EP0397875B1 - Pipe roller-expanding device - Google Patents

Pipe roller-expanding device Download PDF

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Publication number
EP0397875B1
EP0397875B1 EP19890902699 EP89902699A EP0397875B1 EP 0397875 B1 EP0397875 B1 EP 0397875B1 EP 19890902699 EP19890902699 EP 19890902699 EP 89902699 A EP89902699 A EP 89902699A EP 0397875 B1 EP0397875 B1 EP 0397875B1
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Prior art keywords
device
roller
casing
rolling
axis
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Expired - Lifetime
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EP19890902699
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German (de)
French (fr)
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EP0397875A4 (en )
EP0397875A1 (en )
Inventor
Konstantin Viktorovich Meling
Jury Anatolievich Safonov
Gabdrashit Sultanovich Abdrakhmanov
Jury Grigorievich Mikhailin
Rodion Mikhailovich Bogomolov
Valentin Vasilievich Salomatin
Almaz Adgamovich Mukhametshin
Salikhzyan Mukhametzyanovich Mingazov
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.)
TATARSKY GOSUDARSTVENNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT NEFTYANOI PROMYSHLENNOSTI
TATARSKY GNI I PI NEFTYANOI PR
Original Assignee
TATARSKY GNI I PI NEFTYANOI PR
TATARSKY GOSUDARSTVENNY NAUCHNO-ISSLEDOVATELSKY I PROEKTNY INSTITUT NEFTYANOI PROMYSHLENNOSTI
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • E21B43/103Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/105Expanding tools specially adapted therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00Application of procedures in order to alter the diameter of tube ends
    • B21D41/02Enlarging
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B29/00Cutting 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
    • E21B29/10Reconditioning of well casings, e.g. straightening
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/02Subsoil filtering
    • E21B43/10Setting of casings, screens, liners or the like in wells
    • E21B43/103Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49908Joining by deforming
    • Y10T29/49938Radially expanding part in cavity, aperture, or hollow body
    • Y10T29/4994Radially expanding internal tube
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/53Means to assemble or disassemble
    • Y10T29/53652Tube and coextensive core

Abstract

The device is intended for roller-expanding the profiled pipes which are mounted to close off well drilling complication zones, as well as to straighten distorted casing pipes. The device comprises a casing (1) and a roller-expanding element (3) mounted in bearings (4, 5) on a pivot journal (2) located on the casing (1) at an angle to the longitudinal axis of the latter. The roller-expanding element (3) consists of a spherical segment (9) whose external surface consists of interchanging sections of spherical surfaces (10) and lateral cylindrical surfaces (11), whose geometrical axes are located in a plane perpendicular to the axis (13) of the pivot journal (2).

