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Coiled Tubing Perforating

Coiled Tubing (CT) provides additional perforating capability and flexibility over other conveyance systems. The rigidity and strength of CT allows enduring greater tensile and compressive forces, which is a major operational advantage when perforating in highly deviated and horizontal wells or with longer gun strings.
CT perforating is ideal for live wells; pressure control techniques are used to run long gun strings and either drop off or retrieve the guns without having to kill the well.
In subsea wells, the subsea lubricator defines the length of gun that can be run. With other wells, the surface riser or surface lubricator valve determines the length of gun. The CIRP deployment system can be used in conjunction with CT to deploy and retrieve guns under pressure.
In depleted wells where drawdown is insufficient, nitrogen can be circulated at convenience to lighten the overall fluid column, increasing the drawdown at the zone of interest. The resulting pressure differential is similar to that produced by gas lift systems.
For accurate depth control, CT wired with integrated electrical cable is run in combination with a casing collar locator and a gamma ray detector. Optional real-time and memory sensors for pressure and temperature are used to monitor the required underbalance.
There are several ways to activate guns run with CT: hydraulic delay firing heads; drop ball firing heads; eFire-CT firing system using circulation rates; or electrically using "stiff-wire" CT, where an electric line cable is run through the CT to enable firing the guns in a similar manner to a wireline job.
Stiff-wire CT allows the use of standard wireline correlation tools. Hydraulic CT allows stimulation fluids to be pumped without the risk of damaging a wireline cable.
An additional specialty gun is the pump-over gun. This gun allows circulation through a special sleeve on the outside of the gun to the bottom of the string. The pump-over gun is used during fracture operations in horizontal wells to save a cleanout trip between fracturing and perforating the next interval.

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Data Acquisition for Coiled Tubing

Our product portfolio includes all the tools and services you need for efficient and effective coiled tubing (CT) interventions.

CoilCAT Real-Time Treatment System

Informed Real-Time Decision Making at a New Level of Confidence

The CoilCAT wellsite service makes Well Services well intervention operations even more efficient and reliable. It combines a state-of-the-art data acquisition system, the coiled tubing sensor interface (CTSI), with the universal tubing integrity monitor (UTIM) and software that merges design, execution, and real-time evaluation capabilities.

CoilCAT advantages

  • Allows job preparation in advance
  • Reduces set-up time
  • Permits real-time job redesign to account for unexpected conditions
  • Provides the coiled tubing (CT) operator with visual information on the wellbore and CT string
  • Tracks key parameters and links them to operational alarms
  • Computes the CT limits at all times, displays the operating point within those limits, and warns when the limits are approaching
  • Updates the string life in real time, based on direct data input, and stores it with the string
  • Generates a treatment report on location

CoilCAT software features

  • CoilLIMIT CT pressure/tension limit model
  • CoilLIFE CT life prediction model
  • Well animation
  • Customizable plots

Wellsite Connectivity for Coiled Tubing Operations

InterACT connectivity, collaboration, and information system reduces operational, travel, and personnel costs with real-time, secure, coiled tubing (CT) data directly from the job site to the desktop. Using a standard Web browser and a simple Internet or intranet connection, the system connects your experts securely anywhere in the world during the job to improve efficiency.
Used with the CoilCAT computer-aided treatment software, the InterACT system makes CT data available on an embedded graphical and numeric display. A wide range of operational parameters can be displayed, including an historical weight-pressure-rate plot; a tubing forces overlay plot; depth correlations; and information on drilling, fracturing, and stimulation programs.
Real-time messages from the wellsite acquisition console can be transmitted, and automated postjob reports can be generated. Files, including daily reports, well programs, logs, and graphics can be exchanged during the operation.

Real-time operational decisions

During a critical CT intervention on Lake Maracaibo, Venezuela, the onshore team used the InterACT system to monitor and collaborate with the wellsite team. The well had a collapsed screen section at 10,478-ft measured depth. The objective was to set a permanent bridge plug and abandon a lower interval. A CT depth correlation log was used to provide accurate depth control.
During the job, an unexpected obstruction was encountered that altered the intervention program and objectives. With real-time access to the CCL log and CT operational parameters, the onshore team optimized and facilitated the decision-making process to make the appropriate corrections. The result was improved operational efficiency and reduced costs.


