CN207934811U - A kind of drilling guidance tool and well system - Google Patents

Abstract

The utility model provides a kind of drilling guidance tool and well system, belongs to drilling tool field.Drilling guidance tool includes hollow housing, rotary shaft, hollow drill collar and driving mechanism.Hollow housing is sheathed on the outside of rotary shaft, and rotary shaft is connect with hollow housing by spherical bearing, and rotary shaft has contact surface, and contact surface is circular conical surface.Hollow drill collar is rotatably set in hollow housing, and hollow drill collar is supported in rotary shaft.Driving mechanism includes rotary body, first driving means and the second driving device, rotary body includes the first rotating ring and the second rotating ring, first driving means are for driving the first rotating ring to be rotated relative to hollow housing, and the second driving device is for driving the second rotating ring to slide axially with respect to the first rotating ring.Second rotating ring is equipped with the crowded top for being contacted with contact surface.This drilling guidance tool makes rotation bending shaft by squeezing the movement at top and being contacted with the contact surface in rotary shaft, squeezes bending of the top without limitation on rotary shaft.

Description

A kind of drilling guidance tool and well system

Technical field

The utility model is related to drilling tool fields, in particular to a kind of drilling guidance tool and well system.

Background technology

Rotary steering drilling tool is to keep rotation bending shaft bigoted by the driving mechanism between hollow housing and rotary shaft, from And an inclination angle inconsistent with borehole axis is provided for drill bit, generate guiding role.In existing rotary steering drilling tool Driving mechanism be generally used eccentric hoop, rotary sleeve is located in eccentric hoop, and eccentric hoop has the bending of rotary shaft certain Restriction effect, the bending effect of rotary shaft is poor, bad so as to cause the gap tilt effect of drill bit, and drilling well effect cannot reach pre- Phase.

Utility model content

The purpose of the present invention is to provide a kind of drilling guidance tools, have to the bending of rotary shaft to improve driving mechanism The problem of restriction effect.

The purpose of this utility model is to provide a kind of well systems, have to the bending of rotary shaft to improve driving mechanism The problem of restriction effect.

The utility model is realized in this way：

Based on above-mentioned first purpose, the utility model provides a kind of drilling guidance tool, including：

Hollow housing；

Rotary shaft, hollow housing are sheathed on the outside of rotary shaft, and rotary shaft is connect with hollow housing by spherical bearing, rotation Shaft has contact surface, and contact surface is circular conical surface；

Hollow drill collar, hollow drill collar are rotatably set in hollow housing, and hollow drill collar is supported in rotary shaft, core drill It can quickly be rotated synchronously with rotary shaft；

Driving mechanism, driving mechanism include rotary body, first driving means and the second driving device, and rotary body includes first Rotating ring and the second rotating ring, the second rotating ring are slidably connected with the first rotating ring, between the second rotating ring and the first rotating ring It is provided with the first position limiting structure, is rotated relative to the first rotating ring with limiting the second rotating ring, the first rotating ring turns with hollow housing Dynamic connection, first driving means are for driving the first rotating ring rotate relative to hollow housing, and the second driving device is for driving the Two rotating rings slide axially with respect to the first rotating ring；

Second rotating ring, which is equipped with, squeezes top, when the second driving device drives the second rotating ring axial with respect to the first rotating ring When sliding, crowded top can be moved along contact surface, so that rotation bending shaft.

Further, the first rotating ring includes basic ring and along the axially extending guide ring of basic ring, the outer wall of basic ring with it is hollow Housing is contacted and is formed and is rotatably assorted, and the second rotating ring is sheathed on the outside of guide ring, the inner wall and guide ring of the second rotating ring It contacts and is formed and is slidably matched.

Further, the first position limiting structure include set on guide ring outer wall on protrusion and set on the second rotating ring Sliding slot on inner wall, protrusion extend in sliding slot；

When second rotating ring is moved axially with respect to the first rotating ring, protrusion can slide in sliding slot.

Further, squeezing top has connecting pin and contact jaw, and connecting pin connect with the second rotating ring, contact jaw for Contact surface contacts, and squeezes top radially extending along the second rotating ring.

Further, the both ends of the second driving device are connect with crowded top and the first rotating ring respectively.

Further, hollow drill collar is equipped with limit hole, and rotary shaft is inserted in limit hole, the hole wall of limit hole and rotation There are gap, hollow drill collars to be equipped with the second position limiting structure with rotation between centers for the outer wall of axis, to limit rotary shaft with respect to hollow drill collar Rotation.