Description

  • Die Erfindung bezieht sich auf die Bohrtechnik und betrifft insbesondere eine Vorrichtung zum Einwalzen von Rohren. The invention relates to the drilling and more particularly relates to a device for rolling tubes.
  • Am besten eignet sich diese Erfindung für das Einwalzen von Profilrohren, die für die Abdeckung von Komplikationszonen im Bohrvorgang eingesetzt werden, die durch einen intensiven Spülungs- und Zementschlämmenverlust, durch einen Flüssigkeits- bzw. Gaszufluß aus der angebohrten Schicht in die Bohrung gekennzeichnet sind und die durch einen Nachfall entstehen. At best, this invention is suitable for the rolling of profiled pipes, which are used for the cover of complication zones in the drilling process, which are characterized by intensive rinsing and Zementschlämmenverlust, by a liquid or gas intake from being pierced layer in the hole and the caused by a caving.
  • Beim Niederoringen von Tiefbohrungen zur Erdöl- bzw. Gasförderung trifft man öfters Schichten, die miteinander nicht verträglich sind, dh, Schichten mit anomal hohem bzw. niedrigem Schichtdruck, sowie Schichten mit einem Nachfall an. When Niederoringen of deep wells for oil and gas production is often true layers which are not compatible with each other, that is, layers with abnormally high or low pressure layer, and layers with a caving in.
  • Bisher wurden derartige Schichten durch das Einfahren von zusätzlichen kürzeren und Zwischenrohrtouren abgedeckt. Previously, such coatings were covered by driving in additional shorter intermediate tube and tours. Diese Maßnahmen erfordern jedoch einen hohen Materialaufwand, bedingt durch eine unabdingbare Zementation der Rohrtouren innerhalb der Bohrung, sowie durch einen hohen Aufwand an Metall, Zement und Arbeitszeit. However, these measures require a high material costs due to an indispensable cementation of the pipe routes within the bore, and a high cost of metal, cement and labor. Hinzu kommt, daß nach dem Einbau einer weiteren Rohrtour der Bohrlochdurchmesser abnimmt, wodurch sich die Betriebsbedingungen verschlechtern. In addition, decreases after the installation of a further pipe string to the borehole diameter, thereby deteriorating the operating conditions.
  • Um das weitere Bohren ohne Abnahme des vorbestimmten Bohrlochdurchmessers sicherzustellen, wird derzeit der Bohrlochabschnitt in der Zone der aufgeschlossenen, nach den Bohrverhältnissen komplizierter gewordenen Schicht erweitert, und in dem erweiterten Bohrlochabschnitt wird, zB, eine Profilrohrtour gesetzt, die gegen die Wandung des erweiterten Bohrlochabschnittes durch die Erzeugung darin eines Druckes mit späterer Kalibrierung ihres inneren Durchlaßkanals auf den vorgegebenen Bohrlochdurchmesser unter Verwendung eines Rohreinwalzapparates gedrückt wird. To ensure further drilling without removal of the predetermined hole diameter, the hole portion in the zone of the disrupted, complicated become after the Bohrverhältnissen layer is being extended, and is in the extended wellbore section, for example, set a profile pipe string, through against the wall of the enlarged borehole section generating a pressure therein with a later calibration of its inner passage channel is pushed to the predetermined borehole diameter using a Rohreinwalzapparates.
  • Es ist bereits eine Vorrichtung zum Einwalzen von Futterrohren (SU, A, 371340) bekannt, die ein Gehäuse aufweist, das mit einer Kegelführung mit Nuten, in denen Einwalzelemente in Form von zylindrischen Rollen bewegbar angeordnet sind, starr verbunden ist. It is already an apparatus for rolling of liners (SU, A, 371340) is known which comprises a housing which is rigidly connected to a plug guide with grooves in which Einwalzelemente are movably arranged in the form of cylindrical rollers. Die Nuten verlaufen in einem Winkel zur Gehäuseachse, wobei ihr Unterteil relativ zu dem Oberteil in Drehrichtung der Vorrichtung versetzt ist. The grooves extend at an angle to the housing axis, wherein its lower part is offset relative to the upper part in the direction of rotation of the device.
  • An den Gestängerohren fährt man die Vorrichtung in die Bohrung bis an den zerquetschten Abschnitt der Futterrohre ein und beginnt mit der Drehung, indem eine bestimmte Belastung aufrechterhalten wird, dabei wälzen sich die Rollen über den zerquetschten Futterrohrabschnitt und glätten diesen. To the drill pipes, the device to drive in the bore as far as the crushed portion of the feed pipes and starts to rotate by a certain load is maintained while the rollers roll over the crushed casing section and flatten it.
