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  3. Welltec A/S

Welltec A/S

Well completion, intervention and integrity technology

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  • Gydevang 25, Allerød, 3450, DenmarkSupported by Company profile
  • Completion packersSupported by welltec.com
  • ISO 9001Supported by Public evidence

Explore Welltec A/S

Capabilities

WAB for Well Construction & Integrity (Welltec Annular Barrier) tool illustration

Completion packers

Metal expandable packers provide well-construction, zonal and abandonment isolation.

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Well Tractor tool illustration

Conveyance and lateral access

E-line and coiled-tubing tools for extended-reach and multilateral wells.

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Well Cleaner Power Suction Tool illustration

Cleanout and deposit removal

Debris recovery, jetting, honing, milling and targeted plug heating.

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Well Miller hardware milling illustration

Milling and plug setting

Controlled hardware milling and non-explosive plug and packer setting.

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Wellgrab CLAW illustration

Fishing and well diagnostics

Measured recovery operations and downhole sensor or camera assessment.

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Welltec Springblade Patch illustration

Downhole isolation and well integrity

Annular remediation, thin-wall patches and retrievable reservoir barriers.

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Flanged high-pressure test-loop equipment at the Esbjerg facility

Geothermal and CO₂ testing

High-temperature completion engineering and Esbjerg corrosion/component testing.

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Axter Lateral Miller tool illustration

Tubular cutting and P&A preparation

Non-explosive cutting, pressure communication and partner robotic control-line retrieval.

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WFV - DP (Dual Position) tool illustration

Completion flow control

Valves and actuators regulate zonal production and injection.

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Welltec Expandable Anchor (WEA) for Casedhole Plug tool illustration

Expandable anchoring

Metal expandable anchors secure plugs, packers, liner hangers and tieback liners.

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Well Stroker illustration

Valve and sleeve actuation

Hydraulic stroking and engagement tools manipulate downhole valves and sleeves.

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Services

Annular-integrity remediation

Price on request

Targeted casing expansion to remediate annular leakage.

CO₂ material and component testing

Price on request

CO₂ corrosion and component testing at the Esbjerg Test Flow Loop.

Service area
Testing at Esbjerg, Denmark

Coiled-tubing conveyance

Price on request

Coiled-tubing reach extension using fluid-driven tractors.

Completion design and deployment

Price on request

Engineering and deployment of expandable completion assemblies.

Downhole fishing and retrieval

Price on request

Measured retrieval of plugs, cables, toolstrings and irregular objects.

Downhole hardware and scale milling

Price on request

Controlled milling of downhole hardware, scale and restrictions.

E-line conveyance services

Price on request

E-line conveyance into deviated, horizontal and multilateral wells.

Geothermal completion and remediation

Price on request

Completion engineering and remediation for geothermal wells.

Plug-and-abandonment preparation

Price on request

Tubular cutting and robotic intervention for abandonment preparation.

Plug and packer setting or retrieval

Price on request

Non-explosive setting and retrieval of plugs and packers.

Reservoir isolation and temporary barriers

Price on request

Retrievable barriers for reservoir isolation and water shutoff.

Tubing and casing leak remediation

Price on request

Wireline repair of tubing and casing leaks.

Valve and sleeve manipulation

Price on request

Controlled manipulation of downhole valves and sleeves.

Well cleanout and deposit removal

Price on request

Recovery and removal of wellbore debris and deposits.

Well diagnostics and imaging

Price on request

Downhole imaging, hardware identification and pressure/temperature diagnostics.

Customer cases

Milled gate-valve component shown in the Congo case

TotalEnergies

Gate-valve milling offshore Congo

Welltec developed and tested a custom locating bit, then used Well Miller CVF from an RLWI vessel to mill an Incoloy 925 gate valve and recover the coupon. Milling took 17 hours and enabled Christmas-tree replacement.

View sourceView related listing
Saturn Expander photo accompanying the three-well case; contextual equipment image

Sustained casing pressure remediation in three Asian wells

Three anonymous Central/East Asian operations used Saturn casing expansion to densify existing cement. One gas injector fell from 92 bar to zero SCP, maintained for two years, allowing a planned sidetrack to be cancelled; other wells had different residual pressures.

