Releasing Spear

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2020年07月08日

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Roschen Releasing Spear provide a positive means to engage and retrieve an internal fish from the well. It is ruggedly built to withstand severe jarring and pulling strains. It engages the fish over a large area without damage of the fish. The simple design avoids the problem of small parts lost or damaged in the hole when operation. It may be used with other equipment such as pack-off assemblies and internal cutters. If the fish cannot be pulled, the spear may easily be released and disengaged. 



Construction


The Releasing Spear consists of a mandrel, grapple, releasing ring, and a bull nose nut.The mandrel is made of specially heat treated high strength alloy steel; and may be ordered either as a flush type to enter completely into a fish or as a shoulder type to provide a positive landing position on top of the fish. Size and type of the upper box connection is provide according to customer’s exact specification. 


When order please specify:


1. The model of the releasing spear.

2. Top connection

3. The exact size and weight of the fish

4. Flush or shoulder type mandrel

Specifications - Releasing Spear
ModelMandrel O.D (mm)Catch size (mm)ThreadConn.Allowed Load (KN)
LM-T608947.4-51.8NC26270
LM-T7310557.4-62NC31380
LM-T8912170-77.8NC38650
LM-T10212182-90.1NC38800
LM-T11412192.4-103.9NC381000
LM-T127162102-115.8NC501300
LM-T140162118.6-127.3NC501500
LM-T168162140-153.7NC502200
LM-T178162150.4-166.1NC502200
LM-T194165168.3-178.5NC502300
LM-T219203190.8-205.76 5/8 REG2300
LM-T245203216.8-228.76 5/8 REG2500
LM-T273203240-258.96 5/8 REG2500
LM-T340203313.6-3236 5/8 REG2500




Segment-Type Spear Grapple


The Segment-Type Spear Grapple enhances the spear’s usefulness by providing an extended catching range beyond the maximum range of the standard one-piece grapple. Roschen Segment-Type Spear Grapple is used in place of the standard one-piece Grapple on the 9 5/8” Spears to convert them to spears capable of engaging up to 20” Casing 


Segment-Type Spear Grapple consists of a grapple body, eight grapple segments, two retainer rings, six retainer ring screws, six retainer ring spacers, and sixteen grapple segment screws. 


Pack-off Assembly


Pack-off Assembly is available for all Roschen Spear Assemblies and is designed to efficiently pack-off all sizes of tubing and casing. Circulation through the fish is enabled by attaching the Spear Pack-off Assembly to the bottom of the spear with a sub type nut. 


Spear Stop Sub


The Roschen Releasing Spear Stop Sub Assembly is an accessory designed to convert a releasing spear with a flush-type mandrel into a shouldered type spear. It is installed in the box connection at the top of the mandrel when the use of a positive stop is desired or required. A stop ring can be added to increase shoulder diameter. All stop rings are furnished with left-hand threads. 


Optional Nuts


Mill Type to mill away burrs, Sub Type to connect and run other tools below the Spear, and Side hill Type to center the spear in greatly oversize holes to assure entry of the Spear into the fish.



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