An electronic single-shot well bore logger manufactured by Reflex Instrument has been successfully tested in the US by a leading drilling contractor. The instru-ment was used by the drilling company in a comparison with its existing instrumentation and was found to offer significant advantages. As a result, Reflex Instrument has started production of the new well bore logger, which it is confident will prove popular among drilling contractors offshore.
The instrument is suitable for smaller drill holes and can work without running gear or a pressure barrel. It can obtain six different hole parameters using accelerometers and a flux-gate magnetometer to obtain data on azimuth, inclination, and roll angle relative to magnetic north or gravity, magnetic dip angle, time, date, and temperature. The instrument is also able to make five single-shot surveys in a row.
For oil industry applications, the instrument will be protected with a combined heat shield and pressure barrel. The instrument itself withstands a pressure of at least 6,000 psi and with a pressure barrel, 20,000 psi. The temperature range with a heat shield is 350° F over eight hours.
Data recovered by the instrument can be transferred to a hand-held computer by an infra-red link. This can be subsequently downloaded onto a PC loaded with a Reflex Instrument's software package. The Windows-based software makes it possible for drilling contractors to create 3D representations of drill bore direction and to obtain a clearer awareness of its configuration.
Reflex Instrument has also recently introduced a new Electronic Multi Shot instrument that is particularly suitable for geological surveys and is aimed for use within the mining, exploration, and construction industries. With an outside diameter of 35 mm and an overall length of 1.76 m, this instrument can record data from up to 16,000 survey points. It uses accelerometers and a flux gate magnetometer to provide precise data on well bore direction and dip, roll angle, time, and temperature. This also makes it is suitable for use in smaller drill holes, and it does not require the additional use of running gear or a pressure barrel.
In addition to providing XYZ coordinates for drill hole data, the new instrument can also record temperature inside the hole. The magnetometer within the instrument can be used to provide data indicating the dip and direction of magnetic fields.
For more information, contact Yngve Lennerstrand, Reflex Instrument. Tel: +46 8511 80610, fax: +46 8511 80620, email: firstname.lastname@example.org, website: www.reflex.se.