46results about How to "Prevent blowout accidents" patented technology

The invention discloses a downhole blowout prevention technology and belongs to the technical field of downhole blowout prevention. The invention relates to a drill string equipped with a downhole blowout preventer, and the drill string comprises a drill string body, wherein a drill bit is arranged at the bottom of the drill string body. The drill string is characterized in that the downhole blowout preventer is mounted on the drill string body, at least one pressure monitoring and signal generating device is arranged at one end, adjacent to the drill bit, of the drill string body, a signal receiving and alarm generating device is arranged at the upper part of the top of the drill string body, and the signal receiving and alarm generating device is matched with the pressure monitoring andsignal generating device. By adopting the drill string equipped with the downhole blowout preventer, downhole well kick or blowout can be effectively monitored; and furthermore, the alarm signal transfer speed is fast, measures can be timely and effectively adopted for implementing well sealing, the blowout preventer is positioned above a neutralization point, the blowout preventer is in a tension state, the purposes of placing a pipe column downwards for setting and lifting the pipe column upwards for unsealing can be realized, and the well kick or the blowout can be effectively prevented.

The occluder provided by the present invention comprises: a central tube having a first end and a second end opposite to each other, and a liquid inlet hole and a liquid outlet hole are respectively opened on the side walls of the central tube near the first end and the second end; A sealing rubber sleeve outside the central tube; a sliding sleeve that is slidably connected to the first end of the central tube. The sliding sleeve has a first working position for sealing the liquid outlet hole, and a second working position for releasing the plugging of the liquid outlet hole Location. The chamber of the occluder of the present invention and the liquid inlet hole and the liquid outlet hole connected thereto provide a fluid channel; when unsealing, the sliding sleeve is lifted up to make it switch from the first working position to the second working position, and the bottom of the well The high-pressure liquid returns upward through the formed fluid channel to achieve the purpose of pressure relief and prevent blowout accidents from the source.

The invention provides a blanking plug comprising a central tube having a first end and a second end reversed to each other, a liquid inlet, a liquid outlet, a hermetic rubber sleeve and a sliding sleeve. The liquid inlet and the liquid outlet are penetratingly formed in the side walls, close to the first end and the second end, of the central tube; the central tube is nested in the hermetic rubber sleeve; the sliding sleeve is connected with the first end of the central tube in a sliding mode, and the sliding sleeve is provided with a first operating position used for blocking the liquid outlet and a second operating position used for unblocking the liquid outlet. A cavity of the blanking plug, and the liquid inlet and the liquid outlet which are communicated with the cavity form a fluid channel; the sliding sleeve is lifted to unblock the liquid outlet and allow the first operating position to switch to the second operating position; high-pressure fluid from the bottom of a well moves upward through the fluid channel to achieve decompression, and thus blowout accidents can be prevented from the source.

The invention provides a wellhead blowout preventer. The wellhead blowout preventer is mounted on a blowout prevention box of a polished rod sealer and comprises a body, wherein a polished rod passes through the body; a sealing ball capable of leaning against a polished rod hole in the body is also arranged in the body; a thrusting device leaning against the outer side surface of the polished rod is arranged outside the body; the thrusting device can be used for pushing the sealing ball to lean against the polished rod hole in the body when the polished rod is broken off. The wellhead blowout prevention has the advantages of being capable of blocking the polished rod hole in time when the polished rod in an oil-pumping well is broken off and reducing pollution caused by oil gas which falls on ground.

The invention provides an oil production wellhead sealing protection device, which relates to the field of oil production. The wellhead sealing protection device for oil production includes a sealing seat, a polished rod vertically penetrates the middle part of the sealing seat, a pressure gauge is provided on one side wall of the middle part of the sealing seat, and a second sealing chamber is provided at the inner bottom of the second sealing cavity. Two sealing rings, the second sealing ring is arranged on the outer periphery of the polished rod, the inner middle part of the connecting seat and the polished rod form a first sealing cavity, the inner bottom of the first sealing cavity is provided with a first sealing ring, the Both sides of the middle part at the top of the connecting seat are fixedly connected to the collection tank by positioning pins, and the middle part of the collection tank is vertically penetrated with a polished rod. The spinning wheel is driven by the pole to press the second sealing ring, the injection pipe injects the sealant into the second sealing cavity, the pressure wheel improves the sealing between the first sealing ring and the connecting seat, and the triple seal makes the oil well head The sealing effect is good, and the cleaning effect on the polished rod can be realized through the collecting tank and the degreasing ring, which is worthy of vigorous promotion.

The invention discloses a blowout preventing box of a continuous oil pipe and a drill rod. The blowout preventing box comprises a hollow hydraulic cylinder and a flange union connected through connecting rod bolts, and a set of valve assembly is arranged on the two connecting rod bolts opposite in the diameter direction respectively; the hollow hydraulic cylinder is arranged at a hydraulic inlet / outlet; a fixed sleeve is arranged in the cavity of the hollow hydraulic cylinder, an upper guide sleeve is sleeved at the upper end of the inner wall of the fixed sleeve, the upper guide sleeve and the interior of the flange union axially pass through the continuous pipe, a piston rod is arranged between the fixed sleeve and the hollow hydraulic cylinder, and the inner circumference of the lower section of the piston rod is provided with a seam allowance; and a middle guide sealing pressing sleeve and an inner cone guide spacing ring are sleeved on the inner circumference of the seam allowance, the inner circumference of the middle guide sealing pressing sleeve is sleeved with the continuous pipe, a main sealing ring and a lower guide sealing pressing sleeve are arranged between the inner cone guide spacing ring and the continuous pipe, and a hydraulic detection port is bypassed in the radial direction of the flange union. The pressure adjustment of the sealing cavity is convenient; time and labor are saved when the sealing ring is replaced; and the pressure of a wellhead can be detected in real time.