DE354393C - Automatic mechanical safety catch for de-nailing deep boreholes - Google Patents

Description

GERMAN EMPIRE

Γ LIBRARIES

BUREAU VOOR DEN

INDUSTRIAL OWN OOM

ISSUED
ON JUNE 29, 1922

REICH PATENT OFFICE

PATENT LETTERING

CLASS 5 a GROUP (Bgigog

Fritz Buhmann jr. in Augsburg.

! Up to now, deep drilling technology has been used to catch workpieces lost in boreholes, z. B. drill bits, drill bits, etc., often insufficient, hand-operated fishing tools. The recently used electromagnet is because of its small size and the small contact surfaces are also unsuitable for handling larger workpieces /.it lift.

Catching the lost workpieces is therefore associated with difficulties and that It is often not possible to clear nailed drill holes.

The method of the present invention provides for the use of an automatically acting, -Mechanical safety gear in front. This does not have to be attached to a linkage, as was previously the case, but can also be attached to attached to a rope in the borehole.

By placing this safety gear on the lost workpiece, the Mechanism of the safety gear activated and the catching of the workpiece causes. This process is indicated by a signal, so that a recovery of the prisoner Workpiece can be done immediately. As the mechanism of the safety gear

Also sets the safety gear when a set time has elapsed automatically opens the claws of the catcher and releases the workpiece, you are left behind the same in the drill hole if a workpiece is caught ■ 5.

A further perfection of the safety gear is achieved that one same with one. Electromagnet provides, which in turn, the workpiece between ίο sucking in the claws of the catcher and pulling over the catching device across or workpieces lying at an angle to the pipe tour.

Automatic mechanical safety gears suitable for carrying out this procedure are indicated in Figs. 1 and 5 of the accompanying schematic drawing.

Fig. 1 shows a longitudinal section of a safety gear. The bottle / is intended to take up P jcßgas or some other suitable pressurized operating medium, which is to serve as an energy source, and is arranged in the jacket m along with the other parts.

hit α on a body, the ζλνΪ5ΰηεη the stop pushed bang cartridge inflamed. This sends a signal for the start of work. give and at the same time by the pressure development of the explosive, which by a Tube after the relay r is transmitted, this is triggered.

The relay r then switches the fuel to the piston engine c and causes the piston k to move.

The connecting tubes ν serve to transfer the operating material to the valve body and the control element u of the machine.

The displacement of the., Piston k takes place until the claws ρ encounter resistance or until they are completely closed, ie the piston k has reached its end of stroke.

A mechanism built into the relay switches the operating fluid to the control unit after a preset time has elapsed , so that the slide moves into the other. Field of the valve body is moved. , • The piston is now receiving pressure from the. ' lower side and is brought back to its original position, with the ^! The claws are opened and the trapped piece is released. i

This switching process is necessary because the workpiece is trapped in the pipe. tour fcsthang (get caught). !

The piston k has already covered the half stroke in Fig. 1 and the joint piece g moved by the angle χ by inserting the wedge piece t between the cams η , ie the claws have moved around the workpiece to be caught. In the second half of the stroke of the piston, the claws ρ 6 $ are closed.

This arrangement has the advantage that the catcher is open to the side when it is attached and can be better slipped over an A-piece that is inclined in the pipe turn.

Fig. 2 shows a cross section through the joint g of the catcher.

The claws ρ are indicated by dashed lines.

The position of the joint piece corresponds to the "piston position" in Fig. 1, that is, after the movement through the angle χ has already taken place

! The claws of the catcher can also be designed as shown in Fig. 3. The arms / are supported in fixed points. Closing and opening the Catcher is effected as before by the movement of the piston.

The jaws b are held in the vertical position by spring tension and can be rotated in the bolt ζ.

These claws can have a horizontal, i. H. a piece lying transversely under the pipe tour grasp, which then erects when the catcher is lifted and through the pipe tour. can be promoted.

