CN87205282U - Ensemble telescopic tools for changing drill bits at the bottom of the well hole - Google Patents

Abstract

The utility model discloses an ensemble telescopic tools for changing drill bits at the bottom of the well hole which is used for drilling of the core drilling and is aimed at the defect of the structural principle existing in the prior art scheme and has simple structure and reliable operation. The device is characterized in that the ensemble telescopic tools for changing drill bits at the bottom of the well hole is provided with a drill bit replacing mechanism which has simple structure and agile, dependable action, an aimed positioning mechanism, a driving mechanism and has automatic start and locking functions. The device can simplifies the process of replacing the drill bit, improves the drilling speed and enlarges the range of application of the technology that the drill bit is exchanged without withdrawing the drill.

Description

Ensemble telescopic tools for changing drill bits at the bottom of the well hole

The utility model is a kind of device that is used in the core drilling boring.

The sixties rise, and the brill bit change technical scheme of not carrying of external different types occurs in succession.So far, except that reaming wing divergent-convergent type drilling tool has had certain industrial utility value, as China patent CN85200563U, the drilling tool scheme of other pattern is still in development is explored.With regard to the structural principle of instrument, optimally in all kinds of drilling tools to first elect comprehensive telescopic drilling tool scheme.Reaming wing divergent-convergent type drilling tool is that two-stage is bored broken rock because of it, and not only broken scar is long-pending big, bore and imitate low (particularly hard rock), and rock core is little, and drilling tool series incomplete (disappearance φ 59 bore drilling tools), its application prospect is subjected to a lot of restrictions.So people's notice focuses on that development is more rational on a kind of structural principle, at the bottom of comprehensive telescopic hole that bigger practicality and economic benefit prospect are arranged on the bit change instrument.

Now, attempt to be used for bit change instrument at the bottom of comprehensive telescopic hole of small-bore geological core drilling, it is bit change instrument at the bottom of the solid drill telescopic hole that a kind of technical scheme is arranged, as U.S. Pat P1981, and 8,4,4281722; But this instrument is too complicated because of structure, and machining difficulty, reliability are not high, are not easy to operation yet, drops into the industry practicality as yet.

The problem that the utility model is intended to exist at above-mentioned instrument proposes new technical scheme, design and manufacture a kind of bit change instrument at the bottom of the whole telescopic hole that the small-bore diamond core drilling of geological prospecting uses that is suitable for the practical prospect of bigger industry, it need not to make a trip, and just can regularly the military service drill bit directly be checked or change.

Fig. 1 a, b, Fig. 2 a, b are in the segmentation elevation of installing and reclaiming drill bit state respectively after the assembling of this instrument;

Fig. 3 a, b, Fig. 4 a, b are respectively that the segmentation that this instrument is in the down-hole equipment pipe nipple of the state of creeping into is faced and lateral view;

Fig. 5,6,10---the 14th, A among Fig. 1, Fig. 2 and Fig. 4---sectional drawings such as A;

Fig. 7---9 be that drill bit is faced respectively, side-looking and vertical view;

Figure 15, Figure 16, Figure 17 (Figure 17 a, b are two similar structures), Figure 18 be respectively outer, in, the local outwardly deploying figure of interior sheave pipe and pintle hook lock tube;

Figure 19 is F among Figure 10---the F sectional drawing;

Figure 20 is the input ring figure of the bit change-over instrument of this instrument;

Figure 21 a, b, c and Figure 22 a, b are respectively the installations of the another kind of similar structures of this instrument and reclaim state diagram.

The utility model divides down-hole equipment pipe nipple assembly, bit change-over instrument assembly and replacing instrument to throw in three parts of ring. Its down-hole equipment pipe nipple is used as replacing instrument guiding, location and drill bit lock even and is crept into; The replacing instrument is used as the drill bit disassembling, assembling and replacing; Throwing in ring then doubles as the assembling of replacing instrument and goes into the well input usefulness. This instrument is made by metal material except drill bit and reaming pipe local surfaces mosaic diamond.

Down-hole equipment pipe nipple assembly (Fig. 3,4) for making the processing of its gathering sill, actual is divided into two by guide pipe 17(), reaming pipe 24 and drill bit 28(Fig. 7,8,9) and be set in pintle hook lock tube 23 and pintle hook lock tube positioning reed 40(Fig. 4,6 in the reaming pipe) form; The down-hole equipment pipe nipple links to each other with common cord coring drill (not shown) again, thereby forms practical down-hole equipment.Down-hole equipment only proposes the face of land when needs pull out of hole except that drill bit.