Further, the second position limiting structure includes set on multiple push rods, multiple first elastic components and in rotary shaft A plurality of circumferentially spaced card slot, push rod, the first elastic component and card slot correspond；

Card slot is slidably connected along the axial arranged of rotary shaft, push rod with hollow drill collar, and push rod can be along the diameter of hollow drill collar To sliding, the first elastic component acts on push rod, so that push rod is stuck in card slot.

Further, hollow drill collar is equipped with sealing structure with rotation between centers.

Further, sealing structure includes slide mass, fixed body and the second elastic component；

Slide mass is slidably arranged in rotary shaft, and slide mass is slidingly sealed with rotary shaft, and slide mass has the first ball Face；

Fixed body is fixed in rotary shaft；

Hollow drill collar is equipped with groove, and groove has the second spherical surface, the second elastic component act on slide mass and fixed body it Between, so that the first spherical surface and the second sphere-contact seal.

Based on above-mentioned second purpose, the utility model provides a kind of well system, including drilling machine, drill string, drill bit and above-mentioned Drilling guidance tool, one end of drill string connect with drilling machine, and the other end of drill string is connect with hollow drill collar, and drill bit connects with rotary shaft It connects.

The utility model has the beneficial effects that：

The utility model provides a kind of drilling guidance tool, and when the second driving device works, the second rotation is circumferential opposite First rotating ring slides axially, to make to drive squeeze top along rotary shaft axial movement, squeeze top by with rotary shaft Contact surface contacts, to make rotary shaft bend.When first driving means work, rotary body will surround rotary shaft and rotate, Different orientation can be located to make to squeeze top, pressure can be applied to rotary shaft from multiple directions by squeezing top movement so that rotation Shaft can bend in a plurality of directions, realize the arbitrary steering of drill bit.This drilling guidance tool is by squeezing top Moving and being contacted with the contact surface in rotary shaft makes rotation bending shaft, squeezes bending of the top without limitation on rotary shaft, it is ensured that rotation Shaft can be good at being bent so that the gap tilt effect of drill bit is more preferable.

The present invention provides a kind of well system, including above-mentioned drilling guidance tool, the institute with above-mentioned drilling guidance tool There is advantage.

Description of the drawings

It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is the structural schematic diagram for the drilling guidance tool that the embodiment of the present invention 1 provides；

Fig. 2 is the structural schematic diagram of hollow housing shown in FIG. 1；

Fig. 3 is the structural schematic diagram of hollow shaft shown in FIG. 1；

Fig. 4 is IV-IV sectional views shown in Fig. 3；

Fig. 5 is the structural schematic diagram of hollow drill collar shown in FIG. 1；

Fig. 6 is the structural schematic diagram of rotary body shown in FIG. 1；

Fig. 7 is the partial view of drilling guidance tool shown in FIG. 1；

Fig. 8 is the structural schematic diagram for the well system that the embodiment of the present invention 2 provides.

Icon：200- drilling guidance tools；The hollow housings of 10-；The first cylinders of 11-；The first spacing rings of 111-；12- transition Body；The second cylinders of 13-；The second spacing rings of 131-；20- rotary shafts；21- spindle noses；22- first shaft portions；23- tapered portion；231- connects Contacting surface；24- the second shaft portions；241- card slots；30- hollow drill collars；31- peripheral walls；32- bottom walls；33- limit holes；34- jacks；35- is pushed away Bar；The first elastic components of 36-；37- grooves；The second spherical surfaces of 38-；40- driving mechanisms；41- rotary bodies；The first rotating rings of 411-； 4111- basic rings；4112- guide rings；4113- protrusions；The second rotating rings of 412-；4121- squeezes top；The connecting pins 4122-； 4123- contact jaws；4124- sliding slots；42- first driving means；The second driving devices of 43-；50- bearings；The first glands of 60-；70- First sealing ring；80- spherical bearings；The second glands of 90-；The second sealing rings of 100-；110- sealing structures；1101- slide masses； 1102- fixed bodies；The second elastic components of 1103-；The first spherical surfaces of 1104-；300- well systems；310- drilling machines；320- drill strings；330- Drill bit.

Specific implementation mode

It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, the detailed description of the embodiments of the present invention to providing in the accompanying drawings is not intended to limit requirement below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained without creative efforts, all Belong to the range of the utility model protection.

