WO2010102015A1 - Hydraulically released window mill - Google Patents

Hydraulically released window mill Download PDF

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Publication number
WO2010102015A1
WO2010102015A1 PCT/US2010/026067 US2010026067W WO2010102015A1 WO 2010102015 A1 WO2010102015 A1 WO 2010102015A1 US 2010026067 W US2010026067 W US 2010026067W WO 2010102015 A1 WO2010102015 A1 WO 2010102015A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
component
affixation
fastener
mill
Prior art date
Application number
PCT/US2010/026067
Other languages
French (fr)
Inventor
Calvin J. Stowe
James M. Mcnicol
Andrew D. Ponder
Original Assignee
Baker Hughes Incorporated
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Baker Hughes Incorporated filed Critical Baker Hughes Incorporated
Priority to GB1215521.4A priority Critical patent/GB2491068B/en
Priority to CA2754452A priority patent/CA2754452C/en
Priority to SG2011061330A priority patent/SG173849A1/en
Priority to AU2010221392A priority patent/AU2010221392B2/en
Priority to BRPI1012310-5A priority patent/BRPI1012310B1/en
Publication of WO2010102015A1 publication Critical patent/WO2010102015A1/en
Priority to NO20111163A priority patent/NO341048B1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00—Cutting or destroying pipes, packers, plugs, or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
    • E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
    • E21B23/042—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion using a single piston or multiple mechanically interconnected pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/63—Frangible connections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/22—Joints and connections with fluid pressure responsive component

