CN213116212U - Damping-adjustable rotary well washing tool - Google Patents
Damping-adjustable rotary well washing tool Download PDFInfo
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- CN213116212U CN213116212U CN202021304547.8U CN202021304547U CN213116212U CN 213116212 U CN213116212 U CN 213116212U CN 202021304547 U CN202021304547 U CN 202021304547U CN 213116212 U CN213116212 U CN 213116212U
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Abstract
The utility model provides a rotatory well-flushing instrument of adjustable damping, well-flushing instrument includes: the damping adjusting assembly comprises a main shaft, a rotary spray head, a damping adjusting assembly and a guide head, wherein the main shaft comprises an upper connector and a lower mandrel, a central water hole penetrates through the upper connector and enters the lower mandrel, a plurality of bypass water holes communicated with the central water hole are formed in the side wall of the lower mandrel, and an external thread is arranged on the lower section of the lower mandrel; the rotary spray head comprises a spray head sleeve and a spray nozzle, a first annular cavity is formed between the inner wall of the spray head sleeve and the outer wall of the lower mandrel, the first annular cavity is communicated with the outside through a spray nozzle mounting groove, and the spray nozzle is mounted in the spray nozzle mounting groove; the pilot head is arranged below the rotary spray head and is fixed with the lower mandrel; a second annular cavity is formed among the lower mandrel, the rotary spray head and the pilot head; the damping adjustment assembly is positioned in the second annular cavity to adjust the damping of the rotary spray head. The utility model has the advantages of the rotary damping is adjustable, rotation speed is adjustable, improves the cleaning performance.
Description
Technical Field
The utility model belongs to the technical field of oil and natural gas drilling engineering downhole tool, particularly, relate to a rotatory well-flushing instrument of adjustable damping among well-flushing operation process.
Background
The problems of formation sand production, scaling, wax formation and the like often occur in the production process of oil and gas wells and water injection wells, and in addition, the phenomena of sand blocking and sand blocking occur in well completion, well workover and other operations. At present, the continuous pipe sand washing and well washing operation becomes a basic application of field construction, and is an essential important link in various complex operations. The well washing operation is mainly used for treating substances attached to the inner wall of a tubular column, such as oil dirt, wax dirt, rust dirt or salt dirt, of the production tubular column of the oil-gas well. The coiled tubing is combined with a high-pressure water jet cleaning technology to clean the tubular column, and compared with the traditional cleaning mode, the coiled tubing cleaning device is high in cleaning efficiency, simple to operate and free of environmental pollution. The basic principle is that the cleaning tool is used to jet high-speed jet flow to impact the inner surface of the pipe column, so as to collide, rub and shear with dirt and dirt, thereby achieving the purpose of cleaning and descaling.
The existing various well-flushing tools are basically divided into three types of sand-washing well-flushing tools, namely a porous nozzle, a swirl nozzle and a rotary nozzle. For the multi-hole nozzle tool, the fluid generates throttling when passing through the spray holes of the spray head, and high-speed jet flow is formed, so that the purpose of flushing is achieved, and the multi-hole nozzle tool is the most basic well flushing form; for the swirl nozzle tool, when the swirl nozzle tool works, fluid passes through the swirl generator, the track of the fluid is changed, the fluid is forced to flow along the guide direction of the swirl generator, the fluid generates three-dimensional speed, namely axial speed, radial speed and rotation, and finally the fluid is sprayed out in a conical high speed when passing through the nozzle, the sprayed fluid is in a conical shape, the tool has strong trafficability, can be applied to complex well operation, has certain rock breaking capacity, and has good cleaning effect; in the rotary nozzle tool, due to the eccentric installation of the nozzle, the outflow fluid generates reaction force to drive the spray head to rotate, the speed is controlled by the speed limiting ring, the rotating speed of the spray head is prevented from being too high, and certain standing flow time is ensured to be available for cleaning the pipe wall so as to achieve the cleaning effect.
