CN108179980A - A kind of machinery tapered stabilizer - Google Patents

A kind of machinery tapered stabilizer Download PDF

Info

Publication number
CN108179980A
CN108179980A CN201810004180.9A CN201810004180A CN108179980A CN 108179980 A CN108179980 A CN 108179980A CN 201810004180 A CN201810004180 A CN 201810004180A CN 108179980 A CN108179980 A CN 108179980A
Authority
CN
China
Prior art keywords
wing plate
pin
shaft
cam
end cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810004180.9A
Other languages
Chinese (zh)
Inventor
江小三
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201810004180.9A priority Critical patent/CN108179980A/en
Publication of CN108179980A publication Critical patent/CN108179980A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B12/00—Accessories for drilling tools

Abstract

The present invention provides a kind of mechanical tapered stabilizers, are mainly made of top connection, pin, transmission shaft, shaft-like wing plate, lower contact, end cap, bidirectional cam, directive wheel, one-way cam and outer barrel.When putting tool-face or compound drilling, transmission shaft is rotated clockwise by the driving of top drilling tool, and shaft-like wing plate is withdrawn, and mechanical tapered stabilizer is equivalent to drilling string stabilizer.During slipping drilling, transmission shaft drives rotation counterclockwise by lower drilling tool, and shaft-like wing plate stretches out and imbeds the borehole wall, and helicoid hydraulic motor reaction torque is prevented to be communicated up, helicoid hydraulic motor untwisting angle is eliminated, helicoid hydraulic motor slipping drilling orientation is difficult during thoroughly solving directional well, horizontal well drilling.

