CN204804773U - Scrape wall ware - Google Patents
Scrape wall ware Download PDFInfo
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- CN204804773U CN204804773U CN201520367709.5U CN201520367709U CN204804773U CN 204804773 U CN204804773 U CN 204804773U CN 201520367709 U CN201520367709 U CN 201520367709U CN 204804773 U CN204804773 U CN 204804773U
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- scraper
- wall
- storage sleeve
- wall scraper
- scraper body
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Abstract
The utility model provides a scrape wall ware. The utility model discloses well -flushing scrape wall ware, include: scrape wall ware body, elasticity scraper mechanism, accomodate the sleeve, wherein, the scrape wall ware body is hollow structure, be equipped with on the outer wall of scrape wall ware body elasticity scraper mechanism, elasticity scraper mechanism includes the scraper, the scraper is used for radial expansion under the effect of elasticity, still overlap on the outer wall of scrape wall ware body and be equipped with accomodate the sleeve, accomodate the sleeve and be used for accomplishing edge endwise slip under the effect that the back is being greater than the axial force of predetermineeing the threshold value scraping the wall, it is right the radial force is applyed to the scraper, makes the scraper radial shrinkage is accomodate the scraper. The utility model discloses can realize the scraper and retrieve, can prevent that the scraper from meetting scraping back accident at the barefoot interval and opening to can accomplish at one time in -process that runs the drilling tool into the well scraping wall and well -flushing operation, reduce by a round trip, improve the efficiency of scraping the operation of wall well -flushing effectively, reduce the operating cost.
Description
Technical field
The utility model relates to Oil/gas Well equipment technical field, particularly relates to a kind of wall scraper.
Background technology
In oilfield downhole operation construction, the fouls such as the iron oxide that internal surface of sleeve pipe produces after easy residual water clod, cement sheath, hard wax, various saline crystallization or deposit, perforation burrs and sleeve pipe corrosion, therefore a kind of instrument to the effective scraping of internal surface of sleeve pipe is needed to carry out scraping cleaning, so that unblocked underground enters various downhole tool.
In prior art, internal surface of sleeve pipe being carried out to the wall scraper of scraping, is radially expanded under the effect of elastic force by the scraper on wall scraper and realize scraping.After described internal surface of sleeve pipe scraping, need to enter well-flushing position under wall scraper, and well-flushing medium is injected through pit shaft by pumping-in equipment, the foul after scraping in pit shaft is carried into ground.But because the inwall of barefoot interval is rough, enter in the process of well-flushing position under wall scraper, scraper easily opens after running into the inwall scraping of barefoot interval, the generation of lock of tool drilling can be caused, therefore barefoot interval can not be entered by under wall scraper, need during clean-out service to pull out of hole scraping after wall operation completes, enter down a Flushing tubular column after laying down wall scraper again and just can carry out, the efficiency of scraping wall clean-out service is lower again.
Utility model content
The utility model provides a kind of wall scraper, to overcome in prior art the lower problem of the efficiency of scraping wall clean-out service.
The utility model provides a kind of wall scraper, comprising:
Wall scraper body, elastic scraper mechanism, storage sleeve;
Wherein, described wall scraper body is hollow structure, and the outer wall of described wall scraper body is provided with described elastic scraper mechanism; Described elastic scraper mechanism comprises scraper, and described scraper is used for radial dilatation under the effect of elastic force;
The outer wall of described wall scraper body is also arranged with described storage sleeve, described storage sleeve is used for sliding axially under the effect of axial force being greater than predetermined threshold value scraping after wall completes, radial load is applied to described scraper, makes described scraper radial contraction, receive described scraper.
Alternatively, the outer wall of described wall scraper body is also provided with stopping mechanism, for making the unidirectional slip vertically of described storage sleeve with the effect of described storage sleeve.
Alternatively, described stopping mechanism, comprising:
Fixed cover is located at the retaining ring on the outer wall of described wall scraper body, and the excircle of described retaining ring is provided with retaining ratchet, and the inwall of described storage sleeve is provided with the ratchet matched with described retaining ratchet.
