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STANDARD HANDBOOK OF PETROLEUM & NATURAL GAS ...

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930 Drilling and Well Completions<br />

Surface Recordings<br />

of Pressure Signals<br />

I<br />

Pulse Ring<br />

Fitting<br />

Shaft<br />

Signaling Knob<br />

Pulse Ring Tube<br />

Instrument Housing<br />

Upper Support<br />

Angle Range<br />

Adjusting Collar<br />

Coding Rod<br />

Stop Ring Assembly<br />

Pendulum<br />

Seat<br />

Orifice Block Assembly<br />

Lower Housing<br />

Lower Support<br />

DRILLING<br />

(B)<br />

CODED FOR<br />

MINIMUM<br />

ANGLE<br />

(C)<br />

CODED FOR<br />

MINIMUM<br />

ANGLE + 2"<br />

(D)<br />

CODED FOR<br />

MAXIMUM<br />

ANGLE<br />

1 SIGNAL<br />

2 SIGNALS<br />

7 SIGNALS<br />

Figure 4-240. Teledrift mechanism in various coding positions. (Courtesy<br />

Teledrift, lnc. [ 1 041.)<br />

Angle<br />

Range<br />

Table 4-1 22<br />

Teledrift Angle Range Settings<br />

Deviation Angle in Degrees<br />

1 signal 2 signals 3 signals 4 signals 5 signals 6 signals 7 signals<br />

0.5-3.0 0.5 1 .o 1.5 2.0 2.5 3.0 3+<br />

1.0-3.5 1.0 1.5 2.0 2.5 3.0 3.5 3.5+<br />

7.5-10.0 7.5 8.0 8.5 9.0 9.5 10.0 1 o.o+

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