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Fracturing through Coiled Tubing

High-Pressure Coiled Tubing Services


CoilFRAC

CoilFRAC stimulation through coiled tubing (CT) incorporates specially designed bottomhole assemblies (BHAs). These assemblies isolate zones of interest selectively without expensive workover operations. They let you increase well production and recoverable reserves.

Stimulate multiple zones in a single trip, reducing your costs. Restimulate zones bypassed during the original completion. Now, you can consider zones that had less economical potential. Your entire field can be more productive.


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Coiled Tubing Equipment

Our new-generation coiled tubing (CT) equipment further increases the efficiency of these services. CT EXPRESS rapid-deployment unit has reduced rig uptime from 3 hours to less than 30 minutes. CT SEAS safer, efficient, automated solution has reduced operations from 3.5 days to 2.

CT EXPRESS

Coiled Tubing Technology Combines Speed and Efficiency

The CT EXPRESS rapid-deployment coiled tubing (CT) service is designed for low-pressure, intermediate-depth land-based wells. This service
  • combines capabilities of four trucks into two tractor trailer units
  • enables quick rig up and rig down
  • eliminates the need to work under suspended load or climb on unit
  • provides process control of CT and pumping functions
  • improves job efficiency, economics, and safety of operation
  • provides reliability over rough terrain and in extreme conditions.
The system is designed to complement CT operations with low pump rates, moderate pressures and nonstop pumping.
By electrically controlling the coiled tubing unit and pumps from the control chair, the unit provides better use of manpower, eliminating communication problems among operators.

CT SEAS

Offshore Coiled Tubing Unit Offers Flexibility and Efficiency

CT SEAS coiled tubing safer, efficient, automated solutions reduce the amount of time and the number of people needed. The CT SEAS highly flexible, fit-for-purpose unit is readily adaptable for many offshore structures, including platforms, floaters, and tension leg platforms. This high degree of flexibility gives you the full capabilities of a conventional coiled tubing (CT) unit.
A key philosophy driving the design architecture was the creation of safer, efficient, and functional skid packages. The system comprises just 10 primary skids, which reduce crane lifts from 53 to only 36 on a typical operation in the North Sea.
This reduction in lifts is achieved by delivering many components to the wellsite as assembled units. For example, riser and triple BOP components travel as preassembled and tested units, and the injector is assembled to the jacking frame and stripper with the gooseneck attached.

CT TComp

Offshore Coiled Tubing Total Compensation Package Increases Safety and Efficiency

CT TComp coiled tubing (CT) total compensation system for offshore protects wellhead integrity during CT operations by limiting wellhead stresses. The system compensates for vertical and horizontal wellhead motion inside or outside the derrick. Rig up is faster and requires less personnel than with conventional systems.
The system is preassembled in three skids, one each for the hydraulic power unit, BOP, and injector. Fewer than half the minimum number of lifts are required to load conventional equipment onto the platform. All components are delivered, installed, and tested within their frames without requiring unpacking or assembly. Virtually every feature is designed to save time and reduce costs.
The system can be used as
  • a motion-compensated jacking frame
  • a 350-ton tension-lift frame
  • an internally compensated tension.

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    Coiled Tubing Tools and Bottomhole Assemblies


    Advanced coiled tubing tools are necessary for implementing coiled tubing technologies. The CoilTOOLS portfolio of coiled tubing tools for standard bottomhole assemblies includes motor heads, connector checks, valve-disconnect assemblies, knuckle joints, fixed and hydraulic centralizers, fixed and rotary wash tools, nipple locators, gauge carriers, and a complete suite of downhole valves.

