WO2016176259A1 - Ensembles broyeurs à sortie de tubage comprenant un manchon à lame remplaçable - Google Patents

Ensembles broyeurs à sortie de tubage comprenant un manchon à lame remplaçable Download PDF

Info

Publication number
WO2016176259A1
WO2016176259A1 PCT/US2016/029449 US2016029449W WO2016176259A1 WO 2016176259 A1 WO2016176259 A1 WO 2016176259A1 US 2016029449 W US2016029449 W US 2016029449W WO 2016176259 A1 WO2016176259 A1 WO 2016176259A1
Authority
WO
WIPO (PCT)
Prior art keywords
mounting portion
shaft body
blade sleeve
bearing
mill assembly
Prior art date
Application number
PCT/US2016/029449
Other languages
English (en)
Inventor
Tejas J. GHEGADMAL
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 AU2016255698A priority Critical patent/AU2016255698A1/en
Priority to GB1719345.9A priority patent/GB2554023A/en
Priority to CA2983793A priority patent/CA2983793A1/fr
Priority to SG11201708559VA priority patent/SG11201708559VA/en
Publication of WO2016176259A1 publication Critical patent/WO2016176259A1/fr
Priority to NO20171777A priority patent/NO20171777A1/en

Links

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
    • 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
    • E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
    • 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
    • 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
    • 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
    • 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

