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
  • E21B7/00—Special methods or apparatus for drilling
  • E21B7/04—Directional drilling
  • E21B7/06—Deflecting the direction of boreholes
  • E21B7/061—Deflecting the direction of boreholes the tool shaft advancing relative to a guide, e.g. a curved tube or a whipstock
• • 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
  • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
  • E21B17/18—Pipes provided with plural fluid passages
• • 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
  • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
  • E21B19/24—Guiding or centralising devices for drilling rods or pipes
• • 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
  • E21B23/03—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for setting the tools into, or removing the tools from, laterally offset landing nipples or pockets
• • 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
  • E21B23/08—Introducing or running tools by fluid pressure, e.g. through-the-flow-line tool systems
  • E21B23/12—Tool diverters
• • 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
  • E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
  • E21B41/0035—Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches

Definitions

• FIGS. 4A and 4B depict exemplary first and second bullnose assemblies, respectively, according to one or more embodiments
• FIG. 15 illustrates another exemplary bullnose assembly, according to one or more embodiments
• any use of any form of the terms “connect,” “engage,” “couple,” “attach,” or any other term describing an interaction between elements is not meant to limit the interaction to direct interaction between the elements and may also include indirect interaction between the elements described.
• the terms “including” and “comprising” are used in an open- ended fashion, and thus should be interpreted to mean “including, but not limited to”. Unless otherwise indicated, as used throughout this document, "or” does not require mutual exclusivity.
• the deflector assembly 100 may be generally arranged within a parent or main bore 104 at or otherwise uphole from a junction 106 where a lateral bore 108 extends from the main bore 104.
• the lateral bore 108 may extend into a lateral wellbore (not shown) drilled at an angle away from the parent or main bore 104.
• a single biasing member 120 may be used with each of the first and second plates 1 14a,b.
• multiple biasing members 120 may be associated with each of the first and second plates 114a,b, and the positioning and spacing of the biasing members 120 may vary.
• the biasing members 1 14a,b are spaced approximately equally around a perimeter of the first and second plates 1 14a,b.
• one or more biasing members 120 may be positioned only in certain areas of the first and second plates 1 14a,b.
• each of the first and second plates 1 14a,b is movable between a first position and a second position. While the plates 114a,b may be capable of some longitudinal movement within the tubular string 102, movement of the plates 114a,b primarily occurs in a direction perpendicular to a longitudinal axis of the tubular string 102 such that the movement tends to position the plates 114a,b closer together or further apart. In the first position, the first and second plates 114a,b are biased toward one another to achieve the distance 115 between at least some part of the plates. The second position of the first and second plates 1 14a,b is such that the plates 1 14a,b in this second position are spaced further apart from one another, i.e., a distance greater than the distance 1 15.
• the lower deflector 1 10b may define a ramped surface 121 (removed for clarity in FIG. 1A but illustrated in FIG. IB), a first conduit 122a and a second conduit 122b, where both the first and second conduits 122a,b extend longitudinally through the lower deflector 1 10b.
• an end of the ramped surface 121 begins beneath the first and second plates 114a,b and extends in an inclined fashion toward the first conduit 122a and the second conduit 122b.
• the second conduit 122b extends into and fluidly communicates with the lateral bore 108 while the first conduit 122a extends downhole and fluidly communicates with a lower or downhole portion of the parent or main bore 104 past the junction 106.
• FIG. 3B the first and second plates 1 14a,b of the upper deflector 110a are shown in relation to first and second conduits 122a,b.
• first and second plates 1 14a,b in the first position are separated by the distance 115.
• the distance 115 as depicted is smaller than the first width 302a and the second width 302b.
• a bullnose assembly having a width small enough to pass into the first conduit 122a as described may still be too large to pass between the first and second plates 1 14a,b.
• the first and second plates 1 14a,b are provided to properly position the bullnose assembly as the bullnose assembly advances toward the lower deflector 110b.
• the plates 1 14a,b assist in eliminating the requirement that the direction of gravitational forces be coordinated with orientation of the lower deflector 110b in the tubular string 102. More specifically, as depicted, the upper ramped surfaces 1 16a,b of the first and second plates 1 14a,b may assist in deflecting the bullnose assembly such that the bullnose assembly may be aligned with the first conduit 122a of the lower deflector 110b.
• the bullnose tip 406 of the first bullnose assembly 402a exhibits a first width 408a and the bullnose tip 406 of the second bullnose assembly 402b exhibits a second width 408b.
• the first width 408a is less than the second width 408b.
• the cross-sectional shapes of the bullnose tips 406 are circular and thus the widths 408a,b may be diameters.
