he jar & accel

Hydra-JarHydra-Jar®®

Double Acting HydraulicDouble Acting HydraulicDrilling JarDrilling Jar

Types of JarsTypes of Jars

• HydraulicHydraulic

• MechanicalMechanical

• Hydro-mechanicalHydro-mechanical

How Does a Jar WorkHow Does a Jar Work

• Energy sourceEnergy source

• Delay mechanismDelay mechanism

• Accelerate the hammer massAccelerate the hammer mass

• Impact/ImpulseImpact/Impulse

• Shock wave propagationShock wave propagation

Energy SourceEnergy Source

=

Detent SystemDetent System

• Delay mechanismDelay mechanism

• Time to apply jar loadTime to apply jar load

• Stores potential energyStores potential energy

• Sudden releaseSudden release

Acceleration of MassAcceleration of Mass

• Release/Conversion of potential energyRelease/Conversion of potential energy

• Mass above JarMass above Jar

• Free contraction rate drillpipeFree contraction rate drillpipe

• Acceleration after jar releaseAcceleration after jar release

• Terminal velocity at impactTerminal velocity at impact

• Kinetic energy = 1/2 MV2Kinetic energy = 1/2 MV2

Creating Kinetic EnergyCreating Kinetic Energy

• Kinetic Energy = 1/2 MV2Kinetic Energy = 1/2 MV2

• Energy = Impact/ImpulseEnergy = Impact/Impulse

• M = Mass (Hammer)M = Mass (Hammer)

• V = Velocity (Stretch/AcceleratorV = Velocity (Stretch/Accelerator®® Tool) Tool)

• Maximise terminal velocity at end of jar free travelMaximise terminal velocity at end of jar free travel

Detent Free TravelDetent Free Travel

Increased free travel length Increased free travel length

delivers moredelivers more

impact energyimpact energy

Affecting EnergyAffecting Energy

• Increase / Decrease amount of Hammer MassIncrease / Decrease amount of Hammer Mass

• Increase Overpull / Set down weightIncrease Overpull / Set down weight

• Add AcceleratorAdd Accelerator®® Tool Tool

Impact / Impulse RelationshipImpact / Impulse Relationship

• Less hammer equals more impact (lb)Less hammer equals more impact (lb)

• More hammer equals more impulse (lb.sec)More hammer equals more impulse (lb.sec)

• Decreasing mass or increasing overpull/set down Decreasing mass or increasing overpull/set down results in increased hammer speed at jar impactresults in increased hammer speed at jar impact

Impulse DecreasesImpulse DecreasesImpact IncreasesImpact Increases

Impact / ImpulseImpact / Impulse

Hydra-JarHydra-Jar®®

Drill CollarsDrill Collars

Hevi-Wate™Hevi-Wate™

Lower Hammer Lower Hammer MassMass

Impulse IncreasesImpulse IncreasesImpact DecreasesImpact Decreases

Higher Hammer Higher Hammer MassMass

Impact Blow at Stuck PointImpact Blow at Stuck Point

700

600

500

400

300

200

100

0

-100

-200

-3000 20 40 60 80 100 120 140

Imp

act

Ja

r B

low

(X

10

00)

mSecs

Impulse = Area Impulse = Area under Curveunder Curve

Peak ImpactPeak Impact

Jar OperationJar Operation

• Safety clampSafety clamp

• Establish the loadEstablish the load

• Set the jarSet the jar

• Fire the jarFire the jar

• Re-set the jarRe-set the jar

• Change out scheduleChange out schedule

Jar Load UpJar Load Up

Weight of Pipe Weight of Pipe AboveAbove Jars Jars++

Hole DragHole Drag++

Desired Jar LoadDesired Jar Load

Jar Load DownJar Load Down

Weight of Pipe Weight of Pipe AboveAbove Jars Jarsminusminus

Hole DragHole Dragminusminus

Desired Jar LoadDesired Jar Load

Detent SystemDetent System

• Delay mechanismDelay mechanism

• Time to apply jar loadTime to apply jar load

• Stores potential energyStores potential energy

• Sudden releaseSudden release

Detent SystemDetent System

• Quick release for optimum impact Quick release for optimum impact speedspeed

• No energy loss at point of releaseNo energy loss at point of release

• Straight push / pullStraight push / pull

• Hydraulic up and downHydraulic up and down

• Temperature compensatedTemperature compensated

Temperature CompensationTemperature Compensation

100100° F° F 500500° F° F

Detent Ring

Hole in Ring

Steel Pin

Hole in Ring

Steel Pin

Up Jar OperationUp Jar Operation

Weight of Pipe SettingSetting

Add Jar LoadAdd Jar Load Wait for Jar to FireWait for Jar to Fire

Detent SystemDetent System

• Delay mechanismDelay mechanism

• Time to apply jar loadTime to apply jar load

• Stores potential energyStores potential energy

• Sudden releaseSudden release

Jar PlacementJar Placement

• Neutral point – AVOID!Neutral point – AVOID!

