WO1994004788A1 - Elevateur permettant de remonter et d'abaisser un train de tiges - Google Patents

Elevateur permettant de remonter et d'abaisser un train de tiges Download PDF

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Publication number
WO1994004788A1
WO1994004788A1 PCT/EP1993/002212 EP9302212W WO9404788A1 WO 1994004788 A1 WO1994004788 A1 WO 1994004788A1 EP 9302212 W EP9302212 W EP 9302212W WO 9404788 A1 WO9404788 A1 WO 9404788A1
Authority
WO
WIPO (PCT)
Prior art keywords
elevator
box
wedge
valve
slips
Prior art date
Application number
PCT/EP1993/002212
Other languages
English (en)
Inventor
Manfred Jansch
Original Assignee
Weatherford/Lamb, Inc.
Lucas, Brian, Ronald
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 Weatherford/Lamb, Inc., Lucas, Brian, Ronald filed Critical Weatherford/Lamb, Inc.
Priority to AU49495/93A priority Critical patent/AU4949593A/en
Publication of WO1994004788A1 publication Critical patent/WO1994004788A1/fr

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
    • E21B19/02—Rod or cable suspensions
    • E21B19/06—Elevators, i.e. rod- or tube-gripping devices
    • E21B19/07—Slip-type elevators

Definitions

  • This invention relates to an elevator for raising and lowering a pipe string and a drilling rig provided with such an elevator.
  • suc ⁇ cessive lengths of pipe are attached to one another to form a pipe string which is progressively lowered into the well.
  • the pipe string is usually supported by an elevator which is attached to a travelling block.
  • the elevator is then disconnected from the pipe string and raised.
  • One or more lengths of pipe are then connected to the exist ⁇ ing pipe string and the elevator is reconnected to the uppermost pipe.
  • each pipe is provided with a threaded socket, referred to in the art as a "box"
  • the elevator is provided with wedges which, ideally, should engage the pipe immediately below the box.
  • Various problems can arise with known elevators. In particular, it is often difficult to see on which part of the pipe the wedges come to rest. If they grip the outer surface of the box then there is a serious risk that the pipe string will slip, perhaps allowing the entire pipe string to plummet down the well.
  • pipe strings may weigh up to 500 tonnes .
  • the present invention provides an elevator for raising and lowering a pipe string, comprising a plurality of pipes each provided with a box, which elevator is provided with at least one wedge for grip ⁇ ping said pipe string, characterized in that said eleva ⁇ tor further comprises a safety device to inhibit closure of said wedge on a box.
  • said safety device comprises a valve and a sensor which is associated with said valve and which, on engagement with said box, allows said at least one wedge to be applied.
  • said sensor and said at least one wedge are juxtaposed so that when said sensor engages said box said at least one wedge will be applied to said pipe close to the bottom of said box immediately below said box.
  • said elevator includes a guide plate having an opening for locating said box with respect to said sensor.
  • said elevator includes an indicator responsive to actuation of said valve.
  • said indicator is responsive to engage- ment of said at least one wedge with said pipe.
  • said indicator gives a visual and/or audible signal.
  • said sensor comprises a wheel.
  • said wheel is provided with a cam surface, the arrangement being such that as said box enters said elevator said wheel rolls along said box and said cam surface actuates said valve after said wheel has rolled a predetermined distance along said box.
  • said wheel is mounted on an inner housing which is slidably mounted in an outer housing secured to said elevator.
  • said sensor comprises a pivotally mounted trip, a spring biasing said trip towards (in use) a box in said elevator, and a connect- ing member connecting said trip to said valve so that when said box displaces said trip said connecting member actuates said valve.
  • said sensor comprises one or more bands resiliently mounted across said elevator so that when said elevator is lowered onto said box, said band(s) are displaced upwardly to actuate said valve.
