Halliburton Energy Services, Inc.

Michael John Levchak

Alexei Korovin

Kazi M Rashid

Anand Prakash

James Howell Cobb

Stephen Woolverton

This disclosure may generally relate to systems and methods to compensate for changes in environmental conditions, such as temperature and pressure, that may be experienced by downhole tools. A downhole tool may include a tool body; a protective sleeve disposed around the tool body, wherein an annulus is formed between the protective sleeve and the tool body; a sensor coupled to the tool body; and an environmental compensation system, wherein the environmental compensation system comprises a bladder, and wherein an interior of the bladder is in fluid communication with the annulus.

Environmental compensation system for downhole oilwell tools

A wearable sleeve to protect a sensor coupled to an object. The wearable sleeve having an axial axis, a longitudinal axis substantially perpendicular to the axial axis, a first wearable sleeve end and a second wearable sleeve end opposite the first wearable sleeve end. A first ring coupled to the first end of the first wearable sleeve end and a second ring coupled to the second wearable sleeve end. The first ring and the second ring have the same expansion properties as the object.

Wear sleeve

An antenna assembly that includes a bobbin including arcuate first and second bobbin portions positioned about a tool mandrel. A protective layer is formed about the first and second bobbin portions, and a cover occludes a portion of an axially extending gap defined between the first and second bobbin portions to prevent the protective layer from extruding into the gap.

Antenna designs for wellbore logging tools

Mechanisms for induction-based resistivity measurements can be provided for use in geo-steering in a drilling operations environment. An antenna assembly can provide effective protection for antenna sections without hindering propagation of electromagnetic signals. The antenna assembly can include a bobbin disposed about a collar of a tool string; an antenna disposed on an outer surface of the bobbin; an outer adhesive layer covering the antenna and at least a portion of the bobbin; and a protective layer disposed against the outer adhesive layer; wherein the outer adhesive layer fills a space radially between the bobbin and the protective layer.

Buildup and encapsulation of antenna section of downhole tool

A collar-mountable antenna for transmitting and receiving signals in a downhole environment, in at least some embodiments, comprises a bobbin having an inner surface and an outer surface, each of the inner and outer surfaces defining multiple slots, conductive wire disposed within the multiple slots on the outer surface of the bobbin, and ferrite disposed within the multiple slots on the inner surface of the bobbin.

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Tomball, TX, United States of America

Michael John Levchak