DE1816490B2 - ELEVATOR FOR DRILL RODS AND THE LIKE - Google Patents

Description

seen from the front with the flaps in the open position,

F i g. 6 shows a section along line 6-6 in FIG. 1, seen in the direction of the arrow,

7 shows a section corresponding to FIG. 6, however, the flaps are in the open position,

Figure 8 is a partial elevation showing the locking device for the flaps in the disengaged position,

F i g. 9 is a partial top view, partly in section, taken along line 9-9 of FIG. 8, seen in the direction of the arrow,

10 shows a partial section of the locking device, which secures the flap bottom part against rotation with respect to the main body of the elevator.

In the case of the various figures, in particular in FIGS. 1 and 2 illustrated embodiment of the invention is an elevator, which is used to be placed on a drill pipe that is raised, lowered or in is to be handled or discontinued in any other way. The elevator is used in conjunction with Drill pipes used that have a collar with a downward shoulder at the top, which is used to be placed on the elevator, reaching around the circumference of the pipe Flaps form a seat for the drill pipe.

As shown in the figures, the elevator consists of a base body 11 with a flap arrangement having base part 12.

The base body 11 has a vertical, cylindrical bore 13 (see FIGS. 6 and 7) into which the base part 12 is inserted, as will be described below. The base body 11 has brackets 14 and 15 protruding on both sides, with which the base body can be suspended in a known manner on the hook of a hoist. These brackets can accommodate lifting links (not shown) which are held in place by bolts 16 and 17. The brackets 14 and 15 have an outwardly extending upper projection 18. which is designed to receive a lifting link. A distance from the upper projection 18, a lower projection 19 angeo ^r dnet. The distance between the upper and lower projections 18 and 19 of the two brackets 14 and 15 is dimensioned so that a lifting member can be inserted between them in the lateral direction, whereupon the bolts 16 and 17 are used to close the openings. This arrangement, used to hold the whiskers, is common in elevators.

As can be seen in particular from FIGS. 6 and 7, the base part 12 has a lower tubular shape Section 21 with an upper, radially outwardly projecting flange 22. The tubular Section 21 is removably inserted into the vertical bore 13 of the base body 11, and the lower The radial surface of the flange 22 serves to support the base part 12 on the base body 11. A ball bearing 23 is arranged with its races in a counter bore 24 of the vertical bore 13 and supports the flange 22 so that the bearing is positioned between the flange 22 and the Basic body 11 occupies. The base part 12 can thus rotate freely, being supported by the bearing 23 is supported on the base body 11. A snap ring 25 secures the base part 12 against an upward directed displacement in the base body 11. This arrangement is known in elevators and therefore forms in itself not a feature of the invention.

The base part 12 has a through opening 26, which can be passed through in a known manner a drill pipe is used.

As can be seen from FIGS. 1, 6 and 7, are on Base part 12 approaches 27 and 28 provided by

ίο the top of the flange 22 on opposite one Sides of the opening 26 protrude upwards. These approaches 27 and 28 of the base part each have one horizontal hole in which flap hinge pins 29 and 31 can be used.

A flap 32 has fork legs 33 and 34 arranged at a parallel distance from one another. between which the approach 27 of the base part is added. The fork legs 33 and 34 are provided with bores which are aligned with (■■: bore in the extension 27 and serve to accommodate the hinge pin 29 with which the flap 32 is hinged to the flange 22 of the base part. In this way, the flap 32 can the pivot pin 29 can be pivoted from a horizontal to a vertical position.

The flap 32 is designed so that it is in the horizontal position on the top 35 of the flange 22 of the base part 12 rests and with a conically tapering, downwardly protruding Ring portion 36 engages the upper end of opening 26 to taper on a conically Support bevel 37 of the opening. This arrangement is known per se.

The flap 32 has a semi-cylindrical recess 38 on the upper side, the diameter of which that of a certain Rohics:> praises that should be picked up by the elevator. The top of the flap surrounding the recess 38 is provided with a bearing surface on which the pipe connector, which has a larger diameter than the recess 38 is supported

Correspondingly, an opposite flap 39 is provided, which are spaced parallel to one another arranged fork legs 41 and 42, between which the extension 28 of the base part 12 was added is. The fork legs 41 and 42 also have bores for receiving the hinge pin 31, with which the flap 39 on the extension 28 of the base part 12 in the same way as the flap 32