Drill bit 28 is a monolithic simple structure, and it is the special-shaped annulus (as Fig. 7,8,9) that there is symmetrical otch plane both sides, and each is unequal for its three-dimensional space size: X＞Y＞Z; When with the Y-axis being rotating shaft when its X-axis being gone to overlap (repeatedly contracting) with the Z axle, drill bit can be come in and gone out by drill pipe bore, provides the basis for changing at the bottom of the hole of drill bit.

During the assembling of down-hole equipment pipe nipple, guide pipe is with directed linking to each other between the reaming pipe, and it connects orientation and decides with the orientation of the drill bit plug receptacle of reaming pipe according to guide pipe inwall gathering sill 51.Engage secondary and lock by " embedding ", " tenon " between reaming pipe and drill bit and connect secondary realization being connected each other (Fig. 5); Its " embedding " connects pair and is made up of the clamp bar 52 of reaming pipe and the jaw plane 53 of drill bit; " tenon " connects the arc bump 54 that secondary its exterior arc surface by the reaming pipe is the extension of reaming pipe periphery and forms with only the groove of arc 55 on drill bit cylindrical top; The pintle hook lock pawl 56 of pintle hook lock tube and the arc translot 57 of drill bit are then formed its lock and are connected pair, and the conversion (Fig. 6) of positioning reed 40 memory pintle hook lock tube positions is arranged.

During down-hole equipment work,, bear and creep into and reaming by the diamond layer 58,62 of drill bit and reaming pipe; By reaming inside pipe wall projection 59(Fig. 3) power that puts off of core sampler is provided.In addition, the condition that projection 59 is gone back and guide pipe provides guiding and locate for the bit change-over instrument together.

The bit change-over instrument is decided mechanism, driving mechanism, mechanism for opening/closing and drill bit disassembling, assembling and replacing actuating unit (being called for short more changing device) and is formed by taking aim at; It comprises removes the whole parts (difference of Fig. 1, Fig. 2 two figure is to replace the part 11 of Fig. 1 with part 38 among Fig. 2, and increases part 4,12 and 37) that belong to the down-hole equipment pipe nipple among Fig. 1, Fig. 2.Change the tool changing drill bit when (referring to reclaim and install drill bit),, throw in, go into the well by deadweight through drill pipe bore by throwing in the ring assembling, and by take aim at decide mechanism by concentrate one's gaze on the location with tool lock in the down-hole equipment pipe nipple, and the triggering mechanism for opening/closing moves; Continue it, mechanism for opening/closing makes driving mechanism separate card start-up; And then, driving mechanism by the elastic force of self spring or power drive bit change-over device that fisher provides by bit change-over program change drill bit; At last, salvage by fisher.

Take aim at and decide mechanism and decide joint 8 by taking aim at, upper and lower taking aim at decided bullet card assembly (contain bullet card 9,15, play deck 10,13 and spring 14), opens and closes pipe 11(or 38) and starting spring 6 form; Making the replacing instrument concentrates one's gaze on location and locking and triggers mechanism for opening/closing startup usefulness.Take aim at and decide to connect on the joint sleeve 2, connect outer groove-wheel pipe 18 down; Its both sides cross-drilled hole setting is taken aim at and is decided the bullet card assembly, and axially extending bore inserts and opens and closes pipe 11(or 38) and starting spring 6; Open and close pipe and be funnel-form, pipe shaft has annular groove 74,75, takes aim to decide can stretch into when the bullet card is huddled up to take aim at and decides the joint axially extending bore and snap in annular groove and connect with opening and closing the interlocking of pipe phase.Take aim at when deciding mechanism's work, bullet card is carried out and is concentrated one's gaze under it, upper and lower bullet card is finished the location jointly, take aim at " spiral (half helical pitch)---straight line " the gathering sill 51(Fig. 3,4 that decides bullet card and down-hole equipment guide pipe) constitute and concentrate one's gaze on locating pair, when the replacing instrument is gone into the well, the bullet card slips in the gathering sill, and is led by gathering sill, and taking aim at outer groove-wheel pipe of deciding joint 8 and linking to each other with its orientation is that quilt is seated on the reaming pipe 24 inwall projections 59 in the orientation in accordance with regulations.When concentrating one's gaze on the location and finishing, take aim at and decide the bullet card and from annular groove, skid off in pairs, open and close pipe, move by taking aim at its unslotted section simultaneously and decide the bullet card promptly by unfreezing and axially displacement under the starting spring effect, counter make to take aim at decide bullet card (that is instrument itself) and lock in the down-hole equipment.

