CN209603913U - Oil well tubing string cutter device - Google Patents

Abstract

The utility model is a kind of oil well tubing string cutter device, including main shaft, it is arranged with cutting part with being able to rotate on the outer wall of the main shaft, the cutting part includes that can radially wobble tool arm that is flexible and can rotating in a circumferential direction, and setting can cut stroke knife of oil well down-hole string from internal rotating on the tool arm；The top connection setting of the main shaft can drive the driving portion of the main shaft rotation, and the oil well tubing string cutter device further includes the control unit being set on ground, and the control unit is electrically connected with the driving portion.The oil well tubing string cutter device can be reduced well workover construction procedure when tubing string card well, reduce the well workover time, reduce workover cost, reduce staff labor intensity.

Description

Oil well tubing string cutter device

Technical field

The utility model relates to petroleum works technical fields, more particularly to one kind to be used for oil well tubing string failure well workover institute Oil well tubing string cutter device.

Background technique

With going deep into for oil field development, the extension of oil well production time, oil well failure increases, and one of failure is The tubing string of tripping in well deep part is stuck in well, causes oil well that cannot recover the oil production, and common card tubing string failure has: first is that oil well Layer shakes out card tubing string, and the tubing string of G.I.H can be buried several hundred rice by reservoir sand, cause down-hole string by the serious oil well that shakes out Ka Jing；Second is that well deep part casing deformation card tubing string, casing deformation mostly occurs in the viscous crude of steam soak exploitation, special thick oil, surpasses Viscous crude, high-solidifiability oil field generate destruction to oil well casing, make oil well casing when injecting high temperature and high pressure steam to oil-well strata Deformation causes down-hole string Ka Jing；Third is that downhole tool failure card tubing string, such as；With the envelope of oil well pipe tripping in well deep part together Down-hole string Ka Jing is caused since packer failure is stuck on oil well casing every device.

In the prior art, after oil well tubing string Ka Jing, since the limit tonnage pulled out on flow string is limited, common well workover Tubing string can not be extracted, workover is needed to construct, the step method of workover construction processing tubing string card well failure is；With anti- A kind of card piping tool on the powerful drilling rod band of pulling force, is inserted in card piping tool on card well casing column, makes drilling rod back-off rotation with power, Card well casing column can lay down a section tubing string after some box cupling of top is held and buckled, and a section tubing string is laid down in proposition, and by repeating, n times are above-mentioned to be applied It, will be on tubing string with dynamic rotation drilling rod with abrasive drilling tool a kind of on drilling rod band after reaching that root canal that stuck point exposes after work Box cupling grind off after, rise drilling rod change tool, with the fishing socket tool that stretching resistance is powerful a kind of on drilling rod band, G.I.H makes Fishing socket tool is inserted on card well casing column, is extracted card well casing column with large-tonnage power.This construction technology has the following problems: A, being buckled to card release well casing column, to be repeated lower tubular column number too many, and it is too long to expend the well workover time, increases workover cost, increases Staff labor intensity；B, under abrasive drilling box cupling needs, a drilling rod is played, it is also necessary to abrasive drilling time and cost.

The present inventor based on years of experience and practice in relevant industries, proposes that a kind of oil well tubing string is cut as a result, Device is cut, to overcome the deficiencies of existing technologies.

Utility model content

The purpose of this utility model is to provide a kind of oil well tubing string cutter devices, overcome existing in the prior art Card well casing column extracts the problems such as difficult, the well workover process cumbersome time is long, which can be reduced tubing string card Well workover construction procedure when well reduces the well workover time, reduces workover cost, reduces staff labor intensity.

The purpose of this utility model is achieved in that a kind of oil well tubing string cutter device, including main shaft, the master It is arranged with cutting part with being able to rotate on the outer wall of axis, the cutting part includes that can radially wobble knife that is flexible and can rotating in a circumferential direction Arm, what setting can cut oil well down-hole string from internal rotating on the tool arm draws knife；The top connection setting energy of the main shaft The driving portion of the main shaft rotation is driven, the oil well tubing string cutter device further includes the control unit being set on ground, The control unit is electrically connected with the driving portion.

In a better embodiment of the utility model, external thread part, the master is arranged in the outer wall lower part of the main shaft The lower seal of axis is arranged with axial stretching cylinder, and setting and the external thread part are matched interior on the inner wall of the axial stretching cylinder Threaded portion, the axial stretching cylinder can be along the main shaft axial direction telescopic movings；The bottom end connection setting energy of the axial stretching cylinder The tool arm slide groove being inclined to set is arranged on the side wall of the sliding block in the sliding block for pushing the bottom of the tool arm to radially wobble, The bottom of the tool arm is located in tool arm slide groove, and the side wall of the bottom sidewall of the tool arm and the tool arm slide groove against The bottom of contact, the tool arm can be slided along the tool arm slide groove and diameter is put outward.

In a better embodiment of the utility model, the spherical setting in the bottom end of the main shaft constitutes main shaft ball bottom, Setting can be from axial stretching cylinder described in sealed bottom from the down-set sliding block slot in top, the sliding block slot on the sliding block End enclosure structure, the spherical setting in the top of the end enclosure structure constitutes end socket top dome, and the end socket top dome can be with the axial direction Retracting cylinder moves up axial contact on main shaft ball bottom.