    PowerCLEAN Wellbore Fill Removal

    Improve Safety and Reduce Stuck-in-Hole Incidents with Efficient Cleaning

    PowerCLEAN engineered fill removal service cleans previously uncleanable tools at up to 325 degF. The service integrates an optimized jetting nozzle and cleanout fluids with job-planning software and real-time monitoring.
    This coiled tubing service can remove produced sand and fines, proppant left behind after fracturing, or excess gravel from gravel-packing operations efficiently and completely. Our service leaves the tools fully open for maximum hydrocarbon production and problem-free tool runs.

    Clean deviated and horizontal sections

    Significant amounts of fill are often left in highly deviated or horizontal tools sections when you use conventional cleanout nozzles. PowerCLEAN nozzle technology agitates the solids, entrains them in the cleanout fluid, and prevents particles from falling back past the nozzle.
    The result is quick and complete solids removal at lower flow rates than conventional nozzles allow. With the PowerCLEAN service, effective cleaning is possible at flow rates as low as 1 bbl/min for 7-in casing and 2 bbl/min for 9 5/8-in casing at any deviation angle.

    Increase simulation accuracy

    User-friendly PowerCLEAN software lets you optimize equipment, fluids, and job procedures. The optimized job design cuts costs by shortening cleanout time and reducing the fluid volume to be pumped.

    CoilFLATE Through-Tubing Inflatable Packer

    Reliable Zonal Isolation

    Designed for extreme conditions, the CoilFLATE coiled tubing (CT) through-tubing inflatable anchoring packer extends critical zonal isolation capability to previously inaccessible, chemically harsh, and high-temperature environments. The CoilFLATE packer eliminates the need for a workover rig because the packer is run on either coiled tubing or jointed pipe into vertical, deviated or horizontal tools. Remedial operations can be performed without killing the well.

    Applications

    By deploying the CoilFLATE packer, you can permanently abandon zones or temporarily isolate tools areas for tubing integrity testing, wellhead testing, and general pressure testing in openhole and cased hole wells. The packer's resistance against aggressive chemicals lets you selectively place treatment fluids for acid stimulation, water control, and chemical treatment.

    Safety

    The CoilFLATE design keeps the packer anchored in place, providing a reliable high-pressure seal at large inflation ratios (2:1 at 5,000 psi, 3:1 at 2,000 psi). It also allows extended assembly exposure at temperatures up to 375 degF under harsh tools conditions and in almost any chemical environment.

    Accurate depth control

    The CoilFLATE high-pressure, high-temperature (HPHT) system ensures absolute depth control via casing collar log correlation for optimum packer positioning.

    Vantage Coiled Tubing Logging Head System

    Designed to standardize electric-line coiled tubing (CT) connectivity, the Vantage CT logging head saves you rig-up time through reliability, modular interchangeability, and the unique design of the bayonet CT connector.
    Vantage can be used for mono-conductor logging applications as well as with most perforating configurations. The system's modular component concept connects with plug-and-play connections that physically and electrically couple the components. These connections enable rapid interchangeability and reduce nonproductive time. The use of the CT flush OD bayonet connector in combination with the Vantage termination tool enables pretermination of the electrical connection before the CT is stabbed through the injector head chains. Highly reliable, the Vantage system can perform multiple runs in hole without redressing.
    The Vantage system is designed for offshore, land, desert, and arctic environments and for oil, gas, and injector wells. It is rated for working pressure of 13,500 psi, maximum temperature of 375 degF, and maximum tensile strength of 40,000 lbm.

    Packers, Hangers, Plugs, and Accessories

    Packers and plugs are run to hydraulically isolate the sections above and below the packer and to provide a mechanical anchor to prevent the packer from sliding inside the wellbore. In coiled tubing (CT) completion applications, the packer also holds the CT string in place.
    Packers are set mechanically, hydraulically, or on wireline. The mechanical-set packer is set by applying either tension or compression on the packer. The hydraulic-set packer is activated by hydraulic pressure. The CoilTOOLS hydraulic set-packers can also be set on wireline.
    The CoilTOOLS suite of packers includes the entire range of packers and plugs used in wellbore treatments, selective stimulation, water conformance jobs, tubing integrity testing, CT completions, straddle repair installations, temporary or permanent well abandonment, and more.
    Whenever packers or plugs are run, the downhole hydraulic and mechanical situation must be known. The shear pin setting must be high enough to withstand the additional forces resulting from applied differential pressure, yet low enough to allow a safe release of the packer. An equalizing tool or unloader valve may be needed to safely unset the packers.