Definitions

  • the whipstock is necessarily thinner at the uphole end thereof, it has commonly been a practice in the industry to use a lug at the uphole end of the whipstock to support the shear load with minimal distortion of the whipstock. While this arrangement does tend to work as planned, it also presents a heavy piece of material that is significantly less than a full circle thereby guaranteeing an interrupted cut. Such interrupted cuts are known to damage the mill but this has traditionally been endured due to the lack of any alternative arrangement that will function more favorably.
  • An affixation and release arrangement includes a first component having a fluid pressure chamber; a piston mounted in the first component and exposed to the fluid pressure chamber; a second component affixed to the first component through the piston, the piston responsive to fluid pressure increase within the chamber to unaffix the second component from the first component.
  • a method for releasing a mill and whipstock combination including pressuring a piston within a chamber of the mill; loading a fastener with the piston; overcoming the fastener; releasing the mill from the whipstock.
  • a method for releasing a mill and whipstock combination including pressuring a piston within a chamber of the mill; loading a securement engaged with the piston; overcoming the securement; releasing the mill from the whipstock.
  • Figure 1 is a schematic view of a mill connected to a whipstock with a piston actuated affixation arrangement as taught herein;
  • Figure 2 is a schematic view of the mill and whipstock disconnected by piston actuation;
  • Figure 3 is a schematic view of an alternate embodiment.
  • an affixation and release arrangement 10 is illustrated.
  • the specifically depicted embodiment is an affixation between a first component such as a mill 12 and a second component such as a whipstock 14 but it is to be appreciated that the concept hereof can be extended to other affixations that require separation.
  • the mill 12 defines a chamber 16 therein.
  • a piston 18 is disposed in pressure communication with the chamber 16 such that a change in pressure in the chamber will cause a change in position of the piston 18.
  • the arrangement is configured to cause the piston 18 to move upon a pressure increase in the chamber 16. In the illustrated embodiment, this is affected by configuring the piston 18 with a differential area end to end. Hence upon increased pressure, the piston will move.
  • piston head 20 the portion of the piston 18 that for convenience is referred to here as piston head 20, on the right side of drawing Figure 1 is of a dimension that is larger than that of a portion of the piston 18, referred to herein for convenience as piston tail 22.
  • Piston head 20 and piston tail 22 are accommodated laterally in the mill 12 in bores 24 and 26 that are sized to promote fluid pressure sealability with the piston head 20 and piston tail 22, respectively. Sealing is enhanced by the provision of seals 28 and 30 at each of piston head 20 and piston tail 22. In one embodiment the seals 28 and 30 are o-rings.
  • piston 18 In the condition of piston 18 as described it will be evident to one of ordinary skill in the art that increasing fluid pressure in chamber 16 will cause the piston 18 to move toward the end thereof that is of greater area. In the configuration described above this is toward piston head 20. This also corresponds to the right side of the figure as illustrated.
  • stops 32 and 34 are in one embodiment as illustrated with stop 32 being a snap ring received in a groove 36 and stop 32 being a piece of the piston 18 itself. It will be understood however that these can be reversed or the stop function otherwise accomplished.
  • the construction is related to ease of manufacture of the arrangement 10 since in this configuration the entire piston 18 is insertable through the bore 24 and then the snap ring 32 may be engaged with the groove 36 through chamber 16. Because in the setting of the illustrated embodiment there is no reason that reengagement would be desired, there is no reason to include a biasing member to urge the piston 18 in a direction opposite that of the direction of movement under increased chamber fluid pressure.
  • a biasing member such as a spring would be located to act in a direction opposite the direction of fluid pressure movement such as in compression between the ring 32 and the chamber wall directly to the right of the ring 32 in the Figure, for example, or might be located to act in a same direction as the direction of fluid pressure movement such as between the stop 34 and the chamber wall directly to the left of the stop 34 in the Figure, for example.
  • the whipstock 14, for run in, is secured to the mill 12 by a fastener 38 that is in affixed relationship with the piston 18.
  • the affixed relationship is a threaded or press fit relationship at interface 40.
  • the threaded engagement, press fit engagement or the fastener itself may be overcome solely by the pressure based movement of the piston resulting in release of the mill 12 from the whipstock 14.
  • a parting configuration be provided in the fastener.
  • Such parting configurations may present as a groove in the fastener to reduce tensile capacity thereof, a heat-treated area for the same purpose, or other similar treatments that will reduce strength of the fastener.
  • the reduction is strength of the fastener will be concentrated in a reduction in tensile strength while substantially preserving shear and/or bending strength.
  • the parting configuration is configured to cause parting of the fastener 38 below a surface 42 of the whipstock face to ensure that the fastener will not itself present an impediment to mill 12 advancement.
  • the whipstock 14 With the fastener 38 secured to the piston 18, through an uphole end of whipstock 14, the whipstock 14 is affixed to the mill 12 and remains that way until the arrangement is actuated by increasing fluid pressure in chamber 16. Fluid pressure can be increased in a number of ways such as by pump or by heaters or by energetic compounds (particularly if the chamber 16 is configured as an enclosed space), etc. and the pressure can be locally generated or remote as desired.
  • the arrangement is run into the hole in the condition illustrated in Figure 1 and located by suitable means.
  • the pressure is increased in chamber 16 whereby the piston 18 is moved to the right of the drawing Figure and the fastener 38 parts, which is illustrated in Figure 2.
  • the mill 12 is free to move relative to the whipstock 14. Because there is no remaining bolt or lug to be milled off the whipstock 14, there is far less eccentric cut experienced by the mill when advancing to its primary objective. The life of the mill is therefore extended and the job it can do enhanced since it has not experienced a difficult eccentric cut, as has traditionally been the case.
  • the piston 118 is configured differently.
  • the piston 118 itself extends through the whipstock 14 and is secured at an opposite surface 44 to the face surface 42.
  • a securement 48 is secured in a groove 50 of the piston 118.
  • This ring 48 may be a snap ring, an e clip, etc.
  • the securement 48 may be a roll pin or other similar structure (also considered schematically represented by figure 3).
  • piston 118 upon the application of fluid pressure within chamber 16, piston 118 is urged as it was in the previously described embodiment but instead of parting the fastener as shown in Figure 2, the securement 48 is disengaged from the piston 118. Disengagement may be by shear, deformation, etc.

Abstract

An affixation and release arrangement includes a first component having a fluid pressure chamber; a piston mounted in the first component and exposed to the fluid pressure chamber; a second component affixed to the first component through the piston, the piston responsive to fluid pressure increase within the chamber to unaffix the second component from the first component. Methods are included.

