The ACCH uses a full-strength cones-and-basket cable anchoring method where all internal and external armor wires support the tensions pulled on the cable – the breaking strength of this arrangement is about 85% of the nominal fixed-end cable breaking strength.

• The integrity of this anchoring method is not compromised over multiple runs, a notorious problem of the popular “turned-back armor wires” cable heads that require frequent re-headings.
• This anchoring method is proven to stand the high-tension cycles required when managing a stuck-tool situation without degradation.
• This anchoring method is immune to the tension shocks resulting from the detonation of large perforating guns or pipe-recovery severing tools.

The hydraulic time-delay/mechanical release system of the ACCH ensures that the cable cutting mechanism is only triggered when the tension on the head has been kept above the “Load Lock” tension set before running the tool string in the hole, for a predetermined amount of time, typically between five to ten minutes.

• This proprietary feature allows the safe removal of the cable from the stuck tool and the well using relatively low tensions to avoid stressing and possibly damaging the cable and surface rig-up equipment. The optimum “Lock Load” tension value to set on the ACCH before running in hole is best determined using simulations made with forces-modeling software.
• This proprietary feature prevents the cable cutting mechanism from being unintentionally triggered, while negotiating tight or sticky sections of the well, where momentary overpull events take place.
• This proprietary feature supports the popular practice of holding high tension on stuck tools for few minutes without cutting the cable by simply slacking off the cable tension before the triggering time has elapsed. This sequence can be repeated an unlimited number of times without compromising the functionality of the ACCH.

The ACCH head is fully compatible with the TripSaver Adjustable Wireline Jars (AWJ), these two devices use the same hydraulic time-delay/mechanical release system.

• They both can have similar or different Lock Load tensions settings, while their activations are controlled by the amount of time the tension pulled on the stuck tool string is held above these settings.
• The ACCH is designed to support time-delays of several minutes, while the AWJs is designed to be activated within a minute. Consider the case where the AWJ is set to fire after holding the tension above its 4,000 lb. Lock Load for 40 secs, while the ACCH is set to cut the cable after holding the tension above its 6,000 lb. Lock Load for 10 minutes.

LineSaver Adjustable Cable Cutter Head Types

The 2.75 Cased Hole LineSaver ACCH is designed for wireline logging, well intervention and perforating operations performed with tools deployed with mono-conductor wireline cables.

LineSaver ACCH heads are also available on other formats:

• 3-1/8” to 3-1/2” multi-conductor ACCH for openhole logging and testing/sampling tool strings
• 2-1/8” to 2-3/4” multi-conductor ACCH for slim logging tool strings
• 1-11/16” single-conductor ACCH for well intervention and perforating strings

LineSaver ACCH heads are available with a wide range of BHT and BHP ratings up to 500 F and 35,000 psi.