  • said elevator includes a spring acting to restore said band(s) to their home position when said elevator is lifted from said box.
  • said elevator includes means to adjust the height of said safety device with respect to said elevator.
  • the present invention also provides a drilling ring comprising an elevator according to the invention and slips for gripping a pipe string whilst said elevator is disconnected from said pipe string, characterized in that said drilling rig further comprises means connect ⁇ ing said safety device of said elevator and said slips, said means functioning to release said slips after application of said at least one wedge.
  • said means functioning to re ⁇ lease said slips after application of said at least one wedge comprises a spool valve actuable to allow pneu- matic fluid to release said slips and a time delay circuit which includes an orifice which, on application of pneumatic fluid to apply said at least one wedge to said pipe, allows pneumatic fluid to flow to means for actuating said spool valve at a restricted rate so that said actuation of said spool valve is delayed.
  • said means functioning to release said slips after application of said at least one wedge comprises a valve which opens to release said slips only when the pressure applied to close said at least one wedge reaches a predetermined level.
  • Figure 1 is a side view, with parts cut away, of one embodiment of an elevator in accordance with the present invention
  • Figure 2 is a side view with parts cut away, of a second embodiment of an elevator in accordance with the present invention
  • Figure 3 is a side view with parts cut away, of part of a third embodiment of an elevator in accordance with the invention
  • Figure 4 is a side view, with parts cut away, of a fourth embodiment of an elevator in accordance with the invention.
  • Figure 5 shows a pneumatic circuit diagram respon ⁇ sive to the actuation of the safety device in the embo ⁇ diments described above;
  • Figure 6 shows one embodiment of a pneumatic cir- cuit diagram for linking the actuation of the safety device in the embodiments described above to the opera ⁇ tion of the slips;
  • Figure 7 shows another embodiment of a pneumatic circuit diagram for linking the actuation of the safety device in the embodiments described above to the opera ⁇ tion of the slips.
  • an elevator 1 comprises a housing 2 containing wedges 3, which can be applied by a pneumatic cylinder 4 against the outer surface of a pipe 5.
  • the elevator 1 is lowered over the box 6 located at the upper end of the pipe 5.
  • a guide plate 9 having a centring opening 10 to enable the box 6 and hence the entire pipe 5 to be held sub- stantially concentrically in the elevator 1.
  • the annular surface 11 of the centring opening 10 is tapered downwardly.
  • a safety device 13 is mounted on the annular plate 9.
  • the safety device 13 comprises an outer housing 14 in which is slidably mounted an inner housing 15.
  • a spring 16 acts between the inner housing 15 and the outer housing 14.
  • a control valve 21 is mounted on the inner housing 15 and is provided with a pin 20.
  • a control wheel 17 is rotatably mounted on the inner housing 15 and bears a cam 18, which is constantly in contact with the contact roller 19 of the pin 20 of control valve 21.
  • the position of the control valve 21 within the inner housing 15 can be varied by an adjust ⁇ ing screw 22.
  • the inner housing 15 is displaced to the left as shown in Figure 1.
  • the control wheel 17 rotates, so that the cam 18 progressively displaces the control roller 19 to the left until the control valve 21 is actuated.
  • a spring (not shown) ensures return of the control wheel 17 to a home position when the elevator 1 is lifted off the box 6.
  • a safety device having a control wheel 30 without a cam is shown by Figure 2, in which, as in all other Figures, the same reference numerals are used for parts having similar functions.
  • the control wheel 30 is rotatably mounted in a housing 31, which is disposed on a vertically adjustable mounting plate 32.
  • the vertical adjustment is achieved by adjusting screws 33, which extend through threaded openings in the mounting plate 32.
