Product Overview
The Bi-Direction Mechanical Accelerator is a dedicated matched supporting impact booster tool specially developed to be used in tandem combination with the Bi-Direction Mechanical Jar for coiled tubing downhole junk fishing heavy workover intervention operations.
This bidirectional mechanical accelerator adopts industry mature multi-stack belleville disc spring energy storage mechanism. When construction crews lift the coiled tubing string upward or slack off tubing weight downward on surface, the accelerator’s internal energy storage assembly will be compressed or stretched, storing large elastic potential energy inside multiple groups of stacked belleville disc springs. When the matched bi-direction mechanical jar releases its latch and triggers upward or downward jarring impact action, all elastic potential energy stored in the disc spring stacks is instantly converted into high-speed kinetic energy, the accelerator and mechanical jar act synchronously at the same time, jointly output amplified high-magnitude bidirectional jarring impact force, effectively improving the success rate of releasing stuck tubing and recovering downhole metal junk.
The Bi-Direction Mechanical Accelerator features two core structural advantages for field operation: full flow through bore design and torque through capability. The full large-diameter full inner through bore provides unobstructed channel for operation drop balls, allowing drop balls to freely pass through the mechanical accelerator body to actuate other downhole functional tools without flow blockage risk. The built-in high-strength torque through transmission structure enables the accelerator to stably bear and transmit large rotary torque loads generated by downhole milling motors during combined milling-fishing construction, avoiding mechanical jamming or structural deformation under high-torque rotary working conditions.
The Bi-Direction Mechanical Accelerator can only be used in matched tandem assembly with the Bi-Direction Mechanical Jar, and the combined tool string is widely applicable to all types of coiled tubing downhole junk fishing heavy workover construction scenarios, including stuck pipe release, dropped metal tool recovery and junk fishing intervention operations.
The standardized product lineup covers outer diameter sizes ranging from 1-3/4" to 3-1/8", with matched closed make-up length and fixed stroke 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 bi-direction mechanical jars. Custom outer diameter, stroke length and belleville disc spring stack configuration 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) | Stroke | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|---|
| L3031750120 | 1-3/4" | 0.39" | 50.2" | 6" | STD Standard | 1" AMMT |
| L3032125120 | 2-1/8" | 0.55" | 55.2" | 11" | STD Standard | 1-1/2" AMMT |
| L3032875120 | 2-7/8" | 0.75" | 69.2" | 13" | STD Standard | 2-3/8" PAC |
| L3033125120 | 3-1/8" | 1" | 69.2" | 13" | STD Standard | 2-3/8" PAC |
Note: Custom outer diameter, customized stroke length and belleville disc spring stack configuration parameter modification bi-direction mechanical accelerators are available via engineering consultation. This product must be used in tandem matched assembly with Bi-Direction Mechanical Jar to realize impact amplification function.
Core Features & Advantages
Dedicated Matched Tandem Supporting Design for Bi-Direction Mechanical Jar: The overall structural size, stroke and multi-stack belleville disc spring energy storage load are fully optimized to match the performance parameters of bi-direction mechanical jar; only when used in series with the matched bidirectional mechanical jar can the accelerator realize synchronous energy release and maximum impact amplification effect, forming a complete integrated bidirectional mechanical jarring fishing workover string solution.
Multi-Stack Belleville Disc Spring Bidirectional Energy Storage Mechanism: The internal energy storage assembly consists of multiple groups of stacked belleville disc springs, which can be compressed or stretched to store elastic potential energy in both upward tubing lifting stroke and downward tubing slacking stroke, realizing bidirectional energy storage for both upward jarring and downward jarring actions; when the mechanical jar releases its latch and triggers jarring movement, all elastic potential energy stored in disc spring stacks is instantly converted into high-speed kinetic energy to superpose impact force, significantly boosting the magnitude of upward and downward jarring impact output.
Full Flow Through Bore Structural Design: The tool body reserves wide unobstructed full inner through passage, the large inner diameter can allow various specification operation drop balls to smoothly pass through the mechanical accelerator without flow blockage, compatible with drop ball actuation of other downhole functional tools assembled in the same fishing workover string.
Torque Through Capability Structural Design: Built-in high-strength torque transmission matching structure, the accelerator can stably bear and transmit large rotary torque loads generated by downhole milling motors during combined milling-fishing construction, effectively avoiding mechanical jamming, sliding or structural deformation failure under high-torque rotary working conditions.
Convenient Disassembly & Routine Maintenance Design: The split mechanical assembly structure supports quick disassembly of the accelerator body on wellsite for internal belleville disc spring stack inspection, wear part replacement and disc spring stack quantity adjustment operations, greatly reducing the time cost of routine maintenance and post-operation inspection.
Wide Multi-Scenario Junk Fishing Application: The matched accelerator and bi-direction mechanical jar combination string is adaptable to full series coiled tubing downhole junk fishing heavy intervention construction including stuck pipe release, dropped metal downhole tool recovery and junk fishing workover operations.
Full Outer Diameter Size Compatibility: Standard product series covers 1-3/4", 2-1/8", 2-7/8" and 3-1/8" outer diameter specifications, fully compatible with global mainstream medium-size coiled tubing assemblies for all bidirectional mechanical jarring junk fishing 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 matched bi-direction mechanical jars without extra conversion subs.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, multi-stack belleville disc spring energy storage assembly and impact energy transmission matching components, featuring outstanding repeated compression energy storage fatigue resistance, high-torque load bearing capacity and structural stability, extending long-term continuous bidirectional mechanical jarring impact amplification service life for downhole junk fishing operations.
