Cable Working Equipment Products
Dynamic Load Monitoring Ltd. (DLM)
DLM’s long involvement operating in and supplying to the Cable Laying Industry has led to the development of a multitude of products to support operations. From a host of Grapnels for PLGR operations, Saddleback Monitors to measure cable Tension right through to rigging and deck equipment.
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Flatfish Grapnel
The Flatfish Grapnel consists of a large diamond-shaped plate with two prongs. A wide semi-circular seat is set at the base of the prongs.
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Gifford Grapnel
The Gifford Grapnel is usually used in conjuction with the Rennie. It is made up in units of four hooks at right angles to each other. The hooks resemble a crane hook with a broad hook seat to form a cup to hold the hooked cable. It can be used on any type of bottom but originally designed for rocky or coral environments.
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Sandpoint Grapnel
The Sandpoint Grapnel is manufactured from high strength structured steel. The sizes normally used are 115kgs, 180kgs and 250kgs and this will depend on penetration requirements.
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Sliding Prong Grapnel
The sliding Prong Grapnel comprises a square cross-section shank on which are slid double prongs in alternate directions. Broken or damaged prongs can be slipped off and renewed. Prongs are in three sizes, known as A, B and C. Type C is the largest prong and is usually used when the cable is believed to be buried.
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Jamming Grapnel
The Jamming Grapnel can be used as part of a longer grapnel train for clearing the route prior to laying a cable or recovering a subsea cable.
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Spearpoint Grapnel
The Spearpoint grapnel consists of a shank with five prongs with reinforced tips.
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Small Rennie Grapnel
The Rennie Grapnel is usually used in conjunction with the Gifford. The Rennie Grapnel is built up of flat links, the fluke passes through the body and is then welded onto it. The links are joined together in sets of four in the form of a chain, successive links and flukes being at right angles to each other. Flukes can be detached for renewal when required.
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Large Rennie Grapnel
The Rennie Grapnel is usually used in conjuntion with the Gifford. The Rennie Grapnel is built up of flat links, the fluke passes through the body and is then welded onto it. The links are joined together in sets of four in the form of a chain, successive links and flukes being at right angles to each other. Flukes can be detached for renewal when required.
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Detrenching Grapnel
The Detrenching Grapnel is manufactured from high tensile steel, suitable for withstanding the harsh offshore environments. The structure and material of the grapnel is tested using finite element analysis which is performed during the design phase. This simulates the various stresses and strains acting on the grapnel in a variety of differentseabed conditions and allowed for optimisation of the design.