  • the control valve 21 is also mounted on the mounting plate 32.
  • the pin 20 of the control valve 21 is biased against the rear of the housing 31 by a spring (not shown).
  • the housing 31 is biased by a spring 34 in the direction of the elevator and, in use, is deflected back from this position as a box 6 enters the elevator 1 as a result of which the control valve 21 is switched by means of the pin 20.
  • the adjusting screws 33 rest on a baseplate 35 having slots 36 which enable the entire device to be adjusted according to the diameter of the box 6.
  • the baseplate 35 is screwed to the guide plate 9, the fastening screws being identified by reference numeral 37.
  • FIG. 3 A further embodiment is shown by Figure 3, having a safety device incorporating a trip 40. This is arc- shaped and is pivoted to the holding plate 32 on a shaft 43. A connecting bar 41 is pivotally connected between the trip 40 and the pin 20. A restoring spring 42 biases the trip 40 towards the box 6. As a box 6 enters the elevator 1 the trip 40 is displaced resulting in the pin 20 actuating the control valve 21.
  • a particularly simple embodiment of a safety device is shown by Figure 4.
  • the control valve 21, which, just as in the embodiments according to Figures . 2 and 3, rests on a vertically adjustable mounting plate 32, can be actuated by one or more elastic contact bands 50 extending transversely across the centring opening 10 of the guide plate 9.
  • the home position of the contact bands 50 is identified by the broken line 50'.
  • the contact bands 50 are raised. They yield elastically, in the upward direction withdrawing the pin 20.
  • a spring 52 ensures the return of the pin 20 into its home position as soon as the contact bands 50 are released when the elevator 2 is lifted off the box 6.
  • This embodiment offers particularly simple con- structional features.
  • the contact bands 50 are merely rigidly fastened, on the side lying opposite the safety device, to a suitable vertically adjustable plate or the like.
  • Figure 5 shows the pneumatic circuit diagram of a simple system in which the pneu ⁇ matic fluid is compressed air.
  • the rapid-action coupling 60 is coupled to a supply of compressed air (Figure 5).
  • Compressed air initially bears against the control valve 21 and spool valve 61, which is spring-loaded and actuable by com ⁇ pressed air.
  • compressed air passes through line 62 and displaces the spool of spool valve 61 to the right as shown in Figure 5.
  • This allows compressed air to pass through spool valve 63 and actuate the pressure cylinder 4 to apply the wedges 3.
  • com ⁇ pressed air is applied to indicator 23 to extend bar 24.
  • bar 24 may be physically connected to the pressure cylinder 4 so that the bar 24 indicates the true position of the clamping wedges 3.
  • the circuit diagram according to Figure 6 shows one way in which the actuation of the elevator may be linked to the actuation of the slips.
  • the spool valve 63 ( Figure 5) is replaced by an electromag- netically actuable spool valve 64.
  • the pneumatic cylin- der 4 for applying the wedges 3 of the elevator 1 and a pneumatic cylinder 65 for releasing the slips (not shown) are connected so that compressed air is not supplied to the pneumatic cylinder 65 to release the slips until after the wedges 3 are applied.
  • pneumatic cylinder 4 applies the wedges 3.
  • pneumatic fluid flows through line 68 to a time delay circuit 67.
  • the pressure fluid flows through line 68' to an adjustable orifice 67' which restricts the flow and thus the actuation time of spool valve 67" to permit compressed air to flow into the pneumatic cylinder 65.
  • the elevator 1 In practice it will normally be necessary for the elevator 1 to be raised to lift the pipe string slightly before the slips will release.
  • valve 67" may be operable in response to an upward thrust on the slips, i.e., in response to the pipe string being lifted by the elevator.
  • release of the slips would be inhibited until engagement of the wedges 3 of the eleva ⁇ tor 1 with the pipe is confirmed by the sensor. Similar ⁇ ly, release of the wedges 3 of the elevator 1 would be inhibited until engagement of the slips is confirmed by the appropriate sensor.

