阅读说明：本技术 一种旋转定径规 (A kind of rotation sizing rule ) 是由 赵涛 齐月魁 黄满良 于 2018-05-17 设计创作，主要内容包括：本发明公开了一种旋转定径规,属于油气田开发井下作业工具领域。所述旋转定径规在旋转定径规配置为刮削时,第一凸起卡扣在第一周向槽内,第二凸起卡扣在第二周向槽内,凸圈卡扣在第四凹槽内,使得旋转定径规顺利通过套管缩颈段；在旋转定径规配置为刮削时,通过向旋转定径规中连续注入高压液体,高压液体在通过推筒的喷嘴时由于第二部为渐缩的圆台孔,因而产生压降,在高压液体的冲击力下推筒被移动,使得凸圈离开第四凹槽后抵靠在第二凸起上,推筒的内壁抵靠在第一凸起上,刀柄上移,第一弹性缓冲器件被压缩,部分刃部从本体中弹出,与套管内壁紧密接触,当旋转或者上下运动旋转定径规时,实现对套管缩颈段下部的目的井段进行刮削作业。(The invention discloses a kind of rotation sizing rule, belong to oil-gas field development underground operation tool field.When rotation sizing rule are configured to scraping, the first protrusion is buckled in the first circumferential slot the rotation sizing rule, and the second protrusion is buckled in the second circumferential slot, and flange collar is buckled in the 4th groove, so that rotation sizing rule pass through casing necking segment；When rotation sizing rule are configured to scraping, by being continuously injected into highly pressurised liquid into rotation sizing rule, highly pressurised liquid is when passing through the nozzle of pushing cylinder since second is tapered round platform hole, thus generate pressure drop, pushing cylinder is moved under the impact force of highly pressurised liquid, so that flange collar is resisted against in the second protrusion after leaving the 4th groove, the inner wall of pushing cylinder is resisted against in the first protrusion, knife handle moves up, first elastic buffer device is compressed, part blade is popped up from ontology, it is in close contact with internal surface of sleeve pipe, when rotation or the rotation sizing that moves up and down are advised, it realizes and scraping is carried out to the purpose well section of casing necking down pars infrasegmentalis.)

1. a kind of rotation sizing rule, which is characterized in that it includes: ontology (1), pushing cylinder (2), scraper (3), that the rotation sizing, which is advised, One elastic buffer device (4), block (5), the second elastic buffer device (7) and sealing drum (8), wherein

The ontology (1) and the pushing cylinder (2) are hollow cylinder, and the pushing cylinder (2) is movably inserted into the ontology (1) Barrel chamber in；

The pushing cylinder (2) is provided with nozzle (6), and the nozzle (6) includes connected first (601) and second (602), institute The inner hole for stating first (601) is the round platform hole tapered towards second (602), and the inner hole of second (602) is Cylindrical hole；

The second elastic buffer device (7) is arranged between the pushing cylinder (2) and the ontology (1), and one end is resisted against On the shoulder of ontology (1) inner wall, the other end is resisted against on the shoulder of the pushing cylinder (2) outer wall；

The sealing drum (8) is inserted into the barrel chamber of the pushing cylinder (2), and is connected with the pushing cylinder (2), and the pushing cylinder (2) opens up Have through-hole (204), the sealing drum (8) is for blocking the through-hole (204)；

The outer wall of the ontology (1) offers fixing groove, and the fixing groove includes the first groove and through slot of connection, the scraper It (3) include knife handle (301) and blade (302), knife handle (301) described in block (5) gland, and it is fixed on described first together In groove, the blade (302) is fixed in the through slot, and is in contact with the pushing cylinder (2)；The knife handle (301) opens up There is the second groove, the block (5) offers third groove, and the first elastic buffer device (4) setting is recessed described second In slot and the third groove；

The blade (302) is provided with first raised (3021) and second raised (3022), described first raised (3021) and institute It states and forms the 4th groove (3023) between second raised (3022)；The outer wall of the pushing cylinder (2) offers the first circumferential slot (201) With the second circumferential slot (202), flange collar (203) are formed between first circumferential slot (201) and second circumferential slot (202)；

When the rotation sizing rule are not configured as scraping, described first raised (3021) are buckled in first circumferential slot (201) in, described second raised (3022) are buckled in second circumferential slot (202), and the flange collar (203) is buckled in described In 4th groove (3023)；When the rotation sizing rule are configured as scraping, the flange collar (203) is resisted against second protrusion (3022) on.

