SU61962A1 - Instrument for continuous measurement of well diameter by depth - Google Patents

Description

Basically auth. St. 48028 describes a device for measuring the diameter of boreholes in depth, made in the form of two spring-pawed feet. To register the paw opening, one paw is connected with a fixed one, and the second one is connected with a movable contact of a notciometer. According to the potential difference between the movable and non-contact: contacts and it does not know the diameter of the well.

In the proposed device, the size of the paw opening is recorded by moving and stationary electrodes immersed in the drilling fluid. The diameter of the well is determined by the electrical resistance between the electrodes.

The drawing shows schematically the proposed device.

It consists of a conventional resistivity meter /, supplied with a non-slip electrode A and a movable electrode M. with a fastener with a movable carbolite tube 2, which is connected to steel legs 4 through legs 4. Paws 4 hingedly attached to a rigidly fixed joint cable 5, clutch 6, are under the action of flat springs 7 and screw tension springs 8, which tend to stick. to squalpsh walls. The springs are attached to the coupling 9, mounted on the cable 5.

The lower end of the resistimeter is mounted on the cone clutch 10, which serves to hold the paws 4 in the compressed position when the device is lowered into the well. The clutch is under the action of Springs, which seeks to move it down and release the lans 4.

The device with the load 12 suspended below is lowered into the well on the logging cable 5. P |) and this coupling 10 keeps the paws 4 compressed; The electrode M is then stationary, and the device can work as a normal resistivity meter. In the upper position, the clutch 10 is held by the spring-mounted J3 spring-loaded grips 14, the ends of to number 61962

They are clamped in the tube 15 of the valve 16 of the cylinder 17 and cannot diverge. The valve is under the influence of springs 18.

When lifting the knob upwards, the valve 16 from the water hammer overcomes the action of the spring 18 and slips down, freeing the ends of the grippers 14. The gripped grips 13 and the grips open, the coupling 10 under the action of the jersey 11 G1 and down, freeing the paws 4, which, depending on the diameter wells, open one or another value.

In proportion to the magnitude of the disclosure on the chain, iremode and the movable electrode L1. Define 5 Slip the electrical sonar of the mud between the Electrodamn. 4 and L), C;, d t about the diameter) e of the well.

In the drawing, the dotted line shows the position of the iodic parts of the device when it is raised.

Subject invention

Form of iolini 1 author St. L 48028, characterized in that the mobile and stationary electrodes immersed in the drilling fluid are used to detect the opening of the well in order to determine the diameter of the well from the electrical resistance of the drilling mud by the electrodes.