JJY-3D 3-Arm Caliper Probe | Geotech Instrument Co., Ltd.

PRODUCT PARAMETERS

The motor retracts and extends the borehole arm, and monitors the entire retraction and extension process, which is safe and reliable.
t can be used in combination with the FD-3019 gamma logging tool. The measured borehole diameter and liquid level information can be used as correction parameters for gamma logging data.

GET A QUOTE

Description

FAQ

Get A Quote

Description

Abstract

JJY-3D 3-Arm Caliper Probe is a caliper that measures with a mechanical arm contact method. The three caliper arms are connected to the zero temperature drift linear sensor through a dynamic seal piston, which converts the caliper change into a digital quantity and then transmits it to the ground through encoding. It is also equipped with a liquid level detection electrode to detect the liquid level depth in the borehole. Liquid level depth information and caliper information are important parameters for hydrological survey logging.

Applicable Conditions

● Bare hole fill with water or mud

● Bare Dry hole

Applications

● Rock formation integrity assessment

● Location of cracks and caves

● Calculation of borehole volume before cementing

● Drillhole diameter measurement and correction calculation in conjunction with other well logging

Features

● The motor retracts and extends the borehole arm, and monitors the entire retraction and extension process, which is safe and reliable.

● t can be used in combination with the FD-3019 gamma logging tool. The measured borehole diameter and liquid level information can be used as correction parameters for gamma logging data.

Specifications

Well diameter measurement method	Three-arm linkage, Contact type
Well diameter measurement range	Φ40~300mm
Measurement error	1.5% F.S
The opening method of the well diameter arm	Controlled by ground command, and the motor executes the retracting and retracting command
	Nuclear industry quantitative gamma FD-3019 probe interface (special order required)
Signal output	Bipolar encoding

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?