Wells – Means for perforating – weakening – bending or separating pipe... – With disparate below ground feature
Patent
1995-06-07
1996-11-19
Tsay, Frank
Wells
Means for perforating, weakening, bending or separating pipe...
With disparate below ground feature
166 557, 166 63, 166212, E21B 2902
Patent
active
055753310
ABSTRACT:
A downhole chemical cutting tool for cutting downhole tubular goods and supporting the tubular goods within the well through a load bearing hub section in the tool. The tool comprises an elongated tool body having a upper head section which is adapted to be connected to a running string such as a string of coiled tubing capable of supporting large loads. The tool body comprises a propellent section and a cutting section. A chemical section is interposed between the propellant section and the cutting section and contains at least one chamber adapted to contain a chemical cutting agent. The cutting section is adapted to receive the chemical cutting agent and has an outer wall section which contains a plurality of transverse cutting ports arranged circumferentially of the cutting section. An anchoring section is provided in the lower portion of the tool body at a location below the cutting section so that suitable means can be attached to the anchoring section to grip the inner surface of the tubular goods below a point at which the cut is to be made. A load bearing hub section in the tool body extends longitudinally through the cutting section to the anchoring section. The hub section functions to connect the anchoring section to the upper portion of the tool body in a load bearing relationship and capable of sustaining a substantial loads in tension. The tool comprises a plurality of longitudinally extending flow passages which are spaced circumferentially about the hub section and extend longitudinally along the hub section. These are in fluid communication with the chemical section so that when the tool is fired a chemical cutting agent can flow from the chemical section through the passageways to the cutting ports. The flow passages are provided with individual accumulations of ignitor material to provide for pre-ignition of chemical cutting agent as it is dispensed from the cutting ports.
REFERENCES:
patent: 2918125 (1959-12-01), Sweetman
patent: 4125161 (1978-11-01), Chammas
patent: 4415029 (1983-11-01), Pratt et al.
patent: 4494601 (1985-01-01), Pratt et al.
patent: 4619318 (1986-10-01), Terrell et al.
patent: 4819728 (1989-04-01), Lafitte
patent: 4949789 (1990-08-01), Lafitte
patent: 4971146 (1990-11-01), Terrell
patent: 5287920 (1994-02-01), Terrell
patent: 5320174 (1994-06-01), Terrell et al.
patent: 5322118 (1994-06-01), Terrell
Halliburton Company
Tsay Frank
LandOfFree
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