Description

A kind of machinery tapered stabilizer
Technical field
Patent of the present invention belongs to oil drilling machine field, and in particular to a kind of machinery tapered stabilizer, as screw drill Tool kit is used for eliminating helicoid hydraulic motor untwisting angle, solves directional well, positive displacement drill for horizontal well slipping drilling orientation difficulty, carries Highly directional bit speed reduces directed drilling cost.
Background technology
During directional well, horizontal well drilling, adjusted usually using helicoid hydraulic motor and MWD/LWD instrument slips drilling Well track changes wellbore space drilling direction in other words, and therefore, directional drilling is also referred to as slipping drilling.During slipping drilling, spiral shell Plane updip direction where bar drill tool bent angle is known as tool-face, and plane updip direction where crooked hole bent angle is known as wellbore height Side, therebetween angle be known as tool face angle, therefore, tool-face is equal to wellbore flash and tool face angle sum of the two.
During slipping drilling, since the factors such as well track, drill assembly, bite type and mud property influence, different wells There is orientation difficulty in various degree in eye or same wellbore difference well section, in other words, tool-face is unstable, seriously affects slip and bores Into operating efficiency and bit speed.
Tool-face shakiness is mainly related with spiral drilling rig structure.When screw drill transmission shaft driving drill bit broken rock drilling, Helicoid hydraulic motor shell reaction torque drives helicoid hydraulic motor and the rotation counterclockwise of top drilling tool until reaction torque is by borehole wall mill resistance counteracting Only, helicoid hydraulic motor rotated counterclockwise by angle is called helicoid hydraulic motor untwisting angle by we.Therefore, it must take into consideration during orientation pendulum tool-face Helicoid hydraulic motor untwisting angle, in other words, tool-face are equal to the sum of wellbore flash, tool face angle and untwisting angle three.For certain specification For model helicoid hydraulic motor, when one timing of drilling fluid displacement, helicoid hydraulic motor output power is a definite value.During slipping drilling, such as Fruit uniformly send brill, and helicoid hydraulic motor output torque is stablized relatively, and untwisting angle is also stablized relatively, and therefore, tool-face is stablized relatively；If Increase (or reduction) bit pressure, helicoid hydraulic motor output torque increases (or reduction), and untwisting angle also increases (or reduction), therefore, tool Face is unstable.In fact, tool-face shakiness is caused by the variation of helicoid hydraulic motor untwisting angle.
According to situ of drilling well experience for many years, patent of the present invention proposes a kind of mechanical tapered stabilizer.Mechanical reducing is stablized Device is generally connected to helicoid hydraulic motor top, and when slipping drilling prevents helicoid hydraulic motor shell reaction torque from being communicated up.Due to screw drill It is shorter to have outer cover length, rigidity is larger, and therefore, helicoid hydraulic motor untwisting angle can be ignored.There is no helicoid hydraulic motor untwisting angle, work Tool face would not be unstable when helicoid hydraulic motor untwisting angle changes, therefore, it is difficult thoroughly to solve helicoid hydraulic motor slipping drilling orientation.
Patent of invention content
The purpose of patent of the present invention is to provide a kind of mechanical tapered stabilizer, is used for eliminating as helicoid hydraulic motor kit Helicoid hydraulic motor untwisting angle solves directional well, positive displacement drill for horizontal well slipping drilling orientation difficulty, improves directed drilling speed, drop Low directed drilling cost.
The specific technical solution that patent of the present invention uses is：
Mechanical tapered stabilizer mainly by top connection, pin, transmission shaft, shaft-like wing plate, lower contact, end cap, bidirectional cam, Directive wheel, one-way cam and outer barrel composition.
Top connection is mesoporous, thick-walled metal cylinder.Externally, top connection is cylinder, can be described as occlusion section, uses Upper, shackle operation is engaged in live binding clip.From the point of view of inside, top connection upper end is screw threads of petroleum drilling tools, is bored for connecting top Tool；It is drilling fluid runner below screw threads of petroleum drilling tools；Below drilling fluid runner or top connection lower end is special thread, for connecting Transmission shaft.
Transmission shaft is mesoporous, thick-walled metal axis.Externally, it is torque drive section in the middle part of transmission shaft, torque drive section Splined shaft or the equilateral cylinder of more ribs or Elliptic Cylinder or other shapes cylinder are may be designed to, for installing bidirectional cam, being oriented to Wheel and one-way cam, one-way cam in both sides and are symmetrically installed in centre, directive wheel and bidirectional cam, meanwhile, transmission shaft passes through Torque drive section delivers torque to bidirectional cam and one-way cam, drives bidirectional cam and one-way cam synchronous rotary；Transmission Axis both ends are special threads, for connecting top connection and lower contact；In the middle part of transmission shaft in torque drive section and both ends special thread Between be circular shaft section, for installing end cap, two terminal circle shaft section diameter can be equal or unequal, but at least one end circle shaft section diameter be less than Torque drive section diameter, therefore, two end cap median pore diameters can be equal or unequal, and equal with corresponding circle shaft section diameter. It is drilling fluid runner from the point of view of inside, inside transmission shaft.
Lower contact is mesoporous, thick-walled metal cylinder.Externally, lower contact upper end is cylinder, can be described as being engaged Section, for the occlusion of live binding clip, shackle operation；It is engaged below section or lower contact lower end is screw threads of petroleum drilling tools, for connecting Lower drilling tool.From the point of view of inside, lower contact upper end is special thread, for connecting transmission shaft；Below special thread or lower contact Lower end is drilling fluid runner.
End cap is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, thickness is slightly less than transmission shaft circular shaft segment length, edge protrusion Position is known as rib, and indentation position is known as dredging flow groove between adjacent ribs.Three ribs, 120 ° of circumferential directions uniformly design, at the top of rib and dredging flow groove bottom Portion is arc surface, and rib two sides are two parallel planes, and rib top arc face diameter is slightly less than borehole diameter, and rib is wide and aerial drainage Trench bottom arc surface diameter recommends dredging flow groove areal calculation to determine, and rib top arc face and aerial drainage trench bottom according to petroleum tool Arc surface is coaxial with mesoporous cylindrical surface.End cap side adjacent with top connection or lower contact, and diameter be more than top connection or under connect Head diameter portion is processed into circular conical surface, is conducive to the safety that makes a trip.It is processed into shoulder, rib top platform in end cap side adjacent with outer barrel Shoulder is relatively high, and rib both sides shoulder and dredging flow groove bottom shoulder are relatively low, alternatively, rib top shoulder, rib both sides shoulder and letting out Bottom height of shoulder is equal, and identical with outer barrel corresponding position wall thickness, for installing outer barrel, is specifically processed in design When consider as a whole.End cap rib top shoulder or dredging flow groove bottom shoulder processing pin hole, alternatively, rib top shoulder and dredging flow groove bottom Portion's shoulder processes pin hole, and for installing pin, fixed outer cylinder is specifically considered as a whole when designing and processing.In end cap mesoporous Seal groove can be processed or do not process seal groove, specifically considered as a whole when designing and processing.Installation axle can be designed in end cap mesoporous It holds or does not design installation bearing, specifically considered as a whole when designing and processing.
Outer barrel is three prismatic metal tubes, and in plum blossom-shaped, edge boss is known as rib, and indentation position is known as letting out between adjacent ribs Chute.Three ribs, 120 ° of circumferential directions uniformly design, rib top exterior walls, rib top inner wall, dredging flow groove bottom outer wall and aerial drainage trench bottom Inner wall is arc surface, and four arc surfaces are coaxial, and rib two sides outer wall and inner wall are four parallel planes, wall thickness phase at the top of rib To larger, rib both sides wall thickness and dredging flow groove bottom wall thickness are relatively thin, alternatively, wall thickness, rib both sides wall thickness and dredging flow groove at the top of rib Bottom wall thickness is equal, and identical with end cap corresponding position height of shoulder, for installing end cap, is specifically united when designing and processing Raise consideration.Outer barrel rib top center position is machined with shaft-like wing plate hole, for installing shaft-like wing plate.Outer barrel rib top both ends are let out Bottom both ends symmetrical machining pin hole, alternatively, both ends and the equal symmetrical machining pin hole in aerial drainage trench bottom both ends at the top of rib, are used In installation pin, fixed end cap is specifically considered as a whole when designing and processing.
