21 results about "Well drilling" patented technology

The disclosure is drawn to methods of drilling wells utilizing blow out prevention components of differing pressure ratings. In the initial drilling phase, a lower pressure rated blow out prevention component is used. In a subsequent drilling phase where a reservoir of a natural resource is penetrated, a higher pressure rated blow out prevention component is used.

The invention discloses a planetary drill bit assembly for balancing the reactive torque of drilling equipment in well drilling and relates to the technical field of drill bits and drilling equipment for oil drilling. The planetary drill bit assembly comprises a planetary structure, a pressure compensating device, and inner and outer drill bits. One end of a drive shaft is connected with an internal drill bit assembly; the middle part of the drive shaft is sleeved with a drive shell; an external drill bit assembly is fixedly arranged outside the drive shell; and a planet bracket tray, a planet bracket and a plurality of planet gears are positioned between the drive shell and the drive shaft. In the invention, the external and internal drill bits are driven by the same drive mechanism to rotate simultaneously and the rotation speed of the external drill bit varies automatically with the change of the drilling speed, so the drill bit can adapt to and eliminate or balance the reactive torque generated by the different drilling speeds in real time. And thus, and the stability and directional control capability of the drill bit are further increased.

The invention provides a high-temperature miniaturized resonant gyroscope. The gyroscope comprises a harmonic oscillator, a circuit board, piezoelectric elements, a supporting base, a shell and binding posts, wherein the harmonic oscillator is arranged in the shell and connected with the supporting base, and the piezoelectric elements are connected with the binding posts through a metal conductor.Key process points of internal elements of the gyroscope are fixedly connected by adopting a high-temperature material and a high-temperature process, and the gyroscope is a small-size gyroscope capable of working at a high temperature. The invention also provides an inertial navigation system. The system comprises a three-axis gyroscope, a three-axis accelerometer and a shock absorber, wherein the gyroscope is fixedly connected with the shock absorber, and the gyroscope adopts the high-temperature resonant gyroscope. The invention further provides a drilling measurement system and a drillingmeasurement method. The system has the environmental adaptability under high temperature, strong vibration and large impact and has the advantage of small volume of drilling measurement. The method is used in the measurement system, and underground position measurement can be accurately carried out.

The invention discloses a controlled ultra-short radius guiding well drilling system and method, and relates to the technical field of well drilling, the system comprises a drilling machine, a conventional drill rod, a flexible drill rod structure, a data relay transmission short section structure, a flexible motor structure, a measurement-while-drilling short section structure and a drill bit which are connected in sequence; the measurement-while-drilling short section structure is used for measuring well deviation and azimuth information; the data relay transmission short section structure is used for receiving well deviation and azimuth information measured by the measurement-while-drilling short section structure and sending the well deviation and azimuth information to a drilling machine; the flexible drill rod structure comprises at least one flexible drill rod short section, and the flexible motor structure comprises at least one flexible motor. The well drilling method can be used for directional well drilling and composite well drilling. According to the method, the purposes of well track control and drilling speed increasing and efficiency increasing of the ultra-short radius directional well are achieved.

The invention discloses a quantitative evaluation method suitable for the borehole wall stability of a horizontal section of deep shale gas. The quantitative evaluation method comprises the following steps: 1, quantitatively calculating formation collapse and fracture pressure; 2, quantitatively representing uncertainty of formation collapse and fracture pressure; 3, calculating the drilling ECD of the horizontal section of the shale gas, and quantitatively representing the uncertainty of the drilling ECD of the horizontal section of the shale gas; 4, based on the quantitative representation of the formation collapse and fracture pressure uncertainty in the step 2 and the quantitative representation of the shale gas horizontal section drilling ECD uncertainty in the step 3, quantitatively evaluating the shale gas horizontal section well wall stability, namely, an analysis model for quantitatively evaluating the well wall stability is established. According to the method, the difficulty in identifying the borehole wall instability of the horizontal section of the deep shale gas is solved, the quantitative evaluation of the borehole wall stability is realized, the fault occurrence rate can be effectively reduced, the drilling efficiency is improved, the drilling period is shortened, and technical support is provided for reducing the cost and increasing the speed of shale gas drilling construction.

The invention discloses a packer, a setting tool and an integrated method of well drilling and well completion. The packer comprises a cylindrical upper joint, a cylindrical lower joint, an external sleeve for connecting the upper joint and the lower joint, a rubber cylinder piece with the upper end fixedly connected with the upper joint, and an internal sleeve for limiting the lower end of the rubber cylinder piece, wherein the rubber cylinder piece is located in the inner cavity of the external sleeve, the upper end of the internal sleeve is selectively and fixedly connected with the upper joint, the lower end of the internal sleeve extends in the inner cavity of the external sleeve through the rubber cylinder piece, wherein a first clamping and hanging part is arranged on the inner wallof the internal sleeve, the packer is installed on a sleeve pipe in advance, and is opened by the setting tool installed on a drill pipe when necessary.

The invention discloses a gas-liquid converting stable borehole liquid for well drilling as well as a preparation method thereof and belongs to the drilling engineering field of petroleum industry. The stable borehole liquid is prepared from the following components in parts by weight: 30-60 parts of base oil, 5-10 parts of a cationic surface active agent, 2-5 parts of a nonionic surfactant, 3-10 parts of polydimethylsiloxane, 10-15 parts of oil soluble resin, 5-10 parts of petroleum asphalt, 5-10 parts of polymeric alcohol and 5-20 parts of deionized water. The preparation method comprises the following steps: heating and stirring the base oil and nonionic surfactant in a reaction kettle; adding the cationic surface active agent to stir; adding polydimethylsiloxane to stir; adding the oil soluble resin and petroleum asphalt to stir; adding the polymeric alcohol and water to continuously stir; then, cooling to 25+/-5 DEG C under a stirring condition and discharging and packaging. The gas-liquid converting stable borehole liquid disclosed by the invention is used for solving the problem that a protective layer is unevenly and discontinuously covered due to viscosity factor and solving the problem that the anti-scouring capacity of the single protective layer is low.

