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Conventional truck mounted seismic vibrator

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    Two successive models of truck-mounted seismic vibrators were designed and manufactured to ensure the highest possible levels of vehicle safety while also delivering excellent data quality. Seismic vibrators are the preferred energy sources for land vertical seismic profile VSP surveys because they are relatively repeatable and controllable, have high energy but a low HSE impact, and are cost effective. Recent advances in vibrator design have enriched the quality of VSP data, but the improvements have been mainly applied only to buggy-mounted vibrators. Buggy-mounted vibrators are typically used for surface seismic surveys in remote areas, and thus their design has been optimized for off-road performance. Surface seismic surveys have typical durations of a number of months or even years.
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    US4484656A - Carrier vehicle for seismic vibrational system - Google Patents

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    A sweeping change in borehole seismic sources

    Vibrators are the preferred sources for onshore vertical seismic profile VSP surveys. Truck-mounted units are especially useful as they are more road mobile than buggy-based units. In particular, they can be driven directly to the wellsite, resulting in improved response times, simplified logistics with fewer vehicles and personnel at the wellsite and improved transport safety. Acquiring broad-bandwidth, high-quality VSP data, using state-of-the art vibrator equipment, however, has generally required the use of the latest buggy-mounted vibrators, compromising well-site logistics and transportation safety for VSP operations. To deliver optimum performance, two new truck vibrator models specifically designed to take advantage of all of the most recent developments in vibrator technology while retaining the logistical advantages of truck-mounted units have been developed. These new truck-mounted vibrators offer greatly improved data quality with tests showing that they can transmit a signal with a frequency bandwidth of 6. Being mounted on modern truck chassis these vehicles retain all the mobility and HSE advantages of truck vibrators.
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    US3884324A - Mounting for seismic vibrator - Google Patents

    A seismic exploration vehicle includes a main frame upon which a vibrator assembly and control cab are positioned and front and rear powered tractors connected to the main frame for desired pivotal movement relative thereto. The vehicle is quickly and easily assembled or disassembled into five basic component parts for air transportation and to facilitate ready replacement of damaged parts without undue downtime. Each tractor is provided with a unique control stick for complete operation of the associated tractor, and the control cab is provided with an identical control stick which is operably connected to the control sticks on the tractors when the vehicle is assembled so that the operation of the vehicle can be controlled from either tractor or from the control cab. The vibrator assembly includes a vibrator mass which is reciprocal at a desired frequency by an operator controlled hydraulic system. The mass is isolated from the remainder of the vehicle by an air suspension system which damps both horizontal and upward vertical force components in such a way as to concentrate the application of force in a downward direction to most efficiently transmit seismic waves into the earth.
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    Effective date : Year of fee payment : 4. An over-the-road type vehicle for transport and powering of a seismic hydraulic vibrator which is adapted to operate in either one of two modes of operation. A first mode is the conventional mode wherein the vehicle is operated over large distances at varying road speeds, obtained by use of multiple gear ratios, and varying engine speeds.
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