Definitions

  • the invention relates generally to the design and construction of downhole milling tools used to perform casing exits and other metal cutting operations.
  • the invention provides improved designs for the construction of downhole mills.
  • the invention provides methods of assembling a mill.
  • An exemplary casing exit mill assembly is described in which a central shaft body is provided with a mounting portion that is shaped to prevent rotation of a blade sleeve mounted thereupon.
  • the mounting portion presents a plurality of arcuately curved contact surfaces. Adjacent contact surfaces on the mounting portion adjoin each other at angled corners. There are at least three curved contact surfaces. According to preferred
  • each of the contact surfaces there are between three and twelve contact surfaces.
  • the cross-sectional shape of each of the contact surfaces is defined as an arcuate segment from a circle having a radius which is greater than the radius of the contact surface upon the shaft body mounting portion.
  • a bearing and a blade sleeve surround the mounting portion.
  • the bearing could be a separate component from the shaft and blade sleeve.
  • the bearing is a coating formed upon either the mounting portion of the shaft body or upon the inner surface of the central opening of the blade sleeve.
  • the blade sleeve is provided with a central opening that is shaped and sized to be complementary to the mounting portion of the shaft body.
  • the components are secured together using a press fit or interference fit.
  • the modular construction of the mill assembly permits the blade sleeve to be easily replaced when worn or damaged.
  • the blade sleeve could be replaced by a blade sleeve having a different diameter or design of cutting structures.
  • the shaft body of the mill assembly includes a radially enlarged portion which is located proximate the blade sleeve.
  • a removable protection blade sleeve radially surrounds the radially enlarged portion.
  • the protection blade sleeve is preferably press fit and features a tapered interface with the radially enlarged portion.
  • Figure 1 is a side, cross-sectional view of an exemplary casing exit mill assembly constructed in accordance with the present invention.
  • Figure 2 is an enlarged side, cross-sectional view of portions of the mill of Figure 1.
  • Figure 3 is an axial cross-section of the mill assembly taken along lines 3-3 in Figure 2.
  • Figure 4 is an axial cross-section of the mill assembly of Figures 1-3, now being subjected to torsional force.
  • Figure 5 is a schematic view of the mounting portion of the mill assembly shown in Figs. 1-4 in comparison to a larger circle.
  • Figure 6 is a side view of the shaft body of an alternative mill assembly wherein the mounting portion of the shaft body has six contact faces.
  • Figure 7 is a side view of an alternative mill assembly which incorporates the shaft body shown in Figure 6.
  • Figure 8 is an axial cross-section taken along lines 8-8 in Figure 6.
  • Figure 9 is an axial cross-section taken along lines 9-9 in Figure 7.
  • Figure 10 is a further axial cross-section of a mounting portion with six contact faces illustrating exemplary geometric features of the mounting portion.
  • Figure 11 is a side, cross-sectional view of another enlarged portion of the shaft body.
  • FIG. 1-2 depicts an exemplary casing exit mill assembly 10 constructed in accordance with the present invention.
  • the mill assembly 10 includes a central shaft body 12 which defines an axial fluid passage 14 along its length. Threaded connections 16 are provided at each axial end of the shaft body 12 to permit the mill assembly to be incorporated into a downhole work string.
  • the shaft body 12 is preferably cylindrical in shape along its length except where otherwise indicated.
  • a mounting portion 18 of the shaft body 12 has a shaped outer radial surface upon which a bearing 20 and a blade sleeve 22 are mounted. The outer radial surface of the mounting portion 18 is shaped to preclude rotation of the bearing 20 and blade sleeve 22 with respect to the shaft body 12.
  • the mounting portion 18 presents three arcuately curved convex contact faces 24 which adjoin one another at corners 26.
  • the mounting portion 18 is designed to ensure that the blade sleeve 22 and bearing 20 do not rotate upon the shaft body 12. It should be appreciated with reference to Figures 3 and 4 that the mounting portion 18 is generally nearly round but still provides corners 26 that will prevent rotation of the surrounding bearing 20 and blade sleeve 22 upon the shaft body 12. It is noted that, in axial cross-section (i.e., Figures 3-4) the contact faces 24 of the mounting portion 18 preferably each form an arcuate segment of a circle that has a radius greater than the radius 25 of the mounting portion 18 at its widest point.
  • Figure 5 illustrates a larger circle 27 of which a contact face 24 forms an arcuate segment.
  • the larger circle 27 has a radius 29 that exceeds the radius 25 of the mounting portion 18 at its widest point.
  • the radius 29 is at least twice as large as the radius 25.
  • the shaft body 12 also includes a radially enlarged portion 31 which is located proximate, but a spaced distance from, the mounting portion 18.
  • a protection blade sleeve 33 radially surrounds the radially enlarged portion 31 and presents a hardened protruding portion for engaging a surrounding tubular during casing window cutting.
  • the radially enlarged portion 31 and the protection blade sleeve 33 are preferably press fit.
  • the mounting portion 18 is axially tapered to allow for ease of assembly.
  • the mounting portion 18 is tapered at an angle "r".
  • the angle of taper "r" is about 2 degrees, as measured from the central axis of the shaft body 12. This taper facilitates a press fit securing of the bearing 20 onto the mounting portion 18.
  • the blade sleeve 22 presents a plurality of cutting blades 28 which project radially outwardly from the sleeve 22.
  • the cutting blades 28 are formed of or brazed with carbide cutters or other hardened cutting structures.
