EP0061473A1 - Systeme de manipulation de tuyaux. - Google Patents

Systeme de manipulation de tuyaux.

Info

Publication number
EP0061473A1
EP0061473A1 EP81902672A EP81902672A EP0061473A1 EP 0061473 A1 EP0061473 A1 EP 0061473A1 EP 81902672 A EP81902672 A EP 81902672A EP 81902672 A EP81902672 A EP 81902672A EP 0061473 A1 EP0061473 A1 EP 0061473A1
Authority
EP
European Patent Office
Prior art keywords
trough
elongated
movable
pipe
pivotal
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
EP81902672A
Other languages
German (de)
English (en)
Other versions
EP0061473B1 (fr
EP0061473A4 (fr
Inventor
Troy Dale Cain
Robert Frias
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.)
Ingram Corp
Original Assignee
Ingram Corp
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 US06/185,726 external-priority patent/US4382738A/en
Application filed by Ingram Corp filed Critical Ingram Corp
Publication of EP0061473A1 publication Critical patent/EP0061473A1/fr
Publication of EP0061473A4 publication Critical patent/EP0061473A4/fr
Application granted granted Critical
Publication of EP0061473B1 publication Critical patent/EP0061473B1/fr
Expired legal-status Critical Current

Links

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
    • E21B19/14—Racks, ramps, troughs or bins, for holding the lengths of rod singly or connected; Handling between storage place and borehole
    • E21B19/15—Racking of rods in horizontal position; Handling between horizontal and vertical position

