EP0434924A1 - Apparatus for drilling an offset or side-tracked well, especially from a cased well - Google Patents

Apparatus for drilling an offset or side-tracked well, especially from a cased well Download PDF

Info

Publication number
EP0434924A1
EP0434924A1 EP90120537A EP90120537A EP0434924A1 EP 0434924 A1 EP0434924 A1 EP 0434924A1 EP 90120537 A EP90120537 A EP 90120537A EP 90120537 A EP90120537 A EP 90120537A EP 0434924 A1 EP0434924 A1 EP 0434924A1
Authority
EP
European Patent Office
Prior art keywords
cutting tool
deflection
starting
wedge unit
borehole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90120537A
Other languages
German (de)
French (fr)
Other versions
EP0434924B1 (en
Inventor
Rainer Dr.-Ing. Jürgens
Dietmar Krehl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Baker Hughes Holdings LLC
Original Assignee
Baker Hughes Inc
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 Inc filed Critical Baker Hughes Inc
Publication of EP0434924A1 publication Critical patent/EP0434924A1/en
Application granted granted Critical
Publication of EP0434924B1 publication Critical patent/EP0434924B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E21B29/06—Cutting windows, e.g. directional window cutters for whipstock operations
    • 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

Definitions

  • the invention relates to a device for drilling a secondary or deflection bore of a particularly cased borehole in underground rock or earth formations according to the preamble of claim 1.
  • a packer When creating a conventional borehole deflection from z. B. the pipe wall of a cased borehole, a packer is first placed in the borehole, a deflecting wedge unit having a wedge surface is oriented in a certain direction and fixed to the packer via an anchor device.
  • the deflection wedge unit is conventionally fastened to a start cutting tool via a shear pin connection and introduced into the borehole with the drill string having the start cutting tool.
  • the conventionally used starting tool has a front cone oriented towards the deflection wedge unit, which cone forms a deflection guide which interacts with the deflection wedge piece at the upper end of the deflection wedge unit.
  • the start cutting tool is located after the initiation of the deflection process in an area of the borehole where its front or front cutting surfaces no longer come to rest on the front edge of the deflection wedge unit .
  • a guide element that cannot be cut such as a cone part, cannot hinder the progress of the tool.
  • the start cutting tool is located after the start cutting or milling process with its end face in the casing and is fully cutable without fear of destroying the deflection wedge unit. It is therefore not necessary to pull the strand and replace the starting cutting tool when a drilling progress corresponding to the length of the deflection guide has been reached. The associated time savings are considerable.
  • the design of the device according to the invention thus creates the prerequisite for arranging further milling tools after the leading cutting tool in order to cut out and expand the window with a drilling set, Carry out clearing work and make the deflection hole until you can continue working with a conventional drilling set.
  • the deflection wedge unit preferably comprises a deflection ramp engaging behind the starting cutting tool or the leading tool in the starting position and interacting with the deflection guide.
  • the deflection guide of the starting cutting tool is formed by a downstream, tapered tool holder area.
  • This can then be followed directly by other cutting tools, e.g. B. a milling tool with a larger cutting diameter than the cutting tool, with which the cut borehole window in the casing area is to be expanded.
  • Such a milling tool can be followed by a further broaching tool with a larger cutting diameter than the first downstream tool.
  • there is the possibility of adding further broaching tools if the broaching capacity should not be sufficient in the individual case.
  • the device according to the invention illustrated in FIGS. 1 to 3 comprises a packer 1 and a deflecting wedge unit 2 with a deflecting wedge surface 3.
  • the packer 1 and the deflecting wedge unit 2 are designed as a complete structural unit and therefore together in one borehole to be determined.
  • the deflection wedge unit 2 or the deflection wedge surface 3 should have a deflection or deflection angle of approximately 2 ° to 3 ° in the illustrated exemplary embodiment.
  • the deflecting wedge surface 3 consists of a tempered high-performance steel, so that a milling tool can be guided along this while simultaneously cutting out a casing tube window without having to fear destruction of the wedge surface.
  • the deflection wedge unit 2 is connected directly to the packer 1 and has a hydraulic passage 4 in order to place the packer 1 together with the deflection wedge unit 2 in the borehole. Otherwise, the deflecting wedge unit 2 also comprises a hydraulic line on the rear side, which is not visible in the illustration according to FIG.
  • the hose 5 is to be connected to the start cutting tool numbered 6 and thus creates a direct connection to the flushing supply, but at the same time also closes the flushing openings of the starting cutting tool 6 that are not visible in the drawing.
  • the deflection guide 9 of the leading cutting tool 6 is arranged in the form of a tapering tool holder area in the tool holder area under the downstream milling cutting tool 7, which is therefore also arranged downstream of the cutting tool 6 in the direction of drilling progress.
  • the deflecting wedge unit 2 in turn comprises the start cutting tool at its upper end facing the drill rods of the drill string, generally numbered 10 6 engaging deflection ramp 11. Not visible in detail is fixed in the region of the deflection ramp 11 of the starting cutting tool 6 via a shear pin connection for setting and positioning the device on the deflection wedge unit 2 and thus also on the packer 1.
  • the deflection ramp 11 in turn has a deflection wedge surface 13 against which the lower region of the deflection guide 9 rests at the start of a deflection or window cutting process. 2, the deflection guide 9 projects beyond the wedge surface 13 of the deflection ramp 11, so that the starting cutting tool 6 can be deflected away from the longitudinal axis of the borehole via the deflection guide 9 and the deflection wedge surface 13 of the deflection ramp 11 without first to come into contact with the deflecting wedge surface 3 of the deflecting wedge unit 2.
  • the milling cutting tool 7 immediately downstream of the starting cutting tool 6 in the direction of the drilling progress has an outer cutting diameter which is larger than the outer diameter of the starting cutting tool 6, but does not yet correspond to the diameter of the deflection bore to be created.
  • a cut window is to be expanded with the milling cutter tool 7.
  • Above the milling cutter 14 of the first subordinate cutting tool 7, the latter is so flexible via a constriction 15 that it can be deflected to a certain extent, so that material loads due to bending moments that occur during deflection can be kept low.
  • the tool 7 is followed by a further tool 7.2, which is also equipped with a milling cutter 16.
  • the tool 7.2 also includes a constriction 17 and is therefore also flexible in order to reduce the material loads that occur.
  • the milling cutter 16 of the tool 7.2 has an outer cutting diameter which corresponds essentially to the diameter of the finished deflection bore to be produced and thus forms a broaching tool. Additional cutting tools or milling cutters can be connected between the broaching tool 7.2 and the strand 10, if in the respective individual case the existing clearing capacity should not be sufficient.
  • the packer / deflecting wedge complete unit together with the tools 6, 7, 7.2 are to be mounted on the derrick, wherein the deflecting wedge unit 2 and milling cutters 6, 7, 7.2 are to be aligned .
  • Packer 1, deflection wedge unit 2 and milling tools 6, 7, 7.2 are then lowered into the borehole. Once the desired depth has been reached, the deflection wedge unit 2 is to be aligned using special tools and the packer 1 is set by means of overpressure via the hydraulic passages 4 of the deflection wedge unit 2.
  • the connecting bolts between the starting cutting tool 6 and the deflection unit 2 are then to be sheared off, after which the device is ready for the deflection or window cutting process to be carried out.
  • the cutting tool unit is put into operation, with the starting cutting tool 6 first cutting a window in the borehole wall when the deflection guide 9 moves downward along the deflection wedge surface 13 of the deflection ramp 11 before it comes into contact with the deflection wedge surface 3 of the deflection wedge unit 2 as part of a further downward movement ( 3A). This ensures that the deflecting wedge unit 2 is not damaged in its upper region via the starting cutting tool 6, but that the starting cutting tool 6 can be used for the window cutting process.
  • the downstream cutting tool 7 first mills away the deflection ramp 11 in some areas, but in doing so also expands the window in the borehole wall cut by the starting cutting tool 6 (FIG. 3B).
  • the cutting tool 6, which now rests on the deflecting wedge surface 3 of the deflecting wedge unit 2 takes over the guidance and can safely slide along the deflecting wedge surface 3, which is made of tempered high-performance steel, without causing damage.
  • the start cutting tool After further drilling progress, the start cutting tool has 6 the casing wall directly below its center, which is noticeable by a reduced torque with decreasing drilling progress.
  • the load is therefore expediently initially increased further in order to bring the starting cutting tool 6 out of this position.
  • the window area is to be expanded and cleared with the milling cutter 16 or the further downstream cutting tool 7.2, the starting cutting tool 6 drilling further into the formation until it is ensured that that the milling tool 7.2 has completely passed through the drilling wall area.
  • the drill string can be exchanged for a standard drill set.

