49results about How to "Reduced risk of stuck pipe" patented technology

One kind of mechanical type automatic vertically well-drilling tool, including turner, the conduction current head, the bearing, the counterweight, the spindle, in-tube, the back plate, above plate-valve, gets down plate-value, the shell, the piston cylinder back plate and the piston, its principle is at the right moment induces the well slanting gravity signal, by the gravity-actuates in the organization, the establishment drills inside and out the column high-low pressure channel between the fluid, uses two between the differential pressure, actuates the piston at the right moment to push depends on the wall of a well is high side, the wall of a well reacting force then pushes the drill bit to is low side, but in well-eye other positions, the piston does not push depends on the wall of a well, drills the column revolves, this process circulation reciprocation, the well is slanting namely is unceasingly induced and the revision, this invention realization is initiative, At the right moment guards against slanting at the same time, but also can effectively liberate distilling, largely enhances drills fast and well-eye the quality, reduces the construction risk, this invention has the structure is simple, reliable, is suitable to the many kinds of well drilling platform, the processing makes the maintenance cost is low and so on the characteristic.

The invention discloses a rotation-free pawl-type sliding sleeve with a ball seat capable of being taken out. The sliding sleeve comprises a sliding sleeve body, an inner sliding sleeve and a ball seat cylinder, wherein the sliding sleeve body is composed of an upper connector, an outer cylinder and a lower connector. The sliding sleeve body and the inner sliding sleeve are fixed through a shear nail, the inner sliding sleeve and the ball seat cylinder are fixed through a shear nail, a fluid outlet hole is formed in the upper portion of the outer cylinder, and a clamping spring hole is formed in the lower position of the middle of the inner wall of the outer cylinder. An annular switch clamping groove is formed in the inner wall of the upper portion of the inner sliding sleeve, a plurality of split pawl clamping grooves are formed in the inner wall of the middle of the inner sliding sleeve in the peripheral direction, and a clamping spring is installed on the outer wall of the middle of the inner sliding sleeve. A plurality of male pawls are arranged at the upper end of the ball seat cylinder in the peripheral direction, a plurality of female pawls are arranged on the inner side of the lower end of the ball seat cylinder in the peripheral direction, the male pawls are clamped into the split pawl clamping grooves, and a variable diameter ball seat is arranged in the ball seat cylinder. When the inner sliding sleeve moves to the lower end of the outer cylinder, the clamping spring on the inner sliding sleeve is clamped into the clamping spring hole in the outer cylinder. All base seat cylinders can be salvaged through non-rotating type tubular columns in a disposable mode, and a full through path is achieved.

The invention relates to a two-way reamer, belonging to the technical field of special tools for horizontal directional drilling crossing engineering. The two-way reamer consists of a hollow transmission shaft, a roller bit and a centralizer, wherein one end of the hollow transmission shaft is a joint, and the other end of the hollow transmission shaft is provided with connecting threads; a baffle is welded in a central hole of the hollow transmission shaft; an installation base is welded on an outer pipe wall of the hollow transmission shaft corresponding to the baffle; a positive roller and a negative roller are welded on the installation base; and a through hole communicated with water holes of the positive roller and the negative roller and the central hole of the hollow transmission shaft is arranged on the installation seat. Due to the positive roller and the negative roller, the two-way reamer is controlled by a primary drilling machine and a secondary drilling machine respectively; when the hole cannot be extended in a positive direction, the hole can be extended in a negative direction by a secondary roller group; the hole can be extended for several times in a section in which the hole is difficult to form, therefore, the problem that the drilling machine is clamped during the negative hole extension is avoided, the construction difficulty is reduced, and the working efficiency is improved.

