54023966 hydra jar operations manual

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Hydra-JarDouble Acting, Hydraulic Drilling JarOperations Manual 6-80Revision April, 2002

Smith Services HE Group maintains sales agents and representatives in most major oil producing areas of the world. The Houston ofce will furnish the name and address of our agent or representative in your area at your request. The designs and specications of the tools described in this Operations Manual were current on the effective date of this manual. Smith Services, whose policy is one of continuous improvement, reserves the right to discontinue models at any time, or to change designs or specications without notice or without incurring obligation.

Hydra-Jar

and Accelerator are registered trademarks of Smith International, Inc.

Table of ContentsGeneral Description ........................................................................................................................................... 2 Control of Hydra-Jar Tool ...................................................................................................... 2 Advantages of Using a Hydra-Jar Tool.................................................................................................. 3 Universal Use in Oil and Gas Well Operations........................................................................ 3 Easily Adjustable While in Use ............................................................................................... 3 Long Term Capability .............................................................................................................. 3 Fishing Operations ............................................................................................................................................... 3 High Strength Construction ..................................................................................................... 3 Directional Drilling .................................................................................................................. 3 Double-Acting Hydraulic Hydra-Jar Tool ............................................................................... 4 Operation ........................................................................................................................................................... 5 Going in the Hole................................................................................................................................... 5 Jar Safety Clamp ...................................................................................................................... 5 Picking Up the Hydra-Jar Tool ................................................................................................ 5 Jar Load ................................................................................................................................................. 8 Establishing the Jar Load....................................................................................................................... 8 Changing the Jar Load ............................................................................................................. 8 Jar Cycle ................................................................................................................................................ 8 Changing the Jar Cycle ............................................................................................................ 9 Up-Jarring Operation ............................................................................................................................. 9 Down-Jarring Operation ........................................................................................................................ 9 Up and Down Jarring Operations ........................................................................................................ 10 Setting the Hydra-Jar Tool Prematurely .............................................................................................. 10 Increasing Effectiveness ...................................................................................................................... 10 Using the Mud Pump ............................................................................................................. 10 Using Drill Collar Weights..................................................................................................... 10 Using the Accelerator Tool .................................................................................................. 10 Coming Out of the Hole ...................................................................................................................... 11 Change Out Recommendations ........................................................................................................... 12 Table 1Change Out Recommendations................................................................................ 12 Placement .......................................................................................................................................................... 13 Optimum Hydra-Jar Tool Position....................................................................................................... 13 Hydra-Jar Tool In Tension...................................................................................................... 13 Placing Hydra-Jar Tool In Compression ................................................................................ 13 Jar Tension Drilling Weight (JTDW) ..................................................................................... 14 Transition Zone ...................................................................................................................... 14 Weight Correction Tables..................................................................................................................... 14 Table 2BFMud Weight & Buoyancy Factor Multiplier ..................................................... 14 Table 3AFHole Angle Factor Multiplier ............................................................................ 14 No Angle .............................................................................................................................................. 15 Core Drilling ........................................................................................................................................ 16 Directional Drilling.............................................................................................................................. 17 Directional Drilling With Motor .......................................................................................................... 18 Tables & Charts ............................................................................................................................................... 19 Table 4Hydra-Jar Tool Specications .................................................................................. 19 Table 5Hydra-Jar Tool and Accelerator Tool Weight Tables................................................ 20 Table 6Amplication Factor ................................................................................................ 21 Hydra-Jar Tool Fishing Diagram ......................................................................................................... 22 Table 7Hydra-Jar Fishing Dimensionsinches (mm)......................................................... 23 Pump Pressure Extension Chart........................................................................................................... 27 Delay Times vs. Load .......................................................................................................................... 28

Operation Manual

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General DescriptionThe Hydra-Jar is a double-acting hydraulic drilling jar capable of delivering an extraheavy impact when a bottomhole assembly becomes stuck. Designed to operate as an integral part of a drillstring, it can withstand:

Temperatures up to 500 F. Pressure differentials of 10,000 psi dynamic and 20,000 psi static. Normal drilling conditions of torque, pump pressure and long term use.

The Hydra-Jar tool can easily be racked as part of a stand of drill collars because it is similar in length and diameter, and has compatible connections and slip setting areas. In the drilling mode, the jarring mechanism is disengaged and is not affected by normal drilling conditions or torque.

Control of Hydra-Jar ToolBy adjusting the amount of surface push or pull (no torque or external adjustments are required) the operator can deliver very light or maximum impacts in either direction, while controlling the number of impacts in any given time frame.

If the drillstring becomes stuck on bottom, the Hydra-Jar tool can deliver impact in an up-only direction. If the drillstring becomes stuck off of the bottom, the Hydra-Jar tool can deliver impact in a down-only direction. When differential sticking is encountered, and movement is needed to regain rotation and circulation, the Hydra-Jar tool will up-jar and down-jar.

Hydra-Jar Tool

General Description

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Advantages of Using a Hydra-Jar ToolUniversal Use in Oil and Gas Well Operations Drilling Coring Fishing Remedial Operations Workover Testing Offshore Cementing Sub Sea Service Directional and Horizontal Drilling

Easily Adjustable While in Use Adjustable Jar Impact Selective Up or Down Impact Variable Jar Time Cycle and Jar Intensity Operation Adjusted by the Working Load

Long Term Capability Completely Hydraulic Back-up Seal Systems High Degree of Reliability

Fishing Operations Variable Impacts Straight Push-pull Large Inside Diameter

High Strength Construction High-strength ductile materials Key components are cold-worked, for better fatigue l

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