Hostile Environment Application Tool
The Hostile Environment Application Tool (HEAT) system produces accurate logs in high temperature, high pressure wells where conventional tools malfunction and fail. Advanced electronic and mechanical tool designs enable the HEAT suit to operate reliably in fierce downhole environments of 500℉ and 25,000psi. Furthermore, the 2-3/4-inch OD toolstring operates in boreholes too small to accommodate conventional tools and gives quality data with no compromises in accuracy.
Gamma Ray
Gross gamma ray counts from an efficient scintillation detector.
Dual Spaced Neutron
Porosity from ratio of near and far detector count rates. The dual thermal neutron detectors are optimized to minimize temperature effects.
Compensated Density
Compensated bulk density along with short-spaced, long-spaced, and compensated Pe. The tool's dual scintillation detectors utilize spectral data processing, and its all tungsten pad body reduces borehole effects. Available with the source-detector pad in either a inline configuration (2.75-inch tool OD) or a powered, extendible configuration (3.5 inch tool OD).
Full Wave Sonic
Long-spaced Dt from the tool's two transmitters and six receivers (near-transmitter to receiver offsets of 3,5,8,8.5,9 and 9.5 feet), with improved long-spaced borehole compensation. Compressive and shear measurements. Programmable filters facilitate tailoring frequency response for special applications. Build in simulator for downhole tool diagnostics
Dual Laterolog
Deep and medium readings of formation resistivity, plus SP.
Dual Induction
Deep and medium readings, 16-inch short normal resistivity and SP.
Four- Arm Caliper
Dual borehole diameters, average borehole diameter, borehole volume, and annular volume. Caliper arms are independently articulated.
Powered Decentralizer
Aids in decentralizing Dual Spaced Neutron and Compensated Density assemblies for better measurements. Main decentralizing arm provides borehole caliper measurement.
Diametrically opposed secondary arm provides indications of rugosity and washouts and produces a standoff measurement for correcting the neutron porosity.

Pipe Recovery Services
General information
The Free Pipe Indicator (FPI) tool is part of a system used for recovering the free portion of a string that is stuck in a borehole. The primary function of the tool is to find the free point; i.e., the downhole location where the string is no longer stuck and therefore free to move. A direct-reading digital counter is utilized as a surface indicator of the percent of freeness.
After the free point has been found, the FPI system can be used to separate the free portion of the string from the stuck portion. One procedure is string shot-back off. If this procedure proves to be unsuccessful or impractical, jet or chemical cutters can be lowered into the pipe string to sever the pipe.
Portable Free point System
Surface readouts of free point tool measurements are provided by a free point indicator panel. This portable panel and free point equipment may be used with any electric wireline and hoist unit to run free point, strong shot, or cutter services. Safety is assured through direct communication with the rig floor and a three-stage firing circuit to arm and detonate the back off or cutter devices.
Applications

String Shot – Back Off
Service Description
This wireline-conveyed pipe recovery tool uses a precise quantity of explosive detonating cord to produce shock waves.
The string shot-back off Processing involves applying left-hand torque to the pipe string at the neutral pipe weight (in neither tension nor compression). The string shot is then positioned at the predetermined tool joint and detonated. The explosion produces much the same effect as an intense hammer blow and allows the joint to be unscrewed at the proper connection. The string shot-back off method has been improved through years of research and experience to increase operating efficiency without damaging the pipe string.
In order to make up a proper string shot, certain factors must be determined:
   • Pipe size, weight, and condition;
   • Depth of back off;
   • Borehole fluid type and weight;
   • Well temperature.
Factors 1, 2, and 3 are needed to determine the size of the string shot and factors 3 and 4 are needed for the selection of the proper fuses and detonating cord. A string shot can be constructed that will readily run through an ID as small as .75 in. (19.1 mm). It can also be run in the annulus to back off the pipe from the outside.
Applications