WO1995023274A1 - Dispositif et procede de recuperation d'un sifflet deviateur - Google Patents

Dispositif et procede de recuperation d'un sifflet deviateur Download PDF

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Publication number
WO1995023274A1
WO1995023274A1 PCT/US1994/001939 US9401939W WO9523274A1 WO 1995023274 A1 WO1995023274 A1 WO 1995023274A1 US 9401939 W US9401939 W US 9401939W WO 9523274 A1 WO9523274 A1 WO 9523274A1
Authority
WO
WIPO (PCT)
Prior art keywords
whipstock
anchor
well bore
latch
string
Prior art date
Application number
PCT/US1994/001939
Other languages
English (en)
Inventor
Britt Oliver Braddick
Original Assignee
Tiw Corporation
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 Tiw Corporation filed Critical Tiw Corporation
Priority to GB9500248A priority Critical patent/GB2291447B/en
Priority to PCT/US1994/001939 priority patent/WO1995023274A1/fr
Priority to CA002137936A priority patent/CA2137936C/fr
Publication of WO1995023274A1 publication Critical patent/WO1995023274A1/fr

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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
    • E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells

Definitions

  • whipstocks in drilling to direct or deviate a drill bit or cutter at an angle from a cased well bore. It is generally customary in most instances to initially set a cement plug, a packer and a whipstock at the desired elevation in a well tubular member such as a casing.
  • the orienting of the whipstock is then accomplished in a well known manner and generally requires a multiple trip operation into and out of the cased well bore.
  • a retrievable whipstock arrangement includes a whipstock with a tapered face thereon, which whipstock can be releasably and non rotatably positioned in an anchor secured with a cased well bore to position the whipstock face in the cased well bore in a desired direction.
  • a latch mandrel forming part of a shaft depending from the whipstock supports a latch that is releasably engagable with the anchor secured in the cased well bore , whereby the whipstock may be retrieved from the cased well bore.
  • Cooperating surfaces on the orientation sleeve portion of the shaft and on the whipstock enable the whipstock to be rotated and locked in a desired rotated position on the shaft at the earth's surface which positions and maintains the whipstock face in a desired direction when surfaces on the orientation sleeve and the anchor secured in the cased well bore are engaged.
  • the anchor includes means to secure it with the casing and maintain it secured with the casing.
  • the whipstock is not lowered on a drill string into the cased well bore, it may be lowered on a well string and releasably, but non rotatably, latched to the anchor.
  • the well string and whipstock are provided with cooperating latch arrangements to enable the whipstock to be lowered and engaged with the anchor by the well string and the well string then released from the whipstock without changing the direction in which the whipstock faces in the cased well bore.
  • the well string may be reingaged with the whipstock for retrieving it from the cased well bore which leaves the cased well bore open for access.
  • An object of the present invention is to provide a method and apparatus for releasably and non rotatably latch a whipstock to an anchor secured in a cased well bore.
  • Another object is to provide a method and apparatus to latch a whipstock with a well string to lower and releasably position the whipstock in an anchor secured in a cased well bore to face in a desired direction in the cased well bore , which well string may be then disengaged from the whipstock after the whipstock is releasably positioned in the anchor while maintaining the whipstock releasably, and non rotatably positioned in the anchor to face in the desired direction.
  • One object of the present invention is to provide an arrangement and method for lowering a retrievable whipstock into an anchor secured in a well bore casing for drilling a lateral well bore and thereafter retrieving the whipstock. This leaves the cased well bore from which the lateral well bore is drilled accessible for whatever purpose may be desired or necessary such as, by way of example only, for receiving a flow conduit below the anchor to conduct fluids from such cased well bore .
  • Another object of the present invention is to provide an arrangement and method for lowering a retrievable whipstock into an anchor in a cased well bore casing for drilling a lateral well bore, retrieving the drill string and then retrieving the whipstock.
  • Still a further object of the present invention is to provide a method and apparatus for drilling a desired number of lateral well bores from the same cased well bore. Another object is to provide an arrangement and method for lowering a retrievable whipstock into an anchor in a cased well bore for stepwise drilling a plurality of lateral well bores in any desired direction and elevation from the cased well bore and leaving the cased well bore open from which the lateral well bores are drilled.
  • Another object is to provide a method and apparatus for releasably securing a whipstock with an anchor in a cased well bore and for retrieving the whipstock from the anchor.
  • Yet a further object is to provide a method and apparatus for securing a retrievable whipstock face in any desired rotated relationship relative to an anchor secured in a cased well bore.
  • Still a further object is to provide a method and apparatus for lowering a whipstock into a cased well bore on a well string to secure the whipstock with an anchor and the well string then released and retrieved from the cased well bore in a manner to inhibit unthreading the joints forming the well string.
  • Still a further object is to provide a method and apparatus for lowering a whipstock into a cased well bore on a well string to secure the whipstock with an anchor and the well string then released and retrieved from the cased well bore, and thereafter reengaging the well string with the whipstock to retrieve it.
