Flow through treatment string for one trip multilateral treatment

Patent metadata

Field	Value
Publication number	US-10508519-B2
Application number	US-201615334925-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Oct 26, 2016
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

An adjustable tubular string nose uses axially relatively movable wedge segments to form a variable diameter ring shape using technology described in U.S. Pat. No. 7,128,146 in another context. The nose has a seat around a passage therethrough. After insertion of the nose into a first bore, typically a main bore, the nose is retracted out of the main bore and pressure against a seated bore in the nose expands the nose radially to a degree where re-entry into the main bore is precluded but entry into a lateral bore is still possible. The string advances onto a lateral no-go. This signals surface personnel to pick up and raise pressure to blow the seated ball through the seat to again open the passage in the nose. A seal stack behind the nose in advanced into a lateral seal bore and the treatment can then commence.

First claim

We claim:

1. A one trip treating method for a first bore and at least one interconnected second bore through a diverter, comprising:
passing a nose assembly at a string leading end through a first diverter opening and into the first bore with said nose assembly in a smaller diameter configuration;
performing a first treatment through an open central axial passage defined within the nose assembly and an axial end opening in said nose assembly;
retracting said nose assembly through said first diverter opening;
providing an object on a seat in said passage of said nose assembly to change configuration of said nose assembly with pressure in said string, said object being a ball;
reconfiguring said nose assembly to a larger diameter configuration such that passage of said nose assembly through a second diverter opening in the second bore.

2. The method of claim 1 , wherein:
the step of providing the object on the seat temporarily closes said central axial passage for reconfiguring said nose assembly between said smaller and larger configurations.

3. The method of claim 1 , comprising:
providing seal bores in said first and second bores;
engaging said seal bores with a seal stack on said string.

4. The method of claim 1 , comprising:
moving a piston axially with said pressure;
axially shifting spaced segments of a ring shape with respect to other segments defining the ring shape to change the diameter of said ring shape.

5. The method of claim 4 , comprising:
overcoming a bias on said piston with said moving said piston.

6. The method of claim 1 , comprising:
forcing said object through said seat to reopen said passage in said nose assembly after placement of said nose assembly while in the larger configuration in the second bore.

7. The method of claim 1 , comprising:
contacting a first no-go in said second bore with said nose assembly when in the larger configuration;
opening said passage in said nose assembly after contacting said first no-go in said second bore;
reconfiguring said nose assembly to said smaller configuration before further advancing said nose assembly to a second no-go to place a seal stack on said string in a seal bore of said second bore.

8. The method of claim 7 , comprising:
pulling said nose assembly out of said second bore and to a surface location in said smaller configuration.

9. The method of claim 1 , comprising:
performing fracturing as said first treatment.

Assignees

• Baker Hughes A Ge Co Llc

Inventors

• Pendleton Bryan P
• Sheehan Joseph E
• Vu John
• Martin Shannon
• Mosley Deshuttaney
• Knebel Mark J

Classifications

• E21B23/12

  Tool diverters · CPC title

• E21B41/0035 Primary

  Apparatus or methods for multilateral well technology, e.g. for the completion of or workover on wells with one or more lateral branches · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title

• E21B23/002

  Fixed Constructions · mapped topic