Product Overview
The Flow Activated Releasable JDC Running & Pulling Fishing Tool is a differential pressure actuated releasable running and pulling fishing retrieval jar specially developed for coiled tubing downhole workover operations of deploying or salvaging downhole functional assemblies equipped with industry standard external JDC fish neck structure.
This JDC fishing tool features an innovative automatic fish neck engagement mechanism: during running-in or fishing salvage construction, when the front end of the JDC tool contacts the top shoulder of the external JDC fish neck on the target downhole assembly, operators only need to apply a slight downward pushing load on the coiled tubing string, and the internal slip assembly will automatically expand outward to lock and engage the external JDC fish neck without extra rotation, positioning or complex manipulation steps.
For release operation after finishing running-in or fishing recovery tasks, the tool adopts a pure fluid throttling differential pressure actuation release design, completely eliminating the need for auxiliary shear pins or operation drop balls required by traditional releasable fishing jars. When surface pump circulates working fluid through the internal precision throttling nozzles of the JDC fishing tool, fluid throttling generates stable differential pressure drop, the pressure difference force will push the tool’s internal mandrel assembly to move downward, driving the fishing slip sets to retract inward to fully release the locked external JDC fish neck downhole tool assembly.
The Flow Activated Releasable JDC Running & Pulling Fishing Tool is widely applicable to all coiled tubing downhole workover construction scenarios involving deploying or recovering downhole tools fitted with standard external JDC fish neck, including bridge plugs, packers, flow control valves and other downhole isolation & flow regulation functional assemblies.
The standardized product lineup covers outer diameter sizes ranging from 1-11/16" to 3-5/8", with matched closed make-up length specifications, equipped with standard 1"AMMT, 1-1/2"AMMT, 2-3/8"PAC and NC26 bottom connection threads for universal compatibility with mainstream coiled tubing connectors and other downhole fishing workover service tools. Custom outer diameter, internal throttling nozzle flow passage size and structural parameter customization are available upon customer technical drawing submission.
Complete Technical Specification Table
| PN Part Number | Outer Diameter OD | Inner Diameter ID | Make-Up Length (Closed) | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|
| L3061690120 | 1-11/16" | 0.2" | 16" | STD Standard | 1" AMMT |
| L3062125120 | 2-1/8" | 0.3" | 17" | STD Standard | 1-1/2" AMMT |
| L3062500120 | 2-1/2" | 0.4" | 18" | STD Standard | 1-1/2" AMMT |
| L3062875120 | 2-7/8" | 0.5" | 18" | STD Standard | 2-3/8" PAC |
| L3063125120 | 3-1/8" | 0.6" | 18" | STD Standard | 2-3/8" REG |
| L3063625120 | 3-5/8" | 0.7" | 18" | STD Standard | NC26 |
Note: Custom outer diameter, customized internal throttling nozzle flow passage size and structural parameter modification flow activated releasable JDC running/pulling fishing tools are available via engineering consultation. This tool requires matched downhole tools to be equipped with standard external JDC fish neck structure to realize locking and release functions.
Core Features & Advantages
Automatic External JDC Fish Neck Engagement Mechanism: The internal slip expansion structure is optimized for standard external JDC fish neck shoulder geometry; when the tool contacts the top of the fish neck, only light downward push load is required to realize automatic outward expansion and locking engagement of the slips, eliminating complex auxiliary positioning or rotation operations and simplifying wellsite running-in/fishing operation steps.
Pure Flow Differential Pressure Actuated Release Mechanism, Zero Shear Pin / Drop Ball Dependency: The tool relies entirely on circulating fluid throttling pressure drop to trigger release action, no shear pins that risk premature shear failure or operation drop balls that risk wellbore jamming are required, eliminating two major common failure risks of traditional releasable fishing jars and greatly improving construction operation reliability.
Simple Stable Mandrel Downward Retraction Release Structure: Internal mandrel assembly driven by differential pressure drop moves linearly downward to synchronously retract multiple groups of fishing slip sets inward, the mechanical transmission path is short and direct with few moving friction components, low wear and low failure rate, ensuring stable and reliable release action after reaching the set circulating flow threshold.
