EP0100259B1 - Verbindungsvorrichtung für Futter- oder Steigrohre, insbesondere zum Unterwasserbohren - Google Patents

Verbindungsvorrichtung für Futter- oder Steigrohre, insbesondere zum Unterwasserbohren Download PDF

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Publication number
EP0100259B1
EP0100259B1 EP83401399A EP83401399A EP0100259B1 EP 0100259 B1 EP0100259 B1 EP 0100259B1 EP 83401399 A EP83401399 A EP 83401399A EP 83401399 A EP83401399 A EP 83401399A EP 0100259 B1 EP0100259 B1 EP 0100259B1
Authority
EP
European Patent Office
Prior art keywords
piece
grooves
connecting piece
conical
tube
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.)
Expired
Application number
EP83401399A
Other languages
English (en)
French (fr)
Other versions
EP0100259A1 (de
Inventor
Philippe Nobileau
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.)
Vetco Inc
Original Assignee
Vetco Offshore Industries 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
Priority claimed from FR8211939A external-priority patent/FR2529991B1/fr
Application filed by Vetco Offshore Industries Inc filed Critical Vetco Offshore Industries Inc
Priority to AT83401399T priority Critical patent/ATE23602T1/de
Publication of EP0100259A1 publication Critical patent/EP0100259A1/de
Application granted granted Critical
Publication of EP0100259B1 publication Critical patent/EP0100259B1/de
Expired legal-status Critical Current

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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/043—Threaded with locking means
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/16—Connecting or disconnecting pipe couplings or joints
    • E21B19/161—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe
    • E21B19/163—Connecting or disconnecting pipe couplings or joints using a wrench or a spinner adapted to engage a circular section of pipe piston-cylinder actuated
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/02—Couplings; joints
    • E21B17/08—Casing joints
    • E21B17/085—Riser connections

