Torque Tool Class 1-4
ISO 13628-8 Class 1–4 ROV Torque Tool
Description
The Torque Tool Class 1-4 is an ROV torque tool for the ISO 13628-8 Fig 18 Class 1–4 (API 17D) bucket interface, which is used for valve overrides operated by ROV. It has integral torque and turns counting sensors. When matched with a FORUM-supplied torque tool control manifold, the Torque Tool Class 1-4 gives feedback on the torque response of the subsea operation. Alternatively, the supplied FORUM Universal Subsea Display gives a visual read-out of live torque feedback and turns count.
The Torque Tool Class 1-4 is dual range: 405–2700 Nm (300–2000 ft lbs) with the 80 cc motor fitted and 81–405 Nm (60–300 ft lbs) with the 12.5 cc motor fitted. Maximum torque is 2,700 Nm (2,000 ft lbs). For torques below 108 Nm (80 ft lbs), the datasheet recommends the class 1&2 tool. The hydraulic fluid is mineral oil (Tellus 32).
The latching wings of the Torque Tool Class 1-4 are hydraulically driven forward and spring retracted, so they release if hydraulic power is lost; latching strength is 1 tonne @ 160 bar. The motor shares casing oil with the gearbox, so no separate compensator is needed. The sensors are a dual sensor inductive turns count sensor and an internal strain gauge, with an 8 pin Burton electrical connector.
The Torque Tool Class 1-4 is supplied with a Class 1 & 2 socket (11/16" Sq), Class 3 socket (1-1/8" Sq), Class 4 socket (1-1/2" Sq), JIC hose set, low range motor, turns and torque display, 8 pin Burton dummy and operations and maintenance manual, in an offshore-suitable transit case. Spares kits, surface and subsea verification units, a flying lead tool, a torque tool control system and 17H and Petrobras nose adapters are listed as options.