In a better embodiment of the utility model, the end enclosure structure includes being sealedly attached to the axial stretching End socket through-hole up and down is arranged on the end socket for the end socket of cylinder bottom, and sealing wears setting-up screw in the end socket through-hole, The top of the setting-up screw constitutes the end socket top dome, is located at below the end socket on the setting-up screw and is arranged locking screw It is female.

In a better embodiment of the utility model, the top turning set of the main shaft is equipped with moving axis set, described dynamic Tool arm slot is arranged in the lateral wall bottom of axle sleeve, and the top of the tool arm is articulated in the tool arm slot；

The top that the outer wall of the main shaft is located at moving axis set is arranged the dead axle set that can be still in well, and the main axis is worn The dead axle set is crossed, the top of the dead axle set is fixedly connected with the driving portion, and the output shaft of the driving portion, which extends downwardly, to be set It sets and can be fixedly connected with the top of the main shaft, the top of the driving portion is fixedly connected with continuous steel pipe.

In a better embodiment of the utility model, circumferentially spaced setting energy and well on the outer wall of the dead axle set Wall friction against centralizer.

In a better embodiment of the utility model, down-set first deep gouge in top of the dead axle set is described For the output shaft of driving portion with the top of the main shaft by being fixedly connected to wheel and flat key, described pair of wheel and the flat key are located at institute It states in the first deep gouge；Locked nut and suspension nut, the bottom of the suspension nut are removedly connected on the outer wall of the main shaft The slot bottom of face and first deep gouge rotates contact.

In a better embodiment of the utility model, down-set second deep gouge in top of the moving axis set is described Oilless bearing is set in the second deep gouge, and oilless bearing inner ring sleeve is set on the main shaft, and oilless bearing exterior ring cap is set to described the In two deep gouges, the oilless bearing outer ring includes the upper half-turn and lower branch of split settings, and energy is arranged in the top of the moving axis set From the oilless bearing fixed ring of the fixed upper half-turn in top.

In a better embodiment of the utility model, the tool arm hinge hole of the top setting perforation of the tool arm, institute It states tool arm and is articulated in tool arm slot by the way that the tool arm articulated shaft of the tool arm hinge hole can be passed through.

In a better embodiment of the utility model, the top of the tool arm is located at the top of the tool arm hinge hole Setting swings reset portion, and the flat setting reset spring of the tool arm trough inner water, one end of the reset spring and the swing reset The setting of portion's contact.

In a better embodiment of the utility model, the driving portion is deep diving motor, the top of the deep diving motor Portion's fixed connection and sealing end cap, the top setting of the end cover are sheathed on the reinforcing pipe of continuous steel pipe bottom, the deep diving The cable of motor passes through continuous steel pipe and is electrically connected with the control unit.

From the above mentioned, oil well tubing string cutter device provided by the utility model has the following beneficial effects:

In oil well tubing string cutter device provided by the utility model, knife circumgyration incision oil well is drawn by tool arm bottom Down-hole string reduces " back-off card lifting well casing column " and " abrasive drilling box cupling " working procedure in the prior art, avoids repeatedly rising repeatedly Lower tubular column reduces well workover construction procedure when tubing string card well, reduces the well workover time, reduces workover cost, and it is strong to reduce employee's labour Degree；

In oil well tubing string cutter device provided by the utility model, the bottom of tool arm can be slided along tool arm slide groove and Diameter is put outward, draws knife when scraping is stuck in the oil well tubing string in well, and the slot bottom of tool arm slide groove bears to draw the radial work of knife Firmly, it avoids drawing cutter diameter to inside contracting, draws the side wall that knife stress point of suffered circumferential direction active force in scraping is located at tool arm slide groove On, guarantee the stability of scraping process；

In oil well tubing string cutter device provided by the utility model, pass through spherical surface knot between axial stretching cylinder and main shaft Structure realizes axial limiting, and the contact limit of spherical structure reduces the frictional resistance of contact limit, can guarantee main shaft and end socket Structure is freely separating；

In oil well tubing string cutter device provided by the utility model, by adjusting the position of setting-up screw, axis is adjusted To the axial contact distance of retracting cylinder and main shaft, so that the aperture adjustment for drawing knife, tool arm in setting data is realized, so that control Portion is able to achieve the control of edge of a knife data, and when being conveniently suitable for various working, while avoiding direct cutting, oil well tubing string exists The flexible deformation damage device generated when disconnection；

In oil well tubing string cutter device provided by the utility model, moving axis set can be relatively main under the drive of tool arm Axis is rotated, realize tool arm, axial stretching cylinder with respect to main shaft coaxial unusual fluctuation；When axial stretching cylinder is with respect to principal shaft locking, knife Arm, axial stretching cylinder can be rotated synchronously with main shaft, realize that tool arm, axial stretching cylinder are coaxial with moving with respect to main shaft, this is practical Novel oil well tubing string cutter device realizes that tool arm, axial stretching cylinder are opposite according to active force suffered by knife and tool arm is drawn The coaxial unusual fluctuation of main shaft and coaxial same dynamic automatic conversion.

Detailed description of the invention

Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model It encloses.Wherein:

Fig. 1: for the cross-sectional view of the oil well tubing string cutter device of the utility model.

Fig. 2: for the top view of the sliding block of the utility model.

Fig. 3: the cross-sectional view at spring eye is placed on for the moving axis of the utility model.

Fig. 4: the cross-sectional view at tool arm hinge hole is placed on for the moving axis of the utility model.

