Wireless telemetry systems for downhole tools

a technology of telemetry system and downhole tool, which is applied in the field of telemetry system, can solve the problems of difficult to provide such communication using a cable, the cable inside the tubing is also an additional complexity, and the operator does not obtain direct feedback from the downhole tool

Inactive Publication Date: 2011-08-25
SCHLUMBERGER TECH CORP
View PDF40 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]A first aspect of this invention provides apparatus for transmitting data in a borehole between a downhole installation including one or more tools (for example downhole testing tools) and ...

Problems solved by technology

One of the more difficult problems associated with any borehole is to communicate measured data between one or more locations down a borehole and the surface, or between downhole locations themselves.
Similarly when operating some of the downhole testing tools from surface, such as tester valves, circulating valves, packer, samplers or perforating charges, the operators do not obtain a direct feedback from the down...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wireless telemetry systems for downhole tools
  • Wireless telemetry systems for downhole tools
  • Wireless telemetry systems for downhole tools

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038]The present invention is particularly applicable to testing installations such as are used in oil and gas wells or the like. FIG. 1 shows a schematic view of such a system. Once the well has been drilled through a formation, the drill string can be used to perform tests, and determine various properties of the formation though which the well has been drilled. In the example of FIG. 1, the well 10 has been lined with a steel casing 12 (cased hole) in the conventional manner, although similar systems can be used in unlined (open hole) environments. In order to test the formations, it is preferable to place testing apparatus in the well close to the regions to be tested, to be able to isolate sections or intervals of the well, and to convey fluids from the regions of interest to the surface. This is commonly done using a jointed tubular drill pipe, drill string, production tubing, or the like (collectively, tubing 14) which extends from the well-head equipment 16 at the surface (...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Apparatus and method for transmitting data in a borehole (10) between a downhole installation including one or more tools (20) (for example downhole testing tools) and a surface installation (62), wherein the downhole installation is connected to the surface installation by means of a tubular conduit (such as a drill string or production tubing 14)). The apparatus comprises: an acoustic modem (26) associated with each tool, the modem acting to convert tool signals such as electrical tool signals into acoustic signals; and a hub (90) forming part of the downhole installation to which the tools and tubular conduit are connected and comprising an acoustic receiver (74) and an electromagnetic transmitter (80). The acoustic modems operate to generate acoustic signals in the downhole installation representative of the tool signals, the acoustic signals passing along the downhole installation to be received at the acoustic receiver of the hub, the received acoustic signals being used to operate the electromagnetic transmitter to transmit electromagnetic signals to the surface for reception at the surface installation.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001]The present application is based on and claims priority to European Patent Application No. EP08162854, filed Aug. 22, 2008.TECHNICAL FIELD [0002]The present invention relates to telemetry systems for use with installations in oil and gas wells or the like. In particular, the present invention relates to wireless telemetry systems for transmitting data and control signals between a location down a borehole and the surface, or between downhole locations themselves.BACKGROUND ART [0003]One of the more difficult problems associated with any borehole is to communicate measured data between one or more locations down a borehole and the surface, or between downhole locations themselves. For example, in the oil and gas industry it is desirable to communicate data generated downhole to the surface during operations such as drilling, perforating, fracturing, and drill stem or well testing; and during production operations such as reservoir evaluati...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21B47/16E21B47/12
CPCE21B47/16E21B47/122E21B47/13
Inventor LEMENAGER, ERWANN
Owner SCHLUMBERGER TECH CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap