CN111648744A - Workover tubular column subassembly and reducing descaler thereof - Google Patents
Workover tubular column subassembly and reducing descaler thereof Download PDFInfo
- Publication number
- CN111648744A CN111648744A CN202010496584.1A CN202010496584A CN111648744A CN 111648744 A CN111648744 A CN 111648744A CN 202010496584 A CN202010496584 A CN 202010496584A CN 111648744 A CN111648744 A CN 111648744A
- Authority
- CN
- China
- Prior art keywords
- lower shell
- hollow pipe
- upper shell
- shell
- scraper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 32
- 230000006978 adaptation Effects 0.000 claims description 26
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007790 scraping Methods 0.000 description 18
- 230000009286 beneficial effect Effects 0.000 description 12
- 238000000034 method Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000012546 transfer Methods 0.000 description 9
- 239000012535 impurity Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
The invention relates to a workover string assembly and a reducing scale remover thereof. The reducing scale remover comprises an upper shell, a lower shell and a hollow pipe; the upper shell is provided with a connecting structure for connecting a casing pipe entering the well; the lower shell is provided with a window, and a scraper which can swing outwards is arranged in the window; a rotation stopping matching structure is arranged between the upper shell and the lower shell and can be close to or far away from each other; the hollow pipe is connected between the upper shell and the lower shell, a shear pin and a limiting matching structure are arranged between the hollow pipe and the upper shell, a driving spring is arranged between the hollow pipe and the lower shell, the upper shell blocks the lower shell along the axial direction, and the lower shell is prevented from being separated from the hollow pipe upwards; the hollow tube pushes the scraper to swing outwards when moving downwards relative to the lower shell. The reducing scale remover can scrape the inner wall of a shaft below the reducing part through the reducing part, so that the success rate of the separate production and separate injection downhole tool is improved.
Description
Technical Field
The invention relates to a workover string assembly and a reducing scale remover thereof.
Background
The method is an important process for well repair and normal downhole operation, and aims to improve the tool running success rate and the operation success rate (such as the setting success rate of a packer and the like), and particularly when the annular space between a well-running tool and the inner wall of a shaft is small, the next construction is carried out after full scraping so as to conveniently and smoothly run into various well-running tools.
Along with the increasing of the development age of the oil field, the underground shaft inevitably deforms and is damaged, and the drift diameter of the shaft is in a state of small top and large bottom due to the limitation of deformation reducing or patching restoration reducing. When the shaft below the deformation reducing part or the repairing reducing part is subjected to scraping construction in the well repairing operation process, the scraper matched with the shaft specification cannot repair the reducing part through the deformation reducing part or the repairing reducing part. Therefore, foreign matters on the inner wall of the shaft below the deformed reducing part or the repaired reducing part cannot be effectively removed, and therefore the divided production separate injection downhole tool such as a packer cannot be smoothly put into the shaft and the well repairing quality cannot be effectively guaranteed.
Disclosure of Invention
The invention aims to provide a reducing scaler for solving the problem that the existing scaler cannot remove foreign matters on the inner wall of a shaft below a reducing part, and the invention also aims to provide a workover string component for solving the problem that the existing workover string component cannot remove the foreign matters on the inner wall of the shaft below the reducing part.
In order to achieve the purpose, the technical scheme of the variable-diameter descaler is as follows: the reducing scale remover comprises an upper shell, a lower shell and a hollow pipe;
the upper shell is provided with a connecting structure for connecting a casing pipe entering the well;
the lower shell is provided with a window, and a scraper which can swing outwards is arranged in the window;
a rotation stopping matching structure is arranged between the upper shell and the lower shell and can be close to or far away from each other;
the hollow pipe is connected between the upper shell and the lower shell, a shear pin and a limiting matching structure are arranged between the hollow pipe and the upper shell, and the limiting matching structure is used for preventing the hollow pipe from falling off the upper shell downwards;
a driving spring is arranged between the hollow pipe and the lower shell and applies a force for driving the hollow pipe to move downwards relative to the lower shell to the hollow pipe;
the upper shell blocks the lower shell along the axial direction to prevent the lower shell from separating from the hollow pipe upwards;
the hollow tube pushes the scraper to swing outwards when moving downwards relative to the lower shell.