Co is stored. The flap 39 also rests in its horizontal position on the upper surface 35 of the flange 22 of the ßasisteils and is connected to ^e: NEM provided by protruding below ring portion 43, which is seated on which koniscn tapered Anfasun "37, as already with respect to the projecting downwardly ring portion 36 of the flap 32 has been described. The flap 39 also has a semi-cylindrical recess 44 on its upper side. The flap 39 can be pivoted about the hinge pin 31 from a substantially vertical to a horizontal position or position. When the flaps 32 and 39 are in the horizontal position, the recesses 38 and 44 form an essentially circular opening through which the pipe to be held can extend. The diameter of the opening corresponds essentially to the diameter of the pipe or is slightly larger. As mentioned earlier, the shoulder did

of the drill pipe connector has a larger diameter than the recesses 38 and 44, so that the Drill pipe connector on the flaps 32 and 39 can be supported. Between the two flaps should be a small space so that the flaps can be raised or lowered properly can.

As can be seen in particular from FIGS. 1, 3 and 4 The flap 39 has a downwardly projecting one-piece lug 45 on the side which is a pin 46 on the flap. This pin 46 is with respect to the center of the hinge pin 31 laterally offset.

In the same way, the flap 32 has an extension 47 on one side, the extension 47 after protrudes up and in towards the center of the elevator and with respect to the center of the hinge pin 29 is arranged laterally offset. The extension 47 carries a pin 48.

The pin 46 and the pin 48 are connected to one another by a connecting rod 49 which is attached to one end is rotatably mounted on the pin 46 and secured by a split pin 50. The connecting rod 49 is rotatable at its lower end on the Journal 48 is supported and secured by a split pin 60. Suitable washers are between the Cotter pins and the connecting rod 49 are provided. This arrangement has the effect that upon pivoting of the one flap (for example the flap 32) around its hinge pin the connecting rod 49 the other flap is also pivoted to the same extent, which is due to the leverage of the Connecting rod 49 connected laterally offset pins 46 and 48 is effected.

The fork leg 33 of the flap 32 has an inclined stop surface 51 (see in particular Fig. 4) at its outer end and a lower stop surface enclosing an acute angle therewith 52 under the hinge pin 29 through which the connecting rods each in the setting for the vertical or the horizontal position of the flaps is held. On the top 35 of the flange 22 of the base part is a leaf spring 53 with a Head screw 54 or the like attached, as shown in FIGS. 3 and 4 can be seen. This leaf spring stands outwards to a point below the fork 33 and is in the horizontal position of the flap on its lower stop surface 52 and in the vertical position on its end stop surface 51 at. The leaf spring 53 exerts a holding pressure against the respective stop surface, the must be overcome if the setting of the flap is to be changed. This pressure is usually sufficient to prevent the flaps from changing position unless it does a force acts on them which is sufficiently great to overcome the pressure of the leaf spring 53. Therefore the flaps normally remain in the set position.

As can be seen in particular from FIGS. 1, 2 and 10, the extension 28 of the base part has a rearwardly projecting fork with an upper leg 55 and a lower leg 56. A vertical one extends through both legs 55 and 56 Through hole, in which a locking pin 57 is guided, in the upper end of which is a side protruding hand lever 58 is screwed in. The locking pin 57 has an enlarged diameter lower end portion 59, which reinforces the locking pin and thereby forms a shoulder, on which a the locking pin 57 surrounding helical spring 70 is supported, which with her upper end is shown on the inside of the upper leg in Fig. 10, engages, so that the locking pin 57 is always printed down. The upper leg 55 has an upwardly projecting one Approach 61, in the upper side of which there is a lateral groove 62 which is used to receive the hand lever 58 serves. In addition to the extension 61, the upper leg 55 has a further groove 63 in its upper one Surface which also serves to receive the hand lever 58. When the locking pin 57 is in the lower position, in which he continues from the lower bracket 56 downwards protrudes, the hand lever 58 is located in the groove 63. The locking pin 57 can, however, in its upper position is raised and held in this position by using the hand lever is rotated until the hand lever engages in the groove 62. The locking pin is in this position 57 practically does not protrude beyond the lower surface of the lower leg 56.