Dedicated Matching for Industry Standard External JDC Fish Neck: The fishing slip internal clamping profile and radial expansion stroke are fully optimized to perfectly match the dimensional specification of industry standard external JDC fish neck structure, realizing reliable locking and stable release of all types of downhole functional assemblies equipped with standard external JDC fish neck.
Low Wellsite Operation Threshold, Simplified Construction Procedures: Two core operation processes are highly simplified: 1) Fish neck engagement: slight downward push to auto-lock slips; 2) Fish neck release: adjust surface pump circulating flow to reach preset release flow rate to complete release action. No complex auxiliary operation steps such as drop ball delivery or shear pin impact jarring are needed, shortening wellsite operation time and reducing human error risks.
Full Outer Diameter Size Compatibility: Standard product series covers 1-11/16", 2-1/8", 2-1/2", 2-7/8", 3-1/8" and 3-5/8" outer diameter specifications, fully compatible with global mainstream medium-size coiled tubing assemblies for all standard external JDC fish neck downhole tool running-in and fishing recovery intervention demands.
Multi-Type Standard Thread Compatibility: All product models are equipped with universal 1"AMMT, 1-1/2"AMMT, 2-3/8"PAC and NC26 bottom connection threads, realizing seamless assembly with global mainstream coiled tubing bottom-hole assemblies and other supporting fishing workover tools without extra conversion subs.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, internal differential pressure throttling nozzle assembly, mandrel linear transmission matching components and external JDC fish neck clamping fishing slip sets, featuring outstanding circulating fluid erosion resistance, repeated differential pressure actuation cycle fatigue resistance and structural stability, extending long-term continuous external JDC fish neck tool running-in and fishing retrieval service life for downhole workover operations.
Application Scenarios
1. Coiled tubing downhole standard external JDC fish neck downhole tool running-in and fishing recovery heavy-load intervention treatments, including bridge plug, packer, flow control valve and other downhole flow control/isolation functional assembly deployment and salvage construction operations
2. Conventional sweet crude oilfield flow differential pressure actuated releasable JDC running/pulling fishing jar standard external JDC fish neck tool running and fishing workover service (STD standard service grade)
3. Downhole external JDC fish neck tool deployment & fishing heavy workover projects requiring auto fish neck engagement mechanism, shear-pin-free drop-ball-free release mechanism and stable mandrel linear retraction release structure
4. Long-term continuous repeated differential pressure throttling actuation safety protection for coiled tubing bottom-hole assemblies in onshore and offshore oilfield standard external JDC fish neck downhole tool running-in and fishing recovery heavy workover intervention projects
Standard Delivery Package
Complete flow activated releasable JDC running/pulling fishing tool integral pre-assembled unit including internal differential pressure throttling nozzle assembly, mandrel linear downward transmission mechanism and standard external JDC fish neck clamping fishing slip sets
Spare interchangeable internal throttling nozzle kit with multiple flow passage size specifications for on-site release circulating flow rate threshold adjustment configuration
Full factory inspection test report including repeated differential pressure throttling actuation cycle fatigue resistance test, integral tensile load test, mandrel linear downward stroke calibration test, standard external JDC fish neck clamping locking stability test and release action reliability performance test data
Product dimension drawing and official installation & operation instruction manual, with detailed on-site auto fish neck engagement and circulating flow release threshold adjustment guidance
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative differential pressure throttling actuation cycles, whichever condition is reached first
Full factory inspection: Each finished flow activated releasable JDC running/pulling fishing tool passes integral tensile load test, repeated differential pressure throttling actuation cycle fatigue test, mandrel linear downward stroke calibration test, standard external JDC fish neck clamping locking stability test and release action reliability performance test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides coiled tubing standard external JDC fish neck tool running-in & fishing heavy workover tool string matching, outer diameter & internal throttling nozzle flow size selection and release flow rate threshold adjustment consultation free of charge
Long-term spare parts supply: All interchangeable internal throttling nozzle wear accessories and external JDC fish neck clamping fishing slip sets are stocked with competitive factory bulk pricing
Custom development service: Support custom outer diameters, customized internal throttling nozzle flow passage sizes, structural parameter modification, bottom thread profiles and special size flow activated releasable JDC running/pulling fishing tools based on customer technical drawings
FAQ
Q1: What is the core function of a Flow Activated Releasable JDC Running & Pulling Fishing Tool?