  • a further object of the invention is to secure an anchor in a cased well bore that is configured for receiving a whipstock that supports a latch for releasably securing the whipstock in the anchor in a desired direction for drilling a lateral well bore from the cased well bore.
  • a further object of the invention is to provide a whipstock that supports a latch for releasably securing the whipstock in an anchor for drilling lateral well bores from a cased well bore.
  • the whipstock includes a surface for maintaining the latch engaged with the anchor.
  • Cooperating surfaces on the anchor and and whipstock face the whipstock in a desired direction while the whipstock is in use to drill the lateral well bore.
  • Still another object of the invention is to enhance production of oil and gas from a cased well bore by drilling lateral well bores from the cased well bore.
  • a further object of the invention is to provide an arrangement to enable a whipstock face to be positioned in any desired direction at the earth's surface and then lowered into a cased well bore for drilling lateral well bores in desired directions from the cased well bore and the whipstock then retrieved.
  • Fig 1 is a sectional schematic view showing one form of an anchor, with one form of latch supported on a setting tool for releasably connecting the setting tool and anchor;
  • Fig. 2 is an enlarged partial sectional view of Fig. 1 showing the anchor form of Fig. 1 releasing the setting tool from the anchor form of Fig.
  • Fig. 3 is a sectional view showing the anchor form of Fig. 1 secured in the well bore tubular member;
  • Fig. 3A is a sectional schematic view of a survey mechanism, or instrument, for determining the orientation, or direction of a whipstock latch surface in the anchor for enabling the whipstock to be rotated and locked on the shaft at the earth's surface in a predetermined position to face in a desired direction when it is positioned and secured in the anchor;
  • Figs. 4 and 5 are sectional views, partly in elevation illustrating a whipstock secured on a drill string and being lowered into the anchor form of Fig. 1 and releasably secured therewith by latch means on a shaft connected to the whipstock and depending therefrom.
  • Fig. 6 is an enlarged sectional view on the line 6-6 of Fig. 4 which shows in greater detail one form of the cooperating surfaces on the whipstock and shaft to secure the whipstock in a desired rotated position on a shaft to position the face of the whipstock in a desired direction when the whipstock is secured with the anchor;
  • Fig. 7 schematically illustrates an arrangement for releasing a whipstock from an anchor and also an arrangement for latching with a whipstock to position it in or retrieve it from a cased well bore;
  • Figs. 8 and 9 are enlarged partial sectional views showing one form of a cooperating latch arrangement on a well string and a cooperating latch arrangement on a whipstock for releasably engaging a well string with a whipstock to position the whipstock in, and retrieve it from, a well bore tubular member and for releasing the well string from the whipstock ;
  • Figs. 10 and 11 are are partial sectional views, similar to Figs. 8 and 9, and showing another form of a cooperating latch arrangement for a well string and whipstock;
  • Fig 12 is an enlarged sectional view on the line 12-12 of Fig. 7 illustrating further details of the forms of latch arrangements of Figs. 8-11 for the well string and the whipstock;
  • Fig. 13 is a sectional view of a packer anchor and with a seal between the anchor and whipstock;
  • Fig. 14 is a sectional view, partly in elevation, of a cased well bore illustrating an anchor with the whipstock secured therewith to position the whipstock face in a desired manner for receiving a drill string to drill the lateral well bore shown;
  • Fig. 15 is a view similar to Fig. 14 and showing a plurality of lateral well bores drilled from the cased well bore in desired directions and at selected elevations from the cased well bore;
  • Fig. 16 is a sectional view illustrating one possible arrangement of production equipment positioned in a cased well bore for communicating separately with the cased well bore and the lateral well bore after the whipstock has been retrieved from the cased well bore.
  • FIGs. 1-3 of the drawings wherein an arrangement is shown for securing an anchor, represented generally at A, in a well bore tubular member, such as a casing C in cased well bore WB.
  • the anchor A includes a body B of any suitable configuration.
  • the body B is illustrated as being tubular and is formed of lower tubular element la and an upper tubular element lb threadedly connected with tubular element la which is connected with lower cone 81.
  • the body B is preferably tubular and includes a longitudinal bore 2 therethrough.
  • An anchor surface on the anchor is provided and may be of any suitable configuration and is shown as being in the form of an internal groove or annular recess 3 in the bore 2 of the body.
  • Slip means 4 are supported on the anchor in any suitable manner and are shown in Figs. 1, 3 and 5 as secured by frangible means, such as shear pins 5 adjacent, or on tapered surfaces 6 and 6a, respectively, on upper and lower spaced tubular portions 6b and cage 81 on the tubular body of the anchor .
  • the shear pins 5 extend through the tapered surfaces 6 and 6a and into the slip means 4 of the anchor to maintain the tapered surfaces in spaced relation as the tool is lowered into the well bore and until the setting tool, represented generally by T, is actuated to effect relative movement between the tapered surfaces and the slip means to shear pins 5 for moving the slip means to engage the tubular member and secure the anchor with the tubular member.