It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.

In the description of the utility model embodiment, it should be noted that indicating position or position relationship is based on attached drawings Shown in orientation or positional relationship or the utility model product using when the orientation or positional relationship usually put, or Orientation or positional relationship that those skilled in the art usually understand or the utility model product using when usually put Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, and does not indicate or imply the indicated dress It sets or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as to the utility model Limitation.In addition, term " first ", " second ", " third " etc. are only used for distinguishing description, it is not understood to indicate or imply phase To importance.

In the description of the utility model embodiment, it is also necessary to which explanation is unless specifically defined or limited otherwise, art Language " setting ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect It connects；Can be directly connected to, can also be indirectly connected with by intermediary.For the ordinary skill in the art, may be used Understand the concrete meaning of above-mentioned term in the present invention with concrete condition.

Embodiment 1

As shown in Figure 1, the present embodiment provides a kind of drilling guidance tool 200, including hollow housing 10, rotary shaft 20, sky Heart drill collar 30 and driving mechanism 40, rotary shaft 20 are spindle rotationally arranged in hollow housing 10, hollow drill collar 30 and rotary shaft 20 Connection, hollow drill collar 30 can together be rotated with rotary shaft 20, and driving mechanism 40 is set in hollow housing 10, and driving mechanism 40 is used It is bent in making rotary shaft 20.

As shown in Fig. 2, hollow housing 10 is the hollow-core construction of both ends open, section is annular.Hollow housing 10 includes The first cylinder 11, transition body 12 and the second cylinder 13 of coaxial arrangement, the first cylinder 11 and the second cylinder 13 pass through transition body 12 Connection, the internal diameter of the first cylinder 11 are more than the internal diameter of the second cylinder 13.The inner wall of first cylinder 11 is equipped with the first spacing ring 111, the first spacing ring 111 is close to distal end of first cylinder 11 far from the second cylinder 13.The inner wall of second cylinder 13 is equipped with the Two spacing rings 131, the second spacing ring 131 is close to the one end of the second cylinder 13 far from the first cylinder 11.

As shown in figure 3, rotary shaft 20 is hollow shaft, rotary shaft 20 includes the spindle nose 21, first shaft portion 22, cone of coaxial arrangement Shape portion 23 and the second shaft portion 24, first shaft portion 22 are connect with the second shaft portion 24 by tapered portion 23, and first shaft portion 22 is far from taper The one end in portion 23 is connect with spindle nose 21.The outer diameter of first shaft portion 22 is more than the outer diameter of the second shaft portion 24, and the outer wall of tapered portion 23 connects Contacting surface 231, contact surface 231 are circular conical surface, and the outer wall of first shaft portion 22 is transitioned into the second shaft portion 24 by contact surface 231.Such as Fig. 4 Shown, the outer wall of the second shaft portion 24 is equipped with the card slot 241 of multiple even circumferentials distribution, axis of the card slot 241 along the second shaft portion 24 To extension, card slot 241 penetrates through the one end of the second shaft portion 24 far from tapered portion 23.

As shown in figure 5, hollow drill collar 30 is circular configuration, hollow drill collar 30 is including peripheral wall 31 and set on 31 bottom of peripheral wall Bottom wall 32.Wherein, bottom wall 32 is equipped with limit hole 33, and the aperture of limit hole 33 is more than the outer of the second shaft portion 24 of rotary shaft 20 Diameter.The hole wall of limit hole 33 is equipped with the jack 34 of multiple even circumferentials distribution, radial direction cloth of the jack 34 along limit hole 33 It sets, is equipped with push rod 35 and the first elastic component 36 in jack 34, in the present embodiment, the first elastic component 36 is spring, and push rod 35 can be Sliding, the first elastic component 36 act on the first elastic component 36 in jack 34 so that one end of the first elastic component 36 extends to limit In hole 33.The number of push rod 35, the first elastic component 36 and the card slot 241 in rotary shaft 20 corresponds.In addition, hollow drill collar 30 The inner surface of bottom wall 32 be equipped with groove 37, groove 37 is connected to limit hole 33, and groove 37 is with the second spherical surface 38.