Alternatively, the quantity of described storage sleeve is one or two;
When the quantity of described storage sleeve is one, the outer wall of described wall scraper body is provided with stopping means, for playing position-limiting action to described storage sleeve;
When the quantity of described storage sleeve is two, two described storage sleeves relative sliding under the effect of axial force, receives described scraper.
Alternatively, the outer wall of described wall scraper body is also provided with the fluid cylinder mechanism with described storage sleeve connection, pressure chamber is formed between described fluid cylinder mechanism and described wall scraper body, described wall scraper body radially offers the pressure transmission hole being communicated with described pressure chamber, described pressure transmission hole is used for intrinsic for described wall scraper highly pressurised liquid to enter described pressure chamber by described pressure transmission hole, form pressure reduction, the axial force produced by described pressure reduction promotes described fluid cylinder mechanism and drives described storage sleeve to slide axially.
Alternatively, described fluid cylinder mechanism comprises joint ring and liquid cylinder, described joint ring and described wall scraper body are sealedly and fixedly connected, described liquid cylinder and described storage sleeve connection, described liquid cylinder and respectively slipper seal, described joint ring and mineralization pressure chamber between described liquid cylinder and described wall scraper body between described joint ring and described wall scraper body.
Alternatively, described liquid cylinder and described storage sleeve are structure as a whole or Split type structure;
The inwall of described liquid cylinder is provided with for the ring packing platform with the slipper seal of described wall scraper body, the inwall of the side of described ring packing platform and described joint ring slipper seal, be provided with space between the opposite side of described ring packing platform and described stopping mechanism, described space can slide axially under the promotion of described liquid cylinder for making described storage sleeve.
Alternatively, described joint ring and described wall scraper body are Split type structure or integrative-structure;
When described joint ring and described wall scraper body are Split type structure, described joint ring and described wall scraper body are fixed by screw thread and alignment pin;
When described joint ring and described wall scraper body are structure as a whole, the outer wall of described joint ring is provided with annular protrusion, for making described joint ring and described liquid cylinder slipper seal.
Alternatively, described storage sleeve is fixed by shear pin and described wall scraper body.
Alternatively, described storage sleeve is formed with interior inclined-plane near the end of described scraper side, the end of described scraper has the outer inclined-plane with slopes which match in storage sleeve, when described storage sleeve slides to described scraper vertically, the interior inclined-plane of described storage sleeve and the outer inclined-plane of described scraper act on described spatulate radially power mutually, described scraper radial contraction under the effect of described radial load.
Alternatively, the outer wall of described wall scraper body is provided with blade groove, and described scraper is located in described blade groove, is also provided with spring in described blade groove, and described spring is connected with described scraper, for the radial load of applying radial dilatation to described scraper.
The utility model wall scraper, wall scraper comprises: wall scraper body, elastic scraper mechanism, storage sleeve; Wherein, described wall scraper body is hollow structure, and the outer wall of described wall scraper body is provided with described elastic scraper mechanism; Described elastic scraper mechanism comprises scraper, and described scraper is used for radial dilatation under the effect of elastic force; The outer wall of described wall scraper body is also arranged with described storage sleeve, described storage sleeve is used for sliding axially under the effect of axial force being greater than predetermined threshold value scraping after wall completes, radial load is applied to described scraper, make described scraper radial contraction, receive described scraper, wall scraper realizes scraper by storage sleeve sheathed on the outer wall of wall scraper body and reclaims, and namely scraper is locked in retracted state scraping after wall operation completes.Can prevent scraper from surprisingly opening after barefoot interval runs into scraping, existing wall scraper can not enter barefoot interval problem owing to easily meeting card can be overcome, thus can complete scraping wall and clean-out service in the process to make a trip for a time, decrease one trip operation, effectively improve the efficiency of scraping wall clean-out service, reduce operating cost.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the utility model wall scraper one embodiment;
Fig. 2 is the structural representation of another embodiment of the utility model wall scraper;
Fig. 3 is the flow chart that wall method one embodiment scraped by the utility model well-flushing.