2. spin orientation according to claim 1 rule, which is characterized in that described first raised (3021) are far from described the The side of two raised (3022) and second raised (3022) are being set as oblique close to the side of described first raised (3021) Face, side and second circumferential slot of the cell wall of first circumferential slot (201) in separate second circumferential slot (202) (202) cell wall is set as the conical surface in the side close to first circumferential slot (201), and the inclined-plane is resisted against the conical surface On.

3. spin orientation rule according to claim 1, which is characterized in that the quantity of the fixing groove is 5~6, and The even ring week for being laid in the ontology (1).

4. spin orientation rule according to claim 1, which is characterized in that the rotation sizing rule further include: sphere (9), One end of the sealing drum (8) is provided with ball seat, and the sphere (9) sets on the ball seat.

5. spin orientation rule according to claim 1, which is characterized in that the rotation sizing rule further include: connector (10), One end of the connector (10) is connected with the ontology (1), and the other end of the connector (10) is connected with tubing string.

6. spin orientation rule according to claim 5, which is characterized in that the rotation sizing rule further include: orientation spool (11), the orientation spool (11) is arranged between the ontology (1) and the connector (10), is connected with the ontology (1), and It is in contact when rotation sizing rule are not configured as scraping with one end of the pushing cylinder (2).

Technical field

The present invention relates to oil-gas field development underground operation tool field, in particular to a kind of rotation sizing rule.

Background technique

At present oil field carry out large repairs to oil gas water well, light maintenance or when measure operation, in order to ensure purpose well section of constructing Internal surface of sleeve pipe latus rectum reaches construction technical requirement, is convenient for the various downhole tools of tripping in, needs first hard to what is retained on internal surface of sleeve pipe Wax, salt crust and borehole burr etc. are purged, and carry out repeated multiple times scrape to entire pit shaft especially purpose well section and adjacent well section It cuts.

Summary of the invention

In consideration of it, the present invention provides a kind of rotation sizing rule, set cannot be passed through to solve the spring scraper of the prior art The problem of pipe necking segment carries out scraping to purpose well section, and scraper is unable to normal reset because adhering to clast in blade groove.

Specifically, including technical solution below:

A kind of rotation sizing rule, the rotation sizing rule include: ontology, pushing cylinder, scraper, the first elastic buffer device, gear Block, the second elastic buffer device and sealing drum, wherein

The ontology and the pushing cylinder are hollow cylinder, and the pushing cylinder is movably inserted into the barrel chamber of the ontology In；

The pushing cylinder is provided with nozzle, and the nozzle includes connected first and second, first inner hole For towards second tapered round platform hole, second inner hole is cylindrical hole；

The second elastic buffer device is arranged between the pushing cylinder and the ontology, and one end is resisted against described On the shoulder of internal wall, the other end is resisted against on the shoulder of the pushing cylinder outer wall；

The sealing drum is inserted into the barrel chamber of the pushing cylinder, and is connected with the pushing cylinder, and the pushing cylinder offers through-hole, institute Sealing drum is stated for blocking the through-hole；

The outer wall of the ontology offers fixing groove, and the fixing groove includes the first groove and through slot of connection, described to scrape Knife includes knife handle and blade, knife handle described in the block gland, and is fixed in first groove together, and the blade is fixed It is in contact in the through slot, and with the pushing cylinder；The knife handle offers the second groove, and it is recessed that the block offers third Slot, the second elastic buffer device are arranged in second groove and the third groove；

The blade is provided with the first protrusion and the second protrusion, and the is formed between first protrusion and second protrusion Four grooves；The outer wall of the pushing cylinder offers the first circumferential slot and the second circumferential slot, first circumferential slot and the second week To forming flange collar between slot；

When the rotation sizing rule are not configured as scraping, first protrusion is buckled in first circumferential slot, institute It states the second protrusion to be buckled in second circumferential slot, the flange collar is buckled in the 4th groove；The rotation sizing When rule are configured as scraping, the flange collar is resisted against in second protrusion.

