31results about How to "Solve the stuck drill problem" patented technology

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 device and working method for drilling a hydrate micro-hole and rapidly completing the well, and belongs to the technical field of hydrate mining devices and mining methods. It includes a continuous operation machine, a power control mechanism, a high-pressure water jet pump, a guide, a main pipe and a sub-pipe, the main pipe is connected to the continuous operation machine, and a water jet nozzle is connected to the end of the sub-pipe; the working method is generally as follows: first, Use a large-size drill bit to drill to the target layer at one time to form the main wellbore; secondly, use the high-pressure water jet device composed of the sub-tube to drill the horizontal micro-wellbore in the natural gas hydrate reservoir, and then heat the sub-tube to make the skin fall off and leave The screen is lowered; finally, the mother and child pipes are disconnected to complete the well. The invention is applicable to various natural gas hydrate exploitation methods, realizes the integration of drilling and completion, can effectively suppress sand production, increase the output of hydrate reservoirs, has little influence on hydrate reservoirs, and accelerates the progress of drilling.

The invention discloses a simulation experiment method for drilling-blocking prevention of a rock drill in a cave. The method comprises the following steps of: firstly, controlling a rod-disassembling mechanism to pressurize a drilling rod to cause a pressure value of rotary pressure to be stabilized to 12MPa; in the process of the simulation of drilling rocks by a down-the-hole drill, controlling a propulsion handle in an operator cab to pressurize a propulsion mechanism to cause a pressure value of propulsion pressure to be stabilized to 8MPa, and simulating a normal propulsion state of the down-the-hole drill in the process of drilling the rocks; controlling the propulsion handle to depressurize the propulsion mechanism to reduce the propulsion pressure to 5MPa suddenly, and simulating a drilling-blocking phenomenon in the cave and wherein a setting value of a pressure relay of a propulsion circuit is 3MPa, which is less than a critical propulsion pressure value of the drilling-blocking prevention in the cave; and drawing a change curve of the propulsion pressure with changes with time in the process. The method provided by the invention has the beneficial effects that the drilling-blocking problem is solved, the normal drilling operation of the rock drill is ensured, the service life of the rock drill is prolonged, and the body of the rock drill can be assisted to be stressed.

The invention discloses a variable-diameter PDC directional drill, which is provided with a drill body, and a variable-diameter cutting member is arranged on the drill body at least radially, and the linear displacement of the variable-diameter cutting member realizes the cutting diameter of the drill body. Change; in conjunction with the variable-diameter cutting member, a rack-and-pinion transmission mechanism is embedded in the drill bit body, and an elastic body is sleeved on the rack-and-pinion transmission structure; radially on the drill bit body A stationary cutting member is also provided. After the drilling is completed, the outer diameter of the variable-diameter PDC directional drill bit of the present invention becomes smaller, thereby forming a wired measurement drill pipe connected from the hole, a non-magnetic drill pipe, a screw motor and a drill bit with the same outer diameter, effectively solving the problem of It solves the problem of drill bit sticking caused by the shrinkage of the drill hole, and ensures the safety of the drill hole. The rack and pinion transmission structure is adopted to realize the transfer from axial movement to radial movement. The structure is stable and reliable, the bearing capacity is large, the transmission precision is high, and the size of the drill bit can be precisely controlled.

The invention discloses a punched-pile drill blocking processing device. The drill blocking processing device comprises a chassis and a suspension arm. A winch support, a tray for containing a hammer and a suspension arm sliding rail are arranged on the chassis. A winch is arranged on the winch support. The suspension arm comprises two suspension-arm back sections and a suspension-arm front section, and a pulley is arranged at the front end of the suspension-arm front section. Two sliding blocks are arranged on the suspension arm sliding rail and are hinged to the two suspension-arm back sections respectively. The suspension-arm front section is hinged to two supporting frames, and the two supporting frames and the suspension arm form a tripod structure. A steel wire rope with scales on the winch penetrates through the pulley on the suspension arm and then is connected with the hammer. The projection of the hammer is located in a punched pile by adjusting the relative positions of the two sliding blocks and / or moving the two supporting frames. The invention further provides a punched-pile drill blocking processing method. By means of the drill blocking processing device and method, the problems that in the pile-foundation construction process, drill blocking occurs, and construction can not be normally carried out are solved, and smooth construction is guaranteed.

The invention discloses organic salt drilling fluid. The organic salt drilling fluid is prepared from 1%-4% of bentonite, 0.3%-0.5% of sodium carbonate, 0.5%-1% of sodium hydroxide, 0.3%-1% of xanthan gum, 2%-8% of a filtrate loss reducer, 2%-5% of a nanometer blocking agent, 1%-4% of a blocking agent, 0.5%-4% of a lubricating agent, 40%-60% of organic salt and 25%-250% of an inert weighting agent, wherein the nanometer blocking agent is prepared by copolymerizing methacrylic acid carbomethoxy cage-like oligomeric silsesquioxane, N-isopropylacrylamide and acrylamide, and the lubricating agent is prepared by compounding castor oil polyoxyethylene ether, polyethylene glycol and polyvinyl pyrrolidone. The organic salt drilling fluid has the very good heat stability, the low filtration loss and the high blocking performance and lubricating performance and is especially suitable for shale gas well development.

The invention relates to a high-dipping low seam self-walking simple drill coal mining machine and a mining method thereof, which belongs to the drill coal mining machine and mining method. The simple drill coal mining machine comprises a host, a control board, a pumping station, a caterpillar base plate, a support hydraulic column, a pedestal, a stable hydraulic support, a drilling tool assembly and a coal baffle plate. A drilling rod and a drilling rod in the drilling tool assembly are connected through a planetary gear decelerator, the coal baffle plate employs a full transparent design; the invention provides a high-dipping low seam mining method, the height of the support hydraulic column is adjusted to determine the drilling direction, coal mined under gravity effect falls to a scraper plate conveyer along a drill pit, a goaf employs a nature caving method for treatment, and the ventilation mode of a drilling surface is a U type ventilation mode. According to the invention, jamming of a drilling tool can be effectively solved, drilling power and coal breaking effect of the drill coal mining machine can be ensured, and the drill coal mining machine has the advantages of simple production process, low equipment cost of working surface and high technical economic benefit, and the drill coal mining machine has important meaning for increasing coal mining rate and prolong the service time limit.

The invention discloses a jet regulating method for downhole jamming of rotary steering, and relates to the technical field of downhole drilling equipment for oil wells. In the present invention, a jet hole with adjustable area is designed on the drill string of the rotary steerable downhole equipment. When engineers and technicians think that the downhole cuttings bed is seriously accumulated, an instruction is issued to clarify the split ratio of the jet hole and set the equivalent of the drilling tool. The area of ​​the flow channel is calculated by calculating the opening area of ​​the jet hole, allowing a part of the drilling fluid to pass through the jet hole, combined with the rotation of the drill string, to form a rotating jet, destroying the surrounding cuttings bed, and realizing the release of the rotary steerable tool. The invention has simple control and strong jamming ability, and can effectively solve the drill jamming problem of the downhole rotary steering tool.