Fig. 5: for the bottom view of the moving axis set of the utility model.

Fig. 6: for the top view of the moving axis set of the utility model.

Fig. 7: for the top view to wheel of the utility model.

Fig. 8: for the bottom view to wheel of the utility model.

Fig. 9: for the bottom view of the dead axle set of the utility model.

Figure 10: for the top view of the dead axle set of the utility model.

Figure 11: for the side view of the centralizer of the utility model.

Figure 12: for the top view of the centralizer of the utility model.

Figure 13: for the status diagram before the oil well tubing string cutter device G.I.H cutting of the utility model.

Figure 14: status diagram when being cut for the oil well tubing string cutter device G.I.H of the utility model.

Figure 15: for enlarged drawing in Figure 14 I.

In figure:

100, oil well tubing string cutter device；1, sliding block；2, tool arm slide groove；3, knife is drawn；4, tool arm；5, axial stretching Cylinder；6, main shaft；7, sealing ring；8, tool arm articulated shaft；9, spring eye；10, reset spring；11, interior wire hole；12, hexagon socket head cap screw； 13, centralizer fixation hole；14, centralizer；15, dead axle set；16, gasket；17, deep diving motor；18, end cover；19, it reinforces Pipe；20, continuous steel pipe；21, cable；22, motor attaching nut；23, motor connects bolt；24, output shaft；25, flat key；26, Rectangular buffer stopper；27, to wheel；28, nut is locked；29, nut is hung；30, thrust bearing；31, seal ring；32, airtight and watertight padding list Member；33, positioning shaft sleeve；34, upper half-turn；35, lower branch；36, oilless bearing inner ring；37, moving axis set；38, oilless bearing chamber； 39, tool arm slot；40, end socket；41, setting-up screw；42, locking nut；43, sliding block slot；44, tool arm hinge hole；45, end socket ball Top；46, main shaft ball bottom；47, oilless bearing fixed ring；48, box cupling；49, reel；50, control panel；51, engineering truck；52, oil well Down-hole string；53, oil well casing；54, production rig；55, hanging ring；56, reservoir sand；57, elevator；58, the edge of a knife.

Specific embodiment

For a clearer understanding of the technical features, objectives and effects of the utility model, now compareing Detailed description of the invention Specific embodiment of the present utility model.

Shown in Fig. 1 to Figure 15, the utility model provides a kind of oil well tubing string cutter device 100, including main shaft 6, main It is arranged with cutting part with being able to rotate on the outer wall of axis 6, cutting part includes that can radially wobble tool arm 4 that is flexible and can rotating in a circumferential direction, Setting can draw (stroke knife 3 of knife 3 from internal (inside of oil well tubing string 52) circumgyration incision oil well tubing string 52 on tool arm 4 The oil well tubing string 52 of scraping is the position being caught in well), in the present embodiment, draws knife 3 and be welded on tool arm 4；Main shaft 6 Top connection setting can driving spindle 6 rotate driving portion, oil well tubing string cutter device 100 further includes being set to ground On control unit, control unit is electrically connected with driving portion.In a specific embodiment of the utility model, cutting part includes circumferentially 3 tool arms 4 of uniform intervals setting, the bottom of each tool arm 4 extend radially outward one above-mentioned stroke of knife 3 of setting respectively；Control Portion is made of the control panel 50 on ground on engineering truck 51.

In oil well tubing string cutter device provided by the utility model, knife circumgyration incision oil well is drawn by tool arm bottom Down-hole string reduces " back-off card lifting well casing column " and " abrasive drilling box cupling " working procedure in the prior art, avoids repeatedly rising repeatedly Lower tubular column reduces well workover construction procedure when tubing string card well, reduces the well workover time, reduces workover cost, and it is strong to reduce employee's labour Degree.

Further, as shown in Figure 1, external thread part is arranged in the outer wall lower part of main shaft 6, the lower seal of main shaft 6 is arranged with axis To retracting cylinder 5, in the present embodiment, sealing ring 7 is set between the upper inside wall of axial stretching cylinder 5 and the outer wall of main shaft 6, it is close Seal 7 is rubber product；Setting and the matched internal thread part of external thread part, 5 energy of axial stretching cylinder on the inner wall of axial stretching cylinder 5 It is moved along 6 axial stretching of main shaft；The sliding block that the bottom end connection setting of axial stretching cylinder 5 can push the bottom of tool arm 4 to radially wobble 1, the tool arm slide groove 2 being inclined to set is set on the side wall of sliding block 1, the bottom of each tool arm 4 is located at a tool arm slide groove 2 It is interior, and the side wall abutting contact of the bottom sidewall of tool arm 4 and tool arm slide groove 2, the bottom of tool arm 4 can be sliding along tool arm slide groove 2 Dynamic and diameter is put outward.Knife 3 is drawn when scraping is stuck in the oil well tubing string in well, the slot bottom of tool arm slide groove 2 bears to draw knife 3 Radial forces avoid stroke knife 3 is radial from inside contracting, and draw the stress point of suffered circumferential direction active force in scraping of knife 3 and are located at tool arm slideway On the side wall of slot 2, guarantee the stability of scraping process.

