EP2723973A2 - Plug, and methods for setting and releasing the plug - Google Patents
Plug, and methods for setting and releasing the plugInfo
- Publication number
- EP2723973A2 EP2723973A2 EP12746121.8A EP12746121A EP2723973A2 EP 2723973 A2 EP2723973 A2 EP 2723973A2 EP 12746121 A EP12746121 A EP 12746121A EP 2723973 A2 EP2723973 A2 EP 2723973A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- plug
- locking element
- pipe
- setting
- locking
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000033001 locomotion Effects 0.000 claims abstract description 37
- 238000012856 packing Methods 0.000 claims description 16
- 239000012530 fluid Substances 0.000 claims description 10
- 230000004913 activation Effects 0.000 claims description 5
- 239000004215 Carbon black (E152) Substances 0.000 claims description 3
- 229930195733 hydrocarbon Natural products 0.000 claims description 3
- 150000002430 hydrocarbons Chemical class 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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
- E21B33/129—Packers; Plugs with mechanical slips for hooking into the casing
-
- 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
- E21B23/06—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting packers
-
- 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
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
- E21B33/134—Bridging plugs
Definitions
- Plug and methods for setting and releasing the plug
- the present invention relates to a plug and to methods for setting and releasing the plug in a well, for example, a hydrocarbon well, as disclosed in the independent apparatus claim and in the independent method claims.
- plugs It is common practice to close off the borehole, either temporarily or permanently, by using plugs.
- the background for this may be that it is desirable, for example, to carry out tests or maintenance in the well.
- the plugs are usually run down the well using a running tool. When the plug has reached the desired depth in the well, it is secured to the surrounding casing or borehole wall using anchoring elements. The borehole is subsequently sealed, often by using packers which seal the area between the pipe or plug and the borehole wall.
- packers which seal the area between the pipe or plug and the borehole wall.
- the bridge plug shown in US 6220348 Bl, and the whole running tool must be pulled out of the well if another operation is to be carried out in the well, which will mean a great deal of extra time and costs.
- the object is achieved by means of a plug and methods for its setting and release according to the independent claims, with embodiments of the invention disclosed in the dependent claims.
- the setting and release take place essentially by means of axial movement of the pipe. By this is meant that an up-and-down movement applied to the plug is transmitted into a rotational movement that applies to the plug a moment which it wishes to release through a locking system.
- Another object is to provide a plug which can be used for several operations in a well with little call for maintenance of the plug between the different operations.
- a plug for a hydrocarbon well wherein the plug can be held in place relative to a casing/borehole, and wherein the plug further comprises a slip actuator for setting and releasing slips, a locking element in contact with the slip actuator, and one or more resilient packing elements which are adapted for sealing against the casing/borehole wall, and wherein the locking element comprises multiple parts having internal threads which constitute an enclosure around threads on a pipe, and where on the radial outer surface of the locking element there are arranged resilient elements, and that the locking element, when setting the plug, is capable of sliding over the pipe threads for movement of the slip actuator and setting of the slips, and that the locking element comes into engagement with a locking sleeve to prevent rotation of the locking element,
- the invention also relates to a method for setting the plug in a well, wherein the setting is activated by an axial movement of the pipe, and where the movement further causes a guide sleeve to apply a force on the locking element which, by means of its high-pitch threads against the pipe, will slide over the threads and exert a force on the slip actuator which presses the slips out into firm engagement with the casing/borehole wall.
- high-pitch threads here is meant threads that will rotate off a corresponding threaded part in only a few turns.
- the invention relates also to a method for releasing the plug wherein an axial movement of the pipe activates the release of the locking sleeve from the locking element, such that the locking element is free to rotate off the threads on the pipe and the slips are released.
- Axial movement may be a movement up or down, or a combination thereof.
- a first and a second hydraulic timer may be provided in connection with the plug for setting and release, respectively.
- the timers one for setting and one for release, ensure that the setting or release does not start until the pressure from the surface acts over a given time period.
