Patched Well Casings Pose Unique Challenges for Anchors

Oil well casings may need to be patched for a variety of reasons. Corrosion, mechanical damage and cement bond failure can all impact the integrity of well casings.

Oil well casing patch (photo courtesy of RML)One of the most common methods of repairing damaged well casings is through the use of casing repair sleeves, which are cylindrical devices designed to cover damaged sections of the casing. They are typically made of high-strength materials and are installed by sliding them over the damaged area and securing them in place with mechanical fasteners. Unfortunately, those patches can also make it extremely difficult to set a new tubing anchor catcher (TAC).

A TAC that is small enough to pass through the casing patch usually isn’t large enough to be securely set in other portions of the well. As a workaround, many operators set the anchor above the patch. If the patch is at 7,000 feet in an 8,000-ft well, that placement may not make an overly detrimental impact. But if that same patch is sitting at 2,000 feet, the TAC isn’t securing the vast majority of the production string, making the tubing much more susceptible to wear and tear and hampering pump efficiency.

A Slimline® TAC Patched Casing

TechTAC® now offers the Slimline® Casing Patch TAC – a made-to-order anchor that’s designed to navigate casing patches while still setting tightly within the rest of the well.

The Slimline® Casing Patch TAC is available in a variety of sizes based on the unique requirements of each patched well. To learn more or get a quote, contact the TechTAC team today!