CN111322010A - High-precision and high-torque underground azimuth director - Google Patents
High-precision and high-torque underground azimuth director Download PDFInfo
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- CN111322010A CN111322010A CN202010307272.1A CN202010307272A CN111322010A CN 111322010 A CN111322010 A CN 111322010A CN 202010307272 A CN202010307272 A CN 202010307272A CN 111322010 A CN111322010 A CN 111322010A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000003921 oil Substances 0.000 claims description 125
- 239000010727 cylinder oil Substances 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 abstract description 22
- 239000010720 hydraulic oil Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 102100036850 C-C motif chemokine 23 Human genes 0.000 description 3
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- 239000011324 bead Substances 0.000 description 2
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- 239000007788 liquid Substances 0.000 description 2
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- 238000013519 translation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
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- 238000005086 pumping Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/204—Axial sliding means, i.e. for rotary support and axial guiding of nut or screw shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2059—Superposing movement by two screws, e.g. with opposite thread direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a high-precision and high-torque underground azimuth director, belonging to the technical field of oil and gas drilling underground tools. The device comprises an outer cylinder, an inner cylinder, an underground motor, an underground screw pump, an oil tank, a hydraulic cylinder and an output shaft; the method is characterized in that: an inner barrel is arranged in the outer barrel, a downhole motor is fixedly arranged in the inner barrel, and a downhole screw pump and an oil tank are arranged in the inner barrel below the downhole motor; a hydraulic cylinder and a double-helix transmission mechanism are fixedly arranged in the inner cylinder below the oil tank, an outer cylinder joint is arranged at the end head of the lower end of the outer cylinder in a threaded mode, and an output shaft is movably arranged in the lower end opening of the outer cylinder joint. The underground azimuth director can lock a working surface, so the controllability is strong, the double-helix transmission mechanism has high rotation precision and high output torque, so the underground azimuth director does not need to be drilled and can eliminate the fishtail phenomenon during orientation.
Description
Technical Field
The invention relates to a high-precision and high-torque underground azimuth director, belonging to the technical field of oil and gas drilling underground tools.
Background
Compared with the conventional drilling technology, the coiled tubing drilling technology has the advantages of safety, high efficiency, low cost and the like, is widely applied to the development of conventional and unconventional oil and gas wells abroad, and is just in the starting stage in the research of the coiled tubing drilling technology in China.
The coiled tubing drilling orientation device is a core tool in the coiled tubing drilling process, and because the coiled tubing belongs to a flexible tubular column and cannot be rotationally oriented from the ground, the orientation device needs to be applied, the direction of a well hole is controlled by adjusting the tool surface of a motor, and the technical level of track control in the coiled tubing drilling process is determined. The development of directional devices has gone through several stages, mechanical, hydraulic, electrical and electro-hydraulic control. At present, high-end orienting devices such as electro-hydraulic control and electric control are mainly adopted abroad, the orienting device can continuously rotate, has high efficiency and high precision, can eliminate the fishtail phenomenon of an orienting section and is beneficial to the extension of a horizontal section; the method can complete the directional drilling construction of the complex continuous pipes such as a horizontal well, a sidetrack horizontal well, an underbalanced drilling and the like. Although the existing hydraulic direction finder in China has the advantages of simple structure, convenience in operation and control and low cost, the existing hydraulic direction finder has poor precision, poor controllability and low torque, a locking device is lacked, a tool face needs to be adjusted at each time, a ratchet device is partially adopted, the rotation angle is fixed at each time and can not continuously rotate, the existing hydraulic direction finder is easily limited by the type of drilling fluid, and the existing hydraulic direction finder cannot be applied to drilling of two-phase or gas-phase drilling fluid.
Disclosure of Invention
The invention aims to: the high-precision high-torque underground azimuth director can continuously rotate the angle of a tool face, can lock the tool face when the angle of the tool face meets the requirement, has the characteristics of precise orientation, high output torque, no limitation of the type of drilling fluid, no need of pulling out for adjusting the tool face, effective control of the drilling direction of a coiled tubing and well track, and solves the problems that the existing orienting device is poor in precision and controllability when the tool face is adjusted, and the tool face needs to be pulled out each time.