On the green body 11, pairs of noses 64, 65 and 66, 67 are provided which protrude upwards and create a space between them. These two pairs of noses are diametrically opposed on the Upper side of the Grunuküipcrs 11 arranged and serve to accommodate the locking pin 57 between them and the base part 12 against it if necessary Secure rotation. In an elevator of the type used here, it is often necessary to have a drill pipe section to hold while it is rotated to match it with one already in the wellbore To connect drill pipe string or to detach from it. It is therefore necessary that the holder for the Pipe string is rotatably mounted. If the rotation is desired, the hand lever 58 and thus the Locking pin 57 raised and then turned approximately a quarter turn (counterclockwise In the illustration of FIG. 1), the hand lever 58 is inserted into the groove 62 of the projection 61. As a result, the locking pin 57 is disengaged from the pairs of noses 64, 65 or 66, 67, and the base part can rotate freely. W. ir the base part is to be secured against rotation the hand lever 58 of the locking pin ir the in F i g. 1 position shown, d. H. ir the groove 63, and the hand lever is released after the locking pin 57 with the Luck « is aligned between one of the pairs of noses 64, 65 or 66, 6 '. Then the locking pin engages ii the gap between one of the pairs of noses and secures the base part against rotation in the ground body 11 of the elevator.

The next step is to lock the flaps 3 '. and 39, which are best described in Figs. 1, 2, 5, 8 and 9 can be seen. A flap, called flap 32, preferably has an attachment 68 on its upper side and in the vicinity of the flap opening, on which a lock 71 is pivotably mounted by means of a hinge pin 69. This lock 71 consists of a lever with a hand lever 72 one side of the hinge pins 69 and a lever arm 75 de on the other side hinge pin 69. below the pivot pin 69 h after another above the bottom arm 73 vorg "

7 8

see, which is designed as a hook 74. The lever-spaced, the duct bore 87 arm 75 has an upper stop 76 which has intersecting slots 89 and 91, as can best be seen on the underside of a safety lock 77 in FIGS. 2, 8 and 9 . Can be brought from the handle, which is integral with the locking ram 88, a pin 92 protrudes radially, flap 32 or the fork leg 34 of the same 5, which is designed as a handle for moving the lock. On the lever arm 75, a stem feed 88 is provided in the longitudinal direction in the bore 87, second stop 78 below, which serves to serve with. The pin 92 can be inserted into the slot 89 to come into engagement with the stop 79, so that it protrudes the locking ram 88 which protrudes in a lateral direction from the flap 32 to an extended position below the hood of a point which is in one Distance io kcns 85 of the sliding bracket holds. In this position below the lower level of the lever arm 75 there is no locking of the hooks 74 and 85. Possible between the lever arm 75 and the connection. On the other hand, the pin 92 also in stroke 79 is a compression spring 81, which is inserted with the slot 91, in which position one end in a bore 82 in the underside of the locking ram 88 is ineffective and a lever arm 75 and at its other end in a 15 locking of the hooks 74 and 85 not affected, corresponding hole 83 in the upper surface of the normally the locking stop 79 is inserted. In this way, the stamp presses in the position in which the pin 92 engages the lever arm 75 in the compression spring 81 against the slot 91 so that the flaps 32 and safety lock 77. If the hand lever 72 cannot be opened by mistake and is lifted, the whole arrangement in the clock 20 releases the pipe string located in the elevator, rotated clockwise around the hinge pin 69, so that this is an important safety precaution when the Ardcr lever arm 75 works down against the stop 79 with pipe strings or rod parts,
emotional. The lever exerted on the hand lever 72. It is sometimes desirable to force the elevator to raise it using the hinge pin 69, transferring a string of tubing from a horizontal flap 32, and raising the 25 position further. For this purpose, it is necessary that the hand lever 72 causes the flap 32 and the elevator to be pivoted to the side and the opening 39 assigned to it is aligned with the end of the pipe string about its assigned joint 26, icnksiifte 29 and 31 in the opened one or lower so that the elevator can slide on the pipe string to the right positions can be pivoted. or the pipe string is pushed into the elevator. During this process, the welds are connected or formed in one piece with them. Flaps 32 and 39 are in the open position to the del, which has a hook attachment 85 with a stop receptacle for the pipe string. This process leaves surface 86 on which the arm 73 of the locking device normally rests with known devices only with difficulty 71 when the clumsiness occurs because the elevator lifts up in the closed or in the horizontal position. 35 ches weight and this process is dangerous. It can be seen that the hook is connected for the operator. In order to simplify this operation 74 of the arm 73 under the hook 85 of the sliding arm and the handling for 84 can move. In this position, the hats act to facilitate the operator, here ken 74 and 85 together and hold the flaps in the elevator shown in the lower projections 19 of the horizontal position. If the hand lever 40 of the brackets 15 and 14 each have a recess 93

