초록 ▼

A well pipe string joint locator for attachment to the end of a length of coiled tubing and moved within the pipe string as the coiled tubing is lowered or raised therein is provided as well as methods of using the joint locator. The joint locator is comprised of an elongated tubular housing having

A well pipe string joint locator for attachment to the end of a length of coiled tubing and moved within the pipe string as the coiled tubing is lowered or raised therein is provided as well as methods of using the joint locator. The joint locator is comprised of an elongated tubular housing having a longitudinal fluid flow passageway therethrough and having at least one lateral port extending through a side thereof. Electronic means are disposed within the housing for detecting the increased mass of a pipe joint as said locator is moved through the joint and generating a momentary electric output signal in response thereto. Valve means are disposed within the housing responsive to the electric signal for momentarily opening or closing the lateral port of the housing to thereby create a surface detectible pressure drop or rise.

대표청구항 ▼

A method of accurately determining the depth of subterranean pipe string joints while lowering or raising coiled tubing within said pipe string and flowing fluid through said coiled tubing comprising the steps of: connecting a pipe string joint locator to the end of said coiled tubing prior to injec

A method of accurately determining the depth of subterranean pipe string joints while lowering or raising coiled tubing within said pipe string and flowing fluid through said coiled tubing comprising the steps of: connecting a pipe string joint locator to the end of said coiled tubing prior to injecting said coiled tubing into said pipe string, said joint locator having a fluid flow passageway therethrough and at least one valved lateral port therein communicated with said passageway and said joint locator momentarily opening or closing said valved lateral port each time it moves through a pipe joint; injecting said coiled tubing having said joint locator connected thereto into said pipe string and moving said coiled tubing and said joint locator through said pipe string while flowing fluid through said coiled tubing and said joint locator whereby said valved lateral port of said joint locator momentarily opens or closes each time said joint locator passes through a pipe joint thereby creating a surface detectible pressure drop or rise in the flowing fluid indicative of the location of said pipe joint; continuously measuring the depth of said joint locator and the surface pressure of said flowing fluid; and recording the measured depth of said joint locator corresponding to each detected pressure drop or rise in the flowing fluid to thereby accurately determine the measured depth of each detected pipe joint.