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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.

Coiled Tubing

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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

Innovative interventions elevate the performance, efficiency, and results of CT operations in various types of well configurations. Services use real-time downhole measurements to interpret and optimize treatments while they are still in progress.

Tools and Bottomhole Assemblies

The CoilTOOLS portfolio offers advanced, reliable, one-stop CT solutions for all downhole equipment requirements.

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

Innovative CT solutions, supported by a wealth of experience and technology, offer unrestricted wellhead access.

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

Fracturing through stimulation of preperforated intervals through CT or work string involves a straddle tool to isolate each interval during stimulation treatment. This technique is used both for new completions and to access bypassed intervals.

Coiled Tubing Perforating

Coiled tubing allows perforating guns to be run into extended-reach or horizontal wells and also allows longer, heavier gun strings to be run.

Data Acquisition

Using accumulated drilling knowledge improves operational efficiency, better manages risk, plans smarter wells, and reduces cost overruns.

InterACT for Coiled Tubing Operations | Real-Time Treatment System

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Wireline Perforating

Wireline (or electric line) is the traditional way to run perforating guns, providing the advantages of real-time depth control and selectivity. Guns can be run either before the completion is run (casing guns) or through the completion (through-tubing guns). Today any type of perforating gun can be run on wireline including strip guns, casing guns, scallop guns, Pivot guns, Enerjet guns, TCP guns, or oriented guns. Many other explosive devices can also be run, including plug and packer setting tools, cutters, backoff bars, and severing tools.

Perforating Gun Systems and Charges

Schlumberger offers capsule and hollow carrier gun systems with a wide variety of perforating charges for every environment as before.

Completion Perforating

Completion perforating enables large, long strings of guns to be installed with the completion and fired with the right completion fluid in place for immediate cleanup and production.

After firing, the guns are normally dropped into the rathole or left connected to the completion, in which case production is through perforated tailpipe. Additional hardware such as automatic drop subs, shock absorbers, valves, and debris subs can be included in the string.

Before Completion Perforating

Perforating guns can be run before the completion to position guns that are larger than the ID of the tubing. In vertical or deviated wells, guns can be hung off in the liner using a MAXR anchor. When the guns are fired, the anchor automatically releases to drop the guns into the rathole.

In a monobore completion, the guns and anchor can also be recovered to the surface. In horizontal wells, guns can be placed in the horizontal section before the upper completion is run by using disconnect devices run below coiled tubing or drillpipe.

Completion Perforating Without Killing the Well

The CWOK process uses underbalance, dynamic underbalance (PURE), or extreme underbalance perforating for clean perforations, then removes the guns without killing the well.

A typical well kill may damage clean perforations unless very carefully designed pills are developed. CWOK includes the following techniques:

• Through tubing perforating (wireline or slickline)
• X-Tools to drop guns into the rathole
• FIV to isolate the reservoir and enable long gun strings to be recovered to surface
• CIRP to connect and disconnect long gun strings under pressure
• GunStack to run and stack guns on anchors

Other techniques include running isolation plugs through the completion in order to recover DST strings, and PerfPac, which allows completion of gravel packs without killing the well.

Slickline Perforating

Slickline can be used for perforating, setting plugs or packers, or cutting tubing. Slickline operations are normally fast and use simple pressure control equipment. Slickline units occupy a small footprint on rigs or platforms and can be transported easily.

The eFire-Slickline firing head is used to fire guns or initiate setting tools. This electronic device is simple to use and has many useful features including full operator control to arm, fire, abort, and rearm if needed.

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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Tubing-Conveyed Perforating

Tubing-conveyed perforating (TCP) completion techniques enable perforating very long intervals in one run—some TCP strings have exceeded 8,000 ft [2,440 m] in length—and in highly deviated and horizontal wells TCP is the only means of accessing to the perforating depth. TCP also facilitates running large guns and using high underbalance. When TCP is deployed in conjunction with drillstem test (DST) tools, well fluids can be easily controlled. Without having to kill the well, TCP strings can be retrieved (shoot and pull) or left as part of the permanent completion (integrated TCP).
TCP Applications
Your choice of tubing-conveyed perforating (TCP) string design will vary depending on your completion type: temporary, permanent, or workover. The strings listed below include only the most common components for different TCP applications. Your Schlumberger representative can advise you on the most efficient string configuration for your application.