Definitions

  • the invention relates to a device for quick connection of solid rods, tubes of any diameter and casings particularly suitable for assembling risers, casings even of large diameters for drilling at sea, and stacks of anchoring of oil platforms.
  • a high precision of the assemblies is thus necessary in order to prevent the risks of fatigue and rupture of assemblies which are insufficiently tight or liable to loosen.
  • connectors have been fitted with hydraulically assisted interlocking. However, since they cannot be disconnected, they can only be used in very specific cases.
  • Another embodiment consists in interrupting the steps of a circular threading or grooving on equidistant sectors, so as to make the connection by simple axial bringing together of the tubular elements then by rotation of a fraction of a turn of an element by compared to each other.
  • the connection is thus made on several series of portions of threads or grooves in the manner of a bayonet assembly.
  • the milling operations required by such a connector are very expensive.
  • the peripheral discontinuity of the assembly gives it limited mechanical characteristics.
  • the object of the invention is a device for quick connection of rods, tubes, casings and sections of anchor piles, in particular for drilling at sea, comprising a male part and a female part, of the type with helical grooves conical clamping.
  • each part is provided with a plurality n of grooves of constant profile and complementary to that carried by the other part, the apex of each of these grooves being, seen in axial section, rapidly offset from the hollow adjacent grooves with a value at least equal to the fraction 1 / n of the variation of the radius of the conical surface carrying said grooves on a helical pitch, and at most equal to the fraction 1.5 / n of this value VR.
  • the value (a) will be equal to the fraction 1 / n of the value (VR).
  • each of the grooves of the above-mentioned plurality is of sufficient length to cut at least twice a generatrix determined for each grooving of said conical surface.
  • the arrangement according to the invention has the same advantage as the connectors with bayonet assembly mentioned above, that is to say providing complete tightening by axial approximation followed by a rotation of a fraction of turn without having the disadvantage, namely the discontinuity of the distribution of forces in the connector, due to the presence of the sectors without threads.
  • the invention makes it possible to avoid expensive machining operations such as the necessary milling of the threaded couplings interrupted according to the prior art.
  • the invention also makes it possible to generate, at the end of tightening, a significant prestress in the assembly, making it possible to dispense with the use of positive locking devices for the parts together.
  • the implementation of these devices has the drawback of reducing, or even eliminating, the tightening preload and, thereby, reducing the resistance of the connection devices facing alternating forces.
  • the invention makes it possible to avoid the loss of these devices during the transport of the tubes or the connectors.
  • jacks which may also constitute connector locking members.
  • the female connection piece can serve as a means of tightening a tubular connection on a well head.
  • the male connection piece may be the well head which, for this purpose, has on its external conical part n threads or grooves.
  • the female connecting piece has on its inner surface, beyond the threads, a profile adapting to the tubular connection carrying the body of the jacks, the ends of their rods being connected to the female piece for its rotation.
  • each grooving can include a set of threads (at the top and bottom of the grooving) the variation in nominal diameter of which is identical.
  • the grooving can be a simple triangular or trapezoidal section thread. It will however be preferred that the sides of this grooving are such that the trace of the lower side for the male part and the upper side for the female part, in an axial plane, intersects the axis of the assembly mounted female part at the top, above its radial level.
  • connection device of FIGS. 1 to 4 comprises a female part 1 and a male part 2.
  • these parts are connected by means of four helical grooves designated 3, 4, 5 and 6 for the female part and 3 ', 4', 5 'and 6' for the male part.
  • each grooving of the part 1 consists of an inclined flank 10 connecting at its lower part to a flank 11 slightly inclined upwards in the direction of the axis and ending at its upper part with the inclined part 11 of another grooving by a small vertical portion 12.
  • Each groove is produced on a common conical surface 7 whose conicity is such that, in the radial plane of the figure, the apex 12 of each groove is offset radially relative to the hollow of the adjacent grooves by a value a at least equal to the fraction 1 / n of the variation in radius VR of the conical surface 7 along a helical pitch, n being the number of grooves used (here 4).