The Flow Activated Releasable JDC Running & Pulling Fishing Tool is a differential pressure actuated releasable running/pulling fishing jar dedicated to coiled tubing workover, used for deploying or recovering downhole tools fitted with standard external JDC fish neck structure. It features auto fish neck engagement: slight downward push against the fish neck top triggers automatic slip locking. For release, circulating fluid flows through internal precision nozzles to create pressure drop, differential force pushes internal mandrel downward to retract slips and release the JDC fish neck assembly. The tool eliminates shear pins and drop balls entirely, and it is widely applied for deployment and salvage of bridge plugs, packers, flow control valves and other external JDC fish neck equipped downhole functional tools.
Q2: What three core structural advantages does this flow activated releasable JDC running/pulling fishing tool own?
1. Automatic external JDC fish neck engagement mechanism, optimized slip expansion profile matching standard external JDC fish neck shoulder geometry; only light downward push load is required to realize automatic outward expansion and locking engagement of the slips, eliminating complex auxiliary positioning or rotation operations and simplifying wellsite running-in/fishing operation steps; 2. Pure flow differential pressure actuated release mechanism without shear pins or drop balls, eliminating two major common failure risks of traditional releasable fishing jars: premature shear pin rupture and drop ball wellbore jamming, greatly improving on-site construction operation reliability and reducing unexpected downhole accident risks; 3. Simple stable mandrel linear downward retraction release structure, short direct mechanical transmission path with few moving friction components, low wear and low failure rate, ensuring synchronous inward retraction of multiple groups of fishing slip sets and stable reliable release action after circulating flow reaches the preset threshold, matched with optimized clamping slip profile for perfect locking and release of industry standard external JDC fish neck structural downhole tools.
Q3: What outer diameter sizes do these flow activated releasable JDC running/pulling fishing tools support?
Our standard production lineup fully covers outer diameters: 1-11/16", 2-1/8", 2-1/2", 2-7/8", 3-1/8" and 3-5/8". All models adopt universal 1"AMMT, 1-1/2"AMMT, 2-3/8"PAC and NC26 bottom connection threads compatible with global mainstream coiled tubing connector assemblies and other supporting downhole fishing workover tools.
Q4: 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 flow activated releasable JDC running/pulling fishing tools with special outer diameters or customized internal throttling nozzle flow passage sizes (adjustable release flow rate range) require 20–35 working days production cycle, subject to total order quantity and customization scope.
Get Custom Datasheet & Factory Quote
We are a professional OEM & ODM manufacturer focused on full series coiled tubing heavy workover and washing downhole service tools, covering flow activated releasable JDC running/pulling fishing tools, flow activated releasable GS fishing tools, bi-direction mechanical accelerators, bi-direction hydraulic accelerators, bi-direction hydraulic jars, up-stroke hydraulic jars, bi-direction mechanical jars, up-stroke mechanical jars, thru tubing cutters, high expansion four-blade hydraulic anchors, annular grapple hydraulic anchors, heavy duty motorhead assemblies, 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, repeated differential pressure throttling actuation cycle fatigue, mandrel linear downward stroke calibration, standard external JDC fish neck clamping locking stability and release action reliability performance testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, required internal throttling nozzle flow passage size (release circulating flow rate threshold adjustment range), matched external JDC fish neck dimension specification, working environment 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, and provide professional on-site auto fish neck engagement and circulating flow release threshold adjustment operation guidance.