The variable-diameter scaler has the beneficial effects that: when the reducing descaling device is used, the upper shell is connected with the well-entering sleeve, then the reducing descaling device is put into a shaft through the well-entering sleeve, the hollow pipe is fixed on the upper shell through the shear pin, the scraper does not extend outwards, and the reducing scraping descaling device is in a state of small radial size and can smoothly pass through a deformed reducing part and repair the reducing part. When the reducing scraping descaling device reaches a designated place, the sealing steel ball is thrown into the well casing, and falls to the top of the hollow pipe to block the cavity inside the hollow pipe. The well casing is pressed from the well mouth, pressure acts on the sealing steel balls and the hollow pipe, the shear pin is cut off by the acting force of the hollow pipe and the upper shell on the shear pin, the hollow pipe moves downwards relative to the lower shell under the action of the driving spring to push the scraper to move outwards, and the variable-diameter descaling device is in a large radial size state and is attached to the inner wall of the well shaft. The casing pipe is gone into to the rotation, and the casing rotates in order to strike off the foreign matter on the pit shaft inner wall with scraper rotation under the casing is driven through last casing and spline cooperation structure to the casing of going into the well. After the foreign matters are removed, the well casing is lifted up until the scraper interferes with the deformation reducing part or the repair reducing part, the well casing is continuously lifted up, the well casing drives the upper shell to be separated from the lower shell, the upper shell drives the hollow pipe through the limit matching structure to overcome the acting force of the driving spring so that the hollow pipe moves upwards relative to the lower shell, the hollow pipe is removed from being matched with the scraper, the scraper can swing inwards, the reducing scraping descaler is recovered to be in a state with a smaller radial size, and the descaling device can be smoothly taken out from the well casing through the deformation reducing part and the repair reducing part, so that the scraping operation of the well casing is completed.
Furthermore, a return spring is arranged between the lower shell and the scraper;
the return spring applies a force to the scraper that swings the scraper inward.
The variable-diameter descaling device has the beneficial effects that the variable-diameter descaling device is ensured not to interfere with the deformed reduced-diameter part and the repaired reduced-diameter part when being put in and taken out.
Further, the device also comprises a baffle plate, wherein the baffle plate is fixedly connected with the lower shell;
the return spring comprises an outer end and an inner end; ,
the outer end of the reset spring is propped against the baffle, and the inner end of the reset spring is propped against the scraper.
The novel knife board has the beneficial effect that the reset spring and the knife board are convenient to mount.
Furthermore, a spring accommodating groove is formed in the scraper, and the reset spring is arranged in the spring accommodating groove.
The scraper has the advantages that the spring has a compressible stroke with a long length, so that the scraper has a large outward swinging distance, and reliable removal of sundries on the wall of the wellbore is guaranteed.
Furthermore, a pressing sealing structure is arranged between the hollow pipe and the upper shell.
The nail cutter has the beneficial effect of improving the success rate of cutting off the shear nails.
Furthermore, an anti-falling back cap is arranged at the upper end of the hollow pipe and is fixedly connected to the peripheral surface of the top of the hollow pipe;
the upper shell is provided with a step surface, and the step surface and the anti-falling back cap form the limiting matching structure.
The hollow pipe has the beneficial effects that compared with the mode of directly forming the radial bulge on the hollow pipe, the processing is simpler.
Further, the shear pin insertion hole is formed in the anti-falling back cap.
The anti-dropping back cap has the advantages that the anti-dropping back cap is only needed to be replaced when the shear pin inserting hole is damaged, and the cost is low.
Further, the torque transmission plate is further included, and a torque transmission flat groove is machined on the hollow pipe;
an upper shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the upper shell;
a lower shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the lower shell;
the torque transmission plate is arranged in the torque transmission flat groove, the upper shell adaptation flat groove and the lower shell adaptation flat groove;
the rotation stopping matching structure consists of a torque transmission plate, a torque transmission flat groove, an upper shell adaptation flat groove and a lower shell adaptation flat groove.
The novel torque transmission plate has the advantages that only the torque transmission plate needs to be replaced when the torque transmission plate is worn, and the required cost is low.
Furthermore, a shell sealing structure is arranged between the hollow tube and the lower shell, and the shell sealing structure is arranged below the driving spring.
The beneficial effect is that the impurity is prevented from influencing the work of the driving spring.
The technical scheme of the well repairing pipe column assembly is as follows: the workover string component comprises a well casing and a reducing scale remover;
the reducing scale remover comprises an upper shell, a lower shell and a hollow pipe;
the upper shell is provided with a connecting structure for connecting a casing pipe entering the well;
the lower shell is provided with a window, and a scraper which can swing outwards is arranged in the window;
a rotation stopping matching structure is arranged between the upper shell and the lower shell and can be close to or far away from each other;
the hollow pipe is connected between the upper shell and the lower shell, a shear pin and a limiting matching structure are arranged between the hollow pipe and the upper shell, and the limiting matching structure is used for preventing the hollow pipe from falling off the upper shell downwards;
a driving spring is arranged between the hollow pipe and the lower shell and applies a force for driving the hollow pipe to move downwards relative to the lower shell to the hollow pipe;
the upper shell blocks the lower shell along the axial direction to prevent the lower shell from separating from the hollow pipe upwards;
the hollow tube pushes the scraper to swing outwards when moving downwards relative to the lower shell.
The well repairing pipe column assembly has the beneficial effects that: the upper shell is connected with the well-entering casing, the reducing descaling device is then lowered into the well shaft through the well-entering casing, the hollow pipe is fixed on the upper shell through the shear pin, the scraper does not extend outwards, the reducing scraping descaling device is in a state with a small radial size, and the reducing descaling device can smoothly restore the reducing part through deformation and repair. When the reducing scraping descaling device reaches a designated place, the sealing steel ball is thrown into the well casing, and falls to the top of the hollow pipe to block the cavity inside the hollow pipe. The well casing is pressed from the well mouth, pressure acts on the sealing steel balls and the hollow pipe, the shear pin is cut off by the acting force of the hollow pipe and the upper shell on the shear pin, the hollow pipe moves downwards relative to the lower shell under the action of the driving spring to push the scraper to move outwards, and the variable-diameter descaling device is in a large radial size state and is attached to the inner wall of the well shaft. The casing pipe is gone into to the rotation, and the casing rotates in order to strike off the foreign matter on the pit shaft inner wall with scraper rotation under the casing is driven through last casing and spline cooperation structure to the casing of going into the well. After the foreign matters are removed, the well casing is lifted up until the scraper interferes with the deformation reducing part or the repair reducing part, the well casing is continuously lifted up, the well casing drives the upper shell to be separated from the lower shell, the upper shell drives the hollow pipe through the limit matching structure to overcome the acting force of the driving spring so that the hollow pipe moves upwards relative to the lower shell, the hollow pipe is removed from being matched with the scraper, the scraper can swing inwards, the reducing scraping descaler is recovered to be in a state with a smaller radial size, and the descaling device can be smoothly taken out from the well casing through the deformation reducing part and the repair reducing part, so that the scraping operation of the well casing is completed.
Furthermore, a return spring is arranged between the lower shell and the scraper;
the return spring applies a force to the scraper that swings the scraper inward.
The variable-diameter descaling device has the beneficial effects that the variable-diameter descaling device is ensured not to interfere with the deformed reduced-diameter part and the repaired reduced-diameter part when being put in and taken out.
Further, the device also comprises a baffle plate, wherein the baffle plate is fixedly connected with the lower shell;
the return spring comprises an outer end and an inner end; ,
the outer end of the reset spring is propped against the baffle, and the inner end of the reset spring is propped against the scraper.
The novel knife board has the beneficial effect that the reset spring and the knife board are convenient to mount.