Definitions

  • Figure 1 is a perspective view of a pipe handling apparatus with the pipe transfer system of the present invention located on one side of the apparatus next to a pipe rack.
  • Figure 2 is a side view of the pipe transfer system of Figure 1.
  • Figure 3 is an enlarged end view of the tilting mechanism for the stacking and unstacking trough of the pipe transfer system of Figures 1 and 2.
  • Figure 4 is an enlarged side view of the tilting mechanism for the stacking and unstacking trough of the pipe transfer system of Figures 1 and 2.
  • Figure 5 is an end view of the pipe transfer system of Figures 1 and 2 with its stacking and unstacking trough shown at different elevations and positions.
  • Figure 6 illustrates a hydraulic system for operating the pipe transfer system of Figures 1-5.
  • Figure 7 is a top view of the vertical, pivoted trough of the pipe handling apparatus of Figure 1.
  • Figure 8 is a side view of the vertically pivoted trough of the pipe handling apparatus of Figure 1.
  • Figure 9 is a side view of the vertically pivoted trough of the pipe handling apparatus of Figure 1 showing the trough pivoted to an inclined position by hydraulic cylinders.
  • Figure 10 is a cross-section of Figure 8 taken along the lines 10-10 thereof.
  • Figure 11 is a cross-section of Figure 8 taken along the lines 11-11 thereof.
  • Figure 12 is a cross-section of Figure 8 taken along the lines 12-12 thereof.
  • Figure 13 is a cross-section of Figure 8 taken along the lines 13-13 thereof.
  • Figure 14 is a top view of a slidable apron attachable to the pipe moving device of the pipe handling apparatus of Figure 1.
  • Figure 15 is a side view of the apron and pipe moving device of Figure 14.
  • Figure 16 is an end view of the pipe moving device of Figures 14 and 15.
  • the pipe handling apparatus 21 for raising pipe P such as casing, drill pipe, collars, or tubing up to a derrick floor 25 of a drilling rig (not shown) and for removing the pipe P from the derrick floor 25.
  • the pipe P is stored in racks 27 on both sides of the apparatus 21.
  • the apparatus 21 comprises an elongated frame 29 which supports a trough 31 which may be pivoted upward to an inclined position in alignment with a fixed trough 33 as shown in Figures 1 and 9 or downward to a horizontal position as shown in Figures 5 and 10-13. Hydraulic cylinders 34 sre provided for pivoting the trough 31 upward or downward.
  • the cylinders are pivotally attached to the frame 29 and their pistons are pivotally attached to the trough 31.
  • the rear end of the trough 31 is pivotally coupled to the frame 29 at 35.
  • the fixed trough 33 is supported in an inclined position by the derrick floor 25 and support structure 36.
  • the trough 31 comprises elongated frame members 37A-37D which support a V-shaped floor 39 along which the pipe P slides.
  • An intermediate portion 39A of the V-shaped floor 39 is tiltable laterally in either direction when the trough 31 is horizontal, to dump pipe on either side of the apparatus 21 for storage in the racks 27.
  • the intermediate position 39A is tiltable by hydraulic cylinders 41.
  • the cylinders 41 have their lower ends pivotally coupled to structure 43 which is connected to frame members 37A and 373 and their pistons 41A pivotally coupled to the intermediate portion 39A.
  • Figure 12 illustrates the intermediate portion 39A being tilted laterally to the left.
  • the cylinders 49 move up and down with the trough 31 as it is pivoted up and down.
  • a movable member 49 driven by an endless chain 51 for movement along trough 31 in either direction between its ends 31A and 31B.
  • the bottom 53 of the movable member 49 is V-shaped and slides along the floor 39.
  • the bottom of the floor 39 has an elongated slot 53 formed therethrough.
  • a lug 55 having a thin neck 56 extends from the bottom of the movable member 49. The neck 56 extends through the slot 53 and the lug 55 is connected to the chain 51 below the floor 39.
  • Means, not shown, is provided for driving the chain 51 in either direction.
  • the trough 31 is located in its horizontal position and the movable member 49 is located at the rear end 31A of the trough 31.
  • a length of pipe is transferred from one of the racks 27 into the trough 31 where it rests on the V-shaped floor 39.
  • Trough 31 next is pivoted upward to be in alignment with the fixed trough 33.
  • the endless chain 51 is driven to move member 49 up the trough 31 to its end 31B.
  • the front end 49A of member 49 engages the lower end of the pipe P and pushes the pipe P upward in the troughs 31 and 33 until the pipe overlies the derrick floor.
  • the pipe then is lifted into the derrick by cable hoists and/or elevators.
  • the member 49 is retracted to the rear end 31A of the trough 31; the trough 31 is lowered to a horizontal position; and the process is repeated.
  • the trough 31 In moving pipe downward from the derrick floor 25, the trough 31 is raised to be in alignment with the fixed trough 33 and member 49 moved to an upward position along trough 31.
  • the cable hoist locates a length of pipe in troughs 33 and 31 and member 49 is moved downward to the lower end of trough 31 to allow the pipe to slide downward in the trough 31 to position the pipe on the intermediate portion 39A of the floor 39.
  • the trough 31 then is lowered to a horizontal position and intermediate position 39A is tilted laterally to dump the pipe on either side of the apparatus 21 for storage in one of the racks 27.