  • each grooving of the part 2 adapts to that of the grooves of the part 1, so that, during the simple axial displacement of the female part 1 relative to the male part 2, the grooves 3, 4, 5, 6 are applied by their side 10 on the corresponding side of the grooves 3 ', 4', 5 'and 6' of the male part 2, as shown in FIG. 2.
  • a tight contact is thus produced throughout each of the four threads, each extending over at least one complete revolution.
  • the assembly produced then has a homogeneous mechanical resistance over its entire surface, capable by the prestressing carried out of withstanding numerous operations - even flapping - without loosening.
  • a seal 8 has been shown in a groove in the part 2. At the end of the connection by rotation, the seal 8 slides on the vertical part 9 of the part 1.
  • FIGS. 5 and 6 we see two possible variants of grooves, one (FIG. 5) in the form of new trapezoidal threads, the other (FIG. 6) in the form of groups of threads 15, 16, 17, 18 evolving. on nominal helical surfaces 15 ′ ... offset radially under the same conditions as the grooving vertices of FIG. 4.
  • connection device can be very numerous and in particular to provide the connector function, that is to say a device that can be controlled remotely in the connection or disconnection direction.
  • FIGS. 7 and 8 show two connection devices, one composed of the multiple threaded pieces 24 and 25, the other of the multiple threaded pieces 26 and 27.
  • the female connection piece 26 can be made integral with a well head receptacle 28 or be incorporated into it by any known means.
  • the male part 27 surrounds the well head 25 and its lower end serves, after tightening and locking, as a stop for a flange 29 of the well head 25.
  • the upper part of the high pressure wellhead 25 comprises a multiple thread with 8 threads for example and is surrounded by the connecting piece 24.
  • This piece belongs to a set 30 and has a groove surrounding its multiple threads surrounding the flange 31 of the same assembly 30 serving as a hydraulic connector.
  • the assembly 30 also includes the flanges 32, 33, 34 and 35 used for fixing vertical axes, such as 36, for example supporting the cylinder bodies 37.
  • the rods 38 of these cylinders have their ends fixed to vertical axes, such as 39 adjoining the flanges 40 of the connection piece with multiple threads 24. It is therefore sufficient to order the jacks 37 so that the rods 38 cause the connection piece 24 to rotate by one eighth of tower.
  • connection device 24, 25 is held in tightness by the blocking produced by the control of the jacks 37. It is thus easy to repeat the connection and disconnection of the well head.
  • the tube 60 has for this purpose on its external upper part six threads, for example on which tighten six threads carried on the connecting piece 70.
  • This connecting piece like the piece 24 of the previous example already belongs to a set which is this time that of the lower part of the tube 80.
  • An extension 49 of the tube 60 without thread allows after tightening of the connecting piece 70 to be applied laterally against a sealing ring 50 disposed in a groove of a lower extension of the flange 42 of the tube 80 supporting the piece of connection 70.
  • the tubes 60 and 80 respectively have flanges 43 and 44 used for fixing the sleeves such as 45 for the passage of the guide lines 46.
  • connection device described can be applied to any rapid connection of tubular elements, the prestressing of the threads obtained at the end of tightening of the elements not being affected by the possible blocking connection when the latter is made necessary either during use involving a torque in the opposite direction to that of the tightening torque, or during use requiring high security against loosening.
  • connection between the connected parts by means of threads undergoing prestress at the end of tightening after a rotation of a fraction of a turn is suitable for the use of the connected parts. It follows that if it is necessary to separate and then reconnect tubes such as 60 and 80 by means of the connecting piece 70 can be used as connecting means between the tube 60 and the connector 70 the device shown figure 11.
  • the lever 55 secured to the yoke 51 rotating in its support 90 mounted on the connector 70 is located horizontally and on the side opposite the cleat 54 secured to the flange 43 of the tube 60.
  • a lever 52 rotating freely around the axis 56 carried by the yoke 51 is retained by the edge 53 of an extra thickness thereof. Under these conditions, the lever 52 is horizontal and opposite the lever 55.
  • the invention makes it possible, by a clever combination of the dimensions of the diameter of the connector, the thread pitch and the taper of the nominal surfaces, to preserve the self-locking characteristics of the connections by conventional thread and therefore to create prestresses. while retaining the advantages of a bayonet coupling.
  • the provisions of the invention also apply to the connection of solid rods in multiple applications and in particular to the constitution of anchoring piers for oil platforms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)