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)
  • Earth Drilling (AREA)

Abstract

The invention relates to an apparatus for drilling an offset or side-tracked well, especially from a cased well in underground rock or earth formations, having a deflector-wedge unit 2 which can be fixed in the well by means of a packer 1 as well as having a starting cutting tool 6, which can be fastened on a drill string 10 and is for cutting a well window, assigned to which is a deflecting guide 9, which is in effective connection with the deflector-wedge unit 2 and is for initiating a deflecting operation. In order in particular to be able to produce a well window with a reduced amount of work and consequently in less time, the deflecting guide 9 is arranged after the starting cutting tool 6 in the direction in which drilling progresses (Fig. 2).

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Bohren einer Neben- oder Ablenkbohrung eines inbesondere verrohrten Bohrlochs in unterirdischen Gesteins- oder Erdformationen gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for drilling a secondary or deflection bore of a particularly cased borehole in underground rock or earth formations according to the preamble of claim 1.

Beim Erstellen einer Bohrlochablenkung konventioneller Art aus z. B. der Rohrwandung eines verrohrten Bohrloches wird in dem Bohrloch zunächst ein Packer gesetzt, eine eine Keilfläche aufweisende Ablenkkeileinheit in bestimmte Richtung orientiert und über eine Ankervorrichtung an dem Packer festgelegt. Die Ablenkkeileinheit wird dabei herkömmlicherweise über eine Scherbolzenverbindung an einem Startschneidwerkzeug befestigt und mit dem das Startschneidwerkzeug aufweisenden Bohrstrang in das Bohrloch eingebracht. Das herkömmlicherweise eingesetzte Startwerkzeug hat einen vorderen, zur Ablenkkeileinheit hin orientierten Kegel, der eine mit dem Ablenkkeilstück am oberen Ende der Ablenkkeileinheit zusammenwirkende Ablenkführung bildet. Nach Abscheren der Bolzenverbindung ist mit dem Startwerkzeug während der ablenkenden Abwärtsbewegung des Kegels in den Rohrwandungsbereich ein Fenster anzufräsen. Ist der Kegel jedoch an dem Ablenkkeilstück entlanggelaufen, befindet sich das Startwerkzeug noch mit seiner Stirnfläche direkt oberhalb der Ablenkkeileinheit und damit in seiner Schneidendstellung. Der Kegel des Startwerkzeuges verklemmt sich zwischen Ablenkkeilstück und Rohrwand. Mithin ist für die weiteren notwendigen Schneidarbeiten zur Erstellung der Ablenkarbeiten wie Auffräsen, Erweitern und Aufräumen des Fensters der eingesetzte Bohrstrang mehrfach zu ziehen, mit neuen Schneidwerkzeugen zu versehen und wieder abzulassen. Der damit einhergehende Arbeits- und Montageaufwand ist erheblich.When creating a conventional borehole deflection from z. B. the pipe wall of a cased borehole, a packer is first placed in the borehole, a deflecting wedge unit having a wedge surface is oriented in a certain direction and fixed to the packer via an anchor device. The deflection wedge unit is conventionally fastened to a start cutting tool via a shear pin connection and introduced into the borehole with the drill string having the start cutting tool. The conventionally used starting tool has a front cone oriented towards the deflection wedge unit, which cone forms a deflection guide which interacts with the deflection wedge piece at the upper end of the deflection wedge unit. After the bolt connection has been sheared off, a window has to be milled with the starting tool during the deflecting downward movement of the cone into the tube wall area. However, if the cone ran along the deflection wedge piece, the starting tool is still with its end face directly above the deflection wedge unit and thus in its cutting end position. The cone of the starter tool jams between the deflection wedge piece and the pipe wall. Therefore, the drill string used must be pulled several times for the other necessary cutting work to create the deflection work such as milling, expanding and tidying up the window, provided with new cutting tools and lowered again. The associated work and assembly effort is considerable.

Es ist Aufhabe der vorliegenden Erfindung, eine Vorrichtung der eingangs genannten Art zu schaffen, mit der mit vermindertem Arbeits- und Montageaufwand eine Ablenkbohrung zu erstellen ist. Diese Aufgabe löst die Erfindung durch eine Vorrichtung mit den Merkmalen des Anspruchs 1. Hinsichtlich wesentlicher weiterer Ausgestaltungen wird auf die Ansprüche 2 bis 11 verwiesen.It is the object of the present invention to provide a device of the type mentioned at the outset with which a deflection bore can be produced with reduced work and assembly effort. This object is achieved by the invention with a device having the features of claim 1. With regard to further essential configurations, reference is made to claims 2 to 11.

Bei der erfindungsgemäßen Vorrichtung mit der den Fensterausschneidvorgang unmittelbar bewirkenden, hinter dem Schneidwerkzeug gelegenen Ablenkführung, ist das Startschneidwerkzeug nach Einleitung des Ablenkvorganges in einem Bereich des Bohrlochs gelegen, wo es mit seinen stirnseitigen bzw. vorderen Schneidflächen nicht mehr an der Stirnkante der Ablenkkeileinheit zur Anlage kommt. Darüber hinaus kann ein nicht schneidfähiges Führungselement wie zum Beispiel ein Konusteil den Fortschritt des Werkzeuges nicht behindern. Das Startschneidwerkzeug befindet sich nach dem Startschneid- bzw. fräsvorgang mit seiner Stirnfläche im Futterrohr und ist voll schneidfähig, ohne daß eine Zerstörung der Ablenkkeileinheit zu befürchten wäre. Ein Ziehen des Stranges und Auswechseln des Startschneidwerkzeuges bei Erreichen eines der Länge der Ablenkführung entsprechenden Bohrfortschritts ist daher nicht erforderlich. Die damit einhergehende Zeitersparnis ist erheblich. Durch die erfindungsgemäße Ausbildung der Vorrichtung ist damit die Voraussetzung geschaffen, dem vorauseilenden Schneidwerkzeug weitere Fräswerkzeuge nachzuordnen, um mit einer Bohrgarnitur das Fenster auszuschneiden, zu erweitern, Räumarbeiten durchzuführen und insgesamt die Ablenkbohrung so weit herzustellen, bis mit einer üblichen Bohrgarnitur weitergearbeitet werden kann.In the device according to the invention with the deflection guide directly behind the cutting tool and causing the window cutting process, the start cutting tool is located after the initiation of the deflection process in an area of the borehole where its front or front cutting surfaces no longer come to rest on the front edge of the deflection wedge unit . In addition, a guide element that cannot be cut, such as a cone part, cannot hinder the progress of the tool. The start cutting tool is located after the start cutting or milling process with its end face in the casing and is fully cutable without fear of destroying the deflection wedge unit. It is therefore not necessary to pull the strand and replace the starting cutting tool when a drilling progress corresponding to the length of the deflection guide has been reached. The associated time savings are considerable. The design of the device according to the invention thus creates the prerequisite for arranging further milling tools after the leading cutting tool in order to cut out and expand the window with a drilling set, Carry out clearing work and make the deflection hole until you can continue working with a conventional drilling set.

