Product Overview
The Concentric Coiled Tubing Wash Tool (Multi-mode) is a multi-functional dual-pipe concentric wash downhole tool developed for concentric continuous coiled tubing well intervention operations, primarily applied to inner wall descaling, paraffin removal and sediment flushing of production tubing and casing.
This multi-mode concentric wash tool is specially designed for ultra-low-pressure reservoir wellbore treatment operations that cannot be handled by conventional circulation wash subs. It integrates three independent switchable working modes: Washing Mode, Jetting Mode and Forceful Vacuum Mode; construction crews can freely switch between modes simply by adjusting the surface pump flow rate without pulling the tool string out of the well, greatly improving operation flexibility and construction efficiency.
During working construction, clean fluid is pumped into the inner concentric coiled tubing; fluid flows through the built-in spiral flow channel and is accelerated to form high-speed swirling jet flow at the tool outlet. The powerful spiral jet fully stirs up sand sediment, hard scale and paraffin deposits attached to tubing and casing inner walls. All stirred suspended solid debris and mixed liquid pass through the integrated self-cleaning filter screen, then enter the annular space between inner and outer concentric coiled tubing, and flow back upward to the ground surface under vacuum negative pressure suction. The tool operates under ultra-low working pressure of 3MPa to minimize fluid injection pressure and effectively reduce formation damage to low-pressure sensitive reservoirs.
Two complete service grades are supplied to adapt diverse reservoir environments: STD standard grade for conventional sweet oil wells without hydrogen sulfide corrosive media; H₂S sour service grade manufactured with sulfur-resistant alloy to adapt high-H₂S corrosive sour gas well downhole working conditions.
The standardized product lineup covers two mainstream concentric coiled tubing size combinations: 2"×1" and 2-3/8"×1.25", with matched overall make-up length specifications, fixed standard working parameters of 80~90L/min flow rate and 3MPa maximum working pressure, equipped with dedicated concentric coiled tubing matching connectors for seamless assembly with mainstream concentric continuous coiled tubing assemblies and low-pressure reservoir wellbore cleaning downhole service tools. Custom concentric tubing matching specifications, spiral flow channel structural parameters and anti-sulfur passivation coatings are available upon customer technical drawing submission.
Complete Technical Specification Table
| PN Part Number | Concentric Coiled Tubing Spec | Make-Up Length | Working Condition Grade | Standard Flow Rate | Max Working Pressure |
|---|---|---|---|---|---|
| L2122010120 | 2" × 1" | 57" | STD Standard | 80-90L/min | 3MPa |
| L2122312120 | 2-3/8" × 1.25" | 62" | STD Standard | 80-90L/min | 3MPa |
| L2122010320 | 2" × 1" | 57" | H₂S Sour Service | 80-90L/min | 3MPa |
| L2122312320 | 2-3/8" × 1.25" | 62" | H₂S Sour Service | 80-90L/min | 3MPa |
Note: Custom concentric coiled tubing matching specifications, spiral flow channel structural parameters, anti-sulfur passivation coatings and non-standard length multi-mode concentric wash tools are available via engineering consultation.
Core Features & Advantages
Three Independent Switchable Working Modes Design: Integrates Washing Mode, Jetting Mode and Forceful Vacuum Mode all in one tool assembly. Operators can switch between different working modes on-site by adjusting pump flow rate without tripping the tool string out of the well, realizing one single tool to complete multiple wellbore cleaning treatment processes and greatly reducing operation cycle time.
Integrated Self-Cleaning Filter Screen Structural Design: Built-in self-cleaning filter assembly at the fluid return channel, which can block large solid debris while realizing automatic backwashing of the filter screen during circulation, avoiding filter blockage caused by sediment accumulation and ensuring long-term stable vacuum suction recovery performance.
Spiral Flow Channel High-Efficiency Rotary Jet Flushing Configuration: The internal flow channel adopts a spiral guide vane structural design; pumped straight fluid is converted into continuous high-speed swirling spiral jet flow at the tool outlet, realizing 360° full-circumference dead-zone-free scouring on tubing and casing inner walls, with stronger impact force for thick hard scale and compact sand sediment removal.