The invention discloses a coiled tubing drilling polishing horizontal section cement plug downhole tool combination, comprising a coiled tubing, a coiled tubing connector, a plug detecting tool string or a drilling polishing tool string. When using the coiled tubing drilling polishing horizontal section cement plug downhole tool combination provided by the invention, the size of the tool string can be changed flexibly according to the size of the well, so as to meet the drilling polishing requirement of small well. Meanwhile, the tool combination can penetrate through the well section with large dogleg degree and steps and can be used for the drilling polishing of the cement plug with long horizontal section, therefore the application range is wider. The continuous drilling is realized, the drill blocking risk during the drilling polishing process is reduced effectively, and the working efficiency is improved. In addition, by utilizing the coiled tubing, the drilling polishing works of well with pressure, in particular to the well with higher pressure after being drilled can be implemented. The invention further discloses a coiled tubing drilling polishing horizontal section cement plug technology using the coiled tubing drilling polishing horizontal section cement plug downhole tool combination.

The invention belongs to drilling tools for pile foundation engineering, and relates to a drill bit for variable diameter drilling. The device is modified and optimized on the basis of a traditional drill bit. The device comprises a drill pipe, a movable knife row mounting base, a movable knife row, an oil cylinder, an oil cylinder mounting base, a pin, a spiral drill bit, the movable knife row isinstalled on the movable knife row base and tightened by the oil cylinder, and the size of opening of movable knife row blades can be controlled by controlling telescoping of the oil cylinder so as to achieve the variable diameter effect. Compared with the prior art, the drill bit has the advantages that drilling and hole expanding are conducted simultaneously, the hole collapse probability is effectively lowered, drilling resistance can be reduced, the drilling efficiency is high, the drilling sticking risk is reduced, and the drilling safety is guaranteed.

The invention discloses a 3.5-inch sidetracked slim hole sectioned fracturing pipe column. The 3.5-inch sidetracked slim hole sectioned fracturing pipe column comprises an oil tube, a strengthening nipple, a hydraulic anchor, a backwash valve, a packer, a setting ball seat, a sandblaster, a ball receiving basket, a 3.5-inch sidetracking small casing and an original casing. Windowing is conducted in the original casing for drilling a slim hole; then, the 3.5-inch sidetracking small casing is used for well cementing and completion; the strengthening nipple, the hydraulic anchor, the backwash valve, the packer, the setting ball seat, the sandblaster and the ball receiving basket are all located in the 3.5-inch sidetracking small casing, the oil tube, an adapter nipple and a safe releasing subare all located in the original casing, and the oil tube, the safe releasing sub, the adapter nipple, the strengthening nipple, the hydraulic anchor, the backwash valve, the packer, the setting ballseat, the sandblaster and the ball receiving basket communicate sequentially from top to bottom; and fire perforating and reperforating, fracturing, and plugging through sanding filling or through a run bridge plug are carried out sequentially in the 3.5-inch sidetracking small casing from bottom to top till fracturing of all layer sections is completed, wherein a perforated section is located below the ball receiving basket. Through the pipe column, sectioned fracturing can be achieved, and the drilling tool jamming risk is small.

The invention provides a horizontal well rapid water exploration method. A screwed plug is connected with a Y211 packer, the upper end of the Y211 packer is connected with a screen pipe, and the upper end of the screen pipe is connected with an oil pipe. The upper end of the oil pipe is connected with an oil-well pump. According to the golden section principle, horizontal well packer setting position layouts with different spraying point numbers are established, and the setting position of the Y211 packer is determined from the layouts. According to the water containing fluctuation judgment rules, the pumping and sucking results are diagnosed, the spraying point water breakthrough possibility of the upper end or the lower end of the Y211 packer is excluded, and the like, the suspected water breakthrough spraying point range is decreased step by step till the water breakthrough spraying points are determined finally. According to the horizontal well rapid water exploration method, through upward lifting and downward putting for setting and unsetting, airtightness is good; the pumping and sucking liquid quantity of every time is the liquid quantity of the spraying points of the upper portion of the packer, and the problem that in single-section testing, the low liquid quantity is large in water containing fluctuation and difficult in dereferencing is solved; a down-hole testing pipe string structure is simple, reliable in overall performance, low in cost and small in drilling jamming risk; and the diagnosis method is scientific and reasonable, section-by-section testing is not needed, the water exploration speed is high, the period is short, and the cost is low.