Bevorzugtermaßen umfaßt die Ablenkkeileinheit eine das Startschneidwerkzeug bzw. das vorauseilende Werkzeug in der Startposition hintergreifende, mit der Ablenkführung zusammenwirkende Ablenkrampe, wobei z. B. die Ablenkführung des Startschneidwerkzeuges durch einen diesem nachgeordneten, konisch zulaufenden Werkzeughalterbereich gebildet ist. Hieran können sich dann weitere Schneidwerkzeuge direkt anschließen, z. B. ein Fräswerkzeug mit gegenüber dem Schneidwerkzeug größeren Schneiddurchmesser, mit dem das angeschnittene Bohrlochfenster im Futterrohrbereich zu erweitern ist. Einem solchen Fräswerkzeug kann sich ein weiteres Räumschneidwerkzeug mit gegenüber dem ersten nachgeordneten Werkzeug vergrößertem Schneiddurchmesser anschließen. Gleichfalls besteht die Möglichkeit, diesem noch weitere Räumschneidwerkzeuge nachzuordnen, falls die Räumkapazität im jeweiligen Einzelfalle nicht ausreichen sollte.The deflection wedge unit preferably comprises a deflection ramp engaging behind the starting cutting tool or the leading tool in the starting position and interacting with the deflection guide. B. the deflection guide of the starting cutting tool is formed by a downstream, tapered tool holder area. This can then be followed directly by other cutting tools, e.g. B. a milling tool with a larger cutting diameter than the cutting tool, with which the cut borehole window in the casing area is to be expanded. Such a milling tool can be followed by a further broaching tool with a larger cutting diameter than the first downstream tool. Likewise, there is the possibility of adding further broaching tools if the broaching capacity should not be sufficient in the individual case.

Weitere Einzelheiten und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung und der Zeichnung, in der ein Ausführungsbeispiel des Gegenstandes der Erfindung näher veranschaulicht ist. Im einzelnen zeigen:

Fig. 1
eine abgebrochene schematische Darstellung eines Ausführungsbeispiels einer Vorrichtung nach der Erfindung mit Packer, Ablenkkeileinheit sowie dem Startschneidwerkzeug;
Fig. 2
eine abgebrochene Darstellung des in Fig. 1 veranschaulichten Ausführungsbeispiels der Vorrichtung nach der Erfindung mit Startschneidwerkzeug sowie mit weiteren, diesem nachgeordneten Schneidwerkzeugen, und
Fig. 3A, 3B, 3C
schematische Darstellungen beim Betrieb des veranschaulichten Ausführungsbeispiels nach der Erfindung.
Further details and advantages of the invention will become apparent from the following description and the drawing, in which an embodiment of the object of the invention is illustrated in more detail. In detail show:
Fig. 1
a broken schematic representation of an embodiment of a device according to the invention with packer, deflection wedge unit and the starting cutting tool;
Fig. 2
a broken view of the illustrated in Fig. 1 embodiment of the device according to the invention with starting cutting tool and with further, downstream of this cutting tools, and
3A, 3B, 3C
schematic representations during operation of the illustrated embodiment according to the invention.

Die in den Figuren 1 bis 3 veranschaulichte Vorrichtung nach der Erfindung umfaßt einen Packer 1 sowie eine Ablenkkeileinheit 2 mit Ablenkkeilfläche 3. Wie insbesondere auch näher in Fig. 1 veranschaulicht ist, sind Packer 1 und Ablenkkeileinheit 2 als Komplettbaueinheit ausgebildet und mithin gemeinsam in einem Bohrloch festzulegen. Die Ablenkkeileinheit 2 bzw. die Ablenkkeilfläche 3 soll in dem veranschaulichten Ausführungsbeispiel einen Aus- bzw. Ablenkwinkel von etwa 2° bis 3° haben. Die Ablenkkeilfläche 3 besteht aus einem vergüteten Hochleistungsstahl, so daß ein Fräswerkzeug an dieser entlang geführt werden kann unter gleichzeitigem Ausschneiden eines Futterrohrfensters, ohne Keilflächenzerstörungen befürchten zu müssen. Die Ablenkkeileinheit 2 ist direkt mit dem Packer 1 verbunden und hat einen hydraulischen Durchgang 4, um den Packer 1 mitsamt der Ablenkkeileinheit 2 in dem Bohrloch zu setzen. Im übrigen umfaßt die Ablenkkeileinheit 2 noch eine in der Darstellung nach Fig. 1 nicht sichtbare rückseitige Hydraulikleitung, an deren oberem Ende sich ein Schlauch 5 mit einer im einzelnen nicht sichtbaren Schnellkupplung anschließt. Der Schlauch 5 ist mit dem mit 6 bezifferten Startschneidwerkzeug zu verbinden und schafft somit eine direkte Verbindung zur Spülungsversorgung, schließt gleichzeitig jedoch auch die in der Zeichnung nicht sichtbaren Spülungsöffnungen des Startschneidwerkzeugs 6.The device according to the invention illustrated in FIGS. 1 to 3 comprises a packer 1 and a deflecting wedge unit 2 with a deflecting wedge surface 3. As is also illustrated in more detail in particular in FIG. 1, the packer 1 and the deflecting wedge unit 2 are designed as a complete structural unit and therefore together in one borehole to be determined. The deflection wedge unit 2 or the deflection wedge surface 3 should have a deflection or deflection angle of approximately 2 ° to 3 ° in the illustrated exemplary embodiment. The deflecting wedge surface 3 consists of a tempered high-performance steel, so that a milling tool can be guided along this while simultaneously cutting out a casing tube window without having to fear destruction of the wedge surface. The deflection wedge unit 2 is connected directly to the packer 1 and has a hydraulic passage 4 in order to place the packer 1 together with the deflection wedge unit 2 in the borehole. Otherwise, the deflecting wedge unit 2 also comprises a hydraulic line on the rear side, which is not visible in the illustration according to FIG. The hose 5 is to be connected to the start cutting tool numbered 6 and thus creates a direct connection to the flushing supply, but at the same time also closes the flushing openings of the starting cutting tool 6 that are not visible in the drawing.

Im Bereich 8 zwischen den Schneidwerkzeugen 6 und 7 befindet sich die durch Überlast lösbare Aufhängung der Ablenkkeileinheit 12 (Fig. 2). Im Werkzeughalterbereich unter dem nachgeordneten Frässchneidwerkzeug 7 ist die Ablenkführung 9 des vorauseilenden Schneidwerkzeuges 6 in Gestalt eines konisch nach unten zulaufenden Werkzeughalterbereiches angebracht, die mithin in Bohrfortschrittsrichtung ebenfalls dem Schneidwerkzeug 6 nachgeordnet ist.In the area 8 between the cutting tools 6 and 7 there is the suspension of the deflection wedge unit 12 which can be released by overload (FIG. 2). The deflection guide 9 of the leading cutting tool 6 is arranged in the form of a tapering tool holder area in the tool holder area under the downstream milling cutting tool 7, which is therefore also arranged downstream of the cutting tool 6 in the direction of drilling progress.

