Product Overview
The Slimline Wash Tool (Double Dart) is a compact all-in-one integrated downhole washing assembly developed for coiled tubing well intervention operations, integrating three core functional components into a single unit: roll-on quick connection fitting, double dart check valve and conical jetting wash sub. The optimized integrated structural design drastically shortens the overall make-up length compared to split conventional wash tool combinations, realizing convenient, fast and high-efficiency downhole wellbore cleaning construction.
The roll-on connector adopts a streamlined quick roll-on matching structure, enabling rapid make-up and break-out connection with continuous coiled tubing without complex auxiliary conversion subs, greatly shortening wellsite tool string assembly time. The built-in double dart check valve assembly is equipped with two independent removable dart cartridges, forming stable bidirectional one-way sealing barriers to prevent reverse fluid backflow downhole, effectively protecting surface pump equipment and avoiding well fluid backflow risks. The front-end jetting wash sub is fully replaceable; operators can quickly swap jetting subs with different nozzle layouts according to specific well cleaning operation types to realize customized wellbore descaling and sand flushing treatment.
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 outer diameter sizes ranging from 1-1/2" to 2-7/8", with matched ultra-short overall make-up length specifications, equipped with universal roll-on type connection fittings for seamless matching with mainstream continuous coiled tubing assemblies and wellbore cleaning downhole service tools. Custom outer diameter, double dart sealing structure parameters and anti-sulfur passivation coatings are available upon customer technical drawing submission.
Complete Technical Specification Table
| PN Part Number | Outer Diameter OD | Make-Up Length | Working Condition Grade | Bottom Connection Type |
|---|---|---|---|---|
| L2151500120 | 1-1/2" | 14.3" | STD Standard | Roll On Connector |
| L2151750120 | 1-3/4" | 14.3" | STD Standard | Roll On Connector |
| L2152000120 | 2" | 16.1" | STD Standard | Roll On Connector |
| L2152375120 | 2-3/8" | 16.1" | STD Standard | Roll On Connector |
| L2152875120 | 2-7/8" | 23" | STD Standard | Roll On Connector |
| L2151500320 | 1-1/2" | 14.3" | H₂S Sour Service | Roll On Connector |
| L2151750320 | 1-3/4" | 14.3" | H₂S Sour Service | Roll On Connector |
| L2152000320 | 2" | 16.1" | H₂S Sour Service | Roll On Connector |
| L2152375320 | 2-3/8" | 16.1" | H₂S Sour Service | Roll On Connector |
| L2152875320 | 2-7/8" | 23" | H₂S Sour Service | Roll On Connector |
Note: Custom outer diameter, double dart sealing structural parameters, anti-sulfur passivation coatings and non-standard length slimline double dart wash tools are available via engineering consultation.
Core Features & Advantages
All-In-One Compact Integrated Structural Design: Integrates roll-on quick connector, dual dart check valve and jetting wash sub into one single assembly, overall length far shorter than separate conventional component combinations, simplifying coiled tubing tool string layout and reducing total string length.
Roll-On Quick Make-Up Connection Mechanism: Streamlined roll-on matching connector realizes fast assembly and disassembly with continuous coiled tubing, eliminating tedious conversion fitting matching procedures and improving wellsite tool string deployment efficiency.
Independent Dual Dart Check Valve Configuration: Two separate removable dart cartridges form dual-layer one-way sealing barriers, providing reliable anti-backflow protection against downhole fluid reverse flow, preventing well fluid from flowing back to damage surface pump and injection equipment.
Fully Interchangeable Replaceable Jetting Sub: The front-end wash jetting sub can be quickly detached and replaced without removing the entire tool assembly; multiple jetting sub specifications with different nozzle layouts are optional to match diverse sand washing, descaling and well cleanup construction requirements.
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.
Full Outer Diameter Size Compatibility: Standard product series covers 1-1/2", 1-3/4", 2", 2-3/8" and 2-7/8" outer diameter specifications, fully compatible with global mainstream medium-size continuous coiled tubing roll-on connection assemblies for all well descaling and sand flushing intervention demands.
Compact Short Make-Up Length Design: Optimized integrated compact structural design shortens overall tool length, reducing the total length of coiled tubing tool strings and minimizing downhole tubing drag resistance during tripping operations.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, roll-on connector and double dart valve components, featuring outstanding high-pressure fluid erosion resistance, sealing stability and structural durability, extending long-term continuous downhole washing service life.
Application Scenarios
1. Coiled tubing wellbore sand washing, tubing & casing inner wall descaling, paraffin cutting low-tension downhole intervention treatments requiring compact integrated tool string layout
2. Conventional sweet crude oil well fast-assembly coiled tubing wellbore cleaning and sediment flushing service (STD standard service grade)
3. High-H₂S sour gas well corrosive environment compact integrated double dart anti-backflow coiled tubing well cleaning downhole construction operations (H₂S sour service grade)
4. Coiled tubing intervention projects requiring fast wellsite tool deployment and reliable anti-fluid-backflow protection during wellbore washing operations
5. Long-term continuous downhole washing and fluid backflow prevention safety protection for coiled tubing bottom-hole assemblies in onshore and offshore oilfield well intervention descaling projects
Standard Delivery Package
Complete slimline double dart wash tool integral pre-assembled unit including roll-on quick connector, dual independent dart check valve cartridges and base body
Spare interchangeable jetting sub kit with multiple nozzle layout specifications for on-site washing function adjustment and replacement
Full factory inspection test report including high-pressure fluid erosion test, integral tensile load test and double dart one-way sealing performance 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 slimline double dart wash tool passes integral tensile load test, high-pressure fluid erosion test and double dart sealing calibration test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides tool string matching, outer diameter & jetting sub layout selection and working condition grade consultation free of charge
Long-term spare parts supply: All interchangeable jetting subs and dart cartridge wear accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom outer diameters, double dart sealing structural parameters, roll-on connection specifications, anti-corrosion coatings and special size slimline double dart wash tools based on customer technical drawings
FAQ
Q1: What is the core function of a Slimline Wash Tool (Double Dart)?
The Slimline Wash Tool (Double Dart) is a compact all-in-one coiled tubing downhole wash assembly integrating roll-on quick connector, dual dart anti-backflow check valve and replaceable jetting sub. Its ultra-short integrated design simplifies tool string layout; dual darts block reverse fluid backflow to protect surface equipment, and interchangeable jetting subs support customizable wellbore sand washing and descaling operations for vertical and horizontal wells.
Q2: What three core structural advantages does this slimline double dart wash tool own?
1. Compact all-in-one integrated design combining connector, double dart valve and wash jetting sub, overall length much shorter than split separate component combinations to streamline coiled tubing tool string layout; 2. Roll-on quick connection structure, enabling fast assembly and disassembly with continuous coiled tubing to greatly boost wellsite tool deployment efficiency; 3. Independent dual dart cartridge anti-backflow valve design, dual-layer one-way sealing barriers provide reliable protection against downhole fluid reverse flow, and the front jetting sub is fully interchangeable for flexible adjustment of washing construction modes.
Q3: What outer diameter sizes do these slimline double dart wash tools support?
Our standard production lineup fully covers outer diameters: 1-1/2", 1-3/4", 2", 2-3/8" and 2-7/8". All models adopt universal roll-on type connection fittings compatible with global mainstream continuous coiled tubing assemblies.
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 slimline double dart wash tools with special outer diameters or custom double dart 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 downhole service tools, covering 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, high-pressure fluid erosion and double dart sealing calibration testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, required jetting sub layout 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.