  • the pipe transfer system for transferring pipe between the racks 27 and the pipe handling apparatus 21 comprises a pair of aligned arms 61 and 63 located on the side of the pipe handling apparatus 21 and next to one of the pipe racks 27.
  • one pair of arms 61 and 63 are shown on the right of the apparatus 21 next to the right rack 27.
  • the ends 61A and 63A of arms 61 and 63 are pivotally coupled to the frame 29 at 65 and 67.
  • the opposite ends 61B and 63B of arms 61 and 63 may move to an upper position above the catwalk 69 and to a lower position below the catwalk 69 as shown in Figures 1, 2, and 5.
  • the arms 61 and 63 are shown in dashed form in their upper positions.
  • a hydraulic system is employed for moving the ends 6IB and 63B of arms 61 and 63 together to upward or downward positions or to any level in between.
  • the hydraulic system comprises a pair of cylinders 71 and 73 having their ends pivotally coupled to the frame 29 at 75 and 77.
  • the pistons 81 and 83 of the cylinders 71 and 73 are pivotally coupled to arms 61 and 63.
  • the pistons 81 and 83 are shown pivotally coupled at 85 and 87 to ears 89 and 91 which are connected to arms 61 and 63 respectively.
  • the hydraulic system for operating the cylinders 71 and 73 comprises an oil reservoir 93, a pump 95, a four-way directional control valve 97 and appropriate flow lines.
  • a stacking and unstacking trough 101 for carrying pipe between the rack 21 and the pipe handling apparatus 21.
  • the trough 101 can be pivoted laterally in either direction to allow pipe to be loaded onto and from the trough 101.
  • Tilting mechanisms 103 and 105 are provided at each end of the trough 101.
  • the ends 61B and 63B of arms 61 and 63 have lugs 107 and 108 secured thereto respectively and which extend laterally outward.
  • the lugs 107 and 108 are rotatably coupled to tilting mechanisms 103 and 105 respectively allowing the arms 61 and 63 to move up or down together carrying the length of the trough 101 in a horizontal position.
  • tilting mechanisms 103 and 105 is the same.
  • Tilting mechanism 103 will be described in detail.
  • the lug 107 is rotatably located in an aperture 109 formed through a bearing member 111.
  • Member 111 is rotatably mounted on an upper shaft 113 which is supported by two mounts 115 and 117 fixedly secured to the trough 101.
  • the shaft 113 freely extends through apertures 115A and 117A formed through mounts 115 and 117 and through aperture 111A formed through member 111 whereby the mounts 115 and 117 can rotate about the shaft 113 and the shaft 113 can rotate relative to member 111.
  • a rotary actuator 121 is fixedly secured to the trough 191 by way of a plate 123 which is secured to the actuator 121 and to the trough 101.
  • the actuator 121 has a lower shaft 125 which can be rotated in opposite directions.
  • the lower shaft 125 is fixedly secured to a linkage 127 which is coupled to the shaft 113.
  • the linkage 127 has an aperture 127A which freely receives the shaft 113 whereby the linkage can rotate about the shaft 113.
  • the linkage 127 When the actuator 121 rotates its shaft 125 in one direction, the linkage 127 is rotated causing the linkage to turn about the shaft 113 and hence tilt the actuator 121 and the trough 101.
  • the trough 101 is shown in dotted lines tilted laterally in opposite directions. In Figure 3, the actuator 121 is not shown tilting with the trough for purposes of clarity.
  • the rotary actuator 121 is a commercially available actuator hydraulically actuated. Referring to Figure 6, it comprises a cylinder 129 having two pistons 131 and 133, with a rack 135 connected between the pistons. The rack 133 engages a pinion 139. The shaft 125 is an extension of the pinion 139. When pressure is imposed on one side of the cylinder 129 it drives the piston and the rack in one direction to rotate the pinion 139 and hence the shaft 125. On the opposite side of the cylinder the pressure is released.
  • member 140 is the cylinder for the rotary actuator 141 for the tilting mechanism 105. Actuator 141 is the same as actuator 121.
  • the cylinder 140 has two pistons 142 and 143 and a rack 145 connected between the pistons for rotating a pinion 146 from which extends a shaft similar to shaft 107.
  • Both actuators of mechanisms 103 and 105 are operated simultaneously by hydraulic fluid from reservoir 93 and pump 95 for driving their shafts in the same direction for tilting the trough 101.
  • Four way valve 143 is employed for controlling the direction in which the two actuators 121 and 141 rotate their shafts and hence the direction in which the trough 121 is tilted.
  • the arms 61 and 63 and trough 101 operate in the following manner to transfer pipe between the rack 27 and the pipe handling apparatus 21. Assume that pipe is to be transferred from apparatus 21 upward to the rack 27.
  • the arms 61 and 63 will be located such that the trough 101 will be just below the catwalk 69 in a non-tilted position whereby the V of the trough 101 will be straight up. In this position, the upper edge of the trough 101 is located close to the catwalk 69 with very little space between the trough edge and the catwalk 69 such that pipe rolling outward on the catwalk 69 will roll into the trough 101.
  • the intermediate position 39A of the floor 39 of the trough 31 is tilted laterally to dump a length of pipe onto the catwalk 69.
  • the pipe will roll into the trough 101.
