Compass Software Drilling
Aiko Bartels
Rock properties, torque and drag, cost, and the location of existing wells can cause potential problems and affect the optimal well trajectory. Designed for both operators and directional drilling contractors, COMPASS directional path planning software can help well construction stay on track.
Our MWD Systems provide legendary reliability and are ready to be deployed on a callout basis anywhere in the world. Since 1996, we have provided cost-effective Measurement While Drilling (MWD) and Logging While Drilling (LWD) solutions to directional drilling companies in both domestic and international markets.
Just bought a Brunton deck mount compass.(what does 70p mean?) Hope this is an okay brand. Do i need to add any silicone or anything where i will be using the screws? Just wondering about any leakage issues. My kayak already has the recessed area so no need to cut anything. Thanks.
My first compass installation. Nervous? YOU BET.
"You mean I have to drill holes in my beloved kayak"?
Yes...
This is how I did it.
I did measure. I used string and placed it as centered and perfect as humanly possible from stern to bow. I marked with pencil the center of the boat. I taped the string to the center of the kayak. I had nothing short of a NASA measurement procedure to ensure I had the compass as perfectly centered as possible. I then placed the compass in the kayak. Marked the area and aligned the screw holes. Marked it. Removed the compass. Drilled. Applied a light silicone glue to the holes just as you suggested and placed the compass. Screwed the compass into place. DONE. It took me 30 minutes. 25 of those minutes was making sure I had the center of the kayak right. I found that the screws that came with the compass were soft as most stainless steel screws are. I stripped the head of one of them trying to give it a light torque turn into place. I went to the boat store and purchased extra screws.
Bolts or sealant--do whatever makes the most sense to you. I've never used the Lexel mentioned above, but if it's less squishy and prone to deterioration than silicone, it's probably better.
Good luck on your installation, and let us know how it went!
Delphinus
Its very easy
I have found it best to drill holes somewhat smaller than the screw threads beforehand as it makes things easier. I have done it both ways and and now I throw away the pattern or hole guide and use the faceplate to locate the holes. I find it trivial to clip the ends of the screws so they are near flush the with under deck surface and have not gone the bolt and nut route. A little dab of Marine Goop on the screws under deck and no problems. Never use sealant in a manner that can prevent the compass globe from being free. As the instructions make clear it needs to be for a few reasons including so it can be readjusted if necessary. Making sure the compass is aligned so the rumb line is true is important, but no need to go crazy about it either. It is relatively easy to run a line from bow to stern and match up the compass.
A portable Global Positioning System (GPS) compass was devised for orienting paleomagnetic drill cores and field test measurements were conducted. Orientation of drill cores has been done by magnetic compasses, sun compasses, and backsighting using landmarks. We modified a lightweight marine GPS compass to be mounted on an orientation device and directly measure azimuths, and compared them to measurements made with a magnetic compass, sun compass, and backsighting. Tests on our campus for a site with open sky above showed a root-mean-squared (rms) error of \(0.39^\circ\), which is less than what is noted on the specifications of the GPS compass, and a difference of \(-\,0.1^\circ \pm 1.1^\circ\) (average rms) between the GPS and sun azimuths for 11 direction measurements. However, the site between buildings showed an average deviation of \(11.4^\circ\) from the sun azimuth due to multipath effects. When tested on drill core sampling of historical lavas in a volcanic island, the GPS azimuths were deviated only by \(0.4^\circ \pm 2.3^\circ\) from the sun azimuths at a flat coastal site with open sky above, indicating that the GPS azimuths are as accurate as the sun azimuths. On the other hand, the GPS compass could not provide azimuths at vertical outcrops in forests due to the small number of satellites captured and multipath effects. If other Global Navigation Satellite Systems (GNSS) satellites are captured and false signals caused by multipath are eliminated, portable GNSS compasses, which operate regardless of rock type, weather, or geographic situation, would replace other methods of orienting drill cores.