Claims (10)

1. Schnellverbindungsvorrichtung für Stangen, Ausbaurohre oder Abschnitte von Verankerungssäulen, insbesondere zur Bohrung im Meer, mit einem Einsteckelement (2) und einem Aufnahmeelement (1) mit schraubenförmigen Nuten für ein konisches Anziehen, dadurch gekennzeichnet, dass jedes Element mit einer Anzahl (n) schraubenförmiger Nuten (3, 4, 5, 6 ; 3', 4', 5', 6') versehen ist, die ein konstantes Profil aufweisen, das komplementär zu jenem des jeweils anderen Elementes ist und dass jeder Nutenscheitel, gesehen im axialen Schnitt, radial gegenüber den Nutenhöhen benachbarter Nuten um einen Wert (a) versetzt ist, der mindestens so gross wie 1/n der Radiusänderung (VR) für eine Schraubensteigung der Konusfläche (7) ist, die die Nuten aufweist und höchstens so gross wie 1,5/n dieser Radiusänderung (VR).
2. Schnellverbindungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass der Wert (a) gleich gross wie 1/n der Radiusänderung (VR) ist.
3. Schnellverbindungsvorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Länge jeder Nut (3-6, 3'-6') mindestens zweimal eine vorgegebene Erzeugende der Konusfläche (7) schneidet.
4. Schnellverbindungsvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Spur (11) der oberen Flanke der Nuten des Aufnahmeelementes (1, 11') und der unteren Flanke der Nuten des Einsteckelementes (2), gesehen in einer Axialebene, nach oben in Richtung zur Achse der Anordnung geneigt ist, wenn das Aufnahmeelement (1) das obere Element der Anordnung bildet.
5. Schnellverbindungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eines der Elemente (25) Mehrfachgänge aufweist, die von einer Konusfläche eines ersten Rohres (25) getragen werden, während das andere Verbindungselement (24) von einem Flansch (31) getragen wird, der zu einem zweiten Rohr (30) gehört.
6. Schnellverbindungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das vom Flansch (31) des zweiten Rohres (30) getragene Verbindungselement (24) mit dem anderen Rohr (30) durch Hubzylinder (37) derart verbunden ist, dass ihre Betätigung eine Drehung des Verbindungselementes (24) veranlasst.
7. Schnellverbindungsvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass eines der Verbindungselemente (26), das auf einem Aufnehmer eines Bohrkopfs (28) befestigt ist, unterhalb seines mit Mehrfachgängen ausgestatteten Konusabschnittes eine zylindrische Führungsfläche eines Flansches (29) des Bohrkopfs (25) aufweist.
8. Schnellverbindungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, dass das andere Verbindungselement (27) an der seinen konischen Mehrfachgängen. entgegengesetzten Seite eine zylindrische Führungsfläche des Bohrkopfs (25) aufweist, und dass das untere Ende des Verbindungselementes (27) in Anlage mit dem Flansch (29) steht, während sein Anziehen durch Drehung in den Gängen des ersten Verbindungselementes (26) erfolgt.
9. Schnellverbindungsvorrichtung nach Anspruch 5, dadurch gekennzeichnet, dass das erste Rohr (60), das Träger einer konischen Mehrfachganganordnung ist, sich in einen Abschnitt ohne Gänge (49) verlängert, der sich während des Anziehens des Verbindungselementes (70) mit konischen Mehrfachgängen unter den Flansch (42) setzt, der das Verbindungselement (70) des zweiten Rohres (80) trägt, und dass das erste und das zweite Rohr (60, 80) fest mit zusätzlichen Flanschen (43, 44) zur Befestigung von Muffen (45) einer Führungsleitung (46) verbunden sind, wobei eine der Muffen eine Nut (47) zur Aufnahme einer Nase (48) des Verbindungselementes (70) nach dem Anziehen aufweist.
10. Schnellverbindungsvorrichtung nach Anspruch 1, gekennzeichnet durch eine Verriegelungsvorrichtung für die miteinander vereinigten Verbindungselemente (60, 70) durch axialen Kontakt und Drehung um einen Bruchteil einer Umdrehung, die durch eine Kappe (51) gebildet wird, die auf einem fest mit dem Rohr (60) verbundenen Halter (90) befestigt ist, durch einen fest mit dem Rohr (60) verbundenen Anschlag (54), sowie einen Hebel (52), der um eine von der Kappe (51) getragene Achse (56) schwenkbar angeordnet und bezüglich der Achse der Kappe (51) exzentrisch angeordnet ist und der während der Drehung des Kappe, die durch einen Hebel (55) betätigt wird, den Angriff des Hebels (52) am Anschlag (54) herbeiführt, sowie eine Blockierung durch Reibung des Umfangs der Kappe (51) an ihrem Halter (90).
EP83401399A 1982-07-07 1983-07-07 Verbindungsvorrichtung für Futter- oder Steigrohre, insbesondere zum Unterwasserbohren Expired EP0100259B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83401399T ATE23602T1 (de) 1982-07-07 1983-07-07 Verbindungsvorrichtung fuer futter- oder steigrohre, insbesondere zum unterwasserbohren.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR8211939A FR2529991B1 (de) 1982-07-07 1982-07-07
FR8211939 1982-07-07
FR8213381 1982-07-20
FR8213381 1982-07-30

Publications (2)

Publication Number Publication Date
EP0100259A1 EP0100259A1 (de) 1984-02-08
EP0100259B1 true EP0100259B1 (de) 1986-11-12

Family

ID=26222981

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83401399A Expired EP0100259B1 (de) 1982-07-07 1983-07-07 Verbindungsvorrichtung für Futter- oder Steigrohre, insbesondere zum Unterwasserbohren

Country Status (11)

Country Link
EP (1) EP0100259B1 (de)
JP (1) JPS5923180A (de)
KR (1) KR840005516A (de)
AU (1) AU560764B2 (de)
BR (1) BR8303617A (de)
CA (1) CA1207657A (de)
DE (1) DE3367649D1 (de)
DK (1) DK312983A (de)
ES (1) ES8403594A1 (de)
NO (1) NO161987C (de)
OA (1) OA07484A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2757481C1 (ru) * 2020-10-13 2021-10-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Разъединитель бурильной колонны
RU2807169C1 (ru) * 2023-03-10 2023-11-10 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Разъединитель эксплуатационной колонны

Families Citing this family (11)

