Century Geophysical LLC products

The Spectral Gamma tool model 7201 provides a three-channel analysis of the gamma ray spectrum focusing on potassium, uranium, and thorium content in geological formations. It utilizes an internal energy source of less than 1 micro-curie of Cs137 to excite the crystal and stabilize the electronics before logging. The tool captures the spectral window using a 256-channel spectrum board, enabling detailed analysis of different energy levels in the formation. Key benefits include fully downhole digital capabilities, quick automatic setup with unique tool identification, and the fact that it is designed for one-man operations. The tool can also be customized to meet specific needs. The device measures key properties such as potassium percentage and uranium and thorium parts per million at an offset of 135.63 cm. The tool's specifications include a length of 167 cm, a diameter of 60.96 mm, and an operational temperature up to 65°C. It is pressure-rated at 232 kg/cm2 and weighs 16.82 kg. The tool operates at a logging speed of 1.5 meters per minute and requires a voltage of 60 VDC.

The Natural Gamma Logging Tool 9012 is specifically engineered for obtaining natural gamma logs, essential for geological and geophysical analysis. This tool features a slim design, enabling it to be used in small diameter boreholes and allowing for logging through steel or PVC drill pipes with an inside diameter of 2 inches or larger. The gamma sensor is strategically located near the bottom of the tool, which enhances data acquisition even at the full depth of boreholes. Additionally, the tool supports 4p density recording when used with a spacer and a gamma source. Key specifications include a length of 128.9 cm, a diameter of 41 mm, and a weight of 7.46 kg. It can operate at temperatures up to 85C and pressures of 281 kg/cm2. The tool requires a voltage of 36 VDC and offers a logging speed of 9 meters per minute. These features, combined with quick automatic setup, unique tool identification, and simplified one-man operation, make it highly versatile and effective for diverse logging applications.

The Natural Gamma/Casing Collar Locating Tool (Tool # 9053) is designed for applications requiring natural gamma logging and casing collar location in boreholes. Its slim profile enables it to be used in small diameter boreholes and through steel or PVC drill pipes with an inside diameter of at least 2 inches. The gamma sensor is positioned near the bottom for data acquisition close to the borehole's total depth. This downhole digital tool has quick automatic setup and unique tool identification, supporting efficient, one-man operation. It features a magnetic coil casing collar locator with a 20 cm offset and employs an NAI scintillation detector for natural gamma measurements, offset by 114.3 cm. The tool specifications include a length of 118.9 cm, a diameter of 41 mm, weight of 7.46 kg, and it can operate under 85°C temperature, up to 4000 PSI pressure, at a logging speed of 9 meters per minute, requiring 36 VDC. This tool is fully customizable to meet specific requirements.

The Multi-Parameter E-Log Neutron Logging Tool is designed to succeed the historically popular 9055 model. It maintains all the functionalities of its predecessor while introducing additional capabilities such as the 16-inch normal, 64-inch normal, and lateral resistivity measurements. The 9057 model is equipped with a natural gamma circuit that features a low dead time, enabling it to record exceptionally high count rates, particularly beneficial for uranium logging applications. This tool can simultaneously log ten parameters in a single borehole pass, including natural gamma, spontaneous potential, single point resistance, 16-inch and 64-inch normal resistivity, 48-inch lateral resistivity, neutron-neutron interaction, temperature, delta temperature, slant angle (tilt), and azimuth (bearing). Additionally, slant angle, azimuth, and natural gamma functionalities are optional. The tool offers a fully digital downhole setup, quick automatic configuration, unique tool identification, and is designed for single-person operation. The logging speed is up to 9 meters per minute (30 feet per minute), and it requires 60 VDC for operation. It is built to withstand temperatures up to 70°C (158°F) and pressures up to 232 kg/cm2 (3000 PSI).

The 4000 stacked Gamma-Temperature-Telemetry Tool is designed to record natural gamma and temperature data while ensuring robust data transmission telemetry. This tool is compatible with other express stack tools and can be utilized individually or in conjunction with multiple tools. Its fully downhole digital capability allows for quick automatic setup and unique tool identification, necessitating assembly at the well site and allowing for customization to meet specific requirements. Key properties measured include natural gamma, with a scintillation detector of dimensions 2.9 x 10.2 cm and an offset of 25.4 cm. Temperature measurements are obtained via a thermal needle sensor with an offset of 115.57 cm. The tool has a length of 131.47 cm, diameter of 63.5 mm, and can withstand temperatures up to 126°C and pressure up to 350 kg/cm² (5000 psi). It weighs 18.37 kg and operates at a logging speed of 9 meters per minute. Tool number is 7201 and part number is 272000.

The Series 4239 In-Line Litho-Density Tool employs two focused density detectors to compute borehole compensated density in real time while logging operations are underway. It further utilizes a photoelectric reader to measure the amplitude of returning gamma pulses, allowing for direct lithology determination. This tool can differentiate between various rock types such as sandstone, limestone, dolomite, shale, and others, represented as an additional logging curve. It also provides caliper readings. The tool necessitates the use of the 4000 Stack Gamma Ray Tool Sub for required telemetry functions and is compatible with all other Express Stack™ Tools except the 4841(DIL). The tool is fully digital, supports quick automatic setup, possesses a unique tool identification, requires assembly at the well site, and can be customized to meet specific needs. Specifications include a length of 348.13cm, an operating temperature of 125°C, a diameter of 6.35cm, pressure tolerance of 350kg/cm2, and a logging speed of 9m/min.

The Full Wave Sonic tool by Century Geophysical is designed for recording formation travel times using a single transmitter and three strategically spaced receivers. This tool captures full waveform data, near, mid, and far travel times, borehole-compensated delta time, and calculated sonic porosity. Additionally, it records receiver gains, amplitude variations, and natural gamma. Operating on the principle of sound propagation through media, the system measures interval transit times over distances of approximately 3, 4, and 5 feet from the transmitter. Key features include a 24 kHz piezoelectric transmitter, thermoplastic polyester acoustic isolator, a diameter of 63.5 mm, and a length of 354.4 cm. It operates effectively up to 120°C and 5000 PSI, with a logging speed of 9 meters per minute. This downhole digital tool allows for quick automatic setup and unique tool identification, making it suitable for various custom applications in geophysical surveying.