Description of reference numerals:
1: wall scraper body;
2: joint ring;
3: liquid cylinder;
4: storage sleeve;
5: shear pin;
6: scraper;
7: spring;
8: stopping mechanism;
9: pressure chamber;
10: pressure transmission hole;
11: elastic scraper mechanism.
Detailed description of the invention
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of the utility model wall scraper one embodiment, and as shown in Figure 1, the wall scraper of the present embodiment, comprising:
Wall scraper body 1, elastic scraper mechanism 11, storage sleeve 4;
Wherein, described wall scraper body 1 is hollow structure, and the outer wall of described wall scraper body 1 is provided with described elastic scraper mechanism 11; Described elastic scraper mechanism 11 comprises scraper 6, and described scraper 6 is for radial dilatation under the effect of elastic force;
The outer wall of described wall scraper body 1 is also arranged with described storage sleeve 4, described storage sleeve 4 for sliding axially scraping after wall completes under the effect of axial force being greater than predetermined threshold value, radial load is applied to described scraper 6, makes described scraper 6 radial contraction, receive described scraper 6.
Specifically, wall scraper body 1 is hollow structure, in clean-out service process, the booty after the scraping of pit shaft middle sleeve can be transferred to ground by the hollow pipeline of wall scraper body 1, the outer wall of wall scraper body 1 is provided with elastic scraper mechanism 11, elastic scraper mechanism 11 is included in the scraper 6 of radial dilatation under the effect of elastic force, wall scraper body 1 outer wall is also arranged with storage sleeve 4, scrape wall complete after storage sleeve 4 slide axially under the responsive to axial force exceeding predetermined threshold value, the storage sleeve 4 slid axially applies radial load to described scraper 6, scraper 6 is radial contraction under the effect of radial load, after the scraper 6 of radial contraction is all accommodated in and receives sleeve 4, stopping slides axially by storage sleeve 4.
Wherein, axial force provides by the pressure reduction of fluid cylinder mechanism, can also be provided by the elastic force of spring.
The quantity of the storage sleeve 4 in Fig. 1 is two, realizes the storage to scraper by the relative sliding of the storage sleeve 4 of both sides; In other implementations of the present utility model, the quantity of storage sleeve 4 also can be one, after scraper being accommodated in storage sleeve, needing stopping means and makes storage sleeve stop sliding axially.
In the present embodiment, wall scraper comprises: wall scraper body, elastic scraper mechanism, storage sleeve; Wherein, described wall scraper body is hollow structure, and the outer wall of described wall scraper body is provided with described elastic scraper mechanism; Described elastic scraper mechanism comprises scraper, and described scraper is used for radial dilatation under the effect of elastic force; The outer wall of described wall scraper body is also arranged with described storage sleeve, described storage sleeve is used for sliding axially under the effect of axial force being greater than predetermined threshold value scraping after wall completes, radial load is applied to described scraper, make described scraper radial contraction, receive described scraper, wall scraper realizes scraper by storage sleeve sheathed on the outer wall of wall scraper body and reclaims, and namely scraper is locked in retracted state scraping after wall operation completes.Can prevent scraper from surprisingly opening after barefoot interval runs into scraping, existing wall scraper can not enter barefoot interval problem owing to easily meeting card can be overcome, thus can complete scraping wall and clean-out service in the process to make a trip for a time, decrease one trip operation, effectively improve the efficiency of scraping wall clean-out service, reduce operating cost.
Fig. 2 is the structural representation of another embodiment of the utility model wall scraper.As shown in Figure 2, the wall scraper of the present embodiment, on the basis of structure embodiment illustrated in fig. 1, further, the outer wall of described wall scraper body 1 is also provided with stopping mechanism 8, makes the unidirectional slip vertically of described storage sleeve 4 for acting on described storage sleeve 4.