Bidirectional cam is mesoporous, irregular metal plate, and in plum blossom-shaped, edge boss is known as otic placode, between adjacent otic placode Indentation position is known as groove.Three otic placodes, 120 ° of circumferential directions uniformly design, and at the top of otic placode and bottom portion of groove is arc surface, and in Axis where hole is coaxial, and otic placode top arc face diameter is slightly less than outer barrel rib top inner wall arc surface diameter, bottom portion of groove arc surface Diameter is slightly less than outer barrel dredging flow groove bottom interior wall arc surface diameter, and otic placode two sides are non-parallel planes, and otic placode is wide is slightly larger than Wall wide half in outer barrel rib two sides, in other words, when bidirectional cam is rotated clockwise to stop, otic placode right side and outer barrel rib Right side inner wall overlaps, and when bidirectional cam rotates counterclockwise to stop, otic placode left side is overlapped with outer barrel rib left side inner wall. Cam rail is machined on three otic placodes, railway technology parameter is identical, and waist typed through hole or waist type are formed on otic placode Sliding slot, cam rail both ends are arc surface, and diameter is equal with pin diameter in shaft-like wing plate, cam rail madial wall and outside Wall for two be mutually parallel plane or curved surface and with the tangent connection of both ends arc surface, in other words, waist typed through hole or waist type sliding slot are wide It is equal with pin diameter in shaft-like wing plate, when bidirectional cam is rotated clockwise to stop, where cam rail left end arc surface Axis is placed exactly on outer barrel rib central plane, when bidirectional cam rotates counterclockwise to stop, cam rail right end arc surface institute It is placed exactly on outer barrel rib central plane in axis, meanwhile, axis where cam rail left end arc surface is to wheelbase where mesoporous from small In axis where cam rail right end arc surface to wheelbase where mesoporous from therefore, waist typed through hole or waist type sliding slot madial wall play The effect of shaft-like wing plate is pushed outwardly, waist typed through hole or waist type sliding slot lateral wall, which play, inwardly withdraws the effect of shaft-like wing plate.It is two-way convex Wheel is mounted on by mesoporous on transmission shaft, and middle hole shape is identical with torque transmission shaft transmission segment shape, and technical parameter matches, Bidirectional cam is delivered torque to, drives bidirectional cam synchronous rotary.
Directive wheel is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, edge boss is known as rib, indentation portion between adjacent ribs Position is known as groove.Three ribs, 120 ° of circumferential directions uniformly design, and at the top of rib and bottom portion of groove is arc surface, diameter respectively with outer barrel rib Top inner wall arc surface diameter and dredging flow groove bottom interior wall arc surface diameter are equal, and coaxial with mesoporous cylindrical surface, rib both sides Face be two parallel planes, rib is wide equal with wall wide in outer barrel rib two sides, and directive wheel is imbedded mounted on outer barrel, and with it is outer Cylinder relative securement.Shaft-like wing plate track is machined on three ribs, and consistent with shaft-like wing plate hole site at the top of outer barrel rib, be used for Shaft-like wing plate is installed, shaft-like wing plate is diametrically reciprocated in orbit and is play the guiding role.Directive wheel is mounted on by mesoporous On transmission shaft, mesoporous is cylindrical hole, and diameter is slightly larger than torque transmission shaft transmission segment diameter, it is ensured that transmission shaft does not drive directive wheel to revolve Turn.
One-way cam is mesoporous, irregular metal column, and in plum blossom-shaped, indentation position is known as base on the left of cam rail Axis, cam rail right side boss are known as otic placode.Three cam rails, 120 ° of circumferential directions uniformly design, and railway technology parameter is complete It is identical and identical with bidirectional cam waist typed through hole or waist type sliding slot madial wall railway technology parameter, for being pushed outwardly the shaft-like wing Plate.Position minimum with cam rail and highest position diameter are equal respectively for standard shaft and otic placode top arc face diameter, and standard shaft is justified Cambered surface and otic placode top arc face and axis where mesoporous are coaxial.When one-way cam and bidirectional cam track are completely superposed, unidirectionally Cam otic placode right side is overlapped with bidirectional cam otic placode right side.One-way cam is mounted on by mesoporous on transmission shaft, mesoporous shape Shape is identical with torque transmission shaft transmission segment shape, and technical parameter matches, and delivers torque to one-way cam, and driving is unidirectional convex Take turns synchronous rotary.
Shaft-like wing plate is made of axis pin, wing plate and screw die.Wing plate is top bump, approximate metal cuboid, and length is opposite Larger, width and height are relatively small, when shaft-like wing plate is mounted in mechanical tapered stabilizer, at the top of wing plate outwardly and It can be observed wing plate top shape in outer barrel shaft-like wing plate hole, be convex arc surface along its length, arc surface diameter at the top of wing plate Equal with outer barrel rib top exterior walls arc surface diameter, wing plate bottom is rectangular planes, forward, wing plate is carried on the back for wing plate front side inwardly Side is two rectangular planes that are mutually parallel, upward, wing plate bottom side is two approximations that are mutually parallel downward for wing plate top side backwards Quadrangular plan, top margin are convex arc-shaped edges, and excess-three side is straight flange.Axis pin is metal cylinder, and diameter is less than wing plate width, long Degree is more than wing plate length, and both ends are symmetrically uniformly distributed beyond tab portions and in bidirectional cam waist typed through hole or waist type sliding slot. Screw die is blade-like, approximate metal rectangular pyramid, and length is identical with wing plate, and width and height are relatively smaller, at the top of screw die outwardly, For long narrow square planar, width is according to formation hardness and tungsten carbide button's tooth (or diamond alloy tooth) design processing, screw die Bottom is concaved circular cambered surface inwardly, and diameter is equal with wing plate top arc face diameter, and on front side of screw die forward, screw die back side backwards, is Two ladder planes, and be known as drag angle at the top of screw die and screw die bottom oblique, screw die front side inclination angle, directly decide Stabilizing tool face effect, screw die back side inclination angle are known as back rake, directly decide screw die intensity, screw die top side upward, screw die Bottom side downward, be two approximate trapezoid planes, base be concave arc side, excess-three side be straight flange, and with screw die at the top of and plate Tooth bottom oblique is conducive to the screw die cutting borehole wall and the safety that makes a trip.When axis pin, wing plate and screw die are overall structure, screw die At the top of wing plate, axis pin is in wing plate bottom, and axis pin and wing plate overlapping part or the most cylindrical surfaces of axis pin are exposed outside wing plate, Or the most cylindrical surfaces of axis pin are included in inside wing plate but wing plate bottom is processed to most circles with one-way cam rail contact position Cylinder.When axis pin, wing plate are overall structure, axis pin and wing plate overlapping part or the most cylindrical surfaces of axis pin are exposed outside wing plate Portion or the most cylindrical surfaces of axis pin are included in inside wing plate but wing plate bottom is processed to mostly with one-way cam rail contact position Cylindrical surface, wing plate top design are processed into dovetail groove or T-slot or other shapes slot, and screw die bottom corresponds to design and is processed into swallow Shape of tail or T-shaped shape or other shapes and match with wing plate, the two passes through dovetail groove or T-slot or other shapes slot combines Integrally.When wing plate and screw die are overall structure, wing plate bottom, which can be designed, is processed into axis hole, and wing plate bottom and one-way cam Sunk structure is processed at rail contact position, and cup depth is more than axis pin radius, and axis pin and wing plate are combined into one by axis hole. When axis pin, wing plate and screw die are separate structure, and when wing plate is designed to be processed into upper flange and lower wing plate, upper flange and screw die or For overall structure or be separate structure, if upper flange and screw die are separate structure, the two by dovetail groove or T-slot or its He is combined into one shape slot, lower wing plate and axis pin or is overall structure or is separate structure, if lower wing plate and axis pin are split Structure, the two are combined into one by axis hole, and upper flange and lower wing plate are integral by screw association again.In addition, axis pin, wing plate It can be also combined into one by other means with screw die, combination is different, and axis pin, wing plate and screw die structure and shape may It is adjusted and is changed, specifically considered as a whole when designing and processing.
Pin is that bottom end is big, the small columnar metal body in top.Top and lower shape may be designed to cylinder or more ribs etc. Side column body or Elliptic Cylinder or other shapes cylinder, the two shape can be identical, can also be different, and specifically processed in design When consider as a whole.In general, pin bottom end is mounted in end cap pin hole, the two shape and technical parameter can be matched or be mismatched； Pin top is mounted in outer barrel pin hole, and the two shape and technical parameter can be matched or be mismatched, and is specifically processed in design When consider as a whole.When end cap pin hole and pin bottom end, outer barrel pin hole and pin top, being mutually matched or mismatching causes pin When nail is rotatable in end cap and outer barrel pin hole, cavity is designed to inside pin, for installing spring, furtherly, group First pin and spring are placed on simultaneously in end cap pin hole during dress, when end cap pin hole and the coincidence of outer barrel pin hole, pin It is stretched out using spring, pin top enters outer barrel pin hole, and pin bottom end stays in end cap pin hole, fixed end cap and outer barrel.When End cap pin hole and pin bottom end, outer barrel pin hole and pin top, being mutually matched or mismatching causes pin in end cap and outside When non-rotatable in cylinder pin nail hole, screw hole is designed to inside pin, for mounting screw, furtherly, first by pin during assembling Be placed in end cap pin hole, when end cap pin hole and outer barrel pin hole overlap, pin using screw jack-up, pin top into Enter outer barrel pin hole, pin bottom end stays in end cap pin hole, fixed end cap and outer barrel.In addition to spring and screw, it can be also utilized Pin is stretched out or jacked up by its mode, is specifically considered as a whole when designing and processing.
During assembling, first have to confirm outer barrel, shaft-like wing plate, bidirectional cam and one-way cam installation direction；Secondly, outer Cylinder, shaft-like wing plate, one-way cam and transmission shaft ecto-entad fit together, and rotating drive shaft makes one-way cam and the shaft-like wing Plate is in retrieving position；Again, one-way cam both sides are symmetrically installed directive wheel and bidirectional cam, it is ensured that bidirectional cam and unidirectional convex Wheel track direction is consistent；Then, pin is placed in end cap pin hole, both ends of the drive shaft circular shaft section is installed to by mesoporous, Gu Determine outer barrel and end cap；Finally, top connection and lower contact are connected.It assembles environment or condition is different, assembling sequence or method may It is adjusted and is changed, specifically considered as a whole in assembling.
For connecting portion between top connection, transmission shaft and lower contact, seal groove can be processed or do not process seal groove, had Body is considered as a whole when designing and processing.
