Product Overview
The Heavy Duty Hydraulic Disconnect is a heavy-load drop-ball actuated emergency release tool specially designed for high-strength coiled tubing downhole heavy-duty operations. Operators deploy a matching drop ball through the coiled tubing inner bore, the ball sits and builds internal tubing pressure to trigger the hydraulic separation mechanism, realizing safe detachment of the downhole coiled tubing tool string at the preset disconnect point.
A unique advantage of this heavy-duty hydraulic disconnect is that both the drop ball and the internal piston sleeve assembly will flow back to the ground surface together with the fluid after separation, no ball or piston parts left downhole. After the tool string is separated, a standard GS internal fish neck structure is retained at the upper sub, which can be matched with standard GS fishing tools to salvage and recover the lower disconnected downhole assembly. This product is specially suitable for high-load downhole construction operations such as coiled tubing cutting, drilling, milling and fishing.
Two complete service grades are supplied to match diverse reservoir environments: STD standard grade for conventional sweet oil wells without hydrogen sulfide corrosive media, and H₂S sour service grade constructed with sulfur-resistant alloy for high-H₂S corrosive sour gas well working conditions.
The standardized product lineup covers outer diameter sizes ranging from 1-3/4" to 3-1/8", with matched inner diameter, drop ball size, make-up length and GS fish neck size specifications, equipped with standard AMMT and PAC bottom connection threads for universal compatibility with mainstream coiled tubing connectors and heavy-duty downhole service tools. Custom drop ball size, custom fish neck inner size, wall thickness and anti-sulfur passivation coatings are available upon customer technical drawing submission.
Complete Technical Specification Table
| PN Part Number | Outer Diameter OD | Inner Diameter ID | Matching Drop Ball Size | Make-Up Length | Internal GS Fish Neck Size | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|---|---|
| L1211750120 | 1-3/4" | 0.47" | 5/8" | 23" | 2" | STD Standard | 1" AMMT |
| L1212125120 | 2-1/8" | 0.67" | 3/4" | 25.3" | 2" | STD Standard | 1-1/2" AMMT |
| L1212875120 | 2-7/8" | 0.9" | 1" | 30.5" | 3" | STD Standard | 2-3/8" PAC |
| L1213125120 | 3-1/8" | 1" | 1-1/8" | 30.5" | 3" | STD Standard | 2-3/8" PAC |
| L1211750320 | 1-3/4" | 0.47" | 5/8" | 23" | 2" | H₂S Sour Service | 1" AMMT |
| L1212125320 | 2-1/8" | 0.67" | 3/4" | 25.3" | 2" | H₂S Sour Service | 1-1/2" AMMT |
| L1212875320 | 2-7/8" | 0.9" | 1" | 30.5" | 3" | H₂S Sour Service | 2-3/8" PAC |
| L1213125320 | 3-1/8" | 1" | 1-1/8" | 30.5" | 3" | H₂S Sour Service | 2-3/8" PAC |
Note: Custom matching drop ball size, custom GS fish neck inner dimension, outer diameter, inner bore flow size, anti-sulfur passivation coatings and non-standard length heavy duty hydraulic disconnects are available via engineering consultation.