• Jar tension / compression weightJar tension / compression weight– 20% WOB safety factor20% WOB safety factor

• Mass above jarMass above jar– Recommendation from Jar-Pact™Recommendation from Jar-Pact™

• Account forAccount for– Buoyancy factorBuoyancy factor

– Hole angle factorHole angle factor

Jar-PactJar-Pact™™

Input DataInput Data

• Bottom hole assemblyBottom hole assembly

– O.D., I.D., length, wt/ft.O.D., I.D., length, wt/ft.

• Drill pipe to surfaceDrill pipe to surface

• Additional drill pipeAdditional drill pipe

• HammerHammer

• Well profileWell profile

• Overpull allowanceOverpull allowance

Jars In CompressionJars In Compression

• Optimum hammer mass achieved with DC/HWDPOptimum hammer mass achieved with DC/HWDP

• Add weight slowly, bleeding through detentAdd weight slowly, bleeding through detent

• Open jar before coming out of the holeOpen jar before coming out of the hole

Running Jars in CompressionRunning Jars in Compression

Hydra-JarHydra-Jar®® Use Cautions Use Cautions

• Match O.D. of BHAMatch O.D. of BHA

• Avoid neutral positionAvoid neutral position

• Change out in a timely manner Change out in a timely manner

• Use “Jar-Pact™” Computer ProgramUse “Jar-Pact™” Computer Program

• Do not stand jar in derrick without safety clampDo not stand jar in derrick without safety clamp

Jar Will Not FireJar Will Not Fire

• Stuck above jarsStuck above jars

• Effect of pumpEffect of pump

• Effect of dragEffect of drag

• Time to fireTime to fire

• Cycle the jarsCycle the jars

Extension/Pump Open ForceExtension/Pump Open Force

8" Hydra-Jar 16.1 In2

6 1/2" Hydra-Jar 9.6 In2

4 3/4" Hydra-Jar 6.0 In2 P1

P2

L

L

Picking Up the JarPicking Up the Jar

Lift SubLift Sub

Safety ClampSafety Clamp

Tool Joint Pin Tool Joint Pin ProtectorProtector

Making Up the JarMaking Up the Jar

Safety Safety ClampClamp

Break off Break off lift sublift sub

Make Up Drill CollarsMake Up Drill Collars

Remove Safety Remove Safety ClampClamp

Coming Out of HoleComing Out of Hole

Fit Fit Safety ClampSafety Clamp

BEFORE SETTINGBEFORE SETTINGSLIPSSLIPS

Hydra-JarHydra-Jar®® Features Features

• ConstructionConstruction

• Hardbanding / Standoff subsHardbanding / Standoff subs

• DimensionsDimensions

• Straight push and pullStraight push and pull

• Hydraulic jar up and downHydraulic jar up and down

• Pressure balancedPressure balanced

• Detent system designDetent system design

• Temperature compensatedTemperature compensated

• Super sealsSuper seals

ConstructionConstruction

• 4330 Vanadium Modified steel4330 Vanadium Modified steel– Premium alloyPremium alloy

– Superior hardening propertiesSuperior hardening properties

– Higher torsional and tensile loadsHigher torsional and tensile loads

– Excellent toughnessExcellent toughness

– High Charpy impact properties (Long & Trans)High Charpy impact properties (Long & Trans)

• Plastic coated IDPlastic coated ID– All ID components plastic coatedAll ID components plastic coated

– Greatly improves corrosion resistanceGreatly improves corrosion resistance

OD WearOD Wear

• HardbandingHardbanding– Applied to four areasApplied to four areas

– Reduced OD wearReduced OD wear

• Standoff subs - availableStandoff subs - available– Reduced risk of differential stickingReduced risk of differential sticking