Description

HYDRAULICALLY RELEASED WINDOW MILL
Inventors: STOWE, Calvin J., MCNICOL, James M., PONDER, Andrew D.
BACKGROUND
[0001] In the hydrocarbon industry it is common to run a whipstock and a mill in the same run by hanging the whipstock from the end of the mill string. Generally this is done by using a bolt at an uphole end of the whipstock that runs into the mill to support the weight of the whipstock during run in. Once the whipstock has landed at a selected position and orientation within the borehole, the whipstock is anchored in place and will bear weight. The mill is then separated from the whipstock by set down weight on the bolt that extends from the whipstock to the mill. The bolt is sheared to effect separation. Because the whipstock is necessarily thinner at the uphole end thereof, it has commonly been a practice in the industry to use a lug at the uphole end of the whipstock to support the shear load with minimal distortion of the whipstock. While this arrangement does tend to work as planned, it also presents a heavy piece of material that is significantly less than a full circle thereby guaranteeing an interrupted cut. Such interrupted cuts are known to damage the mill but this has traditionally been endured due to the lack of any alternative arrangement that will function more favorably.
SUMMARY
[0002] An affixation and release arrangement includes a first component having a fluid pressure chamber; a piston mounted in the first component and exposed to the fluid pressure chamber; a second component affixed to the first component through the piston, the piston responsive to fluid pressure increase within the chamber to unaffix the second component from the first component.
[0003] A method for releasing a mill and whipstock combination including pressuring a piston within a chamber of the mill; loading a fastener with the piston; overcoming the fastener; releasing the mill from the whipstock. [0004] A method for releasing a mill and whipstock combination including pressuring a piston within a chamber of the mill; loading a securement engaged with the piston; overcoming the securement; releasing the mill from the whipstock.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Referring now to the drawings wherein like elements are numbered alike in the several figures:
Figure 1 is a schematic view of a mill connected to a whipstock with a piston actuated affixation arrangement as taught herein; Figure 2 is a schematic view of the mill and whipstock disconnected by piston actuation; Figure 3 is a schematic view of an alternate embodiment.
DETAILED DESCRIPTION
[0006] Referring to Figure 1 an affixation and release arrangement 10 is illustrated. The specifically depicted embodiment is an affixation between a first component such as a mill 12 and a second component such as a whipstock 14 but it is to be appreciated that the concept hereof can be extended to other affixations that require separation. Referring directly to the Figures, the mill 12 defines a chamber 16 therein. A piston 18 is disposed in pressure communication with the chamber 16 such that a change in pressure in the chamber will cause a change in position of the piston 18. In one embodiment, the arrangement is configured to cause the piston 18 to move upon a pressure increase in the chamber 16. In the illustrated embodiment, this is affected by configuring the piston 18 with a differential area end to end. Hence upon increased pressure, the piston will move. Addressing specifically the differential area of the piston 18, it is noted that in the illustration, the portion of the piston 18 that for convenience is referred to here as piston head 20, on the right side of drawing Figure 1 is of a dimension that is larger than that of a portion of the piston 18, referred to herein for convenience as piston tail 22. Piston head 20 and piston tail 22 are accommodated laterally in the mill 12 in bores 24 and 26 that are sized to promote fluid pressure sealability with the piston head 20 and piston tail 22, respectively. Sealing is enhanced by the provision of seals 28 and 30 at each of piston head 20 and piston tail 22. In one embodiment the seals 28 and 30 are o-rings. In the condition of piston 18 as described it will be evident to one of ordinary skill in the art that increasing fluid pressure in chamber 16 will cause the piston 18 to move toward the end thereof that is of greater area. In the configuration described above this is toward piston head 20. This also corresponds to the right side of the figure as illustrated.