  • Nachteilig wirkt sich bei dieser Vorrichtung ihre geringe Betriebssicherheit aus, weil die in den Nuten der Kegelführung des Gehäuses angeordneten Rollen infolge der Eindringung der Schwebepartikel, einschließlich Schleifpartikel, aus der im Bohrloch enthaltenen Flüssigkeit in diese Nuten verkeilt und schnell verschlissen werden. A disadvantage to their low reliability affects in this apparatus, because arranged in the grooves of the tapered guide of the housing rollers as a result of penetration of the suspended particles, including abrasive particles, from the information contained in the wellbore fluid wedged into these grooves and be worn quickly.
  • Ein weiterer Nachteil der Vorrichtung besteht in einer geringen Einwalzgeschwindigkeit von Rohren auf Grund hoher Reibkräfte der Rollen in den Nuten der Kegelführung des Gehäuses. A further disadvantage of the device is in a low Einwalzgeschwindigkeit of pipes due to high frictional forces of the rollers in the grooves of the tapered guide of the housing.
  • Es ist ferner eine Vorrichtung zum Einwalzen von Futterrohren nach deren Zerquetschen im Bohrloch (SU, A, 467994) bekannt, die ein Gehäuse in Form einer geraden und einer rückläufigen Kegelführung mit Nuten, in denen in einem Winkel zur geometrischen Längsachse des Gehäuses in Lagern Einwalzelemente in Form von Kegelrollen, deren größere Grundflächen dem Mittelpunkt des Gehäuses zugewandt sind, montiert sind, enthält. It is further an apparatus for rolling of liners after their crushing in the well (SU, A, 467994) is known comprising a housing in form of a straight and a downward conical guide with grooves in which at an angle to the geometrical longitudinal axis of the housing in bearings Einwalzelemente in the form of tapered rollers, whose larger base surfaces are facing the center of the housing, are mounted, contains.
  • Die Arbeitsweise dieser Vorrichtung ist der eingangs beschriebenen ähnlich. The operation of this device is similar to that described above.
  • Als Hauptnachteil der bekannten Vorrichtung gilt eine geringfügige Festigkeit der Lager deren Rollen, wodurch diese keinen für das Einwalzen der Profilrohre erforderlichen hohen Belastungen ausgesetzt werden dürfen und folglich der Effekt durch das Einwalzen der besagten Rohre zurückgeht. As a main disadvantage of the known device, a slight strength of the bearing rollers thereof, whereby these do not have high loads required for the rolling of the profile pipes may be exposed and consequently the effect back by the rolling of said tubes applies.
  • Ein weiterer Nachteil zeigt sich in der schlechten Funktionstüchtigkeit, dadurch veranlaßt, daß Schwebe- und Schleifpartikel aus der im Bohrloch vorhandenen Flüssigkeit in die Nuten mit den darin befindlichen Rollen eindringen, was ebenfalls ein Verkeilen und einen schnellen Verschleiß der Rollen nach sich zieht. A further disadvantage is in the poor functioning, thereby causing floating and abrasive particles present in the wellbore fluid entering into the grooves with the therein rollers, which also pulls wedging and rapid wear of the rollers themselves.
  • Ein Nachteil der bekannten Vorrichtung ist auch ihr niedriger Wirkungsgrad, verursacht durch hohe Reibkräfte der Rollen in den Nuten der Kegelführungen, im besonderen im Augenblick deren Verkeilung in den Nuten dieser Führungen. A disadvantage of the known device is also their low efficiency caused by high frictional forces of the rollers in the grooves of the tapered guides, in particular, at the moment their wedging in the grooves of said guides.
  • Es ist eine Vorrichtung zum Einwalzen von Rohren bekannt, die ein Gehäuse und ein an diesem unter einem Winkel zu seiner geometrischen Längsachse angeordnetes Einwalzelement, das in Lagern an einem Zapfen montiert ist, enthält (SU, A, 394133). It is a device for rolling tubes are known which includes a housing and a at an angle arranged on this to its geometric longitudinal axis Einwalzelement which is mounted in bearings on a pin (SU, A, 394133).
  • Diese Vorrichtung ist nach ihrer konstruktiven Auslegung kompliziert, weist auf Grund hoher Reibkräfte im Bearbeitungsbereich einen niedrigen Wirkungsgrad auf, wodurch die von dem Einwalzelement her auf das Rohr zu übertragende Last verringert wird, und sie dient einzig und allein für das Einwalzen der Rohrenden. This device is complicated by their structural design, has due to high frictional forces in the processing area have a low efficiency, thereby being reduced from the Einwalzelement forth on the tube load to be transmitted, and it serves solely for the rolling of the pipe ends. Eine Vorrichtung gemäss Oberbegriff des Anspruchs 1 ist aus der US-A-2237538 bekannt. A device according to the preamble of claim 1 is known from US-A-2,237,538th
