30results about How to "Reduce drilling accidents" patented technology

The invention relates to a portable magnetic memory detector for a drill rod, which is applied to nondestructive examination for a petroleum drill rod. The detector body is fixed with a magnetic memory sensor; a detector stander is provided with a right-angled steel plate of which the shape is of a right angle square; and the middle of the right-angled steel plate is fixed with a diaphragm plate on which a bearing and a roller are fixed. Two ends of the right-angled steel plate are fixed a motor box and an electric motor respectively. The outside of the right-angled steel plate is fixed with a split detecting ring. The magnetic memory sensor is fixed on the inner wall of the split detecting ring. A stroke sensor is arranged on the roller. The inner wall of the split detecting ring is provided with 16 magnetic memory sensors evenly. The portable magnetic memory detector has the advantages that the magnetic memory detector detects residual magnetic field intensity of the drill rod, provides a fire-new nondestructive examination method for the petroleum drill rod, provides data for evaluating surface damage of the drill rod, and plays a quite important role in reducing drilling accidents and ensuring drilling production safety.

The invention discloses a concentric pipe rock debris sucking and crushing device suitable for dual-gradient drilling. The device is internally provided with a drilling fluid flowing channel providedwith two open axial ends, wherein the drilling fluid flowing channel is in shunted communication with a drilling fluid flowback channel, the inlet end of the drilling fluid flowback channel is locatedin the device, the outlet end of the drilling fluid flowback channel is provided with a crushing portion, the drilling fluid flowback channel is provided with a first jet flow throat portion and a second jet flow throat portion, and a mixing cavity is formed in the position, located between the first jet flow throat portion and the second jet flow throat portion, of the drilling fluid flowback channel. The device is also internally provided with an annulus drilling fluid upward-returning channel capable of making the device outside and the mixing cavity communicated, and the annulus drillingfluid upward-returning channel and the drilling fluid flowing channel are peripherally arranged in a spaced way. The concentric pipe rock debris sucking and crushing device suitable for dual-gradientdrilling facilitates horizontal drilling rock debris carrying, decreases rock debris beds, reduces the drilling cost and ensures safe and efficient drilling.

An identity identification method and device applied to petroleum drill pipe operation, the method comprising: conducting a magnetic marker processing on a specific region of a drill pipe; detecting a change in a magnetic characteristic at the specific region; and upon detecting an anomaly value of the magnetic characteristic, detecting the magnetic marker of the drill pipe, and acquiring a code number of the drill pipe based on a position, width and / or magnetic anomaly amplitude information of the magnetic marker. The advantages of the present invention are: first, the invention is easy to achieve, acquiring the drill pipe code number based on the position, width and / or magnetic anomaly amplitude information of the magnetic marker; second, the invention facilitates automatic reading by a machine, in particular facilitates automatic reading of the code number during drilling in the field; and third, the invention, via the drill pipe code number, obtains identity information of the petroleum drill pipe so as to establish a record for each of the drill pipes, thus enabling the length of time each drill pipe operating under various depth, tension / pressure, vibration and mud corrosion conditions to be known, thereby achieving a more scientific drill pipe classification, thereby reducing drilling accidents, preventing excessive allowance after retiring drill pipes, and reducing overall cost of the drilling operation.

The invention discloses a while-drilling monitoring method and device for formation pressure. The monitoring method includes the steps that the change of drilling parameters in the drilling process is monitored, whether drilling operation is conducted on an over-pressure packing layer or not is judged, and if yes, a drilling system gives out warning information, or else drilling operation continues being conducted. The change of the drilling parameters in the drilling process is monitored, the warning information is given out before drilling operation is conducted on the over-pressure packing layer, the mud density of a shaft can be automatically or manually adjusted in time, potential hazards of well kick, blowout and the like which are probably caused are eliminated through an effective well control method, and drilling accidents are reduced.

The invention discloses a high-stress soft outburst coal seam mining method which comprises a coal seam gas extraction method, wherein the coal seam gas extraction method comprises the steps of drilling with an arc-shaped three-edge drill rod matched with the air compressing and slagging drill technique, extracting gas at the position close to a drilled hole, and conducting dedusting on the hole, average drilling depth is 75 m - 80 m, the gas releasing rate of a great coal working surface reaches over 60%, the content of residue gas of a protected coal seam is below 7 m<3> / t, and during tunneling of the great coal working surface, the absolute gas discharge is 2.0 m<3> / min - 2.5 m<3> / min, and the maximum gas density of a return current is about 0.3 percent; during stoping of a stope working surface, the absolute gas discharge is 3.5 m<3> / min - 4.5 m<3> / min, the maximum gas density of a return current is about 0.4 percent, and the gas density on a corner of the stope working surface is 0.6 percent at most; a hole deduster is used for dedusting during drilling, and then dust concentration of the working surfaces is reduced.