Drilling Jars

The Logan Superior Energizer is designed to match a corresponding size of Logan Superior Hydraulic Fishing Jar. It is run in conjunction with the Fishing Jar to supply intensified impact during jarring action.

OVERVIEW

The Logan Superior Energizer is essentially a fluid spring that stores energy when a strain is pulled on the fishing string. Its function is to increase the impact energy delivered to the stuck fish by the Logan Superior Hydraulic Fishing Jar and the collars used to supply the impact energy. When the strain is removed by the free stroke of the fishing jar, the stored energy is released, accelerating the collars upward until a blow of high impact is struck. The hydraulic fluid contained in the tool cushions much of the jarring shock from the rebounding string after each stroke to protect tools and string from damage.
Variable load is controlled by applying a lighter or heavier pull on the working string. A light pull will create light impact and a heavy impact will create hard impact at the strike point.
The Logan Superior Energizer is run in conjunction with a Logan Superior Hydraulic Fishing Jar of the same size.
Each size of Logan Superior Energizer is designed to match a corresponding size of Logan Superior Hydraulic Fishing Jar.

OPERATION

The Logan Superior Energizer is installed in the string when maximum jarring impact and impulse are needed, particularly in shallow, deviated, or directional holes. Running strings lack stretch at shallow depths. Acceleration and effectiveness of the jarring assembly are diminished due to the small amount of available stretch. In deviated or directional holes, friction between the running string and the wall of the hole will often diminish accelerated movement. In these cases, much of the energy will be lost. The Logan Superior Energizer provides a means to store the required energy immediately above the drill collars and fishing jar to offset the loss of stretch or drag on the running string. In conventional jarring operations, using either hydraulic or mechanical jars, the intensity of a blow is a function of, and is proportional to the accelerated movement of the entire running string above the fishing jar.
Avoid running the tools at a highly deviated point or in the curve of a directional hole. Isolate the Logan Superior Hydraulic Fishing Jar and Logan Superior Energizer from stiffer sections of the string with flexible joints.
The Logan Superior Energizer is simple to use and requires only a straight pull at a speed determined by the job. It is completely safe to assemble since no high-pressure pre-loading is required.
All internal and external threaded connections are tightened to the recommended torque at the Logan manufacturing facilities prior to shipment. Check all external connections after use to ensure proper torque is maintained.
CAUTION: Tong the Superior Energizer approximately four inches from the threads. Do not tong the threads. Doing so will damage the tool.

USE WITH THE LOGAN SUPERIOR HYDRAULIC FISHING JAR

The Logan Superior Energizer is always used with a Logan Superior Hydraulic Fishing Jar. Use of the Logan Superior Energizer allows the use of fewer drill collars than would otherwise be possible. This is especially true when operating in shallow depths where sometimes too many drill collars are used to replace available stretch in the string with mass. Using drill collars to achieve mass should be avoided as this practice often damages tools and the running string.
It is recommended that no less than two joints of drill collars or no less than four joints of heavyweight drill pipe be installed between the Logan Superior Hydraulic Fishing Jar and the Logan Superior Energizer.

RIG UP

Fill the Logan Superior Energizer with the correct Logan Energizer Fluid (see page 13) and test the tool in a Logan Jar Tester (see page 7) or equivalent test fixture to verify performance.
Before using, carefully examine the Logan Superior Energizer to be sure the tool has been properly assembled and filled, and that there is no leakage.
To achieve maximum effect from jarring action, the Logan Superior Energizer should be installed in the string immediately above the drill collars, heavyweight drill pipe, an d other concentrated mass located between the Logan Superior Hydraulic Fishing Jar and Energizer.
Except when flexibility is required for bending, there should be no change in weight per foot in the first 1,000 feet in the working string directly above the Logan Superior Energizer.

NOTE: The Logan Superior Energizer is shipped from the factory in the closed position. The Superior Energizer is installed between the running string (tubing or drill pipe) and the jarring mass (i.e. drill collars) that are located directly above the Logan Superior Hydraulic Fishing Jar. When the tool is elevated, the mandrel will stroke open two to three inches before elevating the attached fishing assembly. This is part of the temperature compensating design feature that makes the Logan Superior Energizer unique. Once the tool is lowered into the well, downhole temperature will expand the energizer fluid and close this gap, increasing the working stroke of the tool. When the fishing string is pulled from the well, the Logan Superior Energizer will once again stroke open two to three inches. This gap may be somewhat greater if a heavy length of fish is being recovered.
WARNING: The Logan Superior Fishing Jar is shipped from the factory in the closed (cocked) position.
The closed Superior Fishing Jar should not be left suspended in the elevator, especially with any significant amount of weight suspended below it, as the tool may open and drop the length of its stroke, causing damage or injury.