[0007] In order to prevent the piston from moving too far in either direction the illustrated embodiment is configured with stops 32 and 34. These are in one embodiment as illustrated with stop 32 being a snap ring received in a groove 36 and stop 32 being a piece of the piston 18 itself. It will be understood however that these can be reversed or the stop function otherwise accomplished. In the specifically illustrated embodiment the construction is related to ease of manufacture of the arrangement 10 since in this configuration the entire piston 18 is insertable through the bore 24 and then the snap ring 32 may be engaged with the groove 36 through chamber 16. Because in the setting of the illustrated embodiment there is no reason that reengagement would be desired, there is no reason to include a biasing member to urge the piston 18 in a direction opposite that of the direction of movement under increased chamber fluid pressure. It will be appreciated however, that in other embodiments utilizing the same concept as the embodiment illustrated might benefit from a biasing member and hence in such an arrangement a biasing member such as a spring would be located to act in a direction opposite the direction of fluid pressure movement such as in compression between the ring 32 and the chamber wall directly to the right of the ring 32 in the Figure, for example, or might be located to act in a same direction as the direction of fluid pressure movement such as between the stop 34 and the chamber wall directly to the left of the stop 34 in the Figure, for example.
[0008] The whipstock 14, for run in, is secured to the mill 12 by a fastener 38 that is in affixed relationship with the piston 18. In one embodiment, the affixed relationship is a threaded or press fit relationship at interface 40. In some embodiments the threaded engagement, press fit engagement or the fastener itself may be overcome solely by the pressure based movement of the piston resulting in release of the mill 12 from the whipstock 14. In other embodiments however, it is contemplated that a parting configuration be provided in the fastener. Such parting configurations may present as a groove in the fastener to reduce tensile capacity thereof, a heat-treated area for the same purpose, or other similar treatments that will reduce strength of the fastener. In some embodiments the reduction is strength of the fastener will be concentrated in a reduction in tensile strength while substantially preserving shear and/or bending strength. In each case, the parting configuration is configured to cause parting of the fastener 38 below a surface 42 of the whipstock face to ensure that the fastener will not itself present an impediment to mill 12 advancement.
[0009] With the fastener 38 secured to the piston 18, through an uphole end of whipstock 14, the whipstock 14 is affixed to the mill 12 and remains that way until the arrangement is actuated by increasing fluid pressure in chamber 16. Fluid pressure can be increased in a number of ways such as by pump or by heaters or by energetic compounds (particularly if the chamber 16 is configured as an enclosed space), etc. and the pressure can be locally generated or remote as desired.
[0010] In use, the arrangement is run into the hole in the condition illustrated in Figure 1 and located by suitable means. Once the whipstock is at final destination and orientation the pressure is increased in chamber 16 whereby the piston 18 is moved to the right of the drawing Figure and the fastener 38 parts, which is illustrated in Figure 2. Once the arrangement 10 has achieved the condition illustrated in Figure 2, the mill 12 is free to move relative to the whipstock 14. Because there is no remaining bolt or lug to be milled off the whipstock 14, there is far less eccentric cut experienced by the mill when advancing to its primary objective. The life of the mill is therefore extended and the job it can do enhanced since it has not experienced a difficult eccentric cut, as has traditionally been the case. In an alternate embodiment, referring to figure 3, the piston 118 is configured differently. The piston 118 itself extends through the whipstock 14 and is secured at an opposite surface 44 to the face surface 42. In the specifically illustrated embodiment, a securement 48 is secured in a groove 50 of the piston 118. This ring 48 may be a snap ring, an e clip, etc. Further the securement 48 may be a roll pin or other similar structure (also considered schematically represented by figure 3). In this embodiment, upon the application of fluid pressure within chamber 16, piston 118 is urged as it was in the previously described embodiment but instead of parting the fastener as shown in Figure 2, the securement 48 is disengaged from the piston 118. Disengagement may be by shear, deformation, etc. as long as it is no longer in a position to hold the piston in place and thereby allows the fluid pressure to move the piston 118 in a direction that will disengage the piston itself from the whipstock (to the right in the figure). In this embodiment, there is no component of the securement left in the whipstock and hence no concern that such component might come loose and interfere with a well operation.
[0011] While preferred embodiments have been shown and described, various modifications and substitutions may be made thereto without departing from the spirit and scope of the invention. Accordingly, it is to be understood that the present invention has been described by way of illustration and not limitation.