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Springblade sample accompanying the European repair case; contextual technology image

Springblade repair in a European gas well

A Springblade patch sealed tubing-to-annulus communication below a safety valve. The repair passed a 180-bar test with 4.62 mm measured ID reduction, and production restarted within 24 hours.

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Crew handling intervention equipment on a deck in the Norwegian cleanout case

Proppant cleanout in the Norwegian North Sea

Well Cleaner PST recovered more than two tons of proppant over 43 runs, switching from High Flow to Large Drawdown. This enabled leak verification and plug setting; the planned coiled-tubing operation was cancelled.

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Recovery equipment shown in the Norwegian cable-fishing case

Cable, plug and BHA recovery in Norway

Three planned runs used imaging, Wellgrab CLAW, an overshot and Well Stroker to recover curled cable, a stuck plug and BHA. Production resumed after a four-month shutdown.

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Crew working on tubular equipment in the geothermal relining case

Relining an acid-damaged geothermal well in the Philippines

An adapted 812WAB supported cement and casing during relining of a shut-in geothermal well. Deployment used water cooling to keep temperature at or below 212 °F; production temperature was 545 °F. These describe separate operating phases.

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Springblade sample accompanying the Alaska case; contextual technology image

Tubing-connection repair in Alaska

After retrieval of an existing patch and Wishbone Honer cleaning, a Springblade Patch sealed a leak at 5,000 ft. A 172-bar test held for 30 minutes with no pressure loss and a 7 mm ID reduction.

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Well Tractor equipment accompanying the fibre-conveyance case; contextual tool image

Fibre-optic conveyance in Pennsylvania

Well Tractor CVT conveyed a fibre-optic rod into a 13,100-ft lateral of a 21,000-ft measured-depth gas well. Monitoring continued for three days; more than four hours were saved against alternative conveyance.

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Two sleeve components shown in the Ullrigg test case

TotalEnergies

Axter P&A integration test at Ullrigg

Welltec and Axter participated in a TotalEnergies-initiated test at Ullrigg, co-financed through the NORCE P&A programme. One run scanned, milled, cut and retrieved a control line; a second placed two bridging sleeves. Operational time was under 12 hours. This was a test, not completed field abandonment.

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DAR illustration accompanying the field-trial announcement; not a photograph of the installation

Equinor

DAR field-trial installation at Johan Castberg

Forty DAR assemblies were installed on 9 April 2026 across 12 compartments in a 1500 m horizontal open-hole interval at Johan Castberg. This was the start of a field trial.

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CO₂ and brine corrosion testing for Danish CCS projects

A 720-hour semi-stagnant test simulated formation-water flowback during long-term shut-in, using 50 vol% brine at downhole pressure and temperature. Impurities were replenished every 48 hours, with crevice corrosion, stress corrosion cracking, pH and oxygen monitored.

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Certifications and standards

  • ISO 9001

    Quality management certification by DNV-GL, maintained through audits across the Welltec group.

    View source
  • API specification certification: Esbjerg and Brazil

    API specification certifications at the Esbjerg and Brazil sites; the group programme covers Q1/Q2 requirements. Individual licence-to-site mapping is unspecified.

    View source

References

View source
  • INEOS Energy: awarded intervention contract

    Welltec announced a three-year intervention contract on 1 September 2026 for offshore Danish fields using Welltec and alliance partners. Retained as a contract relationship; completed work and results are not documented in this source.

Credentials and recognition

  • 2025 OWI Downhole Innovation Award: Wellgrab

    Downhole technology innovation award for the Wellgrab platform.

    Read more

About Welltec A/S

Welltec develops and deploys completion, conveyance, mechanical intervention, fishing and well-integrity technology for oil, gas and geothermal operators. Danish operations include intervention manufacturing in Allerød, completion manufacturing in Esbjerg and an Esbjerg CO₂ test facility. Services combine application engineering, specialized downhole tools and field execution, with selected partner technologies integrated into the offering.

