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I. Introduction  

A wireline spring centralizer is designed to assist in centralizing the tool string inside large bore tubing. Normally used in the tool string when running pressure and temperature gauges, it helps centralize and reduce shock being transmitted to the gauges. The design of this kind of centralizer enables one tool to centralize a large range of tubing ID.

II. General Technical Parameters

Size	Fishing neck	Connection	Strutting OD.	PN.
1.5"	1.375"	15/16-10UN	2"-4"	W09-01.**.00
1.875"	1.75"	1-1/16-10UN	2"-4-1/2"	W09-01.**.00
2.125"	1.75"	1-1/16-10UN	2-1/4"-4-3/4"	W09-01.**.00
2.5"	2.313"	1-9/16-10UN	2-3/4"-5"	W09-01.**.00

Note: More customized parts are available upon request.  

III.Structural Features 

The wireline spring centralizer is composed of upper contact, mandrel, centering sleeve, spring piece, lower contact, etc.

Install the centering sleeve on the mandrel, connect the top end and bottom end of mandrel with upper contact and lower contact respectively, and fix the spring piece on the centering sleeve. The spring is released in free state. Adjust the releasing length of spring piece through adjusting the position of centering sleeve on the mandrel