  • body B in the embodiment shown terminates in an inclined surface 7, and where the body B is tubular with a bore 2, which is the preferred embodiment, the surface 7 is an annular edge surface.
  • a whipstock latch surface extends in the tubular body B from the edge 7.
  • the whipstock latch surface is a slot as shown at 8 that extends from the lowermost portion of the tapered surface as shown in the drawings, but it may assume other configurations, such as, by way of example only, a longitudinal recess on the internal wall of the body or other form as desired.
  • a setting arrangement or setting tool T of any suitable type may be employed to lower and secure the anchor in a tubular member such as cased well bore or the like.
  • a wireline setting tool or hydraulically actuated setting tool may be employed.
  • the setting tool includes a shaft, rod, or adapter 9 on which releasable means such as a latch referred to generally at 10 of any suitable form may be supported.
  • the latch 10 includes an annular body 11 with frangible means such as shear pins 12 adjacent the upper end thereof for releasably securing the latch 10 on the shaft 9 as shown in Fig.l.
  • the shear pins 12 extend through the circumferentially spaced, longitudinally extending slots 13 of body 11 and into shaft 9 as shown in Figs. 1 and 2.
  • the slots terminate adjacent , but spaced from the upper end and bottom end of body 11 as shown.
  • Extending from the bottom end of latch body 11 are circumferentially spaced, longitudinally extending members 14 which have external enlargements, or latch surfaces thereon represented at 15 for positioning within the recess, or anchor surface 3.
  • the arrangement including the setting tool, latch 10 and anchor A are assembled at the earth's surface in a manner well known in the art to connect them together for lowering into the cased well bore as shown in Fig. 1 with the shear pins 12 adjacent the upper end of slots 13 and latch surfaces 15 in the anchor surface 3.
  • a wireline or well string is used to lower the arrangement into the cased well bore.
  • the setting tool includes a first surface 23 on shaft or adapter 9, shown in the form of a radially extending portion on shaft 9, which is positioned adjacent the enlargements 15 when they are positioned in the recess 3. This prevents the latch 10 from prematurely releasing from the tubular Body B until the setting tool is actuated.
  • Actuation of the setting tool and setting the slips moves shaft or adapter 9 up.
  • Increased force applied to adapter 9 through actuation of the setting tool T after setting of the anchor A in the casing C of the well bore breaks shear pin 12 as the adapter moves upward relative to latch 10.
  • Continued upward movement of the adapter 9 relative to latch 10 causes the bottom surface 24 of the latch 10 to engage with the ledge 25 on the shaft or adapter 9 to remove the latch 10 from the secured anchor A and retrieve the latch 10 with the setting tool to the earth's surface.
  • FIG. 5 illustrates further details of the anchor A not seen in Fig.l.
  • a lock means referred to generally at L is provided to maintain the anchor secured with the tubular with the tubular member C.
  • the lock L may assume any desired form and in the form shown includes a ratchet surface 17 extending longitudinally on the outer surface of tubular body B of the anchor.
  • the tubular portion 6b has an internal tapered thread 19 in annular spaced relation to the ratchet thread 17 on tubular body B.
  • a split ratchet ring 20 is between tubular portion 6b and the tubular body B.
  • the split or segmented ratchet ring 20 has a ratchet thread 21 on its inner surface and a tapered thread 22 on its outer surface.
  • the ratchet surfaces lock the tubular portion 6b and cage 81 with tubular body B so the slip means 4 is locked in engagement with the tubular member C in the well bore when the setting tool is actuated in a manner well known in the art.
  • the setting arrangement including the setting tool T with sleeve S thereon and anchor A are assembled as shown in Fig. 1 at the earth's surface.
  • Sleeve S, as shown in Fig. 1 abuts the upper end 6c of the tubular portion 6b on which tapered surface 6 is formed.
  • relative movement is effected between setting sleeve S and tubular body B in a manner well known in the art to set the slip means 4 and to cause the surfaces of the lock L to cooperate to accommodate relative movement and then lock the tubular portion 6b, split ring 20 and the body B in engaged relation to maintain the slips engaged with the tubular member C in the well bore.
  • An application of force causes setting of the slips 4 in a manner well known in the art, after which the pins 12 are sheared upon upward movement of the setting tool.
  • the setting tool is then removed from the anchor A and ledge , or second surface, 25 on the setting string or tool, engages with the bottom 24 of the latch to retrieve it from the anchor and well bore along with the setting tool as illustrated in Fig. 2 of the drawing.
  • Fig. 13 illustrates another form of the anchor A which includes the packer P on the tubular body above the slip means.
  • the packer P on the tubular body above the slip means.
  • the lock L above the packer P is similar to that shown below the packer in Fig. 5 in that it employs a tubular portion 6f above the packer, but it has no tapered surface. Other parts are similar with like numerals representing like parts of the lock L below the packer.
  • a seal 80 is provided on the latch mandrel 30 between the latch mandrel 30 and the body B. The member 6d closes off the upper end of tubular portion 6b.
  • Figs. 4 and 5 show one form of the arrangement of the present invention wherein a mill M is releasably connected adjacent the lower end of a drill string DS.
  • a whipstock 27 is connected with the drill string beneath the mill by frangible means such as shear pin 26a which connects the drill string with the whipstock at face 26.