Furthermore, a spring accommodating groove is formed in the scraper, and the reset spring is arranged in the spring accommodating groove.
The scraper has the advantages that the spring has a compressible stroke with a long length, so that the scraper has a large outward swinging distance, and reliable removal of sundries on the wall of the wellbore is guaranteed.
Furthermore, a pressing sealing structure is arranged between the hollow pipe and the upper shell.
The nail cutter has the beneficial effect of improving the success rate of cutting off the shear nails.
Furthermore, an anti-falling back cap is arranged at the upper end of the hollow pipe and is fixedly connected to the peripheral surface of the top of the hollow pipe;
the upper shell is provided with a step surface, and the step surface and the anti-falling back cap form the limiting matching structure.
The hollow pipe has the beneficial effects that compared with the mode of directly forming the radial bulge on the hollow pipe, the processing is simpler.
Further, the shear pin insertion hole is formed in the anti-falling back cap.
The anti-dropping back cap has the advantages that the anti-dropping back cap is only needed to be replaced when the shear pin inserting hole is damaged, and the cost is low.
Further, the torque transmission plate is further included, and a torque transmission flat groove is machined on the hollow pipe;
an upper shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the upper shell;
a lower shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the lower shell;
the torque transmission plate is arranged in the torque transmission flat groove, the upper shell adaptation flat groove and the lower shell adaptation flat groove;
the rotation stopping matching structure consists of a torque transmission plate, a torque transmission flat groove, an upper shell adaptation flat groove and a lower shell adaptation flat groove.
The novel torque transmission plate has the advantages that only the torque transmission plate needs to be replaced when the torque transmission plate is worn, and the required cost is low.
Furthermore, a shell sealing structure is arranged between the hollow tube and the lower shell, and the shell sealing structure is arranged below the driving spring.
The beneficial effect is that the impurity is prevented from influencing the work of the driving spring.
Drawings
FIG. 1 is a cross-sectional view of a reducer scale remover in embodiment 1 of a well servicing string assembly of the present invention (when shear pins are not sheared);
FIG. 2 is a three dimensional view of the reducer scale in embodiment 1 of the present invention workover string assembly (when shear pins are not sheared);
FIG. 3 is a schematic view of the reducer of embodiment 1 of the present invention (when shear pins are not sheared);
in the figure: 1. the anti-dropping back cap comprises an upper joint, 2, shear pins, 3, an upper shell body, 4, a lower shell, 5, a scraper, 6, a baffle, 7, a lower joint, 8, a sealing steel ball, 9, a first sealing ring, 10, an anti-dropping back cap, 11, a torque transmission plate, 12, a driving spring, 13, a second sealing ring, 14, a hollow tube, 15, a reset spring, 16 and a screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the application, i.e., the embodiments described are only a subset of, and not all embodiments of the application. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present application are described in further detail below with reference to examples.
The workover string subassembly of this application is applicable to undergauge pit shaft and non-undergauge pit shaft, the concrete embodiment 1 of workover string subassembly of this application: the workover string component comprises a well casing (not shown in the figure) and a variable-diameter cleaner, as shown in figure 1, the variable-diameter cleaner comprises an upper shell, a lower shell 4 and a hollow pipe 14 connected between the upper shell and the lower shell 4, the upper shell comprises an upper joint 1 and an upper shell main body 3, the upper part of the upper joint 1 is provided with female threads connected with the well casing, and the female threads form a connecting structure. The lower part of top connection 1 is equipped with the pin thread that is used for being connected with last casing main part 3, and the upper portion of going up casing main part 3 is provided with the box thread that is used for with the pin thread adaptation of top connection 1 lower part, and the below that lies in the box thread on going up casing main part 3 is equipped with annular step face.