  • Diese Erfindung bezweckt eine Verbesserung der Betriebssicherheit der Vorrichtung zum Einwalzen von Rohren. This invention aims to improve the operational reliability of the apparatus for rolling of tubes.
  • Ein anderer Zweck der Erfindung ist es auch, die Lebensdauer der Vorrichtung zu verlängern. Another purpose of the invention, it is also possible to extend the life of the device.
  • Ein weiterer Zweck der Erfindung ist die Beschleunigung des Einwalzvorganges von Profil- bzw. gequetschten Rohren. Another purpose of the invention is the acceleration of the Einwalzvorganges of profile or crimped tubes.
  • Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Einwalzen von Rohren zu schaffen, deren Einwalzelement konstruktiv so ausgeführt ist, daß dadurch die Reibung im Bereich dessen Berührung mit dem Rohr im wesentlichen verringert und zugleich die darauf zu übertragende Last erhöht wird. The invention has for its object to provide a device for rolling tubes whose Einwalzelement is designed and constructed so that thereby reduces the friction in the region of its contact with the tube substantially at the same time and the subsequent load to be transmitted is increased.
  • Diese Aufgabe wird dadurch gelöst, daß das Einwalzelement als Kugelsegment ausgeführt ist, dessen Außenfläche durch untereinander abwechselnde Abschnitte einer Kugelfläche und Seitenflächen von Zylindern, deren geometrische Längsachsen in einer zur Zapfenachse senkrecht liegenden Ebene verlaufen, gebildet ist. This object is achieved in that the Einwalzelement is designed as a spherical segment whose outer surface is formed by one another alternating sections of a spherical surface and lateral surfaces of cylinders, the geometrical longitudinal axes extend in a plane perpendicular to the pin axis plane.
  • Die erfindungsgemäße Vorrichtung gestattet es, dank der genannten strömungsgünstigen Gestalt der Wirkfläche des Einwalzelementes die Reibung im Bereich dessen Berührung mit dem zu bearbeitenden Rohr erheblich zu verringern und die auf dieses zu übertragende Last wesentlich zu steigern, so daß die Einwalzgeschwindigkeit erhöht und die -qualität beachtlich verbessert werden. The inventive device makes it possible to reduce thanks to the said streamlined shape of the active surface of the Einwalzelementes the friction in the region of its contact with the pipe to be machined significantly and increase to be transmitted on this load significantly, so that the Einwalzgeschwindigkeit increased and the quality considerably be improved.
  • Kurze Beschreibung der Zeichnungen Brief Description of Drawings
  • Andere Ziele und Vorteile der Erfindung werden aus der nachstehenden detaillierten Beschreibung deren Ausrührungsbeispiels und den beigelegten Zeichnungen besser verstanden, in denen zeigt: Other objects and advantages of the invention will be better understood and its Ausrührungsbeispiels the annexed drawings, from the following detailed description, in which:
    • Fig. 1 die Gesamtansicht einer Vorrichtung beim Einwalzen eines Profilrohres im Bohrloch, Fig. 1 shows the overall view of an apparatus when rolling a profile tube in the borehole,
    • Fig. 2 dito mit einem Einwalzelement, das in einem Schnitt dargestellt ist, Fig. 2 ditto with a Einwalzelement, which is shown in section,
    • Fig. 3 eine Ansicht in Pfeiflichtung A der Fig. 1, Fig. 3 is a view in Pfeiflichtung A of Fig. 1,
    • Fig. 4 einen Schnitt nach der Linie IV-IV der Fig. 2 und Fig. 4 shows a section along the line IV-IV of FIG. 2 and
    • Fig. 5 einen Schnitt nach der Linie VV der Fig. 2. Fig. 5 shows a section according to the line VV of FIG. 2.
  • Die Vorrichtung zum Einwalzen von Rohren hat ein Gehäuse 1 (Fig. 1) mit einem Zapfen 2 (Fig. 2), an welchem ein Einwalzelement 3 angebracht ist. The apparatus for rolling of tubes has a housing 1 (FIG. 1) is attached with a pin 2 (Fig. 2) to which a Einwalzelement. 3 Der Zapfen 2 liegt in einem Winkel zur geometrischen Längsachse des Gehäuses 1, wobei das Einwalzelement 3 am Zapfen 2 in Kugellagern 4 und 5 montiert ist. The pin 2 is at an angle to the geometrical longitudinal axis of the housing 1, wherein the Einwalzelement 3 is mounted on the pin 2 in ball bearings 4 and 5. FIG. Für das Drücken eines Schmiermittels in die Lager 4, 5 weist das Einwalzelement 3 eine Bohrung 6 auf, die mit einer Schraube 7 geschlossen wird. For the pressing of a lubricant in the bearings 4, 5 3, the Einwalzelement a bore 6 which is closed with a screw. 7 Die Berührungsfläche des Zapfens 2 mit dem Einwalzelement 3 ist mittels einer Dichtung 8 abgedichtet. The contact surface of the pin 2 with the Einwalzelement 3 is sealed by a seal. 8