Die Ablenkkeileinheit 2 umfaßt ihrerseits an ihrem oberen, den Schwerstangen des allgemein mit 10 bezifferten Bohrstranges zugewandtem Ende eine das Startschneidwerkzeug 6 hintergreifende Ablenkrampe 11. Im einzelnen nicht sichtbar ist im Bereich der Ablenkrampe 11 des Startschneidwerkzeugs 6 über eine Scherbolzenverbindung zum Setzen und Positionieren der Vorrichtung an der Ablenkkeileinheit 2 und damit auch am Packer 1 festgelegt.The deflecting wedge unit 2 in turn comprises the start cutting tool at its upper end facing the drill rods of the drill string, generally numbered 10 6 engaging deflection ramp 11. Not visible in detail is fixed in the region of the deflection ramp 11 of the starting cutting tool 6 via a shear pin connection for setting and positioning the device on the deflection wedge unit 2 and thus also on the packer 1.

Die Ablenkrampe 11 weist ihrerseits eine Ablenkkeilfläche 13 auf, an der zu Beginn eines Ablenk- bzw. Fensterschneidvorganges der untere Bereich der Ablenkführung 9 anliegt. In der Anschneid- bzw. Ablenkstartposition überragt entsprechend dar Darstellung nach Fig. 2 die Ablenkführung 9 die Keilfläche 13 der Ablenkrampe 11, so daß das Startschneidwerkzeug 6 über die Ablenkführung 9 und die Ablenkkeilfläche 13 der Ablenkrampe 11 weg von der Bohrlochlängsachse abgelenkt werden kann, ohne zunächst mit der Ablenkkeilfläche 3 der Ablenkkeileinheit 2 in Berührung zu kommen.The deflection ramp 11 in turn has a deflection wedge surface 13 against which the lower region of the deflection guide 9 rests at the start of a deflection or window cutting process. 2, the deflection guide 9 projects beyond the wedge surface 13 of the deflection ramp 11, so that the starting cutting tool 6 can be deflected away from the longitudinal axis of the borehole via the deflection guide 9 and the deflection wedge surface 13 of the deflection ramp 11 without first to come into contact with the deflecting wedge surface 3 of the deflecting wedge unit 2.

Das dem Startschneidtwerkzeug 6 in Bohrfortschrittsrichtung unmittelbar nachgeordnete Frässchneidwerkzeug 7 hat einen äußeren Schneiddurchmesser, der zwar größer ausgebildet ist als der äußere Durchmesser des Startschneidwerkzeuges 6, jedoch noch nicht dem Durchmesser der zu erstellenden Ablenkbohrung entspricht. Mit dem Frässchneidwerkzeug 7 soll ein angeschnittenes Fenster erweitert werden. Oberhalb des Fräsers 14 des ersten nachgeordneten Schneidwerkzeuges 7 ist dieses über eine Einschnürung 15 dergestalt flexibel und damit selbst in gewissem Maße auslenkbar ausgebildet, so daß beim Ablenken auftretende Materialbelastungen infolge Biegemomente gering gehalten werden können. An das Werkzeug 7 schließt sich ein weiteres Werkzeug 7.2 an, das gleichfalls mit einem Fräser 16 ausgerüstet ist. Das Werkzeug 7.2 umfaßt gleichfalls eine Einschnürung 17 und ist damit ebenfalls zwecks Verringerung der auftretenden Materialbelastungen flexibel ausgebildet. Der Fräser 16 des Werkzeuges 7.2 hat einen Schneidaußendurchmesser, der im wesentlichen dem Durchmesser der zu erstellenden fertigen Ablenkbohrung entspricht und bildet somit ein Räumschneidwerkzeug. Zwischen dem Räumschneidwerkzeug 7.2 und dem Strang 10 können sich weitere Schneidwerkzeuge bzw. Fräser anschließen, falls im jeweiligen Einzelfall die vorhandene Räumkapazität nicht ausreichen sollte.The milling cutting tool 7 immediately downstream of the starting cutting tool 6 in the direction of the drilling progress has an outer cutting diameter which is larger than the outer diameter of the starting cutting tool 6, but does not yet correspond to the diameter of the deflection bore to be created. A cut window is to be expanded with the milling cutter tool 7. Above the milling cutter 14 of the first subordinate cutting tool 7, the latter is so flexible via a constriction 15 that it can be deflected to a certain extent, so that material loads due to bending moments that occur during deflection can be kept low. The tool 7 is followed by a further tool 7.2, which is also equipped with a milling cutter 16. The tool 7.2 also includes a constriction 17 and is therefore also flexible in order to reduce the material loads that occur. The milling cutter 16 of the tool 7.2 has an outer cutting diameter which corresponds essentially to the diameter of the finished deflection bore to be produced and thus forms a broaching tool. Additional cutting tools or milling cutters can be connected between the broaching tool 7.2 and the strand 10, if in the respective individual case the existing clearing capacity should not be sufficient.