  • An extension 28 depends from the lower end of the whipstock 27 and includes coupling 29 connected therewith by any suitable means such as threads as shown.
  • a shaft is connected to the whipstock 27.
  • the shaft in the embodiment illustrated in the drawings is formed by the orientation sleeve 31 which receives therein and partially surrounds latch mandrel 30 as shown in the drawings.
  • the latch mandrel 30 and orientation sleeve 31 are shown as each being connected to the extension 28 by coupling 29 of the whipstock and may be considered as part of the whipstock.
  • the extension 28 of the whipstock is threaded and shouldered with coupling 29 which limits the make - up of the threaded connection between extension 28 and coupling 29.
  • the orientation sleeve 31 of the shaft and the whipstock are provided with cooperating surfaces for locking and maintaining the whipstock face in any desired rotated position on the shaft to enable a lateral well bore to be drilled in a desired direction from the cased well bore. This relationship is maintained when the whipstock is non rotatably positioned in the anchor A in the cased well bore.
  • the cooperating surfaces on the whipstock and the shaft which initially determine and maintain this relationship may assume any desired configuration, and one form is illustrated in Fig. 6 of the drawings.
  • the cooperating surfaces comprise internal splines, referred to generally at 32, or internal keys 32a and keyways 32b on the orientation sleeve 31 of the shaft adjacent its upper end, which engage with external splines, referred to generally at 33, or external keyways 33a and keys 33b, formed on the coupling 29 of the whipstock.
  • the keys 32a engage in keyways 33a and the keyways 32b receive keys 33b.
  • any suitable number of splines or keys and keyways may be provided on the whipstock and the orientation sleeve of the shaft , as desired.
  • the splines are represented as immediately adjacent in Fig. 6, but they may be circumferentially spaced if desired.
  • a lock sleeve 34 as shown in Fig. 4 is provided with threads to engage with the coupling 29 as shown and an annular shoulder 34a on lock sleeve 34 abuts an annular shoulder 31a on the orientation sleeve 31 of the shaft as shown to lock the whipstock face 26 in any desired rotated position on the orientation sleeve 31 of the shaft as shown.
  • the cooperating surfaces on the whipstock illustrated as the lug 31d and the slot 8 in the anchor prevent relative rotation between the whipstock and the anchor secured in the cased well bore.
  • the cooperating surfaces may assume any desired configuration.
  • the lower end of tubular body B of the anchor A is connected to lower cone 81 by suitable means such as threads as shown in the drawings.
  • the lower tapered or conical surface 6a is formed on lower cone 81 and the cage 81' includes circumferentially spaced slots 83 in which are positioned cap screws 82 that are secured on the lower cone 81.
  • the slip means comprise upper and lower slip means 4 that are positioned on the upper and lower conical surfaces 6 and 6a respectively.
  • the slips extend through circumferentially spaced windows 84 and 85 of cage 81' which engage and grip the inner surface of the casing C upon setting of the anchor A by the setting tool, by way of example only, the surface on the orientation sleeve 31 is shown as a projecting lug 31d on the orientation sleeve of the shaft which engages in the whipstock latch surface, shown in the form of slot 8, when the whipstock and shaft are positioned in and releasably latched with the anchor A, and when so engaged, no relative rotation between the whipstock face 26 and the casing occurs.
  • the whipstock arrangement of the present invention precludes relative rotation between the whipstock face and casing C when the whipstock 27 is positioned and releasably latched with the anchor A in the casing C.
  • a latch 35 is supported on the whipstock in any suitable manner and as shown in the form of the invention illustrated in the drawings, the latch
  • latch mandrel 30 of the shaft is supported on the whipstock by latch mandrel 30 of the shaft.
  • the latch mandrel 30 is secured by threads 29a to the coupling 29 that is connected with the whipstock.
  • the latch 35 is similar to latch 10, but different reference numerals are applied to describe it and distinguish it from latch 10.
  • the latch referred to generally at 35 includes a body 36 releasably secured to the latch mandrel 30 by shear pins 35a which extend through longitudinal slots 37 therein and into the latch mandrel as shown.
  • the shear pins 35a are stronger than the shear pins 26a which secure the mill to the drill string and thus the mill can be released without affecting the connection of the whipstock and latch mandrel 30 of the shaft with tubular body B of the anchor A.
  • Circumferentially spaced members 38 depend from body 36 and the members 38 have enlargements 39 adjacent their lower ends as shown and described with respect to the latch 10 that releasably secures the whipstock and drill string with the anchor A to secure the whipstock in the desired direction to enable a lateral well bore to be drilled from the cased well bore.
  • the latch mandrel of the shaft is connected to and may be considered as part of the whipstock.
  • the surface 27d on the latch mandrel 30 seats on shoulder 51 of the body B when the lug 3 Id is seated in the slot 8 of the body B, as shown in Figs. 4 and 5.
  • the first, or annular surface 27a, on the latch mandrel 30 of the shaft is adjacent the enlargements 39 in recess 3 and since the latch mandrel 30 is seated on shoulder 51 it cannot move down. Should up movement occur, the first, or annular surface 27a moves to a position adjacent and internal relative to enlargements 39 to prevent inward flexing of members 38, thus preventing enlargements 39 from moving out of recess 3.
  • the whipstock latch surface in the form of the invention illustrated, is the longitudinal slot 8 in the anchor A.
