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Technical Memorandum 005-3 - Camera Port: A Primer on Design, Manufacture and Installation
Technical Memorandum 005-3 - Camera Port: A Primer on Design, Manufacture and Installation Imprimir

 

Introduction

A camera port or box is an optional design feature of a water well that provides access to the nterior of the well at a depth below the pump bowls. With a camera port permanently attached to the exterior of the casing, a downhole camera can be lowered into the well to inspect the condition of the casing and screen without having to remove the pump bowls, pump column, and wellhead appurtenances. Periodic inspections of the well can be made at any time without having to discontinue pumping operations or incur the cost to pull and reinstall the pump. The camera port can also be used to lower a spinner tool into the well to conduct a flow meter survey while the pump is running.

 

The design, manufacture, and installation of a camera port require careful attention and proper analysis. This memorandum is intended to introduce the design concept, use, and utility of a camera port in sufficient detail to provide a primer on the subject. A detailed discussion of the design, manufacturing process, and construction methods of a camera port is beyond the scope of this technical memorandum.

Downhole Logging Tools Video Cameras. Water wells require periodic inspection to assess the condition of the well casing and screen. Most often, this accomplished by lowering a small diameter (e.g., 1.75 to 2-inch O.D.) camera into the well. There are various cameras available. The typical camera consists of a stainless steel housing, on-board light source, and color video camera with the ability to scan sideways in a 360-degree panning view. The length of the camera varies with the model and can range from 2 to 8 feet. The camera is connected to a cable that is attached to a truck-mounted winch. A viewing monitor located in the service truck or van provides real-time video that is recorded for playback.

Flowmeters. The spinner flowmeter is a tool that is lowered into the well to record the flow of water into the well through the well screen. Flowmeter tools are comparable in diameter to video cameras and are about 4 to 5 feet in length. The tool records the revolutions of an internal impeller and then transmits electronic data back to a receiver in the service truck or van through a winch-mounted cable. Digitized data are formatted and printed out to show the movement of water into the well at various depths within the screened sections.

Camera Port Description

The Roscoe Moss Company (RMC) has designed and manufactures on request a camera port and camera tube connection (Figure 1) that can be attached to mild steel, copperbearing steel, high-strength low-alloy steel, and stainless steel casing. Camera ports can be manufactured in

ENVIADO POR RAÚL CAMPILLO U., HIDROGEÓLOGO

 

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