  • Das Einwalzelement 3 hat die Form eines Kugelsegmentes 9 (Fig. 1), dessen Außenfläche durch untereinander abwechselnde Abschnitte der Kugelfläche 10 (Fign. 1, 3) und Seitenflächen von Zylindern 11 gebildet ist, deren geometrische Achsen 12 in einer zur geometrischen Längsachse 13 des Zapfens 2 senkrechten Ebene (dh, unter 90°) liegen und den Mittelpunkt 0 durchlaufen, von welchem an das Kugelsegment 9 gebildet ist. The Einwalzelement 3 has the shape of a spherical segment 9 (Fig. 1), whose outer surface is formed by one another alternating sections of the spherical surface 10 (FIGS. 1, 3) and lateral surfaces of cylinders 11, whose geometrical axis 12 of the in the geometrical longitudinal axis 13 pin 2 vertical plane (ie, below 90 °) and are passed through the center point 0, which is formed by at the ball segment. 9 Der gemeinsame Schnittpunkt 14 (Fig. 3) der Seitenflächen der Zylinder 11 liegt an der Spitze des Einwalzelementes 3. The common intersection point 14 (Fig. 3) of the side surfaces of the cylinder 11 is located at the top of Einwalzelementes 3.
  • Es bieten sich mehrere Varianten (nicht gezeigt) für die Ausführung des Einwalzelementes 3 an: mit einer Versetzung der Achsen 12 um einen gewissen Abstand von der Achse 13 her des Einwalzelementes 3 in einer dazu senkrecht verlaufenden Ebene; There are several possible variants (not shown) for executing the Einwalzelementes 3 to: with a displacement of the axis 12 by a certain distance from the axis 13 of the forth Einwalzelementes 3 in a plane perpendicular thereto; mit einer Versetzung der Ebene mit den darin verlaufenden Achsen 12 unterhalb des Mittelpunktes 0 des Einwalzelementes 3; with a displacement of the plane containing the axes 12 extending therein below the center point 0 of the Einwalzelementes 3; Ausführung konkaver (hyperbolischer) Rotationsflächen anstelle der Zylinderflächen 11. Execution concave (hyperbolic) surfaces of rotation, instead of the cylindrical surfaces. 11
  • Die Vorrichtung wird wie folgt betrieben. The apparatus is operated as follows.
  • Nach dem Einfahren der Profilrohre 15 ins Bohrloch oder in die Futterrohrtour 16 (zur Abdeckung des Komplikationsbereiches), wie das in Fig. 1 erkennbar ist, und nach der Ausbesserung der Rohre 15 durch einen inneren Flüssigkeitsdruck bleiben noch längsverlaufende Falten 17 (Fig. 4) an ihrer Umfangslinie bestehen. After the retraction of the profile pipes into the borehole or in the casing string 16 15 remain (to cover the complication range), as is seen in Fig. 1, and after the repair of the tubes 15 by an internal fluid pressure is still longitudinally extending folds 17 (Fig. 4) exist on the peripheral line. Die Vorrichtung wird mit den Gestängerohren 18 (Fign. 1 und 2) zusammengeschraubt und ins Bohrloch bzw. die Futterrohrtour 16 eingefahren. The device is screwed together with the drill pipe 18 (FIGS. 1 and 2) and retracted into the borehole or the casing Tour 16. Das Einwalzelement 3 dringt dank der strömungsgünstigen Form seiner Wirkfläche ins Innere der Profilrohre 15 ein und glättet während der Drehung der Gestängerohre 18 die durch den Flüssigkeitsdruck nicht geglätteten Falten 17, wobei zugleich die gesamte Innenflache der Profilrohre 15 kalibriert wird und diese gegen die Bohrlochwandung bzw. die Futterrohrtour fest gedrückt werden (Fig. 5). The Einwalzelement 3 penetrates thanks to the streamlined form of its active surface into the interior of the profile tubes 15 and even during rotation of the drill pipes 18 are not smoothed by the liquid pressure folds 17, wherein at the same time the entire inner surface of the profile tubes is calibrated 15 and this against the borehole wall or the casing string are pressed tight (Fig. 5).
  • Diese Erfindung eignet sich für das Einwalzen von Profilrohren, die für die Abdeckung von Komplikationsbereichen im Bohrvorgang zum Einsatz gelangen, sowie für das Glätten von zerquetschten Futterrohren. This invention is suitable for the rolling of profile pipes which enter the coverage of areas of complication in the drilling operation is used, as well as for the smoothing of crushed liners.