The entire safety gear is encased in a closed tubular jacket m so that it can easily work under water or oil.

From the description of the safety gear according to Fig. 1, 2 and 3 it is evident that the same must be slipped over the workpiece to be caught in order to trigger the stop a. The latter can only take place when the workpiece assumes a suitable position in the borehole.

It is therefore advisable to catch at right angles to the pipe tour and workpieces lying on the side the use of a safety gear with electromagnet shown in Fig. 4 and 5.

Fig. 4 shows a longitudinal section of the safety gear, which, in addition to the parts described in Fig. Ι, is also equipped with an accumulator battery i and an electromagnet c .

This safety catch equipped with the electromagnet c is brought over a workpiece lying transversely or to the side of the pipe tour, the latter will be sucked in between the claws of the catcher, so that the stop is released and the process goes on as mentioned in Fig. 1. .120

Fig. 5 shows a cross section of the catcher above the claws.

The claws are in the open state of the Drawn by the catcher.

The closing and opening of the catcher is not effected, as in Fig. 1, by means of a joint transmission, but rather by means of a turntable, which is provided with curved slots. The 'reciprocating movement of the piston is converted by an on the piston rod s sliced coarse thread, which moves in a corresponding female thread of the cylinder cover in a rotating motion. The square end of the piston rod ί turns the turntable d and with it the arms /. »5 until the claws £ encounter resistance bzjv. are closed.

Depending on the design of the catcher, the catching device can also be slotted for bulging or pressed pipes and other work, e.g. B. for drilling can be used.

The arrangement of the individual parts that make up the device described above composed, can of course be any other. The trigger device of the relay can e.g. B. also mechanically by lever transmission or electrically or hydraulically be operated.

Instead of the piston engine, a turbine or an electric one can also be used for the drive Machine to be used. When using

. An electrical machine can also be used instead of an accumulator battery Electricity can be supplied from the outside, with the support rope also being designed as a power cable . det is.

The design of the safety gear is designed so that the upper part is a normal design receives, on which the individual catchers for the different pipe tour diameters and can be attached in a wide variety of designs, depending on the respective purpose. ·

Claims (8)

Patent Claims: 1.Automatic mechanical safety gear for de-nailing deep boreholes, characterized by a device which the safety gear automatically using a Pressure medium (e.g. compressed gases or vapors) closes as soon as it is to be lifted Workpiece gets between rl ic claws and between the claws tripping device located. 2. Embodiment according to claim 1, characterized in that at the same time with caught the triggering of the safety gear is an optical, acoustic or otherwise suitable one Signal is given, which indicates the triggering to the operating personnel. 3. embodiment according to claim 1, ] characterized in that the Aufj placing the device on the piece to be lifted a relay is switched on! which is the leakage of the resources and thus initiates the movement of the claws. 4. Embodiment according to claim 1 and 3, characterized in that in a timer is installed in the relay, j which the movement mechanism a certain time after touchdown reverses the workpiece to be lifted and releases a workpiece in this way. 5. Embodiment according to claim I, characterized in that in the device an electrical power source and an auxiliary magnet located over the claws is built in, which a suction of the piece to be caught in the triggering device should bring about. 6. Embodiment according to claim τ, characterized in that the drive device the claws moved downward out of the jacket of the device, with suitable guide pieces at the first half of the stroke the claws at a certain angle around the Axis of the device can be rotated so that it revolves around the workpiece to be caught move around as they close on the second half of the stroke. 7. Aüsführungsform according to claim 1 and 6, characterized in that on The end of the claw jaws are arranged which are rotatable about a horizontal axis in such a way that they in general be held in a vertical position by spring tension, but under certain circumstances, under the action of the held Move the workpiece in such a position that an elongated workpiece can also be picked up without further ado is possible. 8th.; Embodiment according to claim 1, characterized in that the movement mechanism closing the claws using a turntable . with curved slots by turning the individual claws causes. ' In addition 1 matt drawings.