The patent number is CN107747484A, and the name is that a rotatory efflux well washing device of high pressure water power discloses a rotatory efflux well washing device of high pressure water power, including port section, bearing frame, rotation axis, linkage segment and efflux section. The end port section upper end is opened there is the internal thread, and the lower extreme is opened there is the external screw thread, and end port section lower extreme and bearing frame threaded connection, the rotation axis pass through the bearing to be fixed in the bearing frame, rotation axis lower extreme and linkage segment threaded connection, linkage segment and efflux section threaded connection are equipped with lateral chamfer hole and top centre bore at efflux section head. The port section, the rotating shaft and the connecting section are all provided with central holes for liquid to flow. When the device works, the high-pressure water pipe is connected with the connecting port of the port section, the high-pressure water flows to the jet section and then forms lateral oblique jet flow through the lateral oblique jet hole on the jet section, the jet section is driven to rotate quickly by means of recoil force of the lateral oblique jet flow, the impact force is strong, the structure is compact and simple, and the effect of cleaning a water injection well is remarkable. The device is essentially a rotary nozzle tool without a rotation speed limiting function, and the situation that the rotating speed is too high to ensure the residence time of the flushing liquid flow on the pipe wall can occur in use, even when the rotating speed is too high due to high fluid pressure, the sprayed flushing liquid flow approaches to an atomized state, and the flushing capacity of the device is greatly reduced.
The patent number is CN202108436U, and the name is a hydraulic self-rotating nozzle for well washing, discloses a hydraulic self-rotating nozzle for well washing, comprises shower nozzle assembly, independent nozzle, center tube, speed-limiting mechanism, check valve etc. its technical characteristics are: a threaded hole is formed in a specific position of the spray head, and a spray nozzle is installed in a threaded connection mode; the two ends of the central tube are provided with rolling bearings which can play the role of a rotating shaft while conveying liquid, and a speed limiting mechanism on the rotating shaft realizes centrifugal speed limiting by using a friction block. The self-rotating spray head is also a rotary nozzle tool in nature, and is different from the CN107747484A patent in that a friction speed limiting mechanism is arranged inside the tool, so that the defect that the residence time of flushing liquid flow on the pipe wall cannot be ensured due to too high rotating speed is overcome. However, limiting speed simply by friction braking in the patent has three disadvantages: the friction force is fixed, the automatic adjustment cannot be realized according to the conditions of pressure, flow rate and the like of fluid in the pipe column, and the application range is narrow; the friction force is generated by heat generated by the sleeve and the friction block and cannot be discharged in time, so that the sleeve and the friction block are worn by heat, on one hand, the sleeve and the friction block are both easily damaged parts, the service life of the tool is greatly reduced, and the use cost and the maintenance difficulty are improved; on the other hand, when the sleeve and/or the friction block are worn to a certain degree, the friction force between the sleeve and the friction block is reduced compared with a preset value, so that the working performance of the tool cannot be guaranteed.
As a rotary well flushing tool, the two patents provide a design idea with certain value, but have great defects in the aspects of rotating speed control, rotating speed self-adjustment and reliability, and the rotary damping can not be adjusted on the basis of speed limiting and standing current, so that the effect of the tool for flushing a well is difficult to be exerted to the maximum.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve at least one of the above-mentioned not enough of prior art existence. For example, an object of the utility model is to provide a rotatory well-flushing instrument of adjustable damping that rotary damping is adjustable, prevent that shower nozzle rotation rate is too fast, improves the cleaning performance.