Claims (1)

  1. Device for rolling in tubes, comprising a housing (1) and a roll-in element (3) which is arranged on the latter at an angle to its geometric longitudinal axis and is mounted in bearings (4, 5) on a spigot (2), characterized in that the roll-in element (3) is designed as a spherical segment (9), the outer surface of which is formed by alternating sections of a spherical surface (10) and lateral surfaces of cylinders (11), the geometrical longitudinal axes (12) of which extend in a plane perpendicular to the spigot axis (13).
EP19890902699 1988-11-22 1989-06-08 Pipe roller-expanding device Expired - Lifetime EP0397875B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/SU1988/000238 WO1990005831A1 (en) 1988-11-22 1988-11-22 Pipe roller-expanding device
CA 609485 CA1322151C (en) 1988-11-22 1989-08-25 Device for expanding pipes

Publications (3)

Publication Number Publication Date
EP0397875A1 true EP0397875A1 (en) 1990-11-22
EP0397875A4 true EP0397875A4 (en) 1992-01-08
EP0397875B1 true EP0397875B1 (en) 1994-02-16

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Application Number Title Priority Date Filing Date
EP19890902699 Expired - Lifetime EP0397875B1 (en) 1988-11-22 1989-06-08 Pipe roller-expanding device

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US (1) US5014779A (en)
EP (1) EP0397875B1 (en)
CA (1) CA1322151C (en)
DE (1) DE3887905D1 (en)
WO (1) WO1990005831A1 (en)

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Also Published As

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CA1322151C (en) 1993-09-14 grant
EP0397875A4 (en) 1992-01-08 application
EP0397875A1 (en) 1990-11-22 application
US5014779A (en) 1991-05-14 grant
WO1990005831A1 (en) 1990-05-31 application
DE3887905D1 (en) 1994-03-24 grant

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