The invention relates to a method for determining a medium-and-large-radius track of a two-dimensional small-pre-target-displacement horizontal well. The method sequentially comprises the following steps that the position of a first target spot, the position of a second target spot and the position of a wellhead are determined, the displacement and the true vertical depth of the first target spot and the displacement and the true vertical depth of the second target spot are obtained, a third-part horizontal segment rail is determined, and the third horizontal segment track extends along a connecting line between the first target spot and the second target spot; a second-part angle-gain landing track is determined upwards with the first target spot as a terminal point, and the second-part angle-gain landing track comprises a first angle-gain circular-arc segment, an angle-holding linear segment and a second angle-gain circular-arc segment; a reverse angle-building track is determined with the wellhead as a starting point and the track midpoint as a terminal point, the reverse angle-building track comprises a plumb shaft segment, a reverse angle-building circular-arc segment, an angle-holding linear segment and an angle-dropping circular-arc segment, and the radius values of all the circular-arc segments range from 191 m to 286.5 m. According to the method for determining the medium-and-large-radius track of the two-dimensional small-pre-target-displacement horizontal well, the pre-target displacement is increased through reverse angle building, and the contradiction between the complex ground conditions and well location optimization of the horizontal well with the medium-and-large-radius track can be solved.

The invention relates to an oil-based lubricating anti-seize agent used in well drilling, and a preparation method and applications thereof. The oil-based lubricating anti-seize agent used in well drilling is prepared from 80 to 100 parts of a base oil, 10 to 20 parts of low fluorescence sulfonated bitumen, 10 to 20 parts of sodium succinate, 10 to 15 parts of a lubricant, 3 to 5 parts of a wetting dispersant, 2 to 4 parts of a promoter, 3 to 6 parts of nanoparticles, and 4 to 6 parts of a formate via mixing and stirring at a certain sequence. Compared with conventional products, the oil-basedlubricating anti-seize agent possesses following advantages: the stability is high, the lubricating performance is excellent, seizing resolving speed is high, preparation is convenient, the oil-basedlubricating anti-seize agent is more suitable for anti-seize and seizing resolving under high temperature stratum, and is convenient for on-site construction.

The invention discloses a plugging agent for a low-pressure leakage gas well, and a preparation method and an application method thereof. The plugging agent is prepared through the following steps: 1)stirring 0.3-0.7wt% of guanidine gum dry powder and clear water for mixing to form a mixture, and stirring at a constant temperature for 45-60 min; 2) adding 2-5% of calcium carbonate powder of whichthe particle size is 1000-2000 meshes into formed guanidine gum liquid after mixing, and stirring at the constant temperature for 20-30 min; 3) adding 1-3% of a polyvinyl alcohol fiber of which the length is 6-10 mm and the diameter is 20 Am into mixed liquid, and stirring at the constant temperature for 20-30 min; 4) adding 0.3-0.5% of an expanded particle of which the particle size is 1-3 mm into the mixed liquid, and stirring at the constant temperature for 1-3 min; 5) adding 0.3-0.5% of an expanded particle of which the particle size is 0.025-0.425 mm into the mixed liquid, and stirring at the constant temperature for 1-3 min to obtain the plugging agent for the low-pressure leakage gas well. The plugging agent can be directly used for the well repairing and leaking stoppage construction of the leakage gas well, and technical support is provided for a well repairing field well control operation; in addition, the plugging agent is simple in plug removal measure, and plug removal can be carried out through the injection of a plugging remover.

The invention discloses a bidirectional screw-type while-drilling well wall shaper. The bidirectional screw-type while-drilling well wall shaper comprises a shaper body and further comprises a femalethread and a male thread which are arranged at the two ends of the shaper body correspondingly, at least three sets of spiral bodies are arranged on the shaper body at intervals, spiral structureson the positions, close to the two ends of the shaper body correspondingly, of the two sets of spiral bodiesin the at least three sets of spiral bodies are arranged in reverse, each set of spiral bodies is composed of at least three spiral bladeswhich are distributed in parallel and have spiral angles of 10 to 45 degrees with the center line of the shaper body, the outer diameters of one of the spiralblades on the corresponding set of the spiral bodies are larger than those of other spiral blades on the corresponding set of the spiral bodies to show the eccentric structures, and diameter retaining teeth and cutting teeth are arranged at the centers of the tops of the spiral blades and the edges of the tops of one sides of the spiral blades, at the eccentric positions, on the spiral bodies atintervals correspondingly. According to the bidirectional screw-type while-drilling well wall shaper, while-drilling downwards can be achieved, a well wall is shaped while drilling operation is conducted, the drilling operation time is not increased, and the well wall can be shaped once again when back reaming is conducted.

