ARCADIO GREGORI S.L., present in the industrial field since the 1980s, develops and manufactures seismic equipment for analysis of the seabed.

Subsurface analysis

The cone penetration test (CPT) is a geotechnical test that involves the controlled insertion of a cone penetrometer into the ground using a series of push rods. During the penetration process, accurate measurements of the cone resistance are made and the friction in the sleeve is recorded. In the case of the piezocone penetration test (CPTU), pore pressures around the cone are also measured.
The results obtained through the cone penetration test are commonly used to perform evaluations in the following areas:
1. Soil stratification: The test identifies the layers and characteristics of the subsoil.
2. Soil behavior: It provides information on the response of the soil to loads and loading conditions.
3. Geotechnical parameters: Calculates and evaluates key properties such as density, strength, deformation, consolidation, hydraulic conductivity and groundwater pressure, being useful in geotechnical design.

Although originally used for the creation of offshore infrastructure, platforms, mineral or oil exploration, it is now used by renewable energy companies for the design of renewable energy companies for the design of foundations for offshore wind turbines, a costly and necessary process in the development of offshore wind farms.




Maintenance - Repair

We are experts in machinery and industrial systems engineering. We cover a wide range of sectors and technical complexity levels.

We have a highly qualified and multidisciplinary team, including electrical technicians, senior programmers, certified welders, and industrial mechanics. Our team supports our ability to effectively and safely take on industrial projects of any scale.
37-Exchange and Process


Perfect transformation

We offer industrial overhaul and transformation services for advanced machinery, going beyond mere repair, thereby optimizing your equipment.

We achieve an increase in efficiency, productivity, and the lifespan of industrial assets, providing tangible solutions that exceed our clients' expectations.



At Arcadio Gregori, we understand the importance of precision in acquiring data for your geophysical equipment.

That's why we offer a specialized high-precision calibration service designed to ensure the reliability of your research and engineering projects.



We offer an industrial storage service that provides complete peace of mind and tangible benefits.

We take care of preventive maintenance to ensure that your assets remain operational, saving you costly downtime.



Submarine equipment for the generation of seismic waves. Currently we have a design model that can operate up to depths of 300 meters.

Containerized laboratory

20’ reefer type container fitted out as a workshop and laboratory for the analysis of samples obtained in the ocean.


Winches with constant auto tension electric drive in high sea. Frame prepared for handling by forklifts.

Cone Penetration Test technology

Laboratory equipped with lances calibration table used in the CPT analysis (Cone Penetration Test).



Equipment for analysing and calibrating CPT lances.


Equipment to accurately check and calibrate the sensors fitted to the CPT seismic lances.

ARCADIO GREGORI S.L. is in continuous development to integrate new sensors and applications in addition to its more traditional uses.

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Seismic sources can provide individual pulses, generating seismic waves that travel through a medium such as water or rock layers. Some of the waves are reflected, refracted and recorded by receivers, such as geophones or hydrophones. These sensors, in the form of a lance, are nailed to the subsoil by drilling equipment.


Mobile maritime laboratories are used to carry out the on-site study of the parameters collected by CPT equipment. Recorded signals undergo specialized processing and interpretation to obtain understandable information about the subsoil.
The modular design of the container allows us to adapt it to the most demanding customer needs during manufacture.


Outstanding features:
Umbilical cable weight: 1.1-1.2 kg/m
Maximum traction force 11kn (first layer)
General dimensions (approx. 2000 x 1700 x 2000 mm)
Helicoidal gear box
8 ISO 1161:1984 corner castings with rotating lock
Working load limit with 4 lifting points.

Cone Penetration Test technology

The static penetration test allows determining the continuous pressure required to introduce the cone, the lateral friction and the pore pressure. With those parameters, it is possible to determine and characterize the types of soils present in the subsoil
The elements are deposited on the seabed from the seismic vessel by means of a crane and its corresponding steel cables, as well as controlled from on board.


Extremely stable, high-strength carbon steel frame.
Painted using powder paint system, solvent-free heat stable coating conferring a high quality coating.
Vibrating system by means of an external electrical vibrator consisting of an electrical motor housed in a robust cast housing with eccentric weights fitted at both ends of the axle.
Robust CPT lance fastening system. Adjustable position and lightweight.
Variable frequency drive motor. Permits easily and conveniently regulating the motor speed. Maximum efficiency and control of the lance vibration simulation process.
Easy access and operation control panel. Configurable work cycles.
Powered at 230V AC, 50-60 Hz. Two power outputs, 24V and 15V DC.


• Entirely constructed from AISI 316 steel. Robust design.
• Fitted with a high performance manual pressure pump (100 bar).
• Compatible with all CPT lance manufacturers on the market.
•The test fluid works in a closed circuit, without any leakage possibilities.
• Transportable in a strong duralumin case (included).
• Environmentally friendly since it does not require any oils or other pollutants.


El ensayo de penetración estática permite determinar de forma continua la presión necesaria para introducir el cono, el rozamiento lateral y la presión de poro. Con estos parámetros es posible determinar y caracterizar los tipos de suelos presentes en el subsuelo de forma continua.
Los elementos son depositados en el fondo marino desde el buque sísmico mediante una grúa y sus correspondientes cables de acero, así como son controlados desde a bordo.


• Chasis de acero al carbono de alta resistencia y gran estabilidad.
• Pintado mediante sistema de pintura en polvo, recubrimiento termoestable exento de disolventes, obteniéndose un revestimiento de alta calidad.
• Sistema vibratorio mediante un Vibrador eléctrico externos, consiste en un motor eléctrico alojado en una robusta carcasa en fundición, con pesos excéntricos colocados en ambos extremos del eje.
• Robusto sistema de sujeción de la lanza. Regulable en posición y ligero.
• Motor accionado mediante variador de frecuencia. Permite regular la velocidad del motor de una manera sencilla y cómoda. Máxima eficiencia y control del proceso de simulación de la vibración de la lanza.
• Panel de control de fácil acceso y maniobra. Ciclos de trabajo configurables.
• Alimentación a 230v ac 50-60hz.Cuenta con dos fuentes de alimentación de salida, 24v y 15v dc