The technical scheme of the invention is as follows:
a high-precision and high-torque underground azimuth director comprises an outer cylinder, an inner cylinder, an underground motor, an underground screw pump, an oil tank, a hydraulic cylinder and an output shaft; the method is characterized in that: an inner cylinder is arranged in the outer cylinder, and an upper joint is arranged in an internal thread of an upper end port of the inner cylinder; an underground motor is fixedly arranged in an inner cylinder below the upper joint, a cable is arranged in a center hole of the upper joint above the underground motor and is connected with the underground motor, an underground screw pump is arranged in the inner cylinder below the underground motor, and rotating shafts of the underground motor and the underground screw pump are connected with each other through a coupling; an oil tank is arranged in the inner cylinder below the underground screw pump; the oil tank is communicated with the underground screw pump; a hydraulic cylinder is fixedly arranged in the inner cylinder below the oil tank, and the underground screw pump and the oil tank are respectively communicated with the hydraulic cylinder; a double-screw transmission mechanism is arranged in the inner cylinder below the hydraulic cylinder, and the hydraulic cylinder is connected with the double-screw transmission mechanism through a thrust bearing group; an outer barrel joint is installed at the end head of the lower end of the outer barrel in a threaded mode, an output shaft is movably installed in the lower port of the outer barrel joint, a lower joint is installed above the output shaft, a hollow shaft is arranged in the output shaft below the lower joint through a thrust bearing and a freewheel clutch, one end of the hollow shaft penetrates through the lower joint to be connected with a double-helix transmission mechanism, an annular hydraulic cylinder is installed between the output shaft and the outer barrel joint, a locking sliding block is installed at the end head of a piston rod of the annular hydraulic cylinder, a locking fixing block is fixedly installed on.
The overrunning clutch is respectively and fixedly connected with the output shaft and the hollow shaft. Through holes are uniformly distributed on the circumference of the hollow shaft above the lower joint.
The locking sliding block and the locking fixed block are respectively annular bodies, the inner surface of the locking sliding block and the outer surface of the locking fixed block are respectively provided with a key groove and key teeth correspondingly, and the locking sliding block and the locking fixed block are in sliding connection through the matching of the key groove and the key teeth.
The output shaft be the siphonozooid, be provided with the assembly annular on the output shaft circumference, be provided with the connecting pin on the urceolus connects, through the cooperation sliding connection of assembly annular and connecting pin between output shaft and the urceolus connects, output shaft and urceolus connect between be equipped with wear-resisting packing ring.
The outer cylinder is fixedly connected with the outer cylinder joint and the lower joint through the fastening pin.
The double-screw transmission mechanism comprises a sleeve, a middle screw rod, an output screw rod, a fixing nut and a fixing cylinder, wherein the fixing nut is fixedly arranged in the fixing cylinder through an upper stop block and a lower stop block, the fixing nut is a tubular body, the middle screw rod is movably arranged in the fixing nut, one end of the middle screw rod extends to the outer end of the fixing nut, the sleeve is arranged on the middle screw rod extending to the outer end of the fixing nut, and the sleeve is connected with the middle screw rod in a sliding mode.
The middle screw rod is a cylinder, one end of the middle screw rod is provided with an assembling recess, a thrust bearing is arranged in the assembling recess, and a piston rod of the hydraulic cylinder is connected with the middle screw rod through the thrust bearing; the other end of middle screw rod is provided with the assembly blind hole, and the one end movable mounting of output screw rod is in the assembly blind hole, and the other end of output screw rod extends to the solid fixed cylinder outer end, the output screw rod be the reducing body, be close to down the output screw rod of dog on be equipped with limit bearing through the reducing circular bead.
The inner wall of the fixed nut is provided with nut spiral teeth, the outer surface circumference of the lower end of the middle screw rod is provided with screw rod outer spiral teeth, the inner wall of the assembly blind hole corresponding to the screw rod outer spiral teeth is provided with screw rod inner spiral teeth, and the outer surface circumference of the output screw rod is provided with output screw rod spiral teeth; the middle screw rod is meshed with the fixed nut through the matching of the external screw teeth of the screw rod and the screw teeth of the nut, the middle screw rod is meshed with the output screw rod through the matching of the internal screw teeth of the screw rod and the screw teeth of the output screw rod, and the output screw rod is connected with the hollow shaft. The output screw rod above the hollow shaft is provided with a fixed block, the fixed block is fixedly connected with the fixed cylinder, and the fixed block is movably connected with the output screw rod and the hollow shaft.
The hydraulic cylinder consists of a piston, a piston rod, a cylinder body and a return spring, and a buffer block is arranged on a lower port of the cylinder body; the piston is arranged in the cylinder body, so that the inner cavity of the piston cylinder body of the piston cylinder is divided into an upper oil cavity of the hydraulic cylinder and a lower oil cavity of the hydraulic cylinder, a piston rod is arranged at the bottom of the piston, and a return spring is arranged on the piston rod between the piston and the buffer block. One end of the piston rod extends to the lower part of the buffer block.
An oil tank oil outlet channel is arranged between the underground screw pump and the inner wall of the inner cylinder; an oil feeding cavity oil duct is arranged between the oil tank and the inner wall of the inner barrel, and the oil tank is communicated with an oil inlet of the underground screw pump through an oil outlet of the oil tank and an oil outlet channel of the oil tank.
The upper end of the hydraulic cylinder body is provided with a hydraulic cylinder upper oil cavity inlet, and the lower end of the hydraulic cylinder body is provided with a hydraulic cylinder lower oil cavity inlet; an oil tank communication hole is formed in the bottom of the oil tank and is communicated with a hydraulic cylinder lower oil cavity inlet through a lower oil cavity oil duct; the bottom of the underground screw pump is provided with a screw pump oil outlet, and the screw pump oil outlet of the hydraulic cylinder is communicated with the inlet of the hydraulic cylinder oil cavity through an oil passage of the oil cavity.