Selectively, first protrusion is in the side of separate second protrusion and second protrusion close to described The side of first protrusion is set as inclined-plane, and the cell wall of first circumferential slot is in side far from second circumferential slot and described The cell wall of second circumferential slot is set as the conical surface in the side close to first circumferential slot, and the inclined-plane is resisted against the conical surface On.

Selectively, the quantity of the fixing groove is 5~6, and the uniformly distributed ring week in the ontology.

Selectively, the rotation sizing rule further include: sphere, one end of the sealing drum are provided with ball seat, the ball Body is set on the ball seat.

Selectively, the rotation sizing rule further include: connector, one end of the connector is connected with the ontology, described The other end of connector is connected with tubing string.

Selectively, the rotation sizing rule further include: orientation spool, the orientation spool are arranged in the ontology and institute It states between connector, is connected with the ontology, and one end when the rotation sizing rule are not configured as scraping with the pushing cylinder It is in contact.

Technical solution provided in an embodiment of the present invention the utility model has the advantages that

1, when rotation sizing rule are not configured as scraping, the first protrusion is buckled in the first circumferential slot, the second protrusion buckle In the second circumferential slot, flange collar is buckled in the 4th groove, so that rotation sizing rule can pass through casing necking segment；It is revolving Turn sizing rule when being configured to scraping, by being continuously injected into highly pressurised liquid into rotation sizing rule, highly pressurised liquid is passing through pushing cylinder When nozzle, due to second be tapered round platform hole, thus generate pressure drop, under the impact force of highly pressurised liquid, pushing cylinder is moved, So that flange collar is resisted against in the second protrusion after leaving the 4th groove, the inner wall of pushing cylinder is resisted against in the first protrusion, and knife handle moves up, the One elastic buffer device is compressed, and part blade is popped up from ontology, is in close contact with internal surface of sleeve pipe, when rotation or upper and lower fortune When dynamic rotation sizing rule, it may be implemented to carry out scraping to the purpose well section of casing necking down pars infrasegmentalis；

2, due to the movement of pushing cylinder, made by the second elastic buffer device of setting when rotation sizing rule are configured to scraping The second elastic buffer device is obtained to be compressed；After the completion of scraping, by shutting down the hydraulic pump of well head, so that being generated by highly pressurised liquid Hydraulic disappearance, the second elastic buffer device resets, so that pushing cylinder resets, rotation sizing rule are restored to and are not configured as scraping The state cut can will rotate sizing rule and be moved to the purpose well section that other in pit shaft need scraping, and turn on pump carries out scraping again Operation；

3, when fixing groove is blocked, since pushing cylinder offers through-hole, highly pressurised liquid can enter pushing cylinder by through-hole, solution Blocking except deposit to fixing groove solves the problems, such as that scraper is unable to normal reset because adhering to clast in fixing groove；Work as rotation Sizing is advised in scraping state, by the way that the sealing drum being connected with pushing cylinder is arranged, is realized the closure to through-hole, is prevented highly pressurised liquid logical Through-hole outflow rotation sizing rule are crossed, the pop-up of scraper is influenced.

Detailed description of the invention

To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other Attached drawing.

Fig. 1 is structural schematic diagram when a kind of rotation sizing rule provided in an embodiment of the present invention are not configured as scraping；

Fig. 2 is that a kind of rotation sizing provided in an embodiment of the present invention advises blade and the partial structurtes of pushing cylinder contact position are illustrated Figure；

Fig. 3 is structural schematic diagram when a kind of rotation sizing rule provided in an embodiment of the present invention are configured as scraping；

Fig. 4 is that a kind of structure of the rotation sizing rule provided in an embodiment of the present invention when removing the deposit in fixing groove is shown It is intended to.

Appended drawing reference in figure respectively indicates are as follows:

1, ontology；

2, pushing cylinder；201, the first circumferential slot；202, the second circumferential slot；203, flange collar；204, through-hole；

3, scraper；301, knife handle；302, blade；3021, the first protrusion；3022, the second protrusion；3023, the 4th groove；

4, the first elastic buffer device；

5, block；

6, nozzle；601, first；602, second；

7, the second elastic buffer device；

8, sealing drum；

9, sphere；

10, connector；

11, orientation spool；

12, the first fixing screws；

13, the second fixing screws；

14, anti-rotation screw.