As shown in Figure 1, when hollow housing 10, rotary shaft 20 and hollow drill collar 30 connect, hollow drill collar 30 is set to hollow outer The one end of the first cylinder 11 far from the second cylinder 13 of set 10, hollow drill collar 30 are connect with the first cylinder 11 by bearing 50, with Realize the rotation connection of hollow drill collar 30 and hollow housing 10.The one end of first cylinder 11 far from the second cylinder 13 is bolted with first Bearing 50 is pressed on the first spacing ring 111 by gland 60, the first gland 60, and first is equipped between the first gland 60 and hollow drill collar 30 Sealing ring 70.Rotary shaft 20 is set in hollow housing 10, and the spindle nose 21 of rotary shaft 20 extends to outside hollow housing 10, rotary shaft 20 First shaft portion 22 connect by spherical bearing 80 with the second cylinder 13 of hollow housing 10.Second cylinder 13 is far from the first cylinder 11 one end is bolted with the second gland 90, and spherical bearing 80 is pressed on the second spacing ring 131 by the second gland 90, the second gland 90 It is equipped with the second sealing ring 100 with the first shaft portion 22 of rotary shaft 20.The second shaft portion 24 of rotary shaft 20 extends to hollow drill collar In 30 limit hole 33, there are gaps with the hole wall of limit hole 33 for the outer wall of the second shaft portion 24, in the effect of the first elastic component 36 Under, push rod 35 is plugged in the card slot 241 of the second shaft portion 24.All push rods 35, all first elastic components 36 and all card slots 241 The second position limiting structure is constituted, to limit the relative rotation of hollow drill collar 30 and rotary shaft 20, to realize hollow drill collar 30 and rotation The synchronous rotation of shaft 20.

The effect of driving mechanism 40 is that rotary shaft 20 bends.As shown in Figure 1, driving mechanism 40 include rotary body 41, First driving means 42 and the second driving device 43.

As shown in fig. 6, rotary body 41 includes the first rotating ring 411 and the second rotating ring 412 of coaxial arrangement, the second rotation Ring 412 is slidably connected with the first rotating ring 411, and the first limit is equipped between the second rotating ring 412 and the first rotating ring 411 and is tied Structure, i.e. the second rotating ring 412 can only be moved axially with respect to the first rotating ring 411, and the second rotating ring 412 cannot be relative to the first rotation Ring 411 rotates.

Wherein, the first rotating ring 411 is including basic ring 4111 and along the axially extending guide ring 4112 of basic ring 4111, basic ring The internal diameter of 4111 outer diameter and the first cylinder 11 of hollow housing 10 matches, and the internal diameter of guide ring 4112 is more than basic ring 4111 Internal diameter, the outer diameter of guide ring 4112 are less than the outer diameter of basic ring 4111, and the internal diameter of basic ring 4111 is more than the first shaft portion of rotary shaft 20 22 outer diameter.The outer wall of guide ring 4112 is equipped with protrusion 4113, the cylinder of protrusion 4113.Second rotating ring 412 Section is annular, and the outer diameter of the internal diameter and guide ring 4112 of the second rotating ring 412 matches.On the inner wall of second rotating ring 412 Equipped with crowded top 4121, it is platy structure to squeeze top 4121, and squeezing top 4121 has opposite both ends, is located at connecting pin 4122 and contact jaw 4123, connecting pin 4122 and the inner wall of the second rotating ring 412 be connected and fixed, squeeze top 4121 along second rotation Ring 412 radially extends.In addition, being additionally provided with sliding slot 4124 on the inner wall of the second rotating ring 412, sliding slot 4124 is along the second rotating ring 412 it is axial arranged.Second rotating ring 412 is sheathed on the outside of the guide ring 4112 of the first rotating ring 411, the second rotating ring The inner wall formation of 412 inner wall and guide ring 4112 is slidably matched, and the protrusion 4113 on guide ring 4112 extends to the second rotation In sliding slot 4124 in change 412, protrusion 4113 forms the first position limiting structure with sliding slot 4124, to limit the second rotating ring 412 411 axial rotations of opposite first rotating ring.When 412 opposite first rotating ring 411 of the second rotating ring slides axially, protrusion It portion 4113 will the sliding in sliding slot 4124.In the present embodiment, the second driving device 43 is linear motor, the both ends point of linear motor It is not connect with the basic ring 4111 of the first rotating ring 411 and crowded top 4121.When linear motor works, the second rotating ring 412 will Opposite first rotating ring 411 slides axially.