An anti-drop back cap 10 is arranged at the upper end of the hollow pipe 14, and the anti-drop back cap 10 is fixed on the outer peripheral surface of the top of the hollow pipe 14 in a threaded connection mode. The upper joint 1 is provided with a shear pin 2, the anti-drop back cap 10 is provided with a shear pin insertion hole for inserting the shear pin 2, and the shear pin 2 is used for enabling the upper shell and the hollow pipe 14 to have a fixed axial relative position in an initial state. Go up annular step face on the casing main part 3 and spacing anti-disengaging back of the body cap 10, avoid hollow tube 14 to deviate from down and go up the casing, annular step face constitutes spacing cooperation structure with anti-disengaging back of the body cap 10 jointly.
Be equipped with the sealing washer holding tank on the outer peripheral face of anticreep back of the body cap 10, be equipped with first sealing washer 9 in the sealing washer holding tank, first sealing washer 9 is used for realizing the sealed cooperation between anticreep back of the body cap 10 and the top connection 1, when suppressing to going into the well casing pipe from the wellhead, avoids high-pressure fluid to leak from the clearance between hollow tube 14 and the last casing, influences the anticipated result of suppressing the operation, and first sealing washer 9 constitutes suppresses seal structure. The upper end of hollow tube 14 is equipped with sealed domatic, and sealed domatic is used for realizing the shutoff to the inside cavity of hollow tube 14 with the cooperation of sealed steel ball 8 to realize the downward movement of hollow tube 14 for last casing through the mode that the well head was suppressed.
Lower extreme threaded connection of casing 4 has lower clutch 7 down, and 7 upper ends of lower clutch are equipped with the female screw that is used for with 4 threaded connection of casing down, and the lower extreme of casing 4 is equipped with the male screw that is used for with the female screw adaptation of 7 upper ends of lower clutch down, and other well tools of entering can be connected according to the in-service use demand to the male screw.
As shown in fig. 2 and 3, a baffle 6 is arranged at a position opposite to the insertion groove at the window of the lower shell 4, the baffle 6 is fixed on the lower shell 4 through a screw 16, the baffle 6 comprises a protruding part protruding into the window, a spring accommodating groove is arranged on the scraping part of the scraper 5, the position of the spring accommodating groove corresponds to the protruding part of the baffle 6, a return spring 15 is arranged in the spring accommodating groove, the outer end of the return spring 15 abuts against the protruding part of the baffle 6, the inner end of the return spring 15 abuts against the groove wall of the spring accommodating groove, the return spring 15 is used for applying an acting force for resetting the scraper 5 to the scraper 5, and when the hollow tube 14 does not push the scraper 5 to swing outwards, the return spring 15 makes the scraper 5 in a reset state, so that the descaling device can be smoothly put into the shaft.
An annular stopping bulge is arranged on the outer peripheral surface of the hollow tube 14, an annular step is arranged on the inner wall of the lower shell 4, a driving spring 12 is arranged between the annular stopping bulge and the annular step, the driving spring 12 drives the hollow tube 14 to move downwards relative to the lower shell 4 towards the hollow tube 14, and the driving spring 12 prevents the hollow tube 14 from falling out of the lower shell 4 downwards. The drive spring 12 exerts a force on the lower housing 4 which presses the lower housing 4 against the upper housing, without the shear pin 2 shearing off. When the hollow tube 14 moves downward relative to the lower casing 4, it will push the scraper 5 causing the scraper 5 to swing outward and restraining the scraper 5 in a circumferentially convex position relative to the lower casing 4. The lower end of the hollow pipe 14 is provided with a chamfer, so that stress concentration of the hollow pipe 14 when the scraper 5 is pushed is reduced, and the scraping effect is prevented from being influenced by abrasion deformation at the outer edge of the lower end of the hollow pipe 14.
And a sealing ring mounting groove is formed in the annular stop bulge, a second sealing ring 13 is arranged in the sealing ring mounting groove, the second sealing ring 13 is used for preventing impurities in a shaft from entering the driving spring 12 to influence the normal work of the driving spring 12 in the use process of the workover string component, and the second sealing ring 13 forms a shell sealing structure.