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US4610467A (en) * 1981-07-06 1986-09-09 Dril-Quip, Inc. Connector
JPH0695824B2 (ja) * 1985-01-14 1994-11-24 株式会社日立製作所 磁石式直流機の固定子
JPS61126779U (de) * 1985-01-24 1986-08-08
DE3513347C1 (en) * 1985-04-13 1987-01-02 Karl Burgsmueller Conical, multi-start threaded connection for fastening parts of a deep-drilling tool
DE3673875D1 (de) * 1985-06-06 1990-10-11 Nippon Denso Co Magnetlaeufer.
US4757593A (en) * 1986-03-20 1988-07-19 Vetco Gray Inc Method of locking a connector
US4846508A (en) * 1987-12-16 1989-07-11 Vetco Gray Inc. Tubular connector system
GB2220716B (en) * 1988-06-17 1992-06-03 Vetco Gray U K Limited An indicator system for threaded connections
FR2749369B1 (fr) * 1996-06-03 1998-09-04 Domine Sa Dispositif de connexion rapide de tubes
CN102733763B (zh) * 2012-06-16 2014-10-08 无锡西姆莱斯石油专用管制造有限公司 高抗挤特殊螺纹套管连接接头
CN120312155B (zh) * 2025-05-07 2026-01-30 江苏亿德隆石油机械有限公司 一种采油井口套管头

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US2885225A (en) * 1955-02-17 1959-05-05 Drilco Oil Tools Inc Drill pipe coupling having particular thread formations

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DE628915C (de) * 1931-12-23 1936-04-18 Spang Chalfant & Co Inc Gewindeverbindung fuer Rohre
DE701558C (de) * 1935-02-19 1941-01-18 Chalfant And Co Inc Schraubverbindung der Futterrohre fuer Tiefbohrloecher
US2215770A (en) * 1939-09-29 1940-09-24 William F Sheffield Drilling shaft coupling
US2587544A (en) * 1948-06-01 1952-02-26 United States Steel Corp Threaded joint capable of being quickly made and broken
GB804798A (en) * 1954-05-11 1958-11-26 Joy Mfg Co Screwing-up and unscrewing mechanism for an oil well drill pipe
US3086796A (en) * 1958-11-13 1963-04-23 Fmc Corp Pipe coupling with wedging locking means
GB897572A (en) * 1959-05-20 1962-05-30 Dowty Rotol Ltd Improvements relating to a unit for tightening and loosening a screwed pipe joint inearth boring equipment
US3129963A (en) * 1960-06-30 1964-04-21 Robbins Machine & Mfg Co Low release torque threaded joint
BE633562A (de) * 1962-06-26
CH479017A (de) * 1968-12-09 1969-09-30 Naamanka Armas Anordnung zum Anschliessen von zwei Schläuchen oder Rohren aneinander
US4043575A (en) * 1975-11-03 1977-08-23 The Rucker Company Riser connector
GB2064041B (en) * 1979-11-19 1983-07-27 Hunting Oilfield Services Ltd Pipe connectors

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
US2885225A (en) * 1955-02-17 1959-05-05 Drilco Oil Tools Inc Drill pipe coupling having particular thread formations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2757481C1 (ru) * 2020-10-13 2021-10-18 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Разъединитель бурильной колонны
RU2807169C1 (ru) * 2023-03-10 2023-11-10 Федеральное государственное бюджетное образовательное учреждение высшего образования "Тюменский индустриальный университет" (ТИУ) Разъединитель эксплуатационной колонны

Also Published As

Publication number Publication date
NO161987C (no) 1989-10-18
EP0100259A1 (de) 1984-02-08
JPS5923180A (ja) 1984-02-06
ES523882A0 (es) 1984-04-01
ES8403594A1 (es) 1984-04-01
NO161987B (no) 1989-07-10
BR8303617A (pt) 1984-02-14
OA07484A (fr) 1984-12-31
DK312983A (da) 1984-01-08
DE3367649D1 (en) 1987-01-02
KR840005516A (ko) 1984-11-14
CA1207657A (en) 1986-07-15
NO832449L (no) 1984-01-09
AU1661483A (en) 1984-02-09
AU560764B2 (en) 1987-04-16
DK312983D0 (da) 1983-07-06

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