For connecting portion between top connection, transmission shaft and lower contact, anti-lost slot can be processed or do not process anti-lost slot, such as Fruit processes anti-lost slot, forms anti-lost function using metal ball or screw or metal ball and screw association, specifically adds in design Working hour is considered as a whole.
For type of attachment between top connection, transmission shaft and lower contact, in addition to special thread, also can be used overall structure or Other connection modes are specifically considered as a whole when designing and processing.When top connection and transmission shaft, alternatively, transmission shaft and lower contact are During overall structure, both ends of the drive shaft circle shaft section diameter is unequal, top connection or lower contact adjacent one end circle shaft section diameter be equal to or Slightly larger than torque transmission shaft transmission segment diameter, non-adjacent one end circle shaft section diameter is less than torque transmission shaft transmission segment diameter, therefore, Two end cap median pore diameters are unequal and equal with corresponding circle shaft section diameter, meanwhile, top connection, transmission shaft, lower contact and end Lid structure and shape may be adjusted and be changed, and specifically be considered as a whole when designing and processing.
For drilling fluid runner inside top connection, transmission shaft and lower contact, anti-lost function can be installed or anti-lost work(is not installed Can, specifically considered as a whole when designing and processing.Anti-lost function is usually made of anti-boom, anti-lost disk and anti-cap off；Anti-boom is Rod-shaped, columnar metal body, in cylinder or other shapes cylinder, both ends are round thread or jump-ring slot or other connections for centre Form；Anti-lost disk is mesoporous, rosette, and median pore diameter is slightly larger than anti-boom both ends diameter, waits radiuses circumferentially equal around mesoporous Cloth is processed into circular hole or other shapes hole, as drilling fluid runner；During assembling, by anti-boom pass through top connection, transmission shaft and under Connector drilling fluid runner, anti-lost disk are worn over anti-boom both ends by mesoporous, and installation is anti-to be capped off, and compresses anti-lost disk.
For type of attachment between end cap and outer barrel, in addition to pin, hexagon socket cap head screw or interior hexagonal also can be used Sunk screw or other type screws fix end cap and outer barrel.Screw form difference, end cap and outer barrel pin pore structure and shape Shape may be adjusted and be changed, and specifically be considered as a whole when design is processed into.
For seal form between end cap and outer barrel, when assembling, can smear fluid sealant or in end cap platform on end cap shoulder Seal groove and Aided design special sealing ring are processed on shoulder or designs processing gasket and sealing plate in end cap inner face, specifically It is considered as a whole when designing and processing.
Between end cap, bidirectional cam, directive wheel and one-way cam, between top connection and end cap, end cap and lower contact it Between drag reduction form, processing reducing drag or design installation bearing can be designed between adjacent component, specifically plans as a whole to examine when designing and processing Consider.
Field working conditions or processing technology are different, and shaft-like wing plate length is different with diameter is stretched out, bidirectional cam, directive wheel and list To cam combination mode difference, therefore, mechanical tapered stabilizer internal structure is also different.Furtherly, if shaft-like wing plate is long It is relatively small to spend relatively short and stretching diameter, then, bidirectional cam, directive wheel can be used in mechanical tapered stabilizer internal structure It is combined with bidirectional cam, bidirectional cam plays the role of being pushed outwardly simultaneously and inwardly withdraws shaft-like wing plate；If shaft-like wing plate is long It is relatively large to spend relatively long and stretching diameter, then, mechanical tapered stabilizer internal structure can be used bidirectional cam, be oriented to Wheel, one-way cam, directive wheel and bidirectional cam combination, one-way cam play the role of being pushed outwardly shaft-like wing plate, and bidirectional cam rises The effect of shaft-like wing plate is withdrawn to inside, alternatively, bidirectional cam plays the role of being pushed outwardly simultaneously and inwardly withdraws shaft-like wing plate；With This analogizes, if shaft-like wing plate length is longer and stretching diameter is bigger, then, mechanical tapered stabilizer internal structure is more complicated, Specifically considered as a whole when designing and processing.Mechanical tapered stabilizer internal structure is different, bidirectional cam, directive wheel and one-way cam Structure and shape may be adjusted and be changed, and specifically be considered as a whole when designing and processing.
The advantageous effect of patent of the present invention is：During directional well, horizontal well drilling, mechanical tapered stabilizer usually connects It is connected to helicoid hydraulic motor top or moves up in a distance drilling tool, mechanical tapered stabilizer is nearer apart from helicoid hydraulic motor, stabilizing tool Face effect is better.Put tool-face or during compound drilling, turntable (or top is driven) torque higher than helicoid hydraulic motor reaction torque, down-hole equipment and Helicoid hydraulic motor composite drive drill bit rotates clockwise, and transmission shaft is rotated clockwise by the driving of top drilling tool, outside bidirectional cam track Side wall pushes shaft-like wing plate inwardly to move, and shaft-like wing plate is withdrawn, and mechanical tapered stabilizer is equivalent to drilling string stabilizer.Slipping drilling When, turntable (or top is driven) does not drive down-hole equipment to rotate, and helicoid hydraulic motor driving drill bit rotates clockwise, and transmission shaft is by lower drilling tool Driving rotation counterclockwise, bidirectional cam track inside wall and one-way cam push shaft-like wing plate to move out jointly, shaft-like wing plate It stretches out and imbeds the borehole wall, helicoid hydraulic motor reaction torque is prevented to be communicated up, eliminate helicoid hydraulic motor untwisting angle, thoroughly solve helicoid hydraulic motor Slipping drilling orientation is difficult.
Description of the drawings
Attached drawing 1 is the structure diagram of patent machinery tapered stabilizer of the present invention.
Reference sign：1- top connections, 2- pins, 3- transmission shafts, 4- shaft-like wing plate, 5- lower contacts, 6- end caps, 7- are bis- To cam, 8- directive wheels, 9- one-way cams, 10- outer barrels.
Specific embodiment
Mechanical tapered stabilizer is mainly by top connection (1), pin (2), transmission shaft (3), shaft-like wing plate (4), lower contact (5), end cap (6), bidirectional cam (7), directive wheel (8), one-way cam (9) and outer barrel (10) composition.
Patent of the present invention is described further with reference to the accompanying drawings and examples.
Top connection (1) is mesoporous, thick-walled metal cylinder.Externally, top connection (1) is cylinder, can be described as stinging Section is closed, for the occlusion of live binding clip, shackle operation.From the point of view of inside, top connection (1) upper end is screw threads of petroleum drilling tools, is used for Connect top drilling tool；It is drilling fluid runner below screw threads of petroleum drilling tools；Below drilling fluid runner or top connection (1) lower end is special Screw thread, for connecting transmission shaft (3).
Transmission shaft (3) is mesoporous, thick-walled metal axis.Externally, it is torque drive section in the middle part of transmission shaft (3), torque Transmission segment may be designed to splined shaft or the equilateral cylinder of more ribs or Elliptic Cylinder or other shapes cylinder, two-way convex for installing Take turns (7), directive wheel (8) and one-way cam (9), one-way cam (9) centre, directive wheel (8) and bidirectional cam (7) in both sides and It is symmetrically installed, meanwhile, transmission shaft (3) delivers torque to bidirectional cam (7) and one-way cam (9) by torque drive section, drives Dynamic bidirectional cam (7) and one-way cam (9) synchronous rotary；Transmission shaft (3) both ends are special threads, for connecting top connection (1) With lower contact (5)；It is circular shaft section among transmission shaft (3) middle part torque drive section and both ends special thread, for installing end cap (6), two terminal circle shaft section diameter can be equal or unequal, but at least circle shaft section diameter in one end is less than torque drive section diameter, therefore, Two end cap (6) median pore diameters can be equal or unequal, and equal with corresponding circle shaft section diameter.From the point of view of inside, transmission shaft (3) internal is drilling fluid runner.
Lower contact (5) is mesoporous, thick-walled metal cylinder.Externally, lower contact (5) upper end is cylinder, can be claimed To be engaged section, for the occlusion of live binding clip, shackle operation；It is engaged below section or lower contact (5) lower end is screw threads of petroleum drilling tools, For connecting lower drilling tool.From the point of view of inside, lower contact (5) upper end is special thread, for connecting transmission shaft (3)；Special spiral shell Below line or lower contact (5) lower end is drilling fluid runner.
End cap (6) is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, thickness is slightly less than transmission shaft (3) circular shaft segment length, side It is known as rib along boss, indentation position is known as dredging flow groove between adjacent ribs.Three ribs, 120 ° of circumferential directions uniformly design, and at the top of rib and let out Bottom is arc surface, and rib two sides are two parallel planes, and rib top arc face diameter is slightly less than borehole diameter, and rib is wide Dredging flow groove areal calculation is recommended to determine, and rib top arc face and aerial drainage according to petroleum tool with aerial drainage trench bottom arc surface diameter Trench bottom arc surface is coaxial with mesoporous cylindrical surface.End cap (6) and top connection (1) or the adjacent side of lower contact (5), and diameter is big Circular conical surface is processed into top connection (1) or lower contact (5) diameter portion, is conducive to the safety that makes a trip.End cap (6) and outer barrel (10) Shoulder is processed into adjacent side, and rib top shoulder is relatively high, rib both sides shoulder and dredging flow groove bottom shoulder it is relatively low or Person, rib top shoulder, rib both sides shoulder and dredging flow groove bottom shoulder are highly equal, and with outer barrel (10) corresponding position wall thickness It is identical, for installing outer barrel (10), specifically considered as a whole when designing and processing.End cap (6) rib top shoulder or aerial drainage trench bottom Shoulder processes pin hole, alternatively, rib top shoulder and dredging flow groove bottom shoulder process pin hole, for installing pin (2), Gu Determine outer barrel (10), specifically considered as a whole when designing and processing.Seal groove can be processed in end cap (6) mesoporous or does not process seal groove, Specifically considered as a whole when designing and processing.Installation bearing can be designed in end cap (6) mesoporous or does not design installation rolling bearing, had Body is considered as a whole when designing and processing.
