A seismic sensor stake, system and method configured to orientate three seismic 1C sensors orthogonally in the X, Y, and Z directions. The present technology stake is configured to efficiently and effectively convert three independent seismic sensors into a single three seismic sensor unit. Multiple stakes can be inserted into the ground of a geographical area to provide highly accurate seismic survey of subterranean hydrocarbon formations. Each seismic sensor can include a slot that slidable receives a threaded member of a mounting sides of the stake. A retaining nut can secure the seismic sensor in place upon rotation of the sensor. A stake bit can be utilized with an impact hammer to form holes in hard or frozen ground for quick insertion of the stake into the ground.

The present invention describes a mechanical coupling microseismic monitoring system, which includes at least one microseismic sensor, push rods that are arranged at both ends of the microseismic sensor through a first connection mechanism to send the microseismic sensor into the monitoring hole, introduction mechanisms that are mounted on the push rods for introducing the microseismic sensor into the monitoring hole, and one microseismic monitoring computer that receives signals from the microseismic sensor; the microseismic sensor is a recoverable microseismic sensor; the first connection mechanism is a connection mechanism that can make the push rod swing relative to the microseismic sensor; the introduction mechanism is a three-roller introduction mechanism. The present invention meets the requirement of microseismic monitoring for different parts of deep monitoring hole using multiple microseismic sensors.

A seismic node (1) for an ocean bottom seismic survey comprising: At least one seismic sensor capsule (2), a seafloor casing (6) comprising a lower surface configured to make contact with a seabed. The seismic sensor capsule (2) comprises first engagement means; the seafloor casing (6) comprises second engagement means (10). The first and second (10) engagement means are adapted to releasable engage with each other whereby the seismic sensor capsule (2) is releasably fastened to the seafloor casing (6). The seismic sensor capsule (2) is adapted to be removed from the seafloor casing (6) after a certain time T. The seafloor casing (6) is configured to be left permanently on the seabed.

The present invention discloses a microseismic monitoring system, which includes at least a microseismic sensor, a push rod set at both ends of the microseismic sensor through the first connecting mechanism for sending the microseismic sensor into a monitoring hole, a guide mechanism installed on the push rod for guiding the microseismic sensor into the monitoring hole, and a microseismic monitoring computer connecting with the microseismic sensor signal. The microseismic sensor is reusable. The first connecting mechanism can make the push rod swing relative to the microseismic sensor. The guide mechanism is a three-roller guide mechanism. The present invention can satisfy the need of monitoring different locations in monitoring holes with large depths for multiple microseismic sensors, and solve problems of effective contact coupling between the microseismic sensors and monitoring holes, which improves the accuracy of microseismic monitoring and reduces the cost of a microseismic monitoring system.

The present invention discloses an acoustic sensor for rock crack detection including an acoustic emission probe, a probe installation mechanism and a transmission mechanism which transmits a combination of the probe installation mechanism and the acoustic emission probe to a setting position inside a borehole in the monitored rock mass. The acoustic emission probe installation mechanism essentially includes a sleeve component, a guide component, an end cap and springs. The guide component is in pluggable connection with the sleeve component or the end cap. The assembled probe installation mechanism locks the acoustic emission probe in a probe sleeve of the sleeve component. The springs inside the elastic sleeve of the sleeve component are in a compressed state.

A test system for a microseismic test of rock mass fractures provided by the present invention includes at least one microseismic sensor, a push rod provided at two ends of the microseismic sensor through a connecting mechanism for feeding the microseismic sensor into a monitoring hole , an introducing mechanism mounted on the push rod for introducing the microseismic sensor into the monitoring hole, a hydraulic system providing support hydraulic oil for the microseismic sensor, a microseismic monitoring computer connected with the signal of microseismic sensor through; the microseismic sensor includes a microseismic probe, a holding component holding the microseismic probe, a support plate and a hydraulic support mechanism; the connecting mechanism can make the push rod swing relative to the microseismic sensor, and the introducing mechanism is three-rollers introducing mechanism.

A marine survey node can include a body to be deployed to a seabed, a marine survey receiver coupled to the body and to acquire marine survey data, and a soil sample module associated with the body to collect a soil sample from the seabed. A soil sample module can include a vessel, a first valve coupled to the vessel, and a spike coupled to the vessel. The spike can penetrate an earth surface. The first valve can maintain a pressure difference between the vessel and the spike when closed and equalize a pressure between the vessel and the spike when open. An inlet in the spike can equalize pressure between an inside of the spike and an outside of the spike and to collect a soil sample from the earth surface.

The present disclosure discloses a coupling evaluation geophone, comprising piezoelectric ceramic crystal 1, 2 and 3, a geophone 4 and a relevant supplying circuit. Three piezoelectric ceramic crystals 1, 2 and 3 are respectively provided on the top and two lateral sides of the geophone 4. By processing measurement data derived from the coupling evaluation geophone, a ground-geophone coupling effect is obtained at a corresponding embedment point of the coupling evaluation geophone. An effect of the ground-geophone coupling on an earthquake data can be eliminated by calculation. Data detected by the coupling evaluation geophone is improved in fidelity, Signal/Noise ratio and resolution.

The invention discloses a monitoring system for deformations and destructions of a gas storage, including an acoustic emission sensor installed in a borehole of a monitored rock mass and a ground workstation. The acoustic emission sensor includes an acoustic emission probe and a probe installation mechanism for installing the acoustic emission probe and a transmission mechanism for transmitting the probe installation mechanism. The probe installation mechanism includes a shell, a probe sleeve and two sets of pistons hydro-cylinder components. The present invention realizes the control of the moving direction of the shell and the probe sleeve by the piston hydro-cylinder component and the hydraulic pump, thus solving the problem of effective installation and coupling of the acoustic emission probe, ensuring the effective coupling between the acoustic emission probe and the wall of the borehole.

The invention discloses a rock damage acoustic monitoring system including an acoustic emission sensor installed in a borehole of a monitored rock mass and a ground workstation. The acoustic emission sensor is composed of an acoustic emission probe and a probe installation mechanism for installing the acoustic emission probe and a transmission mechanism for transmitting the probe installation mechanism. The probe installation mechanism includes a shell, a probe sleeve installed in the shell, an end cap fixed on the upper end surface of the probe sleeve, and a piston hydro-cylinder arranged between the top of the inner wall of the shell and the end cap. The present invention realizes the control of the moving direction of the shell and the probe sleeve by the piston hydro-cylinder component and the hydraulic pump.