The fixed block, the fixed cylinder and the lower connector are respectively provided with an annular hydraulic cylinder oil return channel, the annular hydraulic cylinder oil return channels on the fixed block and the lower connector are communicated through a communicating pipe, one end of the annular hydraulic cylinder oil return channel is communicated with the annular hydraulic cylinder, and the other end of the annular hydraulic cylinder oil return channel is communicated with the lower oil cavity oil duct.
And a slurry flow channel is arranged between the inner cylinder and the inner wall of the outer cylinder.
Compared with the prior art, the invention has the beneficial effects that:
1) according to the invention, the piston rod of the hydraulic cylinder is controlled to axially reciprocate by controlling the on-off of hydraulic oil, and the translation is changed into rotation through the double-helix transmission mechanism, so that the unidirectional rotation of the angle of the tool surface can be controlled, the tool surface is locked through the locking mechanism after the tool surface reaches a preset tool surface or when the middle screw rod reaches the stroke limit, and meanwhile, the middle screw rod returns to prepare for next orientation. Compared with the same type of device, the invention has high rotation precision and high output torque because of the double-helix transmission mechanism, so that the drilling is not needed during the orientation, and the fishtail phenomenon can be eliminated.
2) The invention can make the output screw of the double-helix transmission mechanism transmit the torque to the output shaft in one direction through the one-way torque transmission mechanism, so that the tool can return, and further the tool can continuously rotate in the same direction to work.
3) The invention contains a locking mechanism which can lock the working surface, so the controllability is strong, meanwhile, the invention is not limited by the type of drilling fluid, can lock the tool surface at any time, has high locking efficiency and high orientation precision, and is convenient to control.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is an enlarged view of the structure at B in FIG. 1;
FIG. 4 is an enlarged view of the structure at C in FIG. 1;
fig. 5 is an enlarged schematic view of the structure at D in fig. 1.
In the figure: 1. an outer cylinder, 2, an inner cylinder, 3, a downhole motor, 4, a downhole screw pump, 5, an oil tank, 6, a hydraulic cylinder, 7, a thrust bearing, 8, an output shaft, 9, an assembly block, 10, an upper joint, 11, a cable, 12, a coupling, 13, an oil outlet of the oil tank, 14, an oil outlet channel of the oil tank, 15, a sleeve of the hydraulic cylinder, 16, a buffer block, 17, a piston, 18, a piston rod, 19, a return spring, 20, an upper oil chamber of the hydraulic cylinder, 21, a lower oil chamber of the hydraulic cylinder, 22, an upper oil chamber inlet of the hydraulic cylinder, 23, an upper oil chamber, 24, a lower oil chamber inlet of the hydraulic cylinder, 25, a lower oil passage of the hydraulic cylinder, 26, a lower oil passage inlet, 27, a lower oil chamber oil passage, 28, a sleeve, 29, a middle screw, 30, an output screw, 31, a fixing nut, 32, a fixing cylinder, 33, an upper stop, 34, 38. the hydraulic control device comprises screw internal spiral teeth, 39, output screw spiral teeth, 40, an outer cylinder joint, 41, a lower joint, 42, a connecting pin, 43, a thrust bearing, 44, an overrunning clutch, 45, a hollow shaft, 46, a fixed block, 47, a through hole, 48, a fastening pin, 49, an annular hydraulic cylinder, 50, a locking sliding block, 51, a locking fixed block, 52, an annular hydraulic cylinder oil return channel, 53, a communicating pipe, 54, thrust bearings B, 55, a return spring, 56 and an annular hydraulic cylinder oil inlet channel.
Detailed Description
The high-precision and high-torque underground azimuth director (tool) comprises an outer cylinder 1, an inner cylinder 2, an underground motor 3, an underground screw pump 4, an oil tank 5, a hydraulic cylinder 6 and an output shaft 8; an inner cylinder 2 is arranged in the outer cylinder 1.
An upper joint 10 is arranged in an internal thread of an upper end port of the inner cylinder 1; the underground motor 3 is fixedly arranged in a center hole of the upper joint 10, a cable 11 is arranged in the center hole of the upper joint 10 above the underground motor 3, one end of the cable 11 is connected with a ground power supply, and the other end of the cable 11 is connected with the underground motor 3 so as to provide power for the underground motor 3 during working. An underground screw pump 4 is arranged in the inner cylinder 2 below the underground motor 3, and the rotating shafts of the underground motor 3 and the underground screw pump 4 are connected with each other through a coupling 12; an oil tank oil outlet channel 14 is arranged between the downhole screw pump 4 and the inner cylinder 2, and an oil tank 5 is arranged in the inner cylinder 2 below the downhole screw pump 4; the oil tank 5 is communicated with an oil inlet of the down-hole screw pump 4 through an oil tank outlet 13 and an oil tank outlet channel 14 at the top of the oil tank; the inner cylinder 2 below the oil tank 5 is internally and fixedly provided with a hydraulic cylinder 6 through a hydraulic cylinder sleeve 15 and a buffer block 16. The hydraulic cylinder 6 consists of a piston 17, a piston rod 18, a cylinder body and a return spring 19, and a buffer block 16 is hermetically arranged on the lower port of the cylinder body; a piston 17 is arranged in the cylinder body, and the piston 17 is connected with the inner wall of the cylinder body in a sliding and sealing manner; therefore, the inner cavity of the cylinder body is sealed and divided by the piston 17 to form an upper oil cavity 20 and a lower oil cavity 21 of the hydraulic cylinder, a piston rod 18 is fixedly arranged on the piston 17, and a return spring 19 is arranged on the piston rod 18 between the piston 17 and the buffer block 16; one end of piston rod 18 extends through bumper 16 to below bumper 16.
