support (26) comprises an annular shape that surrounds said mandrel (12) to define an open annular space between them; and said front taper (27) arranged in a
Petition 870190101799, of 10/10/2019, p. 12/17
4/4 open end to said support (26).
[14]
14. Buffer, according to claim 13, characterized by the fact that:
said overlapping petals extend beyond said front taper (27) and have a base within said annular space.
[15]
15. Buffer, according to claim 14, characterized by the fact that:
said petals move away from said wall when the compression on said sealing element (14) is released.
[16]
16. Buffer, according to claim 15, characterized by the fact that:
said sealing element expands above 25% to be in contact with the wall in the defined position.

类似技术:

公开号 | 公开日 | 专利标题

BR112013003448B1|2020-03-03|High expansion retractable plug for underground use

US9291028B2|2016-03-22|Plugging device

CA2567160C|2011-08-23|Anchoring system and method

BR112013012492B1|2020-10-27|anti-extrusion support system and method to operate within a tubular

US20140284047A1|2014-09-25|Expandable packer

AU2013263189A1|2014-11-13|Packing element backup system

BR112013031067B1|2020-12-22|support device to prevent extrusion

US10253592B2|2019-04-09|Anti-extrusion barrier for packing element

US9945205B2|2018-04-17|Plugging device

US11268336B2|2022-03-08|Well tool device comprising a ratchet system

US10174581B2|2019-01-08|Method and apparatus to utilize a deformable filler ring

RU2495228C1|2013-10-10|Packing unit for packer

RU2107803C1|1998-03-27|Packer of double-side action

BR102013000181A2|2013-11-05|HIGH PRESSURE LOCKING ASSEMBLY

同族专利:

公开号 | 公开日

WO2012024063A2|2012-02-23|

AU2011292379B2|2014-05-29|

AU2011292379A1|2013-01-31|

GB2498267B|2015-11-04|

CA2807512A1|2012-02-23|

GB201300704D0|2013-02-27|

AU2011292379C1|2014-09-25|

NO20130053A1|2013-02-12|

MY166962A|2018-07-26|

WO2012024063A3|2012-04-12|

US8393388B2|2013-03-12|

BR112013003448A2|2017-07-11|

US20120037355A1|2012-02-16|

GB2498267A|2013-07-10|

CA2807512C|2014-12-09|

引用文献:

公开号 | 申请日 | 公开日 | 申请人 | 专利标题

US3292938A|1963-12-16|1966-12-20|Otis Eng Co|Well packers|

US3420307A|1966-11-14|1969-01-07|Baker Oil Tools Inc|Retrievable packer|

US3450204A|1967-09-06|1969-06-17|Brown Oil Tools|Well casing hanger|

US3554280A|1969-01-21|1971-01-12|Dresser Ind|Well packer and sealing elements therefor|

US3666010A|1970-06-11|1972-05-30|Halliburton Co|Packer sleeves|

US4281840A|1980-04-28|1981-08-04|Halliburton Company|High temperature packer element for well bores|

US4611658A|1984-09-26|1986-09-16|Baker Oil Tools, Inc.|High pressure retrievable gravel packing apparatus|

US4765404A|1987-04-13|1988-08-23|Drilex Systems, Inc.|Whipstock packer assembly|

US4745972A|1987-06-10|1988-05-24|Hughes Tool Company|Well packer having extrusion preventing rings|

US5390737A|1990-04-26|1995-02-21|Halliburton Company|Downhole tool with sliding valve|

US5271468A|1990-04-26|1993-12-21|Halliburton Company|Downhole tool apparatus with non-metallic components and methods of drilling thereof|

US5511620A|1992-01-29|1996-04-30|Baugh; John L.|Straight Bore metal-to-metal wellbore seal apparatus and method of sealing in a wellbore|

US5215145A|1992-02-14|1993-06-01|Baker Hughes Incorporated|Wedge-set sealing flap for use in subterranean wellbores|