Wie in der Fig. 3 mit den Darstellungen A, B und C näher veranschaulicht ist, ist die Packer-Ablenkkeil-Kompletteinheit mitsamt den Werkzeugen 6, 7, 7.2 am Bohrturm zu montieren, wobei Ablenkkeileinheit 2 und Fräser 6, 7, 7.2 auszurichten sind. Packer 1, Ablenkkeileinheit 2 sowie Fräswerkzeuge 6, 7, 7.2 werden dann in das Bohrloch abgelassen. Ist die angestrebte Teufe erreicht, ist die Ablenkkeileinheit 2 mittels besonderer Werkzeuge auszurichten und der Packer 1 über die hydraulischen Durchgänge 4 der Ablenkkeileinheit 2 durch Überdruck zu setzen. Alsdann sind die Verbindungsbolzen zwischen Startschneidwerkzeug 6 und Ablenkeinheit 2 abzuscheren, wonach die Vorrichtung bereit ist für den durchzuführenden Ablenk- bzw. Fensterschneidvorgang. Dazu wird die Schneidwerkzeugeinheit in Betrieb genommen, wobei zunächst das Startschneidwerkzeug 6 bei Abwärtsbewegung der Ablenkführung 9 entlang der Ablenkkeilfläche 13 der Ablenkrampe 11 ein Fenster in der Bohrlochwand anschneidet, bevor es im Rahmen einer weiteren Abwärtsbewegung mit der Ablenkkeilfläche 3 der Ablenkkeileinheit 2 in Berührung kommt (Fig. 3A). Dadurch ist sichergestellt, daß über das Startschneidwerkzeug 6 die Ablenkkeileinheit 2 in ihrem oberen Bereich nicht beschädigt wird, sondern das Startschneidwerkzeug 6 für den Fensteranschneidvorgang genutzt werden kann. Nachdem die Ablenkführung 9 vollständig über die Ablenkrampe 11 bewegt ist, fräst das nachgeordnete Schneidwerkzeug 7 zunächst die Ablenkrampe 11 bereichsweise weg, erweitert dabei aber auch schon das vom Startschneidwerkzeug 6 angeschnittene Fenster in der Bohrlochwandung (Fig. 3B). Dabei übernimmt die Führung von dem nun an der Ablenkkeilfläche 3 der Ablenkkeileinheit 2 anliegende Schneidwerkzeugs 6, das an der aus vergütetem Hochleistungsstahl bestehende Ablenkkeilfläche 3 sicher entlanggleiten kann, ohne Schäden zu verursachen. Um im übrigen Metallspäne aus der Schneidwerkzeugspülung aufzufangen, kann es je nach Bedarf zweckmäßig sein, magnetische Stangen einzusetzen. Je nach Drehmoment ist die Drehzahl und auch die Last umzustellen. Nach weiterem Bohrfortschritt hat das Startschneidwerkzeug 6 die Futterrohrwandung direkt unter seinem Zentrum, was sich durch ein vermindertes Drehmoment bei ebenfalls abfallendem Bohrfortschritt bemerkbar macht. Die Last wird daher zweckmäßigerweise zunächst weiter erhöht, um das Startschneidwerkzeug 6 aus dieser Lage herauszubringen. Nachdem das Startschneidwerkzeug 6 die Bohrlochwandung dann vollständig durchdrungen hat (Fig. 3C), ist mit dem Fräser 16 bzw. dem weiteren nachgeordneten Schneidwerkzeug 7.2 der Fensterbereich zu erweitern und zu räumen, wobei das Startschneidwerkzeug 6 weiter in die Formation bohrt, bis sichergestellt ist, daß das Fräswerkzeug 7.2 den Bohrwandungsbereich vollständig durchfahren hat. Bevor mit einer Standardbohrgarnitur durch das Fenster gefahren wird, ist es zweckmäßig, den Fensterbereich der Bohrlochwandung zu erweitern bzw. eventuell noch vorstehende Teile zuerst zu entfernen, was gleichfalls mit der Vorrichtung nach der Erfindung und den Schneidwerkzeugen 6, 7 und 7.2 vollzogen werden kann. Nachdem die Fräs- bzw. Schneidarbeiten im Fenster der Bohrlochwandung abgeschlossen sind, kann der Bohrstrang gegen eine Standardbohrgarnitur ausgetauscht werden.As is illustrated in more detail in FIGS. 3 with the representations A, B and C, the packer / deflecting wedge complete unit together with the tools 6, 7, 7.2 are to be mounted on the derrick, wherein the deflecting wedge unit 2 and milling cutters 6, 7, 7.2 are to be aligned . Packer 1, deflection wedge unit 2 and milling tools 6, 7, 7.2 are then lowered into the borehole. Once the desired depth has been reached, the deflection wedge unit 2 is to be aligned using special tools and the packer 1 is set by means of overpressure via the hydraulic passages 4 of the deflection wedge unit 2. The connecting bolts between the starting cutting tool 6 and the deflection unit 2 are then to be sheared off, after which the device is ready for the deflection or window cutting process to be carried out. For this purpose, the cutting tool unit is put into operation, with the starting cutting tool 6 first cutting a window in the borehole wall when the deflection guide 9 moves downward along the deflection wedge surface 13 of the deflection ramp 11 before it comes into contact with the deflection wedge surface 3 of the deflection wedge unit 2 as part of a further downward movement ( 3A). This ensures that the deflecting wedge unit 2 is not damaged in its upper region via the starting cutting tool 6, but that the starting cutting tool 6 can be used for the window cutting process. After the deflection guide 9 has been moved completely over the deflection ramp 11, the downstream cutting tool 7 first mills away the deflection ramp 11 in some areas, but in doing so also expands the window in the borehole wall cut by the starting cutting tool 6 (FIG. 3B). In this case, the cutting tool 6, which now rests on the deflecting wedge surface 3 of the deflecting wedge unit 2, takes over the guidance and can safely slide along the deflecting wedge surface 3, which is made of tempered high-performance steel, without causing damage. In order to collect metal shavings from the cutting tool rinse, it may be expedient to use magnetic rods as required. Depending on the torque, the speed and the load must be changed. After further drilling progress, the start cutting tool has 6 the casing wall directly below its center, which is noticeable by a reduced torque with decreasing drilling progress. The load is therefore expediently initially increased further in order to bring the starting cutting tool 6 out of this position. After the starting cutting tool 6 has completely penetrated the borehole wall (FIG. 3C), the window area is to be expanded and cleared with the milling cutter 16 or the further downstream cutting tool 7.2, the starting cutting tool 6 drilling further into the formation until it is ensured that that the milling tool 7.2 has completely passed through the drilling wall area. Before driving through the window with a standard drilling set, it is expedient to expand the window area of the borehole wall or to remove any protruding parts first, which can likewise be carried out with the device according to the invention and the cutting tools 6, 7 and 7.2. After the milling or cutting work in the window of the borehole wall has been completed, the drill string can be exchanged for a standard drill set.

Claims (11)

Vorrichtung zum Bohren einer Neben- oder Ablenkbohrung eines insbesondere verrohrten Bohrlochs in unterirdischen Gesteins- oder Erdformationen mit einer mittels eines Packers (1) im Bohrloch festlegbaren Ablenkkeileinheit (2) sowie mit einem an einem Bohrstrang (10) befestigbaren Startschneidwerkzeug (6) zum Ausschneiden eines Bohrlochfensters, welchem eine zur Einleitung eines Ablenkbohrvorganges mit der Ablenkkeileinheit (2) in Wirkverbindung stehende Ablenkführung (9) zugeordnet ist, dadurch gekennzeichnet, daß die Ablenkführung (9) dem Startschneidwerkzeug (6) in Bohrfortschrittsrichtung nachgeordnet ist.Device for drilling a secondary or deflection bore of a particularly well-drilled borehole in underground rock or earth formations with a deflecting wedge unit (2) which can be fixed in the borehole by means of a packer (1) and with a starting cutting tool (6) which can be fastened to a drill string (10) for cutting out a Borehole window, which is assigned a deflection guide (9) which is operatively connected to the deflection wedge unit (2) to initiate a deflection drilling process, characterized in that the deflection guide (9) is arranged downstream of the starting cutting tool (6) in the direction of drilling progress. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Ablenkkeileinheit (2) eine das Startschneidwerkzeug (6) hintergreifende, mit der Ablenkführung (9) zusammenwirkende Ablenkrampe (11) umfaßt.Apparatus according to claim 1, characterized in that the deflection wedge unit (2) comprises a deflection ramp (11) which engages behind the start cutting tool (6) and cooperates with the deflection guide (9). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Ablenkführung (9) des Startschneidwerkzeuges (6) durch einen diesem nachgeordneten, konisch zulaufenden Werkzeugschaftbereich gebildet ist.Apparatus according to claim 1 or 2, characterized in that the deflection guide (9) of the starting cutting tool (6) is formed by a tapered tool shank region arranged after it. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß dem Startschneidwerkzeug (6) ein erstes, das angeschnittene Bohrlochfenster erweiterndes Schneidwerkzeug (14) und diesem ein oder mehrere Räumschneidwerkzeuge (16) nachgeordnet sind.Device according to one of claims 1 to 3, characterized in that the starting cutting tool (6) is followed by a first cutting tool (14) which widens the cut borehole window and this is followed by one or more broaching cutting tools (16). Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß dem Startschneidwerkzeug (6) nachgeordnete Schneidwerkzeuge (14, 16) bereichsweise flexibel ausgebildet sind.Apparatus according to claim 4, characterized in that cutting tools (14, 16) arranged downstream of the starting cutting tool (6) are flexible in some areas. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß dein Startschneidwerkzeug (6) nachgeordnete Schneidwerkzeuge (14, 16) Auslenkungen zulassende Einschnürungen (15, 17) umfassen.Apparatus according to claim 5, characterized in that your starting cutting tool (6) downstream cutting tools (14, 16) comprise constrictions (15, 17) allowing deflections. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Packer (1) und die Ablenkkeileinheit (2) als eine gemeinsame, im Bohrloch festlegbare Komplettbaueinheit ausgebildet sind.Device according to one of claims 1 to 6, characterized in that the packer (1) and the deflection wedge unit (2) are designed as a common complete unit which can be fixed in the borehole. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Ablenkkeileinheit (2) zumindest bereichsweise aus einem vergüteten Hochleistungsstahl besteht.Device according to one of claims 1 to 7, characterized in that the deflecting wedge unit (2) consists at least in regions of a tempered high-performance steel. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß die das Startschneidwerkzeug (6) hintergreifende Ablenkrampe (11) zumindest teilweise von einem dem Startschneidwerkzeug (6) nachgeordneten Schneidwerkzeug (14) wegfräsbar ist.Device according to one of claims 4 to 7, characterized in that the deflection ramp (11) engaging behind the starting cutting tool (6) can be at least partially milled away by a cutting tool (14) arranged downstream of the starting cutting tool (6). Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Ablenkkeileinheit (2), der Packer (1) und das Startschneidwerkzeug (6) zum Orientieren und Setzen der Vorrichtung in einem Bohrloch über ein an der Ablenkführung (9) des Startschneidwerkzeuges (6) angreifende Bolzenverbindung aneinander festlegbar sind.Device according to one of claims 1 to 9, characterized in that the deflecting wedge unit (2), the packer (1) and the starting cutting tool (6) for orienting and setting the device in a borehole via a on the deflecting guide (9) of the starting cutting tool ( 6) attacking bolt connection can be fixed to each other. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Ablenkkeileinheit (2) einen hydraulischen Durchgang (4) für einen Packer (1) sowie einen mit dem Startschneidwerkzeug (6) mittels Schnellkupplungen verbindbaren Hydraulikanschluß umfaßt.Apparatus according to claim 7, characterized in that the deflecting wedge unit (2) comprises a hydraulic passage (4) for a packer (1) and a hydraulic connection which can be connected to the starting cutting tool (6) by means of quick-release couplings.
EP90120537A 1989-12-22 1990-10-26 Apparatus for drilling an offset or side-tracked well, especially from a cased well Expired - Lifetime EP0434924B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3942438 1989-12-22
DE3942438A DE3942438A1 (en) 1989-12-22 1989-12-22 DEVICE FOR DRILLING A SUB-DRILLING OR DEFLECTING DRILL OF A PARTICULARLY PIPED HOLE

