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Multi-zone frac-packing using screen-conveyed linear charges

a linear charge and frac-packing technology, applied in the direction of explosive charges, fluid removal, borehole/well accessories, etc., can solve the problem of increasing the loss of fluid in the well

Inactive Publication Date: 2007-11-08
SCHLUMBERGER TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fluid loss in the well increases with the number of downhole trips, because fluid loss invades the formation and may have detrimental effects on the well.

Method used

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  • Multi-zone frac-packing using screen-conveyed linear charges
  • Multi-zone frac-packing using screen-conveyed linear charges
  • Multi-zone frac-packing using screen-conveyed linear charges

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Embodiment Construction

[0020] It will be appreciated that the present invention may take many forms and embodiments. In the following description, some embodiments of the invention are described and numerous details are set forth to provide an understanding of the present invention. Those skilled in the art will appreciate, however, that the present invention may be practiced without those details and that numerous variations and modifications from the described embodiments may be possible. The following description is thus intended to illustrate and not to limit the present invention.

[0021] With reference first to FIG. 1, an exemplary embodiment of a bottom hole assembly (BHA) 45 in accordance with the present invention is illustrated. BHA 45 comprises a screen and perforating charge assembly 14 and a service tool 40. BHA 45 is lowered into wellbore 10 utilizing a tubular string (not shown in FIG. 1) that extends from the surface and is stabbed into the sump packer 32. As illustrated in FIG. 1, the well...

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PUM

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Abstract

An assembly is disclosed which is usable with the well which comprises a base pipe having a plurality of apertures where each of the apertures contains a screen insert. The assembly also includes a plurality of perforating charges which are mounted to the outer surface of the base pipe in proximity to the screen inserts. In one embodiment, the perforating charges are conical shaped charges, while in another embodiment, the perforating charges are linear shaped charges. An assembly according to the present invention may be utilized to perforate and gravel pack one or more of downhole zones in a single trip downhole. Utilization of linear perforating charges avoids killing the well and prevents formation damage by kill-pills or kill-fluids. An assembly in accordance with the present invention thus reduces drilling time and costs and allows for total flexibility for the distance between stacked intervals.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a continuation of application Ser No. 11 / 380,755, filed Apr. 28, 2006.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention generally relates to a completion system for a wellbore, and, more particularly, to a sand-face completion for the wellbore. [0004] 2. Description of the Prior Art [0005] In order to perforate and gravel pack a wellbore, several downhole trips or runs, typically are required. For example, a lower zone is plugged, then perforated, and the perforating guns are recovered. Then a cleanup string is then tripped in the hole, and recovers the plug. Thereafter, a string that contains a bottom-hole assembly is run into the well, and the bottom-hole assembly typically includes the sand screen to support a filter gravel substrate that is deposited around the sand screen in a subsequent gravel packing operation. The portion of the string above the bottom-hole assembly, whi...

Claims

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Application Information

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IPC IPC(8): E21B43/116
CPCE21B43/045E21B43/117E21B43/08
Inventor CECCARELLI, TOMASOWHITSITT, JOHNHENDERSON, STEVEN
Owner SCHLUMBERGER TECH CORP