Rigless Platform for P&A

From equipment to a service-based model

The rigless solution proposed by CT4 offers a step change in offshore P&A services by providing 80% time saving vs current technologies.

Main Features

Submarine system designed for well completions and P&A remotely operated
from a regular MPSV-Multipurpose Supply Vessel

  • AUV operated automatic tool changer carousel;
  • Multi-Casing Well Inspection & Imaging System;
  • High performance for riser milling and/or flatpack cutting plasma-based tool;
  • Rock-2-Rock plugging by Thermite;
  • Ultra lighter BOP for safety barrier;
  • Project aligned with the ANP requirements for R&D.

In-well Early Kick Detection Warning System

Getting a low cost in-well EKDW

The industry is seeking alternatives for bottom hole Early Kick Detection by using ultrasonic and/or magnetic sensors but the drill pipe non-concentric movement into the riser and particles variation during drilling are big challenges for these kind of measurement techniques.


  • Use available While Drilling Data avoiding new components introduction;
  • Simple and scalable for any equipment vendor and/or service provider.


The low cost in-well EKDWS® proposed by CT4 offers a step change in well control and cost savings by providing:

  • Real-time detection of changes within the wellbore while drilling;
  • Improved safety system for human lives and environment avoiding impacts associated with loss of well control;
  • Minimum CAPEX for system install;
  • Significant cost savings due to less drilling downtime for flow checking;
  • Two year ANP eligible R&D Project by having CT4.0 as local project leader.

CRT*: Ultra Compact Positive Displacement Multiphase Pump


Our partner has an unique platform for Centric Reciprocating Technology (CRT™) machinery enabling high efficiency pumps (CRP™) and compressors (CRC™) to capture markets where robustness, and footprint are strongly required.

CRT™ Working Principle & Main Features

This positive displacement centric reciprocating pump is a step change for boosting and pumping for both : topside and or/subsea application by the following major advantages:

  • Higher Reliability (no-valves, less components in contact with fluid);
  • High flow rate (power density**);
  • High efficiency at partial and full load;
  • High temperature operating range;
  • Lubricant free;
  • Multiphase flow handling;
  • Low noise and vibration;
  • Easy to maintain and repair (modular design, rugged components);
  • Low cost for in-well, seabed and or skid mounting;
  • Enabling technology for Supercritical CO2 pumping;
  • Project Proposal fully aligned with the ANP requirements for R&D (ANP03/2015).

(*) Centric Reciprocating Technology
(**) 3x more than rotating 6x more than centrifugal

Relief Well Intersection

Relief Well Drilling: Customer Challenge

  • Active Magnetic Ranging Technology is today only available as a Wire Line operation – in case access to wellhead is blocked by a fire or prohibited for any reason;
  • In case a Relief Well is needed, multiple WL-runs are required to intersect, maybe as many as 10-20 runs depending on complexity;
  • This represent significant time spent, increased operational risk and associated cost in addition
    to potential excessive damage to the environment.

Solution Architecture: Active Power Ranging While Drilling Tool (APR)

An Active Power Ranging While Drilling Tool (APR) for relief well drilling. The new system will provide a digital ranging technique, using both wired-pipe or conventional drill-pipe which will eliminate the need for open-hole wireline logging/ranging runs.


  • Up to 80% less time spent drilling a relief well – improved drilling efficiency!
  • Significant reduction in potential oil spill to the environment (sea).
  • Improved safety for both people and equipment.
  • Reduced cost.

Well Construction and Plugging

Well Integrity and P&A: Customer Challenges

  • Cement strength development at Low temp (<30oC);
  • WOC at Low temp (<30oC);
  • Cement degradation at High temp (>90oC) and corrosive environment;
  • Cementing of salt formations;
  • Cement has kind of permeability;
  • Cement flexibility;
  • Poor bonding to casing, sandstone and shale.

In addition:

  • Portland Cement produces approximately 900 kg of CO2 per ton of cement!
  • 8% to global CO2 emission!

SolidRock: A Sustainable Alternative to Portland

  • Is a environmentally friendly solution that has equal or better properties compared to the Portland cement: 70% less CO2 emissions – no calcination in the process;
  • Uses waste residuals from the mining industry as the main ingredient.
  • Can be engineered for several applications were Portland cement is used today.

Main Advantages

  • Can create ~1/1000 of the cured cement paste permeability;
  • Less than 1% shrinkage;
  • Temperature stable;
  • Durable;
  • Saved time WOC;
  • Cap rock permeability;
  • Hydraulic seal ability;
  • More ductile compared to Portland cement;
  • Avoid risk of gas invasion (RAS);
  • Inert to salt formations.

Seismic for Shallow Water Flow Detection

Shallow Water Flow Detection and Seismic by AUVs

Studies have shown that 70% to 80% of the costs on offshore Seismic, Drilling and Completions are time related (*), suggesting that compressing in the cycle time will have a strong benefit on the bottom line. The solution is a wireless seismic system with unique deployment, underwater positioning for data acquisition and recovery features which may reduce survey time in between 30 till 50% when compared with current technologies.

We are working in partnership to fit this solution to the purpose on detecting Shallow Water Flow in deepwater fields.


Wireless Autonomous Navigation and Powerful Online Data Transmission

All system in std Containers

Autonomous Steering & control of nodes for accurate positioning

High data quality enabled through excellence seabed and node coupling

Nodes recovery through ballast release

Surface recovery from conveyor parking system

Increased efficiency – lower cost
Unmatched deployment spped compared to ROV by using gravity as propulsion. Reduced number of vessel sail lines due to multi-drop.

Improved data quality
Superior node connectivity and seabed coupling – improved resolution.

Positioning accuracy
Online node communication & control ensuring precise positioning.

Operational robustness
Autonomously controlled nodes avoiding reliability and noise issues with cable deployment nodes.

Flexible and scalable system
Limited vessel requirements due to containerized solution: no need for special handling equipment onboard.