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)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)
  • Types And Forms Of Lifts (AREA)

Abstract

L'invention concerne un élévateur (1) équipé d'un dispositif de sécurité (13) conçu pour assurer que des coins (3) sont appliqués sur une tige (5) au-dessous de son joint à filetage femelle (6). Dans les modes préférés de réalisation, les surfaces de glissement sont relâchées automatiquement une fois les coins (3) appliqués. A l'inverse, les surfaces de glissement sont appliquées avant que les coins (3) ne soient relâchés de façon que le train de tige soit toujours soutenu.
PCT/EP1993/002212 1992-08-21 1993-08-18 Elevateur permettant de remonter et d'abaisser un train de tiges WO1994004788A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49495/93A AU4949593A (en) 1992-08-21 1993-08-18 Elevator for raising and lowering a pipe string

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19924227645 DE4227645C2 (de) 1992-08-21 1992-08-21 Sicherheitsvorrichtung für einen Rohrelevator
DEP4227645.4 1992-08-21

Publications (1)

Publication Number Publication Date
WO1994004788A1 true WO1994004788A1 (fr) 1994-03-03

Family

ID=6466009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1993/002212 WO1994004788A1 (fr) 1992-08-21 1993-08-18 Elevateur permettant de remonter et d'abaisser un train de tiges

Country Status (3)

Country Link
AU (1) AU4949593A (fr)
DE (1) DE4227645C2 (fr)
WO (1) WO1994004788A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357530A (en) * 2000-11-04 2001-06-27 Weatherford Lamb Apparatus and method for gripping and releasing tubulars including a grip assurance mechanism
WO2002036927A1 (fr) * 2000-11-04 2002-05-10 Weatherford/Lamb, Inc. Commande de prise combinee des elements glissants d'un elevateur et d'une araignee
US6386282B1 (en) 1997-06-25 2002-05-14 Weatherford/Lamb, Inc. Safety switching system for clamping devices for pipes
US8356675B2 (en) 2007-04-27 2013-01-22 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
CN107448157A (zh) * 2016-05-31 2017-12-08 江苏如通石油机械股份有限公司 一种整体式吊卡
FR3094740A1 (fr) * 2019-04-08 2020-10-09 Inertia Holding Collier de levage rotatif

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006038763A1 (de) * 2006-08-17 2008-03-20 Blohm + Voss Repair Gmbh Vorrichtung zur Halterung von Bohrrohren

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787578A (en) * 1929-11-09 1931-01-06 Gerald R Hunt Elevator
US2545177A (en) * 1949-08-26 1951-03-13 Standard Oil Dev Co Control for power-operated slips

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1787578A (en) * 1929-11-09 1931-01-06 Gerald R Hunt Elevator
US2545177A (en) * 1949-08-26 1951-03-13 Standard Oil Dev Co Control for power-operated slips

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6386282B1 (en) 1997-06-25 2002-05-14 Weatherford/Lamb, Inc. Safety switching system for clamping devices for pipes
GB2357530A (en) * 2000-11-04 2001-06-27 Weatherford Lamb Apparatus and method for gripping and releasing tubulars including a grip assurance mechanism
WO2002036927A1 (fr) * 2000-11-04 2002-05-10 Weatherford/Lamb, Inc. Commande de prise combinee des elements glissants d'un elevateur et d'une araignee
GB2357530B (en) * 2000-11-04 2003-09-03 Weatherford Lamb Method and apparatus for gripping tubulars
US7086461B2 (en) 2000-11-04 2006-08-08 Weatherford/Lamb, Inc. Combined grip control of elevator and spider slips
US8356675B2 (en) 2007-04-27 2013-01-22 Weatherford/Lamb, Inc. Apparatus and methods for tubular makeup interlock
CN107448157A (zh) * 2016-05-31 2017-12-08 江苏如通石油机械股份有限公司 一种整体式吊卡
FR3094740A1 (fr) * 2019-04-08 2020-10-09 Inertia Holding Collier de levage rotatif

Also Published As

Publication number Publication date
DE4227645C2 (de) 1996-10-17
AU4949593A (en) 1994-03-15
DE4227645A1 (de) 1994-03-17

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