Further, as shown in Figure 1 and Figure 2, the spherical setting in the bottom end of main shaft 6 constitutes main shaft ball bottom 46, pushes up certainly on sliding block 1 The down-set sliding block slot 43 in portion, the interior setting of sliding block slot 43 can be from the end enclosure structure of sealed bottom axial stretching cylinder 5, end socket knot The spherical setting in the top of structure constitutes end socket top dome 45, and end socket top dome 45 can move up axial contact in main shaft with axial stretching cylinder 5 On ball bottom 46.End socket top dome 45 moves up contact when on main shaft ball bottom 46, and the stopping of axial stretching cylinder 5 moves up, the top of spherical structure The frictional resistance for reducing contact limit to limit can guarantee being freely separating for main shaft 6 and end enclosure structure.

As shown in Figure 1, in the present embodiment, end enclosure structure includes the end socket for being sealedly attached to 5 bottom of axial stretching cylinder 40, end socket through-hole up and down is set on end socket 40, and sealing wears setting-up screw 41, the top of setting-up screw 41 in end socket through-hole Portion constitutes end socket top dome 45 above-mentioned, and end socket sealing ring, setting-up screw 41 are arranged between the top and end socket 40 of setting-up screw 41 The upper lower section positioned at end socket 40 is arranged locking nut 42.By adjusting the position of setting-up screw 41,5 He of axial stretching cylinder can be adjusted The axial contact distance of main shaft 6 enables control unit real to realize the aperture adjustment for drawing knife 3, tool arm 4 in setting data The control of existing edge of a knife data, when being conveniently suitable for various working, while avoiding direct cutting, oil well tubing string is when disconnecting The flexible deformation of generation damages device.

It is main when driving portion driving spindle 6 is rotated in the forward direction and (can be set as according to the actual situation clockwise or counterclockwise) Axis 6 drives axial stretching cylinder 5 and tool arm 4 to rotate, since (prior art, can be water to liquid, and maintenance construction is infused when preparing in well Enter in oil well tubing string) drag effect is generated to tool arm 4, the velocity of rotation of main shaft 6 is faster than axial stretching cylinder 5 and tool arm 4 Velocity of rotation, main shaft 6 are upper buckle-like state, the opposite main shaft 6 of the sliding block 1 of axial stretching cylinder 5 and its bottom relative to axial stretching cylinder 5 It moves up, the slot bottom of tool arm slide groove 2 pushes the bottom diameter of tool arm to put outward at this time, draws and is flapped toward in oil well tubing string 52 outside knife 3 Wall is close, and resistance further increases after drawing knife 3 and touching oil well pipe string internal wall, is in axial stretching cylinder 5 with main shaft 6 Tightening state (axial stretching cylinder 5, which temporarily ceases, to be moved up), main shaft 6, axial stretching cylinder 5, tool arm 4 and a stroke knife 3 constitute relatively fixed Entirety, main shaft 6 drive draw a 3 synchronous rotary scraping oil well tubing string of knife.With draw 3 scrape depth of knife increase, main shaft 6 Velocity of rotation is faster than the velocity of rotation of axial stretching cylinder 5 and tool arm 4, and main shaft 6 is upper buckle-like state, axis relative to axial stretching cylinder 5 Continue opposite main shaft 6 to retracting cylinder 5 and its sliding block of bottom 1 to move up, end socket top dome 45 moves up contact when on main shaft ball bottom 46 (when both i.e. distance is 0) draws knife 3 and stops scraping to oil well pipe string internal wall, form the edge of a knife 58, at this time driving portion load Reduce, reflects scraping completion status in control unit, control unit control driving portion stopping rotates in the forward direction.

Further, as shown in Fig. 1, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, the top turning set of main shaft 6 is equipped with moving axis set 37, moving axis Tool arm slot 39 is arranged in the lateral wall bottom of set 37, and the top of tool arm 4 is articulated in tool arm slot 39；

The top that the outer wall of main shaft 6 is located at moving axis set 37 is arranged the dead axle set 15 that can be still in well, in present embodiment In, as shown in Fig. 9, Figure 10, Figure 11, Figure 12, on the outer wall of dead axle set 15 circumferentially spaced setting energy and wall friction against Centralizer 14 is arranged horizontally disposed centralizer fixation hole 13 on centralizer 14, wears connection bolt in centralizer fixation hole 13 Centralizer 14 is fixedly connected on the outer wall of dead axle set 15.Centralizer 14 is rubber product, centralizer 14 and oil well pipe There are frictional resistances between column wall, and dead axle set 15 is made to remain static.Main shaft 6 turns through dead axle set 15, dead axle set 15 Top be fixedly connected with driving portion, the output shaft 24 of driving portion extends downwardly setting and can be fixedly connected with the top of main shaft 6, drive The top in dynamic portion is fixedly connected with continuous steel pipe 20.

Further, as shown in figs. 1,7 and 8, down-set first deep gouge in top of dead axle set 15, the output of driving portion Axis 24, by being fixedly connected to wheel 27 and flat key 25, is located in the first deep gouge wheel 27 and flat key 25 with the top of main shaft 6；At this In embodiment, rectangular buffer stopper 26 is set between the output shaft 24 of driving portion and the top of main shaft 6, wheel 27 is passed through to wheel 27 Stabilization is withheld between the output shaft 24 of driving portion and the top of main shaft 6, and rectangular buffer stopper 26 is nylon products.Outside main shaft 6 It is removedly connected locked nut 28 on wall and suspension nut 29 (locks nut 28 and suspension nut 29 is threadingly attached to lead On the outer wall of axis 6), the slot bottom of the bottom surface and the first deep gouge that hang nut 29 rotates contact.

