SU142596A1 - Borehole inclinometer - Google Patents

Description

Borehole inclinometers are known for monitoring the curvature of a well during its drilling with an electrical drill, in which time is used — a pulsed telemetry system. c) these inclinometers are very complex, which reduces the reliability of their work.

The described inclinometer lip1en of this drawback due to

using simple phase sensors made up of selsins and

associated with their rotors sensitive elements of the pendulum tin1.1

 An inclinometer is used to continuously measure two.

angles: the angle of deviation of the borehole axis from the vertical and the angle between the plane of curvature of the well and the tool deflector.

The direction of the azimuth of the curvature of the well is made according to the simultaneous measurement of the specified angles with the help of two identical sensors, which are exchanged at some distance from each other, by the method of successive strokes.

The drawing shows a block diagram of the described inclinometer, -: -

In the downhole tool, at a certain distance from each other, there are two identical nullcomilects / a. And 2.I.

In each half-size of the room, there are two sensors 3 corners with sensitive elements of the type connected to the phase-angle I

mountains (village) - /. The latter transform the angle of rotation of the hub into a pronoriopic change in the electrical phase of a sinusoidal voltage. The voltage taken from the phase shifters controls the operation of the frequency modulator 5, which changes the frequency of the thermometer-f

generator 6. Signal from the generator through connecting 1

filter 7 enters the link, which is used as the

electric drill wire 8. The instrument cluster is equipped with a power supply unit 5 and a switching unit / O. The latter connects f in turn

or M250G

to ial sv.chk to one ii.Tti to the other sensor. For iinT; i) iiisi, the instrumental pedals (; iMi. (IiiH) i) (|) l: i1 utr () ite.1 / // are applied in class MoI.

K ,, i.ch i.chmsrymyh (I arpmot |) () 1 p; if) 0incT on the region of C (iii Kciipoistiiiiiiiii), which is according to the pasto shiPi moment intends to.

(1C ycrpoiu.to 12 is connected to the lanes of the si nrnnoditelnye (shlyr 7 .. (for example, HH signals (|) opMaiuiii through narrow-band usn; igg.ch./7 gun. Go to the frequency detectors 15 b. Point 16 cngFalliz i n ) l. / 1tectors transform frequency-modulated CHiTia.i I) r1mn.pudo-mod.trooGy (, cohorts1 through block 17 commutFH1 goes to am11LI1udn1, n dschch-ktor 18, and from there to the input IJIHIHiHi1nn, n dschch-ktor 18, and IJIHIHiHiHiHiHiHiHiHiHiHiHiH1H1HiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiHiO11 ) Optel 20, converting single-phase) wife ciirna.ia pnfor.matsp in tre, x (}) Asia. This voltage is fed to the input 1P1 (|) differential (|) (replica og | pmereia circuit 21. Parallel input is IT) of the circuit 22 is supplied from the power supply unit 22 and (|) azutroiter 23 standard signal, the phase of which is assumed to be zero.

By means of an alarm unit 46 on the power supply of the indicated devices, a light bulb is lit corresponding to the relevant parameter.

For switching deep probes, as well as for full depth switching (of the first arrangement (call generator 24 fixed frequency is provided).

GSSseyuz1P, 1Y research ppstnutut geophysical methods of exploration L1 of the Institute of Geology and Subsurface Safety C1SSR notes the usefulness of the proposed pplinometer and the simplicity of its design compared with the known similar devices.

PRIOR DIRECTORSHIP and

Snip-up inclinometer, mounted in a string of drill pipes above the drill, using the current wires of the latter as a communication line and frequency modulation methods for transformation (1) of the information signal, including a stepping switch for a sequential measurement, taken from sensors the curvature and orientation of the instrument, characterized in that, in order to increase the reliability of the inclinometer, the phase-rotation devices (for example, selsyns) associated with the sensing elements are used as sensors tanty type.

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