Vacuum Negative Pressure Suction Debris Recovery System: The tool forms stable vacuum negative pressure in the concentric tubing annulus during circulation operation; all stirred suspended sediment and debris are sucked into the annular space and continuously carried back to the ground surface, realizing one-step integration of washing, stirring and solid phase recovery without secondary downhole circulation flushing.
Ultra-Low Working Pressure Low Formation Damage Design: Fixed standard working pressure of 3MPa, matching 80~90L/min low flow rate construction parameters; the whole operation process adopts low-pressure fluid injection, effectively avoiding high-pressure fluid breakthrough damage to low-pressure sensitive reservoirs, suitable for all kinds of ultra-low-pressure formation wellbore treatment operations that cannot be constructed by conventional circulation wash tools.
Dual Working Condition Grade Configuration: STD standard version applies to conventional sweet oilfield non-corrosive working environments; H₂S sour service version adopts sulfur-resistant alloy base material and professional anti-sulfur passivation coating to resist hydrogen sulfide corrosion in harsh sour gas well conditions.
Standard Concentric Tubing Size Compatibility: Standard product series covers two mainstream concentric coiled tubing matching specifications: 2"×1" and 2-3/8"×1.25", fully compatible with global mainstream concentric continuous coiled tubing assemblies for all ultra-low-pressure reservoir well descaling and sand flushing intervention demands.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, concentric matching connector, spiral flow channel guide vanes and self-cleaning filter components, featuring outstanding high-pressure jet abrasion resistance, sediment erosion resistance and structural stability, extending long-term continuous low-pressure concentric CT washing service life.
Application Scenarios
1. Concentric continuous coiled tubing ultra-low-pressure sensitive reservoir tubing & casing inner wall full-circumference spiral jet descaling, paraffin removal and compact sand sediment recovery low-pressure downhole intervention treatments
2. Conventional sweet crude oil well concentric CT three-mode switchable integrated washing and solid debris recovery service (STD standard service grade)
3. High-H₂S sour gas well corrosive environment low-pressure reservoir concentric dual-pipe multi-mode spiral jet wellbore cleaning downhole construction operations (H₂S sour service grade)
4. Ultra-low-pressure formation wellbore renovation projects that cannot be constructed with conventional single-tube circulation wash tools, requiring flexible switchable washing, jetting and vacuum suction treatment modes under low-damage low-pressure operation
5. Long-term continuous multi-mode spiral jet washing and vacuum suction debris recovery safety protection for concentric coiled tubing bottom-hole assemblies in onshore and offshore oilfield low-pressure reservoir well intervention descaling projects
Standard Delivery Package
Complete multi-mode concentric coiled tubing wash tool integral pre-assembled unit including dedicated concentric matching connector, built-in spiral flow channel assembly, integrated self-cleaning filter screen and three-mode flow switching internal structure
Spare interchangeable filter screen kit for on-site self-cleaning filter maintenance and replacement
Full factory inspection test report including spiral jet flow impact test, integral tensile load test, self-cleaning filter anti-blocking performance test, vacuum suction recovery stability test and three-mode flow switching calibration test data
Product dimension drawing and official installation & operation instruction manual
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative working hours, whichever condition is reached first
Full factory inspection: Each finished multi-mode concentric coiled tubing wash tool passes integral tensile load test, spiral jet abrasion test, self-cleaning filter calibration test, vacuum suction stability test and three-mode flow switching test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides concentric CT tool string matching, concentric tubing spec selection and working condition grade consultation free of charge
Long-term spare parts supply: All interchangeable self-cleaning filter screen wear accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom concentric coiled tubing matching specifications, spiral flow channel structural parameters, concentric connector profiles, anti-corrosion coatings and special size multi-mode concentric wash tools based on customer technical drawings
FAQ
Q1: What is the core function of a Concentric Coiled Tubing Wash Tool (Multi-mode)?