The workover string component further comprises a torque transfer plate 11, a torque transfer flat groove is formed in the outer peripheral surface of the hollow pipe 14, an upper shell adaptation flat groove is formed in the position, corresponding to the torque transfer flat groove, of the upper shell body 3, and a lower shell adaptation flat groove is formed in the position, corresponding to the torque transfer flat groove, of the lower shell body 4. Torque transfer board 11 holds in torque transfer flat slot, the flat slot of last casing adaptation and the flat slot of casing adaptation down, and torque transfer board 11 is after suppressing to the well casing pipe, transmits the moment of torsion between last casing and lower casing 4 to drive scraper 5 to rotate when rotatory well casing pipe that goes into, thereby strike off the foreign matter on the wall of a well bore. The torque transfer plate 11, the torque transfer flat groove, the upper shell adaptation flat groove and the lower shell adaptation flat groove form a rotation stopping matching structure.
The use of the embodiment 1 of the workover string assembly of the present invention: the upper shell is connected with the well casing, the reducing descaling device is then put into the well shaft through the well casing, the hollow pipe 14 is fixed on the upper shell through the shear pin 2, the scraper 5 does not extend outwards, and the reducing descaling device is in a state with a small radial size and can smoothly restore the reduced diameter part through deformation and patching. When the reducing scraping descaling device reaches a designated place, the sealing steel ball 8 is thrown into the well casing, and the sealing steel ball 8 falls to the top of the hollow pipe 14 to be matched with the sealing slope surface at the top of the hollow pipe 14 to plug the cavity inside the hollow pipe 14. The well casing is pressed from the well mouth, the pressure acts on the sealing steel ball 8 and the hollow pipe 14, the shear pin 2 is sheared by the acting force of the hollow pipe 14 and the upper shell to the shear pin 2, the hollow pipe 14 moves downwards relative to the lower shell 4 under the action of the driving spring 12 to push the scraper 5 to move outwards, and the variable-diameter descaling device is in a large radial size state and is attached to the inner wall of the well shaft. The well entering sleeve is rotated and drives the scraper 5 to rotate to scrape off foreign matters on the inner wall of the shaft through the rotation stopping matched upper shell and the lower shell 4. After the foreign matters are removed, the well casing is lifted up until the scraper 5 interferes with the deformation reducing part or the repair reducing part, the well casing is continuously lifted up, the well casing drives the upper shell to be separated from the lower shell 4, the upper shell drives the hollow pipe 14 to overcome the acting force of the driving spring 12 through the limit matching structure, so that the hollow pipe 14 moves upwards relative to the lower shell 4, the hollow pipe 14 is disengaged from the scraper 5, the scraper 5 can swing inwards and reset under the action of the resetting spring 15, the reducing scraping descaler is recovered to be in a state with a small radial size, and the reducing scraping scaler is smoothly taken out from the well shaft through the deformation reducing part and the repair reducing part, so that the scraping operation of the well shaft is completed.
The embodiment 2 of the workover string assembly of the present application differs from the embodiment 1 in that: the reducing descaling device is characterized in that a reset spring is not arranged, the upper end and the lower end of the scraping part are provided with slopes, and when the reducing section passes through the shaft, the reducing section extrudes the slopes to push the scraper to move inwards, so that the reducing descaling device smoothly passes through the reducing section of the shaft.
The embodiment 8 of the workover string assembly of the present application differs from embodiment 1 in that: the form that the axial inserted bar is arranged on the upper shell and the corresponding jack is arranged at the corresponding position of the lower shell is adopted, the rotation stopping matching of the upper shell and the lower shell is realized, and at the moment, the axial inserted bar and the jack jointly form a rotation stopping matching structure.
The present embodiment of the workover string assembly of claim 9 differs from embodiment 1 in that: the second sealing ring is not arranged, and the gap between the annular stopping bulge and the inner wall of the lower shell needs to be smaller at the moment, so that impurities entering the driving spring are reduced, and the working reliability of the driving spring is ensured.
The structure of the specific embodiment of reducing scaler of this application is the same with the structure of the reducing scaler in above-mentioned well workover tubular column subassembly, no longer gives unnecessary details.