Outer barrel (10) is three prismatic metal tubes, and in plum blossom-shaped, edge boss is known as rib, and indentation position claims between adjacent ribs For dredging flow groove.Three ribs, 120 ° of circumferential directions uniformly design, rib top exterior walls, rib top inner wall, dredging flow groove bottom outer wall and dredging flow groove Bottom interior wall is arc surface, and four arc surfaces are coaxial, and rib two sides outer wall and inner wall are four parallel planes, rib top wall Thick relatively large, rib both sides wall thickness and dredging flow groove bottom wall thickness are relatively thin, alternatively, wall thickness, rib both sides wall thickness and being let out at the top of rib Bottom wall thickness is equal, and identical with end cap (6) corresponding position height of shoulder, for installing end cap (6), is specifically being set It is considered as a whole during meter processing.Outer barrel (10) rib top center position is machined with shaft-like wing plate hole, for installing shaft-like wing plate (4). Both ends or aerial drainage trench bottom both ends symmetrical machining pin hole at the top of outer barrel (10) rib, alternatively, both ends and aerial drainage trench bottom at the top of rib The equal symmetrical machining pin hole in both ends, for installing pin (2), fixed end cap (6) is specifically considered as a whole when designing and processing.
Bidirectional cam (7) is mesoporous, irregular metal plate, and in plum blossom-shaped, edge boss is known as otic placode, adjacent otic placode Between indentation position be known as groove.Three otic placodes, 120 ° of circumferential directions uniformly design, and at the top of otic placode and bottom portion of groove is arc surface, and with Axis where mesoporous is coaxial, and otic placode top arc face diameter is slightly less than outer barrel (10) rib top inner wall arc surface diameter, bottom portion of groove Arc surface diameter is slightly less than outer barrel (10) dredging flow groove bottom interior wall arc surface diameter, and otic placode two sides are non-parallel planes, and ear Plate is wide to be slightly larger than wall wide half in outer barrel (10) rib two sides, in other words, when bidirectional cam (7) is rotated clockwise to stop, Otic placode right side is overlapped with outer barrel (10) rib right side inner wall, when bidirectional cam (7) rotates counterclockwise to stop, on the left of otic placode Face is overlapped with outer barrel (10) rib left side inner wall.Cam rail is machined on three otic placodes, railway technology parameter is identical, And waist typed through hole or waist type sliding slot are formed on otic placode, cam rail both ends are arc surface, and diameter in shaft-like wing plate (4) with selling Shaft diameter is equal, cam rail madial wall and lateral wall for two be mutually parallel plane or curved surface and with the tangent company of both ends arc surface It connects, in other words, pin diameter is equal in waist typed through hole or wide (4) with shaft-like wing plate of waist type sliding slot, when bidirectional cam (7) is clockwise When rotating to stop, axis where cam rail left end arc surface is placed exactly on outer barrel (10) rib central plane, works as bidirectional cam (7) when rotating counterclockwise to stop, axis where cam rail right end arc surface is placed exactly on outer barrel (10) rib central plane, together When, axis where cam rail left end arc surface is to wheelbase where mesoporous from less than axis where cam rail right end arc surface to mesoporous Place wheelbase is from therefore, waist typed through hole or waist type sliding slot madial wall play and be pushed outwardly shaft-like wing plate (4) effect, waist typed through hole Or waist type sliding slot lateral wall plays and inwardly withdraws shaft-like wing plate (4) effect.Bidirectional cam (7) is mounted on transmission shaft by mesoporous (3) on, middle hole shape is identical with transmission shaft (3) torque drive section shape, and technical parameter matches, and delivers torque to two-way Cam (7) drives bidirectional cam (7) synchronous rotary.
Directive wheel (8) is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, edge boss is known as rib, indentation between adjacent ribs Position is known as groove.Three ribs, 120 ° of circumferential directions uniformly design, and at the top of rib and bottom portion of groove is arc surface, diameter respectively with outer barrel (10) rib top inner wall arc surface diameter and dredging flow groove bottom interior wall arc surface diameter are equal, and coaxial with mesoporous cylindrical surface, Rib two sides are two parallel planes, and rib is wide equal with wall wide in outer barrel (10) rib two sides, and directive wheel (8) is imbedded mounted on outer Cylinder (10) is internal, and with outer barrel (10) relative securement.Be machined with shaft-like wing plate track on three ribs, and with outer barrel (10) rib top Portion shaft-like wing plate hole site is consistent, and for installing shaft-like wing plate (4), shaft-like wing plate (4) is diametrically reciprocated in orbit It play the guiding role.Directive wheel (8) is mounted on by mesoporous on transmission shaft (3), and mesoporous is cylindrical hole, and diameter is slightly larger than transmission shaft (3) torque drive section diameter, it is ensured that transmission shaft (3) does not drive directive wheel (8) to rotate.
One-way cam (9) is mesoporous, irregular metal column, and in plum blossom-shaped, indentation position is known as on the left of cam rail Standard shaft, cam rail right side boss are known as otic placode.Three cam rails, 120 ° of circumferential directions uniformly design, and railway technology parameter is complete It is exactly the same and identical with bidirectional cam (7) waist typed through hole or waist type sliding slot madial wall railway technology parameter, for pushing out shaft Shape wing plate (4).Position minimum with cam rail and highest position diameter are equal respectively for standard shaft and otic placode top arc face diameter, and Standard shaft arc surface and otic placode top arc face and axis where mesoporous are coaxial.When one-way cam (9) and bidirectional cam (7) track are complete During coincidence, one-way cam (9) otic placode right side is overlapped with bidirectional cam (7) otic placode right side.One-way cam (9) is pacified by mesoporous On transmission shaft (3), middle hole shape is identical with transmission shaft (3) torque drive section shape, and technical parameter matches, by torque One-way cam (9) is passed to, drives one-way cam (9) synchronous rotary.
Shaft-like wing plate (4) is made of axis pin, wing plate and screw die.Wing plate is top bump, approximate metal cuboid, length phase To larger, width and height are relatively small, when shaft-like wing plate (4) in mechanical tapered stabilizer, court at the top of wing plate Wing plate top shape can be observed outside and in outer barrel (10) shaft-like wing plate hole, wing plate top is convex arc surface along its length, Arc surface diameter is equal with outer barrel (10) rib top exterior walls arc surface diameter, and wing plate bottom is rectangular planes, before wing plate inwardly Side is facing forward, and wing plate back side is two rectangular planes that are mutually parallel, upward, wing plate bottom side is two downward for wing plate top side backwards Be mutually parallel approximate quadrangular plan, and top margin is convex arc-shaped edges, and excess-three side is straight flange.Axis pin is metal cylinder, and diameter is small In wing plate width, length is more than wing plate length, and both ends are symmetrically uniformly distributed beyond tab portions and lead to mounted on bidirectional cam (7) waist type In hole or waist type sliding slot.Screw die is blade-like, approximate metal rectangular pyramid, and length is identical with wing plate, and width and height are relatively more It is small, it is long narrow square planar at the top of screw die outwardly, width is according to formation hardness and tungsten carbide button's tooth (or diamond alloy Tooth) design processing, screw die bottom is concaved circular cambered surface inwardly, and diameter is equal with wing plate top arc face diameter, court on front side of screw die Before, screw die back side is two ladder planes backwards, and is claimed at the top of screw die and screw die bottom oblique, screw die front side inclination angle For drag angle, stabilizing tool face effect directly decide, screw die back side inclination angle is known as back rake, directly decides that screw die is strong Degree, upward, screw die bottom side is two approximate trapezoid planes downward, and base is concave arc side, and excess-three side is straight for screw die top side Side, and be conducive to the screw die cutting borehole wall and the safety that makes a trip with screw die top and screw die bottom oblique.When axis pin, wing plate and When screw die is overall structure, screw die is at the top of wing plate, and axis pin is in wing plate bottom, and axis pin and wing plate overlapping part or axis pin are most Cylindrical surface is exposed outside wing plate or the most cylindrical surfaces of axis pin are included in inside wing plate but wing plate bottom and one-way cam (9) rail Road contact site is processed to most cylindrical surfaces.When axis pin, wing plate are overall structure, axis pin and wing plate overlapping part or axis pin Most cylindrical surfaces are exposed outside wing plate or the most cylindrical surfaces of axis pin are included in inside wing plate but wing plate bottom and one-way cam (9) rail contact position is processed to most cylindrical surfaces, and wing plate top design is processed into dovetail groove or T-slot or other shapes Slot, screw die bottom correspond to design and are processed into dovetail shaped or T-shaped shape or other shapes and match with wing plate, and the two passes through dovetail Slot or T-slot or other shapes slot are combined into one.When wing plate and screw die are overall structure, wing plate bottom can design processing Into axis hole, and sunk structure is processed into wing plate bottom with one-way cam (9) rail contact position, and cup depth is more than axis pin half Diameter, axis pin and wing plate are combined into one by axis hole.When axis pin, wing plate and screw die are separate structure, and wing plate is designed to process During into upper flange and lower wing plate, upper flange and screw die or be overall structure or be separate structure, if upper flange and screw die are split Structure, the two are combined into one by dovetail groove or T-slot or other shapes slot, lower wing plate and axis pin or be overall structure, Or be separate structure, if lower wing plate and axis pin are separate structure, the two is combined into one by axis hole, and upper flange and lower wing plate are again It is integral by screw association.In addition, axis pin, wing plate and screw die can be also combined into one by other means, combination is not Together, axis pin, wing plate and screw die structure and shape may be adjusted and be changed, and specifically be considered as a whole when designing and processing.