Publications (2)

Publication Number Publication Date
EP0434924A1 true EP0434924A1 (en) 1991-07-03
EP0434924B1 EP0434924B1 (en) 1993-09-22

Family

ID=6396110

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120537A Expired - Lifetime EP0434924B1 (en) 1989-12-22 1990-10-26 Apparatus for drilling an offset or side-tracked well, especially from a cased well

Country Status (5)

Country Link
US (1) US5109924A (en)
EP (1) EP0434924B1 (en)
CA (1) CA2033048A1 (en)
DE (1) DE3942438A1 (en)
NO (1) NO905506L (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994006996A1 (en) * 1992-09-16 1994-03-31 Weatherford U.S., Inc. Whipstock assembly
WO1994009243A2 (en) * 1992-10-19 1994-04-28 Baker Hughes Incorporated Retrievable whipstock system
GB2246585B (en) * 1990-07-31 1995-03-22 Masx Energy Services Group Inc Hydraulically set anchor for well tools
WO2008104005A2 (en) * 2007-02-23 2008-08-28 Baker Hughes Incorporated Casing window milling assembly

Families Citing this family (103)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5318132A (en) * 1992-10-28 1994-06-07 Marathon Oil Company Retrievable whipstock/packer assembly and method of use
US5335737A (en) * 1992-11-19 1994-08-09 Smith International, Inc. Retrievable whipstock
US5462120A (en) 1993-01-04 1995-10-31 S-Cal Research Corp. Downhole equipment, tools and assembly procedures for the drilling, tie-in and completion of vertical cased oil wells connected to liner-equipped multiple drainholes
US5287921A (en) * 1993-01-11 1994-02-22 Blount Curtis G Method and apparatus for setting a whipstock
US6024168A (en) * 1996-01-24 2000-02-15 Weatherford/Lamb, Inc. Wellborne mills & methods
US5887655A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc Wellbore milling and drilling
US5429187A (en) * 1994-03-18 1995-07-04 Weatherford U.S., Inc. Milling tool and operations
US5826651A (en) * 1993-09-10 1998-10-27 Weatherford/Lamb, Inc. Wellbore single trip milling
US5425417A (en) * 1993-09-10 1995-06-20 Weatherford U.S., Inc. Wellbore tool setting system
US5787978A (en) * 1995-03-31 1998-08-04 Weatherford/Lamb, Inc. Multi-face whipstock with sacrificial face element
US5727629A (en) * 1996-01-24 1998-03-17 Weatherford/Lamb, Inc. Wellbore milling guide and method
US5452759A (en) * 1993-09-10 1995-09-26 Weatherford U.S., Inc. Whipstock system
US5836387A (en) * 1993-09-10 1998-11-17 Weatherford/Lamb, Inc. System for securing an item in a tubular channel in a wellbore
US5887668A (en) * 1993-09-10 1999-03-30 Weatherford/Lamb, Inc. Wellbore milling-- drilling
US5522461A (en) * 1995-03-31 1996-06-04 Weatherford U.S., Inc. Mill valve
US5346017A (en) * 1993-09-27 1994-09-13 Atlantic Richfield Company Method and apparatus for setting a whipstock
US5361833A (en) 1993-11-18 1994-11-08 Triumph*Lor, Inc. Bottom set, non-retrievable whipstock assembly
NO311265B1 (en) * 1994-01-25 2001-11-05 Halliburton Co The invention device
US5425419A (en) * 1994-02-25 1995-06-20 Sieber; Bobby G. Whipstock apparatus and methods of use
US5431220A (en) * 1994-03-24 1995-07-11 Smith International, Inc. Whipstock starter mill assembly
US5445222A (en) * 1994-06-07 1995-08-29 Shell Oil Company Whipstock and staged sidetrack mill
US5443129A (en) * 1994-07-22 1995-08-22 Smith International, Inc. Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole
US5535822A (en) * 1994-09-08 1996-07-16 Enterra Corporation Apparatus for retrieving whipstock
US5803176A (en) * 1996-01-24 1998-09-08 Weatherford/Lamb, Inc. Sidetracking operations
US6056056A (en) * 1995-03-31 2000-05-02 Durst; Douglas G. Whipstock mill
US5592991A (en) * 1995-05-31 1997-01-14 Baker Hughes Inc. Method and apparatus of installing a whipstock
GB2303158B (en) * 1995-07-07 1999-09-08 Red Baron Oil Tools Rental Single trip whipstock assembly
AU710673B2 (en) * 1995-07-07 1999-09-23 Smith International, Inc. Single trip whipstock assembly
GB2341629B (en) * 1995-09-14 2000-05-31 Baker Hughes Inc Window-cutting system for downhole tubulars
US5676206A (en) * 1995-09-14 1997-10-14 Baker Hughes Incorporated Window-cutting system for downhole tubulars
US6170576B1 (en) * 1995-09-22 2001-01-09 Weatherford/Lamb, Inc. Mills for wellbore operations
US5678634A (en) * 1995-10-17 1997-10-21 Baker Hughes Incorporated Method and apparatus for retrieving a whipstock
US5697438A (en) * 1995-12-01 1997-12-16 Baker Hughes Incorporated Torque control device for downhole milling
US5657820A (en) * 1995-12-14 1997-08-19 Smith International, Inc. Two trip window cutting system
US5740864A (en) * 1996-01-29 1998-04-21 Baker Hughes Incorporated One-trip packer setting and whipstock-orienting method and apparatus
US5947201A (en) * 1996-02-06 1999-09-07 Baker Hughes Incorporated One-trip window-milling method
US6155349A (en) * 1996-05-02 2000-12-05 Weatherford/Lamb, Inc. Flexible wellbore mill
US5816324A (en) * 1996-05-03 1998-10-06 Smith International, Inc. Whipstock accelerator ramp
US6648068B2 (en) 1996-05-03 2003-11-18 Smith International, Inc. One-trip milling system
US5771972A (en) * 1996-05-03 1998-06-30 Smith International, Inc., One trip milling system
US5762143A (en) * 1996-05-29 1998-06-09 Baroid Technology, Inc. System and method for placement and retrieval of a subsurface diverting tool used in drilling and completing wells
US5813465A (en) * 1996-07-15 1998-09-29 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5730221A (en) * 1996-07-15 1998-03-24 Halliburton Energy Services, Inc Methods of completing a subterranean well
AU714721B2 (en) * 1996-07-15 2000-01-06 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5833003A (en) * 1996-07-15 1998-11-10 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
US5862862A (en) * 1996-07-15 1999-01-26 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2209958A1 (en) * 1996-07-15 1998-01-15 James M. Barker Apparatus for completing a subterranean well and associated methods of using same
AU719919B2 (en) * 1996-07-15 2000-05-18 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2210561C (en) * 1996-07-15 2004-04-06 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2210563C (en) * 1996-07-15 2004-03-02 Halliburton Energy Services, Inc. Apparatus for completing a subterranean well and associated methods of using same
CA2232941A1 (en) 1996-08-08 1998-02-12 Harrold D. Owen Method for forming a casing window
US5743331A (en) * 1996-09-18 1998-04-28 Weatherford/Lamb, Inc. Wellbore milling system
US5909770A (en) * 1996-11-18 1999-06-08 Baker Hughes Incorporated Retrievable whipstock
US5775428A (en) * 1996-11-20 1998-07-07 Baker Hughes Incorporated Whipstock-setting apparatus