The above description is only a preferred embodiment of the present application, and not intended to limit the present application, the scope of the present application is defined by the appended claims, and all changes in equivalent structure made by using the contents of the specification and the drawings of the present application should be considered as being included in the scope of the present application.
Claims (10)
1. Reducing scale remover, its characterized in that: comprises an upper shell, a lower shell and a hollow pipe;
the upper shell is provided with a connecting structure for connecting a casing pipe entering the well;
the lower shell is provided with a window, and a scraper which can swing outwards is arranged in the window;
a rotation stopping matching structure is arranged between the upper shell and the lower shell and can be close to or far away from each other;
the hollow pipe is connected between the upper shell and the lower shell, a shear pin and a limiting matching structure are arranged between the hollow pipe and the upper shell, and the limiting matching structure is used for preventing the hollow pipe from falling off the upper shell downwards;
a driving spring is arranged between the hollow pipe and the lower shell and applies a force for driving the hollow pipe to move downwards relative to the lower shell to the hollow pipe;
the upper shell blocks the lower shell along the axial direction to prevent the lower shell from separating from the hollow pipe upwards;
the hollow tube pushes the scraper to swing outwards when moving downwards relative to the lower shell.
2. The variable diameter cleaner according to claim 1, wherein: a return spring is arranged between the lower shell and the scraper;
the return spring applies a force to the scraper that swings the scraper inward.
3. The variable diameter cleaner according to claim 2, wherein: the baffle plate is fixedly connected with the lower shell;
the return spring comprises an outer end and an inner end;
the outer end of the reset spring is propped against the baffle, and the inner end of the reset spring is propped against the scraper.
4. The variable diameter cleaner according to claim 2 or 3, wherein: be equipped with the spring accommodation groove on the scraper, reset spring sets up in the spring accommodation groove.
5. The variable diameter descaler of claim 1, 2 or 3, wherein: and a pressing sealing structure is arranged between the hollow pipe and the upper shell.
6. The variable diameter descaler of claim 1, 2 or 3, wherein: the upper end of the hollow pipe is provided with an anti-falling back cap which is fixedly connected to the outer peripheral surface of the top of the hollow pipe;
the upper shell is provided with a step surface, and the step surface and the anti-falling back cap form the limiting matching structure.
7. The variable diameter descaler of claim 6, wherein: the shear pin insertion hole is formed in the anti-falling back cap.
8. The variable diameter descaler of claim 1, 2 or 3, wherein: the torque transmission plate is characterized by also comprising a torque transmission plate, wherein a torque transmission flat groove is processed on the hollow pipe;
an upper shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the upper shell;
a lower shell adaptation flat groove is arranged at the position, corresponding to the torque transmission flat groove, on the lower shell;
the torque transmission plate is arranged in the torque transmission flat groove, the upper shell adaptation flat groove and the lower shell adaptation flat groove;
the rotation stopping matching structure consists of a torque transmission plate, a torque transmission flat groove, an upper shell adaptation flat groove and a lower shell adaptation flat groove.
9. The variable diameter descaler of claim 1, 2 or 3, wherein: and a shell sealing structure is arranged between the hollow pipe and the lower shell and is arranged below the driving spring.
