Downhole tool of high pressure operating cycle capability

A method of expanding a tubular downhole within a wellbore the method comprising:

• providing a tool comprising:
• a tubular body adapted to be connected to other tubular bodies, said tool tubular body having a longitudinal throughbore that permits through passage of fluid, and movably positioned within the tubular body there is located an indexing sleeve and biasing means cooperating with the indexing sleeve to position it preferentially within the tubular body in a first configuration, and an index pin located in the tubular body and engaging with the indexing sleeve such that upon relative axial and/or rotational movement thereof different predetermined configurations of the tool are obtainable, and a valve seat associated with the sleeve and adapted to be plugged by obturator means such that fluid pressure can be increased within the tubular body to effect displacement of the indexing sleeve against the biasing means, whereby by control of fluid pressure the tool can be cycled selectively between a configuration in which fluid flow through the tool is restricted and internal pressure can be increased and a configuration in which fluid flow is permitted and internal pressure can be decreased, and attaching the tool to an end of a tubular to installed within a wellbore,
• running the tool and tubular into the wellbore, and
• introducing the obturating means in a circulation fluid into the tool whereby passage of fluid through the tool is restricted sufficiently to allow sufficient high fluid pressure within the tubular to be achieved as to effect plastic deformation and expansion of the tubular cross-section.

A method of expanding a tubular downhole within a wellbore that comprises:

• providing a downhole tool comprising:
• a tubular body adapted to be connected to other tubular bodies, said tool tubular body having a longitudinal throughbore that permits through passage of fluid, and movably positioned within the tubular body there is located an indexing sleeve and biasing means cooperating with the indexing sleeve to position it preferentially within the tubular body in a first configuration, and an index pin located in the tubular body and engaging with the indexing sleeve such that upon relative axial and/or rotational movement thereof different predetermined configurations of the tool are obtainable, and a valve seat associated with the sleeve and adapted to be plugged by obturator means such that fluid pressure can be increased within the tubular body to effect displacement of the indexing sleeve against the biasing means, whereby by control of fluid pressure the tool can be cycled selectively between a configuration in which fluid flow through the tool is restricted and internal pressure can be increased and a configuration in which fluid flow is permitted and internal pressure can be decreased, and a pressure-actuated expansion tool,
• operably connecting the downhole tool and expansion tool and attaching same to an end of a tubular to installed within a wellbore,
• running the tool and tubular into the wellbore, and
• introducing the obturating means in a circulation fluid into the downhole tool whereby passage of fluid through the tool is restricted sufficiently to allow sufficient high fluid pressure within the tubular to be achieved as to actuate the expansion tool and thereby effect plastic deformation and expansion of the tubular cross-section.