Product Overview
The Bi-Direction Hydraulic Jar is a hydraulic delay type dual-action bidirectional impact fishing jar, specially developed for coiled tubing heavy workover operations such as stuck pipe release, junk fishing, casing cutting, hard formation milling and sidetracking drilling.
This hydraulic bi-direction jar adopts mature industry standard hydraulic delay buffer mechanism. Operators can generate controllable upward jarring impact and downward jarring impact only by lifting upward or slacking off the coiled tubing string on surface, and no pre-well setting, calibration or mechanical adjustment work is required before running the tool string into wellbore. The magnitude of jarring impact force is positively proportional to the upward lifting load or downward slacking weight applied on surface, construction personnel can flexibly adjust impact strength according to downhole stuck severity and formation conditions.
The tool is designed with a large-diameter full internal through bore, the wide inner flow passage provides unobstructed channel for operation drop balls, allowing drop balls to smoothly pass through the hydraulic jar body to act on other downhole functional tools without flow blockage risk. When matched and combined with the supporting Bi-Direction Hydraulic Accelerator, the accelerator can effectively store and release elastic impact energy, significantly amplify the upward and downward jarring impact force output of the hydraulic jar, greatly improve the success rate of releasing stuck tubing, fishing junk and other downhole stuck treatment operations.
The Bi-Direction Hydraulic Jar is widely applicable to multiple coiled tubing heavy workover construction scenarios: casing/tubing cutting, hard rock plug milling, sidetracking directional drilling, stuck pipe release, downhole junk fishing and other 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, 2-3/8"PAC and 2-3/8"REG bottom connection threads for universal compatibility with mainstream coiled tubing connectors, hydraulic accelerators, fishing necks and other downhole workover service tools. Custom outer diameter, stroke length and hydraulic delay 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) | Stroke | Working Condition Grade | Bottom Connection Thread |
|---|---|---|---|---|---|---|
| L3011750120 | 1-3/4" | 0.55" | 58" | 11" | STD Standard | 1" AMMT |
| L3012125120 | 2-1/8" | 0.75" | 60" | 12" | STD Standard | 1-1/2" AMMT |
| L3012875120 | 2-7/8" | 1" | 68" | 12" | STD Standard | 2-3/8" PAC |
| L3013125120 | 3-1/8" | 1.26" | 68" | 12" | STD Standard | 2-3/8" REG |
Note: Custom outer diameter, customized stroke length and hydraulic delay structural parameter modification bi-direction hydraulic jars are available via engineering consultation.
Core Features & Advantages
Mature Hydraulic Delay Dual-Action Bi-Directional Jarring Mechanism: Industry proven hydraulic delay buffer design, realize independent controllable upward jarring impact and downward jarring impact through simple surface lifting or slacking tubing operation, stable delay buffer performance to avoid sudden out-of-control impact force.
Zero Pre-Run Adjustment Operation Design: No mechanical setting, calibration or parameter adjustment work needs to be completed before running the tool string into wellbore, simplify wellsite pre-job preparation procedures and reduce on-site operation time cost.
Impact Force Adjustable by Surface Load Control: The output jarring impact energy is positively correlated with the upward lifting load or downward slacking weight applied on surface, construction crews can flexibly increase or reduce impact strength according to actual downhole stuck severity and formation bearing capacity.
Large Full Internal Through Bore Structure: The tool body reserves wide unobstructed inner through passage, the large inner diameter can allow various specification operation drop balls to smoothly pass through the hydraulic jar without flow blockage, compatible with drop ball actuation of other downhole tools in the same string.
Perfect Matching Bi-Direction Hydraulic Accelerator Supporting Solution: Can be assembled in tandem with dedicated bi-direction hydraulic accelerator as a complete jarring workover string; the accelerator stores elastic energy during lifting/slacking stroke and releases instantly during jarring action, greatly amplify upward and downward impact strength to significantly improve stuck pipe release and junk fishing success rate.
Wide Multi-Scenario Heavy Workover Application: Adaptable to full series coiled tubing heavy intervention construction including tubing/casing cutting, hard formation plug milling, sidetracking directional drilling, stuck pipe release, downhole metal junk fishing and other 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 jarring fishing and milling 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 2-3/8"REG bottom connection threads, realizing seamless assembly with global mainstream coiled tubing bottom-hole assemblies, hydraulic accelerators and fishing tools without extra conversion subs.