10. Well workover tubular column subassembly, its characterized in that: comprising a well casing and a variable diameter cleaner according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496584.1A CN111648744B (en) | 2020-06-03 | 2020-06-03 | Workover string subassembly and reducing descaler thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010496584.1A CN111648744B (en) | 2020-06-03 | 2020-06-03 | Workover string subassembly and reducing descaler thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111648744A true CN111648744A (en) | 2020-09-11 |
| CN111648744B CN111648744B (en) | 2022-07-19 |
Family
ID=72351186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010496584.1A Active CN111648744B (en) | 2020-06-03 | 2020-06-03 | Workover string subassembly and reducing descaler thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111648744B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU55021U1 (en) * | 2006-02-28 | 2006-07-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | DEVICE FOR CLEANING A WELL FROM PARAFFINO-ASPHALTEN DEPOSITS |
| CN204113169U (en) * | 2014-09-26 | 2015-01-21 | 孙杰文 | Milling fisher |
| CN204283333U (en) * | 2014-10-31 | 2015-04-22 | 中国石油化工集团公司 | Well cementing impact pressure self-closing valve |
| CN204457637U (en) * | 2015-02-05 | 2015-07-08 | 中石化石油工程技术服务有限公司 | Hydraulic variable diameter milling pipeline scraper |
| CN209855753U (en) * | 2019-03-29 | 2019-12-27 | 中海石油(中国)有限公司湛江分公司 | Diameter-variable pipe scraper |
| CN210087274U (en) * | 2019-03-25 | 2020-02-18 | 中海油能源发展股份有限公司 | Sand-flushing hydraulic cutting knife |
-
2020
- 2020-06-03 CN CN202010496584.1A patent/CN111648744B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU55021U1 (en) * | 2006-02-28 | 2006-07-27 | Открытое акционерное общество "Татнефть" им. В.Д. Шашина | DEVICE FOR CLEANING A WELL FROM PARAFFINO-ASPHALTEN DEPOSITS |
| CN204113169U (en) * | 2014-09-26 | 2015-01-21 | 孙杰文 | Milling fisher |
| CN204283333U (en) * | 2014-10-31 | 2015-04-22 | 中国石油化工集团公司 | Well cementing impact pressure self-closing valve |
| CN204457637U (en) * | 2015-02-05 | 2015-07-08 | 中石化石油工程技术服务有限公司 | Hydraulic variable diameter milling pipeline scraper |
| CN210087274U (en) * | 2019-03-25 | 2020-02-18 | 中海油能源发展股份有限公司 | Sand-flushing hydraulic cutting knife |
| CN209855753U (en) * | 2019-03-29 | 2019-12-27 | 中海石油(中国)有限公司湛江分公司 | Diameter-variable pipe scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111648744B (en) | 2022-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3662842A (en) | Automatic coupling system | |
| US5090102A (en) | Diesel injector sleeve remover | |
| CN204457637U (en) | Hydraulic variable diameter milling pipeline scraper | |
| CN113803020B (en) | Rapid leaking stoppage and production recovery method for horizontal well | |
| NO20121428A1 (en) | TORQUE LIMITATION DEVICE | |
| CN111648744B (en) | Workover string subassembly and reducing descaler thereof | |
| CN113898314A (en) | Quick drilling type sitting and squeezing integrated temporary plugging device | |
| CN112112591A (en) | Sleeve forging and milling tool and forging and milling method | |
| CN109209297B (en) | General scraping integrated tool | |
| CN111648736A (en) | Diameter-variable mill shoe for well repair and pipe column assembly using same | |
| CN114607308A (en) | Bridge plug fishing tool | |
| CN211370335U (en) | Integrated tool for milling and fishing and pipe column system | |
| CN110513070B (en) | Flap type downhole oil pipe hydraulic control blowout preventer | |
| CN207920589U (en) | A kind of oil pipe hydraulic pressure perforating device | |
| CN116066000B (en) | Casing sand blasting, slotting and cavity making tubular column and shaping operation method thereof | |
| CN220059475U (en) | Mechanical overload protector device | |
| CN212671709U (en) | Reverse well-backwashing oil drainage tool | |
| CN209244553U (en) | A kind of hydraulic casing pipeline scraper | |
| CN108979600B (en) | Oil pipe puncher and method for solving blocking problem of choke | |
| US3091290A (en) | Well bore milling apparatus | |
| CN108119108B (en) | Oil pipe hydraulic pressure perforating device | |
| CN216157620U (en) | Cutting and recycling integrated external cutting knife | |
| CA3186495A1 (en) | Wellbore staged operation method and rubber plug for said method | |
| CN107227942B (en) | Leak-stopping short-circuit device while drilling | |
| CN102296939B (en) | Automatic pressure-balancing expansion-catch integrated expandable tube tool and use method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |