Oilfield D2 Shifting Slickline Fishing Tools STD H2S Service
D-2 Shifting Tool Wireline Running Tool
I. Introduction
The “D-2” shifting tool is designed to shift Baker style “L” sliding sleeves.
Made up of several components, the main parts of the “D-2” shifting tool are:
Fishneck
Mandrel
Collet
Connecting Adjuster
Control Sleeve
Nut
Spring
Retractor
Retaining Sleeve
Dog
Dog Retainer
Dog Spring
Key
Thread Protector
Collets come in different OD measurements, each sleeve ID will require a corresponding collet with a larger OD.
The purpose of the collet is to locate the sleeve desired to be shifted, the tool can then be extended allowing the spring loaded dogs to move outward latching the inner sleeve for shifting.
The collet design allows locating and shifting any desired sleeve in a completion with two or more sleeves.
The selective collet feature includes both the opening and closing “L” sleeves.
The tool requires a specific distance from the square face of the shifting dog to the collet locating profile. This measurement is done with the tool in the retracted position and allows for the shifting tool to disengage the sleeve when the shifting sequence is complete.
Although the shifting tool can be deliberately released three steel shear pins are incorporated at the base of the shifting dogs allowing for a safety release feature.
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