EP0960262B1 - Device by a retrievable bridge plug - Google Patents
Device by a retrievable bridge plug Download PDFInfo
- Publication number
- EP0960262B1 EP0960262B1 EP98901587A EP98901587A EP0960262B1 EP 0960262 B1 EP0960262 B1 EP 0960262B1 EP 98901587 A EP98901587 A EP 98901587A EP 98901587 A EP98901587 A EP 98901587A EP 0960262 B1 EP0960262 B1 EP 0960262B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- packer
- chain
- pin
- packer element
- bridge plug
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000004888 barrier function Effects 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
- E21B33/1216—Anti-extrusion means, e.g. means to prevent cold flow of rubber packing
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
- E21B33/1293—Packers; Plugs with mechanical slips for hooking into the casing with means for anchoring against downward and upward movement
Definitions
- the present invention concerns generally retrievable bridge plugs, but more specifically a drawable mechanical barrier having a packer element, according to the introductory part of patent claim 1.
- bridge plugs are used for oil- and gas wells.
- Such bridge plugs (see for example US-A-4 554 973 have a packer element which seals against fluid and pressure.
- the packer element is comprised mainly of an elastic rubber body sealing against the pressure, and mechanical barriers preventing extrusion of the rubber at pressure load.
- the bridge plug will, in many cases, have to pass restrictions such as, for example, valves and nipples, for subsequent location in a larger diameter.
- Known retrievable bridge plugs have a limited degree of expansion at a high pressure and a high temperature. The limitation in the degree of expansion is mainly caused by the construction of the drawable mechanical barrier.
- a mechanical barrier is developed, which through an axial movement is expanded and then drawn through an opposite movement.
- the bridge plug changes pressure direction from one side to the other side.
- two packer elements are installed, having a mechanical barrier inbetween.
- the rubber When the packer elements are expanded, the rubber will be forced out radially along the mechanical barrier, and up against the casing.
- the mechanical barrier In expanded position, the mechanical barrier has a wedge shape up against the casing. By applying pressure, the packer element will creep into the radial wedge shape, and seal. This wedge shape also has a positive effect to the sealing property of the packer element at increasing pressure load. If the bridge plug should seal against differential pressure from one side, a mechanical barrier with a packer element is installed at the pressure side.
- the mechanical barrier positions the mechanical bridge plug in the centre, and thus avoids the extra strain on the packer element from the bridge plug's own weight.
- the mechanical barrier according to the present invention has a construction whereby it is possible to be actively drawn when running into restrictions. This is performed when the mechanical barrier is subjected to tension, which then leads to the chain pairs rotating around their belonging bolts, thus forcing them against the centre of the bridge plug.
- the mechanical barrier has a construction making it functionally reliable during the aggregation of sand above the bridge plug.
- the mechanical barrier being situated between two packer elements is advantageous in this respect.
- Fig. 1 shows a sketch of a retrievable bridge plug, generally denoted 30, set in a casing 31 in a horizontal well.
- the bridge plug 30 comprises an anchoring part 32 and a mechanical barrier 1 with packer elements, which are expanded against the casing 31.
- Fig. 2 illustrates a device according to the present invention, in the form of a mechanical barrier 1 having two packer elements 3, 11 which are arranged at the bridge plug (not shown in Fig. 2), in order to be inserted in, and expanded in the casing (not shown in Fig 2).
- the device includes a through axle 15 with an external upper packer bracket 2, connecting the upper end (not shown) with upper packer element 3.
- the upper packer element 3 is connected through an upper clamping section 4 via first pin 5 to an upper chain 6.
- the upper chain 6 is rotatably connected with lower chain 8 by a second pin 7.
- the lower chain 8 is connected to a lower clamping section 10 by a third pin 9.
- Lower clamping section 10 is connected with the lower packer element 11 that is then connected with the lower end of the bridge plug, through a lower packer clamp 12.
- Fig. 2 the device according to the present invention is shown with the mechanical barrier 1 and the packer elements 3, 11 in drawn (not expanded) condition.
- An angle ⁇ is formed through the longitudinal axis of the bridge plug and a line extending between first pin 5 and second pin 7. The angle ⁇ is larger then zero, and preferably less then 45° when the mechanical barrier is in this drawn condition.
- Fig. 3 the device is shown in expanded position, where upper packer bracket 2 is forced against lower packer bracket 12 with the result that upper packer element 3 is compressed and expanded radially.
- the axial force propagates further down to the upper chain 6 that due to the angle of departure ⁇ (Fig. 2) will rotate around the pin 5 and tip out radially. This will cause the split pipe 18 to bend outwards and be formed around the periphery of the chain pairs 6 and 8.