  • the arms 61 and 63 then are raised simultaneously to raise the trough 101 with the trough held in a non-tilted position.
  • As the trough is raised, its length will be held horizontal.
  • the trough thus will cradle and carry the pipe upward with no longitudinal movement of the pipe in the trough 101.
  • the pipe cannot roll off of the trough, nor can it slide off of the trough longitudinally.
  • the arms 61 and 63 and trough 101 operate in the following manner. Assume that pipe is to be transferred from an upper row of pipe on the rack 27 to the pipe handling apparatus 21. The arms 61 and 63 will be located such that the trough 101 will be just below the top row of the pipe on the rack 27 with the trough 101 in a non- tilted position whereby the V of the trough 101 will be straight up. A length of pipe will be pushed into the trough 101. The arms 61 and 63 will then be lowered simultaneously with the trough 101 carrying the length of pipe downward in a horizontal position.
  • a pair of arms 61 and 63 and a laterally tiltable trough 101 as described above will be located on both sides of the apparatus 21 for transferring pipe between either rack 27 and the apparatus 21.
  • slidable apron 151 removably attachable to the pipe moving device 49 of the pipe handling apparatus 21 for carrying pipe from the derrick floor 25 down the troughs 33 and 31 when there is little or no height differential between the derrick floor 25 and the frame 29 of the pipe handling apparatus 21.
  • the apron 151 comprises a V-shaped member slidable on the floor 39 of the trough 31.
  • An aperture 153 is formed close to the rear end 151A of the apron 151 into which is fitted a triangular shaped securing member 155 which projects upward from a forward extension of the neck 56 of member 49.
  • the aperture 153 does not extend all of the way to the rear end 151A of the apron 151 but is spaced therefrom a short distance.
  • the member 153 slants downward toward its forward end whereby the member 155 may be inserted into the aperture 153 by moving the member 49 forward while the apron 151 will ride upward on the member 155 as it moves forward until it reaches full length of the aperture 153 at which time the apron will drop down with the member 155 located in the aperture 153.
  • the member 49 When the member 49 is moved forward by the chain, its front end 49A will engage the rear end 151A of the apron and push the apron 151 forward along the trough 31. For drawing pipe from the derrick floor, the apron 151 will be pushed onto the fixed trough 33. A length of pipe will be loaded onto the apron 151 and the member 49 will be moved backward by the chain 51 pulling the apron 151 and hence the pipe backward whereby the pipe may be loaded onto the rack 27. When the member 49 moves backward the rear end 155A of the member 155 engages the rear end 153B of the aperture 153, pulling the apron 151 backward.
  • the intermediate or dump portion 39A of the floor 39 of the trough 31 has two elongated apron holding strips 161 and 163 formed along its top outer edges.
  • the outer edges 151B and 151C of the apron slide under the strips 161 and 163 whereby the apron is held to the intermediate or dump portion 39A.
  • the apron 151 also will be tilted laterally allowing the pipe to be dumped onto the catwalk 69 for loading onto a rack 27 next to the apparatus 21.
  • member 49 will not be located above the dump portion 39A.
  • the apron 151 is tilted laterally by the dump portion 39A, its aperture 153 is moved above the member 155.
  • the aperture 153 will fit around the member 155 whereby the movable member 49 may push the apron along the trough 31 to the fixed trough 33.
  • the apron 151 is used primarily for drawing pipe from the derrick floor for loading on the rack, it is to be understood that it could be used for moving pipe from the rack 27 to the derrick floor.
  • the apron 151 also has advantages in that it protects the main troughs 31 and 33 from wear. A teflon like coating may be applied to the underside of the apron 151 to minimize friction.
  • the apron 151 may be removed as well as the securing member 155.
  • Member 155 may be removably secured to the forward extension of the neck 56 of member 49 by bolts.
  • the apron 151 may have a thin neck extending down from its bottom with an enlarged lug attached to the thin neck. The thin neck will extend through the slot 53 with the enlarged lug located below the floor 39. This arrangement allows the apron 151 to slide on the floor 39 yet holds the apron 151 to the dump portion when it is tilted for dumping purposes.
  • the apron 151 may be coupled to the member 49 by securing member 155 to the forward extension of the neck 56 of member 49 through the aperture 153 of the apron 151 when the aperture 153 of the apron 151 is over the forward extension of the neck.
  • the apron 151 may be removed by removing member 155 and by sliding the apron forward when the trough 31 is at a slightly inclined position to remove the lower thin neck of the apron from the slot 53 at the forward end of the trough 31.
  • the apron 151 will be longer than the length of pipe it will carry.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Warehouses Or Storage Devices (AREA)
  • Specific Conveyance Elements (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Domestic Plumbing Installations (AREA)
  • Stacking Of Articles And Auxiliary Devices (AREA)
  • Branching, Merging, And Special Transfer Between Conveyors (AREA)