Further, as shown in Figure 1, down-set second deep gouge in top of moving axis set 37, the interior oil-free axis of setting of the second deep gouge It holds, the second deep gouge constitutes oilless bearing chamber 38, and oilless bearing inner ring 36 is sheathed on main shaft, and oilless bearing exterior ring cap is set to the In two deep gouges, oilless bearing outer ring includes the upper half-turn 34 and lower branch 35 of split settings, and the top setting of moving axis set 37 can be certainly The oilless bearing fixed ring 47 of the fixed upper half-turn in top.Oilless bearing inner ring 36, the upper half-turn 34 of oilless bearing outer ring and lower half Circle 35 is synthesis copper product.

As shown in Figure 1, in the present embodiment, the bearing accommodation groove that the slot bottom setting of the first deep gouge is sunk, the bearing Thrust bearing 30 is set in accommodation groove, and the foundation ring contact of thrust bearing 30 is in the slot bottom of bearing accommodation groove, the top of thrust bearing 30 It encloses contact and is arranged seal ring 31 in the bottom surface of suspension nut 29, on main shaft 6, seal ring 31 is fixed on bearing appearance by hexagon socket head cap screw 12 (interior wire hole 11 is arranged in the slot bottom of bearing accommodation groove, and hexagon socket head cap screw 12, which is capable of fixing, to be connected in interior wire hole 11), thrust are set in slot The radially inner side of bearing 30 is positioned by 31 contact of seal ring, the side wall of the outer wall of thrust bearing 30 and bearing accommodation groove against.

The position being located between suspension nut 29 and oilless bearing inner ring 36 on main shaft 6 is arranged positioning shaft sleeve 33, seal ring 31 Inner wall and positioning shaft sleeve 33 outer wall between seal contact, positioning shaft sleeve 33 is connected on main shaft 6 by positioning key, locating shaft Airtight and watertight padding unit 32 is filled between the inner wall of outer wall and the dead axle set 15 of set 33, airtight and watertight padding unit 32 is nylon system Sleeve sealing circle is arranged in product between the inner wall and main shaft 6 of positioning shaft sleeve 33.

Under the action of oilless bearing, moving axis set 37 can be rotated under the drive of tool arm 4 relative to main shaft 6, realize knife The coaxial unusual fluctuation of the opposite main shaft 6 of arm 4, axial stretching cylinder 5；When axial stretching cylinder 5 is locked with respect to main shaft 6, tool arm 4, axial stretching Cylinder 5 can be rotated synchronously with main shaft 6, realize that tool arm 4, axial stretching cylinder 5 are coaxial same dynamic with respect to main shaft 6, the utility model Oil well tubing string cutter device 100 realizes tool arm 4,5 phase of axial stretching cylinder according to active force suffered by knife 3 and tool arm 4 is drawn Coaxial unusual fluctuation and coaxial same dynamic automatic conversion to main shaft 6.

Further, as Figure 1 and Figure 4, the tool arm hinge hole 44 of the top setting perforation of tool arm 4, tool arm 4 is by that can wear The tool arm articulated shaft 8 for crossing tool arm hinge hole 44 is articulated in tool arm slot 39.

As shown in Figure 1, Figure 3, in the present embodiment, the top of tool arm 4 is located at the top setting pendulum of tool arm hinge hole 44 Reset portion is moved, reset spring 10, one end of reset spring 10 and swing reset portion contact setting are horizontally disposed in tool arm slot 39.In In present embodiment, setting is in horizontal spring eye 9 on the inner wall of tool arm slot 39, and the other end of reset spring 10 is located at spring eye In 9, one end of reset spring 10 protrudes from 9 contact of spring eye in swing reset portion.Under the action of reset spring 10, tool arm 4 Bottom can bounce back and slide in tool arm slide groove 2.

Further, as shown in Figure 1, driving portion is deep diving motor 17, the top fixed connection and sealing end cap of deep diving motor 17 18, in the present embodiment, pressure sets gasket 16, gasket 16 between the top surface of deep diving motor 17 and the bottom surface of end cover 18 For nylon products；In the present embodiment, motor connecting flange is arranged in the top of deep diving motor 17, and the bottom of end cover 18 is set It sets end cover connecting flange, motor connecting flange and end cover connecting flange and bolt 23 and the company of motor attaching nut 22 is connected by motor It connects, to realize the connection of deep diving motor 17 and end cover 18.The top setting of end cover 18 is sheathed on continuous steel pipe 20 The reinforcing pipe 19 of bottom, reinforcing pipe 19 and continuous steel pipe 20 are welded to connect, and the top of reinforcing pipe 19 and end cover 18, which is welded, to be connected It connects.The cable 21 of deep diving motor 17 passes through continuous steel pipe 20 and is electrically connected with control unit, and cable 21 is copper plastic-aluminum material products.In this reality It applies in mode, gasket groove is arranged in the bottom of deep diving motor 17, gasket 16 is arranged in gasket groove, to seal deep diving Interconnecting piece between motor 17 and dead axle set 15；Motor connecting flange, the top of dead axle set 15 is arranged in the bottom of deep diving motor 17 Axle sleeve connecting flange is set, and motor connecting flange connects bolt 23 and motor attaching nut 22 by motor with axle sleeve connecting flange Connection, to realize the connection of deep diving motor 17 and dead axle set 15.