  • Lug 3 Id on the orienting sleeve 31 of the shaft engages the inclined surface 7 of the tubular body B when the 0 whipstock arrangement is lowered into the anchor A and the lug 3 Id on the orientation sleeve 31 of the shaft is guided into the slot 8 to position the shaft with the anchor.
  • the orientation of the whipstock latch 5 surface in the form of slot 8 in the anchor A is determined, in a manner well known in the art, so that the whipstock face may be rotated, or positioned, and secured on the orientation sleeve shaft 31 of the shaft at the earth's surface to face in the desired direction when engaged in the anchor A to enable a lateral well bore to be drilled from the cased well D bore in which the whipstock is positioned.
  • Fig. 3A schematically represents a mechanism, or instrument, well known in the art for lowering into a cased well bore on a wireline as shown to conduct and record a survey that determines the orientation, or direction, of a surface relative to a predetermined direction, such as 5 magnetic North, in a well bore.
  • a tool is schematically represented 42 with a centralizer represented at 42a.
  • the tool 42 includes a pin or lug 43 that engages in slot 8 and enables the tool to determine the orientation of the pin 43 which is also the orientation of slot 8 of the anchor.
  • the apparatus and method of obtaining the survey is well known to those skilled in the art, and 0 no detailed explanation is deemed necessary.
  • any person skilled in the art can then disconnect orientating sleeve 31 of the shaft from the whipstock 27 and rotate it to position the face of the whipstock as desired.
  • the whipstock is reconnected to the orienting shaft 31 by the splines , and the whipstock 5 lowered into the anchor so lug 3 Id is in slot 8, the whipstock face 26 will be secured in the cased well bore in the direction in which it is desired to drill the lateral well bore .
  • the foregoing arrangement and method enables the whipstock to be adjusted at the earth's surface to face in any desired direction in the cased well bore to enable a lateral well bore to be drilled in a well known manner.
  • the mill is released from the whipstock by manipulating the whipstock either up or down to shear pin 26a.
  • the first surface 27a prevents the enlargements from withdrawing out of surface in the tubular body B of the anchor.
  • the drill string is then manipulated to move the drill string and mill down to cut a window in the casing C and to perform the desired drilling operations to drill a lateral well bore, such as illustrated at 47 from the cased well bore WB as shown in Fig. 14.
  • the drill string is then retrieved from the cased and lateral well bores to the earth's surface.
  • the drill string may incorporate suitable drilling tools to drill the lateral well bore 47 and in some instances the drill string and mill are retrieved from the cased well bore after the mill has cut the window in the casing C and drill tools added as desired to drill the lateral well bore and the drill string lowered back into the cased well bore to drill the lateral well bore.
  • the whipstock may then be retrieved to the earth's surface, as will be described. Removal of the whipstock leaves the cased well bore open and unrestricted for access to position suitable production equipment in the cased well bore, as may be desired.
  • Fig. 16 illustrates one suitable arrangement showing a seal bore packer 48.
  • a suitable multi-string packer 49 may be set in a well known manner above the anchor A as shown in Fig. 16.
  • Production tubing 48' may then be connected there through and through the anchor A to engage in seal bore packer 48 to conduct flow from cased well bore WB to the earth's surface separately from lateral bore 47.
  • a separate packer conduit conducts flow from the lateral well bore.
  • production from the lateral well bore 47 may be brought to the earth's surface via the annular space between the production tubing and the casing C of the cased well bore.
  • Another alternative is to omit the multi-string packer 49 and employ the packer anchor form of Fig. 13. It then provides a seal bore packer and the production tubing 48' may be sealably engaged within the bore of the tubular body B of the anchor. The seal 80 and the packer P seal off the well bore below the packer anchor for flow through the production string to the earth's surface.
  • the whipstock is retrieved after the drill string is removed from drilling a lateral well bore, and the whipstock and orientation sleeve of the shaft disengaged to enable the cooperating surfaces on the whipstock and orientation sleeve of the shaft to be released from each other.
  • lock sleeve 34 is removed.
  • the orientation sleeve of the shaft and whipstock can then be manipulated to disengage their respective cooperating surfaces, which in the embodiment shown are keys and keyways.
  • the orientation of the surface, or slot 8 in the anchor A is known from previous drilling, or the survey may be reconducted. With the information from the previous survey or a new survey, relative rotation between the whipstock and the orientation sleeve 31 of the shaft is effected and then the keys and keyways on the whipstock and orientation sleeve reconnected so that the whipstock will face in the desired direction when secured in the anchor to enable the lateral well bore to be drilled in such desired direction.
  • the whipstock is then relowered into the well bore and reingaged in the anchor for drilling the next lateral well bore. This procedure may be repeated to drill whatever number of lateral well bores as desired and in whatever selected directions. If the elevation of the additional lateral well bores drilled from the cased well bore is to vary, then the length of the extension 28 on the whipstock may be varied accordingly to space the whipstock longitudinally from the anchor A and any other laterals as desired such as lateral 47 as shown in Fig. 15 to drill the additional laterals .