Precision CNC High-Strength Alloy Manufacturing: Adopts precision CNC machining integral tool body, hydraulic delay piston assembly, impact energy transmission matching components, featuring outstanding high-pressure fluid erosion resistance, repeated impact fatigue resistance and structural stability, extending long-term continuous bidirectional jarring heavy workover service life.
Application Scenarios
1. Coiled tubing heavy-load downhole intervention jarring treatments including stuck tubing release, downhole metal junk fishing, production tubing/casing cutting, hard formation bridge plug milling and sidetracking directional drilling rotary construction operations
2. Conventional sweet crude oilfield bi-direction hydraulic delay jar bidirectional impact fishing heavy workover service (STD standard service grade)
3. Downhole stuck pipe & junk fishing heavy workover projects requiring bidirectional controllable hydraulic jarring impact, compatible with drop ball actuation tool strings and matched hydraulic accelerator for impact energy amplification
4. Long-term continuous repeated bidirectional impact jarring safety protection for coiled tubing bottom-hole assemblies in onshore and offshore oilfield fishing, milling and cutting heavy workover intervention projects
Standard Delivery Package
Complete bi-direction hydraulic jar integral pre-assembled unit including hydraulic delay piston buffer assembly, bidirectional impact energy transmission structure and standard bottom connection thread
Full factory inspection test report including repeated bidirectional impact fatigue resistance test, integral tensile load test, hydraulic delay stroke buffer performance calibration test and inner through bore drop ball passing smoothness test data
Product dimension drawing and official installation & operation instruction manual, with detailed operation guidance for matching hydraulic accelerator tandem assembly
Quality Warranty & After-Sales Service
Warranty Coverage: 12 months after factory shipment or 2000 cumulative jarring impact cycles, whichever condition is reached first
Full factory inspection: Each finished bi-direction hydraulic jar passes integral tensile load test, repeated bidirectional impact cycle fatigue test, hydraulic delay stroke buffer calibration test and inner bore drop ball passing smoothness test before factory delivery
Free professional technical support: Our oilfield downhole tool engineering team provides coiled tubing fishing heavy workover tool string matching, outer diameter & stroke length selection and hydraulic accelerator tandem assembly matching consultation free of charge
Long-term spare parts supply: All hydraulic delay piston and impact transmission wear accessories are stocked with competitive factory bulk pricing
Custom development service: Support custom outer diameters, customized stroke lengths, hydraulic delay structural parameter modification, bottom thread profiles and special size bi-direction hydraulic jars based on customer technical drawings
FAQ
Q1: What is the core function of a Bi-Direction Hydraulic Jar??
The Bi-Direction Hydraulic Jar is a hydraulic delay bidirectional impact fishing jar for coiled tubing workover. It uses a hydraulic delay mechanism to generate upward jarring impact when lifting the tubing string, and downward jarring impact when slacking off weight. No pre-run setting or adjustment is required before running into the well. It features a large inner through bore allowing drop balls to pass through, and can be combined with a bi-direction hydraulic accelerator to amplify impact force. It is widely used for tubing cutting, plug milling, sidetracking drilling and downhole junk/stuck pipe fishing operations.
Q2: What three core structural advantages does this bi-direction hydraulic jar own??
1. Mature hydraulic delay dual-action bidirectional jarring design, independent controllable upward and downward impact only via simple surface lifting/slacking operation, stable hydraulic buffer performance to avoid uncontrollable sudden impact force; 2. Zero pre-well adjustment operation design, no mechanical setting or calibration work needed before running the tool string into wellbore, greatly simplifying wellsite pre-job preparation work and saving construction preparation time; 3. Large full internal through bore structural design, wide unobstructed inner passage enables all common specification operation drop balls to smoothly pass through the jar body without flow blockage, compatible with drop ball actuation of other functional tools in the same workover string.
Q3: What outer diameter sizes do these bi-direction hydraulic jars 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, 2-3/8"PAC and 2-3/8"REG bottom connection threads compatible with global mainstream coiled tubing connector assemblies, bi-direction hydraulic accelerators and fishing downhole 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 bi-direction hydraulic jars with special outer diameters or customized stroke/hydraulic delay structural 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 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 hydraulic spring compression fatigue, stroke travel calibration 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 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 matched jar tools.