In a kind of possible implementation of the present embodiment, described stopping mechanism 8, comprising:
Fixed cover is located at the retaining ring on the outer wall of described wall scraper body, and the excircle of described retaining ring is provided with retaining ratchet, and the inwall of described storage sleeve 4 is provided with the ratchet matched with described retaining ratchet.
Specifically, the present embodiment prevents storage sleeve 4 unexpected retrogressing and make scraper 6 open generation lock of tool drilling after storage scraper by arranging stopping mechanism 8.The concrete structure of stopping mechanism does not limit, as long as can realize storage, sleeve 4 is unidirectional vertically slides.
Alternatively, stopping mechanism 8 is located at the retaining ring on wall scraper body 1 for fixed cover, the excircle of retaining ring is provided with retaining ratchet, and the inwall of storage sleeve 4 is provided with the ratchet matched with retaining ratchet.This kind of stopping mechanism 8 structure is simple, is easy to realize, and processing and assembling are all without difficulty.
Retaining ring can be fixed on wall scraper body 1 by shear pin.
In a kind of possible implementation of the utility model embodiment, the quantity of described storage sleeve 4 is one or two;
When the quantity of described storage sleeve 4 is one, the outer wall of described wall scraper body 1 is provided with stopping means, for described storage sleeve 4 position-limiting actions.
When the quantity of described storage sleeve 4 is two, two described storage sleeves 4 relative sliding under the effect of axial force, receives described scraper 6.
Specifically, the quantity of storage sleeve 4 can be one and also can be two, when the quantity of receiving sleeve 4 is one, rear storage sleeve 4 stopping slip having been received in order to realize scraper 6, stopping means can be set on wall scraper body 1, storage sleeve 4 is acted on mutually with stopping means, thus stops mobile.As can by arranging stop nut or positive stop lug boss etc. on wall scraper body 1, when storage sleeve 4 rearward end of sliding is butted on stop nut or positive stop lug boss, thus stop mobile.
In wall scraper shown in Fig. 1, Fig. 2, storage sleeve 4 quantity be two, two storage sleeve 4 under the effect of axial force relative sliding to receive scraper 6.When employing two storage sleeve 4, when two storage sleeves 4 meet, naturally stop continuing to slide, now scraper 6 is also inevitable is all accommodated in storage sleeve 4.
In a kind of possible implementation of the utility model embodiment, as shown in Figure 2, the outer wall of described wall scraper body 1 is also provided with the fluid cylinder mechanism be connected with described storage sleeve 4, pressure chamber 9 is formed between described fluid cylinder mechanism and described wall scraper body 1, described wall scraper body 1 radially offers the pressure transmission hole 10 being communicated with described pressure chamber 9, pressure transmission hole 10 is for entering described pressure chamber 9 by the highly pressurised liquid in described wall scraper body 1 by described pressure transmission hole 10, form pressure reduction, the axial force produced by described pressure reduction promotes described fluid cylinder mechanism and drives described storage sleeve 4 to slide axially.
In a kind of possible implementation of the utility model embodiment, as shown in Figure 2, described fluid cylinder mechanism comprises joint ring 2 and liquid cylinder 3, described joint ring 2 is sealedly and fixedly connected with described wall scraper body 1, described liquid cylinder 3 is connected with described storage sleeve 4, described liquid cylinder 3 and respectively slipper seal, described joint ring 2 and mineralization pressure chamber between described liquid cylinder 3 and described wall scraper body 1 between described joint ring 2 and described wall scraper body 1.
