초록 ▼

A completions insertion and retrieval under pressure (CIRP) apparatus utilizes a snaplock connector to assemble uphole a tool string of any desired length prior to lowering the tool string into a wellbore for performing wellbore operations in the wellbore. The tool string could comprise a perforatin

A completions insertion and retrieval under pressure (CIRP) apparatus utilizes a snaplock connector to assemble uphole a tool string of any desired length prior to lowering the tool string into a wellbore for performing wellbore operations in the wellbore. The tool string could comprise a perforating gun string including a plurality of perforating guns interleaved with a corresponding plurality of snaplock connectors. The CIRP apparatus includes a winch housing connected to a lubricator, the lubricator being connected to a valve, the valve being connected to a connection apparatus, such as a deployment BOP or a snaplock operator, the connection apparatus being connected to a work string which extends into the wellbore. When the valve is opened and the lubricator is pressurized, a second wellbore tool, which includes a third section of a snaplock connector, is disposed in the lubricator and a first wellbore tool, which includes a first and second section of a snaplock connector, is being held by the connection apparatus. The second wellbore tool is lowered by the winch through the lubricator into contact with the first wellbore tool, and the third section is connected to the second section of the snaplock connector. The connection apparatus releases its hold on the first wellbore apparatus, the winch lowers the second wellbore apparatus into the connection apparatus, and the connection apparatus holds the second wellbore apparatus until a third wellbore apparatus is connected to the second wellbore apparatus thereby creating a tool string. As a result, the tool string of any desired length can be build uphole before lowering the the tool string downhole for performing wellbore operations during one trip into the wellbore.

대표청구항 ▼

[ We claim:] [1.] Apparatus adapted for use in connection with wellbore operations in a wellbore, comprising assembling means for assembling a tool string of any desired length which is adapted to be disposed in said wellbore and for lowering said tool string into said wellbore when said tool string

[ We claim:] [1.] Apparatus adapted for use in connection with wellbore operations in a wellbore, comprising assembling means for assembling a tool string of any desired length which is adapted to be disposed in said wellbore and for lowering said tool string into said wellbore when said tool string is assembled, said tool string performing said wellbore operations when said tool string is lowered into said wellbore, said tool string including a first part and a second part, said assembling means including,holding means for holding said first part of said tool string in a work string, said first part including a first connector, andlowering means for lowering said second part of said tool string having a second connector into said work string until said second connector of said second part contacts said first connector of said first part,said holding means allowing said second connector of said second part to be connected to said first connector of said first part when the lowering means lowers said second connector of said second part into contact with said first connector of said first part,said holding means releasing the hold on said first part of said tool string when said holding means connects said second connector of said second part to said first connector of said first part,said lowering means lowering said second part and said first part of said tool string into said wellbore when said holding means releases the hold on said first part of said tool string said, second part and said first part of said tool string performing the wellbore operations when said lowering means lowers said second part and said first part of said tool string into said wellbore,wherein said first connector of said first part comprises a first section and a second section, said first section adapted to be inserted into one end of said second section, said second section being twisted and rotated with respect to said first section when said first section is inserted into said second section of said first connector and a twisting force is applied to said second section of said first connector with respect to said first section of said first connector,wherein said second connector of said second part comprises a third section adapted to be inserted into the other end of said second section when said twisting force is applied to said second section with respect to said first section of said first connector and said second section is twisted and rotated with respect to said first section,said third section of said second connector being locked into said second section of said first connector when said third section is inserted into said other end of said second section and said twisting force being applied to said second section relative to said first section of said first connector is reduced,wherein said holding means comprises:a first piston adapted to move and a slip adapted to swivel about a center in response to the movement of said first piston, said slip holding said first section of said first connector when said first piston moves and said slip swivels about said center in response to the movement of said first piston; anda second piston adapted to move, a slot, a ring on said second piston adapted to slide in said slot when said second piston moves, and a rack connected to said ring adapted to grip said second section of said first connector and apply said twisting force to said second section relative to said first section when said ring slides in said slot in response to the movement of said second piston,the lock of said third section to said second section being released when said twisting force is applied by said rack to said second section while said slip holds said first section,the lock of said third section of said second connector to said second section of said first connector being applied when said twisting force applied by said rack to said second section is reduced while said slip holds said first section. [8.] A method of perforating long length intervals of a wellbore during a single run into the wellbore, comprising the steps of:(a) holding a first perforating apparatus in a hold apparatus,(b) connecting a second perforating apparatus to the first perforating apparatus,(c) releasing the first perforating apparatus from the holding apparatus,(d) holding the second perforating apparatus in said holding apparatus,(e) connecting a firing head apparatus to the second perforating apparatus,(f) releasing the second perforating apparatus from the holding apparatus,(g) lowering the first and second perforating apparatus and the firing head apparatus downhole, and(h) perforating the long length interval of the wellbore;wherein said first perforating apparatus includes a first perforating gun and a first connector connected to the first perforating gun, said first connector including a first section anda second section connected to the first section, said holding apparatus including a first means for holding said first section and a second means for twisting said second section while said first means holds said first section of said first connector,the holding step (a) for holding the first perforating apparatus in the holding apparatus comprising the steps of:(a1) grasping, by said first means said first section of said first connector of said first perforating gun; and(a2) twisting, by said second means, said second section of said first connector while said first means grasps said first section;wherein said first means includes a slip adapted to swivel about a center, said second means including a slot, a ring slidable in said slot, and a rack adapted to expand into contact with said second section in response to the sliding of said ring in said slot, the grasping step (a1) including the steps of:(a11) swiveling said slip about said center, and(a12) grasping by said slip said first section of said first connector of said first perforating gun.