Through Tubing Strip Carrier Systems

Strip Carrier Perforating is a high performance semi-expendable carrier system for through-tubing applications. The steel-case encapsulated charge mounted on a retrievable steel carrier strip provides a more powerful explosive load than equivalent diameter retrievable hollow scalloped carriers. The carrier strips are recovered after firing with the charge front caps in place, leaving small amounts of debris from the charge case in the well.

• Charges are available in Deep Penetrating (DP) and Super Deep Penetrating (SDP) versions.
• Charges may be loaded with RDX, HMX or HNS (special order upon request).

• The charges may be loaded up to six shots per foot on a Mono-Phased universal strip, or on a high tensile strength Phased (+/- 45 degrees configuration) strip.
• Strip loading is fast and convenient using detonating cord clips.
• In-line positioned firing using magnetic decentralizing device assures maximum penetration of all charges with minimal casing damage due to the protection afforded by the strip.
• The strength and flexibility of the steel carrier strip allows the string to pass through crooked tubing.
• The debris is characterized by small steel chips that gravitate rapidly to the bottom in comparison with aluminum cases debris, which tend to float.
• For operations in high H2S content environment, special equipment must be used.

Below diagram shows the shot pattern made by a 1 11/16” strip carrier. Each mark on the grid represents an individual shot.

Downhole temperature will determine the type of shaped charge and detonating cord to be used. Refer to below Chart-1 for temperature versus time curve. These two factors determine the appropriate O-ring seal material to be used in the assembly. Based on Chart 2 below, Viton O-rings are recommended for Tubing Conveyed Perforating (TCP) systems and Nitrile O-rings are recommended for wireline applications.