Specific embodiment

To keep technical solution of the present invention and advantage clearer, below in conjunction with attached drawing to embodiment of the present invention make into One step it is described in detail.

The embodiment of the invention provides a kind of rotation sizing rule, and structural schematic diagram is as shown in Fig. 1 or Fig. 3, comprising: ontology 1, pushing cylinder 2, scraper 3, the first elastic buffer device 4, block 5, the second elastic buffer device 7 and sealing drum 8.

Wherein, ontology 1 and pushing cylinder 2 are hollow cylinder, and pushing cylinder 2 is movably inserted into the barrel chamber of ontology 1；

Pushing cylinder 2 is provided with nozzle 6, and nozzle 6 includes first 601 and second 602 to be connected, first 601 inner hole For towards second 602 tapered round platform hole, second 602 inner hole is cylindrical hole；

Second elastic buffer device 7 is arranged between pushing cylinder 2 and ontology 1, and one end is resisted against the platform of 1 inner wall of ontology On shoulder, the other end is resisted against on the shoulder of 2 outer wall of pushing cylinder, as shown in Figure 1；

Sealing drum 8 is inserted into the barrel chamber of pushing cylinder 2, and is connected with pushing cylinder 2, and pushing cylinder 2 offers through-hole 204, and sealing drum 8 is used for Block through-hole 204；

The outer wall of ontology 1 offers fixing groove, and fixing groove includes the first groove and through slot of connection, and scraper 3 includes knife handle 301 and blade 302,5 gland knife handle 301 of block, and be fixed in the first groove together, blade 302 is fixed in through slot, and with Pushing cylinder 2 is in contact；Knife handle 301 offers the second groove, and block 5 offers third groove, the setting of the first elastic buffer device 4 In the second groove and third groove；

Blade 302 is provided with the first protrusion 3021 and second protrusion 3022, the first protrusion 3021 and the second protrusion 3022 it Between formed the 4th groove 3023；The outer wall of pushing cylinder 2 offers the first circumferential slot 201 and the second circumferential slot 202, the first circumferential slot 201 and second form flange collar 203 between circumferential slot 202；

When rotation sizing rule are not configured as scraping, the first protrusion 3021 is buckled in the first circumferential slot 201, the second protrusion 3022 are buckled in the second circumferential slot 202, and flange collar 203 is buckled in the 4th groove 3023；Rotation sizing rule are configured as scraping When, flange collar 203 is resisted against in the second protrusion 3022.

It should be noted that block 5 can be connected by the first fixing screws 12 with ontology 1, such as Fig. 1 or Fig. 3 or Fig. 4 institute Show, and in order to ensure fixed fastness, the quantity of the second fixing screws 12 can be multiple.

The working principle of the rotation sizing rule of the embodiment of the present invention are as follows:

(1) when rotation sizing rule are not configured as scraping, the first protrusion 3021 is buckled in the first circumferential slot 201, and second Protrusion 3022 is buckled in the second circumferential slot 202, and flange collar 203 is buckled in the 4th groove 3023, so that rotation sizing rule can be with Pass through casing necking segment；When rotation sizing rule are configured to scraping, by being continuously injected into high pressure liquid into rotation sizing rule Body, highly pressurised liquid since second 602 be tapered round platform hole, thus generate pressure drop, in height when through the nozzle 6 of pushing cylinder 2 Under the impact force of press liquid, pushing cylinder 2 is moved, so that flange collar 203 is resisted against the second protrusion 3022 after leaving the 4th groove 3023 On, the inner wall of pushing cylinder 2 is resisted against in the first protrusion 3021, and knife handle 301 moves up, and the first elastic buffer device 4 is compressed, part sword Portion 302 is popped up from ontology 1, is in close contact with internal surface of sleeve pipe, when rotation or up and down motion rotation sizing rule, may be implemented Scraping is carried out to the purpose well section of casing necking down pars infrasegmentalis；

(2) by the second elastic buffer device 7 of setting, when rotation sizing rule are configured to scraping, due to the shifting of pushing cylinder 2 It is dynamic, so that the second elastic buffer device 7 is compressed；After the completion of scraping, by shutting down the hydraulic pump of well head, so that by high pressure liquid Body generate hydraulic disappearance, the second elastic buffer device 7 reset so that pushing cylinder 2 reset, rotation sizing rule be restored to not by It is configured to the state of scraping, sizing rule can will be rotated and be moved to the purpose well section that other in pit shaft need scraping, again turn on pump Carry out scraping；