One side of the upper end of the cylinder body of the hydraulic cylinder 6 is provided with a hydraulic cylinder oil cavity inlet 22, an oil cavity oil duct 23 is arranged between the hydraulic cylinder 6 corresponding to the hydraulic cylinder oil cavity inlet 22 and the inner wall of the inner cylinder 2, and the oil outlet of the underground screw pump 4 is communicated with the hydraulic cylinder oil cavity inlet 22 through the oil cavity oil duct. A hydraulic cylinder lower oil cavity inlet 24 is formed in one side of the lower end of the cylinder body 6 of the hydraulic cylinder; a hydraulic cylinder lower oil duct 25 is arranged on the cylinder body of the hydraulic cylinder 6 corresponding to the hydraulic cylinder lower oil chamber inlet 24, and a lower oil duct inlet 26 is arranged at the upper end of the hydraulic cylinder lower oil duct 2; a lower oil cavity oil channel 27 is arranged between the hydraulic cylinder 6 corresponding to the lower oil channel inlet 26 and the inner wall of the inner cylinder 2; the bottom of the oil tank 5 is provided with an oil tank communication hole which is communicated with the hydraulic cylinder lower oil cavity inlet 24 through a lower oil cavity oil duct 27, a lower oil duct inlet 26 and a hydraulic cylinder lower oil duct 25.
A double-helix transmission mechanism is arranged in the inner cylinder 2 below the hydraulic cylinder 6, the double-helix transmission mechanism consists of a sleeve 28, an intermediate screw 29, an output screw 30, a fixing nut 31 and a fixing cylinder 32, the fixing nut 31 is fixedly arranged in the fixing cylinder 32 through an upper stop block 33 and a lower stop block 34, the fixing nut 31 is a tubular body, and the intermediate screw 29 is movably arranged in the fixing nut 31; the middle screw 29 is a cylinder, an assembly recess is arranged at one end of the middle screw 29, a thrust bearing group is arranged in the assembly recess, the thrust bearing group is composed of a thrust bearing A7 and a thrust bearing B54, the thrust bearing A7 and the thrust bearing B54 are arranged in an up-down mode, one end of the middle screw 29 extends to the outer end of the fixing nut 31, a sleeve 28 is arranged on the middle screw 29 extending to the outer end of the fixing nut 31, and the sleeve 28 is connected with the middle screw 29 in a sliding mode.
The piston rod 18 of the hydraulic cylinder 6 is connected with the middle screw 29 through a thrust bearing group; the other end of middle screw 29 is provided with the assembly blind hole, and the one end movable mounting of output screw 30 is in the assembly blind hole, and the other end of output screw 30 extends to the outer end of solid fixed cylinder 32, and output screw 30 is the reducing body, is equipped with limit bearing 35 through the reducing circular bead on the output screw 30 that closes on lower dog 34.
The inner wall of a fixed nut 31 of the double-screw transmission mechanism is provided with nut spiral teeth 36, the outer circumference of the lower end of the middle screw 29 is provided with screw outer spiral teeth 37, the inner wall of an assembly blind hole corresponding to the screw outer spiral teeth 37 is provided with screw inner spiral teeth 38, and the outer circumference of the output screw 30 is provided with output screw spiral teeth 39; the intermediate screw 29 is engaged with the fixed nut 31 through the engagement of the screw outer helical teeth 37 and the nut helical teeth 36 to form a first-stage helical pair (outer helical pair), and the intermediate screw 29 is engaged with the output screw 30 through the engagement of the screw inner helical teeth 38 and the output screw helical teeth 39 to form a second-stage helical pair (inner helical pair). The output screw 30 can only rotate in the circumferential direction and cannot move axially, the middle screw 29 of the double-helix transmission mechanism can rotate along the central line of the middle screw 29 of the double-helix transmission mechanism while translating axially along the spiral line of the fixing nut 31, the output screw 30 of the double-helix transmission mechanism rotates in the middle screw 29 of the double-helix transmission mechanism, and the hollow shaft 45 and the output screw 30 synchronously rotate together through a spline. The double-helix transmission mechanism is arranged in the same direction (namely, the screw threads of the two-stage helical pair rotate in the same direction and rotate rightwards), and the lead of the outer helical pair is greater than that of the inner helical pair, so the double-helix transmission mechanism has the characteristics of high torque and high precision.
The assembly blocks 9 are uniformly distributed in the annular space between the outer cylinder 1 and the inner cylinder 2 of the underground azimuth director in a spiral mode, the assembly blocks 9 are used for mutually connecting the outer cylinder 1 and the inner cylinder 2 and centering the inner cylinder 2, keeping the annular space between the outer cylinder 1 and the inner cylinder 2 smooth and simultaneously protecting an underground motor 3, an underground screw pump 4, an oil tank 5, a hydraulic cylinder 6, a double-spiral transmission mechanism and the like.
An outer cylinder joint 40 is arranged on the port of the outer cylinder 1 arranged below the double-screw transmission mechanism in a threaded manner; an output shaft 8 is movably mounted in a lower port of the outer cylinder joint 40, the output shaft 8 is a tubular body, an assembly ring groove is formed in the circumference of the output shaft 8, a connecting pin 42 is arranged on the outer cylinder joint 40, the output shaft 8 and the outer cylinder joint 40 are in sliding connection through the assembly ring groove and the connecting pin 42 in a matched mode, and a wear-resistant gasket is mounted between the output shaft 8 and the outer cylinder joint 40 to reduce abrasion between the output shaft 8 and the outer cylinder joint 40.
The output shaft 8 is a reducing tubular body, a lower joint 41 is arranged above the output shaft 8, and a hollow shaft 45 is arranged in the output shaft 8 below the lower joint 41; a one-way torque transmission mechanism is arranged between the output shaft 8 and the hollow shaft 45 and consists of a plurality of overrunning clutches 44, (the overrunning clutches are commercially available, namely CKB8 type wedge overrunning clutches which consist of an inner ring, an outer ring, wedges and springs, and when the outer ring of the CKB8 type wedge overrunning clutch is active (rotates anticlockwise), when the outer ring of the CKB8 type wedge overrunning clutch rotates anticlockwise)
The overrunning clutch is engaged; when in use
Override ofThe clutch overruns. When the inner ring is active (clockwise rotation): when in use
The overrunning clutch is engaged; when in use
Overrunning clutch overrunning). The overrunning clutches 44 are arranged in an axial direction of the hollow shaft 45, thrust bearings 43 are mounted on the hollow shaft 45 at the upper end and the lower end of the one-way torque transmission mechanism, the overrunning clutches 44 are respectively and fixedly connected with the output shaft 8 and the hollow shaft 45, namely, the hollow shaft 45 is connected with an inner ring of the overrunning clutch through splines, and the output shaft 8 is connected with an outer ring of the overrunning clutch through splines. When the one-way torque transmission mechanism works, the output shaft 8 can be driven to rotate circumferentially along one direction only through the one-way torque transmission mechanism under the action of the hollow shaft 45. One end of the hollow shaft 45 penetrates through the lower joint 41 to be connected with the output screw 30 of the double-helix transmission mechanism, a fixing block 46 is arranged on the hollow shaft 45 and the output screw 30 at the joint, the fixing block 46 is fixedly connected with the fixed cylinder 32, and the fixing block 46 is connected with the hollow shaft 45 and the output screw 30 in a sliding mode. Through holes 47 are uniformly distributed on the circumference of the hollow shaft 45 between the fixing block 46 and the lower joint 41
The outer cylinder 1 is fixedly connected with the outer cylinder joint 40 and the lower joint 41 through a fastening pin 48; the lower joint 41 is hermetically connected with the outer cylinder 1.
An annular hydraulic cylinder 49 is arranged between the output shaft 8 and the outer cylinder joint 40, a return spring 55 is arranged on a piston rod of the annular hydraulic cylinder 49, a locking sliding block 50 is arranged at the end of the piston rod of the annular hydraulic cylinder 49, a locking fixing block 51 is fixedly arranged on the outer surface of the output shaft 8 corresponding to the locking sliding block 50, the locking sliding block 50 and the locking fixing block 54 are respectively annular bodies, a key groove and key teeth are respectively and correspondingly arranged on the inner surface of the locking sliding block 50 and the outer surface of the locking fixing block 51, and the locking sliding block 50 and the locking fixing block 51 are in sliding connection through the. The locking sliding block 50 is connected with the inner wall of the outer cylinder joint 40 in a sliding mode through the matching of key grooves and key teeth, and the locking sliding block 50 and the locking fixing block 54 form a locking mechanism of the underground azimuth director.
An annular hydraulic cylinder oil return channel 52 and an annular hydraulic cylinder oil inlet channel 56 are respectively arranged on a fixing block 46, a fixing cylinder 32 and a lower joint 41 of the underground azimuth aligner, the annular hydraulic cylinder oil return channel 52 and the annular hydraulic cylinder oil inlet channel 56 on the fixing block 46 and the lower joint 41 are respectively communicated through a communicating pipe 53, one end of the annular hydraulic cylinder oil return channel 52 is communicated with an oil return hole of an annular hydraulic cylinder 49, the other end of the annular hydraulic cylinder oil return channel 52 is communicated with a lower oil cavity oil channel 27, one end of the annular hydraulic cylinder oil inlet channel 56 is communicated with an oil inlet hole of the annular hydraulic cylinder 49, and the other end of the annular hydraulic cylinder oil inlet channel 56 is communicated with an upper oil cavity oil channel 23, so that working power is.