Application Scenarios
1. Coiled tubing downhole junk fishing heavy-load intervention bidirectional jarring impact amplification treatments including stuck tubing release, dropped metal downhole tool recovery and junk fishing construction operations
2. Conventional sweet crude oilfield matched bi-direction mechanical jar multi-stack belleville disc spring energy storage impact booster junk fishing heavy workover service (STD standard service grade)
3. Downhole junk fishing heavy workover projects requiring bidirectional upward/downward jarring impact force amplification, full flow through bore for drop ball passage and torque through capability for milling-fishing combined construction
4. Long-term continuous repeated disc spring compression energy storage safety protection for coiled tubing bottom-hole assemblies in onshore and offshore oilfield junk fishing heavy workover intervention projects
Standard Delivery Package
Complete bi-direction mechanical accelerator integral pre-assembled unit including multi-stack belleville disc spring energy storage assembly, bidirectional compression energy storage structure and standard bottom connection thread
Spare interchangeable belleville disc spring stack kit with multiple spring stiffness specifications for on-site upward/downward jarring force amplification configuration adjustment
Full factory inspection test report including repeated disc spring compression energy storage fatigue resistance test, integral tensile load test, stroke travel calibration test, full through bore drop ball passing smoothness test and synchronous energy release impact amplification performance test data
Product dimension drawing and official installation & operation instruction manual, with detailed matched tandem assembly connection guidance for combination with Bi-Direction Mechanical Jar
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative disc spring compression energy storage cycles, whichever condition is reached first
Full factory inspection: Each finished bi-direction mechanical accelerator passes integral tensile load test, repeated disc spring compression cycle fatigue test, stroke travel calibration test, full through bore drop ball passing smoothness test and synchronous energy release impact amplification performance test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides coiled tubing junk fishing heavy workover tool string matching, outer diameter & stroke length selection and bi-direction mechanical jar tandem assembly matching consultation free of charge
Long-term spare parts supply: All interchangeable belleville disc spring stack wear accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom outer diameters, customized stroke lengths, belleville disc spring stack configuration parameter modification, bottom thread profiles and special size bi-direction mechanical accelerators based on customer technical drawings
FAQ
Q1: What is the core function of a Bi-Direction Mechanical Accelerator?
The Bi-Direction Mechanical Accelerator is a dedicated matched impact booster tool that must be used in tandem combination with the Bi-Direction Mechanical Jar for coiled tubing junk fishing workover. It adopts multi-stack belleville disc spring bidirectional energy storage mechanism: multiple groups of stacked disc springs store elastic potential energy when compressed or stretched during upward tubing lifting stroke and downward tubing slacking stroke; when the matched bi-direction mechanical jar releases its latch and triggers upward or downward jarring action, all stored elastic potential energy converts into high-speed kinetic energy instantly to greatly amplify bidirectional jarring impact force. It features full flow through bore design for unobstructed drop ball passage and torque through capability to transmit rotary milling torque, and is exclusively used in combination with bi-direction mechanical jar for all types of downhole junk fishing recovery operations.
Q2: What three core structural advantages does this bi-direction mechanical accelerator own?
1. Dedicated matched tandem supporting design optimized for bi-direction mechanical jar, the stroke, multi-stack belleville disc spring load and overall dimension are fully matched with the bidirectional mechanical jar’s performance parameters, only combined in series with the matched mechanical jar can it realize synchronous energy release and maximum impact amplification effect, forming a complete integrated bidirectional mechanical jarring fishing workover string solution; 2. Multi-stack belleville disc spring bidirectional energy storage mechanism paired with full flow through bore design: multiple groups of stacked disc springs store elastic potential energy in both upward pull stroke and downward slack stroke, realizing dual energy storage for upward jarring and downward jarring, instantly releasing all stored elastic energy to convert into high kinetic energy when jarring action triggers to boost impact magnitude; the wide unobstructed full inner through passage allows all common specification operation drop balls to smoothly pass through the accelerator without flow blockage, compatible with drop ball actuation of other functional tools in the same workover string; 3. Torque through capability structural design with convenient disassembly maintenance: built-in high-strength torque transmission matching structure enables the accelerator to stably bear and transmit large rotary torque loads generated by downhole milling motors during combined milling-fishing construction, avoiding mechanical jamming or structural deformation under high-torque rotary working conditions; the split mechanical assembly structure supports quick on-site disassembly for disc spring stack inspection, wear part replacement and impact amplification force adjustment.
Q3: What outer diameter sizes do these bi-direction mechanical accelerators support?
Our standard production lineup fully covers outer diameters: 1-3/4", 2-1/8", 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 matched bi-direction mechanical jars.
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 bi-direction mechanical accelerators with special outer diameters or customized stroke lengths & belleville disc spring stack configuration parameters 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 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 disc spring compression fatigue, stroke travel calibration, full through bore drop ball passing smoothness and synchronous energy release impact amplification performance testing, with complete material inspection certification attached to each shipment. Please share your detailed technical requirements, including target outer diameter size, required stroke length, matched bi-direction mechanical jar model, 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 tandem assembly connection matching guidance for combination with Bi-Direction Mechanical Jar.