(3) when fixing groove is blocked, since pushing cylinder 2 offers through-hole 204, highly pressurised liquid can by through-hole 204 into Enter pushing cylinder 2, release blocking of the deposit to fixing groove, solves scraper 3 because adhering to clast in fixing groove and be unable to normal reset Problem；When rotation sizing rule are in scraping state, by the way that the sealing drum 8 being connected with pushing cylinder 2, envelope of the realization to through-hole 204 is arranged It is stifled, it prevents highly pressurised liquid by the outflow rotation sizing rule of through-hole 204, influences the pop-up of scraper 3.

Explanation is further explained to each component part of the rotation sizing rule of the embodiment of the present invention below:

In order to ensure stress balance, for scraper 3, the knife handle 301 of scraper 3 can be symmetricly set on blade 302 Two sides allow blade 302 to keep balancing as shown in Fig. 1 or Fig. 3 or Fig. 4.

Correspondingly, the first groove is symmetricly set on the two sides of through slot, and the quantity of block 5 is identical as the quantity of knife handle 301.

In order to realize that flange collar 203 is resisted against in the second protrusion 3022, the first protrusion 3021 is in separate second protrusion 3022 Side and the second protrusion 3022 are set as inclined-plane in the side close to the first protrusion 3021, and the cell wall of the first circumferential slot 201 is remote The cell wall of side and the second circumferential slot 202 from the second circumferential slot 202 is set as boring in the side close to the first circumferential slot 201 Face, that is, flange collar 203 are set as the conical surface close to the side of the second circumferential slot 202, and inclined-plane is resisted against on the conical surface, as shown in Figure 2.

So set, making pushing cylinder 2 main body and flange collar 203 of first circumferential slot 201 far from 202 side of the second circumferential slot Side close to the second circumferential slot 202 can be slided under the impact force action of highly pressurised liquid along inclined-plane, the first circumferential slot 201 2 main body of pushing cylinder far from 202 side of the second circumferential slot can be resisted against in the first protrusion 3021, and it is convex that flange collar 203 is resisted against second It rises on 3022, realizes part blade 302 from the pop-up in ontology 1.

In order to realize the movement of pushing cylinder 2, nozzle 6 plays the role of critical.

When in use, model (the inner hole ruler of the nozzle 6 of different model of nozzle 6 can be not only replaced according to the actual situation Very little difference), and so set, passing through for highly pressurised liquid can be conducive to, play the role of water conservancy diversion.

In embodiments of the present invention, nozzle 6 may be used also other than it may include connected first 601 and second 602 Think the barrel dliameter tapered configuration being formed directly into pushing cylinder 2, the production of pushing cylinder 2 can be carried out according to actual working condition requirement.

In order to which the scraping to set tube wall is better achieved, in structure setting, the quantity of fixing groove is 5~6, and The uniformly distributed ring week in ontology 1, as shown in Fig. 1 or Fig. 3 or Fig. 4.It will be appreciated by persons skilled in the art that scraper 3 Quantity is identical as the quantity of fixing groove, that is to say, that the uniformly distributed ring week in ontology 1 of scraper 3.

The insufficient pop-up of blade 302 in order to prevent, and scraping rear sleeve latus rectum is made to be not achieved job requirements, scraper 3 and pushes away The material that cylinder 2 uses is rigidity material.Therefore, the two is when contacting with each other, and what is generated each other is rigidity contact, can be with It effectively prevent blade 302 rebound phenomenon occur during scraping, to guarantee that the run through casing size after scraping reaches design requirement.

For the first elastic buffer device 4 and the second elastic buffer device 7, the first elastic buffer device 4 and second Elastic buffer device 7 all can be spring or Elastic plastic-rubber pad, be not especially limited in embodiments of the present invention.

For example, the first elastic buffer device 4 and the second elastic buffer device 7 can be spring, such as Fig. 1 or Fig. 3 or Shown in Fig. 4.

For sealing drum 8, sealing drum 8 plays the role of blocking through-hole 204, in order to realize the fixation of sealing drum 8, Can be connected by the second fixing screws 13 between sealing drum 8 and pushing cylinder 2, as shown in Fig. 1 or Fig. 3, with ensure sealing drum 2 with Position between pushing cylinder 2 is relatively fixed.