Driving mechanism is made up of spear-head 1, sleeve 2, drive rod 3, driving spring 4 and nut 12, for bit change-over device provides driving (Fig. 1,2).The power of driving mechanism, when drill bit is installed directly from the rope salvaging device to upper pulling force (Fig. 1); When reclaiming drill bit then both can from spring 4 to down spring (Fig. 2), also can be from the downward impact force of rope salvaging device, perhaps simultaneously from both; Driving force by spearhead via passing to the more Geneva mechanism of changing device under the drive rod (or directly passing through drive rod).Drive rod is carried out pintle hook lock and start-up control by mechanism for opening/closing.

Mechanism for opening/closing is made of the pars infundibularis 77 of upper flange 5, steel ball 7, drive rod 3 and keying pipe, make the pintle hook lock of driving mechanism and start to use, drive rod 3 is a T shape stock, shaft has annular groove 78,79 and 80, it is from upper flange 5 and open and close pipe 11(or 38) heart hole intert and descend, by annular groove 80 with more changing device and lower flange 19 are continuous.The dish end of upper flange 5 is fixed, and sleeve end and keying pipe pars infundibularis fit; Its axle sleeve wall portion is porose, interior dress steel ball 7; The steel ball clipping is in opening and closing between pipe and drive rod, and snaps in annular groove 78 (Fig. 1) or 79(Fig. 2 of drive rod for opening and closing the pipe constraint) in drive rod is pinned.Drive rod is when opening and closing tubular axis to displacement, and invar ball 7 loses constraint and causes the unfreezing of himself and the startup of driving mechanism.When changing end-of-job, when drive rod reclaims drill bit by release link 37() or lower flange 19(when drill bit is installed) make and open and close pipe and reset and take aim at and decide the unfreezing of bullet card, and make and oneself heavyly on self another annular groove position locked by steel ball 7.

Bit change-over device is by Geneva mechanism, connecting rod, and drill holder and pintle hook lock tube controlling organization constitute, and are the executing agencies that changes the tool changing drill bit.Its sheave---linkage is the driving control volume of this device, drill holder carries out clamping to drill bit or frees under its control, and makes drill bit turn to (referring to around longitudinal axis Z), repeatedly contract (referring to around transverse axis Y) and axial combined state switching motion such as (referring to the Z axle) displacement; Simultaneously, the pintle hook lock tube turns to the control pin assembly also to work under its driving control, to cooperate finishing of bit change-over work.

Drill holder is by floating drum 29, floating plug 31, steel ball 46, upper limit bullet card 34, lower limit bullet card 47, spring 33,49 and 36 and pull bar 35(Fig. 1,10,12) form; Floating plug 31 is set in the floating drum, and has linkage pull rod 35 to make it be in the state of huddling up; The floating plug top is hinged mutually with Geneva Wheel and Linkage Mechanisms, and is controlled by sheave---linkage.Drill holder is pressed the work of ball card principle; When bit change more, it is inserted in the drill bit, can be because of the difference of floating plug position in floating drum, and clamping is arranged and free two kinds of operating modes.During clamping, floating plug pushes floating drum, and steel ball 46 is shifted to hole 60(Figure 12); During unfreezing, floating plug withdraws from, and steel ball 46 is shifted to annular groove 61(Figure 13); And there is upper and lower spacing bullet card to guarantee the stable of its state.The unfreezing of lower limit bullet card is born by tapered bar 48.

