Ground instruments

The resistivity logging probe is used to measure formation resistivity and obtain formation electrical parameters.

Induced polarization (IP) logging is an important method in borehole geophysical work for metal and non-metal minerals.

Magnetic logging measures magnetic component anomalies inside the borehole via magnetic sensors.

Acoustic logging measures the acoustic characteristics of rock formations along the borehole section, i.e., the propagation and attenuation laws of ultrasound in rock.

Density logging is a nuclear logging method based on the Compton scattering effect.

Gamma logging measures the total natural gamma ray count, used for formation division and lithology identification.

Borehole temperature logging is used to measure fluid temperature variation inside the borehole.

Flow logging is used for fluid flow velocity measurement in boreholes in hydrogeology, geology, coalfield, oil and other industries.

Caliper logging measures the borehole diameter by mechanical-arm contact.

The deviation probe is used to measure the inclination angle and azimuth of the borehole.

Cementing quality multi-parameter combination logging can simultaneously measure multiple parameters in a single run.

Neutron logging is a nuclear logging method.

The multi-parameter combination logging probe integrates multiple measurement functions.

The formation mineralization logging probe can simultaneously provide two conductivity logs, corresponding to formation conductivity curves within the 'middle' and 'deep' radial ranges of the borehole. In permeable formations, after borehole fluid replaces the in-situ formation fluid, an invaded zone with different electrical parameters is formed, making formation mineralization logging particularly effective. The probe has high stability and an extremely wide dynamic range, enabling accurate conductivity measurement in sandy-clay layers and highly mineralized sandy formations. Unlike other resistivity probes, the induction logging probe can be used in dry holes and non-metallic casing wells.

Litho-density logging is an improvement and extension of density logging. In addition to recording rock density, it also measures the formation photoelectric absorption cross-section index Pe, which is related to lithology. During logging, the downhole instrument separately records the higher-energy and lower-energy parts of the scattered gamma rays. The scattered gamma ray intensity in the higher-energy part depends on density; the lower-energy part is mainly related to lithology and also to density; after processing, Pe can be obtained.

The fluid sampler is a probe with an electric valve installed on its chamber. Before the probe is placed into the borehole, the valve remains normally closed; the winch lowers the probe to the specified depth, the computer activates the electric valve on the probe via software, and after the chamber is filled with fluid, the electric valve on the probe is activated again via software to keep it normally closed, then the probe is retrieved and the manual valve at the bottom is used to pour out the sample

The water quality detection probe combines multi-parameter sensors, equipped with 6 sensors to measure: pressure, temperature, conductivity, dissolved oxygen, pH and redox potential. The probe is specially designed for groundwater and environmental geological surveys; it uses reliable, accurate, drift-free high-quality sensors to record a continuous profile of fluid properties inside the borehole.

The geothermal gamma combination logger combines pressure, borehole temperature, temperature gradient and natural gamma measurement parameters into one, improving logging efficiency. It adopts a cableless logging measurement method; field logging equipment is lightweight and simple to operate. The digital geothermal logger is designed for a maximum temperature of 250℃/6 hours and a maximum pressure resistance of 100MPa, suitable for high-temperature deep holes.

The geothermal resistivity deviation probe is a multi-purpose, high-efficiency combination logger. One run can simultaneously measure borehole temperature, inclination, azimuth, lateral resistivity and other parameters. Resistivity measurement adopts focused current, reducing the influence of borehole fluid and low-resistivity layers on calculated resistivity, making the measured apparent resistivity closer to the true formation resistivity. Through the measured inclination and azimuth, parameters such as borehole curvature eccentricity, horizontal displacement, and vertical distance can also be calculated.

The GELS-WCH series logging cable winch is dedicated equipment for geophysical exploration and geological survey. It is mainly used with integrated digital logging equipment, and can also be used with other logging equipment. The GELS-WCH series winches are mostly magnetically shielded design, with stepless speed regulation and automatic cable arrangement. Their performance is suitable for various geological exploration fields. They can be used in plateau (altitude ≤5500 m), land, offshore and other environments for geophysical exploration and geological survey work.

The GELS-WCH3 winch controller is mainly used to control the speed and direction of the electric winch, and to display the depth and speed of the cable.