- the timers each consist of two hydraulic fluid chambers, where fluid from one of the chambers starts to flow over into the other chamber as a result of pressure that is applied to the pipe from the surface. If the pressure is not applied for a sufficiently long time, as, for example, on the heave of the waves, all the fluid will not flow between the chambers, and the setting or the release will not be started. Once all the fluid has flowed between the chambers, the setting or the release will start.
- the pipe there may be provided at least one fixed pin that is movable in a recess in a guide sleeve on the plug.
- the recess in the guide sleeve may be helical. This makes it possible for the operator to know at all times where the plug is in the setting or release process, in that the pin element follows the axial movements of the pipe, up-down-up, as the pipe is pushed down into the well or pulled upwards. An axial movement of the pipe, and thus of the pin in the recess, will cause the axial movement to be transmitted into a rotational movement of the guide sleeve depending on the form of the recess.
- a holding member with radially acting elements can hold the plug essentially fixed to the casing/borehole wall during the setting.
- the holding member will be in end contact with a guide sleeve, and a locking element will be in end contact with the second end of the guide sleeve.
- the setting involves that a locking element with locking grooves, which during setting of the plug is so arranged as to allow the locking element on an axial movement of the pipe to slide over corresponding threads on the pipe, engages with corresponding locking pins on the locking sleeve and is prevented from being screwed off the threads.
- the locking sleeve is held fixed in the rotational direction, but is movable in an axial direction relative to the pipe.
- the configuration of the locking grooves on the locking element and the locking pins on the locking sleeve may be any configuration suitable to prevent rotation.
- the axial movement of the pipe will set slips, and the plug will be anchored to the casing/borehole wall.
- Resilient packing elements arranged on the plug seal against the casing/borehole wall when compressed.
- one or more backstop elements are provided which are fixed relative to the pipe. The backstop elements follow the movement of the pipe, and a further movement of the pipe, after the slips have been set, will cause the resilient packing elements to be compressed between the slips and the backstop elements.
- the pipe When releasing the plug, the pipe is by means of the running tool run down to the plug.
- a timer controls the activation of the release. After the activation of the timer, the pipe is moved a given length. This movement causes the slips to be released thereby releasing the anchoring against the casing/borehole wall, and the
- Figure 1 shows a plug coupled to a running tool and a pipe at the start of setting
- Figure 2 shows the setting according to Figure 1 with the slips out
- FIG. 3 shows the beginning of the release of the plug
- FIG. 4 shows the release of the plug
- Figure 5 shows a locking element on the outer surface of a pipe, and a locking sleeve
- Figure 6A shows a pin arranged on a pipe, where the pin is in a first position, movable in a recess on a guide sleeve;
- Figure 6B shows the pin in a second position, where the pipe is pulled towards the surface
- Figure 6C shows the position of the pin in the recess as the setting process starts and the pipe is pushed downwards
- Figure 6D shows the pin in its end position when the setting process has been completed
- FIG. 7 shows the timer function of the present invention. Detailed description
- FIGS 1-4 show a plug 1 coupled to a running tool 13 and a pipe 15.
- the lower end of the plug is shown to the right in the figure.
- the internal pipe of the plug 1, the running tool 13 and the pipe 15 are referred to below as pipe 15.
- a holding member 10 with radially acting elements 12 for holding the plug fixed relative to the casing/ borehole wall, see Figure 2.
- a first 2 and a second 42 hydraulic timer which control the activation of the setting and the release of the plug 1.
- a pin 3 is arranged on the lower end of the pipe 15.
- a guide sleeve 4, which is a part of the plug 1, has a recess 16 in which the pin 3 can move.
- a rotatable locking element 5 Arranged in end contact with the guide sleeve 4 is a rotatable locking element 5, consisting of multiple parts, having internal high-pitch threads 17 capable of engaging with corresponding high-pitch threads 18 on the radial outer surface of the pipe 15, best shown in Figure 5. Furthermore, on the radial outer surface of the locking element 5 there are resilient elements 6 which form an enclosure around the parts that constitute the locking element 5.
