Capsule Gun Perforating Systems

Capsule guns—also called "capsule-charge guns"—are exposed gun systems, with the individual shaped charges sealed in pressure-tight protective capsules mounted on a carrier strip or links that are exposed to the well environment.

Capsule guns are typically used in through-tubing perforation applications and generate superior performance compared with hollow carrier guns of the same diameter. Schlumberger capsule guns are developed through an extensive engineering and manufacturing program. They are holistically designed as a system, comprising the carrier strips or links, charges, and detonating cords, to provide maximum perforator performance. The entire capsule gun system is then manufactured following rigorous Schlumberger QA standards.

There are two designs of capsule guns: expendable (the charges and mounting assembly are left as debris after firing) and retrievable (debris is left, but the mounting is recovered). The latter design is also called semiexpendable. Some capsule gun systems have a selectivity option that allows shooting more than one zone per run.

PowerSpiral

The PowerSpiral retrievable perforating gun system for through-tubing wireline operations incorporates shock-absorbing material between the charges to attenuate shock waves during the detonation and significantly increase shot performance.

Enerjet

Enerjet high-performance exposed capsule gun systems for through-tubing operations are available in retrievable and expendable versions.

Pivot Gun

Pivot Gun systems are wireline through-tubing guns with excellent performance, ideal for workover reperforating or shooting past deep formation damage.

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