– Increase lifeIncrease life

– Improved hole cleaningImproved hole cleaning

– Reduced torque and dragReduced torque and drag

Hydra-JarHydra-Jar®® Specifications Specifications

Tool ODTool OD 3 3 ⅜⅜ 4 ¾*4 ¾* 6 ½ 6 ½ 88 9 ½ 9 ½

Tool IDTool ID 1 ½ 1 ½ 2 ¼ 2 ¼ 2 ¾ 2 ¾ 33 33

Max Max DetentDetent 44,00044,000 80,00080,000 175,000175,000 300,000300,000 500,000500,000

Up Up StrokeStroke 77 88 88 88 88

Down Down StrokeStroke 77 77 77 77 88

Example Common SizesExample Common Sizes

* Available with 95,000 maximum detent

Drive SystemDrive System

Drive SystemDrive System

Wiper SealWiper Seal

Wear InsertsWear Inserts

PEEKPEEK

HNBRHNBR

Pressure BalancePressure Balance

Neutralizer PistonsNeutralizer Pistons

Hydrostatic PressureHydrostatic Pressure

Balanced PressureBalanced Pressure

Balanced PressureBalanced Pressure

Balance PistonBalance Piston

Hydrostatic PressureHydrostatic Pressure

Pressure BalancePressure Balance

Super SealsSuper Seals

PressureSurface

Shaft ToGland

Clearance

Bevel

SNE (Peek) SSR Major Seal

AcceleratorAccelerator®® Tool Tool

TypesTypes

– Nitrogen filledNitrogen filled

– Fluid filledFluid filled

– MechanicalMechanical

• Energy sourceEnergy source

• Enhances jar impactEnhances jar impact

• Acts as shock isolatorActs as shock isolator

AcceleratorAccelerator®® Tool Tool

DACCH AcceleratorDACCH Accelerator®® Tool Tool

• Enhances impact of Hydra-JarEnhances impact of Hydra-Jar® ® UP & DOWN UP & DOWN

• Provides additional stretch or compressionProvides additional stretch or compression

• Concentrated energy source close to JarConcentrated energy source close to Jar

• Directs shock wavesDirects shock waves

• Reflects damaging shock waves away from rig floorReflects damaging shock waves away from rig floor

PurposePurpose

Impact with Jar & AcceleratorImpact with Jar & Accelerator®® tool tool

287

656

0

100

200

300

400

500

600

700

HWDP W/O Accelerator®

HWDP With Accelerator®

100,000 lbs Overpull at Jar

Thousands

Impact with Jar & AcceleratorImpact with Jar & Accelerator®® tool tool

DACCH AcceleratorDACCH Accelerator®® Tool Tool

• Double-actingDouble-acting

• Drilling or fishingDrilling or fishing

• Place recommended hammer mass between Place recommended hammer mass between AcceleratorAccelerator® ® Tool and Hydra-JarTool and Hydra-Jar®® Tool Tool

• Changes out like Hydra-JarChanges out like Hydra-Jar®® Tool Tool

• Operational parameters same as Hydra-JarOperational parameters same as Hydra-Jar®® Tool Tool

OperationOperation

Stuck Point

DACCH Closes LoopDACCH Closes Loop

Stuck Point

Initial Wave

DACCH Closes LoopDACCH Closes Loop

Stuck Point

Initial Wave

DACCH Closes LoopDACCH Closes Loop

Stuck Point

Initial Wave

Reflection Point

DACCH Closes LoopDACCH Closes Loop

Stuck Point

Initial Wave

Reflection Point

Reflected Wave

DACCH Closes LoopDACCH Closes Loop

Stuck Point

Initial Wave

Reflection Point

Reflected Wave

DACCH Closes LoopDACCH Closes Loop

Shock WavesShock Waves

AcceleratorAccelerator®® Tool increases efficiency of the impact, Tool increases efficiency of the impact,

providing a closed loop for the shock waves. This providing a closed loop for the shock waves. This

concentrates the energy towards the stuck point.concentrates the energy towards the stuck point.

DACCH AcceleratorDACCH Accelerator®® Tool Tool

MaintenanceMaintenance

• Incoming testIncoming test

• DisassembledDisassembled

• CleanedCleaned

• Wet mag-particle inspectionWet mag-particle inspection

• AssembledAssembled

• Hydro-test sealsHydro-test seals

• Simulated downhole testSimulated downhole test

• Data acquisitionData acquisition

Thank-youThank-you