The underground azimuth director is arranged on a continuous pipe, drilling liquid enters an annular space between an inner cylinder 2 and the inner wall of an outer cylinder 1 from the continuous pipe to form a slurry flow channel to move downwards during working, the drilling liquid is prevented from moving downwards to the lower connector 41 due to the sealing connection between the lower connector 41 and the outer cylinder 1, then enters a hollow shaft 45 through a through hole 47, then passes through an output shaft 8, a deflecting tool and finally acts on a drill bit to perform normal drilling, and the locking sliding block 50 and the locking fixing block 54 at the moment keep a locking state.
When the rotation and orientation are needed in the drilling process, firstly, the power is supplied to the underground motor 3 through the cable 11, the underground motor drives the underground screw pump 4 to work through the coupler, and therefore hydraulic oil in the oil tank 5 is extracted to enter the hydraulic cylinder 6 and the annular hydraulic cylinder 49. When hydraulic oil enters the upper hydraulic cylinder oil chamber 20 of the hydraulic cylinder 6, the piston 17 and the piston rod 18 are driven to move downwards, in the process, the return spring 19 on the piston rod 18 is compressed, and the hydraulic oil in the lower hydraulic cylinder oil chamber 21 flows back to the oil tank 5 through the lower hydraulic cylinder oil chamber inlet 24, the lower hydraulic cylinder oil chamber 25, the lower oil chamber inlet 26 and the lower oil chamber 27 under the extrusion of the piston 17. The piston rod 18 moves downwards to drive the middle screw 29 of the double-helix transmission mechanism to move downwards; because the inner wall of the fixed nut 31 of the double-screw transmission mechanism is provided with nut helical teeth 36, the outer circumference of the lower end of the middle screw 29 is provided with screw outer helical teeth 37, the inner wall of the assembly blind hole corresponding to the screw outer helical teeth 37 is provided with screw inner helical teeth 38, and the outer circumference of the output screw 30 is provided with output screw helical teeth 39; the intermediate screw 29 is engaged with the fixing nut 31 by the engagement of the screw external screw thread 37 and the nut screw thread 36, and the intermediate screw 29 is engaged with the output screw 30 by the engagement of the screw internal screw thread 38 and the output screw thread 39. The middle screw 29 rotates clockwise under the action of the fixing nut 31, the middle screw 29 rotates clockwise and drives the output screw 30 to rotate counterclockwise, and the output screw 30 is in key connection with the hollow shaft 45, so that the hollow shaft 45 is driven to rotate.
When the hydraulic oil enters the upper hydraulic cylinder oil chamber 20 of the hydraulic cylinder 6, part of the hydraulic oil enters the oil chamber of the annular hydraulic cylinder 49 through the annular hydraulic cylinder oil inlet channel 56, the piston rod of the annular hydraulic cylinder 49 is pushed to descend, and therefore the locking sliding block 50 is pushed to descend, and the locking sliding block 50 is gradually separated from the meshing state with the locking fixed block 54. After the locking slide block 50 is disengaged from the locking fixed block 54, the locking state of the output shaft 8 is released, and the hollow shaft 45 rotates and the hollow shaft 45 is combined with the output shaft 8 through the overrunning clutch 44, so that the output shaft 8 is driven to rotate according to a set angle, and the unidirectional rotation of the angle of the tool surface (deflecting tool) is controlled through the output shaft 8.
When the tool face rotates in one direction to a set angle, the power supply of the cable 11 is cut off, the underground motor 3 does not work any more, and the underground screw pump 4 stops pumping oil. At this time, the piston rod of the annular hydraulic cylinder 49 is reset under the action of the return spring 55; the piston rod 18 of the hydraulic cylinder 6 is reset under the action of the reset spring 19, the middle screw 29 is driven to move upwards in the reset process of the piston rod 18, so that the output screw 30 and the hollow shaft 45 are driven to rotate reversely, and the output shaft 8 does not rotate when the hollow shaft 45 rotates reversely because the one-way torque transmission mechanism is arranged between the hollow shaft 45 and the output shaft 8.
In the process of resetting the piston rod of the annular hydraulic cylinder 49 under the action of the return spring 55; the piston rod of the annular hydraulic cylinder 49 drives the locking slide block 50 and the locking fixed block 54 to form an engaged state again, so that the rotation angle of the output shaft 8 is locked.