  • the bearing 20 is preferably formed of a material that is softer than the material making up the shaft body 12 and the blade sleeve 22.
  • the bearing 20 is formed of copper, manganese or bronze, or alloys which include these materials.
  • the bearing 20 is formed of a viscoelastic material which provides an effective damper for torsional vibrations and shocks.
  • the bearing 20 may be in the form of a separate component that is disposed between the shaft body 12 and the blade sleeve 22.
  • the bearing 20 may be in the form of a coating that is applied to either or both of the shaft body 12 and/or the blade sleeve 22.
  • Figures 3 and 4 help illustrate the resistance of the blade sleeve 22 to rotation in response to torsional loading.
  • Figure 3 illustrates the mill assembly 10 having no torsional loading applied.
  • a torsional force is being applied to the blade sleeve 22, as indicated by arrow 30.
  • the mill assembly 10 can be constructed by first sliding the bearing 20 onto the shaft body 12 and over the mounting portion 18. Thereafter, the blade sleeve 22 is slid onto the shaft body 12 to overlie the bearing 20 so that the bearing 20 is located radially between the shaft body 12 and the blade sleeve 22. A press fit, or interference fit, affixes the three components together.
  • the modular construction of the mill assembly 10 permits users to easily replace a worn blade sleeve 22 or to replace the blade sleeve 22 with a blade sleeve having a larger or smaller outer diameter or having a different type or design of cutting blades or structures.
  • the mill assembly 10 is constructed as described above and is then incorporated into a work string. Thereafter, the work string is disposed into a wellbore. The mill assembly 10 is run in to a desired location within the wellbore and rotated, in a manner known in the art, so that the blade sleeve 22 of the mill assembly 10 mills or cuts away desired material.
  • FIGS 6-10 illustrate features of an alternative embodiment for a mill assembly 50 constructed in accordance with the present invention. Except where otherwise described, the mill assembly 50 is constructed and operates in the same manner as the mill assembly 10 described previously.
  • the shaft body 12' of the mill assembly 50 includes a tapered mounting portion 18'.
  • the mounting portion 18' has six contact faces 24' rather than three. The contact faces 24' adjoin each other at corners 26'.
  • a bearing 20' may be disposed between the mounting portion 18' and the blade sleeve 22'.
  • Figures 8 and 10 help to illustrate geometric features associated with the contact faces 24' and the mounting portion 18' of the mill assembly 50.
  • a true circle 52 is depicted in Figures 8 and 10 superimposed around the outer perimeter of the mounting portion 18'.
  • Figure 10 shows that a gap 54 is defined between the contact faces 24' and the true circle 52.
  • the gap 54 results from the fact that the central portions 55 of the contact faces 24' are defined as arcuate segments of a circle having a radius 56 which is larger than the radius 58 of the mounting portion 18' at its widest point. In other words, the contact faces 24' have a larger radius of curvature than circle 52.
  • Figure 10 also illustrates an exemplary hexagonal outer surface 60 superimposed on the mounting portion 18' and drawn with its vertices at the corners 26' . It can be seen that the contact faces 24' extend radially outwardly beyond the sides 62 of the hexagonal outer surface 60.
  • the contact faces 24' are further shaped to present contoured transition surface portions 64 that are located proximate the corners 26' of the mounting portion 18'.
  • the transition surface portions 64 have a radius of curvature 66 smaller than either the true circle 52 or the central portions 55 of the contact faces 24'.
  • mounting portion 18' is preferably axially tapered, as illustrated by Figure 6, in the same manner as described for mounting portion 18. The tapering will aid in assembly and repair of the mill assembly 50.
  • the inventor has determined that the use of arcuately curved contact faces in a mounting portion along with angled corners which adjoin the contact faces is an
  • shaft body/blade sleeve interfaces constructed in accordance with the present invention provide increased contact area between the contact faces 24, 24' and the surrounding blade sleeve 22, 22', thereby increasing the ability of torque forces to be transmitted between the components and supplementing force transmission between the corners 26, 26' and the surrounding blade sleeve 22, 22'.
  • contact faces, such as contact faces 24' have outer radial portions with different radii of curvature.
  • each contact face 24' has a radius of curvature 56 that is greater than the radius of curvature 58 of the mounting portion 18', as measured from its widest point.
  • Lateral portions 64 of the contact face 24' have a radius of curvature 66 that is smaller than the radius of curvature 58 for the mounting portion 18' and the radius of curvature 56 of the central portion 55 of the contact face 24'.
  • the mounting portions 18, 18' have at least three contact faces or the type described previously. In preferred embodiments, there are from three to twelve contact faces. In particularly preferred embodiments, there are from three to six contact faces.
  • Figure 11 illustrates the radially enlarged portion 31 and the protection blade sleeve 33 in greater detail.
  • the radially enlarged portion 31 preferably presents an outer radial surface that is shaped with contact faces and corners similar to those described previously with respect to the mounting portions 18, 18'.
  • the largest diameter on this axially tapered enlarged portion 31 is preferred to be equal to or smaller than the smallest diameter of the mounting portion 18, to aid the axial passage of the smallest inner diameter of the blade sleeve 22.
  • the radially enlarged portion 31 is axially tapered in the same manner as the mounting portions 18, 18'.
  • a bearing 68 is disposed between the radially enlarged portion 31 and the protection blade sleeve 33.
  • the protection blade sleeve 33 will provide a hardened contact point for the mill assembly 10 or 50 to assist in casing window exit operations.