In order to achieve the above object, the utility model provides an adjustable damping rotary well-flushing tool. The well-flushing tool may comprise: the damping adjusting assembly comprises a main shaft, a rotary spray head, a damping adjusting assembly and a guide head, wherein the main shaft is provided with a central water hole arranged axially and comprises an upper connector and a lower mandrel which are connected up and down; the rotary spray head comprises a spray head sleeve and a plurality of nozzles, a first annular cavity is formed between the inner wall of the spray head sleeve and the outer wall of the lower mandrel and is communicated with the bypass water hole, a plurality of nozzle mounting grooves with the bottoms communicated with the first annular cavity are also formed in the spray head sleeve, the number of the nozzle mounting grooves is the same as that of the nozzles and can correspond to one another, and the nozzles are mounted in the nozzle mounting grooves in a corresponding relationship; the pilot head is arranged below the rotary spray head and is fixedly connected with the lower end part of the lower mandrel; a second annular cavity is formed among the lower mandrel, the rotary spray head and the pilot head, is positioned at the lower part of the first annular cavity and is not communicated with the first annular cavity; the damping adjustment assembly is positioned in the second annular cavity and comprises a backing ring, an adjusting spring and an adjusting nut which are sequentially sleeved on the lower mandrel from top to bottom, wherein the upper end surface of the backing ring is directly or indirectly contacted with the rotary spray head; one end of the adjusting spring acts on the backing ring, and the other end of the adjusting spring acts on the adjusting nut; the adjusting nut is provided with an internal thread matched with the external thread on the lower mandrel, and the adjusting nut is provided with a set screw along the radial direction, and the set screw fixes the position of the adjusting nut on the lower mandrel.
In one or more exemplary embodiments of the present invention, the well-flushing tool may further include a first bearing disposed between the rotary spray head and the upper joint, and a second bearing disposed between the rotary spray head and the backing ring.
In one or more exemplary embodiments of the present invention, the lower end of the pilot head may be conical or hemispherical.
In one or more exemplary embodiments of the present invention, on any cross section perpendicular to the central axis of the main shaft, the distance from the point where the main shaft intersects with the plane to the projection line of the central axis of the nozzle on the plane may be 5 to 25 mm.
In one or more exemplary embodiments of the present invention, an angle of the axis of the nozzle with the central axis of the main shaft in an axial plane thereof may be 15 ° to 90 °.
In one or more exemplary embodiments of the present invention, the inner diameter of the nozzle may be 1 to 10 mm.
In one or more exemplary embodiments of the present invention, the pilot head may be threadedly connected with the lower spindle.
In one or more exemplary embodiments of the present invention, the nozzle mounting groove may include an upper mounting groove, wherein the upper mounting groove includes a plurality of upper mounting holes that are provided on the same plane and are uniformly distributed along a circumference, and a distance between an axis of each upper mounting hole and a central axis of the main shaft is gradually reduced in an up-down direction.
In one or more exemplary embodiments of the present invention, the nozzle mounting groove may include a lower mounting groove, wherein the lower mounting groove includes a plurality of lower mounting holes that are provided on the same plane and are uniformly distributed along a circumference, and a distance between an axis of each lower mounting hole and a central axis of the main shaft increases gradually in an up-down direction.
Compared with the prior art, the beneficial effects of the utility model can include at least one item in following content:
(1) by utilizing the momentum conservation principle, a nozzle is arranged on the rotary spray head, so that axial, radial and circumferential three-dimensional speeds are generated when fluid flows out of the spray head, and circumferential reaction force of the fluid acting on the spray head drives the spray head to rotate;
(2) the rotary damping adjustable device which is coaxially arranged with the spray head can reduce the rotating speed of the spray head when the spray head rotates, prevent the rotating speed of the spray head from being too high, and ensure that liquid flow has certain standing time when the pipe wall is cleaned, thereby achieving the optimal cleaning effect.
Drawings
FIG. 1 illustrates a schematic structural view of an adjustable damping rotary well-flushing tool according to an exemplary embodiment of the present invention;
FIG. 2 is a schematic diagram of the damper adjustment assembly of FIG. 1;
FIG. 3 is a schematic view showing the structure of the rotary sprinkler head of FIG. 1;
FIG. 4 shows an axial cross-sectional view of the rotary spray head of FIG. 1;
fig. 5 shows a schematic view of the nozzle of fig. 1.
The reference numerals are explained below:
the device comprises a main shaft 1, a rotary spray head 2, a damping adjusting assembly 3, a guide head 4, an upper connector 11, a lower mandrel 12, a central water hole 121, a bypass water hole 122, a first annular cavity 21, a nozzle 22, a first bearing 23, a second bearing 24, an adjusting nut 31, an adjusting spring 32, a backing ring 33, a set screw 34 and an included angle between an alpha-nozzle and the main shaft.