Specifically, as shown in Figure 2, the pressure reduction that the axial force putting on storage sleeve 4 is produced by fluid cylinder mechanism provides.Make wall scraper body 1 inside produce higher pressure in the present embodiment by building the pressure in wall scraper body 1 inside, this higher pressure is passed to the fluid cylinder mechanism of wall scraper body 1 outside, due to wall scraper body 1 inside build the pressure after pressure be greater than outside pressure, so fluid cylinder mechanism applies axial force in storage sleeve 4 under the effect of pressure reduction.The concrete structure that the present embodiment provides is as follows: wall scraper body 1 outer wall is provided with and the fluid cylinder mechanism of receiving sleeve 4 and being connected, pressure chamber 9 is formed between fluid cylinder mechanism and wall scraper body 1, the radial pressure transmission hole 10 having connection pressure chamber 9 on wall scraper body 1, built the pressure by inside, inside builds the pressure can by blocking the hollow pipeline upper end of wall scraper body 1, liquid in wall scraper body 1 produces high pressure, highly pressurised liquid enters pressure chamber 9 by pressure transmission hole 10, and the axial force that pressure reduction produces promotes fluid cylinder mechanism and drives storage sleeve 4 to slide axially.As long as the concrete structure of fluid cylinder mechanism can provide axial force under differential pressure action.
In a kind of possible implementation of the present embodiment, fluid cylinder mechanism comprises joint ring 2 and liquid cylinder 3, joint ring 2 and wall scraper body 1 are sealedly and fixedly connected, liquid cylinder 3 is connected with storage sleeve 4, liquid cylinder 3 and respectively slipper seal, joint ring 2 and mineralization pressure chamber 9 between liquid cylinder 3 and wall scraper body 1 between joint ring 2 and wall scraper body 1.Inside build the pressure produce highly pressurised liquid be passed to pressure chamber 9 by the pressure transmission hole 10 on wall scraper body 1, due to the existence of pressure reduction, liquid cylinder 3 produce move axially, thus drive storage sleeve 4 slide together.
In a kind of possible implementation of the utility model embodiment, described liquid cylinder 3 is structure as a whole or Split type structure with described storage sleeve 4;
The inwall of described liquid cylinder 3 is provided with for the ring packing platform with the slipper seal of described wall scraper body 1, the inwall of the side of described ring packing platform and described joint ring 2 slipper seal, be provided with space between the opposite side of described ring packing platform and described stopping mechanism 8, described space can slide axially under the promotion of described liquid cylinder 3 for making described storage sleeve 4.
Specifically, as shown in Figure 2, liquid cylinder 3 can be Split type structure with storage sleeve 4, also can be structure as a whole.The inwall of liquid cylinder 3 is formed the ring packing platform be used for wall scraper body 1 slipper seal, the inwall of the side of ring packing platform and joint ring 2 slipper seal, be provided with space between the opposite side of described ring packing platform and described stopping mechanism 8, the inwall of the opposite side of described ring packing platform can form the ratchet acted on retaining ring 8.During Split type structure, described liquid cylinder 3 can be fixed by alignment pin with described storage sleeve 4.
In a kind of possible implementation of the utility model embodiment, described joint ring 2 is Split type structure or integrative-structure with described wall scraper body 1;
When described joint ring 2 is Split type structure with described wall scraper body 1, described joint ring 2 is fixed by screw thread and alignment pin with described wall scraper body 1;
When described joint ring 2 is structure as a whole with described wall scraper body 1, the outer wall of described joint ring 2 is provided with annular protrusion, for making described joint ring 2 and the slipper seal of described liquid cylinder 3.
Specifically, as shown in Figure 2, joint ring 2 and wall scraper body 1 can be Split type structure, also can be structure as a whole.When adopting Split type structure, joint ring 2 and wall scraper body 1 are fixed by screw thread and alignment pin.When adopting integrative-structure, the outer wall of joint ring 2 is formed annular protrusion can by joint ring 2 and liquid cylinder 3 slipper seal.Certainly, in order to easy to assembly, wall scraper body 1 also can adopt Split type structure, and namely wall scraper body 1 is formed by connecting by two sections or multistage.
In a kind of possible implementation of the utility model embodiment, as shown in Figure 2, described storage sleeve 4 is fixed by shear pin 5 and described wall scraper body 1, after described storage sleeve 4 cuts off described shear pin 5 under the effect of axial force being greater than predetermined threshold value, described storage sleeve 4 slides axially.