JARRING

Velocity and relative impact load of a blow is controlled by the amount of stretch in the running string (pull load) and weight of the drill collars installed above the Logan Superior Hydraulic Fishing Jar. It is necessary to install similar weight above the Logan Superior Energizer for a minimum of 1,000 feet to lessen the reverse inertia on the fishing jar. Apply the minimum pull load above the weight of the drill collars and string to obtain an effective blow.
CAUTION: Maximum pull load on the fishing jar should not be exceeded at any time during the pull cycle.

1. To strike the initial blow, set the string down to ensure the fishing jar is losed. Raise the string by applying the desired pull load on the fishing jar.
2. Set the brake and wait for the jar to strike. Depending on depth of operation, amount of stretch on the string (pull load), downhole temperature, hole condition, and other variables, the initial blow may take from a few seconds to several minutes.
3. Close the jar and repeat. It is only necessary to close the jar before stretching the string to strike the next blow. Any desired pull load, up to the maximum pull load for the jar, may be struck on subsequent blows. The Logan Superior Energizer can transmit full torque in either direction at all times while maintaining full circulation throughout the tool.

RIG MAINTENANCE

No specific action is required for rig down. In most cases, after moderate use on a short job, minor maintenance may be performed on the rig floor. After inspecting the rig floor for oil leaks, lay the Logan superior Energizer on the derrick floor.
It is recommended that the Logan Superior Energizer should not remain suspended in the elevator for extended periods.
NOTE: The Logan Superior Energizer is shipped from the factory in the closed position. The Superior Energizer is installed between the running string (tubing or drill pipe) and the jarring mass (i.e. drill collars) that are located directly above the Logan Superior Hydraulic Fishing Jar. When the tool is elevated, the mandrel will stroke open two to three inches before elevating the attached fishing assembly. This is part of the temperature compensating design feature that makes the Logan Superior Energizer unique.
Once the tool is lowered into the well, downhole temperature will expand the energizer fluid and close this gap, increasing the working stroke of the tool. When the fishing string is pulled from the well, the Logan Superior Energizer will once again stroke open two to three inches.
This gap may be somewhat greater if a heavy length of fish is being recovered.
WARNING: The Logan Superior Fishing Jar is shipped from the factory in the closed (cocked) position. The closed Superior Fishing Jar should not be left suspended in the elevator, especially with any significant amount of weight suspended below it, as the tool may open and drop the length of its stroke, causing damage or injury.
Immediately remove the Logan Superior Energizer from the fishing string and flush all mud from the bore, especially from inside the washpipe.

The Logan Superior Hydraulic Fishing Jar utilizes a special valve section to meter oil from one side of the piston to the other side for controlled jarring action. Its large mandrel design makes it well suited for milling and wash over operations.

FEATURES

Smooth, shock-free torque reduces drill string damage
Fits most drilling and workover masts
Allows use of longer drill string lengths
Power unit torque limits can be set
Separate rotary swivel is unnecessary
Choice of diesel engines
Increased environmental safety features on skids and trailers
Easy to service

Superior Hydraulic Fishing Jar

GENERAL DESCRIPTION

The Logan Superior Hydraulic Fishing Jar is a straight pull, up only, jarring tool that utilizes a special valve section to meter oil from one side of the piston to the other side. This allows for controlled jarring action during a stuck fish recovery. The straight pull load being applied by the operator controls the intensity of the jarring blow. A lighter pull load provides a lighter jarring blow, while a heavier pull load provides a heavier jarring blow. The jarring blow is infinitely adjustable down hole during the jarring operation without any rig floor adjustments being required prior to the run.
Simply vary the pull load to change the jarring blow. During the re-cocking cycle of the Jar, a very light load is required since no metering of oil is done during the re-cocking. Oil is returned through large ports during the re-cocking which requires only enough load to overcome friction. This light re-cocking load allows the operator to hit a series of very rapid blows if needed to free the stuck fish.
The Jar’s operating chambers are both sealed and isolated from each other to prevent contamination of the metering section of the Jar. The impact section of the Jar utilizes a heavy anti-galling grease to lubricate the splines and impact faces. The metering section utilizes special grade hydraulic oil (viscosity @ 40°C, CsT 22.00) for metering and lubrication of the tool. The sealed chambers prevent well contamination in these areas. Logan Superior Hydraulic Fishing Jars are hydrostatically pressure balanced and provide maximum inside diameters for passage of wireline tools.