The invention discloses a reducing reamer which comprises a reamer body, a tricone bit, a fixed cone and a turnover cone, wherein the tricone bit is connected with the front end of the reamer body; the fixed cone is arranged at the middle part of the reamer body through a connecting seat plate; the turnover cone is arranged at the tail part of the reamer body through a seat plate; the tail end of the turnover cone is fixedly connected with a turning plate; the turning plate extends to form downward wing plates corresponding to the two sides of the turnover cone; the two wing plates are separately in hinge joint with fixing plates arranged on the two sides of the turnover cone in advance; a positioning plate is arranged on the seat plate corresponding to the turning plate of the turnover cone; and a connecting disc is arranged on one side of the seat plate corresponding to the tail part of the reamer body. In the invention, during pipeline crossing with complex formation and limited construction site, the turnover cone in reaming drilling rotates around the hinge pin of the turning plate under the effect of rock-soil resistance in the advancing direction, and the cutting diameter is increased; and for retreating, the turnover cone rotates to the initial position under the frictional resistance of the hole wall rock and soil, the diameter of the reducing reamer is reduced, and thus the risk of tool sticking in the retreating process is lowered.

The invention relates to the technical field of rock drilling PDC drill bits, in particular to an active anti-sticking PDC drill bit with a rotary rock breaking device. The active anti-sticking PDC drill bit comprises a drill bit body with a cutter head, wherein a plurality of drill bit blades are arranged on the cutter head; an outer flowing channel on the side edge of the cutter head is formed among the drill bit blades; a communicating inner flowing channel for fluid to pass through is arranged in the cutter head and the drill bit body; the fluid flows into the inner flowing channel from the tail end of the drill bit body, passes through the drill bit body and the cutter head, and then flows out from an outlet at the front end of the cutter head; the rotary rock breaking device is arranged in the outer flowing channel of the cutter head; the rotary rock breaking device comprises an impeller and a rotating part; the impeller is arranged in the inner flowing channel of the cutter head; the rotating part penetrates through the side edge of the cutter head; the tail of the rotating part is inserted into the impeller; the head of the rotating part is exposed out of the outer flowingchannel; and the rotating part is driven to rotate by the impeller when the fluid flows through the inner flowing channel of the cutter head.

The invention relates to a method and special tool for sand flushing, and belongs to the technical field of well repairing work. The method and special tool for sand flushing are suitable for sand flushing construction of a pitshaft of an oil-gas well. The special tool for sand flushing comprises an outer pipe and a sand flushing inner pipe. The outer pipe is formed by sequentially connecting an oil pipe, a suspension pup joint and a rotary outer cylinder in a threaded mode. The sand flushing inner pipe is formed by sequentially connecting a sealing pup joint, a flushing pipe, a rotary inner cylinder and a drill bit in a threaded mode. According to the method and special tool for sand flushing, the annular space between the flushing pipe and the outer pipe is sealed through the sealing pup joint, a sand flushing fluid circulating channel between the outer pipe and the sand flushing inner pipe is established, and direct-circulating and reverse-circulating sand flushing construction in the sliding state of the flushing pipe is achieved; and rotating power for matching between the outer pipe and the ground is transmitted through the rotary inner cylinder and the rotary outer cylinder, the sand flushing drill bit is driven to rotate, and thus the rotary-drilling sand flushing construction requirement under a complex well condition is met.