  • Fig. 15 illustrates two lateral well bores drilled from the cased well bore WB. Like numerals are applied to corresponding components as previously described.
  • Fig. 7 the shaft formed by the latch mandrel 30 and orienting sleeve 31 is schematically illustrated as secured with and depending from the whipstock 27 and a well string 53 is latched with the whipstock.
  • the well string 53 may be employed to retrieve the whipstock and in some instances it may be desirable to lower the whipstock on a well string 53 to secure the whipstock in the anchor, release the well string from the whipstock, retrieve the well string then lower a drill string into the cased well bore to drill the lateral well bore, retrieve the drill string and then retrieve the whipstock.
  • Cooperating latch arrangements one form of which is shown in Figs. 8-11 inclusive, is referred to generally at 77 on the well string 53, ⁇ md referred to generally at 78 on the whipstock 27 .
  • the cooperating latch arrangements 77 and 78 enable the whipstock and a well string to be releasably engaged for lowering the whipstock into the anchor by a well string, to enable the well string to be manipulated to be released therefrom after the whipstock is latched in the anchor and retrieved and to enable the well string to be lowered and reingaged with the whipstock to retrieve it.
  • the cooperating latch arrangements on the well string and the whipstock also enables the whipstock to be engaged and latched with the well string by longitudinal movement. It also enables the well string to be disengaged from the whipstock by right hand rotation of the well string which avoids left hand rotation and the attendant possibility of unthreading the well string in the well bore.
  • the cooperating latch arrangement on the whipstock comprises an opening 56 in the whipstock which extends down from the face 26 of the whipstock with threads 57 formed thereon as shown in Figs. 8, 9, 10, and 11.
  • the cooperating latch arrangement on the well string 53 includes an annular counter bore 58 extending from the upper end 59 of a circumferential slot 60.
  • the counter bore 58 forms or provides an outer annular circular portion 61 with a lower end 62 that terminates in spaced relation to the lower end, shown in dotted line at 63, of the circumferential slot on the well string 53.
  • a latch represented at 65 has an annular body 66 that slidably fits within the counter bore 58.
  • Circumferentially spaced members 67 extend from the body toward the lower end 63 of slot 60.
  • the members 67 have an enlargement 67a adjacent their lower ends with threads 68 on the enlargements, which threads are configured to engage with threads 57 on the whipstock as will be described.
  • the well string includes longitudinal keys 69 thereon as shown in
  • Fig. 12 which extend longitudinally between members 67 adjacent the enlargements 67a, as shown in dotted line and solid line, to prevent relative rotation between the well string 53 and the members 67. This enables latch 65 on the well string and the well string to be rotated simultaneously to disengage the well string from the whipstock when desired.
  • the back surface 70 of the enlargements 67a on members 67 is shown as being tapered in the Figs. 8 and 9 form to conform with the taper 71 on enlarged portion 72 on the well string form of Figs. 8 and 9.
  • the back surface 70 of the enlargements 67a on members 67 is shown in an alternate form in Figs. 10 and 11 as a generally flat surface configured to conform with the enlarged, generally flat surface 74 on the well string form shown in Figs. 10 ⁇ md 11.
  • the latch arrangement thereon is connected with the latch arrangement on the whipstock at the earth's surface and the well string and whipstock ⁇ tre lowered into the well bore connected together as shown in Fig. 7 to secure the shaft in the anchor A, in a manner as previously described herein.
  • the well string When it is desired to release from the whipstock, the well string is rotated to the right and moved upwardly enough to assure that the end 59 of the counterbore 58 does not abut the top 86 of the latch body 66 and prevent upward movement of the latch as it unthreads from the whipstock .
  • the well string is not moved to contact the back surfaces on the enlargements 67a as such contact would prevent proper release between the cooperating latch arrangements on the well string and the whipstock.
  • the well string 53 When the well string 53 is lowered to engage with the whipstock, it is pushed longitudinally into the opening 56 on the whipstock, which in the embodiment shown extends down from the face 26 of the whipstock, and end 62 of circular portion 61 contacts the top thread in the whipstock opening, as seen in Figs. 9 and 11.
  • the top 86 of the latch contacts the upper end 59 of the slot 60, and this pushes the threads 68 of the latch into the threads 57 in the whipstock. Since the latch is moved up in the slot 60 as shown in Figs. 9 and 11, there is clearance for the circumferentially spaced members 67 to flex to the left as viewed in the drawings to enable them to flex and engage with the threads 57 on the whipstock as shown in Figs. 8 and 10 to then be held in such position by engagement of the enlarged surface 72 and 74 in Figs. 8 and 10 respectively surface of the well string when it is pulled upwardly as shown in Figs. 8 and 10.. Sufficient pull is exerted to shear the frangible members 35a shown in Fig. 5 to release the latch from the anchor. Second surface 27b on the latch mandrel 30 of the shaft engages the bottom 52 of the latch to retrieve the latch with the whipstock from the well bore.
  • a centralizer 95 may be positioned on the well string 53 to assist in guiding the well string 53 to latch a whipstock in the anchor and to guide the well string into latching relation with the whipstock anchored in the well bore for retrieval thereof.