Paleomagnetic or archeomagnetic secular variations are currently modeled based on spherical harmonics series as the recent geomagnetic field (e.g., Korte and Constable 2011; Brown et al. 2021), which requires more accurate and reliable paleomagnetic field data to be accumulated. Orienting paleomagnetic samples at outcrops is an indispensable initial step for uncovering remanence directions and greatly affects the accuracy of resulting paleomagnetic field directions. Drilled cores by hand-carried engine or electric drilling devices can be more precisely oriented than block samples (Turner et al. 2015), therefore directional secular variation studies have relied on the drill cores especially from igneous rocks. Orientations of drill cores are usually determined by azimuth and plunge. Although plunge is unambiguously determined with an inclinometer, measuring azimuth angles needs more careful examination by a combination of magnetic or other kinds of compasses.
Magnetic compasses are most often used to measure the azimuth of drill cores because they are compact, easy to handle, and more importantly they can operate irrespective of weather or surrounding conditions. Present magnetic declination values at sampling sites can be drawn from regional or global geomagnetic field models (e.g., Alken et al. 2021). The azimuth measured by a magnetic compass is expected to be properly corrected by the declination value, but measuring azimuth of paleomagnetic samples by a magnetic compass is inherently problematic. In particular, strongly magnetized igneous rocks such as basalts can generate a magnetic field strong enough to alter localized field even within a single outcrop. The magnetic north is usually checked by a sun compass or backsighting at sampling sites, taking some distance from outcrops. However, the orientation of each drill core is rarely examined by a combination of several independent orienting methods.
Orienting each drill core by a sun compass or backsighting is a time-consuming and demanding task. Sunlight enough to operate a sun compass is not always available as it is hampered by clouds, trees or rocks surrounding a sampling site. Backsighting needs distinct landmarks such as sharp mountain peaks or isolated rock bodies that are often difficult to adjust direct sights from an orientation device. An alternative device for independently determining azimuths is a Global Positioning System (GPS) compass; weather condition is no longer a problem to operate, and the signal come from basically overhead, consequently not blocked by surrounding trees or rocks. Lawrence et al. (2009) introduced a GPS compass composed of two GPS receivers for use in Antarctica where sunlight is not readily available. This GPS compass was a large piece of equipment to transport so that each drill core was indirectly oriented using the laser beam with respect to the baseline of the two GPS receivers.
GPS compasses, sometimes called satellite or Global Navigation Satellite Systems (GNSS) compasses, have been used, for example, for automatic solar tracking systems (Wu et al. 2022), for heading in ship navigation (Kakihara 2002; Felski et al. 2020), and more recently for navigation in urban areas (Dabrowski et al. 2020). In this study, a marine GPS compass with two antennas was modified so that it could be directly placed on an orientation device of a drill core. We measured the time variation of the orientation data from the portable GPS compass at a site with open sky above and a site between buildings to determine the initialization time and how it is affected by the surrounding conditions. To find out how accurately drill cores are oriented by the GPS compass, the azimuths were compared with those by sun compass, magnetic compass, and backsighting at sites with different locations, such as on the coast or in the forest.
A compact GPS compass (ssV-102, Hemisphere GNSS Inc.), which was originally developed for vessel navigation and only 0.98 kg in weight, was attached with an acryl block to be directly mounted on an orientation device of a drill core (Fig. 1). The orientation device has a rotatable turntable with a scale of 1 increments, on which a Brunton compass is usually placed. Because the GPS compass is directly mounted on the orientation device, errors in azimuth caused by indirect connections between the orientation device and the GPS compass can be avoided (Lawrence et al. 2009; Cromwell et al. 2013). The plastic housing [40.5(length) \(\times\) 15.0(width) \(\times\) 6.4(height) cm)] accommodates a single board with two GPS antennas to find the direction as well and the position. Electric power of DC 12V was supplied by a waterproof battery box containing ten AA rechargeable batteries. The battery box was modified after the original one supplied by TIMBERTECH Co.,Ltd. To the battery box, the power cable carries back GPS data that were then transmitted by a Bluetooth antenna and received by an Android-based smartphone. Alternatively GPS data can be transferred through a serial port from the battery box to a personal computer.
A portable GPS compass mounted on an orientation device of a paleomagnetic drill core. A battery box supplies DC 12 volts by ten AA rechargeable batteries through a wire, and a smartphone acquires the GPS data through Bluetooth wireless connection. An arrow points to the landmark for backsighting
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