US5261492A|1992-03-31|1993-11-16|Halliburton Company|Well casing apparatus and method|

US5678635A|1994-04-06|1997-10-21|Tiw Corporation|Thru tubing bridge plug and method|

US5613555A|1994-12-22|1997-03-25|Dowell, A Division Of Schlumberger Technology Corporation|Inflatable packer with wide slat reinforcement|

US5701954A|1996-03-06|1997-12-30|Halliburton Energy Services, Inc.|High temperature, high pressure retrievable packer|

US5829524A|1996-05-07|1998-11-03|Baker Hughes Incorporated|High pressure casing patch|

US5857520A|1996-11-14|1999-01-12|Halliburton Energy Services, Inc.|Backup shoe for well packer|

US5775429A|1997-02-03|1998-07-07|Pes, Inc.|Downhole packer|

US6112811A|1998-01-08|2000-09-05|Halliburton Energy Services, Inc.|Service packer with spaced apart dual-slips|

US6102117A|1998-05-22|2000-08-15|Halliburton Energy Services, Inc.|Retrievable high pressure, high temperature packer apparatus with anti-extrusion system|

GB9814077D0|1998-06-30|1998-08-26|Plexus Ocean Syst Ltd|Casing hanger system|

US6318461B1|1999-05-11|2001-11-20|James V. Carisella|High expansion elastomeric plug|

US6164375A|1999-05-11|2000-12-26|Carisella; James V.|Apparatus and method for manipulating an auxiliary tool within a subterranean well|

US6311778B1|2000-04-18|2001-11-06|Carisella & Cook Ventures|Assembly and subterranean well tool and method of use|

US20020070503A1|2000-12-08|2002-06-13|Zimmerman Patrick J.|High temperature and pressure element system|

US6715560B2|2001-03-01|2004-04-06|Baker Hughes Incorporated|Collet-cone slip system for releasably securing well tools|

US6536532B2|2001-03-01|2003-03-25|Baker Hughes Incorporated|Lock ring for pipe slip pick-up ring|

US6712153B2|2001-06-27|2004-03-30|Weatherford/Lamb, Inc.|Resin impregnated continuous fiber plug with non-metallic element system|

US6666276B1|2001-10-19|2003-12-23|John M. Yokley|Downhole radial set packer element|

US6705615B2|2001-10-31|2004-03-16|Dril-Quip, Inc.|Sealing system and method|

US6769491B2|2002-06-07|2004-08-03|Weatherford/Lamb, Inc.|Anchoring and sealing system for a downhole tool|

US6695051B2|2002-06-10|2004-02-24|Halliburton Energy Services, Inc.|Expandable retaining shoe|

US6796376B2|2002-07-02|2004-09-28|Warren L. Frazier|Composite bridge plug system|

US7128145B2|2002-08-19|2006-10-31|Baker Hughes Incorporated|High expansion sealing device with leak path closures|

US6854522B2|2002-09-23|2005-02-15|Halliburton Energy Services, Inc.|Annular isolators for expandable tubulars in wellbores|

US6827150B2|2002-10-09|2004-12-07|Weatherford/Lamb, Inc.|High expansion packer|

US7004248B2|2003-01-09|2006-02-28|Weatherford/Lamb, Inc.|High expansion non-elastomeric straddle tool|

US6848505B2|2003-01-29|2005-02-01|Baker Hughes Incorporated|Alternative method to cementing casing and liners|

US20040149429A1|2003-02-04|2004-08-05|Halit Dilber|High expansion plug with stacked cups|

US7017672B2|2003-05-02|2006-03-28|Go Ii Oil Tools, Inc.|Self-set bridge plug|

US6962206B2|2003-05-15|2005-11-08|Weatherford/Lamb, Inc.|Packer with metal sealing element|

FR2856456B1|2003-06-20|2005-09-09|Schlumberger Services Petrol|SEALING DEVICE FOR TEMPORARILY SHUTTING A WELL OR PIPE.|

