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OVERVIEW

SPECTRUMSM Intervention Services optimizes coiled tubing well intervention by providing critical real-time data from a customizable bottomhole assembly (BHA). Unlike standard coiled tubing jobs where surface-measured parameters, such as pipe weight and circulating pressure, are the only available data, SPECTRUM Intervention Services delivers real-time subsurface insight from where the treatment is being applied, along with data from the surrounding downhole environment.

This modular system can be configured to deliver key measurements (such as pressure inside and outside the tool, temperature, depth from casing collar locator and gamma ray, inclination, tool face, tension/compression and torque), resulting in the ability to maximize a single trip downhole and adapt to near-wellbore conditions in real time to optimize fluids and tool performance. The information is transmitted to surface via telemetry systems, such as fiber optic, with no impact on overall service execution. The data can be used to measure what is going on below the surface, as a detailed snapshot or as a more comprehensive trend over a certain period of time.

HOW IT WORKS

Data transmission from the BHA is established via a selection of wired or wireless telemetry systems. The compact size of the wired telemetry allows all regular operational parameters – including pump rates, tolerance to corrosive fluids, and ball-drop capability – to be maintained with minimum added weight for road transportation or offshore lifting purposes. The BHA includes flow-through tools that accommodate sensors rated to 350°F (175°C) and 15k psi absolute pressure. At surface, the information is processed to allow visualization in the operator’s control house, as well as broadcasting via satellite communication to global users. This capability permits customers, subject matter experts, and decision makers to be simultaneously and immediately alerted to current downhole events and to quickly arrive at informed decisions on the most appropriate course of action.

ADVANTAGES

By using real-time data, SPECTRUM Intervention Services reduces uncertainty during operations and increases reliability by keeping coiled tubing tools and equipment in their optimal operating envelope to avoid failures. For example, depth is accurately controlled with the casing collar locator and gamma ray technology, helping to eliminate doubts on where to perforate or set a packer. Real-time temperature monitoring improves insight of downhole conditions and allows optimization of chemical treatments. The modular system of sensors can be combined and customized to meet the demands of the most complex coiled tubing operations.

APPLICATIONS

• Milling
• Manipulating mechanical tools
• Wellbore cleanouts
• Unloading
• Fishing
• Perforating (tubing-conveyed perforating and hydrajetting)
• Multilateral entries
• Stimulation accuracy
• Conformance (water or gas shutoff)

ADVANTAGES

•  Help improve reliability and reduce nonproductive time
•  Invisible to coiled tubing operations
•  High flow rate capability
•  Chemical-resistant
•  Real-time decision-making capability
  

FEATURES

•  Fiber-optic, wireless, or electric cable
•  Depth correlation with casing collar locator (CCL)
•  Depth correlation with gamma ray (GR)
•  Internal and external pressure and temperature
•  Tool face and inclination
•  Torque, tension, and compression
  

RATINGS

• 350°F (175°C) » 15,000 psi
  

SPECTRUMSM INTERVENTION SERVICES ENABLES ACCURATE DOWNHOLE MOTOR POSITIONING AND FLAWLESS OPERATION ON CRITICAL WELL MILLOUT

OVERVIEW

Milling interventions are often necessary to remove restrictions in a well for optimum efficiency of routine or special operations, while minimizing downtime without incurring any costly damage. In this case, an operator in Saudi Arabia was preparing to sidetrack a critical gas producer well, which first required milling out of a tubing nipple restriction in order to allow subsequent deployment of the whipstock.

A coiled tubing operation was planned, using SPECTRUMSM Intervention Services’ real-time sensing bottomhole assembly (BHA) to maintain accurate depth control throughout the milling process, with an essential goal of preserving the integrity of a close-by packer in order to avoid pulling the completion string. With SPECTRUM Intervention Services, the millout was accomplished without damaging the packer, thus preventing the operator from having to pull the completion string with a workover rig.

CHALLENGES

The prior operator’s experience had demonstrated inherent risks and inefficiencies related to inadequate milling performance, due to frequent motor stalling and extra time on location. Improving operations and tool performance would require two key elements: 1) Monitoring the coiled tubing depth in real time to assist accurate positioning in order to efficiently mill the nipple, and 2) optimizing proper operating conditions of the downhole motor while milling out the restriction to help prevent nonproductive time (NPT) and job delays.

SOLUTIONS

Halliburton used SPECTRUM Intervention Services with a modular BHA on coiled tubing, customized for collecting real-time data with sensors for depth correlation via a casing collar locator and pressure monitoring across the motor. Leveraging the real-time measurements being delivered to surface operations, the team accurately identified the nipple position by correlating depth while also preventing motor stalling – further minimizing millout time and avoiding extra trips to replace damaged components.

The use of SPECTRUM Intervention Services’ real-time data resulted in an efficient operation that achieved the customer’s objectives, while significantly mitigating the risk of unintentionally damaging the packer. Additionally, the transparency of downhole conditions and tool performance led to a significant improvement in overall results compared to similar operating environments.

RESULTS

Real-time pressure and depth measurements allowed the operator to control and optimize weight on bit and pump rate during the job, resulting in improved reliability of the downhole motor and optimized milling performance.

The operator achieved its objective of milling the restriction without damaging the packer or having to pull the completion string, thus saving potential associated workover rig costs by being able to deliver the entire operation via SPECTRUM Intervention Services’ real-time coiled tubing services.