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)
  • Milling Processes (AREA)
  • Crushing And Grinding (AREA)

Abstract

Un ensemble broyeur comportant un corps d'arbre de broyeur, un palier amovible et un manchon de lame amovible est divulgué. Le corps d'arbre présente une partie de montage possédant une pluralité de faces de contact incurvées pour la transmission de forces de rotation.
PCT/US2016/029449 2015-04-28 2016-04-27 Ensembles broyeurs à sortie de tubage comprenant un manchon à lame remplaçable WO2016176259A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2016255698A AU2016255698A1 (en) 2015-04-28 2016-04-27 Casing exit mill assemblies with replaceable blade sleeve
GB1719345.9A GB2554023A (en) 2015-04-28 2016-04-27 Casing exit mill assemblies with replaceable blade sleeve
CA2983793A CA2983793A1 (fr) 2015-04-28 2016-04-27 Ensembles broyeurs a sortie de tubage comprenant un manchon a lame remplacable
SG11201708559VA SG11201708559VA (en) 2015-04-28 2016-04-27 Casing exit mill assemblies with replaceable blade sleeve
NO20171777A NO20171777A1 (en) 2015-04-28 2017-11-09 Casing exit mill assemblies with replaceable blade sleeve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/698,320 US20160319617A1 (en) 2015-04-28 2015-04-28 Casing Exit Mill Assemblies with Replaceable Blade Sleeve
US14/698,320 2015-04-28

Publications (1)

Publication Number Publication Date
WO2016176259A1 true WO2016176259A1 (fr) 2016-11-03

Family

ID=57198819

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2016/029449 WO2016176259A1 (fr) 2015-04-28 2016-04-27 Ensembles broyeurs à sortie de tubage comprenant un manchon à lame remplaçable

Country Status (7)

Country Link
US (1) US20160319617A1 (fr)
AU (1) AU2016255698A1 (fr)
CA (1) CA2983793A1 (fr)
GB (1) GB2554023A (fr)
NO (1) NO20171777A1 (fr)
SG (1) SG11201708559VA (fr)
WO (1) WO2016176259A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016355058B2 (en) * 2015-11-18 2020-10-22 Baker Hughes Holdings, LLC Watermelon mill with replaceable cutting structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5201353A (en) * 1991-07-25 1993-04-13 Weill Theodore C Reconfigurable debarker head
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
US5785583A (en) * 1997-03-10 1998-07-28 Williams Patent Crusher & Pulverizer Company Material cutting rotor assembly
US20090250266A1 (en) * 2008-04-03 2009-10-08 Dimitroff Ted R Sectional back reamer for horizontal directional drilling
US20130292183A1 (en) * 2011-01-07 2013-11-07 Statoil Petroleum As Centralizer

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1805087A (en) * 1927-03-07 1931-05-12 Kenneth A Wright Well tool
US3320004A (en) * 1964-06-19 1967-05-16 Drilco Oil Tool Inc Earth boring apparatus
JPS5421900B2 (fr) * 1973-02-15 1979-08-02
US3993147A (en) * 1976-01-19 1976-11-23 Dresser Industries, Inc. Taper lock removable stem for raise bit
US4974688A (en) * 1989-07-11 1990-12-04 Public Service Company Of Indiana, Inc. Steerable earth boring device
US5303688A (en) * 1992-04-03 1994-04-19 Chiuminatta Edward R Mounting arbor for saw cutting blades
US7900720B2 (en) * 2006-01-18 2011-03-08 Schlumberger Technology Corporation Downhole drive shaft connection
US8302709B2 (en) * 2009-06-22 2012-11-06 Sandvik Intellectual Property Ab Downhole tool leg retention methods and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5201353A (en) * 1991-07-25 1993-04-13 Weill Theodore C Reconfigurable debarker head
US5676321A (en) * 1995-04-03 1997-10-14 Fellowes Mfg. Co. Cutting disk
US5785583A (en) * 1997-03-10 1998-07-28 Williams Patent Crusher & Pulverizer Company Material cutting rotor assembly
US20090250266A1 (en) * 2008-04-03 2009-10-08 Dimitroff Ted R Sectional back reamer for horizontal directional drilling
US20130292183A1 (en) * 2011-01-07 2013-11-07 Statoil Petroleum As Centralizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016355058B2 (en) * 2015-11-18 2020-10-22 Baker Hughes Holdings, LLC Watermelon mill with replaceable cutting structure

Also Published As

Publication number Publication date
NO20171777A1 (en) 2017-11-09
AU2016255698A1 (en) 2017-11-30
GB201719345D0 (en) 2018-01-03
SG11201708559VA (en) 2017-11-29
US20160319617A1 (en) 2016-11-03
CA2983793A1 (fr) 2016-11-03
GB2554023A (en) 2018-03-21

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