JFSW-H(W) Geothermal Probe| Geotech Instrument Co., Ltd.

JFSW-H(W) Geothermal Combination(Temperature&Gamma) Probe

PRODUCT PARAMETERS

The probe digitizes the measured formation information and transmits it to the surface in encoding, avoiding the influence of cables on the measured data.
Constant power and adaptive measurement, no manual operation is required.

GET A QUOTE

Description

FAQ

Get A Quote

Description

JFSW-H(W) Geothermal Combination(Temperature&Gamma) Probe

Abstract

JFSW-H(W) Geothermal Combination (Temperature&Gamma) Probe combines pressure, well temperature, thermal gradient and natural gamma measurement parameters into one, which can improve logging efficiency. It adopts the measurement method without logging cable, with a designed maximum operating temperature of 250℃/6 hours and a designed maximum pressure resistance of 100MPa, which is suitable for use in high-temperature deep holes.

Applicable Conditions

● Cased

● Bare hole fill with water or mud

● Bare Dry hole

Applications

● Divide stratigraphic interfaces and determine changes in stratigraphic facies

● Geothermal resources survey and research

● Determine the heat-producing layer, gas-producing layer, and soluble matter layer

● Geological disaster prevention and control engineering

Features

● It is realized by using platinum resistance sensor Pt-1000, which has high temperature measurement accuracy and good stability.

● The single chip microcomputer (MCU) automatically compensates the pressure zero drift according to the temperature change

● It is easy to use and the equipment is simple.

Specifications

Gamma ray detection sensor	Nal crystal + photomultiplier tube
Gamma ray detection and counting range	0~65000CPS;Accuracy: 5%F.S
Gamma ray detection energy threshold	≥0.06MeV
Well temperature measurement range	0~250℃;Well temperature resolution: 0.025℃
Temperature gradient measurement range	0.02℃/m~2℃/m(when measuring speed ~600m/H)
Well temperature measurement sensor	Pt-1000
Instrument pressure	≤80MPa; Instrument temperature resistance: -10℃~+250℃; Continuous working for 10 hours

FAQ

In gravity exploration (SI), what is the unit of gravity? How to convert gravity units between SI and CGS?

What are gravitational field and gravitational potential?

What is the normal gravity field of the earth? What are the rules for the change of the normal gravity field with latitude and altitude?

① The normal gravity field of the earth: Assuming that the earth is a rotating ellipsoid (reference plane), the surface is glossy, the internal density is uniform, or it is distributed in concentric layers, the density of each layer is uniform, and the deviation of the shape of the ellipsoid from the geoid is very small, then the gravity field generated by the earth is the normal gravity field.
② The normal gravity value is only related to the latitude, the smallest at the equator and the largest at the poles, with a difference of about 50,000 g.u.; the rate of change of the normal gravity value with latitude is the largest at 45° latitude, and zero at the equator and the poles; the normal gravity value decreases with increasing altitude, and its rate of change is -3.086 g.u.. The main feature of the long-term change is the "westward drift" of the geomagnetic elements, both the dipole field and the non-dipole field drift westward, and have a global nature.

What is the relationship between gravitational field strength and gravitational acceleration?

What is gravity exploration?