Abstract

Systeme de transfert lateral de longueurs de tuyaux entre un ratelier et un appareil de manipulation de tuyaux. Le systeme comprend deux bras ecartes (61, 63) situes sur un cote de l'appareil de manipulation de tuyaux a proximite du ratelier (27). Chacun des bras presente une extremite liee de facon pivotante a un support (29) de telle sorte que son extremite opposee puisse se deplacer vers le haut et vers le bas. Les deux bras sont situes dans un meme plan et sont animes d'un mouvement de pivotement autour d'axes generalement paralleles. Une rigole (101) susceptible de supporter une longueur de tuyaux est reliee de facon pivotante a chacun des bras par leurs extremites opposees de telle facon que cette rigole se deplace vers le haut et vers le bas en meme temps que les extremites opposees des bras. Des mecanismes (103, 105) sont prevus pour incliner la rigole lateralement dans des directions opposees. De plus des cylindres (71, 73) sont prevus pour faire pivoter les bras autour de leurs axes respectifs afin de deplacer la rigole vers le haut ou vers la bas en meme temps que les extremites opposees des bras. Une rigole allongee (151) est disposee de facon coulissante dans une rigole pivotant dans un plan vertical (31) pour porter un tube depuis le plancher d'un derrick (25) jusqu a un ratelier (27) lorsque la difference de niveau entre le plancher du derrick et le ratelier est faible ou inexistante. La rigole glissante peut etre enlevee lorsque la difference de niveau est telle que le tuyau pourra glisser dans la rigole pivotant dans un plan vertical par gravite.
EP81902672A 1980-09-10 1981-09-10 Systeme de manipulation de tuyaux Expired EP0061473B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US18572780A 1980-09-10 1980-09-10
US185726 1980-09-10
US06/185,726 US4382738A (en) 1980-02-27 1980-09-10 Pipe handling system
US185727 1980-09-10

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP84111355.8 Division-Into 1984-09-24

Publications (3)

Publication Number Publication Date
EP0061473A1 true EP0061473A1 (fr) 1982-10-06
EP0061473A4 EP0061473A4 (fr) 1983-02-09
EP0061473B1 EP0061473B1 (fr) 1986-01-29

Family

ID=26881410

Family Applications (3)

Application Number Title Priority Date Filing Date
EP81902673A Expired EP0060295B1 (fr) 1980-09-10 1981-09-10 Appareil de manipulation de tubes
EP84111355A Withdrawn EP0139237A1 (fr) 1980-09-10 1981-09-10 Dispositif pour le transfer de tuyaux
EP81902672A Expired EP0061473B1 (fr) 1980-09-10 1981-09-10 Systeme de manipulation de tuyaux

Family Applications Before (2)

Application Number Title Priority Date Filing Date
EP81902673A Expired EP0060295B1 (fr) 1980-09-10 1981-09-10 Appareil de manipulation de tubes
EP84111355A Withdrawn EP0139237A1 (fr) 1980-09-10 1981-09-10 Dispositif pour le transfer de tuyaux

Country Status (12)

Country Link
EP (3) EP0060295B1 (fr)
JP (2) JPH0256473B2 (fr)
BR (2) BR8108783A (fr)
CA (1) CA1167833A (fr)
DE (2) DE3152304A1 (fr)
DK (2) DK207582A (fr)
GB (9) GB2093507B (fr)
MX (1) MX153783A (fr)
NL (2) NL8120358A (fr)
NO (2) NO160669C (fr)
SE (2) SE452492B (fr)
WO (2) WO1982000852A1 (fr)

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US10422192B2 (en) 2014-07-15 2019-09-24 Warrior Rig Technologies Limited Pipe handling apparatus and methods