Founded
1994

Location

  • Allerød: Gydevang 25, Allerød, 3450, Denmark
Profile detailsShow detailsHide details

Works with

Industries
Oil and gas, Geothermal energy, Carbon capture and storage

Applications

Well construction, Zonal isolation, Well intervention, Well integrity, Geothermal wells, CO₂ component testing

Materials

Steel, Stainless steel, Corrosion-resistant alloys

Processes

Completion engineering, E-line intervention, Coiled-tubing conveyance, Metal expansion, Corrosion testing

Service areas

International

Technical details

WAB for Well Construction & Integrity (Welltec Annular Barrier) - Construction base-pipe range
7⅝–18⅝ in Depending on tool configuration.
WAB for Well Construction & Integrity (Welltec Annular Barrier) - Construction expansion range
9.5–23.5 in Depending on tool configuration.
WAB for Zonal Isolation - Zonal-isolation base pipe
4½–7 in Depending on tool configuration.
WAB for Zonal Isolation - Zonal-isolation expansion range
5.75–10 in Depending on tool configuration.
WAB with Control Line Feed Through - Feed-through option
Up to six ¼-inch control lines Depending on tool configuration.
WAB for Well Construction & Integrity (Welltec Annular Barrier) - Published temperature
Up to 500 °F Application-specific product table; not a group-wide rating.
Welltec Annular Isolation - Base-pipe range
4½–7 in Depending on tool configuration.
Welltec Annular Isolation - Expansion range
6–10 in Depending on tool configuration.
Welltec Annular Isolation - HNBR configuration temperature
150 °C
Welltec Annular Isolation - Qualification
ISO 14310 V3 Product configuration qualification.
WLP for Zonal Isolation (Welltec Light Packer) - Zonal differential pressure
1,500–3,000 psi Depending on tool configuration.
WLP for Well Construction (Welltec Light Packer) - Published temperature
320 °F Depending on tool configuration.
WLP for Well Construction (Welltec Light Packer) - Qualification
ISO 14310 V6 Depending on tool configuration.
Welltec Expandable Anchor (WEA) for Casedhole Plug - Casing range
6⅝–13⅝ in Depending on tool configuration.
Welltec Expandable Anchor (WEA) for Casedhole Plug - Anchoring force
300–600 klbf per sleeve Depending on tool configuration.
Welltec Expandable Anchor (WEA) for Casedhole Plug - Temperature range
30–160 °C Depending on tool configuration.
WFV - DP (Dual Position) - Temperature
Up to 150 °C; DP configuration
WFV DP: burst and collapse pressure
5000–10000 psi; configuration-specific burst and collapse ratings
Downhole Actuator for WFV - Nominal OD
5.79 in
Downhole Actuator for WFV - Maximum temperature
257 °F
Welltec Isolation Valve - Base pipe
4½ in
Welltec Isolation Valve - Burst/collapse pressure
10,000 psi
Welltec Isolation Valve - Qualification
ISO 14310 V3
Density Activated Recovery - Maximum temperature
150 °C
Density Activated Recovery - Maximum working pressure
10,000 psi
Density Activated Recovery - Maximum differential pressure
1,450 psi
Welltec Magma geothermal packers - Temperature range
260–300 °C Depending on tool configuration.
Welltec Magma geothermal packers - Base-pipe range
4½–9⅞ in Depending on tool configuration.
Welltec Magma geothermal packers - Working pressure
5,000–10,000 psi Depending on tool configuration.
Well Tractor - Standard family completion ID
2.2–18.2 in Depending on tool configuration.
Well Tractor NG CR - Compact configuration length
9.5 ft Depending on tool configuration.
Well Tractor NG CR - Compact configuration temperature
257 °F Depending on tool configuration.
Well Tractor CVT - Nominal OD
2½ in
Well Tractor CVT - Maximum well pressure
20,000 psi