1-Firing Systems

BCF Ball-Activated Firing Head

The small-diameter coiled tubing (CT) firing head is recommended for use in guns 49.9 mm (1.69 in) or smaller in diameter.
CBF Circulation Ball Drop-Activated Firing Head

The most commonly used CT firing head, the CBF is available with multiple adapters to accommodate various CT dimensions and gun sizes. The head is insensitive to water-hammer effects and vertical drops.
DFS Differential Pressure Firing System

The DFS activates the differential pressure firing head by using the pressure created between the annulus pressure above the packer and the cushion or sump pressure below the packer.
BHF Drop-Bar Hydrostatic Firing Head

The drop-bar hydrostatic firing (BHF) head has a firing pin that is driven by hydrostatic pressure and does not depend on the intensity of drop-bar impact. Its features minimize the possibility of accidental firing and prevent and release trapped pressure.
eFire Electronic Firing Head System

eFire electronic firing head systems for coiled tubing, TCP and wireline provide a more efficient and economical method for a wide range of downhole explosive operations.
EOFH Extreme Overbalanced Firing Head

The direct pressure-activated head is designed for no-delay firing and is used mainly in extreme overbalanced perforating operations.
HDF Hydraulic Delay Firing Head

The hydraulic delay firing head is an absolute-pressure-operated firing head.
ProFire Programmable Firing Head

The ProFire programmable firing head uses hydromechanical technology to precisely control gun firing time when multiple operations are performed under pressure.
Redundant Firing Systems

TCF Trigger Charge Firing Systems

The trigger charge firing systems are designed to offer maximum flexibility and control over the firing operation because the firing head is run separately from the gun string.
Absolute Pressure-Actuated Trigger Charge Firing System TCF-P | Drop Bar-Actuated Trigger Charge Firing System TCF-DB | Jar Down-Actuated Trigger Charge Firing System TCF-JD
USTP Universal Setting Tool with Propellant

The USTP is used to set downhole equipment such as packers, bridge plugs, and the MAXR automatic release anchor on drillpipe, coiled tubing, slickline, or wireline.

2- TCP and Completion Perforating Accessories

SXPV Automatic Production Valve

An explosive production valve synchronized to open as soon as the perforating guns fire.
Debris-Circulating Sub Accessory

The debris-circulating sub consists of a ceramic cone seated in a ported sub, usually positioned between the packer and the guns, typically 30 ft above the firing head.
DTRV Drop-Bar-Triggered Surge Valve

Pressure-operated valve used to isolate the rathole from the tubing.
eSleeve Isolation Valve

A production valve with multiple applications that is activated by tubing or annulus pressure.
SXVA Explosively Initiated Vertical Shock Absorber

Absorbs the shock of the guns as they are detonated to prevent damage to packers, gauges, adjacent gun strings, etc.
FIS Fluid and Debris Isolation Sub

The fluid/debris isolation sub is an enhancement of the standard cone-type debris-circulating sub for heavy mud environments or large amounts of debris.
FLUP Fill-Up Valve

The pressure-operated fill-up valve is open to the annulus, allowing the tubing to fill while going down.
Gun Swivel

A gun swivel allows the gun string to rotate with respect to the tubing string.
Last-Shot Detection System

Compatible with all firing heads.
POUV Pressure-Operated Underbalance Valve

Pressure actuation and operation.
Radioactive Marker Sub

Accurate gun depth positioning.