The invention relates to a controller for realizing full-rotation composite orientation of a drill stem, which comprises an upper joint, an upper cylinder, an upper TC bearing sealing retainer ring, an upper TC bearing moving component, an upper string bearing, an upper string bearing inner retainer ring, an upper string bearing outer retainer ring, a sealing ring, a control screw, a clutch shell, a reset spring A, a clutch conversion cylinder, a spline shell, a spline sleeve, a mandrel and a reset spring B, the lower TC bearing moving assembly comprises a lower TC bearing inner retainer ring, a lower string bearing, a lower TC bearing moving assembly and a lower end cover. A circumferential sliding groove is formed in the outer wall of the upper end of the clutch conversion cylinder, and the control screw is matched with the sliding groove of the clutch conversion cylinder to control the clutch state and the clutch state of the clutch conversion cylinder. When the clutch conversion cylinder is in a closed state, the clutch conversion cylinder is matched with the spline housing, the drilling tool conducts composite drilling, when the clutch conversion cylinder is in a separated state, the clutch conversion cylinder is matched with the spline housing in a separated mode, and the drilling tool conducts sliding drilling.

The invention provides an anti-drill-sticking PDC drill bit, and belongs to a rotary-drilling drill bit structure for petroleum and geology. The anti-drill-sticking PDC drill bit includes a drill bitbody and a joint, wherein the drill bit body includes blades and a gauge, and PDC teeth are brazed to the blades. According to the key technology points, a ridge-shaped slope is arranged on the frontend surface of the gauge, a debris discharging groove is formed in a gauge body, and a small platform is arranged between the debris discharging groove and the ridge-shaped slope. The anti-drill-sticking PDC drill bit has the beneficial effects that the ridge-shaped slope structure on the front end surface of the gauge can push a large amount of falling blocks and rock debris to the two sides of the gauge and discharge the falling blocks and the rock debris to free space between the blades, and the risk of drill sticking is greatly reduced; and the gauge body is provided with the debris discharging groove structure with a one-way outlet, when the falling blocks and the rock debris are stacked and squeezed in the debris discharging groove, the open slope structure enables the falling blocksand the rock debris to be discharged to a deeper opening position along with the slope under the action of squeezing force and enter the free space between the blades of the drill bit, and the drillsticking caused by accumulation of the rock debris and the falling blocks on the surface of the gauge is further avoided.

The invention discloses a casing running auxiliary tool for petroleum drilling. The casing running auxiliary tool comprises an L-shaped grouting pipe and a return pipe; the grouting pipe is in communication with the short edge of the return pipe through a bypass pipe, a reversing valve is arranged at the joint of the bypass pipe and the grouting pipe, the end of the short edge of the grouting pipeis open, and the end of the short edge of the return pipe is closed; and the casing running auxiliary tool further comprises a water feeding system used for pumping fluid into the grouting pipe. According to the casing running auxiliary tool for petroleum drilling, the problems that in the prior art, a direct grouting mode does not make full use of a time window of continuous operation, and meanwhile a wellhead of a drill floor is prone to being polluted are solved; and the purposes that interval windows are fully used for grouting in the continuous casing running operation process, static slurry supplementing frequency is reduced, and the wellhead of the drill floor is prevented from being polluted can be achieved.

The invention discloses a drill rod centralizer. The drill rod centralizer comprises a centralizing wing, an upward flow channel and a through hole, wherein a conical part is arranged in the through hole in a sealing fit mode, and the conical part is connected with the hole wall of the through hole through a first shear pin; the drill rod centralizer further comprises a sliding sleeve, the slidingsleeve is connected to the inner wall of the centralizer in a sealing mode, a one-way valve is arranged at the bottom of the sliding sleeve, and the sliding sleeve is connected with the centralizer through a second shear pin; a first pressurizing flow channel and a second pressurizing flow channel are formed in the inner wall of the centralizer, and a third pressurizing flow channel is further formed in a sliding push block; when the sliding sleeve moves downwards to a low stroke position, the upper end of the first pressurizing flow channel is located outside the sliding sleeve; when the sliding push block moves downwards to the low stroke position, the second pressurizing flow channel communicates with the third pressurizing flow channel; and a plurality of spiral blades are further arranged at the end, away from the pointed cone end, of the conical part. The drill rod centralizer is used for solving the problem that in the prior art, a drill rod centralizer is prone to mud drum andthen underground accidents are induced, and the purposes of providing a self-unblocking function for the drill rod centralizer and reducing the risk of jamming of a drill by the mud drum of the centralizer are achieved.