AD-1 Tension Packer

Applications

• Formation fracturing in shallow or low-fluid level wells where set-down weight is not available
• Waterflooding operations

Features & Benefits

• Short And Compact - Increases the efficiency of handling, shipping, and storing of the tool
• Rocker-Type Slip Design - Eliminates the need for extra drag blocks, slip tie links, and guide grooves, allowing for shorter overall length but ones permanently free from stuck or cocked slips.
• Easy To Operate - A simple and reliable J-Slot mechanism, actuated from the surface by tubing rotation, makes the packer easy to set and release.
• Packing Element System - For temperatures up to 250º F, the standard 80 D (durometer) element can be used with sizes 41 through 51, and for applications above 250º F, a 90 D element is available.  The Size 53 and 55 tools use a 70 D element, rated to 225º F. Standard and alternate elements are also available for higher temperatures.
• Full-Bore - Larger than tubing drift diameter.  Any instruments capable of passing thru the tubing can be run thru the packer.  Full ID also assists in preventing screen-out and subsequent plugging of the tubing during fracturing.
• Redress Kits available, extending tool life
• Alternate Body with Larger ID - Body with 1.978 in. ID (Size 43 only) is available for use in areas where a pump is run, or where customer desires to swab below the tool.

The Evolution AD-1 Tension Packer (also known as the STP-1 Packer) provides a compact, economical retrievable packer for use where a set-down type packer is impractical due to pressure requirements.  Although designed primarily for waterflooding, this packer can also be used for such pressuring operations as formation fracturing in shallow or low-fluid-level wells.

Along with the regular AD-1, Evolution also offers the ADL-1 Packer, a larger bore version of the tool.

Operation

To Set Packer

Run the packer to desired setting depth, making the last movement down before attempting actual set.   Rotate the tubing to the left one-quarter turn at the tool, and pick-up on the tubing string to obtain pack-off.  Refer to chart below for upstrain required to set the various size packers.

To Release

Lower the tubing string at least one (1) foot more than is necessary to remove the applied tension (this will move the J-Pin to the top of the J-Slot) and rotate to the right sufficiently to obtain one-quarter turn at the packer..

Emergency Release

For use under extreme conditions, two safety release methods are available.

1.   The AD-1 Packer has an emergency Shear Ring installed on the Body, below the Guide.  Application of from 25,000 to 50,000 lbs. tension (dependent on strength of Shear Ring) will shear the Shear Ring, permitting the Cone, Packing Element and Guide to drop against the Bottom Sub where they will remain as the Packer is retrieved from the well.

2.   If it is not desirable or practical to pull 50,000 lbs. through the tubing, apply approximately 10,000 lbs. strain and rotate the tubing 20 or more turns to the right.  This unscrews the left-hand safety thread between the Top Sub and the Body and allows removal of the tubing string and the Top Sub.  To remove the remaining portion of the Packer, install a set of Jars made up above an overshot, socket or spear (or the Top Sub), engage the Packer Body and actuate the Jars to free the Packer Body from the casing.

Redress Kits (including such items as packing elements, seal rings, etc.) are available.