The underground direction director controls the piston 17 of the hydraulic cylinder 6 to axially reciprocate by controlling the on-off of hydraulic oil, and changes the translation into rotation through the double-helix transmission mechanism, so that the unidirectional rotation of the angle of the tool surface can be controlled, the tool surface is locked through the locking mechanism after reaching a preset tool surface or when the middle screw rod reaches the stroke limit, and meanwhile, the middle screw rod 29 returns to prepare for next direction. Compared with the prior devices of the same type, the underground azimuth director can lock the working surface, so that the controllability is strong, meanwhile, the underground azimuth director is not limited by the type of drilling fluid, the tool surface can be locked at any time, the locking efficiency is high, the orientation precision is high, and the control is convenient. Meanwhile, the double-screw transmission mechanism is included, so that the rotation precision is high, the output torque is high, the drill does not need to be pulled down during the orientation, and the fishtail phenomenon can be eliminated. The underground azimuth director enables an output screw 30 of a double-helix transmission mechanism to transmit torque to an output shaft 8 in a one-way mode through a one-way torque transmission mechanism, so that a tool can return, and the tool can continuously rotate in the same direction to work.
Claims (10)
1. A high-precision and high-torque underground azimuth director comprises an outer cylinder (1), an inner cylinder (2), an underground motor (3), an underground screw pump (4), an oil tank (5), a hydraulic cylinder (6) and an output shaft (8); the method is characterized in that: an inner cylinder (2) is arranged in the outer cylinder (1), and an upper joint (10) is arranged in an internal thread of an upper end port of the inner cylinder (2); an underground motor (3) is fixedly arranged in an inner cylinder (2) below an upper joint (10), a cable (11) is arranged in a center hole of the upper joint (10) above the underground motor (3), the cable (11) is connected with the underground motor (3), an underground screw pump (4) is arranged in the inner cylinder (2) below the underground motor (3), and rotating shafts of the underground motor (3) and the underground screw pump (4) are connected with each other through a coupling (12); an oil tank (5) is arranged in the inner cylinder (2) below the underground screw pump (4); the oil tank (5) is communicated with the underground screw pump (4); a hydraulic cylinder (6) is fixedly arranged in the inner cylinder (2) below the oil tank (5), and the underground screw pump (4) and the oil tank (5) are respectively communicated with the hydraulic cylinder (6); a double-helix transmission mechanism is arranged in the inner cylinder (2) below the hydraulic cylinder (6), and the hydraulic cylinder (6) is connected with the double-helix transmission mechanism through a thrust bearing group; an outer cylinder joint (40) is installed on the lower end of an outer cylinder (1) in a threaded mode, an output shaft (8) is movably installed in a lower port of the outer cylinder joint (40), a lower joint (41) is installed above the output shaft (8), a hollow shaft (45) is installed in the output shaft (8) below the lower joint (41) through a thrust bearing (43) and an overrunning clutch (44), one end of the hollow shaft (45) penetrates through the lower joint (41) to be connected with a double-spiral transmission mechanism, an annular hydraulic cylinder (49) is installed between the output shaft (8) and the outer cylinder joint (40), a locking sliding block (50) is installed on the end of a piston rod of the annular hydraulic cylinder (49), a locking fixing block (51) is fixedly installed on the outer surface of the output shaft (8) corresponding to the locking sliding.
2. A high accuracy, high torque downhole azimuth finder as claimed in claim 1, wherein: the overrunning clutch (44) is respectively and fixedly connected with the output shaft (8) and the hollow shaft (45); through holes (47) are uniformly distributed on the circumference of the hollow shaft (45) above the lower joint (41); the hydraulic cylinder (6) consists of a piston (17), a piston rod (18), a cylinder body and a return spring (19), and a buffer block (16) is arranged on the lower port of the cylinder body; a piston (17) is arranged in the cylinder body, the piston (17) divides the inner cavity of the cylinder body of the piston cylinder (6) into an upper oil cavity (20) of the hydraulic cylinder and a lower oil cavity (21) of the hydraulic cylinder, a piston rod (18) is fixedly arranged on the piston (17), and a return spring (19) is arranged on the piston rod (18) between the piston (17) and the buffer block (16); one end of the piston rod (18) extends to the lower part of the buffer block (16); an oil tank oil outlet channel (14) is arranged between the underground screw pump (4) and the inner wall of the inner cylinder (2); an upper oil cavity oil duct (23) is arranged between the oil tank (6) and the inner wall of the inner barrel (2), and the oil tank (6) is communicated with an oil inlet of the down-hole screw pump (4) through an oil outlet (13) of the oil tank and an oil outlet duct (14) of the oil tank.
3. A high accuracy, high torque downhole azimuth finder as claimed in claim 1, wherein: the locking sliding block (50) and the locking fixing block (51) are annular bodies respectively, the inner surface of the locking sliding block (50) and the outer surface of the locking fixing block (51) are correspondingly provided with key grooves and key teeth respectively, and the locking sliding block (50) is in sliding connection with the locking fixing block (51) through the matching of the key grooves and the key teeth.
4. A high accuracy, high torque downhole azimuth finder as claimed in claim 2, wherein: output shaft (8) be the siphonozooid, be provided with the assembly annular on output shaft (8) circumference, be provided with connecting pin (42) on the outer cylinder joint (40), through the cooperation sliding connection of assembly annular and connecting pin (42) between output shaft (8) and outer cylinder joint (40), output shaft (8) and outer cylinder joint (40) between be equipped with wear-resisting packing ring.