Detailed Description
Hereinafter, the adjustable damping rotary well-flushing tool of the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
FIG. 1 illustrates a schematic structural view of an adjustable damping rotary well-flushing tool according to an exemplary embodiment of the present invention; FIG. 2 is a schematic diagram of the damper adjustment assembly of FIG. 1; FIG. 3 is a schematic view showing the structure of the rotary sprinkler head of FIG. 1; FIG. 4 shows an axial cross-sectional view of the rotary spray head of FIG. 1; fig. 5 shows a schematic view of the nozzle of fig. 1.
In an exemplary embodiment of the present invention, an adjustable damping rotary well-flushing tool may comprise: the main shaft, rotatory nozzle, assembly and leading head are adjusted in damping, wherein, the main shaft has the central water hole of axial setting and includes top connection and the lower part dabber of connecting from top to bottom, the central water hole has formed an opening at the up end of top connection, the bottom in central water hole is arranged in the lower part dabber, the radial dimension of top connection is greater than the radial dimension of lower part dabber, the bypass water hole of a plurality of and central water hole intercommunication has still been seted up on the lower part dabber lateral wall, the hypomere of lower part dabber still is provided with the external screw thread.
Specifically, as shown in fig. 1, the main shaft 1 is a cylinder-like structure including an upper joint 11 and a lower mandrel 12 fixedly connected, and an outer diameter of the upper joint 11 is larger than an outer diameter of the lower mandrel 12, thereby forming a step at a junction of the upper joint 11 and the lower mandrel 12. The main shaft 1 is provided with a central water hole 121 along the radial direction, and the central water hole 121 penetrates through the upper connector 11 and enters the lower mandrel 12. A plurality of bypass water holes 122 are radially arranged on the side wall of the lower mandrel 12 in a penetrating manner, the plurality of bypass water holes 122 are communicated with the central water hole 121, and the plurality of bypass water holes 122 are uniformly distributed along the same circumference. Fluid from the upstream components of the well cleaning tool enters the core water hole 121 and passes through the bypass water hole 122 to the exterior of the lower mandrel 12. Furthermore, the lower section of the lower mandrel 12 is provided with a thread on its outer wall for a fixed connection with the pilot head 4 and for the adjustment nut 31 to slide on the outer wall of the lower mandrel 12 for axial movement along the lower mandrel 12.
In this embodiment, rotatory nozzle includes nozzle cap and a plurality of nozzle, has formed first toroidal cavity between nozzle cap inner wall and the lower part dabber outer wall, and first toroidal cavity and bypass water hole intercommunication, nozzle cap are sheathe in and still are seted up the nozzle mounting groove of a plurality of bottom and first toroidal cavity intercommunication, and the quantity of nozzle mounting groove is the same with the quantity of nozzle and can the one-to-one, and the nozzle is installed in the nozzle mounting groove that is corresponding relation. Specifically, as shown in fig. 1 and 3 to 5, the rotary head 2 includes a head cap and a plurality of nozzles. Wherein, the nozzle sleeve is of a similar cylinder structure, and the nozzle sleeve is sleeved on the outer wall of the lower mandrel 12. The upper end of nozzle holder cover contacts with the step face on the main shaft 1, and the internal wall of nozzle holder cover is inwards sunken to form first toroidal cavity 21 between nozzle holder cover and lower part dabber 12 outer wall, first toroidal cavity 21 and a plurality of bypass water holes 122 intercommunication. The spray head sleeve body is also provided with a plurality of mounting grooves, and the mounting grooves penetrate through the sleeve body and are communicated with the first annular cavity. Each of the plurality of nozzles 22 corresponds to one of the mounting grooves, and the nozzles 22 are mounted in the mounting grooves such that the fluid in the central water hole 121 is injected through the nozzles after entering the first annular cavity 21 through the bypass water holes 122, thereby driving the rotary head to rotate. Here, the pressure fluid (for example, liquid) flows in from the upper joint 11 of the main shaft 1, passes through the bypass water hole 122 through the central water hole 121 of the lower mandrel 12, reaches the first annular cavity 21 inside the rotary spray head 2, and is sprayed out through the nozzle 22 of the rotary spray head 2 in a high-speed and high-pressure state, so as to clean the well wall. In the process, due to the principle of conservation of momentum, the