- the locking element 5 has arranged at one of its end portions locking grooves 11 capable of engaging with corresponding locking pins 19 in a locking sleeve 7.
- the locking sleeve 7 is fixed in the rotational direction but is movable in an axial direction, see Figure 5.
- the locking grooves 11 on the locking element 5 are formed of radially inward facing pins.
- the corresponding locking pins 19 on the locking sleeve 7 consist of axially projecting pins, which are locked in the locking grooves 11 on the locking element 5.
- On the radial outer surface of the locking sleeve 7 is a slip actuator 8, which is capable of coming into contact with the locking element 5, see Figures 1 and 2.
- the slip actuator 8 has at least one conical end portion which is adapted for pushing slips 9 out into engagement with the casing/ borehole wall in order to secure the plug 1 in the well.
- resilient packers 20 are provided which seal between the pipe 15 or plug 1 and the casing/borehole wall.
- backstop elements 41 are arranged thereabove that are fixed relative to the pipe 15 and follow the movement of the pipe 15.
- Figures 6A-6D show, step by step, the position of the pin 3 in the recess 16 during the process of setting the plug 1.
- the time interval for how long pressure is to be applied to the pipe 15 is determined in advance, and is given by how long it takes before all fluid in the hydraulic timer 2 has migrated from the first chamber to the second chamber, see Figure 7.
- Such a time period is, for example, set to at least 20 seconds so as to prevent the axial movement of the pipe 15 from being confused with natural heave motions of the vessel owing to the motion of the sea.
- the first 2 and the second 42 hydraulic timer may therefore be regarded as a dampener for the setting and release, respectively, as it filters out the natural heave motions of the platform, and only activates the setting and release of the plug when the pressure on the pipe 15 has acted for at least as long as the predetermined time period.
- a holding member 10 with radially acting elements 12 on the plug 1 essentially holds the plug 1 fixed to the casing/borehole wall, see Figures 1-4.
- the pipe 15 is moved down and the pin 3 follows the vertical groove in Figures 6C and 6D in the recess 16 on the guide sleeve 4, whilst the radially acting elements 12 on the holding member 10 hold the plug 1 fixed relative to the casing/borehole wall.
- the resilient elements 6 on the outer surface of the locking element 5 have as their only purpose to hold together the multiple parts which constitute the locking element 5, and do not represent any major force on the locking element 5 in the radial direction against the pipe 15.
- the locking element 5 at its other end, is in abutment with a slip actuator 8 which rests against the radial outer surface of the locking sleeve 7. An upwardly directed movement of the locking element 5 will exert an upward movement on one end of the slip actuator 8.
- the slip actuator 8 may be conical at its other end and an upward axial movement of the slip actuator 8 will press the slips 9 out into engagement with the casing/borehole wall, see Figure 2.
- the resilient packing elements 20 When the slips 9 are no longer set, the resilient packing elements 20 will no longer be subjected to any force from below from the slips 9, but only from above by the backstop elements 41.
- the resilient packing elements 20 will therefore expand and act as a spring against the locking element 5 and press on the locking element 5 in an axial direction such that the locking element 5 rotates off the threads 18 on the pipe 15.