Pin (2) is that bottom end is big, the small columnar metal body in top.Top and lower shape may be designed to cylinder or more The equilateral cylinder of rib or Elliptic Cylinder or other shapes cylinder, the two shape can be identical, can also be different, specifically designing It is considered as a whole during processing.In general, pin (2) bottom end is mounted in end cap (6) pin hole, the two shape and technical parameter can match Or it mismatches；Pin (2) top is mounted in outer barrel (10) pin hole, and the two shape and technical parameter can be matched or be mismatched, Specifically considered as a whole when designing and processing.When end cap (6) pin hole and pin (2) bottom end, outer barrel (10) pin hole and pin (2) top is mutually matched or mismatches when causing pin (2) rotatable in end cap (6) and outer barrel (10) pin hole, pin (2) internal to be designed to cavity, for installing spring, furtherly, pin (2) and spring are first placed on end cap by when assembling simultaneously (6) in pin hole, when end cap (6) pin hole and the coincidence of outer barrel (10) pin hole, pin (2) is stretched out using spring, pin (2) Top enters outer barrel (10) pin hole, and pin (2) bottom end stays in end cap (6) pin hole, fixed end cap (6) and outer barrel (10).When End cap (6) pin hole and pin (2) bottom end, outer barrel (10) pin hole and pin (2) top, being mutually matched or mismatching causes pin When nail (2) is non-rotatable in end cap (6) and outer barrel (10) pin hole, screw hole is designed to inside pin (2), for installing spiral shell Pin (2) is first placed in end cap (6) pin hole by nail, furtherly, when assembling, when end cap (6) pin hole and outer barrel (10) When pin hole overlaps, pin (2) is jacked up using screw, and pin (2) top enters outer barrel (10) pin hole, and pin (2) bottom end is stayed In end cap (6) pin hole, fixed end cap (6) and outer barrel (10).In addition to spring and screw, also using other manner by pin (2) it stretches out or jacks up, specifically considered as a whole when designing and processing.
During assembling, first have to confirm outer barrel (10), shaft-like wing plate (4), bidirectional cam (7) and one-way cam (9) installation Direction；Secondly, outer barrel (10), shaft-like wing plate (4), one-way cam (9) and transmission shaft (3) ecto-entad are fitted together, revolved Turn transmission shaft (3), one-way cam (9) and shaft-like wing plate (4) is made to be in retrieving position；Again, one-way cam (9) both sides are symmetrically pacified Fill directive wheel (8) and bidirectional cam (7), it is ensured that bidirectional cam (7) is consistent with one-way cam (9) orbital direction；Then, end cap (6) pin (2) is placed in pin hole, transmission shaft (3) two terminal circle shaft part, fixed outer cylinder (10) and end cap are installed to by mesoporous (6)；Finally, connection top connection (1) and lower contact (5).It assembles environment or condition is different, assembling sequence or method may be Adjustment and change are specifically considered as a whole in assembling.
For connecting portion between top connection (1), transmission shaft (3) and lower contact (5), seal groove can be processed or do not processed Seal groove is specifically considered as a whole when designing and processing.
For connecting portion between top connection (1), transmission shaft (3) and lower contact (5), anti-lost slot can be processed or do not processed Anti-lost slot if processing anti-lost slot, forms anti-lost function, specifically using metal ball or screw or metal ball and screw association It is considered as a whole when designing and processing.
For type of attachment between top connection (1), transmission shaft (3) and lower contact (5), in addition to special thread, also can be used Overall structure or other connection modes are specifically considered as a whole when designing and processing.When top connection (1) and transmission shaft (3), alternatively, When transmission shaft (3) and lower contact (5) are overall structure, transmission shaft (3) two terminal circle shaft section diameter is unequal, top connection (1) or under The adjacent one end circle shaft section diameter of connector (5) is equal or slightly larger than transmission shaft (3) torque drive section diameter, non-adjacent one end circular shaft section Diameter be less than transmission shaft (3) torque drive section diameter, therefore, two end cap (6) median pore diameters it is unequal and with corresponding circular shaft Section diameter is equal, meanwhile, top connection (1), transmission shaft (3), lower contact (5) and end cap (6) structure and shape may be adjusted Whole and change is specifically considered as a whole when designing and processing.
For top connection (1), the internal drilling fluid runner of transmission shaft (3) and lower contact (5), anti-lost function or not can be installed Anti-lost function is installed, is specifically considered as a whole when designing and processing.Anti-lost function usually by anti-boom, anti-lost disk and prevents capping off group Into；Anti-boom is rod-shaped, columnar metal body, and in cylinder or other shapes cylinder, both ends are round thread or jump-ring slot for centre, Or other types of attachment；Anti-lost disk is mesoporous, rosette, and median pore diameter is slightly larger than anti-boom both ends diameter, around mesoporous etc. Radius is circumferentially uniformly processed into circular hole or other shapes hole, as drilling fluid runner；During assembling, anti-boom is passed through into top connection (1), transmission shaft (3) and lower contact (5) drilling fluid runner, anti-lost disk are worn over anti-boom both ends by mesoporous, and installation is anti-to be capped off, and is pressed Tight anti-lost disk.
For type of attachment between end cap (6) and outer barrel (10), in addition to pin (2), interior hexagonal cylindrical head spiral shell also can be used Nail or hexagon socket countersunk flat cap head screw or other type screws fix end cap (6) and outer barrel (10).Screw form is different, end cap (6) it may be adjusted and be changed with outer barrel (10) pin pore structure and shape, specifically be considered as a whole when design is processed into.
For seal form between end cap (6) and outer barrel (10), when assembling, can smear fluid sealant on end cap (6) shoulder, Or seal groove and Aided design special sealing ring are processed on end cap (6) shoulder or designs processing sealing in end cap (6) inner face Pad and sealing plate are specifically considered as a whole when designing and processing.
Between end cap (6), bidirectional cam (7), directive wheel (8) and one-way cam (9), top connection (1) and end cap (6) it Between, drag reduction form between end cap (6) and lower contact (5), processing reducing drag or design installation bearing can be designed between adjacent component, Specifically considered as a whole when designing and processing.
Field working conditions or processing technology are different, and shaft-like wing plate (4) length is different with diameter is stretched out, and bidirectional cam (7) is oriented to Wheel (8) is different with one-way cam (9) combination, and therefore, mechanical tapered stabilizer internal structure is also different.Furtherly, such as Fruit shaft-like wing plate (4) length is relatively short and stretching diameter is relatively small, then, mechanical tapered stabilizer internal structure can be used Bidirectional cam (7), directive wheel (8) and bidirectional cam (7) combination, bidirectional cam (7) while play are pushed outwardly and inwardly withdraw Shaft-like wing plate (4) acts on；Shaft-like wing plate if (4) length is relatively long and stretching diameter is relatively large, then, mechanical reducing is steady Determine device internal structure and bidirectional cam (7), directive wheel (8), one-way cam (9), directive wheel (8) and bidirectional cam (7) group can be used It closes, one-way cam (9) plays the role of being pushed outwardly shaft-like wing plate (4), and bidirectional cam (7), which plays, inwardly withdraws shaft-like wing plate (4) Effect, alternatively, bidirectional cam (7) at the same play the role of being pushed outwardly and inwardly withdraw shaft-like wing plate (4)；And so on, if Shaft-like wing plate (4) length is longer and stretching diameter is bigger, then, mechanical tapered stabilizer internal structure is more complicated, is specifically setting It is considered as a whole during meter processing.Mechanical tapered stabilizer internal structure is different, bidirectional cam (7), directive wheel (8) and one-way cam (9) structure and shape may be adjusted and be changed, and specifically be considered as a whole when designing and processing.
Embodiment
During directional well, horizontal well drilling, mechanical tapered stabilizer is typically connected to helicoid hydraulic motor top or moves up In a distance drilling tool, mechanical tapered stabilizer is nearer apart from helicoid hydraulic motor, and stabilizing tool face effect is better.
When putting tool-face or compound drilling, turntable (or top is driven) torque is higher than helicoid hydraulic motor reaction torque, down-hole equipment and spiral shell Bar drill tool composite drive drill bit rotates clockwise, and transmission shaft (3) is rotated clockwise by the driving of top drilling tool, bidirectional cam (7) rail Wall pushes shaft-like wing plate (4) inwardly to move on the outside of road, and shaft-like wing plate (4) is withdrawn, and mechanical tapered stabilizer is equivalent to drill stem stabilization Device.
During slipping drilling, turntable (or top is driven) does not drive down-hole equipment to rotate, and helicoid hydraulic motor driving drill bit rotates clockwise, Transmission shaft (3) drives rotation counterclockwise by lower drilling tool, and bidirectional cam (7) track inside wall and one-way cam (9) push jointly Shaft-like wing plate (4) moves out, and shaft-like wing plate (4) stretches out and imbeds the borehole wall, and helicoid hydraulic motor reaction torque is prevented to be communicated up, and eliminates It is difficult thoroughly to solve helicoid hydraulic motor slipping drilling orientation for helicoid hydraulic motor untwisting angle.
Only it is above preferred examples to the explanation of patent of the present invention, can not be understood to art solutions of the present invention The limitation of content.In a particular application, technical staff is likely to require to be made to adjust and change individually more than content as the case may be Become, the adjustment and change should all be fallen among the protection domain of patent appended claims of the present invention.