• the first width 408a may be smaller than the first width 302a of the first conduit 122a
• the second width 408b may be larger than the first width 302a but smaller than the second width 302b of the second conduit 122b.
• the bullnose tip 406 of the first bullnose assembly 402a exhibits a first length 410a and the bullnose tip 406 of the second bullnose assembly 402b exhibits a second length 410b.
• the first and second lengths 410a,b may be the same or substantially the same. In other embodiments, the first and second lengths 410a,b may be different.
• FIGS. 6A-6D With continued reference to the preceding figures, illustrated are cross-sectional views of the deflector assembly 100 as used in exemplary operation, according to one or more embodiments. More particularly, FIGS. 6A-6D illustrate progressive views of the second bullnose assembly 402b interacting with and otherwise being deflected by the deflector assembly 100.
• the bullnose tip 406 slidingly engages ramped surface 121 of lower deflector 1 10 and is urged toward second conduit 122b and urges apart the first and second plates 114a,b. Since the second width 408b is less than the second width 302b of the second conduit 122b, the second bullnose assembly 402b is capable of entering and does enter the second conduit 122b (FIG. 6D), and then continues into lateral bore 108.
• the deflector assembly 700 may include a first or upper deflector 710a and a second or lower deflector 710b.
• the upper and lower deflectors 710a,b may be secured within the tubular string 702 using one or more mechanical fasteners (not shown) and the like.
• the upper and lower deflectors 710a,b may be welded into place within the tubular string 702, without departing from the scope of the disclosure.
• the upper and lower deflectors 710a,b may form an integral part of the tubular string 702, such as being machined out of bar stock and threaded into the tubular string 702.
• the upper deflector 710a may be arranged closer to the surface (not shown) than the lower deflector 710b, and the lower deflector 710b may be generally arranged at or adjacent the junction 706 (see FIG. 8).
• the upper deflector 710a may define or otherwise provide a ramped surface 712 facing toward the uphole direction within the main bore 704.
• the upper deflector 710a may further define a first channel 714a and a second channel 714b, where both the first and second channels 714a,b extend longitudinally through the upper deflector 710a.
• the lower deflector 710b may define a first conduit 716a and a second conduit 716b, where both the first and second conduits 716a,b extend longitudinally through the lower deflector 710b.
• the second conduit 716b extends into and otherwise communicates with the lateral bore 708 while the first conduit 716a extends downhole and otherwise communicates with a lower or downhole portion of the parent or main bore 704 past the junction 706.
• the deflector assembly 700 may be arranged in a multilateral wellbore system where the lateral bore 708 is only one of several lateral bores that are accessible from the main bore 704 via a corresponding number of deflector assemblies 700 arranged at multiple junctions.
• the guide spring 2114 may be mechanically, adhesively, integrally, or otherwise attached to a portion of the tubular string 102. As depicted, the guide spring 2114 is received on each end by a guide slot 2120 formed in a wall of the tubular string 102. In some embodiments, the guide spring 21 14 is permitted to slide within the guide slot 2120 such that compression of the guide spring 21 14 by a bullnose assembly may result in the guide spring 21 14 flattening and the guide slot 2120 receiving more of the guide spring 21 14.
• Example 9 The deflector assembly of example 8 further comprising a biasing member to bias the at least one plate toward the secondary member.
• a second upper deflector arranged within a main bore of a wellbore, the upper deflector having first and second plates spaced apart by a first distance, at least one of the first and second plates having a first ramped surface;
• a lower deflector arranged within the main bore, the lower deflector defining a first conduit and a second conduit, one of the first and second conduits in communication with a lower portion of the main bore and another of the first and second conduits in communication with a lateral bore;
• Example 22 The deflector assembly of example 21, wherein the upper and lower deflectors are arranged within a tubular string that extends from a surface location.
• Example 27 The deflector assembly of example 25, wherein, when the first diameter of the bullnose tip is greater than the diameter of the first conduit, the bullnose assembly is configured to be directed into the second conduit and the lateral bore.
• Example 30 A deflector assembly as shown and described herein.

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• Engineering & Computer Science (AREA)
• Geology (AREA)
• Mining & Mineral Resources (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Fluid Mechanics (AREA)
• Environmental & Geological Engineering (AREA)
• Physics & Mathematics (AREA)
• Geochemistry & Mineralogy (AREA)
• Mechanical Engineering (AREA)
• Earth Drilling (AREA)
• Operation Control Of Excavators (AREA)
• Compressor (AREA)
• Nozzles (AREA)
• Geophysics And Detection Of Objects (AREA)
• Other Air-Conditioning Systems (AREA)
• Portable Nailing Machines And Staplers (AREA)
• Vibration Dampers (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

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• 2013
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• 2016
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