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  • 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)
  • Earth Drilling (AREA)

Abstract

Un élément d'ancrage (A) est fixé à l'intérieur d'un forage de puits tubé par un dispositif de fixation (T) muni d'un loquet (10) qui fixe cet élément (A) de façon réversible. Le sifflet de déviation (27) comporte des surfaces (33) en prise avec les surfaces d'un arbre (32) à la surface du sol pour orienter le sifflet de déviation de manière à le placer dans une direction voulue. Le sifflet de déviation (27) est ensuite descendu dans un forage de puits tubé et fixé de manière réversible à l'élément d'ancrage (A) par un loquet (35) qui vient s'engager dans un évidement (3) de l'élément d'ancrage et est fixé de façon à prévenir toute rotation par une surface (31d) engagée dans la surface de fixation (8) du sifflet de déviation ménagée dans l'élément d'ancrage (A). Un forage de puits latéral peut alors être foré depuis le forage de puits tubé dans la direction et à la cote voulues. Le sifflet de déviation (27) peut être relié à un train de tiges de forage (DS) à des fins de descente à l'intérieur de l'élément d'ancrage (A) placé dans le forage. Si on le souhaite, un tubage de puits ordinaire (53) muni d'un dispositif de fixation (77) coopère avec le dispositif de fixation (78) du sifflet de déviation (27) pour retirer le sifflet de l'élément d'ancrage (A) ou pour placer le sifflet dans la position voulue dans celui-ci.
PCT/US1994/001939 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur WO1995023274A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9500248A GB2291447B (en) 1994-02-23 1994-02-23 Retrievable whipstock arrangement and method
PCT/US1994/001939 WO1995023274A1 (fr) 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur
CA002137936A CA2137936C (fr) 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1994/001939 WO1995023274A1 (fr) 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur
CA002137936A CA2137936C (fr) 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur

Publications (1)

Publication Number Publication Date
WO1995023274A1 true WO1995023274A1 (fr) 1995-08-31

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Application Number Title Priority Date Filing Date
PCT/US1994/001939 WO1995023274A1 (fr) 1994-02-23 1994-02-23 Dispositif et procede de recuperation d'un sifflet deviateur

Country Status (3)