Claims (6)

1. mechanical tapered stabilizer mainly by top connection (1), pin (2), transmission shaft (3), shaft-like wing plate (4), lower contact (5), End cap (6), bidirectional cam (7), directive wheel (8), one-way cam (9) and outer barrel (10) composition；
Top connection (1) is mesoporous, thick-walled metal cylinder；Externally, top connection (1) is cylinder；From the point of view of inside, on Connector (1) upper end is screw threads of petroleum drilling tools, is drilling fluid runner for connecting top drilling tool, below screw threads of petroleum drilling tools, drilling well Below liquid stream road or top connection (1) lower end is special thread, for connecting transmission shaft (3)；
Transmission shaft (3) is mesoporous, thick-walled metal axis；Externally, it is torque drive section in the middle part of transmission shaft (3), torque drive Section may be designed to splined shaft or the equilateral cylinder of more ribs or Elliptic Cylinder or other shapes cylinder, for installing bidirectional cam (7), directive wheel (8) and one-way cam (9), one-way cam (9) is in centre, directive wheel (8) and bidirectional cam (7) in both sides and right Claim installation, transmission shaft (3) both ends are special threads, for connecting top connection (1) and lower contact (5), transmission shaft (3) middle part torque It is circular shaft section among transmission segment and both ends special thread, for installing end cap (6), two terminal circle shaft section diameter can equal or not phase Deng but at least one end circle shaft section diameter is less than torque drive section diameter, and therefore, two end cap (6) median pore diameters can be equal or not It is equal and equal with corresponding circle shaft section diameter；From the point of view of inside, it is drilling fluid runner that transmission shaft (3) is internal；
Lower contact (5) is mesoporous, thick-walled metal cylinder；Externally, lower contact (5) upper end is occlusion section, is engaged under section Face or lower contact (5) lower end are screw threads of petroleum drilling tools, for connecting lower drilling tool；From the point of view of inside, lower contact (5) upper end is special Different screw thread, for connecting transmission shaft (3), below special thread or lower contact (5) lower end is drilling fluid runner；
End cap (6) is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, thickness is slightly less than transmission shaft (3) circular shaft segment length, and edge is convex It plays position and is known as rib, indentation position is known as dredging flow groove between adjacent ribs；Three ribs, 120 ° of circumferential directions uniformly design, rib top and dredging flow groove Bottom is arc surface, and rib two sides are two parallel planes, and rib top arc face and aerial drainage trench bottom arc surface are in Hole cylindrical surface is coaxial；End cap (6) and top connection (1) or the adjacent side of lower contact (5), and diameter be more than top connection (1) or under connect Head (5) diameter portion is processed into circular conical surface；End cap (6) is processed into shoulder with the adjacent side of outer barrel (10), and rib top shoulder is opposite Higher, rib both sides shoulder and dredging flow groove bottom shoulder are relatively low, alternatively, rib top shoulder, rib both sides shoulder and dredging flow groove bottom Portion's height of shoulder is equal, and identical with outer barrel (10) corresponding position wall thickness, for installing outer barrel (10), is specifically added in design Working hour is considered as a whole；End cap (6) rib top shoulder or dredging flow groove bottom shoulder processing pin hole, alternatively, rib top shoulder and letting out Bottom shoulder processes pin hole, and for installing pin (2), fixed outer cylinder (10) specifically is planned as a whole to examine when designing and processing Consider；Seal groove can be processed in end cap (6) mesoporous or does not process seal groove, specifically considered as a whole when designing and processing；End cap (6) Installation bearing can be designed in mesoporous or does not design installation bearing, specifically considered as a whole when designing and processing；
Outer barrel (10) is three prismatic metal tubes, and in plum blossom-shaped, edge boss is known as rib, and indentation position is known as letting out between adjacent ribs Chute；Three ribs, 120 ° of circumferential directions uniformly design, rib top exterior walls, rib top inner wall, dredging flow groove bottom outer wall and aerial drainage trench bottom Inner wall is arc surface, and four arc surfaces are coaxial, and rib two sides outer wall and inner wall are four parallel planes, wall thickness phase at the top of rib To larger, rib both sides wall thickness and dredging flow groove bottom wall thickness are relatively thin, alternatively, wall thickness, rib both sides wall thickness and dredging flow groove at the top of rib Bottom wall thickness is equal, and identical with end cap (6) corresponding position height of shoulder, for installing end cap (6), is specifically added in design Working hour is considered as a whole；Outer barrel (10) rib top center position is machined with shaft-like wing plate hole, for installing shaft-like wing plate (4)；Outer barrel (10) both ends or aerial drainage trench bottom both ends symmetrical machining pin hole at the top of rib, alternatively, both ends and aerial drainage trench bottom both ends at the top of rib Equal symmetrical machining pin hole, for installing pin (2), fixed end cap (6) is specifically considered as a whole when designing and processing；
Bidirectional cam (7) is mesoporous, irregular metal plate, and in plum blossom-shaped, edge boss is known as otic placode, low between adjacent otic placode Recess portion position is known as groove；Three otic placodes, 120 ° of circumferential directions uniformly design, and at the top of otic placode and bottom portion of groove is arc surface, and and mesoporous Place axis is coaxial, and otic placode two sides are non-parallel planes, and otic placode is wide slightly larger than wall wide half in outer barrel (10) rib two sides；Three Cam rail is machined on a otic placode, railway technology parameter is identical, and waist typed through hole or waist type cunning are formed on otic placode Slot, cam rail both ends are arc surface, and diameter is equal with pin diameter in shaft-like wing plate (4), cam rail madial wall and outer Side wall for two be mutually parallel plane or curved surface and with the tangent connection of both ends arc surface, in other words, waist typed through hole or waist type sliding slot It is wide equal with pin diameter in shaft-like wing plate (4), when bidirectional cam (7) is rotated clockwise to stop, cam rail left end circle Axis where cambered surface is placed exactly on outer barrel (10) rib central plane, when bidirectional cam (7) rotates counterclockwise to stop, cam track Axis where road right end arc surface is placed exactly on outer barrel (10) rib central plane, meanwhile, axis where cam rail left end arc surface To wheelbase where mesoporous from less than axis where cam rail right end arc surface to mesoporous place wheelbase from；Bidirectional cam (7) passes through Mesoporous is mounted on transmission shaft (3), and middle hole shape is identical with transmission shaft (3) torque drive section shape, and technical parameter matches；
Directive wheel (8) is mesoporous, three prismatic metallic plates, and in plum blossom-shaped, edge boss is known as rib, indentation position between adjacent ribs Referred to as groove；Three ribs, 120 ° of circumferential directions uniformly design, and at the top of rib and bottom portion of groove is arc surface, and same with mesoporous cylindrical surface Axis, rib two sides are two parallel planes, and rib is wide equal with wall wide in outer barrel (10) rib two sides, and directive wheel (8) imbeds installation It is internal in outer barrel (10), and with outer barrel (10) relative securement；Be machined with shaft-like wing plate track on three ribs, and with outer barrel (10) Shaft-like wing plate hole site is consistent at the top of rib, for installing shaft-like wing plate (4)；Directive wheel (8) is mounted on transmission shaft (3) by mesoporous On, mesoporous is cylindrical hole, and diameter is slightly larger than transmission shaft (3) torque drive section diameter；
One-way cam (9) is mesoporous, irregular metal column, and in plum blossom-shaped, indentation position is known as standard shaft on the left of cam rail, Boss is known as otic placode on the right side of cam rail；Three cam rails, 120 ° of circumferential directions uniformly design, the complete phase of railway technology parameter Together, it is and identical with bidirectional cam (7) waist typed through hole or waist type sliding slot madial wall railway technology parameter；Standard shaft and otic placode top arc Position minimum with cam rail and highest position diameter are equal respectively for face diameter, and standard shaft arc surface and otic placode top arc face with Axis where mesoporous is coaxial；When one-way cam (9) and bidirectional cam (7) track are completely superposed, one-way cam (9) otic placode right side It is overlapped with bidirectional cam (7) otic placode right side；One-way cam (9) is mounted on by mesoporous on transmission shaft (3), and middle hole shape is with passing Moving axis (3) torque drive section shape is identical, and technical parameter matches；
Shaft-like wing plate (4) is made of axis pin, wing plate and screw die；Wing plate is top bump, approximate metal cuboid, and length is relatively Greatly, width and height are relatively small, and at the top of wing plate outwardly, for convex arc surface along its length, wing plate bottom is rectangle inwardly Plane, on front side of wing plate forward, wing plate back side are two rectangular planes that are mutually parallel backwards, wing plate top side upward, wing plate bottom side Downward, it is two approximate quadrangular plans that are mutually parallel, top margin is convex arc-shaped edges, and excess-three side is straight flange；Axis pin is round metal Cylinder, diameter are less than wing plate width, and length is more than wing plate length, and both ends are symmetrically uniformly distributed beyond tab portions and mounted on two-way convex It takes turns in (7) waist typed through hole or waist type sliding slot；Screw die is blade-like, approximate metal rectangular pyramid, and length is identical with wing plate, width with It is highly relatively smaller, it is long narrow square planar at the top of screw die outwardly, screw die bottom is concaved circular cambered surface inwardly, court on front side of screw die Before, screw die back side backwards, be two ladder planes, and with screw die at the top of and screw die bottom oblique, screw die top side upward, screw die Bottom side downward, be two approximate trapezoid planes, base be concave arc side, excess-three side be straight flange, and with screw die at the top of and plate Tooth bottom oblique；When axis pin, wing plate and screw die are overall structure, screw die is at the top of wing plate, and axis pin is in wing plate bottom, and axis pin With wing plate overlapping part or the most cylindrical surfaces of axis pin it is exposed outside wing plate or the most cylindrical surfaces of axis pin be included in wing plate inside but Wing plate bottom is processed to most cylindrical surfaces with one-way cam (9) rail contact position；When axis pin, wing plate are overall structure, Axis pin and wing plate overlapping part or the most cylindrical surfaces of axis pin are exposed outside wing plate or the most cylindrical surfaces of axis pin are included in wing plate Portion but wing plate bottom are processed to most cylindrical surfaces with one-way cam (9) rail contact position, and wing plate top design is processed into swallow Stern notch or T-slot or other shapes slot, screw die bottom correspond to design be processed into dovetail shaped or T-shaped shape or other shapes and with Wing plate matches, and the two is combined into one by dovetail groove or T-slot or other shapes slot；When wing plate and screw die are tied to be whole During structure, wing plate bottom, which can be designed, is processed into axis hole, and recess knot is processed into wing plate bottom with one-way cam (9) rail contact position Structure, cup depth are more than axis pin radius, and axis pin and wing plate are combined into one by axis hole；When axis pin, wing plate and screw die are split Structure, and when wing plate is designed to be processed into upper flange and lower wing plate, upper flange and screw die or is overall structure or is split knot Structure, if upper flange and screw die are separate structure, the two is combined into one by dovetail groove or T-slot or other shapes slot, under Wing plate and axis pin are overall structure or are separate structure, if lower wing plate and axis pin are separate structure, the two is combined by axis hole Integrally, upper flange and lower wing plate are integral by screw association again；In addition, axis pin, wing plate and screw die can also pass through its other party Formula is combined into one, and combination is different, and axis pin, wing plate and screw die structure and shape may be adjusted and changed, specifically It is considered as a whole when designing and processing；
Pin (2) is that bottom end is big, the small columnar metal body in top；Top and lower shape may be designed to cylinder or more ribs etc. Side column body or Elliptic Cylinder or other shapes cylinder, the two shape can be identical, can also be different, and specifically processed in design When consider as a whole；When end cap (6) pin hole and pin (2) bottom end, outer barrel (10) pin hole and pin (2) top are mutually matched Or mismatch when causing pin (2) rotatable in end cap (6) and outer barrel (10) pin hole, pin (2) inside is designed to sky Chamber, for installing spring, furtherly, pin (2) and spring are first placed in end cap (6) pin hole by when assembling simultaneously, when When end cap (6) pin hole and outer barrel (10) pin hole overlap, pin (2) is stretched out using spring, and pin (2) top enters outer barrel (10) pin hole, pin (2) bottom end stay in end cap (6) pin hole, fixed end cap (6) and outer barrel (10)；When end cap (6) pin hole With pin (2) bottom end, outer barrel (10) pin hole and pin (2) top, being mutually matched or mismatching causes pin (2) in end cap (6) when non-rotatable and in outer barrel (10) pin hole, screw hole is designed to inside pin (2), for mounting screw, furtherly, First pin (2) is placed in end cap (6) pin hole during assembling, when end cap (6) pin hole and the coincidence of outer barrel (10) pin hole, Pin (2) is jacked up using screw, and pin (2) top enters outer barrel (10) pin hole, and pin (2) bottom end stays in end cap (6) pin Hole, fixed end cap (6) and outer barrel (10)；In addition to spring and screw, also pin (2) is stretched out or jacked up using other manner, Specifically considered as a whole when designing and processing；
During assembling, first have to confirm outer barrel (10), shaft-like wing plate (4), bidirectional cam (7) and one-way cam (9) installation direction, Secondly, outer barrel (10), shaft-like wing plate (4), one-way cam (9) and transmission shaft (3) ecto-entad are fitted together, rotary drive Axis (3) makes one-way cam (9) and shaft-like wing plate (4) be in retrieving position, and again, one-way cam (9) both sides are symmetrically installed guiding Take turns (8) and bidirectional cam (7), it is ensured that bidirectional cam (7) is consistent with one-way cam (9) orbital direction, then, end cap (6) pin Pin (2) is placed in hole, transmission shaft (3) two terminal circle shaft part, fixed outer cylinder (10) and end cap (6) are installed to by mesoporous, most Afterwards, connection top connection (1) and lower contact (5)；It is different to assemble environment or condition, assembling sequence or method may be adjusted and Change, specifically considered as a whole in assembling.
2. a kind of mechanical tapered stabilizer according to claim 1, it is characterised in that：For top connection (1), transmission shaft (3) connecting portion between lower contact (5), can process seal groove or not process seal groove, specifically plan as a whole to examine when designing and processing Consider；
For connecting portion between top connection (1), transmission shaft (3) and lower contact (5), anti-lost slot can be processed or do not processed anti-lost Slot if processing anti-lost slot, forms anti-lost function using metal ball or screw or metal ball and screw association, is specifically setting It is considered as a whole during meter processing；
For type of attachment between top connection (1), transmission shaft (3) and lower contact (5), in addition to special thread, entirety also can be used Structure or other connection modes are specifically considered as a whole when designing and processing；When top connection (1) and transmission shaft (3), alternatively, transmission When axis (3) and lower contact (5) are overall structure, transmission shaft (3) two terminal circle shaft section diameter is unequal, top connection (1) or lower contact (5) adjacent one end circle shaft section diameter is equal or slightly larger than transmission shaft (3) torque drive section diameter, and shaft section diameter is justified in non-adjacent one end Less than transmission shaft (3) torque drive section diameter, therefore, two end cap (6) median pore diameters it is unequal and with corresponding circular shaft Duan Zhi Diameter is equal, meanwhile, top connection (1), transmission shaft (3), lower contact (5) and end cap (6) structure and shape may be adjusted and Change, specifically considered as a whole when designing and processing；
For the internal drilling fluid runner of top connection (1), transmission shaft (3) and lower contact (5), anti-lost function can be installed or do not installed Anti-lost function is specifically considered as a whole when designing and processing；Anti-lost function is usually made of anti-boom, anti-lost disk and anti-cap off, and is prevented Fall bar for rod-shaped, columnar metal body, centre in cylinder or other shapes cylinder, both ends be round thread or jump-ring slot or its His type of attachment, anti-lost disk is mesoporous, rosette, and median pore diameter is slightly larger than anti-boom both ends diameter, and radiuses are waited around mesoporous It is circumferential to be uniformly processed into circular hole or other shapes hole, as drilling fluid runner, during assembling, by anti-boom pass through top connection (1), Transmission shaft (3) and lower contact (5) drilling fluid runner, anti-lost disk are worn over anti-boom both ends by mesoporous, and installation is anti-to be capped off, and is compressed anti- Fall disk.
3. a kind of mechanical tapered stabilizer according to claim 1, it is characterised in that：For end cap (6) and outer barrel (10) Between type of attachment, in addition to pin (2), hexagon socket cap head screw or hexagon socket countersunk flat cap head screw or other types also can be used Screw fixes end cap (6) and outer barrel (10)；Screw form is different, and end cap (6) and outer barrel (10) pin pore structure and shape can It can be adjusted and be changed, specifically be considered as a whole when design is processed into；
For seal form between end cap (6) and outer barrel (10), when assembling can be smeared on end cap (6) shoulder fluid sealant or Processed on end cap (6) shoulder seal groove and Aided design special sealing ring or end cap (6) inner face design processing gasket and Sealing plate is specifically considered as a whole when designing and processing.
4. a kind of mechanical tapered stabilizer according to claim 1, it is characterised in that：To end cap (6), bidirectional cam (7), Between directive wheel (8) and one-way cam (9), between top connection (1) and end cap (6), drag reduction between end cap (6) and lower contact (5) Form can design processing reducing drag or design installation bearing between adjacent component, specifically be considered as a whole when designing and processing.
5. a kind of mechanical tapered stabilizer according to claim 1, it is characterised in that：Field working conditions or processing technology are not Together, shaft-like wing plate (4) length is different with diameter is stretched out, and bidirectional cam (7), directive wheel (8) and one-way cam (9) combination are not Together, therefore, mechanical tapered stabilizer internal structure is also different；
Furtherly, if shaft-like wing plate (4) length is relatively short and stretching diameter is relatively small, then, mechanical reducing is stablized Bidirectional cam (7), directive wheel (8) and bidirectional cam (7) combination can be used in device internal structure, if shaft-like wing plate (4) length phase It is relatively large to longer and stretching diameter, then, bidirectional cam (7), directive wheel can be used in mechanical tapered stabilizer internal structure (8), one-way cam (9), directive wheel (8) and bidirectional cam (7) combination, and so on, if shaft-like wing plate (4) length it is longer and It is bigger to stretch out diameter, then, mechanical tapered stabilizer internal structure is more complicated, is specifically considered as a whole when designing and processing；
Mechanical tapered stabilizer internal structure is different, and bidirectional cam (7), directive wheel (8) and one-way cam (9) structure and shape can It can be adjusted and be changed, specifically be considered as a whole when designing and processing.
6. a kind of mechanical tapered stabilizer according to claim 1, it is characterised in that：In directional well, horizontal well drilling mistake Cheng Zhong, mechanical tapered stabilizer are typically connected to helicoid hydraulic motor top or move up in a distance drilling tool；
When putting tool-face or compound drilling, transmission shaft (3) is rotated clockwise by the driving of top drilling tool, and shaft-like wing plate (4) is withdrawn, machine Tool tapered stabilizer is equivalent to drilling string stabilizer；
During slipping drilling, transmission shaft (3) drives rotation counterclockwise by lower drilling tool, and shaft-like wing plate (4) stretches out and imbeds the borehole wall, hinders Only helicoid hydraulic motor reaction torque is communicated up, and eliminates helicoid hydraulic motor untwisting angle, and it is difficult thoroughly to solve helicoid hydraulic motor slipping drilling orientation.
CN201810004180.9A 2018-01-05 2018-01-05 A kind of machinery tapered stabilizer Pending CN108179980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810004180.9A CN108179980A (en) 2018-01-05 2018-01-05 A kind of machinery tapered stabilizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810004180.9A CN108179980A (en) 2018-01-05 2018-01-05 A kind of machinery tapered stabilizer

