Work Item
ASTM WK76664

New Specification for Fluoropolymer-Based Materials for Use for Encapsulation of Downhole Cable

1. Scope

The development of test methods, practices, definitions, and specifications and the promotion of knowledge and research relating to solid and solidifying fluid electrical insulating materials.
The principal materials included are grades designed primarily for electrical insulating or dielectric purposes of the following: varnishes and resins; reinforced, laminated, filled and unfilled thermoplastic and thermosetting plastics; metal-clad dielectrics; ceramics, glass, and mica; embedment resins, compounds, and waxes; coated, extruded, cast, and calendared sheet, tape, and tubing; organic and inorganic papers, coated and uncoated; plastic, resin, paper, fiber, thermoset, rubber and ceramic insulation for wire; thermoplastic and thermosetting insulation, jacket, and semi- conducting materials for insulated wire and cable.
Within the scope are standards for the evaluation of all electrical, mechanical, chemical, and thermal properties needed to define these materials, either alone or in simple combinations representative of the way these materials are combined in use; and of the effects upon the properties of these materials, or combinations, of operating environments including the presence of heat, thermal shock, vibration, outer space conditions, and ionizing radiation.
Electrical Test Methods may include procedures for measurement at direct voltage and at all frequencies, including optical frequencies.
Standards for Insulated Conductors, including Fiber Optics, are within the scope insofar as these standards evaluate properties of the electrical insulation and jacket materials.
This scope does not include materials that are fluid in normal use except of their use as controlled ambients or impregnants for testing purposes.
Work in overlapping areas will be coordinated with other interested committees.


downhole cable, encapsulation, fluoropolymers, oil or gas production, thermoplastics, wire and cable


This draft standard is proposed to be developed for end-users (purchasers) and suppliers (manufacturers) of downhole polymer encapsulations that are intended for use in the petroleum and natural gas industry worldwide for use in wells. This draft specification is intended to provide requirements regarding qualification testing performed on the encapsulation polymers to validate their use as encapsulation material on various types of downhole cables used for oil or gas production. Such cables are typically manufactured from fluoropolymer materials. Users of this specification should be aware that additional requirements above those outlined in the draft standard may be needed for individual applications. This draft specification is not intended to inhibit a supplier/manufacturer from offering, or a user/purchaser from accepting, alternative equipment or engineering solutions. The properties contained in this specification are considered to be those most important for adequate performance by materials to be used as encapsulation materials.

The title and scope are in draft form and are under development within this ASTM Committee.


Developed by Subcommittee: D09.07

Committee: D09

Staff Manager: Alyson Fick

Work Item Status

Date Initiated: 04-23-2021

Technical Contact: Marcelo Hirschler

Item: 000