Perforation blocking sleeve for well restimulation

Patent metadata

Field	Value
Publication number	US-2018112489-A1
Application number	US-201615358609-A
Country	US
Kind code	A1
Filing date	Nov 22, 2016
Priority date	Oct 24, 2016
Publication date	Apr 26, 2018
Grant date	—

Abstract

A perforation blocking sleeve is provided for use in well restimulation, the perforation blocking sleeve having a first anchoring device and one or more expandable members secured to an outer surface of the perforation blocking sleeve. The first anchoring device may be used to secure the perforation blocking sleeve over a perforation cluster within a perforated well casing. The perforation blocking sleeve defines a flow channel and may be remotely and individually uncoupled from a running tool. The perforation blocking sleeve flow channel is sized such that the running tool and a running tool driver are retractable through the flow channel of the perforation blocking sleeve. In one or more embodiments, the perforation blocking sleeve contains an organic polymeric material which expands on contact with a production fluid or an exogenous fluid introduced into the well.

First claim

What is claimed is:

1 . A perforation blocking sleeve for use in well restimulation comprising:
(a) a first anchoring device; and (b) one or more expandable members secured to an outer surface of the perforation blocking sleeve; wherein the first anchoring device may be used to secure the perforation blocking sleeve over a perforation cluster within a perforated well casing, the perforation blocking sleeve defining a flow channel; wherein the perforation blocking sleeve may be remotely and individually uncoupled from a running tool; and wherein the running tool and a running tool driver are retractable through the flow channel of the perforation blocking sleeve.

2 . The perforation blocking sleeve according to claim 1 , wherein the first anchoring device is integral to a tapered end of the perforation blocking sleeve and comprises a plurality of cantilevered springs defining an end portion for engaging with a detention arm assembly.

3 . The perforation blocking sleeve according to claim 2 , wherein the cantilevered springs define one or more slips on the outer surface of the perforation blocking sleeve.

4 . The perforation blocking sleeve according to claim 2 , wherein the detention arm assembly is a component of the running tool.

5 . The perforation blocking sleeve according to claim 2 , wherein the detention arm assembly is integral to the perforation blocking sleeve.

6 . The perforation blocking sleeve according to claim 1 , wherein the expandable member is comprised of a material comprising an organic polymer susceptible to expansion by contact with either or both of an exogenous fluid and a production fluid within the perforated well casing.

7 . The perforation blocking sleeve according to claim 6 , wherein the production fluid is water and the expandable member comprises a superabsorbent material.

8 . The perforation blocking sleeve according to claim 1 , wherein the perforation blocking sleeve may be reversibly coupled to the running tool via one or more detention arms.

9 . The perforation blocking sleeve according to claim 1 , wherein the running tool driver is a tractor coupled to the running tool.

10 . The perforation blocking sleeve according to claim 1 , wherein the running tool driver is a jointless pipe coupled to the running tool.

11 . The perforation blocking sleeve according to claim 1 , further comprising one or more sensors configured to detect a perforation cluster.

12 . The perforation blocking sleeve according to claim 11 , comprising at least one sensor selected from the group consisting of casing collar locators, fiber optic sensors, camera sensors and acoustic sensors.

13 . The perforation blocking sleeve according to claim 1 , wherein the expandable member comprises a shape-memory organic polymer which expands when its glass transition temperature is exceeded.

14 . The perforation blocking sleeve according to claim 13 , wherein the expandable member further comprises one or more attachment devices for further inhibiting movement of the perforation blocking sleeve once detached from the running tool.

15 . The perforation blocking sleeve according to claim 14 , wherein said attachment devices are selected from the group consisting of buttons and slips.

16 . A perforation blocking sleeve for use in well restimulation comprising:
(a) a pair of first anchoring devices integral to opposite, tapered ends of the perforation blocking sleeve and comprising a plurality of cantilevered springs defining an end portion for engaging with a detention arm assembly; and (b) one or more expandable collars secured to an outer surface of the perforation blocking sleeve, the expandable collars comprising an organic polymer susceptible to expansion by contact with either or both of an exogenous fluid and a production fluid within the perforated well casing; and wherein the pair of first anchoring devices may be used to secure each perforation blocking sleeve over a perforation cluster within a perforated well casing, the perforation blocking sleeve defining a flow channel; wherein the perforation blocking sleeve may be remotely and individually uncoupled from a running tool; and wherein the running tool and a running tool driver are retractable through the flow channel of the perforation blocking sleeve.

17 . The perforation blocking sleeve according to claim 16 , wherein the expandable collar further comprises a shape-memory organic polymer which expands when its glass transition temperature is exceeded.

18 . The perforation blocking sleeve according to claim 16 , wherein the cantilevered springs define one or more slips on the outer surface of the perforation blocking sleeve.

19 . The perforation blocking sleeve according to claim 16 , further comprising one or more sensors configured to detect a perforation cluster.

20 . A perforation blocking sleeve for use in well restimulation comprising:
(a) a pair of first anchoring devices integral to opposite, tapered ends of the perforation blocking sleeve and comprising a plurality of cantilevered springs defining an end portion for engaging with a detention arm assembly; (b) one or more expandable members secured to an outer surface of the perforation blocking sleeve; and (c) one or more sensors configured to detect a perforation cluster; wherein the first anchoring devices may be used to secure each perforation blocking sleeve over a perforation cluster within a perforated well casing, each perforation blocking sleeve defining a flow channel; wherein the perforation blocking sleeve may be remotely and individually uncoupled from a running tool; and wherein the running tool and a running tool driver are retractable through the flow channel of the perforation blocking sleeve.

Assignees

• Gen Electric

Inventors

• Potts Jeffrey Robert
• Parkey Jr Dewey Lavonne
• George Matthew Landon

Classifications

• E21B23/01

  for anchoring the tools or the like (E21B23/02 - E21B23/06 take precedence; anchoring of drives in the borehole E21B4/18) · CPC title

• E21B33/129 Primary

  with mechanical slips for hooking into the casing (E21B33/122, E21B33/124 take precedence) · CPC title

• E21B23/001

  Self-propelling systems or apparatus, e.g. for moving tools within the horizontal portion of a borehole · CPC title

• E21B33/1293

  with means for anchoring against downward and upward movement (E21B33/1291, E21B33/1295 take precedence) · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title