Well Tractor CVT - Maximum temperature
365 °F
Coiled Tubing Well Tractor - Nominal OD
2½ in
Coiled Tubing Well Tractor - Maximum flow
1.7 bbl/min
Coiled Tubing Well Tractor - Tandem force
Up to 7,000 lbf Tandem arrangement; not single-tool force.
PipeSnake Flow Through tractors - Running ID
4.1–5.1 in Depending on tool configuration.
PipeSnake Flow Through tractors - Pull-force range
1,764–10,582 lbf Depending on tool configuration.
Lateral Intervention Tool - Nominal OD
2⅛ in
Lateral Intervention Tool - Minimum junction deviation
30 degrees
Lateral Intervention Tool - Maximum wellbore ID above junction
8.5 in
Well Cleaner Power Suction Tool - Completion ID
2.2–12.6 in Depending on tool configuration.
Well Cleaner Power Suction Tool - Single-bailer volume
0.5–4.6 US gal Depending on tool configuration.
Well Cleaner Downhole Jetting Tool - Nominal OD
3⅛ in
Well Cleaner Downhole Jetting Tool - Single-bailer volume
1.85 US gal
Well Cleaner Downhole Jetting Tool - Completion ID
3.5–9 in Depending on tool configuration.
Well Cleaner Dry Environment - Body OD
2½–3½ in Depending on tool configuration.
Well Cleaner Dry Environment - Maximum temperature
302 °F
Reverse-circulating milling and cleanout - Bit sizes
2.35–7 in Depending on tool configuration.
Reverse-circulating milling and cleanout - Three-bailer volume
1.08–3.4 US gal Depending on tool configuration.
Well Cleaner Wishbone Honer - Engaged tool OD
2.4–7.9 in Depending on tool configuration.
Well Cleaner Wishbone Honer - Maximum well pressure
25,000 psi
Welltec Auger HDR - Nominal OD
3⅛ in
Welltec Auger HDR - Three-bailer volume
3.4 US gal
Aarbakke Stoker Hydrate Melter - Power adjustment
0.5–4 kW Depending on tool configuration.
Aarbakke Stoker Hydrate Melter - Claimed hydrate removal rate
Up to 4 m/h Depending on well conditions and plug composition.
Well Miller hardware milling - Tool OD
2⅛–3½ in Depending on tool configuration.
Well Miller hardware milling - Minimum completion ID by configuration
2.25–3.6 in Depending on tool configuration.
Well Miller with Expandable Bit - Expandable-bit minimum completion ID
3.25 in Depending on tool configuration.
Well Miller with Expandable Bit - Expandable-bit maximum OD options
5–6.2 in Standard options; custom designs available.
Well Miller CVF - Applied force
Up to 5,000 lbf
Well Miller CVF - Force increments
100 lbf
Well Miller CVF - Nominal OD
3.25 in
Well Cutter - Pipe OD cutting range
2⅞–9⅝ in Depending on tool configuration.
Well Cutter - Pipe-wall range
0.5–1 in Pipe metallurgy and well conditions dependent.
Welltec Puncher - Tool OD
2⅛–3⅛ in Depending on tool configuration.
Welltec Puncher - Hole-diameter range
0.47–0.96 in Depending on tool configuration.
Well Stroker - Push/pull force
5,000–100,000 lbf Depending on tool configuration.
Well Stroker - Repeatable stroke
8–14 in Depending on tool configuration.
Well Key Friction Grip - Friction-grip completion ID
2.4–6.2 in Depending on tool configuration.
Well Key (HEX) - High-expansion maximum reach
Up to 6.5 in Depending on tool configuration.
Axter Lateral Miller - Typical P&A window
200 mm Depending on tool configuration.
Axter Lateral Miller - Lateral Miller tubing size
4½ in Depending on tool configuration.
Axter Lateral Miller - Lateral Miller maximum temperature
257 °F Depending on tool configuration.
Wellgrab overshots and spears - Platform target engagement
Up to 13,000 lbf
Wellgrab overshots and spears - Platform bidirectional force
Up to 100,000 lbf Dependent on complete toolstring configuration.
Casing Collar Locator - Maximum temperature
500 °F
Casing Collar Locator - Maximum well pressure