Specifically, as shown in Figure 2, receiving scraper 6 in order to avoid receiving sleeve 4 accidental movement before scraping wall and completing, therefore setting a predetermined threshold value, when only having axial force to be greater than this predetermined threshold value, storage sleeve 4 just starts to slide axially.In the present embodiment, storage sleeve 4 passes through shear pin 5 to be fixed with wall scraper body 1, receives sleeve 4 unexpected slip before preventing the axial force acted on storage sleeve 4 from reaching predetermined threshold value by shear pin 5.After storage sleeve 4 cuts off shear pin 5 under the responsive to axial force being greater than predetermined threshold value, storage sleeve 4 just can slide axially.
In a kind of possible implementation of the utility model embodiment, described storage sleeve is formed with interior inclined-plane near the end of described scraper side, the end of described scraper has the outer inclined-plane with slopes which match in storage sleeve, when described storage sleeve slides to described scraper vertically, the interior inclined-plane of described storage sleeve and the outer inclined-plane of described scraper act on described spatulate radially power mutually, described scraper radial contraction under the effect of described radial load.
Specifically, as shown in Figure 2, scraper 6 is formed with outer inclined-plane near storage sleeve 4 side, and the axial force that storage sleeve 4 applies is converted into radial load by this outer inclined-plane, thus makes scraper 6 radial contraction.In order to strengthen storage effect, storage sleeve 4 near the end of scraper 6 side be formed to match with the outer inclined-plane of scraper 6 in inclined-plane, when storage sleeve 4 slides to scraper 6 vertically, the storage interior inclined-plane of sleeve 4 acts on mutually with the outer inclined-plane of scraper and forms radial load to scraper 6, scraper 6 is radial contraction under radial load effect, thus is accommodated in storage sleeve 4.
In a kind of possible implementation of the utility model embodiment, as shown in Figure 2, the outer wall of described wall scraper body 1 is provided with blade groove, described scraper 6 is located in described blade groove, spring 7 is also provided with in described blade groove, described spring 7 is connected with described scraper 6, for the radial load of applying radial dilatation to described scraper 6.
Specifically, as shown in Figure 2, scraper 6 is located in blade groove, is provided with spring 7 in blade groove, and spring 7 applies the radial load of radial dilatation to scraper 6.The interior inclined-plane of storage sleeve 4 is spacing to scraper 6 radial dilatation, avoids scraper 6 to deviate from blade groove.
Fig. 3 is the flow chart that wall method one embodiment scraped by the utility model well-flushing.As shown in Figure 3, wall method scraped by the well-flushing of the present embodiment, wall well-flushing instrument is scraped in employing, described in scrape wall well-flushing instrument and comprise: arbitrary wall scraper, centralizer and drill string in the drill string connected successively, sliding sleeve switch, embodiment as depicted in figs. 1 and 2, described method comprises:
Step 301, by described scrape wall well-flushing instrument under enter in Oil/gas Well.
Step 302, with scraping well segment distance preset value after turn on pump circulate, if circulation is normal, then along screw thread link closely direction rotate described in scrape wall well-flushing instrument described wall well-flushing instrument of scraping continued to transfer, transfer to described scraping well section place, and then on carry described in scrape wall well-flushing instrument, repeated multiple times scraping.
Suppress from well head pitching after step 303, scraping complete, the scraper of described wall scraper is recycled in the storage sleeve of described wall scraper, then described wall well-flushing instrument of scraping is continued to transfer.
Step 304, transfer to well-flushing position, by washing out ground by scraping the foul chipped away after circulation well cleanup preset duration when described wall scraper.
Specifically, when scraping wall clean-out service, to connect at well head according to operating regulation and scrape wall well-flushing instrument, wall well-flushing tool configuration order of scraping from top to bottom is: drill string+sliding sleeve switch+wall scraper+centralizer+drill string, and wherein wall scraper can adopt the arbitrary wall scraper in embodiment as shown in Figure 1 and Figure 2; Above-mentioned all parts can be threaded connection.
By in the above-mentioned steady lower going-into-well cylinder of wall well-flushing instrument of scraping connected; Scraping wall well-flushing instrument hourly velocity under initial controls as 20-30 m/min (m/min), lower to being 5-10m/min apart from transferring speeds control during 50m before designing requirement scraping well section.