72 is raised, the arm 73 is clockwise or 94 to insert a for tilting or meaning pivoted and thereby moves the hook 74 from inclined positions of the tool used. As its position below the hook 85, the schematically shown in FIG. 4, can be in an or Latch is released so that the folding two recesses 93, 94 a rod 95 or a Let the pen lift into the vertical position. There is another tool to be introduced with which the note that the pivoting movement of the elevator arm can be tilted on its side when it is

73 in the Uhi-clockwise direction by being pushed at the stop 79 onto a horizontally lying pipe gripping stop 78 of the lever arm 75 is intended to be limited. The Vorist achieved by such an arrangement, so that this movement only has to be carried out so far, part is readily apparent.

until the hook 74 moves out of the position of engagement with the 50

Hook 85 of the sliding bracket is released and the locking device is entered. in the

release. In addition, the stop surface 86 has operation of the elevator with rods on the hook

of the slide bracket 84 is preferably suspended at an incline in that of a flange pull roller block, mil

for example in FIG. 2 in the manner shown, so that it can be raised and lowered in the derrick

that the outer end of the hook 74 on the surface 55 can. If the drill pipe comes from a drilling

slide along the stop 86 and automatically pull out the elevator, the elevator is in a «

ter the hook 85 of the sliding bracket 84 can engage, position lowered over the end of the pipe string

when the flap 32 is in the horizontal position, normally by means of intercepting wedges or the like

is brought. By the force of the compression spring 81, which is th. Then the hand lever 72 for the folding

acts on the lever arm 75, the hook 74 is raised 60 pen, whereby the arm 73 around the Ge

moved counterclockwise, whereby the self-steering pin 79 is pivoted clockwise, bi

term locking takes place. the lever arm 75 with the stop 79 in engagement *

In many cases it is undesirable for the clap to get. Then this whole facility acts as one

pen are screwed up in the horizontal position. The extension of the flap 32 and pivots di

Sliding bracket 84 has a horizontal through 65 flap 32 around the hinge pin 29 of the base part 12

bore 87 for rotatable and axially displaceable With further movement of the hand lever 72 di

Receipt of a locking plunger 88. The flap 32 is brought into the vertical position. Here

The upper end of the sliding bracket has two axially when the connecting rod 49 moves the flap 3

also in a corresponding, vertical position, so that the elevator is open to receive the pipe string. Then the elevator is on the end of the pipe string lowered until it is below the rod connector. Next the hand lever 72 is tightened until the lever arm 75 overcomes the force of the leaf spring 53 strikes the upper stop 76, the flaps moving into the horizontal position. The hook 74 provided at the end of the arm 73 slides along the stop surface 86 on the linde of the sliding arm S4 downwards and reaches mil the Glcilbügelhaken 85 in engagement.

When free rotation of the piping-supporting flaps is desired. will that Base part 12 released in that the hand lever 58 of the locking pin 57 is raised and against is rotated clockwise to a position above the groove 62 on the stop 61, whereupon the hand lever 58 engages in the groove 62 under the pressure of the spring 70. This will open the locking pin 57 brought out of engagement with the pairs of noses 64, 65 and 66, 67 on the base body. When a Rotation of the flap assembly is to be prevented, the hand lever 58 of the locking pin 57 raised and pivoted until the hand lever is above the groove 63. If now The Hiinuhebcl is released, the moves Lock pin 57 down under the influence of spring 70 and handle 58 locks into the groove. When the assembly is to be locked against rotation, the locking pin will turn aligned with the space between the pairs of noses 64, 65 and 66, 67, respectively, before it enters its lower Position is brought in which it engages with the corresponding lugs. Through this the base part 12 is locked to the base body 11.

If it is desired to use the elevator in a manner in which the locking of the Flaps is put out of operation, the locking bolt 88 is in the in the F i g. 8 and 9 brought left-sided position. In this position, the left-hand end of the locking pin prevents 88 that the hook 74 is in the locking position under the hook 85 of the sliding bracket comes.

If a horizontally lying pipe is to be lifted with the elevator, first the flaps 32 and 39 moved to the open position, in which they are held in place by the leaf spring 53 and the articulation between the flaps will. Then a rod or other tool that is used for tilting is in the recess 93 or the recess 94 or inserted into both recesses and the elevator on the Page tilted. It is then easy to push the elevator onto a horizontally lying pipe Close flaps and raise the pipe. The use of a tilting tool enables the operator to exert sufficient leverage to prevent the Elevators can be done easily and effortlessly.

