Thru Tubing Straddle patch is a well intervention operation used for remedial solution of various tubing leak challenges, failed downhole completions accessories and many more downhole challenges experienced.
Applications
TT straddle patch remedial operation is used for the following
- Tubing leak along a section of production tubing
- Zonal isolation
- By passing failed completion accessories such as failed Sliding Sleeve Door (SSD), Side Pocket Mandrel (SPM) etc.
Tools Used for TT Straddle Patch
The basic tool used for TT Straddle Patch
- Two Retrievable seal bore packer (Paragon II Packer)
- Anchor Latch Seal assembly
- Blanks
- Polish Bore Receptacle (PBR)
Running & Setting Operation
TT Straddle Patch operation would require only two trips on either Wireline or Coil Tubing. This would be done by firstly running and setting the lower Packer with Anchor Latch Seal Assembly & Blank length depending on the isolation tally. Secondly, running the upper packer with PBR, latch to the first assembly and set Packer.
TECHDaer Straddle Patch assembly can be run in live wells thereby eliminating the need and expense of well kill operations. Also Packer setting provides a superior sealing and anchoring system, Packers are anchored in both directions due to advantage design of bi-directional caged slip enabling the packers hold higher tail pipe loads & eliminating challenges with long patches.
TT straddle patch is available in all tubing sizes. Also in future, packer can be retrieved and thereby completely removing the Straddle Patch if required.
Each packer can be tested along with all connections of the coil tubing as they are run into the well. This allows for removal and replacement of any failed component prior to attempting to flow the well.
TT straddle pack saves the cost of involving a work-over rig to remove completion accessories and replace failed downhole tools. In most wells were production need to be utilized for a certain period of time before making further solutions, TT intervention remains a reliable remedial solution.
Thru tubing well intervention has continuously maintained its stand as the less expensive and effective solution to our downhole challenges.