Compound sheave---linkage by interior, in, outer groove- wheel pipe 21,22 and 18, spacer pin 39, drive pin 43, flange 19, tapered bar 48 and connecting rod 27 formed (Fig. 1,2,11,14); Making drill holder clamping drilling bit and drill bit state conversion and control and pintle hook lock tube turns to controlling organization to drive usefulness.In instrument when assembling,, outer groove-wheel pipe 18 upper ends are decided joint 8 orientations and are engaged with taking aim at, and are fused by screw 16.The upper end of middle sheave pipe links to each other with drive rod 3 with flange 19 by screw 20, and therefrom obtains axial motive force, is the driving link of this mechanism; Its down end crank 69 and drill holder floating plug kingpin hole 63 be hinged, make clamper can with middle sheave pipe interlock, and provide the center of rotation that repeatedly contracts for clamper and drill bit.Interior sheave pipe lower end pin-and-hole 72 is hinged by connecting rod 27 and the eccentric pin-and-hole of drill holder floating plug, transmits channel for repeatedly contracting of drill holder provides driving force.In, in, outer groove-wheel pipe fit each other, and realize each other binding by the relevant slotted eye of each sheave pipe of insertion of drive pin 43 and spacer pin 39.When more changing device is worked, in the sheave pipe by being fixed in its pin-and-hole 68(Figure 16) in drive pin 43 insert gathering sill 65(Figure 15 of outer groove-wheel pipes) constitutes the guiding pair, the sheave pipe can be done relative motion by the form (straight line---spiral) of groove 65 defineds with respect to the outer groove-wheel pipe in making, and moves axially and rotates (pi/2 radian) around tool spindle along instrument; The state conversion and control that turns to but also move up and down about making the sheave pipe can carry out not only to drill holder with its hinge.Simultaneously, because interlock groove 70(Figure 17 of sheave pipe in the drive pin 43 on the middle sheave pipe inserts), be fixed in outer groove-wheel barrel bolt hole 66(Figure 15) on spacer pin 39 again through in channel slot 67(Figure 16 of sheave pipe) insert in stopper slot 71(Figure 17 of sheave pipe) in, thereby be subjected to the driving of drive pin 43, interior sheave Guan Tongzhong sheave pipe is in respect to outer groove-wheel pipe generation axial displacement, and is axially differential in the spacing mutual down formation of spacer pin again; This is differential passes to drill holder by connecting rod, and making drill holder can crank throw be the hinged control of repeatedly contracting again.

The pintle hook lock tube turns to controlling organization to constitute (Figure 14) by drive pin 43, control pin 44, spring 42 with snap ring 45 and relevant Geneva mechanism, makes the pintle hook lock tube and turns to control to use.Drive pin 43 has the axial step hole, and control pin 44 is loaded in it, and makes it be in the state of huddling up by spring 42 and snap ring 45.Control pin 44 is a T shape round bar, when it links with drive pin, can expand outwardly down with the variation of the constrain width of outer groove-wheel pipe gathering sill 65 and the guiding that changes the slope 64 of junction thereof, stretch into control flume 73(Figure 18 of pintle hook lock tube 23) in, the pintle hook lock tube is turned to control, finish more changing jobs of drill bit to cooperate drill holder.

Throw in ring 50(Figure 20) be circular, do the assembling of replacing instrument and throw in usefulness.Throwing in the ring has annular groove 81 and axial symmetry pod 82, orthogonal; The annulus port is horn-like.Annular groove 81 diameters are identical with drill pipe bore, thus assemble when stand-by at the replacing instrument, can retrain the replacing instrument on take aim at and decide the bullet card and be the state of huddling up.Pod and port loudspeaker then provide passage for bullet sticks into out annular groove in the ring, can be convenient to the assembling and the input of instrument.

The replacing instrument reclaims drill bit by follow procedure: instrument be the recovery state through drill pipe bore throw in go into the well → lean on from reenter drilling tool pipe nipple → lower take aim at decide the bullet card concentrate one's gaze on location → on take aim at decide bullet snap into position → drill holder and be inserted in the drill bit → open and close the pipe unfreezing and on move → take aim at decide the bullet card locked → drive rod unfreezing → driving mechanism starts → in and interior sheave pipe move down synchronously → floating plug pushes floating drum → clamper clamping drilling bit → control pin footpath outwards and move down → the pintle hook lock cylinder turn left sell to stuck-freeing drill bit → control reset → in, interior sheave pipe takes drill bit and moves down synchronously → floating plug lock in lower limit → in, the differential for the helical movement → drill bit contracting → keying pipe of turning left to and move down and change that moves down also of interior sheave pipe moves down to reset → take aim at and decides bullet card unfreezing → drive rod and weigh locked → salvaging (Fig. 2).

By follow procedure drill bit is installed: instrument be installment state go into the well enter drilling tool pipe nipple → take aim at decide the bullet card concentrate one's gaze on location → keyings manage unfreezing and move down → take aim at decide the bullet card locked → drive rod unfreezing → following fisher salvaging → in, interior sheave pipe differential upwards for the helical movement → drill bit turn right to and on move and " opening " (being upright position) by clinostatism upset → in, interior sheave pipe synchronizing shaft upwards moves → drill bit and clamper floating drum patch respectively in reaming pipe and outer groove-wheel pipe lower end → lower limit bullet card unfreezing → floating plug with in, move → control on interior sheave pipe continues the pin footpath outwards open enter in the pintle hook lock tube control flume and on move → the pintle hook lock tube turns right and sells and the keying pipe resets → takes aim at and decides bullet card unfreezing → salvaging (Fig. 1) to pintle hook lock drill bit → control.

