Mechanical diverter

Patent metadata

Field	Value
Publication number	US-2016138370-A1
Application number	US-201414546656-A
Country	US
Kind code	A1
Filing date	Nov 18, 2014
Priority date	Nov 18, 2014
Publication date	May 19, 2016
Grant date	—

Abstract

An apparatus for performing a wellbore operation includes a retrievable tubular defining an axial flowbore and having at least one opening providing fluid communication between the flowbore and a formation, and a degradable diverter disposed at least partially in an annulus between a wellbore and the retrievable tubular, and adjacent to the at least one opening. The degradable diverter comprises a material that structurally degrades over an engineered time interval in response to an applied stimulus. The degradable diverter also directs a stimulation fluid exiting through the at least one opening towards the formation. The degradable diverter is connected to the retrievable tubular, a stimulation fluid is pumped through the flowbore. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the general subject matter of the technical disclosure.

First claim

We claim:

1 . An apparatus for performing a wellbore operation, comprising:
a retrievable tubular defining an axial flowbore and having at least one opening providing fluid communication between the flowbore and a formation; and a degradable diverter disposed at least partially in an annulus between a wellbore and the retrievable tubular, and adjacent to the at least one opening,
wherein the degradable diverter comprises a material that structurally degrades over an engineered time interval in response to an applied stimulus,
wherein the degradable diverter directs a stimulation fluid exiting through the at least one opening towards the formation.

2 . The apparatus of claim 1 , wherein the degradable diverter comprises at least one of: (i) ceramics, (ii) phenolics, (iii) metals, (iv) polyvinyl alcohols, (v) polyacrylamide, (vi) polyacrylic acids, (vii) rare earth elements, (viii) glasses, and (ix) carbon.

3 . The apparatus of claim 1 , wherein the degradable diverter has an axial cross section of at least one of: (i) a polygon, (ii) a concave shape, (iii) a convex shape, and (iv) defined at least partially by an arc.

4 . The apparatus of claim 1 , wherein the degradable diverter has an engineered gap with a surface surrounding the degradable diverter.

5 . The apparatus of claim 1 , wherein the degradable diverter comprises a swab cup.

6 . The apparatus of claim 1 , wherein the degradable diverter has an adjustable outer diameter, the outer diameter expanding from a first diameter during run-in to a second larger diameter during operation.

7 . The apparatus of claim 6 , wherein the degradable diverter comprises at least two mates, each mate having an inclined surface, wherein sliding engagement of the inclined surfaces expands the outer diameter of the degradable diverter.

8 . The apparatus of claim 6 , wherein the degradable diverter expands to the second diameter when actuated by at least one of: (i) hydraulic actuator, (ii) mechanical actuator, (iii) hydrostatic pressure, (iv) electrical trigger (v) electromagnetic signal, and (vi) acoustic signal.

9 . The apparatus of claim 1 , wherein the degradable diverter comprises a first and a second diverter element, the at least one opening being positioned between the first and the second diverter element.

10 . The apparatus of claim 1 , wherein the at least one opening includes a plurality of axially spaced apart openings, and further comprising a plurality of degradable diverters disposed along the retrievable tubular, wherein each degradable diverter diverts the stimulation fluid from an adjacent axially spaced apart opening to the formation.

11 . The apparatus of claim 10 , wherein at least two of the degradable diverters have at least one of: (i) a different axial cross section; and (ii) a different chemical composition.

12 . The apparatus of claim 10 , wherein at least two of the degradable diverters are configured to degrade in response to different applied stimuli.

13 . The apparatus of claim 1 , wherein the applied stimulus is one of: (i) temperature change (ii) the stimulation fluid, (iii) a wellbore fluid, and (iv) some other activation fluid applied for this purpose.

14 . The apparatus of claim 1 , wherein the retrievable tubular is a part of a hydraulic fracture completion system.

15 . The apparatus of claim 1 , wherein the material is a non-elastic material.

16 . A method for performing a wellbore operation, comprising:
connecting a degradable diverter to a retrievable tubular defining an axial flowbore and having at least one opening providing fluid communication between the flowbore and a formation,
wherein the degradable diverter is disposed at least partially in an annulus between a wellbore and the retrievable tubular, and adjacent to the at least one opening,
pumping a stimulation fluid through the flowbore;
allowing the stimulation fluid to exit through the at least one opening;
directing the stimulation fluid towards the formation using the degradable diverter; and
structurally degrading the degradable diverter over an engineered time interval using an applied stimulus.

17 . The method of claim 16 , further comprising connecting a plurality of degradable diverters to the retrievable tubular and degrading at least two of the plurality of the degradable diverters at different times.

18 . The method of claim 17 , wherein the at least two of the plurality of the degradable diverters are degraded using different fluid compositions.

19 . The method of claim 16 , further comprising retrieving the retrievable tubular.

20 . The method of claim 16 , wherein the retrievable tubular is part of a hydraulic fracture completion system.

Assignees

• Baker Hughes Inc

Inventors

• Flores Juan C
• Harper Jason M
• Sanchez James S

Classifications

• E21B43/25

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• E21B17/00

  Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; {Cables;} Casings; Tubings · CPC title

• E21B41/00 Primary

  Equipment or details not covered by groups E21B15/00 - E21B40/00 · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title

• E21B2200/08

  Down-hole devices using materials which decompose under well-bore conditions · CPC title