Product Overview
The Mechanical Hydraulic Disconnect is a dual-action two-piece emergency release tool for coiled tubing downhole service, composed of upper and lower subs connected by brass shear screws. It supports two independent release modes to solve stuck coiled tubing tool string problems under different construction conditions: Mode 1 (Pure Tension Release): Apply upward overpull tension exceeding the preset shear load of brass shear screws to cut off pins and separate upper/lower assemblies. Mode 2 (Hydraulic Assist Release): The lower sub is equipped with a built-in ball seat piston mechanism. Deliver a drop ball to sit on the piston, pressurize inside the coiled tubing to generate back hydraulic pressure, which assists in shearing the brass shear screws and greatly reduces the overpull tension required for separation.
This dual hydraulic mechanical disconnect integrates three core optimized structural designs: adjustable shear breaking tension, built-in standard GS internal fish neck, and full torque-through transmission structure, widely applicable to all types of coiled tubing downhole intervention treatments. Two complete service grades are provided to adapt to different reservoir environments: STD standard grade for conventional sweet oil wells without hydrogen sulfide corrosive media, and H₂S sour service grade manufactured with sulfur-resistant alloy for high-H₂S corrosive sour gas well working conditions.
The standardized product lineup covers outer diameter sizes ranging from 1-11/16" to 3-1/8", with matched inner diameter, make-up length and GS fish neck size specifications, equipped with standard AMMT and PAC bottom connection threads for universal matching with mainstream coiled tubing connectors and downhole service tools. Custom shear breaking tension load, custom GS 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 | Make-Up Length | Internal GS Fish Neck Size | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|---|
| L1201690120 | 1-11/16" | 0.75" | 18.4" | 2" | STD Standard | 1" AMMT |
| L1202125120 | 2-1/8" | 0.75" | 19.4" | 2" | STD Standard | 1-1/2" AMMT |
| L1202875120 | 2-7/8" | 1.37" | 20" | 3" | STD Standard | 2-3/8" PAC |
| L1203125120 | 3-1/8" | 1.37" | 22" | 3-1/2" | STD Standard | 2-3/8" PAC |
| L1201690320 | 1-11/16" | 0.75" | 18.4" | 2" | H₂S Sour Service | 1" AMMT |
| L1202125320 | 2-1/8" | 0.75" | 19.4" | 2" | H₂S Sour Service | 1-1/2" AMMT |
| L1202875320 | 2-7/8" | 1.37" | 20" | 3" | H₂S Sour Service | 2-3/8" PAC |
| L1203125320 | 3-1/8" | 1.37" | 22" | 3-1/2" | H₂S Sour Service | 2-3/8" PAC |
Note: Custom shear breaking tension load, custom GS fish neck size, outer diameter, inner bore flow size, anti-sulfur passivation coatings and non-standard length mechanical hydraulic disconnects are available via engineering consultation.
Core Features & Advantages
Dual-action dual release mechanism design: both mechanical tension pulling release and drop ball hydraulic pressure assist release are available, hydraulic assist effectively lowers the required overpull force, avoiding excessive pulling damage to coiled tubing strings
Adjustable shear breaking tension: adopt interchangeable brass shear screws of different specifications, freely customize the preset shear load according to construction safety requirements to realize controllable emergency separation
Built-in standard GS internal fish neck structure, after disconnect separation, the fallen lower sub assembly can be easily caught and recovered by matching fishing tools, minimizing downhole tool loss risk:
Full torque-through structural design, the upper and lower sub connecting structure can transmit torsion torque during coiled tubing rotating construction, compatible with milling, cutting and other torque-demanding downhole operations:
Dual service grade design: STD standard version for conventional sweet oilfield working environments, H₂S sulfur-resistant alloy version for highly corrosive high-H₂S sour gas well service
Complete outer diameter series compatible with 1-11/16", 2-1/8", 2-7/8" and 3-1/8" coiled tubing matching assemblies, covering all mainstream small and medium-size coiled tubing heavy-load downhole service demands:
Compact two-piece integrated split structure, simple external threaded connection design, convenient for rapid disassembly and assembly into the bottom coiled tubing tool string on site:
Precision CNC machined high-strength alloy steel main body, excellent tensile, torsion and pressure fatigue resistance to extend continuous long-term downhole safety service cycle:
Multi-dimensional customizable technical parameters, including shear breaking tension load, GS fish neck inner dimension, outer diameter, bottom thread specification and anti-sulfur surface passivation coatings, to meet unique customized coiled tubing emergency release demands:
Application Scenarios
1. All types of coiled tubing sand washing, well cleaning, gas lifting, milling, cutting and other heavy-duty downhole intervention treatments requiring emergency stuck tool string release
2. Conventional sweet crude oil well coiled tubing emergency separation safety protection service (STD standard service grade)
3. High-H₂S sour gas well corrosive environment coiled tubing stuck tool dual-mode emergency release operations (H₂S sour service grade)
4. Downhole tool string stuck, tubing jamming emergency recovery construction; hydraulic assist release reduces pulling force to protect coiled tubing integrity, matched with fishing tools for fallen assembly salvage
5. Long-term dual-mode emergency separation safety protection for coiled tubing strings in onshore and offshore oilfields
Standard Delivery Package
Complete mechanical hydraulic disconnect two-piece assembly (upper sub + lower sub) with built-in ball seat piston assembly and replaceable brass shear screws
Spare brass shear screw kit with multiple shear tension specifications for on-site shear load adjustment
Full factory inspection test report including shear breaking tension calibration, hydraulic assist pressure test, torque transmission and tensile resistance performance data
Product dimension drawing and official shear screw replacement, drop ball hydraulic assist operation & installation 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 mechanical hydraulic disconnect passes shear tension calibration, hydraulic assist pressure test, torque transmission and tensile resistance testing before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides tool string matching, shear screw tension selection, drop ball hydraulic assist operation guidance and parameter consultation free of charge
Long-term spare parts supply: All brass shear screw consumable accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom shear breaking tension loads, custom GS fish neck inner sizes, bottom thread profiles, anti-corrosion coatings and special size mechanical hydraulic disconnects based on customer technical drawings
FAQ
Q1: What is the core function of a Mechanical Hydraulic Disconnect??
The Mechanical Hydraulic Disconnect is a dual-action two-piece coiled tubing emergency release tool connected by brass shear screws. It supports two release modes: 1. Direct upward tension to shear pins and separate the tool; 2. Drop ball to form hydraulic back pressure, which assists shearing pins and lowers the required pull force, effectively recovering stuck downhole coiled tubing tool strings. Q2: What three core structural advantages does this mechanical hydraulic disconnect own? A2: 1. Adjustable shear breaking tension via interchangeable brass shear screws; 2. Built-in ball seat piston for hydraulic assist release to reduce overpull tension; 3. Standard internal GS fish neck for salvaging separated lower tools, plus torque through capability for rotary downhole operations. Q3: What range of outer diameter sizes do these mechanical hydraulic disconnects support? A3: Our standard production lineup fully covers 1-11/16", 2-1/8", 2-7/8" and 3-1/8" outer diameter specifications, compatible with global mainstream small and medium-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 mechanical hydraulic disconnects with special shear tension loads 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 mechanical hydraulic dual-action disconnect release subs, 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 shear tension calibration, hydraulic assist pressure test and torque transmission testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, required shear breaking tension load, GS fish neck custom size, 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.
