127 results about "Hole opener" patented technology

An improved hole opener assembly for horizontal drilling is disclosed that is less prone to failure as a result of cone arm break out or pocket side wall fracture. The interface between the cone arm and the pocket employs a key and slot configuration with a tighter fit than between the arm and the pocket to reduce the stress on the pocket side wall during drilling.

The invention relates to well reamer for borehole reaming within a specified interval. The well reamer has a housing with inclined slots, radial holes and a central straight-through channel, in which a spring-loaded rod with holes in the upper and lower parts is located. The upper holes of the rod are covered when the operating elements are extended into an operating position. A plurality of legs, including cutters rotatably supported on the legs, are moved by pistons between an operating position and a transport position along the inclined slots. Free-ends of the pistons may be connected to the rod by sliders, which are movable radially into openings in the rod to connect the rod to the pistons to move the rod with the legs.

The invention discloses a hydraulic hole opener and a hole opening method. The hydraulic hole opener comprises an upper connector 1, the upper connector is connected with the upper end of a body 7 through threads, the lower end of the body is connected with a lower connector 22, an upper ball seat 4 is arranged in the upper connector and is connected with the upper connector through a dowel pin 3, three cutter wing grooves distributed in 120 degrees are formed in the body, a cutter wing 11 is arranged in each cutter wing groove, a mandrel 9 is arranged in the body, a piston 15 sleeves the bottom of the mandrel, a retainer ring 12 is arranged at the top of the piston, and hole opening operation is finished by pushing the cutter wings to expand outwards through the retainer ring. The hole opener is simple in structure, convenient to disassemble and capable of folding the unfolded cutter wings forcedly. Reliability of the cutter wings can be improved by changing a mud channel, cutter wing blocking possibility is reduced, cutter wing deformation is small, and the service life of the cutter wings and the body are prolonged. The safety of the hole opener is greatly improved, and the drill blocking problem caused by the fact that the cutter wings cannot be folded due to fault is solved.

The invention discloses a design method of a three-times-drilling well bore structure of a narrow pressure window well in deep water. The design method comprises the following steps that S1, drillingof a surface layer is carried out, specifically, a drill and a hole opener are adopted to drill into the surface layer, after pulling out the drill, a drilling riser string with the wall thickness being 31.75-38.1mm is placed down into the mud surface, and the upper portion of the drilling riser string is connected with a mud mat and then cement slurry is injected for cementing; S2, first-time-drilling is carried out, specifically, the drill is used for drilling in, after pulling out the drill, a first -time-drilling pipe string is placed down, the upper portion of the of the first-time-drilling pipe string is connected with a wellhead, a wellhead seat is hung at the upper portion of the drilling riser string, and the upper portion of the wellhead is connected with an underwater blowout preventer and an upper portion marine riser and then the cement slurry is injected for the cementing; S3, second-time-drilling is carried out, specifically, the drill is used for drilling in, after pulling out the drill, a second-time-drilling pipe is placed down, the first-time-drilling pipe is hung at an upper casing shoe and the cement slurry is injected for the cementing; and S4, third-time-drilling is carried out, specifically, the drill is used for drilling in, the drill is pulled out after drilling to a target layer, and a third-time-drilling casing with the wall thickness being 12.7-20.24 mm is placed down and then the cement slurry is injected for the cementing. The design method of the three-times-drilling well bore structure of the narrow pressure window well in the deep water solves the problem of low safety and unreasonable cost control of a conventional three-times-drilling well bore structure.

A drilling assembly for simultaneous hole enlargement operations comprises a drill bit, an adjustable diameter reamer, and a hole opener. The reamer is coupled with, and positioned uphole from the drill bit. The reamer is adjustable between a first diameter and a second diameter that is larger than the first diameter. The hole opener is coupled with, and positioned uphole from the reamer.

The invention discloses a hole opener adjustable in hole diameter. A plurality of tool grooves are formed in the upper surface of a tool rest; the inner ends of the tool grooves extend to the position of a through hole, and the outer ends of the tool grooves extend to the side face of the tool rest; a tool groove vertical locking structure is arranged on the inner side face of each tool groove; an annular adjusting disk is coaxially arranged in the tool rest; a track in the shape of a spiral line is arranged on the upper surface of the annular adjusting disk, penetrates from the position below the tool grooves and is perpendicular to the direction of the tool grooves; a hole drilling tool body comprises a tool column and a tool bit; a tool column vertical locking structure is arranged on the side face of the tool column; the tool rest is provided with an adjusting hole; an outer end opening of the adjusting hole is in the outer surface of the tool rest; the inner end of the adjusting hole is arranged in the tool rest; a gear is arranged at the inner end of the adjusting hole; a gear ring is arranged on the lower surface of the annular adjusting disk; and the gear is engaged with the gear ring. According to the hole opener adjustable in hole diameter, the size of the diameter of an opened hole can be freely adjusted, the original situation that numerous drill bits in different fixed hole diameter specifications are needed when a hole opener product set material is manufactured is changed, materials are saved, and the carrying space is saved.

The invention belongs to the technical field of well completion of petroleum and natural gas industries, and particularly relates to an electro-hydraulic downhole casing hole opener. The electro-hydraulic downhole casing hole opener is characterized by comprising a ground system, an electro-hydraulic power unit connected to the ground system through a cable and a hole opening unit connected to theelectro-hydraulic power unit; the electro-hydraulic power unit comprises a support frame, a fuel tank, a motor, a hydraulic pump, a relief valve connected to the hydraulic pump, an electromagnetic directional valve I and an electromagnetic directional valve II, wherein the electromagnetic directional valve I and the electromagnetic directional valve II are connected to the output end of the relief valve and arranged in parallel; and the hole opening unit comprises a unit body provided with four flow passages of the flow passage A, the flow passage B, the flow passage C and the flow passage D,a hydraulic motor, a piston bush connected with a motor output shaft through a spline, a drill bit in threaded connection with the piston bush and a pressing cap. The electro-hydraulic downhole casing hole opener transmits electric energy to the downhole from the ground through a cable, and the downhole hole opener is provided with the motor and a hydraulic power system, drives the drill bit to rotate and cut a casing, realizes hole opening of the casing, and provides conditions for implementing a next step of operation.

The invention relates to an installation method of a sensor free from pressure release, which is characterized in that a valve seat is welded at a pipeline, and one end embedded with a hole opener is screwed into the valve top tube in a revolving way; when the end reaches the valve, the valve is opened; a screw thread long rod provided with the hole opener is screwed into a position close to a pipeline wall; when an electric portable drill is turned on to drill through the pipeline wall and the hole opener is retreated to the outside of the valve, the valve is closed; the hole opener continues to be retreated until the hole opener is dismantled; a metal conduit embedded with a sensor probe is screwed into the valve top tube in a revolving way; when the metal conduit reaches the valve, the valve is opened; the probe provided with the sensor passes the valve, enters the pipeline and contacts with medium; a sealing screw cap on the metal conduit is screwed down in a revolving way and leans against the valve top tube to be fixed; 500-2000 thin screw threads are respectively arranged inside the valve top tube, outside the metal conduit and the screw thread long rod, and resistance of 500-2000 screw threads is generated on the medium which enters the pipeline by pressure after the valve is opened; as a result, the medium inside the pipeline is blocked without affecting installation of the sensor.