As shown in Figure 1, rotary shaft 20 is located at the center of the first rotating ring 411 and the second rotating ring 412, the first rotation The outer wall of the basic ring 4111 of ring 411 and the inner wall formation of the first cylinder 11 of hollow housing 10 are rotatably assorted.In the present embodiment, the One driving device 42 is rimless motor, and the stator of rimless motor is fixed with hollow housing 10, the rotor of rimless motor and the first rotation The basic ring 4111 of change 411 connects.Eccentric wheel is contacted with the outer wall of the second shaft portion 24 of rotary shaft 20, when the second driving device 43 When working and making the second rotating ring 412 relative to the first rotating ring 411 to close to the movement of the direction of contact surface 231, the second rotating ring The contact jaw 4123 at the crowded top 4121 on 412 will be contacted with contact surface 231 and be moved along contact surface 231, thus to rotary shaft 20 apply radial pressure, and rotary shaft 20 is made to bend.

In addition, as shown in fig. 7, between hollow drill collar 30 and rotary shaft 20 be equipped with sealing structure 110, with realize rotary shaft 20 with Sealing between hollow drill collar 30.

Sealing structure 110 includes slide mass 1101, fixed body 1102 and the second elastic component 1103, slide mass 1101 and fixation Body 1102 is annular, and the end face of axial one end of slide mass 1101 is the first spherical surface 1104, the first spherical surface 1104 and second The radius of spherical surface 38 is consistent.In the present embodiment, the second elastic component 1103 is spring.Slide mass 1101 is sheathed on the of rotary shaft 20 The outside of two axle portions 24, and formed and be slidingly sealed；Fixed body 1102 is screwed onto on the second shaft portion 24, realizes fixed body 1102 and rotation The axial restraint of shaft 20；Second elastic component 1103 is sheathed on the outside of the second shaft portion 24, and the second elastic component 1103 acts on cunning Between kinetoplast 1101 and fixed body 1102, under the action of the second elastic component 1103, the first spherical surface 1104 connects with the second spherical surface 38 It touches and forms sealing.

In actual use, the spindle nose 21 of rotary shaft 20 installs drill bit can make the second drive when drill bit needs deflecting Dynamic device 43 works, and so that crowded top 4121 on the second rotating ring 412 is contacted with contact surface 231, and apply radial direction to rotary shaft 20 Pressure, to make rotary shaft 20 bend, to make drill bit deflecting.When needing the deflecting direction for changing drill bit to make, the can be made One driving device 42 works, and so that rotary body 41 is enclosed and rotates around the axis, and squeezes the position of top 4121 in the circumferential to change, squeezes top The movement of portion 4121 can apply pressure to rotary shaft 20 from multiple directions, so that upper generation is curved from different directions for rotary shaft 20 It is bent.This drilling guidance tool 200 makes rotation by squeezing the movement at top 4121 and being contacted with the contact surface 231 in rotary shaft 20 Axis 20 is bent, and squeezes bending of the top 4121 without limitation on rotary shaft 20, it is ensured that rotary shaft 20 can be good at being bent so that bore The gap tilt effect of head is more preferable.

Since the hole wall of the limit hole 33 on outer wall and the hollow drill collar 30 of the second shaft portion 24 of rotary shaft 20 is there are gap, In bending process, the hole wall of limit hole 33 will not interfere rotary shaft 20 rotary shaft 20.In addition, 20 stress of rotary shaft is curved Qu Hou, under the action of the first elastic component 36, push rod 35 will be always stuck in card slot 241, to realize rotary shaft 20 well With the synchronous rotation of hollow drill collar 30.Certainly, in bending process, slide mass 1101 will rotate rotary shaft 20 in groove 37, Slide mass 1101 will slide axially along rotary shaft 20 while rotation and compress the second elastic component 1103, and sliding part will not be to turning The bending of moving axis interferes.Slide mass 1101 is when groove 37 rotates, first spherical surface under the action of the second elastic component 1103 1104 contact always with the second spherical surface 38, to ensure leakproofness.

Embodiment 2

As shown in figure 8, the present embodiment provides a kind of well system 300, including drilling machine 310, drill string 320, drill bit 330 and on State the drilling guidance tool 200 in embodiment.

Drilling machine 310 is positioned over ground, and one end of drill string 320 is connect with drilling machine 310, and drill string 320 extends to below ground In drilling, the other end of drill string 320 is connect with the hollow drill collar 30 in drilling guidance tool 200, drill bit 330 and rotary shaft 20 Spindle nose 21 connects.When drilling machine 310 works, drill string 320 will drive hollow drill collar 30 and rotary shaft 20 to rotate, to make drill bit 330 rotations, complete boring action.