The exemplary embodiment of the invention shown here can be further developed in many ways or changed.

For this purpose 2 sheets of drawings

Claims (3)

1 2 the individual pipe claims that form the drill pipe: strings are screwed together, the pipe strings must be pulled when lowering or pulling the drill pipe 1. Elevator for drill rods and the like Base body, swiveling flaps 5 connections can be rotated, which is usable a base part for holding the drill pipe kdt the elevators with non-rotating flaps and facilities for attaching the elevator are very limited. To make the elevators more versatile the hoist of a derrick exists and to make it reversible, one has the jaws rotatable in the in which all flaps are stored via a device only elevator, but with a lock are pivotable in the same direction and a release of the same in the closed position cannot be predetermined Locking the flaps with unlocking can be seen, which is associated with considerable dangers and hand lever is provided, is because the flaps can open when at indicates that all flaps (32; 39) on Absei ken of the drill pipe a sudden jerk a common base part (12) arranged by hitting an obstacle occurs or when are rotatably mounted in the base body (11) 15 connecting a pipe string to the linkage is, and the individual parts of the lock (71) direction of rotation is suddenly reversed. on one of the flaps (32; 39) and on the base part The invention is based on the object of providing a (12) and the unlocking on the base part (12) on the elevator of the above type, but with rotatably mounted are brought. To create flaps that have an optionally locked 2. Elevator according to claim 1, characterized in that it takes 20 or unlocked closed position shows that the befe- can on one of the flaps (32). continuous rotatable lock (71) from a This task position is according to the invention rotatably mounted on this flap arm (73) solved in that all flaps are on a common, the base part arranged at one end of the hand lever (72) Mnd. rotatable in and at its other end a lever arm (75) 25 base body is mounted. and the individual parts of the with an upper and lower stop (76; 78) locking on one of the flaps and on the base part has, the flap (32) with a safety and unlocking are attached to the base part, closed (77) against. : ne upward directional An advantageous embodiment of the invention movement of the lever arm ("75) and an object can be seen in that the at one of the impact (79) against a downwardly directed 30 flaps fastened rotatable lock from a movement of the lever arm (75) vcrser ": n is and there is an arm mounted rotatably on this flap. Devices are provided that the arm of the hand lever at one end and its other (73) to act against the upper stop (76) end a lever arm with an upper and unbeatable end, this arm (73) having a device teren stop, the flap with a device (74) has, with a hook attachment 35 safety lock against an upward (85) on the base part (12) engageable movement of the lever arm and a stop spirit. gen a downward movement of the lever 3. Elevator according to claim 1, characterized thereby, is provided and devices are provided draws that the unlocking from one on the Ba- are that to besisteil the arm against the upper stop (12) hit the attached sliding bracket (84) with a 40, which has a device Through hole (87), one in this hole with a hook attachment on the base part in Einrung stored locking stamp (88), -ler can be brought into grip. Unlocking position can be extended. To set an optionally assigned or de- and from a closed position of the flaps on the rotatable locking bolt, the invention stamp sees (88) arranged pin (92) consists, 45 preparation that the unlocking from one on the base through which via an adjustment device (89, partially attached sliding bracket with a through hole 91) on the sliding bracket (84) of the locking device, a locking ram mounted in this hole (88) can be extended and retracted. Lungss'empel, which is extended in unlocking position can be, and from one to the rotatable 50 locking plungers arranged pin consists, through which the locking ram out and in via an adjustment device on the sliding bracket The invention relates to an elevator for drilling. rod and the like, which consists of a base body, from- An embodiment of the subject of the invention- pivotable flaps on a base part of the shark stand will be described below in connection with the drill rods and devices for drawing on. It shows
hang the elevator on the hoist of a drilling F i g. 1 shows a plan view of the elevator according to FIG tower and in which all flaps have one of the invention, The device can only be pivoted in the same direction. 1 shown like a releasable locking of the flaps with Ent- 60 Elevators seen from the front, locking and hand lever is provided. FIG. 3 is an elevation of the FIG. 1 shown In the known elevators, which are seen from behind to hold elevators, with the flaps of the drill rod or the like pivotable flaps being in the closed position, in wclau'iweise that they carry a drill rod by means of a device with a hand lever,
at the same time from an open to a closed one. 4 one of the F i g. 3 similar representation, in which position and vice versa are movable and in which, however, the flaps can be locked in the open position, the closed position are
Klao; .w-.n arranged non-rotatably in the elevator. Since F i g. 5 one of the F i g. 2 corresponding elevation