US5806596A (en) * 1996-11-26 1998-09-15 Baker Hughes Incorporated One-trip whipstock setting and squeezing method
US6109347A (en) * 1997-07-03 2000-08-29 Baker Hughes Incorporated One-trip, thru-tubing, window-milling system
US6536520B1 (en) 2000-04-17 2003-03-25 Weatherford/Lamb, Inc. Top drive casing system
US6032740A (en) * 1998-01-23 2000-03-07 Weatherford/Lamb, Inc. Hook mill systems
US6076606A (en) 1998-09-10 2000-06-20 Weatherford/Lamb, Inc. Through-tubing retrievable whipstock system
CA2288494C (en) 1999-10-22 2008-01-08 Canadian Downhole Drill Systems Inc. One trip milling system
US6598678B1 (en) 1999-12-22 2003-07-29 Weatherford/Lamb, Inc. Apparatus and methods for separating and joining tubulars in a wellbore
DE60117372T2 (en) * 2000-05-05 2006-10-12 Weatherford/Lamb, Inc., Houston DEVICE AND METHOD FOR PRODUCING LATERAL DRILLING
US6684953B2 (en) 2001-01-22 2004-02-03 Baker Hughes Incorporated Wireless packer/anchor setting or activation
US6715567B2 (en) * 2001-05-02 2004-04-06 Weatherford/Lamb, Inc. Apparatus and method for forming a pilot hole in a formation
US7730965B2 (en) 2002-12-13 2010-06-08 Weatherford/Lamb, Inc. Retractable joint and cementing shoe for use in completing a wellbore
US7938201B2 (en) 2002-12-13 2011-05-10 Weatherford/Lamb, Inc. Deep water drilling with casing
USRE42877E1 (en) 2003-02-07 2011-11-01 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US7650944B1 (en) 2003-07-11 2010-01-26 Weatherford/Lamb, Inc. Vessel for well intervention
CA2492626C (en) * 2004-01-16 2010-04-20 Weatherford/Lamb, Inc. Flexible wellbore broach
US7857052B2 (en) 2006-05-12 2010-12-28 Weatherford/Lamb, Inc. Stage cementing methods used in casing while drilling
US7575049B2 (en) 2006-05-15 2009-08-18 Baker Hughes Incorporated Exit window milling assembly with improved restraining force
GB2438200B (en) * 2006-05-16 2010-07-14 Bruce Mcgarian A whipstock
US8276689B2 (en) 2006-05-22 2012-10-02 Weatherford/Lamb, Inc. Methods and apparatus for drilling with casing
US7810568B2 (en) * 2006-10-19 2010-10-12 Baker Hughes Incorporated Method of making a window in a tubular using an expandable watermelon mill
US20090139721A1 (en) * 2007-11-30 2009-06-04 Baker Hughes Incorporated Bottom Hole Assembly for Casing Window Milling
GB2467176B (en) 2009-01-27 2013-03-20 Bruce Mcgarian Apparatus and method for setting a tool in a borehole
US8069920B2 (en) * 2009-04-02 2011-12-06 Knight Information Systems, L.L.C. Lateral well locator and reentry apparatus and method
US7971645B2 (en) * 2009-04-03 2011-07-05 Baker Hughes Incorporated Four mill bottom hole assembly
CN102162343B (en) * 2011-04-14 2014-02-12 中国海洋石油总公司 Milling shoes for casing window sidetracking
RU2469172C1 (en) * 2011-07-08 2012-12-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Wedge-like diverter for drilling of side holes
RU2469171C1 (en) * 2011-07-15 2012-12-10 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Side hole drilling device
US8763685B2 (en) 2011-07-25 2014-07-01 Baker Hughes Incorporated Whipstock assembly and method for low side exit
RU2473768C1 (en) * 2011-08-19 2013-01-27 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Device for spudding of offshoots from well
RU2472913C1 (en) * 2011-08-19 2013-01-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Deflecting device for drilling of branch holes
RU2477779C1 (en) * 2011-10-13 2013-03-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Wedge-shaped diverter
US9347268B2 (en) * 2011-12-30 2016-05-24 Smith International, Inc. System and method to facilitate the drilling of a deviated borehole
CN102747977A (en) * 2012-07-20 2012-10-24 长江大学 Internal cutting device of hydraulic sleeve
US9835011B2 (en) 2013-01-08 2017-12-05 Knight Information Systems, Llc Multi-window lateral well locator/reentry apparatus and method
US9512677B2 (en) 2013-03-08 2016-12-06 Gtherm, Inc. System and method for creating lateral heat transfer appendages in a vertical well bore
US10415326B2 (en) * 2015-10-26 2019-09-17 Josh Chevalier Downhole drilling assembly with concentric alignment feature
CA3010351C (en) 2016-02-26 2020-07-21 Halliburton Energy Services, Inc. Whipstock assembly with a support member
RU2661925C1 (en) * 2017-07-27 2018-07-23 Федеральное государственное бюджетное учреждение науки Институт машиноведения им. А.А. Благонравова Российской академии наук (ИМАШ РАН) Device for installing casing filters in deep perforation channels-waveguides
CN108397137A (en) * 2018-03-01 2018-08-14 中国海洋石油集团有限公司 A kind of deflecting tool and its manufacturing method
US11136843B1 (en) 2020-03-25 2021-10-05 Baker Hughes Oilfield Operations Llc Casing exit anchor with redundant activation system
US11702888B2 (en) 2020-03-25 2023-07-18 Baker Hughes Oilfield Operations Llc Window mill and whipstock connector for a resource exploration and recovery system
US11414943B2 (en) 2020-03-25 2022-08-16 Baker Hughes Oilfield Operations Llc On-demand hydrostatic/hydraulic trigger system
US11162315B2 (en) 2020-03-25 2021-11-02 Baker Hughes Oilfield Operations Llc Window mill and whipstock connector for a resource exploration and recovery system
US11421496B1 (en) 2020-03-25 2022-08-23 Baker Hughes Oilfield Operations Llc Mill to whipstock connection system
US11162314B2 (en) 2020-03-25 2021-11-02 Baker Hughes Oilfield Operations Llc Casing exit anchor with redundant activation system
US11131159B1 (en) 2020-03-25 2021-09-28 Baker Hughes Oilfield Operations Llc Casing exit anchor with redundant setting system
US11732539B2 (en) 2021-10-22 2023-08-22 Baker Hughes Oilfield Operations Llc Electrically activated whipstock interface system
US11753892B2 (en) * 2021-10-22 2023-09-12 Baker Hughes Oilfield Operations Llc Electrically activated downhole anchor system
US11725482B2 (en) 2021-10-22 2023-08-15 Baker Hughes Oilfield Operations Llc Electrically actuated tubular cleaning system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216963A (en) * 1939-10-09 1940-10-08 Joseph E Sinclair Means for cutting windows in well casings
US2667332A (en) * 1952-03-31 1954-01-26 Oilwell Drain Hole Drilling Co Flexible shaft well drilling equipment
US3116799A (en) * 1960-08-01 1964-01-07 Drilling Control Corp Whipstock apparatus and method of using the same
US3397746A (en) * 1965-12-30 1968-08-20 Directional Service Co Of Peru Circulating mill guide
US4266621A (en) * 1977-06-22 1981-05-12 Christensen, Inc. Well casing window mill
US4397355A (en) * 1981-05-29 1983-08-09 Masco Corporation Whipstock setting method and apparatus
US4765404A (en) * 1987-04-13 1988-08-23 Drilex Systems, Inc. Whipstock packer assembly

