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environments which contain up to 25 % of hydrogen sulphide
and carbon dioxide.
The recording length on pressure for all models of downhole
pressure gages DPGU (МСУ) is 50 ± 5 mm and the recording

length on time is 120 mm.

11.2.3 Remote-control downhole pressure gages

By the way of transmission of the measured pressure magnitude
downhole pressure gages are divided into downhole pressure gages
with the local recording pressure change in the well (on the diagram

blank) and remote-control downhole pressure gages. Such devices
as URCDPG-1 (УДГМ-1), RCLPGP-2М (ДЛПМ-2М), RCDPG-32
(МГД-32) and others are remote-control downhole pressure gages.

Remote-control downhole pressure gage URCDPG-1 (УДГМ-1)
is the measuring complex which consists of: 1) downhole tool
(downhole pressure transformer) which is the helix with a rheostat

sensor; 2) cable; 3) the recording device which is set up on the surface
(electronic bridge of EBD-202 (ЭМД-202) type). Remote-control
downhole pressure gage URCDPG-1 (УДГМ-1) is applied for remote-

control pressure measuring in pumping oil wells.
Remote-control downhole pressure gages are produced by such
companies as Schlumberger, companies from USA Kuster and
Amerada (GRC), Leutert (Germany), Hubei Jianghan Petroleum

Instrument & Meter Co., Ltd (China) and others.
In particular, the company “Schlumberger” produces down-
hole pressure gages Unigauge which are used for recording pressures

in the wells with different downhole characteristics. They are
characterized by high reliability. They can measure pressures up
о
to 147 МPa under the temperature up to 200 С.
For conducting researches with formation testers for recording the

downhole parameters of the wells company “Schlumberger” most
often uses the system DataLatch together with the group of downhole
pressure gages Unigauge and cable. While using downhole pressure

gages Unigauge monitoring the testing process at real time is
possible. The quartz and sapphire sensors such as CQG quartz,
Quartzdyne quartz, H sapphire, sapphire and VH sapphire are used as

the sensors in the downhole pressure gages Unigauge.

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