- the radially acting elements 12 on the holding element 10 will furthermore be released from the casing/borehole wall and the plug 1 is free to be removed from the well, see Figure 4.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Pipe Accessories (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20110908A NO334172B1 (en) | 2011-06-23 | 2011-06-23 | Plug, and methods for setting and releasing the plug |
PCT/IB2012/053191 WO2012176173A2 (en) | 2011-06-23 | 2012-06-25 | Plug, and methods for setting and releasing the plug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2723973A2 true EP2723973A2 (en) | 2014-04-30 |
EP2723973B1 EP2723973B1 (en) | 2015-10-14 |
Family
ID=46650832
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12746121.8A Not-in-force EP2723973B1 (en) | 2011-06-23 | 2012-06-25 | Plug, and methods for setting and releasing the plug |
Country Status (7)
Country | Link |
---|---|
US (1) | US20140209321A1 (en) |
EP (1) | EP2723973B1 (en) |
AU (1) | AU2012274911A1 (en) |
BR (1) | BR112013033256A2 (en) |
CA (1) | CA2840163A1 (en) |
NO (1) | NO334172B1 (en) |
WO (1) | WO2012176173A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9915121B2 (en) * | 2015-06-16 | 2018-03-13 | Baker Hughes, A Ge Company, Llc | Seal pressure relaxation device prior to release of retrievable packer |
CN107558949B (en) * | 2016-06-30 | 2023-07-11 | 万瑞(北京)科技有限公司 | Cable bridge plug setting tool |
US11035189B2 (en) * | 2019-04-01 | 2021-06-15 | Exacta-Frac Energy Services, Inc. | Compression-set straddle packer with fluid pressure-boosted packer set |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2713910A (en) * | 1950-06-19 | 1955-07-26 | Baker Oil Tools Inc | Releasable operating devices for subsurface well tools |
GB718976A (en) * | 1951-12-13 | 1954-11-24 | Baker Oil Tools Inc | Improvements in or relating to couplings for rods, tubes, and the like |
US3047071A (en) * | 1959-04-22 | 1962-07-31 | Guiberson Corp | Adapter assembly |
US3851706A (en) * | 1972-11-17 | 1974-12-03 | Dresser Ind | Well packer and retriever |
US5009265A (en) * | 1989-09-07 | 1991-04-23 | Drilex Systems, Inc. | Packer for wellhead repair unit |
US5697449A (en) * | 1995-11-22 | 1997-12-16 | Baker Hughes Incorporated | Apparatus and method for temporary subsurface well sealing and equipment anchoring |
US5941306A (en) * | 1997-10-07 | 1999-08-24 | Quinn; Desmond | Ratchet release mechanism for a retrievable well apparatus and a retrievable well apparatus |
US6220348B1 (en) | 1998-10-20 | 2001-04-24 | Polar Completions Engineering Inc. | Retrievable bridge plug and retrieving tool |
US6467547B2 (en) * | 2000-12-11 | 2002-10-22 | Weatherford/Lamb, Inc. | Hydraulic running tool with torque dampener |
US7607487B2 (en) * | 2005-02-14 | 2009-10-27 | Schlumberger Technology Corporation | Packers and methods of use |
-
2011
- 2011-06-23 NO NO20110908A patent/NO334172B1/en not_active IP Right Cessation
-
2012
- 2012-06-25 WO PCT/IB2012/053191 patent/WO2012176173A2/en active Application Filing
- 2012-06-25 US US14/128,714 patent/US20140209321A1/en not_active Abandoned
- 2012-06-25 EP EP12746121.8A patent/EP2723973B1/en not_active Not-in-force
- 2012-06-25 AU AU2012274911A patent/AU2012274911A1/en not_active Abandoned
- 2012-06-25 BR BR112013033256A patent/BR112013033256A2/en not_active IP Right Cessation
- 2012-06-25 CA CA2840163A patent/CA2840163A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2012176173A2 * |
Also Published As
Publication number | Publication date |
---|---|
BR112013033256A2 (en) | 2017-03-01 |
NO334172B1 (en) | 2013-12-30 |
EP2723973B1 (en) | 2015-10-14 |
CA2840163A1 (en) | 2012-12-27 |
US20140209321A1 (en) | 2014-07-31 |
WO2012176173A3 (en) | 2014-01-03 |
AU2012274911A1 (en) | 2014-01-23 |
WO2012176173A2 (en) | 2012-12-27 |
NO20110908A1 (en) | 2012-12-24 |
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