Tool solution shown in Figure 21,22 (∏ type) and Fig. 1,2 schemes (I type) structure are similar, and its difference is that the startup of its mechanism for opening/closing is not decided the bullet card and triggered by taking aim at, but with the prosecutor formula far away of the downward impact of rope salvaging device.Its keying and taking aim at decide mechanism by spearhead 101, drive spring 102, starting bar 103, drive rod 104, take aim at decide joint 105, starting spring 106, ball card 107, interlock bullet card 108 and spring 109, buffer spring 110, pintle hook lock pin 113 and take aim at and decide the bullet card assembly and form resets; Making the start-up control of locking of instrument down-hole and driving mechanism uses.Its drive rod 104 is ┬ shape; Top is pipe, and tube wall has circular hole 184 and 183, installs interlock bullet card 108 and ball card 107 respectively; Shaft has to take aim at decides bullet card huddle up groove 180 and changing device interlock groove 182 more.Starting bar 103 also is ┬ shape, and shaft has positioning ring groove 176, interlock annular groove 175 and starts annular groove 177,178; Its top links to each other with spearhead, and the bottom inserts in the drive rod axial hole.Drive rod snaps in starting bar positioning ring groove 176 by its interlock bullet card and realizes that lock each other connects, and makes starting bar be in the axially loaded state by buffer spring 110.Take aim at and decide joint 105 axially extending bore is arranged, have lock slots 186 in the hole; In its axially extending bore of drive rod plug-in mounting, and there is ball card 107 under the constraint of starting bar, to snap in the lock slots 186 and, relends to help starting spring (Figure 21) or drive spring (Figure 22) and make drive rod be the axially loaded state the drive rod locking.Take aim at and decide the bullet card assembly and be arranged at and take aim at the both sides of deciding joint, take aim at surely before the bullet card just in time with groove 180 adjacency pairs of huddling up of drive rod, thereby can freely huddle up in groove.This mechanism go into the well take aim at fixed after, starting bar is moved down and mechanism for opening/closing is started by the downward impact force of fisher; And when changing end-of-job by the driving of driving mechanism from horizontal reset, and have the pintle hook lock of resetting pin 113 in spearhead bar reseting groove 185, to do to reset locking.

Bit change instrument at the bottom of the hole with industrial applicibility provided by the invention can be realized bit change at the bottom of the hole in geological core drilling.

The present invention creeps into form because of its down-hole equipment system with the footpath, need not reaming; So do not carry than existing reaming wing divergent-convergent type on the structural principle bore the bit change drilling tool have broken scar long-pending little, bore imitate higher, rock core is thick and can use in more small-bore (φ 59) boring.

Adopt " embedding---tenon " to engage the connected mode that adds pintle hook lock again between drill bit of the present invention and reaming pipe; This connection had both helped the design of bit change-over device, can make drilling tool that good pressure transmission, torque transmission capacity are arranged again.

The basket of down-hole equipment of the present invention props up and is seated on the reaming pipe, and the rock core during the card coring puts off advocates and will be born by the reaming pipe, and little with the drill bit relation.

Bit change-over device of the present invention adopts unique tubulose, compound Geneva Wheel and Linkage Mechanisms and drill holder to form jointly; Its Trinity, the drill bit clamping, repeatedly contract, about turn to the complex conversion of variation of axial position action to finish by a simple mechanism.This is than external (as the U.S.) patent family design, have simple in structure, part significantly reduces and moves reliable characteristics more in addition.

Center of rotation when drill bit of the present invention repeatedly contracts both overlapped with bit central, again by the drilling tool axle center, was best some position, and this selection also is better than external similar technical scheme.

Bit change-over instrument of the present invention is by the pulling of rope salvaging device, and the driving force of bit change or from steel cable more, or from spring does not simple to operately need complicated face of land ancillary service.

The present invention changes the location of concentrating one's gaze on of instrument and adopts by upper and lower and take aim at taking aim at of deciding that bullet card and " spiral---straight line " gathering sill form and decide pair and take aim at surely, and has and takes aim at the mechanism that can carry out pintle hook lock after deciding.This mechanism has identity to take aim at fixed function, and it is not subjected to the interference of other relevant slotted eye, helps concentrating one's gaze on reliably carrying out of location.