- the lower clamping section 10 will compress the packer element 11 which then will expand radially.
- An upper U-shaped packer 13 is installed in the upper clamping section 2 and a lower U-shaped packer 14 is installed in the lower clamping section 12.
- Upper U-shaped packer 13 has the function of sealing when the packer element 3 is pressurized, and to drain an enclosed volume C when the packer element 3 is pressurized.
- Lower U-shaped packer 14 is shown in detail in Fig. 3a.
- Fig. 4 shows a section view of the mechanical barrier 1 in expanded condition.
- the pipe 18 is split in a number corresponding to the number of rotatable chain pairs 6 and 8.
- the pipe 18 is oriented in relation to chain pairs 6 and 8, so that each axial split of the pipe 18 is situated above the middle of each chain pair 6 and 8.
- the split pipe 18 is supported by the chain pairs 6, 8, so that the mechanical barrier in expanded condition forms a completely sealed barrier.
- Fig. 5 shows a chain pair comprising rotatable chain 6 and rotatable chain 8.
- the chain pair 6, 8 is shown in expanded condition, and without belonging pins.
- Each of the chains 6, 8 is comprised an arm section 19a, 19b with belonging holes 20a, 20b for first and third pin 5 and 9, respectively.
- the arm sections 19a, 19b are rigidly connected to head section 21a, 21b.
- the head sections 21a, 21b are at their upper end, formed so that the chains 6, 8 can engage each other, as the second pin (not shown) is brought through hole 25 at the upper end.
- the head sections 21a, 21b have profiled support surfaces 22a, 22b that are rounded in the axial direction of mechanical barrier 1.
- the support surfaces 22a, 22b recede into inclined covering surfaces 23, which again recede into inclined end surfaces 24a, 24b.
- the chains 6, 8 are constructed so that they, in expanded condition, shall form as large an external supporting surface as possible, in order to give the best possible support for the split pipe 18.
- the optimum width of the chain pairs 6, 8 is the length of the cord belonging to the arc calculated from the circumference of unexpanded bridge plug divided by the number of chain pairs 6, 8. Where the width is the distance between the two external limitations of the chains 6, 8, consisting of the points where the inclined cover surface 23 recedes to inclined end surfaces 24a, 24b.
- the chains 6, 8 are constructed for achieve a large mechanical strength, so that they can bear the influence from the pressure forces that can occur.
- the end surfaces 24a, 24b are shaped with an inclination as described above.
Landscapes
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Pens And Brushes (AREA)
- Pipe Accessories (AREA)
- Endoscopes (AREA)
- Earth Drilling (AREA)
- Devices For Opening Bottles Or Cans (AREA)
- Seal Device For Vehicle (AREA)
Description
Claims (4)
- Device for use with a retrievable bridge plug (30) comprising a through axle (15), with an external upper packer bracket (2) that is connected with an upper packer element (3), and with an external lower packer bracket (12) that is connected with a lower packer element (11), characterized in that
the upper packer element (3) is connected through an upper clamping section (4) to a chain (6), said upper chain (6) being rotatably connected with the upper clamping section (4) by a first pin (5),
the upper chain (6) is rotatably connected to a lower chain (8) by a second pin (7), and lower chain (8) is rotatably connected to a lower clamping section (10) by a third pin (9), so that an angle (α) is formed between the longitudinal axis of the bridge plug and a line extending through the first pin (5) and the second pin (7), and correspondingly through the second pin (7) and the third pin (9) which is greater then zero when upper chain (6) and lower chain (8) is drawn, whereas upper chain (6) and lower chain (8) are arranged for, at setting, to expand radially by compression of the upper packer bracket (3) against lower packer bracket (12), for forming a mechanical barrier for upper packer element (3) and lower packer element (11). - Device according to Claim 1,
characterized in that upper chain (6) and lower chain (8) are covered by a flexible split. pipe (18), that in expanded condition together with the chain pairs (6, 8) forms a mechanical barrier that forms a sealed wall between a casing (31) and the bridge plug (30). - Device according to either of claims 1 or 2,
characterized by a plurality of chain pairs (6, 8), preferably two, three, four, five or six, being arranged around the circumference of axle (15). - Device according to any one of claims 1 to 3,