When carrying out the construction of card well servicing using the oil well tubing string cutter device 100 of the utility model, including following step It is rapid:

Step a, oil well tubing string cutter device 100 assembles:

A1, end socket sealing ring is packed into the end socket through-hole of end socket 40, sleeve sealing circle is packed into positioning shaft sleeve 33, sealing Circle 7 is packed into axial stretching cylinders 5, position will be arranged in 36 sets of oilless bearing inner ring to main shaft 6, by the loading moving axis set of lower branch 35 Main shaft 6 is penetrated moving axis set 37, upper half-turn 34 is pressed into oil-free in oilless bearing chamber 38 by 37 38 bottom of oilless bearing chamber On bearing inner ring 36, oilless bearing inner ring 36, lower branch 35 and upper half-turn 34 is made to reach bearing fit, by oilless bearing fixed ring 47 set fixed upper half-turn 34 by the top pressure that hexagon socket head cap screw is connected to oilless bearing chamber 38；The top of each tool arm 4 is cut with scissors It is connected in tool arm slot 39；

A2, the bottom that end socket 40 is sealedly attached to axial stretching cylinder 5, axial stretching cylinder 5 are sheathed on main shaft 6, root According to the internal diameter for the oil well tubing string 52 being caught in well, wall thickness, 58 depth data of the edge of a knife (the most depth of the edge of a knife 58 and oil well pipe 52 outer diameter of column will stay 1mm or so, as shown in Figure 14, Figure 15), it determines and draws 3 external-open range data of knife, according to a stroke 3 external-open distance of knife Data adjust maximum distance between 41 fixed seal head top dome 45 of setting-up screw and main shaft ball bottom 46, after regulating, use locking nut 42 lock setting-up screw 41, sliding block 1 and axial stretching cylinder 5 are carried out screwed connection, the bottom of 3 tool arms 4 in connection procedure Portion is respectively put into corresponding tool arm slide groove 2, locks screw thread；

A3, positioning key is inserted on main shaft 6 in corresponding keyway, positioning shaft sleeve 33 is placed on main shaft 6, alignment keyway is pounded To dead point, dead axle set 15 is placed on positioning shaft sleeve 33, airtight and watertight padding unit 32 is installed, seal ring 31 is fixedly mounted, by thrust axis It holds in 30 loading bearing accommodation grooves, suspension nut 29 is threadedly coupled make-up with main shaft 6, with locked nut 28 and 6 screw thread of main shaft Connection is locked, in corresponding keyway, the half alignment keyway to wheel 27 will be placed on main shaft on one end insertion main shaft 6 of flat key 25 On 6, by the other end insertion corresponding keyway of output shaft 24 of flat key 25, output will be placed on to the other half alignment keyway of wheel 27 On axis 24, rectangular buffer stopper 26 is put into in wheel 27, gasket 16 is put in, passes through that motor connects bolt 23 and motor connects Connected nut 22 connects motor connecting flange and axle sleeve connecting flange, realizes the connection of deep diving motor 17 and dead axle set 15.It will sealing Pad 16 is put in the top surface of deep diving motor 17, and cable 21 and deep diving motor 17 are completed by circuit connection, connect bolt by motor 23 and motor attaching nut 22 connect motor connecting flange and end cover connecting flange, complete deep diving motor 17 and end cover 18 Connection.

Step b, oil well tubing string cutter device 100 is constructed preceding preparation:

B1, investigate thoroughly that (in a specific operating condition, oil well tubing string 52 is stuck in oil well set for the oil well tubing string 52 that is caught in well In pipe 53, have reservoir sand 56 between oil well tubing string 52 and oil well casing 53) related data, determine oil well tubing string 52 Internal diameter, wall thickness, cut point, depth of cut；

B2, the clear water that a certain amount of (determining according to actual condition) will be poured into oil well tubing string 52；

B3, with box cupling 48 (prior art) and 52 screwed connection of oil well tubing string, well head is made it higher than, with elevator 57 (prior art) blocks box cupling 48, hangs in hanging ring 55 (prior art), with production rig 54 (prior art) to oil well Down-hole string 52, which is formed, lifts power (being greater than 52 weight of oil well tubing string).

Step c, well construction under oil well tubing string cutter device:

By engineering truck 51 (prior art) close to well mouth of oil well, raising reel 49 (prior art), will be oily to appropriate location Well down-hole string cutter device 100 is inserted by the inner cavity of box cupling 48, since centralizer 14 and the inner wall of oil well tubing string 52 have Frictional resistance is needed to be blocked continuous steel pipe 20 using booster (prior art) and reinforced downwards, and oil well tubing string cutting dress is made It sets 100 and reaches predetermined depth, state is as shown in figure 13.

