double acting, hydraulic drilling jar jar...¢  hydra-jar tool general description the...

Download Double Acting, Hydraulic Drilling Jar Jar...¢  Hydra-Jar Tool General Description The Hydra-Jar ¢® is

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  • Hydra-Jar® Double Acting,

    Hydraulic Drilling Jar

    OPERATIONS MANUAL 6-80

  • Smith Services — HE Group maintains sales agents and representatives in most major oil producing areas of the world. The Houston office will furnish the name and address of our agent or representative in your area at your request.

    The designs and specifications of the tools described in this Operation Manual were current on the effective date of this manual. Smith Services — HE Group, whose policy is one of continuous improve- ment, reserves the right to discontinue models at any time, or to change designs or specifications, with- out notice or without incurring obligation.

    ® Hydra-Jar and Accelerator are registered trademarks of Smith International, Inc.

  • General 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 1–Change 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 2–BF–Mud Weight & Buoyancy Factor Multiplier ..................................................... 14 Table 3–AF–Hole Angle Factor Multiplier ............................................................................ 14

    No Angle ............................................................................................................................................ 15 Core Drilling ...................................................................................................................................... 16 Directional Drilling ............................................................................................................................. 17 Directional Drilling With Motor ......................................................................................................... 18

    Tables & Charts ............................................................................................................................................. 19 Table 4–Hydra-Jar Tool Specifications ................................................................................. 19 Table 5–Hydra-Jar Tool and Accelerator Tool Weight Tables ............................................... 20 Table 6–Amplification Factor ............................................................................................... 21

    Hydra-Jar Tool Fishing Diagram ........................................................................................................ 22 Table 7–Hydra-Jar Fishing Dimensions—inches (mm) ......................................................... 23

    Pump Pressure Extension Chart .......................................................................................................... 27 Delay Times vs. Load ......................................................................................................................... 28

    Operation Manual

    Table of Contents

  • Hydra-Jar Tool

    General Description The Hydra-Jar® is a double-acting hydraulic drilling jar capable of delivering an extra- heavy 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 Tool

    By 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.”

    2

  • Operation Manual

    Advantages of Using a Hydra-Jar Tool

    Universal Use in Oil and Gas Well Operations

    • Drilling • Testing

    • Coring • Offshore

    • Fishing • Cementing

    • Remedial Operations • Sub Sea Service

    • Workover • Directional and Horizontal Drilling

    Easily Adjustable While in Use

    • Adjustable Jar Impact

    • Selective Up or Down Impact

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