Close to scraping well section and turn on pump circulation normal after, limit slowly rotates and scrapes wall well-flushing instrument limit along screw thread direction of linking closely and slowly transfer, and then on carry and scrape the repeated multiple times scraping of wall well-flushing instrument, until scrape wall well-flushing instrument suspending weight to reach requirement.
Suppress from well head pitching after scraping completes and scraper is recycled in storage sleeve, then will scrape wall well-flushing instrument and continue to transfer, and when now wall scraper is by barefoot interval, there will not be the situation that wall scraper is tangled by barefoot interval and blocks; After storage, sliding sleeve switch by suppress ball income sliding sleeve switch in, until operation complete trip out scrape wall well-flushing instrument after ball is taken out.
Enter barefoot interval when wall scraper and down behind well-flushing position, wash out ground by huge discharge circulation well cleanup preset duration (as more than a week) by scraping the foul chipped away.
Use the wall scraper of the utility model embodiment, adopt same tubing string can realize scraping wall and clean-out service, thus reduce one trip operation, effectively improve operating efficiency, reduce operating cost.In use, the wall scraper of the utility model embodiment can two or more groups and use and can increase and scrape wall effect.
After clean-out service completes and trips out and scrape wall well-flushing instrument, first back out the joint ring 2 on liquid cylinder 3 both sides, special solution lock barrel is used to pack in liquid cylinder 3 from scraping wall well-flushing instrument both sides, twist with chain wrench and separate lock barrel and make it cut off safetied pin for being fixed on by retaining ring 8 on wall scraper body 1, now just liquid cylinder 3 can be taken out from both sides and make to scrape the unblock of wall well-flushing instrument.
Adopt the wall well-flushing instrument of scraping of the utility model embodiment to carry out operation, the instrument that removes for can complete scrapes the several work such as wall, well-flushing, greatly improves workover treatment work efficiency, saves the activity duration.Remove tool time for one time according to 6000 meters of well depth saving to calculate, activity duration 20 ~ 30 hours can be saved.Employing is scraped wall well-flushing instrument and is realized integration of operation once cost-saved about 200,000 yuan.Economic benefit is considerable.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (11)
1. a wall scraper, is characterized in that, comprising:
Wall scraper body, elastic scraper mechanism, storage sleeve;
Wherein, described wall scraper body is hollow structure, and the outer wall of described wall scraper body is provided with described elastic scraper mechanism; Described elastic scraper mechanism comprises scraper, and described scraper is used for radial dilatation under the effect of elastic force;
The outer wall of described wall scraper body is also arranged with described storage sleeve, described storage sleeve is used for sliding axially under the effect of axial force being greater than predetermined threshold value scraping after wall completes, radial load is applied to described scraper, makes described scraper radial contraction, receive described scraper.
2. wall scraper according to claim 1, is characterized in that, the outer wall of described wall scraper body is also provided with stopping mechanism, for making the unidirectional slip vertically of described storage sleeve with the effect of described storage sleeve.
3. wall scraper according to claim 2, is characterized in that, described stopping mechanism, comprising:
Fixed cover is located at the retaining ring on the outer wall of described wall scraper body, and the excircle of described retaining ring is provided with retaining ratchet, and the inwall of described storage sleeve is provided with the ratchet matched with described retaining ratchet.
4. the wall scraper according to any one of claim 1-3, is characterized in that, the quantity of described storage sleeve is one or two;
When the quantity of described storage sleeve is one, the outer wall of described wall scraper body is provided with stopping means, for playing position-limiting action to described storage sleeve;
When the quantity of described storage sleeve is two, two described storage sleeves relative sliding under the effect of axial force, receives described scraper.