Publications (1)

Publication Number Publication Date
CN108179980A true CN108179980A (en) 2018-06-19

Family

ID=62549926

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810004180.9A Pending CN108179980A (en) 2018-01-05 2018-01-05 A kind of machinery tapered stabilizer

Country Status (1)

Country Link
CN (1) CN108179980A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915613A (en) * 2018-07-19 2018-11-30 江小三 A kind of hydraulic variable diameter stabilizer
CN108952596A (en) * 2018-06-27 2018-12-07 江小三 It is a kind of from the wear-resisting wing plate of sharp type

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2134479Y (en) * 1992-07-08 1993-05-26 大庆石油管理局钻井研究所 Joining spiral stabled apparatus for drilling tool
CN2167182Y (en) * 1993-06-25 1994-06-01 刘文占 Anchoring means for drilling
CN2519010Y (en) * 2001-12-24 2002-10-30 大庆石油管理局 Hydraulic controlled variable gauge stabilizer
CN202832204U (en) * 2012-10-30 2013-03-27 大庆市永晨石油科技有限公司 Variable diameter stabilizer
CN203547579U (en) * 2013-10-31 2014-04-16 成都百施特金刚石钻头有限公司 V-shaped stabilizer for eccentric drilling device
CN106437514A (en) * 2016-10-18 2017-02-22 裴绪建 Tool surface stabilizer

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2134479Y (en) * 1992-07-08 1993-05-26 大庆石油管理局钻井研究所 Joining spiral stabled apparatus for drilling tool
CN2167182Y (en) * 1993-06-25 1994-06-01 刘文占 Anchoring means for drilling
CN2519010Y (en) * 2001-12-24 2002-10-30 大庆石油管理局 Hydraulic controlled variable gauge stabilizer
CN202832204U (en) * 2012-10-30 2013-03-27 大庆市永晨石油科技有限公司 Variable diameter stabilizer
CN203547579U (en) * 2013-10-31 2014-04-16 成都百施特金刚石钻头有限公司 V-shaped stabilizer for eccentric drilling device
CN106437514A (en) * 2016-10-18 2017-02-22 裴绪建 Tool surface stabilizer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108952596A (en) * 2018-06-27 2018-12-07 江小三 It is a kind of from the wear-resisting wing plate of sharp type
CN108915613A (en) * 2018-07-19 2018-11-30 江小三 A kind of hydraulic variable diameter stabilizer

Similar Documents

Publication Publication Date Title
US11156035B2 (en) Method and apparatus for reaming well bore surfaces nearer the center of drift
CN106437514B (en) A kind of tool-face stabilizer
CN101463709B (en) Torsional impact drilling tool
CN101059061B (en) Sliding push-the-bit type steering drilling tool
CN206158612U (en) Rotatory pressurization instrument of drilling string
CN201288505Y (en) Deviation rectifying guidance drilling tool while drilling
CN102900364B (en) Static pointing type rotary guiding drilling tool
CN108179980A (en) A kind of machinery tapered stabilizer
CN109057707A (en) A kind of bionical suslik intelligence driving system
CN104343389B (en) Guiding type rotary steering drilling tool
CN102953682A (en) Tilting tray plunger type rotary guide well drilling tool
CN106285514A (en) A kind of drill string rotating pressurizing tool
CN102678059B (en) Mechanical type drilling tool accumulation of energy protection instrument
CN202220554U (en) Inclined disk plunger type rotary guide well-drilling tool
CN209369725U (en) A kind of static, pushing type hydraulic rotating guide drilling tool
US20180119491A1 (en) Impact-driven downhole motors
CN105239935B (en) A kind of drilling in coal is with spiral counterflush drilling instrument
CN108915613A (en) A kind of hydraulic variable diameter stabilizer
CN106761402A (en) Continuous pipe drilling well directional orientation tool
CN206246058U (en) A kind of tool-face stabilizer
CN205422634U (en) Float shoe is used in well cementation
CN208040307U (en) Simple rotary steering tool
CN205577847U (en) Hob head dowel combination location structure for raise boring machine
CN106639882A (en) While-drilling micro hole opener in sliding drilling mode
CN202483432U (en) Pipe-following drilling system suitable for drilling in gravel stratum

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20180619