WO2005061848A1|2003-12-02|2005-07-07|Baker Hughes Incorporated|Setting method for coiled tubing run, through tubing bridge plug|

US7708080B2|2005-06-23|2010-05-04|Schlumberger Technology Corporation|Packer|

EP1757770A1|2005-08-25|2007-02-28|Services Petroliers Schlumberger |Method and apparatus to set a plug in a wellbore|

US20070056725A1|2005-09-09|2007-03-15|Chad Lucas|Seal assembly|

US7475736B2|2005-11-10|2009-01-13|Bj Services Company|Self centralizing non-rotational slip and cone system for downhole tools|

US7621322B2|2005-11-16|2009-11-24|Baker Hughes Incorporated|Thru-tubing high expansion inflatable seal with mechanical anchoring system and method|

US7392841B2|2005-12-28|2008-07-01|Baker Hughes Incorporated|Self boosting packing element|

US7673692B2|2006-02-17|2010-03-09|Bj Tool Services Ltd.|Eutectic material-based seal element for packers|

US7510015B2|2006-02-23|2009-03-31|Schlumberger Technology Corporation|Packers and methods of use|

US7513309B2|2006-02-24|2009-04-07|Deltide Fishing And Rental Tools, Inc.|Apparatus for connecting underwater tubular members|

US7735567B2|2006-04-13|2010-06-15|Baker Hughes Incorporated|Packer sealing element with shape memory material and associated method|

US7552768B2|2006-07-26|2009-06-30|Baker Hughes Incorporated|Swelling packer element with enhanced sealing force|

US7373973B2|2006-09-13|2008-05-20|Halliburton Energy Services, Inc.|Packer element retaining system|

US7578353B2|2006-09-22|2009-08-25|Robert Bradley Cook|Apparatus for controlling slip deployment in a downhole device|

US7478679B2|2006-12-06|2009-01-20|Baker Hughes Incorporated|Field assembled packer|

US7806193B2|2007-06-06|2010-10-05|Baker Hughes Incorporated|Swellable packer with back-up systems|

GB2451099B|2007-07-18|2012-04-04|Red Spider Technology Ltd|Support assembley for downhole tool, downhole tool and method|

US20090255690A1|2008-04-09|2009-10-15|Baker Hughes Incorporated|Multi-Piece Packing Element Containment System|

US8037942B2|2008-06-26|2011-10-18|Baker Hughes Incorporated|Resettable antiextrusion backup system and method|

US8307891B2|2009-01-28|2012-11-13|Baker Hughes Incorporated|Retractable downhole backup assembly for circumferential seal support|

US20100258311A1|2009-04-09|2010-10-14|Craig Daniel T|Casing Patch and Seal|

GB2469870A|2009-05-01|2010-11-03|Swelltec Ltd|Support assembly for a downhole tool|

US8127978B2|2009-05-20|2012-03-06|Baker Hughes Incorporated|Swelling packer and method of construction|

US8408290B2|2009-10-05|2013-04-02|Halliburton Energy Services, Inc.|Interchangeable drillable tool|

US8439082B2|2010-06-25|2013-05-14|Baker Hughes Incorporated|Retention mechanism for subterranean seals experiencing differential pressure|

US8151873B1|2011-02-24|2012-04-10|Baker Hughes Incorporated|Expandable packer with mandrel undercuts and sealing boost feature|US8701787B2|2011-02-28|2014-04-22|Schlumberger Technology Corporation|Metal expandable element back-up ring for high pressure/high temperature packer|

US8955606B2|2011-06-03|2015-02-17|Baker Hughes Incorporated|Sealing devices for sealing inner wall surfaces of a wellbore and methods ofinstalling same in a wellbore|

US8905149B2|2011-06-08|2014-12-09|Baker Hughes Incorporated|Expandable seal with conforming ribs|

US8839874B2|2012-05-15|2014-09-23|Baker Hughes Incorporated|Packing element backup system|