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GB2158132B (en) * 1985-05-20 1986-12-31 Ingram Corp Pipe handling machine
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US7021880B2 (en) * 2003-04-18 2006-04-04 Pipe Wranglers Canada (2004) Inc. Pipe handling apparatus for presenting sections of pipe to a derrick work floor having a high-speed carriage assembly
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RU2303120C1 (ru) * 2005-12-19 2007-07-20 Открытое акционерное общество "Центральное конструкторское бюро "Коралл" Устройство для хранения и перегрузки бурильных и обсадных труб
US7802636B2 (en) 2007-02-23 2010-09-28 Atwood Oceanics, Inc. Simultaneous tubular handling system and method
WO2011011888A1 (fr) * 2009-07-29 2011-02-03 Markwater International B.V. Appareil et procédé de manipulation de tube
US8215888B2 (en) 2009-10-16 2012-07-10 Friede Goldman United, Ltd. Cartridge tubular handling system
CN104165031B (zh) * 2014-08-12 2016-10-19 四川准达科技有限责任公司 钻机自动装卸钻杆装置
CN104675339B (zh) * 2015-03-15 2017-02-22 河北百冠钻井设备有限公司 一种钻机钻杆自动输送系统
CN110436188B (zh) * 2019-07-05 2024-05-17 安徽韩华建材科技股份有限公司 一种复合地板转移装置
CN114562222B (zh) * 2022-03-11 2025-05-09 吉林石油装备技术工程服务有限公司 旋转式顶驱作业机一体化装置

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
US10422192B2 (en) 2014-07-15 2019-09-24 Warrior Rig Technologies Limited Pipe handling apparatus and methods

Also Published As

Publication number Publication date
EP0060295A1 (fr) 1982-09-22
GB2152114A (en) 1985-07-31
GB8504058D0 (en) 1985-03-20
DE3152309A1 (de) 1982-11-04
EP0061473B1 (fr) 1986-01-29
DK207582A (da) 1982-05-10
GB2137264A (en) 1984-10-03
NO160669C (no) 1989-05-16
GB2093507B (en) 1985-02-27
GB2093508A (en) 1982-09-02
EP0060295B1 (fr) 1986-01-08
GB8504061D0 (en) 1985-03-20
GB2152112B (en) 1986-10-29
JPS57501637A (fr) 1982-09-09
SE452492B (sv) 1987-11-30
NO159199B (no) 1988-08-29
BR8108783A (pt) 1982-07-13
CA1167833A (fr) 1984-05-22
JPS57501638A (fr) 1982-09-09
GB2152115B (en) 1986-04-30
DK207682A (da) 1982-05-10
GB8504057D0 (en) 1985-03-20
GB2152113B (en) 1986-10-22
NL8120357A (nl) 1982-08-02
NO821479L (no) 1982-05-05
NO821511L (no) 1982-05-07
GB2137264B (en) 1985-09-25
GB8409801D0 (en) 1984-05-23
GB2152112A (en) 1985-07-31
GB8410009D0 (en) 1984-05-31
BR8108785A (pt) 1982-07-13
GB2152113A (en) 1985-07-31
NO159199C (no) 1988-12-07
NO160669B (no) 1989-02-06
SE8202887L (sv) 1982-05-07
WO1982000853A1 (fr) 1982-03-18
GB2093507A (en) 1982-09-02
SE8202888L (sv) 1982-05-07
GB2138471B (en) 1985-05-22
GB8504060D0 (en) 1985-03-20
GB2138471A (en) 1984-10-24
GB2152111B (en) 1986-10-29
EP0139237A1 (fr) 1985-05-02
JPH0256473B2 (fr) 1990-11-30
GB8504059D0 (en) 1985-03-20
NL8120358A (fr) 1982-08-02
GB2152111A (en) 1985-07-31
GB2152115A (en) 1985-07-31
EP0060295A4 (fr) 1983-02-09
WO1982000852A1 (fr) 1982-03-18
GB2152114B (en) 1986-04-16
GB2093508B (en) 1985-09-18
DE3152304A1 (de) 1982-11-04
EP0061473A4 (fr) 1983-02-09
MX153783A (es) 1987-01-09

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