Schlumberger Technology Corporation

Gary D Hurst

Raymond J Tibbles

Colin J Price-Smith

David R Mandeville

Ian J Mickelburgh

Mehmet Parlar

Jake A Danos

Graham Watson

H Steven Bissonnette

Geoffrey R Kernick

Juliet Lorde

Alan Monsegue

The completion assembly includes a conveyance device to bypass regions within a wellbore that may disrupt the desired distribution of gravel in a gravel pack. A packer is attached to an upper tubular, and generally run into wellbore until properly positioned and set near the lower end of upper section. Packer has an extension/crossover to which other lower completion equipment such as a conveyance device and a screen can attach. Conveyance device 22 may include an inner tubular within an outer tubular forming an annular flow path between the inner and outer tubulars. Conveyance device may include one or more discreet flow tubes placed around a lower tubular.

Conveyance device and method of use in gravel pack operations

The present invention provides for a conveyance device to bypass regions within a wellbore that may disrupt the desired distribution of gravel in a gravel pack.

Conveyance device and method of use in gravel pack operation

Multiple pathways are provided by which fluid can enter one or more alternate pathway conduits. Entrance tubes can be arranged such that their spacing prevents all of them from being simultaneously obstructed, covered, or otherwise blocked.

Multiple entrance shunt

Methods and apparatus provide for the characterization of injected fluid flow within a wellbore. Particular embodiments include injecting a slurry comprising a particulate material and a carrier fluid into an isolated wellbore annulus and acquiring composite density readings at one or more discrete locations along the annulus while depositing the particulate material. Interpreting the acquired composite density readings provides an evaluation of the placement of the deposited particulate material within the isolated wellbore annulus. A further step may include determining when the slurry reaches each of the discrete locations as indicated by increases in the composite density reading at each of the discrete locations and furthermore, acquiring a maximum composite density reading at each of the discrete locations along the tubular member as an indication of the quantity of deposited particulate material at each of the discrete locations. Apparatus includes a plurality of densimeters secured at discrete axial locations within a tubular member for acquiring composite density readings within an isolated wellbore annulus.

Determining and tracking downhole particulate deposition

The present invention provides for multiple pathways by which fluid can enter one or more alternate pathway conduits. Entrance tubes can be arranged such that their spacing prevents all of them from being simultaneously obstructed, covered, or otherwise blocked.

The present invention provides a method for gravel packing a open-hole wellbore having a filter cake, comprising pumping a gravel slurry into a first portion of an annulus between the wellbore and a screen, at a sufficient rate and pressure to form at least a first fracture and diverting the gravel slurry to a second portion of said annulus through alternate flowpaths while providing hydraulic isolation between the first and the second portion of said interval, thereby preventing flowback from said second portion to said first portion and resulting extension of the first fracture, and thereby forming a second fracture in said second portion of said interval.

Method and gravel packing open holes above fracturing pressure

This invention includes an apparatus and method for completing a subterranean zone penetrated by a wellbore. One embodiment of the invention is an apparatus for connecting a first sand screen assembly and a second sand screen assembly. The apparatus comprises a tubular housing having an eccentric longitudinal bore therethrough, providing a first fluid communication path through the apparatus, the longitudinal bore defining a housing wall. A longitudinal passageway is disposed within the housing wall, providing a second fluid communication path through the apparatus. The first fluid communication path is capable of communicating fluid flow from a sand screen in the first sand screen assembly to a sand screen in the second sand screen assembly. The second fluid communication path is capable of communicating fluid flow from an alternate path element in the first sand screen assembly an alternate path element in the second sand screen assembly.

Apparatus and method for alternate path system

This invention provides improved apparatus and methods for completing a subterranean zone penetrated by a wellbore utilizing a gravel pack operation. One embodiment of the invention is an apparatus for completing a subterranean zone penetrated by a wellbore comprising a tubular member having a wall and a longitudinal bore. A plurality of apertures extend through the tubular member wall, the apertures define at least one radial arc and create at least one perforated radial aperture zone and at least one non-perforated radial blank zone. A screen member is attached to the exterior of the tubular member that covers the apertures. The placement of the apparatus within the wellbore creates an annular flow region that has a reduced tendency for premature dehydration of slurry during a gravel pack completion operation.

Apparatus and methods for gravel pack completions

The present invention discloses apparatus and methods for use in wellbores that comprise an inflatable element. The inflatable element is adapted for inflation by gravel. One embodiment of the invention is a method of sealing an annulus in a well that comprises expanding the inflatable element with a gravel laden slurry. The inflatable element comprises a passageway communicating between an exterior and an interior of the inflatable element. The inflatable element is capable of being connected to a sand screen and the inflatable element can be inflated with the gravel laden slurry during a gravel packing of the well.

Gravel inflated isolation packer

Apparatus and methods for use in completing a subterranean zone penetrated by a wellbore include a tubular member having a first segment and a second segment, each segment containing a longitudinal bore. The tubular member forms an annulus between itself and the wellbore wall. At least one screen member at least partially encloses and is coupled to a second segment of the tubular member. The screen member and the enclosed second segment of the tubular member both have openings that allow fluid communication between the longitudinal bore of the tubular member and the wellbore. The apparatus includes an alternate flowpath member having a wall, upper and lower ends, and at least one aperture in its wall. The apertures are small enough to substantially prevent passage of particulate material. The alternate flowpath member extends longitudinally along a portion of the wellbore and creates a communication path for fluid flow.

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Hastings, OK, United States of America

Gary D Hurst