20,000 psi
Welltec Hardware Scanner - Maximum logging speed
12 ft/min
Welltec Hardware Scanner - Maximum completion ID
7.5 in
Pressure and Temperature sub - Pressure measurement
15–15,000 psi Depending on tool configuration.
Pressure and Temperature sub - Pressure resolution
0.008 psi Accuracy is separately ±3 psi.
Pressure and Temperature sub - Pressure accuracy
±3 psi
Streamview Pro downhole cameras - Nominal OD
2.125 in
Streamview Pro downhole cameras - Maximum well pressure
15,000 psi
Streamview Pro downhole cameras - Maximum temperature
257 °F
Streamview Pro downhole cameras - Recorded downview
Full HD at 30 fps Real-time transmission has a lower frame-rate specification.
Welltec Setting Tool - Maximum delivered force
55,000 lbf
Welltec Setting Tool - Stroke
14 in
Welltec Electrical Setting Tool - Maximum output force
35,000–50,000 lbf Depending on tool configuration.
Welltec Electrical Setting Tool - Operational force
30,000–40,000 lbf Depending on tool configuration.
Welltec Electrical Setting Tool - Maximum temperature
275 °F For exposure up to six hours.
WDX-WAB wireline packer activation - Tool OD
3⅜ in
WDX-WAB wireline packer activation - Maximum WAB setting pressure
7,000 psi
WDX-WAB wireline packer activation - Expansion fluid
Well fluid excluding mud
Welltec Saturn Expander - Casing range
4½–13⅜ in Depending on tool configuration.
Welltec Saturn Expander - Maximum temperature
212 °F
Welltec Saturn Expander - Maximum well pressure
10,000 psi
WDX Internal Patch - Nominal tubing application
5.5 in
WDX Internal Patch - Maximum ID reduction
0.24–0.28 in Depending on tool configuration.
WDX Internal Patch - Maximum leak hole
0.6 in
WDX Internal Patch - Burst pressure at maximum leak hole
8,700 psi
WDX Internal Patch - Expansion fluid
Brine only; no mud or drilling fluid
Welltec Springblade Patch - Tubing range
3½–6⅝ in Depending on tool configuration.
Welltec Springblade Patch - Published ID effect
4–10 mm Application-dependent; layer thickness is not final diameter reduction.
Welltec Springblade Patch - Metallurgy
EN 1.4310 2H / AISI 301 2H
Welltec Springblade Patch - Temperature
104–250 °F Application and transport requirements dependent.
ODIN HPHT retrievable bridge plugs - Differential pressure at V0
10,000 psi
ODIN HPHT retrievable bridge plugs - Differential pressure at V3
15,000 psi
ODIN HPHT retrievable bridge plugs - Maximum temperature
300 °F
ODIN HPHT retrievable bridge plugs - Qualification
API 11D1:2022 V0-R/V3-R; ISO 15156:2020 Product configuration qualification.
TORDEN high-expansion retrievable plugs - Casing families
4.5, 5.5 and 7 in Depending on tool configuration.
TORDEN high-expansion retrievable plugs - Differential pressure
3,000–4,000 psi Depending on tool configuration.
TORDEN high-expansion retrievable plugs - Maximum temperature
230 °F
TORDEN high-expansion retrievable plugs - Qualification
ISO 14310 V0/V3; optional NACE MR0175
VALI medium-expansion retrievable plugs - Casing families
4.5 and 5.5 in Depending on tool configuration.
VALI medium-expansion retrievable plugs - Maximum differential pressure
7,500 psi
VALI medium-expansion retrievable plugs - Maximum temperature
300 °F
VALI medium-expansion retrievable plugs - Qualification
ISO 14310 V3

Related categories

Auger cleanout toolsAutonomous inflow-control devicesCalibrated dual-position flow valvesClaw fishing toolsCoiled-tubing tractorsDownhole honing toolsDownhole jetting toolsDownhole thermal plug removal tools

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Updated Sep 13, 2026

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