Service Tools

DA-II Unloader

The DA-II Unloader is designed as a high-pressure accessory for compression set packers. This unloader is run above the packer in the open position. After the packer is run to setting depth, the procedures required to set the packer will automatically close the unloader. The J-slot locks in both the open and closed positions. With the packer set and the unloader closed, well operations may proceed.

When run above a compression set packer, this unloader is opened by rotating the tubing 1/4 turn and picking up (standard is right-hand close, right-hand open). After opening the unloader, allow differential pressure to equalize before releasing the packer below.

Special Features

  • Standard J-slot locks in open and closed positions
  • Standard J-slot is right-hand close, right-hand open
  • J-slot is available in various configurations
DA-II Unloader

Product Specifications

Tool OD
Tool ID
Thread Connections
(Box Up / Pin Down)
Part Number Technical Data
4-1/2 3.750 2.00 2-3/8 EUE 53145 PDF
5-1/2 4.500 2.50 2-7/8 EUE 53155 PDF

NOTE: All pricing includes standard Nitrile trim. Other sizes and connections available upon request.