The invention discloses a spraying method for an electric arc spraying coating of a well drilling water string and a hole sealing coating thereof. The spraying method comprises the steps that a protective coating is prepared on the surface of a water string base body by an electric arc spraying process, and at the same time, the hole sealing coating is sprayed, and the protective coating of the surface of the water string with high hardness, wear resistance and pitting corrosion resistance is obtained. The service life is effectively prolonged, and the cost of use and maintenance is reduced.

The invention discloses a treatment system and method for mixed waste liquid of drilling wastewater and fracturing flowback fluid. The system comprise a wastewater storage unit, a flocculant filling unit, a coagulant aid filling unit, a static mixing unit, a micro-chemical flocculation unit, a gravity settling unit, an ion masking agent filling unit and an ion exchange unit. A flocculant is addedto the mixed waste liquid of the drilling wastewater and the fracturing flowback fluid sequentially and evenly mixed with the mixed waste liquid, a coagulant aid is added to the mixed waste liquid ofthe drilling wastewater and the fracturing flowback fluid for reaction, floating matter and precipitates are finally removed by standing, corresponding treatment agents are selected according to the characteristics of different metal ions in the wastewater to remove calcium, magnesium and boron ions in the wastewater, and treatment can be completed with the process. After treatment with the process, the concentration of suspended matter in water is lower than or equal to 10 mg/L, the concentration of calcium ions is lower than or equal to 300 mg/L, the concentration of magnesium ions is lowerthan or equal to 150 mg/L, and the concentration of boron ions is lower than or equal to 10 mg/L. The treated mixed waste liquid of the drilling wastewater and the fracturing flowback fluid can be used for guanidine gum fracturing water in tight gas wells, and reuse of water resources is realized.

The invention belongs to the petroleum equipment technical field and discloses an oil drilling motor. The oil drilling motor includes a base, a controller and miniature infrared cameras; the base is provided with a motor main body; the motor main body includes a main shaft, a rotor assembly, a carbon brush, a cast aluminum electric heating plate, an oblique brush holding assembly and a brush holding clamp which is arranged through bolts; a junction box assembly is arranged to one side of the motor main body; an explosion-proof tube and an explosion-proof tube are arranged between the junctionbox assembly and the motor main body; the junction box assembly is of a positive pressure explosion-proof structure; the upper right corner, the lower left corner, and the lower right corner of the motor main body are respectively provided with the miniature infrared cameras respectively; transparent protective hoods are disposed outside the miniature infrared cameras respectively; the output endsof the miniature infrared cameras are connected with the input end of the controller; and the output end of the controller is connected with an LED display. The oil drilling motor of the present invention has the advantages of strong overload capacity, high reliability, easiness in maintenance and the like.

The invention discloses a system for lead screw rope arrangement of a well drilling winch. The system is mainly composed of a lead screw (4), a driving device (1) and a nut (5), wherein the driving device (1) is connected with the lead screw (4), the nut (5) is installed on the lead screw (4) in a sleeved mode, and a reversing device is installed on the lead screw (4) in a sleeved mode. The invention further discloses a method for the lead screw rope arrangement based on the system for the lead screw rope arrangement. According to the system and the method for the lead screw rope arrangement of the well drilling winch, structure is compact, machining is easy, a transmission ratio of the lead screw rope arrangement is standard, the rope arrangement is relatively even, dense, simple and direct, and installing is convenient.

The invention discloses a multiphase CO2-based horizon type geothermal enhanced mining method, which adopts a mining mode of single main shaft transformation heat extraction-auxiliary shaft monitoring, greatly reduces the drilling cost and improves the utilization efficiency of a single drilling well. The volume transformation range is increased according to the principle that liquid CO2 is subjected to phase change expansion fracturing after being heated when being injected into a geothermal layer, CO2 gas is changed into CO2 fluid in a supercritical state along with continuous increase of internal pressure and temperature during phase change fracturing, and after fracturing is completed, the CO2 fluid is converted into CO2 fluid in a supercritical state. At the moment, the CO2 fluid in the supercritical state carries a large amount of geothermal energy after exchanging heat with a geothermal layer, finally, the CO2 fluid in the high-temperature supercritical state enters a heat exchanger for heat exchange and cooling, the extracted heat is used for power generation of a power generation device, and the cooled CO2 gas after heat exchange is cooled through a low-temperature condensation pipe and is liquefied into liquid CO2 again; therefore, closed-loop utilization of the CO2 working medium is realized; and finally, the overall mining efficiency of geothermal resources is improved.

The invention relates to a drilling pump used for drilling. The drilling pump comprises a pump body and a power plant. The pump body comprises a rack assembly, a power end assembly and a fluid end assembly. The power end assembly is provided with an eccentric shaft, and the power input end of the eccentric shaft is directly connected with the power output end of the power device. The power device comprises a power source, a speed reducer, a clutch and a universal shaft. The clutch is connected between the power source and the input end of the clutch, and the output end of the clutch is connected with the universal shaft. As a pinion shaft and a gear ring which is fixed to a crankshaft and meshed with the pinion shaft are omitted from a power transmission part, one gear transmission pair is omitted, the whole power transmission system is simplified, and the loss during power transmission is lowered; besides, the structure is simplified, the size is reduced, and the weight is lowered; during production, the machining procedures of the pinion shaft and the gear ring are omitted, so that the production cost is lowered, and the production cycle is shortened.