The Concentric Coiled Tubing Wash Tool (Multi-mode) is a multi-functional concentric dual-pipe downhole wash sub designed for ultra-low-pressure reservoirs that standard circulation tools cannot treat. It integrates three switchable working modes: Washing Mode, Jetting Mode and Forceful Vacuum Mode; operators switch modes only by adjusting pump flow rate without pulling out the tool string. It uses a spiral flow channel to create high-speed swirling jet flow to scour tubing and casing inner walls; an integrated self-cleaning filter captures sediment, and vacuum negative pressure suction carries all solid debris back up the concentric tubing annulus to surface. The tool runs at low 3MPa working pressure to minimize formation damage, supporting flexible multi-process integrated washing, stirring and sediment recovery operations.
Q2: What three core structural advantages does this multi-mode concentric coiled tubing wash tool own?
1. Three independent switchable working modes all-in-one integrated design, including Washing, Jetting and Forceful Vacuum modes; mode conversion only requires adjusting pump flow rate without tripping tool string out of well, greatly improving construction flexibility and efficiency; 2. Built-in self-cleaning filter screen structure, realizing automatic anti-blocking backwashing during circulation to maintain stable vacuum suction debris recovery performance for long continuous construction; 3. Spiral flow channel high-efficiency rotary jet design, converting linear pumped fluid into powerful 360° swirling jet flow for dead-zone-free full-circumference well wall descaling, paired with vacuum negative pressure suction to realize one-step integrated washing and sediment backflow recovery, matched with ultra-low 3MPa working pressure to protect low-pressure sensitive formations.
Q3: What concentric coiled tubing matching specifications do these multi-mode concentric wash tools support?
Our standard production lineup fully covers two mainstream concentric CT combinations: 2" inner × 2" outer concentric tubing, and 1.25" inner × 2-3/8" outer concentric tubing. All models adopt dedicated concentric matching connectors compatible with global mainstream concentric continuous coiled tubing assemblies. The fixed standard construction parameters are 80~90L/min flow rate and maximum 3MPa working pressure.
Q4: What is the difference between STD standard grade and H₂S sour service grade?
STD standard grade is manufactured for conventional sweet oil wells without hydrogen sulfide corrosive fluid. H₂S sour service grade adopts sulfur-resistant alloy substrate and special anti-sulfur passivation coating to resist chemical corrosion in high-H₂S sour gas well environments.
Q5: What is the standard production lead time for bulk purchase orders?
All standard PN part numbers are kept in factory inventory, goods can be delivered within 7–15 working days. Customized multi-mode concentric coiled tubing wash tools with special concentric tubing matching specifications or custom spiral flow channel structural parameters require 20–35 working days production cycle, subject to total order quantity.
Get Custom Datasheet & Factory Quote
We are a professional OEM & ODM manufacturer focused on full series coiled tubing and concentric coiled tubing downhole service tools, covering concentric coiled tubing wash tools (multi-mode), concentric coiled tubing wash tools (single mode), slimline wash tools (double dart), slimline wash tools (double flapper), storm wash tools, low speed spinning jetting tools, multiple points rotary wash tools, fast rotary wash tools, conical wash tools, multi-nozzle wash tools, bull nose wash tools, big ID large bore motorhead assemblies, heavy duty integrated motorhead assemblies, big ID hydraulic disconnects, dog latch interchangeable piston hydraulic disconnects, heavy duty high torsion hydraulic retrievable disconnects, mechanical hydraulic dual-action disconnects, mechanical adjustable shear tension disconnects, dual activated dual-action circulation valves, ball activated shear pin circulation valves, burst disc pressure circulation valves, double dart dual-stage sealing check valves, double flapper dual-stage sealing check valves, big ID single flapper check valves, grapple dimple composite connectors, grub screw heavy-duty connectors, double dimple-on connectors, single dimple-on connectors, double roll-on connectors, single roll-on connectors, internal grapple connectors, external grapple connectors, logging heads and tubing hangers. Every finished product undergoes strict factory tensile load, spiral jet abrasion, self-cleaning filter anti-blocking, vacuum suction stability and three-mode flow switching calibration testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target concentric coiled tubing matching specifications, required spiral flow channel and filter configuration, working environment (STD standard or H₂S sour service) and all customized specification demands. Our dedicated oilfield downhole tool engineering team will send complete detailed technical datasheets and competitive factory wholesale quotations within 24 business hours.