The preferred embodiment that these are only the utility model, is not intended to limit the utility model, for this field Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model, Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of drilling guidance tool, which is characterized in that including：

Hollow housing；

Rotary shaft, the hollow housing are sheathed on the outside of the rotary shaft, and the rotary shaft passes through ball with the hollow housing Spherical bearing connects, and it is circular conical surface that the rotary shaft, which has contact surface, the contact surface,；

Hollow drill collar, the hollow drill collar are rotatably set in the hollow housing, and the hollow drill collar is supported in described Rotary shaft, the hollow drill collar can be rotated synchronously with the rotary shaft；

Driving mechanism, the driving mechanism include rotary body, first driving means and the second driving device, and the rotary body includes First rotating ring and the second rotating ring, second rotating ring are slidably connected with first rotating ring, second rotating ring It is provided with the first position limiting structure between first rotating ring, is turned with limiting relatively described first rotating ring of the second rotating ring Dynamic, first rotating ring is rotatablely connected with the hollow housing, and the first driving means are for driving first rotation Ring is rotated relative to the hollow housing, and second driving device is for driving second rotating ring relative to first rotation Ring slides axially；

Second rotating ring, which is equipped with, squeezes top, when second driving device drives opposite first rotation of second rotating ring When change slides axially, the crowded top can be moved along the contact surface, so that the rotation bending shaft.

2. drilling guidance tool according to claim 1, which is characterized in that first rotating ring includes basic ring and along institute The axially extending guide ring of basic ring is stated, the outer wall of the basic ring is contacted and is formed with the hollow housing and is rotatably assorted, and described Two rotating rings are sheathed on the outside of the guide ring, and the inner wall of second rotating ring contacts with the guide ring and forms sliding Cooperation.

3. drilling guidance tool according to claim 2, which is characterized in that first position limiting structure includes set on described Protrusion on the outer wall of guide ring and the sliding slot on the inner wall of second rotating ring, the protrusion extend to described In sliding slot；

When relatively described first rotating ring of second rotating ring moves axially, the protrusion can be slided in the sliding slot It is dynamic.

4. drilling guidance tool according to claim 1, which is characterized in that the crowded top has connecting pin and contact End, the connecting pin are connect with second rotating ring, and the contact jaw with the contact surface for contacting, the crowded top edge Second rotating ring radially extends.

5. drilling guidance tool according to claim 4, which is characterized in that the both ends of second driving device respectively with The crowded top is connected with the first rotating ring.

6. drilling guidance tool according to claim 1, which is characterized in that the hollow drill collar is equipped with limit hole, institute It states rotary shaft to be inserted in the limit hole, there are gap, the skies for the outer wall of the hole wall of the limit hole and the rotary shaft Heart drill collar is equipped with the second position limiting structure with the rotation between centers, is rotated relative to the hollow drill collar with limiting the rotary shaft.

7. drilling guidance tool according to claim 6, which is characterized in that second position limiting structure includes multiple pushes away Bar, multiple first elastic components and a plurality of circumferentially spaced card slot in the rotary shaft, the push rod, first elasticity Part is corresponded with the card slot；

The card slot is axial arranged along the rotary shaft, and the push rod is slidably connected with the hollow drill collar, the push rod energy Enough radially sliding along the hollow drill collar, first elastic component act on the push rod so that the push rod be stuck in it is described In card slot.

8. drilling guidance tool according to claim 7, which is characterized in that the hollow drill collar is set with the rotation between centers There is sealing structure.

9. drilling guidance tool according to claim 8, which is characterized in that the sealing structure includes slide mass, fixation Body and the second elastic component；

The slide mass is slidably arranged in the rotary shaft, and the slide mass is slidingly sealed with the rotary shaft, described Slide mass has the first spherical surface；

The fixed body is fixed in the rotary shaft；

The hollow drill collar is equipped with groove, and there is the groove the second spherical surface, second elastic component to act on the sliding Between body and the fixed body, so that first spherical surface is sealed with second sphere-contact.

10. a kind of well system, which is characterized in that bored including drilling machine, drill string, drill bit and claim 1-9 any one of them One end of well steering tool, drill string is connect with drilling machine, and the other end of drill string is connect with the hollow drill collar, the drill bit and rotation Axis connection.