Country Link
CA (1) CA2137936C (fr)
GB (1) GB2291447B (fr)
WO (1) WO1995023274A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309472A (en) * 1996-01-29 1997-07-30 Baker Hughes Inc Packer setting and whipstock orienting method and apparatus
EP0846837A2 (fr) * 1996-12-05 1998-06-10 Halliburton Energy Services, Inc. Dispositif souterrain pour le fraisage d'un tubage de puits
WO1999039077A1 (fr) * 1998-01-30 1999-08-05 Dresser Industries, Inc. Procede et dispositif d'insertion et retrait en une seule operation d'un outil et dispositif auxiliaire
US5947201A (en) * 1996-02-06 1999-09-07 Baker Hughes Incorporated One-trip window-milling method
WO2000008294A1 (fr) * 1998-08-03 2000-02-17 Smith International, Inc. Sifflet de déviation
EP0935049A3 (fr) * 1998-02-05 2001-09-12 Halliburton Energy Services, Inc. Dispositif et méthode pour puits de forage
GB2567225A (en) * 2017-10-06 2019-04-10 Priority Drilling Ltd Directional drilling

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CA2308944C (fr) * 1999-05-19 2008-04-01 Smith International, Inc. Appareil et methode de reference pour puits
US6543536B2 (en) 1999-05-19 2003-04-08 Smith International, Inc. Well reference apparatus and method
US6499537B1 (en) 1999-05-19 2002-12-31 Smith International, Inc. Well reference apparatus and method

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US2669429A (en) * 1951-11-06 1954-02-16 John A Zublin Apparatus for drilling deviating bores utilizing a plurality of curved tubular drillguide sections
US3011568A (en) * 1960-03-24 1961-12-05 Irve C Grimm Apparatus for drilling holes deviating laterally from a straight bore
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US5193620A (en) * 1991-08-05 1993-03-16 Tiw Corporation Whipstock setting method and apparatus

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US2669429A (en) * 1951-11-06 1954-02-16 John A Zublin Apparatus for drilling deviating bores utilizing a plurality of curved tubular drillguide sections
US3115935A (en) * 1960-03-18 1963-12-31 Jefferson M Hooton Well device
US3011568A (en) * 1960-03-24 1961-12-05 Irve C Grimm Apparatus for drilling holes deviating laterally from a straight bore
US4307780A (en) * 1980-07-21 1981-12-29 Baker International Corporation Angular whipstock alignment means
US5154231A (en) * 1990-09-19 1992-10-13 Masx Energy Services Group, Inc. Whipstock assembly with hydraulically set anchor
US5193620A (en) * 1991-08-05 1993-03-16 Tiw Corporation Whipstock setting method and apparatus

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Title
-TIW, "TIW SS-WS Whipstock Packer with Anchor", Brochure, 1987, pages 30, 45, 46. *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5740864A (en) * 1996-01-29 1998-04-21 Baker Hughes Incorporated One-trip packer setting and whipstock-orienting method and apparatus
GB2309472A (en) * 1996-01-29 1997-07-30 Baker Hughes Inc Packer setting and whipstock orienting method and apparatus
GB2309472B (en) * 1996-01-29 1999-11-03 Baker Hughes Inc Packer setting and whipstock-orienting method and apparatus
US5947201A (en) * 1996-02-06 1999-09-07 Baker Hughes Incorporated One-trip window-milling method
EP0846837A3 (fr) * 1996-12-05 2001-10-17 Halliburton Energy Services, Inc. Dispositif souterrain pour le fraisage d'un tubage de puits
EP0846837A2 (fr) * 1996-12-05 1998-06-10 Halliburton Energy Services, Inc. Dispositif souterrain pour le fraisage d'un tubage de puits
US6308782B1 (en) 1998-01-30 2001-10-30 Halliburton Energy Services, Inc Method and apparatus for one-trip insertion and retrieval of a tool and auxiliary device
WO1999039077A1 (fr) * 1998-01-30 1999-08-05 Dresser Industries, Inc. Procede et dispositif d'insertion et retrait en une seule operation d'un outil et dispositif auxiliaire
EP0935049A3 (fr) * 1998-02-05 2001-09-12 Halliburton Energy Services, Inc. Dispositif et méthode pour puits de forage
WO2000008294A1 (fr) * 1998-08-03 2000-02-17 Smith International, Inc. Sifflet de déviation
GB2340519B (en) * 1998-08-03 2002-06-12 Smith International Deflector tool
US6702014B1 (en) 1998-08-03 2004-03-09 Smith International, Inc. Deflector tool for deflecting items through a window in borehole casing
GB2567225A (en) * 2017-10-06 2019-04-10 Priority Drilling Ltd Directional drilling
GB2567225B (en) * 2017-10-06 2020-02-26 Priority Drilling Ltd Directional drilling
US11788358B2 (en) 2017-10-06 2023-10-17 Priority Drilling Ltd Directional drilling

Also Published As

Publication number Publication date
CA2137936C (fr) 1999-05-11
GB2291447B (en) 1998-02-18
CA2137936A1 (fr) 1995-08-24
GB2291447A (en) 1996-01-24
GB9500248D0 (en) 1995-11-15

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