    Discovery MLT Multilateral Reentry System

    Controlled, selective entry on coiled tubing for multilateral wells

    Discovery MLT multilateral reentry system is cost-effective and operationally simple for maximizing performance of multilateral wells. The system sends a pressure signal to the surface confirming you've accessed the correct lateral.
    Adjusting the suborientation, or bend, from surface and the real-time feedback to surface of window identification save a substantial amount of time. This significantly increases the chance of successful reentry on the first attempt. Only one run to the bottom of the lateral is required for confirmation.

    Discovery MLT software

    Using Discovery MLT software, you can display several essential parameters, such as the tool orientation relative to the lateral window. The application also monitors previous indexes and guides you through indexing cycles for accurate, real-time information downhole.
    After the window is profiled, the software memorizes the window orientation and monitors the BHA orientation, facilitating the location of other windows.
    You can determine job feasibility with our CoilCADE CT design and evaluation software and monitor and record real-time data with CoilCAT acquisition software.


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    ACTive Live Downhole Coiled Tubing Services

    Increase the Accuracy & Effectiveness of Stimulation Treatments

    The ACTive family of coiled tubing (CT) services uses real-time downhole measurements to interpret and optimize treatments while they are still in progress. These real-time CT services give you the opportunity to monitor and evaluate job progress, to optimize treatment results, and to intervene with one trip in hole.

    Technology platform

    The system consists of a bottomhole assembly, surface electronics, and dynamic interpretation software. It delivers internal and external pressure, temperature, CCL depth correlation, and a distributed temperature survey (DTS).

    ACTive CT services for every application:

    • Matrix Acidizing

      ACTive Matrix — monitors injection rates and downhole pressure and temperature to allow maximum fluid penetration and diversion and to optimize treatment volumes.

    • Wellbore Cleanout

      ACTive Cleanout — uses differential pressure readings to avoid formation damage, reducing the number of trips and total operating time, and optimizing fluid volume and penetration rate into the fill.

    • Perforating

      ACTive Perf — achieves accurate depth control in a single run and ensures target coverage while controlling hydrostatic balance to avoid formation damage.

    • Zonal Isolation

      ACTive Isolation — achieves accurate depth setting, sealing elements operation, and fluid placement intended for performing temporary or permanent CT zonal isolation in a single run.

    • Lift Operations

      ACTive Lift — improves the CT nitrogen lift operation time and fluid efficiency by continuous monitoring of wellbore pressure while avoiding solids production.

    • DTS Profiling

      ACTive Profiling — enhances all ACTive services with DTS profiling to provide a 3D temperature profile of the entire wellbore to monitor treatment fluid placement and well production performance.

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      Coiled Tubing

      Coiled Tubing Services

      The Schlumberger innovative intervention services conveyed on coiled tubing (CT) are designed to improve your well and reservoir performance. CT applications include matrix and fracture stimulation, wellbore cleanout, logging, perforating, nitrogen kickoff, sand control, drilling, cementing, well circulation, and mechanical isolation.
      Our product portfolio includes all the tools and services you need for efficient and effective CT interventions.
      Live Downhole Coiled Tubing Services
      Tools and Bottomhole Assemblies
      Wellbore Fill Removal Service | Through-Tubing Inflatable Packer | Coiled Tubing Logging Head System | Packers, Hangers, Plugs, and Accessories | Retrieval and Fishing Tools | Multilateral Reentry System Coiled Tubing Equipment

      CT EXPRESS | CT SEAS | CT T
      Comp Fracturing through Coiled Tubing

      Coiled Tubing Perforating
      Data Acquisition