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2020471A (en) * 1934-12-03 1935-11-12 Leslie A Layne Whipstock packer
US2105722A (en) * 1935-11-20 1938-01-18 George J Barrett Well-boring apparatus
US2509144A (en) * 1945-08-10 1950-05-23 Donovan B Grable Well plugging and whipstocking
US2882015A (en) * 1957-06-10 1959-04-14 J E Hill Directional window cutter for whipstocks
US3115935A (en) * 1960-03-18 1963-12-31 Jefferson M Hooton Well device
US3908759A (en) * 1974-05-22 1975-09-30 Standard Oil Co Sidetracking tool
US4031974A (en) * 1975-05-27 1977-06-28 Rapidex, Inc. Boring apparatus capable of boring straight holes
US4285399A (en) * 1980-07-21 1981-08-25 Baker International Corporation Apparatus for setting and orienting a whipstock in a well conduit
US4304299A (en) * 1980-07-21 1981-12-08 Baker International Corporation Method for setting and orienting a whipstock in a well conduit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2216963A (en) * 1939-10-09 1940-10-08 Joseph E Sinclair Means for cutting windows in well casings
US2667332A (en) * 1952-03-31 1954-01-26 Oilwell Drain Hole Drilling Co Flexible shaft well drilling equipment
US3116799A (en) * 1960-08-01 1964-01-07 Drilling Control Corp Whipstock apparatus and method of using the same
US3397746A (en) * 1965-12-30 1968-08-20 Directional Service Co Of Peru Circulating mill guide
US4266621A (en) * 1977-06-22 1981-05-12 Christensen, Inc. Well casing window mill
US4397355A (en) * 1981-05-29 1983-08-09 Masco Corporation Whipstock setting method and apparatus
US4765404A (en) * 1987-04-13 1988-08-23 Drilex Systems, Inc. Whipstock packer assembly

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2246585B (en) * 1990-07-31 1995-03-22 Masx Energy Services Group Inc Hydraulically set anchor for well tools
WO1994006996A1 (en) * 1992-09-16 1994-03-31 Weatherford U.S., Inc. Whipstock assembly
US5341873A (en) * 1992-09-16 1994-08-30 Weatherford U.S., Inc. Method and apparatus for deviated drilling
WO1994009243A2 (en) * 1992-10-19 1994-04-28 Baker Hughes Incorporated Retrievable whipstock system
WO1994009243A3 (en) * 1992-10-19 1994-08-04 Baker Hughes Inc Retrievable whipstock system
GB2278138A (en) * 1992-10-19 1994-11-23 Baker Hughes Inc Retrievable whipstock system
US5474126A (en) * 1992-10-19 1995-12-12 Baker Hughes Incorporated Retrievable whipstock system
WO2008104005A2 (en) * 2007-02-23 2008-08-28 Baker Hughes Incorporated Casing window milling assembly
WO2008104005A3 (en) * 2007-02-23 2008-12-24 Baker Hughes Inc Casing window milling assembly

Also Published As

Publication number Publication date
NO905506L (en) 1991-06-24
DE3942438C2 (en) 1992-01-30
NO905506D0 (en) 1990-12-20
CA2033048A1 (en) 1991-06-23
EP0434924B1 (en) 1993-09-22
US5109924A (en) 1992-05-05
DE3942438A1 (en) 1991-07-11

Similar Documents

Publication Publication Date Title
EP0434924B1 (en) Apparatus for drilling an offset or side-tracked well, especially from a cased well
DE4000489C2 (en)
EP0216100B1 (en) Boring ram with a piston-actuated percussion cutter
DE19780282B3 (en) Self-supporting expansion drill
DE3326246C2 (en)
DE2306397A1 (en) METHOD AND DEVICE FOR MOUNTAIN MILL ROTARY OR ROTARY DRILLING
DE60317369T2 (en) A bit assembly
EP0494408B1 (en) Method and device for enlarging a well
DE2343079C2 (en) Device for the substantially horizontal piercing of a dam or the like.
DE2701044A1 (en) EARTH DRILLING JIG
DE4220430C2 (en) Method and device for making an earth borehole
EP0368838B1 (en) Device for the consolidation of geological formations having no or only little stability
DE3935897A1 (en) METHOD AND DEVICE FOR STONE DRILLING
DE2161884A1 (en) Diamond drilling device with drill hole support
AT390303B (en) DRILLING DEVICE
EP3115511A1 (en) Method for making an overlapped drilling pile wall
DE3029963C2 (en) Drilling nozzle
DE3783699T2 (en) TURNING TOOL WITH AN EXTENDABLE CLEANER.
DE1097386B (en) Drilling machine for drilling large boreholes for mining
DE1188014B (en) Rock drill with eccentric drilling tool
DE3408246C2 (en) Jacking device for creating underground cavities using the pipe pre-pressing process
DE3423789A1 (en) Drilling device for rock boreholes
DE1187566B (en) Drilling tool for hammer drilling with a rotating drill
DE3829216C2 (en)
DE1161524B (en) Method and device for producing drill shafts and similar bores

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE FR GB NL

17P Request for examination filed

Effective date: 19911026

17Q First examination report despatched

Effective date: 19930302

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE FR GB NL

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19931118

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940929

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19950913

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19951031

BERE Be: lapsed

Owner name: BAKER-HUGHES INC.

Effective date: 19951031

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19970630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20091024

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20091026

Year of fee payment: 20

REG Reference to a national code

Ref country code: NL

Ref legal event code: V4

Effective date: 20101026

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20101025

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20101026

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20101025