At last, it is chain to have carried out mechanism between the concentrating one's gaze on the location, open and close control of replacing instrument of the present invention, driving, the bit change-over device, thereby helps improving the reliability and the practicality of instrument.

Claims (5)

1, bit change instrument at the bottom of a kind of hole that is used in the core drilling boring, this instrument comprises the down-hole equipment pipe nipple, bit change-over instrument and replacing instrument are thrown in three parts of ring:

The down-hole equipment pipe nipple of this instrument has guide pipe, reaming pipe, drill bit and pintle hook lock tube and positioning reed thereof, and " embedding-tenon " engages to connect with pintle hook lock tube lock again and constitute practical down-hole equipment between reaming pipe and drill bit; Its guide pipe inwall is provided with gathering sill, and going into the well for the replacing instrument provides the benchmark of concentrating one's gaze on the location;

The bit change-over instrument of this instrument comprises driving mechanism, takes aim at and decides mechanism, mechanism for opening/closing and bit change-over device totally four parts; Driving mechanism is positioned at the top of instrument, and the driving force of bit change-over is passed to bit change-over device from its spear-head or driving spring via under the drive rod; Take aim at and decide joint top connection driving mechanism, the bottom connects bit change-over device, it decides the bullet card and is loaded on keying pipe in its axially extending bore (for the tool solution II, then be drive rod) and opens and closes the spring formation to take aim at and decide mechanism with being loaded on taking aim at of its both sides, is used for down-hole equipment is concentrated one's gaze on the location; Mechanism for opening/closing is positioned to take aim at decides joint axis hole upper end, and it is carried out drive rod with its steel ball and opens and closes control, and mechanism for opening/closing triggers by taking aim at the expansion action of deciding the bullet card (for the tool solution II, then by the downward impact force of rope salvaging device); Bit change-over device is made of Geneva mechanism, connecting rod, drill holder and pintle hook lock tube controlling organization, its Geneva mechanism is the control volume of this device, Geneva mechanism links to each other with drill holder by the parts of himself and by means of connecting rod, link to each other with the pintle hook lock tube of down-hole equipment by means of pintle hook lock tube controlling organization again, cause drill holder and pintle hook lock tube under its control, to carry out the disassembling, assembling and replacing operation drill bit;

The reaming pipe that is characterised in that the down-hole equipment pipe nipple of the present utility model and " tenon " between drill bit connect and secondaryly are made of the arc bump of reaming pipe lower end and only the groove of arc on drill bit top, are intended to be convenient to the raising that patches and patch intensity of drill bit; Deciding the bullet card by taking aim at of the gathering sill of the guide pipe of down-hole equipment and the instrument of replacing constitutes to take aim at and decides pair and be intended to help taking aim at and decide mechanism and take aim at the simplification of deciding operation and the raising of functional reliability; By interior, in, the compound Geneva mechanism that constitutes of outer three sheave pipes and the spacer pin that they are linked mutually, drive pin and pintle hook lock tube control pin assembly is intended to help the simplification of bit change-over device structure and the raising of functional reliability.

2,, it is characterized in that the exterior arc surface of said reaming pipe arc bump is the extension of reaming pipe periphery according to the described instrument of claim 1; Only the groove of arc on said drill bit top is connected with the drill bit periphery.

3, according to the described instrument of claim 1, the shape that it is characterized in that the gathering sill of said down-hole equipment guide pipe is " spiral (half helical pitch)---straight line ", two, by axial symmetric arrays.

4, according to the described instrument of claim 1, it is characterized in that taking aim at of said replacing instrument decide the bullet card, respectively there are two up and down, take aim at the both sides of deciding joint by radially being divided into.

5,, it is characterized in that the outer groove-wheel pipe pipe shaft of said replacing well wheel mechanism is provided with " straight line---a spiral " shape gathering sill and a spacer pin fixing hole according to the described instrument of claim 1; The sheave pipe pipe shaft that is right is provided with a channel slot and a drive pin fixing hole; Sheave pipe pipe shaft is provided with a stopper slot and the groove that axially links in said; Said drive pin is column, and during it is fixed in the drive pin fixing hole of sheave pipe, its two ends are stretched into respectively in the interlock groove of the gathering sill of outer groove-wheel pipe and interior sheave pipe; Said spacer pin is column, and the one end is fixed in the spacer pin fixing hole of outer groove-wheel pipe, the other end through in sheave tube passage groove and in stretching in the stopper slot of sheave pipe.

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