Selective mono bore diverter system
AssigneeBaker Hughes Incorporated
InventorsMark McCorry, David George Forsyth, Robert C. Smith, David Cameron
Life of this patent
Estimating the term…
Abstract
The invention provides a selective system of placing a guide stock into a wellbore by braided line, coil tubing or drill pipe. The device facilitates selective intervention by providing a selective orientation key an angular relationship to the lateral through a system of selective keys and dogs allowing the diverter of the guide stock to be aligned at any desired angle with the orientation sub. The orientation sub includes a key for picking up on a helical slot in the packer to rotate the assembly and a set of selectively profiled dogs to engage a selected packer and halt downhole movement of the device.
Claims12
A diverter system for intervention of a lateral borehole comprising:
- a target packer, of one or more packers, having a 360.degree. helical slot and a unique selective profile provided in an inner diameter of the target packer and wherein each of the one or more packers have different selective profiles;
- an orientation sub having at least one collapsible key engageable with the 360.degree. helical slot of the target packer and at least one profiled collapsible dog complementary to and engageable with only the selective profile of the target packer;
- a guide stock attached to said orientation sub and having a diverter, adjustable relative to said orientation sub.
A diverter system for intervention of a lateral borehole comprising:
- a packer, of one or more packers, having a helical slot and a selective profile provided in an inner diameter of the packer;
- an orientation sub having at least one collapsible key engageable with the helical slot of the packer and at least one profiled collapsible dog engageable with the selective profile of the packer;
- a guide stock attached to said orientation sub and having a diverter, adjustable relative to said orientation sub
- a centralization sub having a body section and a set of arms articulated at one end to the body section and free at the other end thereof, said body section further having an angled portion angled sufficiently to facilitate driving said free ends of said arms outwardly upon shortening of the guide stock.
A method for reentering a lateral borehole comprising:
- running a reentry tool having at least one collapsible key engageable with a 360.degree. helical slot in one or more packers in a borehole and at least one collapsible dog complementary to and engageable with only one of the one or more packers via a distinct selective profile in each said one or more packers;
- orienting said reentry tool by following said slot with said key and engaging said specific profile with said at least one dog;
- and
- running a second tool into contact with a diverter of said reentry tool thereby deflecting said second tool into said lateral borehole.
Dependencies are inferred from the claim text.