Core Features & Advantages
Heavy-duty high-strength design, ultra-high tensile load rating and outstanding anti-torsion performance, capable of bearing large tension and torsion torque generated during cutting, drilling, milling and other heavy-load rotary coiled tubing operations:
Full retrievable drop ball & piston sleeve assembly: after hydraulic separation, the drop ball and piston sleeve flow back to the ground with circulating fluid, no metal components remain in the downhole tubing string, avoiding inner bore blockage risks
Built-in standard GS internal fish neck structure, after tool separation, the upper sub reserves standard GS fishing profile, which can be quickly matched with conventional GS fishing tools to salvage the lost lower downhole tool assembly, greatly reducing downhole fishing construction difficulty:
Dual service grade design: STD standard version for conventional sweet oilfield working conditions, H₂S sulfur-resistant alloy version for highly corrosive high-H₂S sour gas well service
Complete outer diameter series compatible with 1-3/4", 2-1/8", 2-7/8" and 3-1/8" coiled tubing matching assemblies, covering all mainstream medium and large-size coiled tubing heavy-load downhole service demands:
Compact integrated hydraulic actuation structure, simple external threaded connection design, convenient for fast disassembly and assembly into the bottom heavy-duty coiled tubing tool string on site:
Precision CNC machined ultra-high strength alloy steel valve body, excellent tensile, torsion, erosion and pressure fatigue resistance to extend continuous long-term heavy-load downhole safety service cycle:
Multi-dimensional customizable technical parameters, including drop ball matching size, GS fish neck inner dimension, outer diameter, bottom thread specification and anti-sulfur surface passivation coatings, to satisfy unique proprietary heavy-load coiled tubing emergency release requirements:
Application Scenarios
1. Heavy-load coiled tubing cutting, drilling, milling, fishing and other high-tension & high-torsion downhole intervention treatments requiring emergency tool string release
2. Conventional sweet crude oil well heavy-duty coiled tubing emergency release safety protection service (STD standard service grade)
3. High-H₂S sour gas well corrosive environment heavy-load coiled tubing tool string hydraulic separation emergency salvage construction
4. Downhole stuck tool string emergency release for rotary heavy-duty operations, all internal moving components fully recyclable to surface without downhole debris
5. Long-term heavy-load tension & torsion safety protection for coiled tubing strings in onshore and offshore oilfields
Standard Delivery Package
Complete heavy duty hydraulic disconnect main body with built-in hydraulic piston sleeve assembly
Matching size drop ball spare kit for field actuation operation
Full factory inspection test report including tensile load test, torsion resistance test, hydraulic separation pressure calibration test data
Product dimension drawing and official drop ball actuation, 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 heavy duty hydraulic disconnect passes tensile load test, torsion resistance test and hydraulic separation pressure calibration before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides tool string matching, drop ball size selection, hydraulic separation pressure parameter consultation free of charge
Long-term spare parts supply: All matching drop ball consumable accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom drop ball size, custom GS fish neck inner dimension, bottom thread profiles, anti-corrosion coatings and special size heavy duty hydraulic disconnects based on customer technical drawings
FAQ
Q1: What is the core function of a Heavy Duty Hydraulic Disconnect??
The Heavy Duty Hydraulic Disconnect is a heavy-load drop-ball actuated emergency release tool for coiled tubing heavy operations. Deliver matched drop ball, build internal tubing pressure to trigger hydraulic separation to detach downhole tool string. The drop ball and piston sleeve flow back to surface, upper sub retains GS fish neck for salvaging lower stuck tool assembly. Q2: What three core structural advantages does this heavy duty hydraulic disconnect own? A2: 1. High tensile & high torsion heavy-duty alloy body, applicable to cutting, drilling, milling heavy rotary work; 2. Drop ball and piston sleeve fully retrievable to ground, no debris left downhole; 3. Built-in standard GS internal fish neck, compatible with standard GS fishing tools for salvage. Q3: What range of outer diameter sizes do these heavy duty hydraulic disconnects support? A3: Our standard production lineup fully covers 1-3/4", 2-1/8", 2-7/8" and 3-1/8" outer diameter specifications, compatible with global mainstream medium and large-size coiled tubing matching assemblies. Q4: What is the difference between STD standard grade and H₂S sour service grade? A4: 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? A5: All standard PN part numbers are kept in factory inventory, goods can be delivered within 7–15 working days. Customized heavy duty hydraulic disconnects with special drop ball sizes or custom fish neck dimensions 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 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, torsion resistance and hydraulic separation pressure calibration testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, required matching drop ball size, GS fish neck custom inner dimension, working environment (STD standard or H₂S sour service) and 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.