nozzles 22 installed on the rotary spray head 2 generate three-dimensional velocities in the axial direction, the radial direction and the circumferential direction when the fluid flows out of the spray head, and the reaction force of the fluid acting on the circumferential direction of the rotary spray head 2 drives the rotary spray head 2 to rotate. As shown in fig. 3 and 4, the nozzle mounting groove may include an upper mounting groove, wherein the upper mounting groove includes a plurality of upper mounting holes disposed on the same plane and uniformly distributed along a circumference, and a distance between an axis of each upper mounting hole and a central axis of the main shaft is gradually decreased in a top-to-bottom direction. The nozzle mounting groove may include a lower mounting groove, wherein the lower mounting groove includes a plurality of lower mounting holes disposed on the same plane and uniformly distributed along a circumference, and a distance between an axis of each lower mounting hole and a central axis of the main shaft is gradually increased in an up-down direction. Here, in any cross section perpendicular to the axis of the main shaft, the distance (also referred to as an offset distance) from the point where the main shaft intersects the plane to the projection line of the nozzle axis on the plane may be 5 to 25 mm. The offset of the nozzle relative to the main axis is defined as: on any section perpendicular to the axis of the main shaft, the distance from the point formed by the intersection of the main shaft and the plane to the projection formed by the axis of the nozzle on the plane is the offset distance. The included angle between the axial line of the nozzle and the central axis of the main shaft in the axial plane can be 15-90 degrees. For example 50 deg.. The angle α of the nozzle relative to the main axis is defined as: in a plane containing the nozzle axis and parallel to the spindle axis (hereinafter referred to as a nozzle axis plane, simply referred to as a shaft plane), the nozzle axis and the spindle axis form an angle with respect to a projection of the plane. The inner diameter of the nozzle may be 1 to 10 mm. For example 3 mm. As shown in fig. 5, the outer wall of the lower end of the nozzle 22 is provided with screw threads, and the inner cavity of the upper end is provided with an inner hexagon, so that the nozzle can be conveniently installed in the nozzle installation groove. In addition, a sealing element can be arranged between the inner part of the nozzle sleeve of the rotary nozzle 2 and the outer wall of the lower mandrel.
In the embodiment, the pilot head is arranged below the rotary spray head and is fixedly connected with the lower end part of the lower mandrel; and a second annular cavity is formed among the lower mandrel, the rotary spray head and the pilot head, is positioned at the lower part of the first annular cavity and is not communicated with the first annular cavity. As shown in fig. 1, the pilot head 4 has a semi-closed cavity with an upward opening, the lower end of the lower mandrel 12 is inserted into the semi-closed cavity and fixedly connected with the pilot head 4, and the upper end of the pilot head 4 is fixedly connected with the lower end surface of the rotary spray head. The pilot head may be threadably connected to the lower spindle. Here, the pilot head 4 may be provided with threads on the inside of the semi-closed cavity, and the pilot head 4 is connected with the lower mandrel 12 through the threads. However, the present invention is not limited thereto, and the guide head and the lower spindle may be fixed by other methods. Furthermore, the lower end of the pilot head 4 may be conical or hemispherical. Through setting up 4 lower extremes of guide's head into toper or hemisphere, can guide well-flushing tool, the intraductal entering of convenience.
A second toroidal cavity may be formed between the lower mandrel outer wall, the rotating spray head inner wall, and the pilot head, the second toroidal cavity being located below the first toroidal cavity and not in communication with the first toroidal cavity, such that a damping adjustment assembly is disposed in the second toroidal cavity. Here, the second annular cavity may be disposed in the rotary spraying head, may also be disposed in the pilot head, may also be partially disposed in the rotary spraying head, and may also be partially disposed in the pilot head, as long as the damping adjustment assembly can be disposed to adjust the damping received by the rotary spraying head. As shown in fig. 1, the upper portion of the second toroidal cavity is located between the inner wall of the rotary spray head and the outer wall of the lower mandrel, and the lower portion of the second toroidal cavity is located between the inner wall of the pilot head and the outer wall of the lower mandrel.