5. the wall scraper according to Claims 2 or 3, it is characterized in that, the outer wall of described wall scraper body is also provided with the fluid cylinder mechanism with described storage sleeve connection, pressure chamber is formed between described fluid cylinder mechanism and described wall scraper body, described wall scraper body radially offers the pressure transmission hole being communicated with described pressure chamber, described pressure transmission hole is used for intrinsic for described wall scraper highly pressurised liquid to enter described pressure chamber by described pressure transmission hole, form pressure reduction, the axial force produced by described pressure reduction promotes described fluid cylinder mechanism and drives described storage sleeve to slide axially.
6. wall scraper according to claim 5, it is characterized in that, described fluid cylinder mechanism comprises joint ring and liquid cylinder, described joint ring and described wall scraper body are sealedly and fixedly connected, described liquid cylinder and described storage sleeve connection, described liquid cylinder and respectively slipper seal, described joint ring and mineralization pressure chamber between described liquid cylinder and described wall scraper body between described joint ring and described wall scraper body.
7. wall scraper according to claim 6, is characterized in that, described liquid cylinder and described storage sleeve are structure as a whole or Split type structure;
The inwall of described liquid cylinder is provided with for the ring packing platform with the slipper seal of described wall scraper body, the inwall of the side of described ring packing platform and described joint ring slipper seal, be provided with space between the opposite side of described ring packing platform and described stopping mechanism, described space can slide axially under the promotion of described liquid cylinder for making described storage sleeve.
8. wall scraper according to claim 6, is characterized in that, described joint ring and described wall scraper body are Split type structure or integrative-structure;
When described joint ring and described wall scraper body are Split type structure, described joint ring and described wall scraper body are fixed by screw thread and alignment pin;
When described joint ring and described wall scraper body are structure as a whole, the outer wall of described joint ring is provided with annular protrusion, for making described joint ring and described liquid cylinder slipper seal.
9. the wall scraper according to any one of claim 1-3, is characterized in that, described storage sleeve is fixed by shear pin and described wall scraper body.
10. the wall scraper according to any one of claim 1-3, it is characterized in that, described storage sleeve is formed with interior inclined-plane near the end of described scraper side, the end of described scraper has the outer inclined-plane with slopes which match in storage sleeve, when described storage sleeve slides to described scraper vertically, the interior inclined-plane of described storage sleeve and the outer inclined-plane of described scraper act on described spatulate radially power mutually, described scraper radial contraction under the effect of described radial load.
11. wall scrapers according to any one of claim 1-3, it is characterized in that, the outer wall of described wall scraper body is provided with blade groove, described scraper is located in described blade groove, also spring is provided with in described blade groove, described spring is connected with described scraper, and described spring is used for the radial load applying radial dilatation to described scraper.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367709.5U CN204804773U (en) | 2015-06-01 | 2015-06-01 | Scrape wall ware |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520367709.5U CN204804773U (en) | 2015-06-01 | 2015-06-01 | Scrape wall ware |
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| CN204804773U true CN204804773U (en) | 2015-11-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285563A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气股份有限公司 | Wall method scraped by wall scraper and well-flushing |
| CN110410038A (en) * | 2019-08-16 | 2019-11-05 | 中石化石油工程技术服务有限公司 | Scraper controllable type bores plug-drifting-and scrapes wall integral device and operation technique method |
| CN110939406A (en) * | 2019-12-11 | 2020-03-31 | 库尔勒施得石油技术服务有限公司 | Hydraulic wall scraper |
-
2015
- 2015-06-01 CN CN201520367709.5U patent/CN204804773U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285563A (en) * | 2015-06-01 | 2017-01-04 | 中国石油天然气股份有限公司 | Wall method scraped by wall scraper and well-flushing |
| CN106285563B (en) * | 2015-06-01 | 2019-08-02 | 中国石油天然气股份有限公司 | Wall scraper and well-flushing scrape wall method |
| CN110410038A (en) * | 2019-08-16 | 2019-11-05 | 中石化石油工程技术服务有限公司 | Scraper controllable type bores plug-drifting-and scrapes wall integral device and operation technique method |
| CN110939406A (en) * | 2019-12-11 | 2020-03-31 | 库尔勒施得石油技术服务有限公司 | Hydraulic wall scraper |
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