GB2504319A|2012-07-26|2014-01-29|Rubberatkins Ltd|Annular seal back up assembly|

US9341044B2|2012-11-13|2016-05-17|Baker Hughes Incorporated|Self-energized seal or centralizer and associated setting and retraction mechanism|

US9163474B2|2012-11-16|2015-10-20|Baker Hughes Incorporated|Shape memory cup seal and method of use|

US9243490B2|2012-12-19|2016-01-26|Baker Hughes Incorporated|Electronically set and retrievable isolation devices for wellbores and methods thereof|

US9706874B1|2013-02-28|2017-07-18|Gary Ross|Hot tea and coffee press convertible into an iced tea and coffee press including special hot liquid drinking container|

US9587458B2|2013-03-12|2017-03-07|Weatherford Technology Holdings, Llc|Split foldback rings with anti-hooping band|

WO2014160972A2|2013-03-29|2014-10-02|Weatherford/Lamb, Inc.|Big gap element sealing system|

EP3049612A4|2013-09-24|2017-10-18|Halliburton Energy Services, Inc.|Reinforced drill pipe seal with floating backup layer|

GB201412665D0|2014-07-16|2014-08-27|Omega Completion Technology|Elastically deformable support for an expandable seal element of a downhole tool|

US10704355B2|2016-01-06|2020-07-07|Baker Hughes, A Ge Company, Llc|Slotted anti-extrusion ring assembly|

WO2017177119A1|2016-04-07|2017-10-12|Team Oil Tools, Lp|Packer with pivotable anti-extrusion elements|

WO2017184449A2|2016-04-18|2017-10-26|Parker-Hannifin Corporation|Expandable backup ring|

US10526864B2|2017-04-13|2020-01-07|Baker Hughes, A Ge Company, Llc|Seal backup, seal system and wellbore system|

US20180298718A1|2017-04-13|2018-10-18|Baker Hughes Incorporated|Multi-layer Packer Backup Ring with Closed Extrusion Gaps|

US10370935B2|2017-07-14|2019-08-06|Baker Hughes, A Ge Company, Llc|Packer assembly including a support ring|

US10677014B2|2017-09-11|2020-06-09|Baker Hughes, A Ge Company, Llc|Multi-layer backup ring including interlock members|

US10689942B2|2017-09-11|2020-06-23|Baker Hughes, A Ge Company, Llc|Multi-layer packer backup ring with closed extrusion gaps|

US10907438B2|2017-09-11|2021-02-02|Baker Hughes, A Ge Company, Llc|Multi-layer backup ring|

US10590731B2|2017-09-28|2020-03-17|Halliburton Energy Services, Inc.|Retrieval of a sealing assembly|

EP3841279A1|2018-08-20|2021-06-30|Northstar Drillstem Testers|Anti-extrusion assembly and a sealing system comprising same|

AU2020218183A1|2019-02-05|2021-07-15|Weatherford Technology Holdings, Llc|Retrievable anti-extrusion fold-back ring backup for seal element|

US10907437B2|2019-03-28|2021-02-02|Baker Hughes Oilfield Operations Llc|Multi-layer backup ring|

US11236578B2|2019-11-27|2022-02-01|Halliburton Energy Services, Inc.|Zero extrusion gap barrier device used on packing elements|

US11142978B2|2019-12-12|2021-10-12|Baker Hughes Oilfield Operations Llc|Packer assembly including an interlock feature|

US11174698B1|2020-12-18|2021-11-16|Halliburton Energy Services, Inc.|Rotating control device element reinforcement petals|

法律状态:
2018-12-26| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|

2019-07-30| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|

2019-12-24| B09A| Decision: intention to grant|

2020-03-03| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/07/2011, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

US12/857,259|US8393388B2|2010-08-16|2010-08-16|Retractable petal collet backup for a subterranean seal|

US12/857,259|2010-08-16|

PCT/US2011/045283|WO2012024063A2|2010-08-16|2011-07-26|Retractable petal collet backup for a subterranean seal|

[返回顶部]