characterized in that an upper U-shaped packer (13) is installed in upper clamping section (2) and lower U-shaped packer (14) is installed in lower clamping section (12), wherein upper U-shaped packer (13) is arranged for sealing when the packer element (3) is pressurized, and draining an enclosed volume (C) at the chain pairs (6, 8) when the packer element (11) is pressurized, and lower U-shaped packer (14) is arranged for sealing when the packer element (3) is pressurized, and draining a volume (C) when the packer element (3) is pressurized.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO970561A NO304615B1 (en) | 1997-02-06 | 1997-02-06 | Device for retrievable bridge plug |
NO970561 | 1997-02-06 | ||
PCT/NO1998/000009 WO1998035130A1 (en) | 1997-02-06 | 1998-01-13 | Device by a retrievable bridge plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0960262A1 EP0960262A1 (en) | 1999-12-01 |
EP0960262B1 true EP0960262B1 (en) | 2003-07-16 |
Family
ID=19900355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98901587A Expired - Lifetime EP0960262B1 (en) | 1997-02-06 | 1998-01-13 | Device by a retrievable bridge plug |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0960262B1 (en) |
AU (1) | AU726860B2 (en) |
BR (1) | BR9807558A (en) |
CA (1) | CA2279374A1 (en) |
NO (1) | NO304615B1 (en) |
WO (1) | WO1998035130A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9528341B2 (en) | 2014-03-25 | 2016-12-27 | Baker Hughes Incorporated | Continuous expandable backup ring for a seal with retraction capability |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4554973A (en) * | 1983-10-24 | 1985-11-26 | Schlumberger Technology Corporation | Apparatus for sealing a well casing |
US4588029A (en) * | 1984-09-27 | 1986-05-13 | Camco, Incorporated | Expandable metal seal for a well tool |
US5010958A (en) * | 1990-06-05 | 1991-04-30 | Schlumberger Technology Corporation | Multiple cup bridge plug for sealing a well casing and method |
-
1997
- 1997-02-06 NO NO970561A patent/NO304615B1/en not_active IP Right Cessation
-
1998
- 1998-01-13 EP EP98901587A patent/EP0960262B1/en not_active Expired - Lifetime
- 1998-01-13 AU AU57822/98A patent/AU726860B2/en not_active Ceased
- 1998-01-13 WO PCT/NO1998/000009 patent/WO1998035130A1/en active IP Right Grant
- 1998-01-13 CA CA002279374A patent/CA2279374A1/en not_active Abandoned
- 1998-01-13 BR BR9807558-6A patent/BR9807558A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
BR9807558A (en) | 2000-02-01 |
WO1998035130A1 (en) | 1998-08-13 |
NO970561L (en) | 1998-08-07 |
NO970561D0 (en) | 1997-02-06 |
CA2279374A1 (en) | 1998-08-13 |
AU726860B2 (en) | 2000-11-23 |
AU5782298A (en) | 1998-08-26 |
NO304615B1 (en) | 1999-01-18 |
EP0960262A1 (en) | 1999-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN1327104C (en) | A cable duct device in a swelling packer | |
US4886117A (en) | Inflatable well packers | |
US4424861A (en) | Inflatable anchor element and packer employing same | |
CA2699877C (en) | Low stress traction system | |
US8997854B2 (en) | Swellable packer anchors | |
CA2765193C (en) | Swellable packer with enhanced sealing capability | |
US7178602B2 (en) | Method and device related to a retrievable well plug | |
US6234249B1 (en) | Device for use with a retrievable bridge plug | |
US11834924B2 (en) | Expanding and collapsing apparatus with seal pressure equalization | |
AU6947696A (en) | Expandable retrievable bridge plug | |
CN111963098B (en) | Compression packer | |
EP0960262B1 (en) | Device by a retrievable bridge plug | |
CA2367637A1 (en) | Inflation element for a downhole tool, method and shaping tool for pre-disposing the bladder | |
US5236201A (en) | Reinforcement structure for inflatable downhole packers | |
US4421139A (en) | Plug for offshore platforms and the like | |
US2704581A (en) | Well packers | |
US6007067A (en) | Multi-operational expansion gasket | |
CA1276547C (en) | Inflatable well packers | |
WO2024146769A1 (en) | A well tool device for forming a seal in a well | |
CA2081395C (en) | Reinforcement structure for inflatable downhole packers | |
CN118065973A (en) | Anti-slip air bag structure for treating tunnel water burst | |
JPH032416A (en) | Diagonal permanent foundation anchor, construction method thereof and holder for construction |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19990713 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DK FR GB NL |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PEDERSEN, DAG, RAVN Inventor name: ANDERSEN, FRODE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BROENNTEKNOLOGIUTVIKLING A/S |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BROENNTEKNOLOGIUTVIKLING AS |
|
AK | Designated contracting states |
Designated state(s): DK FR GB NL |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030716 Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20030716 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20031016 |
|
NLV1 | Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20040419 |
|
EN | Fr: translation not filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20170119 Year of fee payment: 20 |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: PE20 Expiry date: 20180112 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION Effective date: 20180112 |