Claims

1 An affixation and release arrangement comprising: (a) a first component having a fluid pressure chamber; (b) a piston mounted in the first component and exposed to the fluid pressure chamber; (c) a second component affixed to the first component through the piston, the piston responsive to fluid pressure increase within the chamber to unaffix the second component from the first component.
2 An affixation and release arrangement as claimed in claim 1 wherein the second component is affixed to the first component by a fastener.
3 An affixation and release arrangement as claimed in claim 2 wherein the fastener is threaded.
4 An affixation and release arrangement as claimed in claim 2 wherein the fastener is a press fit fastener.
5 An affixation and release arrangement as claimed in claim 2 wherein the fastener includes a parting feature.
6 An affixation and release arrangement as claimed in claim 5 wherein the parting feature facilitates parting under tensile load.
7 An affixation and release arrangement as claimed in claim 5 wherein the parting feature preserves fastener strength in at least one of shear and bending.
8 An affixation and release arrangement as claimed in claim 1 wherein the second component is affixed to the first component by a securement to the piston.
9 An affixation and release arrangement as claimed in claim 8 wherein the securement is a ring.
10 An affixation and release arrangement as claimed in claim 8 wherein the securement is a pin. 11 An affixation and release arrangement as claimed in claim 1 wherein the piston includes a piston head and a piston tail, the piston head having greater area than the piston tail.
12 An affixation and release arrangement as claimed in claim 11 wherein each of the piston head and piston tail include stops.
13 An affixation and release arrangement as claimed in claim 1 wherein the first component is a mill.
14 An affixation and release arrangement as claimed in claim 1 wherein the second component is a whipstock.
15 A method for releasing a mill and whipstock combination comprising; (a) pressuring a piston within a chamber of the mill; (b) loading a fastener with the piston; (c) overcoming the fastener; (d) releasing the mill from the whipstock.
16 A method as claimed in claim 15 wherein the pressuring is by applied pressure from a surface location.
17 A method as claimed in claim 15 wherein the pressuring is local to the mill and whipstock.
18 A method as claimed in claim 15 wherein the loading of the fastener is tensile.
19 A method as claimed in claim 15 wherein the overcoming of the fastener is parting of the fastener.
20 A method for releasing a mill and whipstock combination comprising; (a) pressuring a piston within a chamber of the mill; (b) loading a securement engaged with the piston; (c) overcoming the securement; (d) releasing the mill from the whipstock.
PCT/US2010/026067 2009-03-03 2010-03-03 Hydraulically released window mill WO2010102015A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB1215521.4A GB2491068B (en) 2009-03-03 2010-03-03 An affixation and release arrangement for a whipstock and mill
CA2754452A CA2754452C (en) 2009-03-03 2010-03-03 Hydraulically released window mill
SG2011061330A SG173849A1 (en) 2009-03-03 2010-03-03 Hydraulically released window mill
AU2010221392A AU2010221392B2 (en) 2009-03-03 2010-03-03 Hydraulically released window mill
BRPI1012310-5A BRPI1012310B1 (en) 2009-03-03 2010-03-03 affixing and releasing arrangement for a drill guide and cutter in a wellbore and method for releasing a combination of cutter and drill guide
NO20111163A NO341048B1 (en) 2009-03-03 2011-08-26 Fastening and release device for a guide wedge and a drill bit in a borehole as well as a method for releasing a cutter and guide wedge combination from each other

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/396,986 2009-03-03
US12/396,986 US7878253B2 (en) 2009-03-03 2009-03-03 Hydraulically released window mill

Publications (1)

Publication Number Publication Date
WO2010102015A1 true WO2010102015A1 (en) 2010-09-10

Family

ID=42677205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/026067 WO2010102015A1 (en) 2009-03-03 2010-03-03 Hydraulically released window mill

Country Status (9)

Country Link
US (1) US7878253B2 (en)
AU (1) AU2010221392B2 (en)
BR (1) BRPI1012310B1 (en)
CA (1) CA2754452C (en)
GB (1) GB2491068B (en)
MY (1) MY165251A (en)
NO (1) NO341048B1 (en)
SG (1) SG173849A1 (en)
WO (1) WO2010102015A1 (en)

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GB2491068A (en) 2012-11-21
NO341048B1 (en) 2017-08-14
SG173849A1 (en) 2011-09-29
BRPI1012310A2 (en) 2016-03-15
AU2010221392A1 (en) 2011-08-18
GB2491068B (en) 2014-03-05
US20100224372A1 (en) 2010-09-09
US7878253B2 (en) 2011-02-01
MY165251A (en) 2018-03-14
CA2754452A1 (en) 2010-09-10
CA2754452C (en) 2013-11-26
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NO20111163A1 (en) 2011-09-09
BRPI1012310B1 (en) 2019-11-05

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