Step d, oil well tubing string cutter device cutting construction:

Operation control panel 50 starts the rotating forward of deep diving motor 17 (can be set as side clockwise or counterclockwise according to the actual situation To), main shaft 6 is imparted power to by output shaft 24, since the inner wall of centralizer 14 and oil well tubing string 52 has frictional resistance, Dead axle set 15 remains static；Main shaft 6 is rotated on thrust bearing 30 by hanging nut 29；

Main shaft 6 drives axial stretching cylinder 5 and tool arm 4 to rotate, since liquid generates drag effect, main shaft 6 to tool arm 4 in well Velocity of rotation be faster than the velocity of rotation of axial stretching cylinder 5 and tool arm 4, main shaft 6 is upper buckle-like state relative to axial stretching cylinder 5, Axial stretching cylinder 5 and its sliding block of bottom 1 are moved up with respect to main shaft 6, end socket top dome 45 and 46 Distance Shortened of main shaft ball bottom, at this time knife The slot bottom of arm slide groove 2 pushes the bottom diameter of tool arm to put outward, draws that be flapped toward 52 inner wall of oil well tubing string outside knife 3 close, draws knife 3 Resistance further increases after touching oil well pipe string internal wall, so that axial stretching cylinder 5 and main shaft 6 is in tightening state (axial Retracting cylinder 5, which temporarily ceases, to be moved up), main shaft 6, axial stretching cylinder 5, tool arm 4 and a stroke knife 3 constitute relatively-stationary entirety, 6 band of main shaft Dynamic to draw 3 synchronous rotary scraping oil well tubing string of knife (coaxially same to turn state), 17 load of deep diving motor increases at this time, in control panel Instrument reflects that scraping starts state on 50.

With the increase for drawing 3 scrape depth of knife, the velocity of rotation of main shaft 6 is faster than the rotation speed of axial stretching cylinder 5 and tool arm 4 Degree, main shaft 6 are upper buckle-like states relative to axial stretching cylinder 5, and the sliding block 1 of axial stretching cylinder 5 and its bottom continues on opposite main shaft 6 It moves, end socket top dome 45 moves up contact and (when i.e. the two distance is 0), draws knife 3 when on main shaft ball bottom 46 and stop to oil well pipe The scraping of column wall forms the edge of a knife 58, and as shown in figure 14,17 load of deep diving motor reduces at this time, and instrument is anti-in control panel 50 Scraping completion status is mirrored, control panel 50 controls the stopping of deep diving motor 17 and rotates in the forward direction.

Operation control panel 50 starts deep diving motor 17 and inverts, since liquid generates drag effect, main shaft 6 to tool arm 4 in well Velocity of rotation be faster than the velocity of rotation of axial stretching cylinder 5 and tool arm 4, main shaft 6 is to move back buckle-like state relative to axial stretching cylinder 5, End socket top dome 45 and main shaft ball bottom 46 are apart from increase, and under the action of reset spring 10, the bottom of tool arm 4 is in tool arm slide groove 2 Interior retraction slides, and after tool arm 4 resets, the load restoration original state of deep diving motor 17, operation control panel 50 stops deep diving motor 17 operations.

Operation reel 49 above mentions 100 producing well down-hole string 52 of oil well tubing string cutter device, removes engineering truck 51.

Step e, the oil well tubing string 52 being caught in well breaks pipe construction:

Hydraulic tongs (prior art) are blocked into oil well tubing string 52 and are shorted (prior art), operation hydraulic tongs are made on low speed Under button rotation is several, 58 thinnest part tube wall of the edge of a knife is made to generate slight crack, remove hydraulic tongs, starting production rig 54, which gradually reinforces, to be pulled out Oil well tubing string 52 disconnects oil well tubing string 52 at the edge of a knife 58.

Step f, the oil well tubing string 52 being caught in well plays out construction:

By normal construction rapidly by oil well tubing string 52 all from well out, subsequent oil well well workover can be carried out and applied Work.

From the above mentioned, oil well tubing string cutter device provided by the utility model has the following beneficial effects:

In oil well tubing string cutter device provided by the utility model, knife circumgyration incision oil well is drawn by tool arm bottom Down-hole string reduces " back-off card lifting well casing column " and " abrasive drilling box cupling " working procedure in the prior art, avoids repeatedly rising repeatedly Lower tubular column reduces well workover construction procedure when tubing string card well, reduces the well workover time, reduces workover cost, and it is strong to reduce employee's labour Degree；

In oil well tubing string cutter device provided by the utility model, the bottom of tool arm can be slided along tool arm slide groove and Diameter is put outward, draws knife when scraping is stuck in the oil well tubing string in well, and the slot bottom of tool arm slide groove bears to draw the radial work of knife Firmly, it avoids drawing cutter diameter to inside contracting, draws the side wall that knife stress point of suffered circumferential direction active force in scraping is located at tool arm slide groove On, guarantee the stability of scraping process；

In oil well tubing string cutter device provided by the utility model, pass through spherical surface knot between axial stretching cylinder and main shaft Structure realizes axial limiting, and the contact limit of spherical structure reduces the frictional resistance of contact limit, can guarantee main shaft and end socket Structure is freely separating；

In oil well tubing string cutter device provided by the utility model, by adjusting the position of setting-up screw, axis is adjusted To the axial contact distance of retracting cylinder and main shaft, so that the aperture adjustment for drawing knife, tool arm in setting data is realized, so that control Portion is able to achieve the control of edge of a knife data, and when being conveniently suitable for various working, while avoiding direct cutting, oil well tubing string exists The flexible deformation damage device generated when disconnection；

In oil well tubing string cutter device provided by the utility model, moving axis set can be relatively main under the drive of tool arm Axis is rotated, realize tool arm, axial stretching cylinder with respect to main shaft coaxial unusual fluctuation；When axial stretching cylinder is with respect to principal shaft locking, knife Arm, axial stretching cylinder can be rotated synchronously with main shaft, realize that tool arm, axial stretching cylinder are coaxial with moving with respect to main shaft, this is practical Novel oil well tubing string cutter device realizes that tool arm, axial stretching cylinder are opposite according to active force suffered by knife and tool arm is drawn The coaxial unusual fluctuation of main shaft and coaxial same dynamic automatic conversion.

