Product Overview
The Flow Activated Releasable GS Fishing Tool is a differential pressure actuated releasable fishing retrieval tool specially developed for coiled tubing downhole workover operations of running in or retrieving downhole functional tools equipped with industry standard internal GS fish neck structure.
This GS fishing tool adopts a pure hydraulic flow differential pressure actuation release mechanism, completely eliminating the need for auxiliary shear pins or operation drop balls required by traditional releasable fishing jars. During downhole running-in or fishing recovery construction, when surface pump circulates working fluid through the internal precision throttling nozzles of the GS fishing tool, fluid throttling will generate 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 release the locked GS fish neck downhole tool assembly.
The tool’s core adjustable performance advantage lies in its tunable release flow rate: construction engineers can adjust the critical circulating flow rate required to trigger differential pressure release by modifying the flow passage size of the internal throttling nozzles, matching different wellbore pressure environments, working fluid viscosity and other construction parameter demands, realizing flexible on-site release load adjustment without replacing the entire fishing tool body.
The Flow Activated Releasable GS Fishing Tool is widely applicable to all coiled tubing downhole workover construction scenarios involving running-in or recovering downhole tools fitted with standard internal GS fish neck, including bridge plugs, packers, plug valves and other downhole flow control & isolation functional assemblies.
The standardized product lineup covers outer diameter sizes ranging from 1-3/4" to 3-1/8", with matched middle make-up length specifications, equipped with standard 1"AMMT, 1-1/2"AMMT and 2-3/8"PAC bottom connection threads for universal compatibility with mainstream coiled tubing connectors and other downhole fishing workover service tools. Custom outer diameter, internal nozzle flow passage size (release flow rate adjustment range) 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 (Middle Position) | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|
| L3051750120 | 1-3/4" | 0.35" | 12.7" | STD Standard | 1" AMMT |
| L3052125120 | 2-1/8" | 0.35" | 13.7" | STD Standard | 1-1/2" AMMT |
| L3052250120 | 2-1/4" | 0.39" | 14.7" | STD Standard | 1-1/2" AMMT |
| L3052500120 | 2-1/2" | 0.39" | 14.7" | STD Standard | 1-1/2" AMMT |
| L3052875120 | 2-7/8" | 0.74" | 17.3" | STD Standard | 2-3/8" PAC |
| L3053125120 | 3-1/8" | 1" | 17.3" | STD Standard | 2-3/8" PAC |
Note: Custom outer diameter, customized internal throttling nozzle flow passage size (adjustable release flow rate range) and structural parameter modification flow activated releasable GS fishing tools are available via engineering consultation. This tool requires matched downhole tools to be equipped with standard internal GS fish neck structure to realize locking and release functions.
Core Features & Advantages
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.
Adjustable Release Circulating Flow Rate Design: The critical flow volume required to generate release differential pressure can be flexibly tuned by modifying the internal throttling nozzle flow passage size, adapting to variable downhole conditions including different wellbore pressure gradients, completion fluid viscosities and construction load requirements, realizing on-site release sensitivity adjustment without whole-tool replacement.
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 parts, low wear and low failure rate, ensuring stable and reliable release action after reaching the set circulating flow threshold.
Dedicated Matching for Industry Standard Internal GS Fish Neck: The fishing slip internal clamping profile and radial expansion stroke are fully optimized to perfectly match the dimensional specification of industry standard GS fish neck structure, realizing reliable locking and stable release of all types of downhole functional assemblies equipped with standard GS fish neck.
Low Wellsite Operation Threshold, Simplified Construction Procedures: Operators only need to adjust surface pump circulating flow to reach the preset release flow rate to complete GS fish neck 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 1-3/4", 2-1/8", 2-1/4", 2-7/8" and 3-1/8" outer diameter specifications, fully compatible with global mainstream medium-size coiled tubing assemblies for all standard GS 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 and 2-3/8"PAC 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 GS 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 GS fish neck tool running-in and fishing retrieval service life for downhole workover operations.
Application Scenarios
1. Coiled tubing downhole standard GS fish neck downhole tool running-in and fishing recovery heavy-load intervention treatments, including bridge plug, packer, plug valve and other downhole flow control/isolation functional assembly deployment and salvage construction operations
2. Conventional sweet crude oilfield flow differential pressure actuated releasable GS fishing jar standard GS fish neck tool running and fishing workover service (STD standard service grade)
3. Downhole GS fish neck tool deployment & fishing heavy workover projects requiring shear-pin-free drop-ball-free release mechanism, adjustable circulating flow release threshold 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 GS fish neck downhole tool running-in and fishing recovery heavy workover intervention projects
Standard Delivery Package
Complete flow activated releasable GS fishing tool integral pre-assembled unit including internal differential pressure throttling nozzle assembly, mandrel linear downward transmission mechanism and standard GS 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 GS 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 circulating flow adjustment guidance for release threshold setting
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 GS fishing tool passes integral tensile load test, repeated differential pressure throttling actuation cycle fatigue test, mandrel linear downward stroke calibration test, standard GS 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 GS 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 GS 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 (adjustable release flow rate range), structural parameter modification, bottom thread profiles and special size flow activated releasable GS fishing tools based on customer technical drawings
FAQ
Q1: What is the core function of a Flow Activated Releasable GS Fishing Tool?
The Flow Activated Releasable GS Fishing Tool is a differential pressure actuated releasable fishing retrieval jar dedicated to coiled tubing workover, used for running in or recovering downhole tools fitted with standard internal GS fish neck structure. It adopts pure fluid throttling differential pressure release design, no shear pins or drop balls required: circulating fluid flows through internal precision nozzles to create pressure drop, differential force pushes internal mandrel downward to retract fishing slips and release the GS fish neck assembly. The release trigger circulating flow rate can be adjusted by changing internal nozzle flow passage sizes, and it is widely applied for deployment and salvage of bridge plugs, packers, plug valves and other GS fish neck equipped downhole functional tools.
Q2: What three core structural advantages does this flow activated releasable GS fishing tool own?
1. 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; 2. Adjustable release circulating flow rate threshold design, construction personnel can flexibly tune the minimum pump flow volume required to generate release differential pressure by replacing internal throttling nozzles with different flow passage sizes, adapting to variable downhole working conditions including different wellbore pressure gradients, completion fluid viscosities and fishing load demands, realizing release sensitivity adjustment without replacing the whole fishing tool body; 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 GS fish neck structural downhole tools.
Q3: What outer diameter sizes do these flow activated releasable GS fishing tools support?
Our standard production lineup fully covers outer diameters: 1-3/4", 2-1/8", 2-1/4", 2-1/2", 2-7/8" and 3-1/8". All models adopt universal 1"AMMT, 1-1/2"AMMT and 2-3/8"PAC 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 GS 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 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 GS 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 GS 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 circulating flow release threshold adjustment operation guidance.