For through-hole 204, the quantity of through-hole 204 can be 5~6, the uniformly distributed circumferential direction in pushing cylinder 2, can be with It is connected to the second circumferential slot 202, can not also be connected to, be not specifically limited herein with the second circumferential slot 202；The axis of through-hole 204 Angle between line and the axis of pushing cylinder 2 can be 40~60 °, pour convenient for the high speed of highly pressurised liquid.

Further, rotation sizing rule further include: one end of sphere 9, sealing drum 8 is provided with ball seat, as shown in figure 4, ball Body 9 is set on ball seat.

During scraping, if the deposit of scraping is drilled into fixing groove, it be easy to cause scraper 3 is stuck cannot pop up, Directly influence the using effect and reset function of scraper 3.At this point, by investment sphere 9, so that sphere 9 is set on ball seat, So that highly pressurised liquid no longer can be by sealing drum 8, by building the pressure for highly pressurised liquid, the second fixing screws 13 are cut, sealing drum 8 Relative displacement is generated between pushing cylinder 2, highly pressurised liquid is punched into fixing groove by through-hole 204, in high speed impact Under effect, the deposit in fixing groove can be rushed out, to release the stuck state of scraper 3.

For the overall structure of rotation sizing rule, rotation sizing rule can also include: connector 10, one end of connector 10 It is connected with ontology 1, the other end of connector 10 is connected with tubing string.

By the way that connector 10 is arranged, it is connected convenient for rotation sizing rule with tubing string.

Further, rotation sizing rule can also include: orientation spool 11, and orientation spool 11 is arranged in ontology 1 and connector Between 10, it is connected with ontology 1, and is in contact when rotating sizing rule and being not configured as scraping with one end of pushing cylinder 2, as shown in Figure 1, Convenient for connection ontology 1 and connector 10.

Specifically, one end of orientation spool 11 is provided with the first internal thread segment, and the other end is provided with the first external thread section, connects First 10 one end is provided with the second external thread section, and one end of ontology 1 is provided with the second internal thread segment, the first internal thread segment and second External thread section cooperation, realizes the threaded connection between orientation spool 11 and connector 10；First external thread section and the second internal thread segment The threaded connection between orientation spool 11 and ontology 1 is realized in cooperation.

Meanwhile being rotated between orientation spool 11 and ontology 1 in order to prevent, influence the scraping of rotation sizing rule, In The circumferential direction of orientation spool 11 offers 2~3 groups of threaded holes, corresponding, and the circumferential direction of ontology 1 is also evenly distributed with 2~3 groups of threaded holes, anti-rotation Screw 14 is suitable for screwing in the threaded hole of ontology 1 and orientation spool 11, further fixes orientation spool 11 and ontology 1.

In the actual use process, after connector 10 being connect with tubing string, by transferring tubing string, realizing will rotation sizing rule It is lowered into well, the purpose well section of scraping is needed by resting on after casing necking segment, rotation sizing rule at this time are in small straight Diameter state；

Hydraulic pump is opened, and reaches design discharge capacity, highly pressurised liquid generates pressure drop after flowing through nozzle 6, in rushing for highly pressurised liquid It is mobile to hit under power pushing cylinder 2, the second elastic buffer device 7 is compressed, and flange collar 203 leaves that be resisted against second after the 4th groove 3023 convex It rising on 3022, the inner wall of pushing cylinder 2 is resisted against in the first protrusion 3021, and knife handle 301 moves up, and the first elastic buffer device 4 is compressed, Part blade 302 is popped up from ontology 1, realize with the close contact of internal surface of sleeve pipe, by rotation to rotation sizing rule and on Lower reciprocating motion, blade 302 can cut off the obturator on internal surface of sleeve pipe, and the run through casing size after making scraping reaches lower part construction It is required that；

Hydraulic pump is shut down after the completion of scraping, the hydraulic thrust on pushing cylinder 2 disappears, in the elastic force of the second elastic buffer device 7 The mobile reset of lower push-rod 2 is acted on, minor diameter state is restored.

The above is merely for convenience of it will be understood by those skilled in the art that technical solution of the present invention, not to limit The present invention.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this Within the protection scope of invention.