The above descriptions are merely exemplary embodiments of the present utility model, the model being not intended to limit the utility model It encloses.Any those skilled in the art, made equivalent change under the premise of not departing from the conceptions and principles of the utility model Change and modify, should belong to the range of the utility model protection.

Claims (11)

1. a kind of oil well tubing string cutter device, which is characterized in that including main shaft, cover with being able to rotate on the outer wall of the main shaft Equipped with cutting part, the cutting part includes that can radially wobble tool arm that is flexible and can rotating in a circumferential direction, and setting can be certainly on the tool arm Internal rotating cuts stroke knife of oil well down-hole string；The top connection setting of the main shaft can drive the driving of the main shaft rotation Portion, the oil well tubing string cutter device further include the control unit being set on ground, the control unit and the driving portion Electrical connection.

2. oil well tubing string cutter device as described in claim 1, which is characterized in that the outer wall lower part of the main shaft is arranged External thread part, the lower seal of the main shaft are arranged with axial stretching cylinder, on the inner wall of the axial stretching cylinder setting with it is described The matched internal thread part of external thread part, the axial stretching cylinder can be along the main shaft axial direction telescopic movings；The axial stretching cylinder The bottom end connection setting sliding block that the bottom of the tool arm can be pushed to radially wobble, inclined set is set on the side wall of the sliding block The bottom of the tool arm slide groove set, the tool arm is located in tool arm slide groove, and the bottom sidewall of the tool arm and the tool arm The bottom of the side wall abutting contact of slide groove, the tool arm can be slided along the tool arm slide groove and diameter is put outward.

3. oil well tubing string cutter device as claimed in claim 2, which is characterized in that the bottom end of the main shaft is spherical to be set It sets and constitutes main shaft ball bottom, setting can be close from bottom from the down-set sliding block slot in top, the sliding block slot on the sliding block The end enclosure structure of the axial stretching cylinder is sealed, the spherical setting in the top of the end enclosure structure constitutes end socket top dome, the end socket Top dome can move up axial contact on main shaft ball bottom with the axial stretching cylinder.

4. oil well tubing string cutter device as claimed in claim 3, which is characterized in that the end enclosure structure includes that sealing connects It is connected to the end socket of axial stretching cylinder bottom, end socket through-hole up and down is set on the end socket, in the end socket through-hole Sealing wears setting-up screw, and the top of the setting-up screw constitutes the end socket top dome, is located at the envelope on the setting-up screw The lower section of head is arranged locking nut.

5. oil well tubing string cutter device as described in claim 1, which is characterized in that the top rotation of the main shaft is arranged There is moving axis set, tool arm slot is arranged in the lateral wall bottom of the moving axis set, and the top of the tool arm is articulated in the tool arm slot；

The top that the outer wall of the main shaft is located at moving axis set is arranged the dead axle set that can be still in well, and the main axis passes through institute State dead axle set, the top of the dead axle set is fixedly connected with the driving portion, the output shaft of the driving portion extend downwardly setting and It can be fixedly connected with the top of the main shaft, the top of the driving portion is fixedly connected with continuous steel pipe.

6. oil well tubing string cutter device as claimed in claim 5, which is characterized in that along week on the outer wall of the dead axle set To interval setting can and wall friction against centralizer.

7. oil well tubing string cutter device as claimed in claim 5, which is characterized in that the top of dead axle set is to dividing into The first deep gouge is set, with the top of the main shaft by being fixedly connected to wheel and flat key, described pair is taken turns the output shaft of the driving portion It is located in first deep gouge with the flat key；Locked nut and suspension nut are removedly connected on the outer wall of the main shaft, The bottom surface of the suspension nut and the slot bottom of first deep gouge rotate contact.

8. oil well tubing string cutter device as claimed in claim 5, which is characterized in that the top of moving axis set is to dividing into The second deep gouge is set, oilless bearing is set in second deep gouge, and oilless bearing inner ring sleeve is set on the main shaft, outside oilless bearing Ring set is set in second deep gouge, and the oilless bearing outer ring includes the upper half-turn and lower branch of split settings, the moving axis The top setting of set can be from the oilless bearing fixed ring of the fixed upper half-turn in top.

9. oil well tubing string cutter device as claimed in claim 5, which is characterized in that perforation is arranged in the top of the tool arm Tool arm hinge hole, the tool arm by can pass through the tool arm hinge hole tool arm articulated shaft be articulated in tool arm slot.

10. oil well tubing string cutter device as claimed in claim 9, which is characterized in that the top of the tool arm is located at institute The top setting for stating tool arm hinge hole swings reset portion, and the tool arm trough inner water is flat to be arranged reset spring, the reset spring One end and the swing reset portion contact are arranged.

11. oil well tubing string cutter device as described in claim 1, which is characterized in that the driving portion is deep diving motor, The top setting of the top fixed connection and sealing end cap of the deep diving motor, the end cover is sheathed on continuous steel pipe bottom Reinforcing pipe, the cable of the deep diving motor pass through continuous steel pipe and are electrically connected with the control unit.