In the embodiment, the damping adjustment assembly is positioned in the second annular cavity and comprises a backing ring, an adjusting spring and an adjusting nut which are sequentially sleeved on the lower mandrel from top to bottom, wherein the upper end surface of the backing ring is directly or indirectly contacted with the rotary spray head; one end of the adjusting spring acts on the backing ring, and the other end of the adjusting spring acts on the adjusting nut; the adjusting nut is provided with an internal thread matched with the external thread on the lower mandrel, and the adjusting nut is provided with a set screw along the radial direction, and the set screw fixes the position of the adjusting nut on the lower mandrel. Specifically, as shown in fig. 1 and 2, the damping adjustment assembly 3 is located in the second annular cavity and includes a backing ring 33, an adjustment spring 32 and an adjustment nut 31 which are sequentially sleeved on the lower mandrel 12 from top to bottom. The upper end surface of the backing ring 33 is directly or indirectly contacted with the rotary spray head 2; one end of the adjusting spring 32 is pressed on the backing ring 33, and the other end of the adjusting spring 32 is pressed on the adjusting nut 31; the adjusting nut 31 has an internal thread adapted to the external thread of the lower mandrel 12, and the adjusting nut 31 is provided with a set screw 34 along a radial direction, and the set screw 34 fixes the axial position of the adjusting nut 31 on the lower mandrel 12. The thrust of the adjusting spring 32 applied to the rotary sprayer 2 is adjusted by adjusting the axial position of the adjusting nut 31 on the lower mandrel 12, so that the damping borne by the rotary sprayer 2 is adjusted, and the purpose of adjusting the rotating speed of the rotary sprayer 2 is achieved. Here, the damping adjustment assembly 3 is used for adjusting proper rotary damping in advance to limit the rotating speed of the rotary nozzle 2, so as to prevent the rotating speed of the rotary nozzle 2 from being too high, and ensure a certain standing flow time of liquid flow when the pipe wall is cleaned, thereby achieving the optimal cleaning effect.
In another exemplary embodiment of the present invention, the damping adjustable rotary well-flushing tool may further include a first bearing disposed between the rotary nozzle and the upper joint, and a second bearing disposed between the rotary nozzle and the backing ring. Here, the first bearing 23 and the second bearing 24 are provided to release the rotational degree of freedom of the rotary head 2, so that the rotary head 2 can rotate in the circumferential direction of the main shaft 1 by the liquid flow backflushing action. In addition, the bearings are uniformly arranged at the upper end and the lower end of the rotary spray head 2, so that the rotary spray head is more stable in the rotating process, and eccentric wear caused by axial deflection of the rotary spray head 2 and the main shaft 1 due to unstable support of a single bearing is avoided.
To sum up, the beneficial effects of the utility model can include at least one of following:
(1) by arranging the rotary spray head, the axial, radial and circumferential three-dimensional speeds are generated when fluid flows out of the spray head by utilizing the momentum conservation principle, and the circumferential reaction force of the fluid on the spray head drives the spray head to rotate;
(2) the proper rotary damping is adjusted in advance by setting the damping adjusting assembly, so that the rotating speed of the rotary nozzle is limited, the rotating speed of the rotary nozzle is prevented from being too high, and the liquid flow has certain standing time when the pipe wall is cleaned, thereby achieving the optimal cleaning effect.
Although the present invention has been described above in connection with exemplary embodiments and the accompanying drawings, it will be apparent to those of ordinary skill in the art that various modifications may be made to the above-described embodiments without departing from the spirit and scope of the claims.