5. A high accuracy, high torque downhole azimuth finder as claimed in claim 1, wherein: the double-helix transmission mechanism is composed of a sleeve (28), a middle screw (29), an output screw (30), a fixing nut (31) and a fixing cylinder (32), the fixing nut (31) is fixedly arranged in the fixing cylinder (32) through an upper stop block (33) and a lower stop block (34), the fixing nut (31) is a tubular body, and the middle screw (29) is movably arranged in the fixing nut (31); one end of the middle screw rod (29) extends to the outer end of the fixing nut (31), a sleeve (28) is arranged on the middle screw rod (29) extending to the outer end of the fixing nut (31), and the sleeve (28) is connected with the middle screw rod (29) in a sliding mode.
6. A high accuracy, high torque downhole azimuth finder according to claim 5, wherein: the middle screw rod (29) is a cylinder, one end of the middle screw rod (29) is provided with an assembly recess, a thrust bearing group is arranged in the assembly recess, and a piston rod (18) of the hydraulic cylinder (6) is connected with the middle screw rod (29) through the thrust bearing group; the other end of middle screw rod (29) is provided with the assembly blind hole, and the one end movable mounting of output screw rod (30) is in the assembly blind hole, and the other end of output screw rod (30) extends to solid fixed cylinder (32) outer end, output screw rod (30) be the reducing body, be close to output screw rod (30) of dog (34) down and go up through reducing shoulder and be equipped with spacing bearing (35).
7. A high accuracy, high torque downhole azimuth finder according to claim 5, wherein: the inner wall of the fixed nut (31) is provided with nut spiral teeth (36), the outer circumference of the lower end of the middle screw (29) is provided with screw outer spiral teeth (37), the inner wall of the assembly blind hole corresponding to the screw outer spiral teeth (37) is provided with screw inner spiral teeth (38), and the outer circumference of the output screw (30) is provided with output screw spiral teeth (39); the middle screw (29) is meshed with the fixed nut (31) through the matching of screw external spiral teeth (37) and nut spiral teeth (36), the middle screw (29) is meshed with the output screw (30) through the matching of screw internal spiral teeth (38) and output screw spiral teeth (39), and the output screw (30) is connected with the hollow shaft (45); a fixed block (46) is arranged on the output screw (30) above the hollow shaft (45), the fixed block (46) is fixedly connected with the fixed cylinder (32), and the fixed block (46) is movably connected with the output screw (30) and the hollow shaft (45); and annular hydraulic cylinder oil return channels (52) are respectively arranged on the fixing block (46), the fixing cylinder (32) and the lower joint (41).
8. A high accuracy, high torque downhole azimuth finder as claimed in claim 2, wherein: the upper end of the cylinder body of the hydraulic cylinder (6) is provided with a hydraulic cylinder upper oil cavity inlet (22), and the lower end of the cylinder body of the hydraulic cylinder (6) is provided with a hydraulic cylinder lower oil cavity inlet (24); an oil tank communication hole is formed in the bottom of the oil tank (5), and the oil tank communication hole is communicated with a hydraulic cylinder lower oil cavity inlet (24) through a lower oil cavity oil duct (27); the bottom of the underground screw pump (4) is provided with a screw pump oil outlet which is communicated with an oil cavity inlet (22) of the hydraulic cylinder through an oil cavity oil duct (23).
9. A high accuracy, high torque downhole azimuth finder as claimed in claim 7, wherein: the fixed block (46) is communicated with an annular hydraulic cylinder oil return channel (52) on the lower connector (41) through a communicating pipe (53), one end of the annular hydraulic cylinder oil return channel (52) is communicated with an oil return hole of the annular hydraulic cylinder (49), and the other end of the annular hydraulic cylinder oil return channel (52) is communicated with the lower oil cavity oil duct (27).
10. A high accuracy, high torque downhole azimuth finder as claimed in claim 1, wherein: and a slurry flow channel formed by an annular space is arranged between the inner cylinder (2) and the inner wall of the outer cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307272.1A CN111322010A (en) | 2020-04-17 | 2020-04-17 | High-precision and high-torque underground azimuth director |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010307272.1A CN111322010A (en) | 2020-04-17 | 2020-04-17 | High-precision and high-torque underground azimuth director |
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| Publication Number | Publication Date |
|---|---|
| CN111322010A true CN111322010A (en) | 2020-06-23 |
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ID=71168135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010307272.1A Pending CN111322010A (en) | 2020-04-17 | 2020-04-17 | High-precision and high-torque underground azimuth director |
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| Country | Link |
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| CN (1) | CN111322010A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508520A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | Director hydraulic integrated system for coiled tubing |
-
2020
- 2020-04-17 CN CN202010307272.1A patent/CN111322010A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114508520A (en) * | 2020-11-16 | 2022-05-17 | 中国石油化工股份有限公司 | Director hydraulic integrated system for coiled tubing |
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