APPLICATION

A Logan Superior Energizer should be installed in the string when maximum jarring impact and impulse are needed.

This is especially true in shallow, deviated, or directional holes.

CAUTION: The Superior Energizer should be located above all concentrated mass (drill collars, heavyweight drill pipe, etc.) that is immediately above the Jar. This concentrated mass is used to provide the impact and impulse at the stuck point while jarring. The working string above the Superior Energizer should not have a “weight per foot” change for at least 1,000 feet of string directly above the Superior Energizer. The only exception is for a lighter joint screwed directly into the Superior Energizer for flexibility when needed for bending. No mass above the Superior Energizer improves the jarring results at the stuck point. Concentrated weight mass above the Superior Energizer can cause the impact to occur and result in damage to the Superior Energizer, Jar, BHA components, or the fish. In deviated, directional, or oversized holes, any Jar and Energizer should be isolated from stiffer sections by a more flexible joint of string. This will protect tools and other string components from excessive bending loads that can result in fatigue failure.It is recommended that not less than two (2) joints of drill collars and not less than four (4) joints of heavy-weight drill pipe be run between the Logan Superior Hydraulic Fishing Jar and the Superior Energizer or between the Jar and the working string. However, if this is absolutely necessary or desired, care should be taken to avoid excessively high impact loads.
Fishing, Milling, and Washover
For fishing operations, the Logan Superior Hydraulic Fishing Jar should be placed immediately below a string of concentrated mass (drill collars, heavyweight drill pipe, etc.).
The Logan Superior Hydraulic Fishing Jar is well suited to milling and washover due to its larger integral mandrel design.
Formation Testing The Logan Superior Hydraulic Fishing Jar is ideal for use in drill stem testing. This will not interfere with the test equipment and does not cause the test to be lost when jarring becomes necessary. The seals used in the Logan Superior Hydraulic Fishing Jar will handle much higher pressures than are normally encountered in drill stem testing.
The Logan Superior Hydraulics Fishing Jar is ideal for freeing open-hole or hook-wall packers if they become stuck enough to require jarring. One or two jarring blows will usually free the packer. The hook-wall packer sticks less often than the open-hole type, but requires higher jarring to free it.
Coring Breaking a core without a Jar in the string can require considerable pull load on the drill pipe. When a Jar is used, only a comparatively moderate pull is usually required to deliver an impact sufficient to break the core.

OPERATION

Preparation

Carefully examine the Logan Superior Hydraulic Fishing Jar before use to ensure it has been properly assembled and filled with jar oil. The tool should be tested in a jar tester prior to field use. Check all connections to ensure they are tightened to the proper torque. (See Chart C — Recommended Tightening Torques on pages 16 – 17.)

RIG UP

WARNING: The Logan Superior Hydraulic Fishing Jar is shipped n the closed or cocked position.
When closed, the Jar should not be left suspended from the elevator, especially with any appreciable weight suspended below it. When in this position, the Jar can fire causing damage to the rig or bodily harm. The Logan Superior Hydraulic Fishing Jar should be carefully opened and assembled in the string below the concentrated mass (drill collars, heavyweight drill pipe, etc.).
It is recommended that a Logan Superior Energizer be run with the Superior Hydraulic Fishing Jar for maximum effectiveness.

JARRING

Before use, carefully examine the Jar to ensure it has been properly assembled and is filled with jar oil. The tool should be tested in a jar tester prior to field use.
Check all connections to ensure that they are tightened to the proper torque.
(See Chart C — Recommended Tightening Torques on pages 16 and 17.)
WARNING: At no time during the pull cycle of the fishing jar should the maximum recommended load be exceeded. (See Chart B — Strength and Test Data on pages 16 and 17 for pull loads).
It is recommended that a low initial pull load of 30% to 50% of the maximum load be used so the operator can see the effects of the jarring action before increasing the jarring load.
If a Superior Energizer is being used, the minimum applied pull load should be per the minimum pull required (above weight of string and collars) to obtain effective blows per strength data chart in the Logan Superior Energizer instruction manual.
Jarring Procedure
1. To strike the initial blow, set the string down to ensure the Jar is fully closed. Raise the string, applying the desired over-pull at the Jar.
2. Set the brake and wait for the Jar to strike its blow. The first blow could take from a few seconds to several minutes due to hole conditions such as temperature, depth, amount of stretch in string, and the amount of over-pull.
3. Close the Jar and repeat the process. Increase the load as required to free the stuck fish.
WARNING: Do not exceed the published maximum load for the tool.