Claims (9)
1. An adjustable damping rotary well-flushing tool, characterized in that the well-flushing tool comprises: a main shaft, a rotary spray head, a damping adjusting assembly and a guide head, wherein,
the main shaft is provided with a central water hole which is axially arranged and comprises an upper connector and a lower mandrel which are connected up and down, the central water hole forms an opening on the upper end surface of the upper connector, the bottom of the central water hole is positioned in the lower mandrel, the radial size of the upper connector is larger than that of the lower mandrel, the side wall of the lower mandrel is also provided with a plurality of bypass water holes which are communicated with the central water hole, and the lower section of the lower mandrel is also provided with external threads;
the rotary spray head comprises a spray head sleeve and a plurality of nozzles, a first annular cavity is formed between the inner wall of the spray head sleeve and the outer wall of the lower mandrel and is communicated with the bypass water hole, a plurality of nozzle mounting grooves with the bottoms communicated with the first annular cavity are also formed in the spray head sleeve, the number of the nozzle mounting grooves is the same as that of the nozzles and can correspond to one another, and the nozzles are mounted in the nozzle mounting grooves in a corresponding relationship;
the pilot head is arranged below the rotary spray head and is fixedly connected with the lower end part of the lower mandrel;
a second annular cavity is formed among the lower mandrel, the rotary spray head and the pilot head, is positioned at the lower part of the first annular cavity and is not communicated with the first annular cavity;
the damping adjusting assembly is positioned in the second annular cavity and comprises a backing ring, an adjusting spring and an adjusting nut which are sequentially sleeved on the lower mandrel from top to bottom, wherein,
the upper end surface of the backing ring is directly or indirectly contacted with the rotary spray head;
one end of the adjusting spring acts on the backing ring, and the other end of the adjusting spring acts on the adjusting nut;
the adjusting nut is provided with an internal thread matched with the external thread on the lower mandrel, and the adjusting nut is provided with a set screw along the radial direction, and the set screw fixes the position of the adjusting nut on the lower mandrel.
2. The adjustable damping rotary well-flushing tool of claim 1, further comprising a first bearing disposed between the rotary spray head and the top sub, and a second bearing disposed between the rotary spray head and the backing ring.
3. The adjustable damping rotary well-flushing tool of claim 1, wherein the lower end of the pilot head is conical or hemispherical.
4. The adjustable damping rotary well-flushing tool of claim 1, wherein, in any plane perpendicular to the central axis of the main shaft, the distance from the point where the main shaft intersects the plane to the projection line of the central axis of the nozzle on the plane is 5-25 mm.
5. The adjustable damping rotary well-flushing tool of claim 1, wherein the axis of the nozzle in its axial plane makes an angle of between 15 ° and 90 ° with the central axis of the main shaft.
6. The adjustable damping rotary well-flushing tool of claim 1, wherein the nozzle has an inner diameter of 1-10 mm.
7. The adjustable damping rotary well-flushing tool of claim 1, wherein the pilot head is threaded with a lower mandrel.
8. The adjustable damping rotary well-flushing tool of claim 1, wherein the nozzle-mounting slot comprises an upper mounting slot, wherein,
go up the mounting groove including setting up on the coplanar and along a plurality of mounting holes that the circumference evenly distributed, along from the top down direction, the distance between the axis of every last mounting hole and the main shaft central axis reduces gradually.
9. The adjustable damping rotary well-flushing tool of claim 1, wherein the nozzle-mount channel comprises a lower-mount channel, wherein,
the lower mounting groove comprises a plurality of lower mounting holes which are arranged on the same plane and are uniformly distributed along the circumference, and the distance between the axis of each lower mounting hole and the central axis of the main shaft is gradually increased along the direction from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304547.8U CN213116212U (en) | 2020-07-06 | 2020-07-06 | Damping-adjustable rotary well washing tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021304547.8U CN213116212U (en) | 2020-07-06 | 2020-07-06 | Damping-adjustable rotary well washing tool |
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| CN213116212U true CN213116212U (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230088389A1 (en) * | 2020-02-25 | 2023-03-23 | Wright's Well Control Services, Llc | Wash Tool |
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2020
- 2020-07-06 CN CN202021304547.8U patent/CN213116212U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230088389A1 (en) * | 2020-02-25 | 2023-03-23 | Wright's Well Control Services, Llc | Wash Tool |
| US11814930B2 (en) * | 2020-02-25 | 2023-11-14 | Wright's Ip Holdings, Llc | Wash tool |
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