DE170327C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

In the known devices for determining the deviation of boreholes from the vertical direction, in which a pendulum, its position on the to be measured Location of the borehole is determined, or a fluid that is to be measured Place is brought to solidification, comes to use, a reading can only be made after the device is removed from the

ίο borehole 'has been drawn. With these well-known It is therefore not ■ possible to fix devices continuously during the drilling operation whether the borehole is being drilled vertically. The invention is intended to do this can now be achieved in that the device during the drilling operation in the borehole left above the drill and the swing of the pendulum continuously over days is shown. For this purpose, the pendulum was purchased as a control lever for a regulatory resistor designed so that it switches on more or less resistance in a circuit depending on the size of its deflection. The resulting voltage fluctuations call on a galvanometer connected to the circuit above ground or the like. A lesser or greater rash emerges from which the Size of the pendulum swing and thus the size of the deviation of the borehole BEzw. the lower part of the drill string can be determined from the vertical.

So the value of the invention is that the drill master can see all the time can whether the lower part of the linkage is vertical or not, so that when indicates a deviation by a deflection of the galvanometer, immediately the Necessary preventive measures can be taken by first looking at the ordinary known type determined by lowering a lockable compass needle the direction in which the borehole deviates from the vertical and then the borehole is straightened.

The invention is illustrated in the drawings, namely:

Fig. Ι a vertical section through the device,

2 shows a schematic representation of the electrical connections,

Fig. 3 is a schematic representation of another arrangement of the same,

4 shows a section through another embodiment of the device.

The outer cylindrical housing A is made of metal so strong that it can withstand the pressure to which it is subjected in the borehole. In the tube A , a brass plate B bent after the jacket of half a cylinder is rotatably supported by means of two washers b ² , b ³ and two bearing screws £ ⁴ , b ⁶ between two bearing tips or screws b, b ^l. The bearing bolts

Claims (5)

b, bl are in metal disks α, α1, which j are fastened to the housing A by screws a ~, α3, and the bearing screw bl is isolated from the disk a1 by a bushing α14 made of ebonite or the like. The screw & 4, which is also isolated by an ebonite bushing bh from the metal disk b2 carrying it, is used to fasten a metal disk or plate α4. The bearing screws b, bx also serve to fasten metal disks a: \ a ° to the disks α, α1. At the top of the housing A, an ebonite disc C is attached by screws c2, which has two contact rings c, c1. Arms D, D1, which carry a rod E, are attached to the plate B. At the lower end of this rod a weight or a lead solder F is rotatably mounted by means of a bolt / in such a way that it can only swing freely in one plane. At the upper end of the lead solder a switching arm G is attached, which above has a platinum strip sliding over the contacts h of a known regulating resistor H. The movement of the lead solder F allows this switching arm G to describe an arc around the pin / or the center of oscillation of the lead solder F. The contacts h are isolated from one another by pieces hl made of ebonite or the like. Above the shift lever, the rod E carries the resistance coil J of the control resistor. The control resistor can be switched so that the movement of the switching arm G successively sends a free current through the network, the current is interrupted, a resistor is switched on, the current is interrupted, a free current is sent through the network, etc. (Fig. 2) . The circuit can also be such that started from a normal position with a maximum resistance and, when the switching arm G moves over the contacts H, the resistance is gradually switched off (Fig. 3), or that started from a minimum resistance the resistance progresses Movement of the shift lever is gradually increased up to a maximum resistance, d. H. the arrangement can be such that the resistance is gradually switched on or off, with a current interruption expediently taking place between each change in resistance. The rails c and c1 (Fig. 1), which conduct the electric stroni into the device, are connected by wires which, in turn, by means of a cable above ground with a number of primary or secondary electrical elements of a certain capacity, as well as with a galvanometer and a Normal resistance are connected. The size of the different resistances of the control resistor is determined with the help of the normal resistance, so that the deviation of the lead solder F from the vertical can be easily recognized from the size of the deflection of the galvanometer. The power supply to the control resistor takes place from the contact ring c through wire k, disk a5, screw b, screw δ4, disk a4 and wire Ar1, and the power supply to the lead solder respectively. the switching lever takes place from the contact ring c1, through wire Ar2, washer αΆ, screw b \ screw £> ° and brass plate B. The wire k2 is expediently insulated through a groove in the housing. Counterweights M, Mx made of lead or the like are attached to the rotatable sheet metal B in a known manner in order to achieve a safe rotary movement of the sheet metal when the device is inclined and thereby a safe deflection of the switching lever. The upper end of the housing A is provided with an internal thread m into which a cable head, which is used to attach the device to the cable end, is screwed. In Fig. 4, another embodiment of the device is shown. In this case, three lead solders F are rotatably arranged on the vertical rod E and are connected to one another in an articulated manner by connecting rods f1. Instead of three such lead plumb bobs F one can of course also use two, four or more. Godfather ν τ-Α ν Proverbs: 1. A device for determining the deviation of boreholes from the vertical, in which the deviation is indicated by a pendulum swinging freely in a rotatable frame, characterized in that the pendulum (G) is designed as a switching lever of a control resistor and voltage changes in its deflection a line network, the magnitude of the voltage changes being indicated by a GaI vanometer or the like, and the magnitude of the deviations being determined from it. 2. Apparatus according to claim 1, characterized in that the control resistor is switched so that the movement of the pendulum BEZW. the shift lever one after the other a free current, a power interruption, a resistance, a power interruption, a free stream, an interruption, then causes resistance, etc. 3- device according to claim ι, characterized characterized in that the control resistor is switched so that the resistor is gradually turned off or. switched on with a power interruption occurring between each stage. 4. Apparatus according to claim 1, characterized in that the control resistor (H) with the about a bolt (f) rotatable, loaded by a weight (F) shift lever by means of a rod "^ and two arms (D, D ¹ ) on one Sheet metal (B) is attached, which by means of two washers (V ¹ , P) and two screws (c ⁴ , b ^r> ) is rotatably mounted between screws (b, P) , which are fixed in two washers ( A) in the housing (A). a, a ¹ ) , the screws (P, P ) being isolated from the washers (V ² , a ^[). 5. The device according to claim 1, da- ao characterized in that a plurality of lead solders (F) are rotatably attached to the rod (E) carrying the control resistor and the shift lever and are connected to one another by articulated rods (f ¹ ). 1 sheet of drawings.