Apparatus relating to the linings of pipelines and passageways
AssigneeInsituform B.V.
InventorsEric Wood, deceased, Miranda J. Bull, executrix
Life of this patent
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Abstract
The invention provides that where a main underground pipeline or passageway (10) is lined by a lining tube which extends over the connection of a lateral pipe (12) with the main pipeline or passageway (10), the lateral connection can be readily located and the lining tube (44) cut to re-establish the connection, if such as a steel ball or other deposit, which is radiation detectable, is placed on the surface of the pipeline or passageway (10) at a predetermined distance (77) from the said lateral connection.
Claims13
A method of locating a lateral pipe which forms a connection with a main pipeline or passageway, wherein said main pipeline or passageway has been lined with a lining tube which extends over the connection of the lateral pipe and main pipeline or passageway, comprising
- depositing a radiation sensitive means on the main pipeline or passageway at a pre-determined distance from the edge of the lateral pipe prior to the lining operation,
- locating the edge of the lateral pipe and the main pipeline or passageway connection using a mechanical feeler to establish a datum, and positioning the radiation sensitive means at a pre-determined distance from the datum by a positioning member,
- inserting a locating means into the lined main pipeline or passageway after the main pipeline or passageway has been lined, said locating means having a sensor for sensing the location of the radiation sensitive means, and
- determining the location of the lateral pipe and the main pipeline or passageway connection from the location of the deposited radiation sensitive means.
An apparatus for facilitating the location of a lateral pipe which forms a connection with a main pipeline or passageway said main pipeline having been lined during a lining operation with a lining tube which extends over the lateral pipe and main pipeline or passageway connection, comprising
- means for depositing a radiation sensitive means on the main pipeline or passageway, before the lining operation, at a predetermined distance from the lateral pipe and main pipeline or passageway connection, said depositing means including a mechanical feeler with means for engaging the edge of the lateral pipe and main pipeline or passageway connection such that when the feeler has engaged the edge, a pad which is located a predetermined distance from the feeler is caused to deposit the radiation sensitive means.
Dependencies are inferred from the claim text.