3- TCP Gun Release Systems

CTXR Closed Tubing Explosive-Actuated Release

Automatically drops tubing-conveyed perforating (TCP) guns at the instant of detonation to the well bottom after the guns are fired. When the guns are fired in a closed system in which the tubing pressure is less than the wellbore pressure, the CTXR gun release disconnects the TCP guns.
CTR Controlled Tension Release

Allows retrieval of the running assembly if guns become stuck. The CTR is a fullbore safety release device for TCP operations. Pulling on the string with a predetermined tension and holding this tension for a predetermined time actuates the CTR.
MAXR Auto Release Gun Anchor

Primarily used to anchor high-shot-density (HSD) gun strings in monobore wells. The MAXR can be run in the hole with either wireline or pipe and is set with standard setting equipment.
SXAR Automatic Gun Release

Automatically drops tubing-conveyed perforating guns to the well bottom after the guns are fired. A full-tubing opening exists after the gun string is dropped, and the tailpipe incorporates a muleshoe entry wireline guide. Firing heads and no-gos are dropped as one piece for easy fishing.
TCR Tubing-Conveyed Gun Release

Enables TCP guns to be dropped off the end of the running string, allowing access to the perforated zone for stimulation, production logging, squeezing, or additional perforating. After the guns have dropped, the release housing acts as a tubing reentry guide.
WXAR Automatic Gun Release with X-Tools Technology

Automatically drops perforating guns at the instant of detonation. The WXAR, which extends the length of the gun strings that can be conveyed into the well, can be run on for wireline, tubing, or coiled tubing. Use of the WXAR enables long intervals to be perforated at underbalanced pressure without killing the well

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Pipe Recovery and Remedial Services

Schlumberger provides several solutions for recovering casing, drillpipe, coiled tubing, or tubing.

After the free point is determined, stuck drillpipe can be loosened by using an explosive backoff or cut with severing or colliding tools.

Well completions can be recovered by using mechanical, explosive, electrical, or chemical cutters. Tubing can be cut in several places, but usually above the packer so that the packer can be milled and fished.

Third-Party Services

Schlumberger uses reputable third-party providers for many pipe recovery and remedial services. Contact your Schlumberger representative for more information.

• Casing and drillpipe cutters—Specialized explosive cutters are designed specifically for cutting casing (well abandonment) and drillpipe (stuck pipe recovery).

• Chemical cutters—Chemical cutters provide a clean cut for severing coiled tubing, drillpipe, and tubing.

• Mechanical cutters—Mechanical cutters are used to effectively cut casing, coiled tubing, drillpipe, and tubing when explosive or chemical cutters are not an option.

• Severing, colliding, and split-shot tools—Severing or colliding tools contain high explosive loads to rupture and split heavyweight drillpipe and drill collars for pipe recovery.

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Hollow Carrier Gun Perforating Systems

Hollow carrier guns are pressure-tight steel tubes in which shaped charges are positioned. For gun ODs of 2 7/8 in and larger, hollow carrier guns perform better than exposed guns because they use larger charges, optimized phasing, and increased shot density. Hollow carrier guns are also used when debris is unacceptable and in hostile conditions that preclude using exposed guns.

Schlumberger hollow carrier guns are designed as systems, comprising specific carriers, charges, detonating cords, and boosters, to provide maximum perforator performance. All Schlumberger gun systems are manufactured to our rigorous QA standards. The main types of hollow carrier guns are

PowerJet Omega

PowerJet Omega

PowerJet Omega deep penetrating shaped charge is the latest-generation PowerJet shaped charge from Schlumberger.

On average, PowerJet Omega shaped charges produce a 20% increase in penetration depth compared with the performance of previous-generation shaped charges. Performance is verified through the official American Petroleum Institute perforation registration program, API RP 19B. This deeper penetration translates to increased well production and injection, coupled with improved well efficiency for a positive impact on lifting costs.

The PowerJet Omega shaped charge is available for 2-in to 7-in HSD High Shot Density gun systems. HSD gun systems can be conveyed by wireline, slickline, tubing-conveyed perforating (TCP), coiled tubing, tractors, and permanent completions. PowerJet Omega shaped charges are also used with underbalanced perforating operations or the dynamic underbalanced technique of the PURE perforating system for clean perforations.

Benefits

• Penetrates past formation damage, increasing well productivity or injectivity
• Maintains deep penetration at high shot density
• Intersects more natural fractures

PURE Perforating System for Clean Perforations

"Dynamic underbalance" technique for increased productivity

Minimize or eliminate perforation damage and increase productivity

PURE Perforating for Ultimate Reservoir Exploitation system optimizes the well dynamic underbalance—the transient underbalance just after creation of the perforation cavity. The software specifies a unique perforating system and optimum completion process. This controls the optimum dynamic underbalance rather than relying on the estimated reservoir pressure. This technique has been successfully performed in hard- and soft-rock formations, oil and gas reservoirs, and sandstones and carbonates.

Improve operating efficiency

An Alaskan water injection well was performing below expectations. The 90 ft of perforations were taking 17,500 B/D. Analysis of the well and reservoir conditions by PURE design software resulted in a job design using 3 3/8-in. guns and PowerJet deep penetrating shaped charges.Although only a 20-ft section was perforated, the injection rate increased to 25,000 B/D. The injection pressure remained approximately the same or slightly lower. The injection profile shows clearly the PURE perforations were taking 93% of the total flow for an improvement of 493% in the contribution rate.Two low-permeability (1-mD) gas wells in the Weber formation of Wyoming were perforated with PURE technology at initial overbalances of 3000 and 3700 psi. Both wells flowed naturally at 5.5 and 3.8 MMscf/D, respectively, without the acid stimulation usually needed to obtain clean perforations. The wells were tubing-conveyed perforating permanent completions.

Benefits

• Minimize or eliminate perforation damage and increase productivity
• Enhance acidizing and hydraulic fracturing operations and treatment results
• Minimize disruption of the cement/sandface hydraulic bond

HSD High Shot Density Gun Systems

HSD High Shot Density guns feature increased shot density, optimum phasing patterns, and the largest high-performance charges available for natural, stimulated, and sand control completions. HSD guns use expendable, retrievable carriers, which means that once the gun system has been used, it is retrieved and disposed of. Deployment is primarily on wireline cable or tubing. Tractor conveyance can be used in deviated wells.

Port Plug Guns and HEGS High-Efficiency Gun Systems

Port Plug guns shoot the charges through replaceable plugs in a reusable gun carrier and feature highly flexible multiple-gun selectivity for remote operations, enabling the perforation of large intervals with minimal hardware.

OrientXact Tubing-Conveyed Oriented Perforating System

Precise orientation and confirmation technology

Maximize production

OrientXact tubing-conveyed oriented perforating system decreases costs and improves productivity with less sand production. Oriented perforating is an innovative solution for low-debris perforating in horizontal and highly deviated wells.

Prevent sand

The system minimizes tunnel diameter in the formation. This increases the strength of the tunnel and the number of effective perforating tunnels. Reduces pressure drawdown across perforated intervals and flow rate per perforation.

Improve performance

OrientXact uses PowerJet Plus low-debris, deep penetrating, steel-cased, weighted shaped charges. These charges minimize perforation damage with more stability during drawdown and depletion.

Gain from the experience

Schlumberger developed this technology at operator request. In the operator's North Sea wells, previous oriented perforating was as much as 45° out of the desired orientation; productivity decreased.

In just five months, Schlumberger engineers designed, tested and deployed a system to perforate in an aligned and oriented fashion while preventing sand production and maintaining productivity.

Realize accurate orientation

Successfully tested and qualified in dogleg severities as high as 10° per 100 ft. Achieve overall orientation accuracy within 10° in a wellbore independent of length or tortuosity.

Benefits

• Increase productivity
• Prevent sand production
• Reduce costs
• Achieve single-trip oriented perforating of long intervals
• Achieve larger effective wellbore radius
  

Frac Gun Perforating Systems

Frac Gun perforating systems are engineered for the fracture stimulation of wells, with additional applications in slimhole wells, sand control operations,