CN212389297U - Automatic reversible bidirectional water hole grinding shoe - Google Patents
Automatic reversible bidirectional water hole grinding shoe Download PDFInfo
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- CN212389297U CN212389297U CN202020997397.7U CN202020997397U CN212389297U CN 212389297 U CN212389297 U CN 212389297U CN 202020997397 U CN202020997397 U CN 202020997397U CN 212389297 U CN212389297 U CN 212389297U
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Abstract
The utility model provides an automatic two-way water hole junk mill that can commutate, the water hole junk mill includes top connection, junk mill body and sets up the switching-over case subassembly in junk mill body inside. The upper joint has an upper end connected with the upstream component, a lower end connected with the milling shoe body, and a through hole for passing the fluid; the milling shoe body is columnar and is provided with an upper end part connected with the lower end part of the upper joint, a lower end part provided with a drilling and milling surface, a first deep hole arranged along the axial direction, a reverse water hole for enabling the milling shoe to generate forward dragging force, a forward water hole for cooling the drilling and milling surface and transporting drill cuttings, and a first runner groove arranged on the outer wall of the milling shoe body; the reversing valve core assembly is arranged in the first deep hole and can enable fluid to be sprayed out of the forward water hole or the reverse water hole according to the fluid flow adjusting passage, and automatic reversing is achieved. The utility model has the advantages of can realize the conversion of mill shoe fluid jet direction, set up the flow value of conversion etc.
Description
Technical Field
The utility model relates to an oil gas field borehole operation equips technical field, particularly, relates to an automatic two-way water hole junk mill that can commutate.
Background
The outlet direction of a water hole of a conventional grinding shoe usually faces to a drilling and milling surface, construction fluid is sprayed to the drilling and milling surface through the water hole in the grinding and milling process to reduce the temperature and transport drill cuttings, and the design of the direction of the water hole is called as a forward water hole; however, the problem that the coiled tubing is difficult to run in horizontal well construction often occurs, in order to improve the running depth of the coiled tubing, the outlet direction of the mill shoe water hole is designed to be away from the drill grinding surface, and during construction, the mill shoe water hole sprays backward fluid to enable the mill shoe to generate forward dragging force, so that the running depth of the coiled tubing is improved, and the direction of the water hole is designed to be reverse water hole; however, the reverse water hole has a problem that the cooling of the drilling surface and the ability to transfer drill cuttings are insufficient when a target object is milled, thereby reducing the overall construction efficiency.
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, the present invention aims to provide a bidirectional water hole milling shoe having a forward water hole and a reverse water hole and capable of switching between the forward water hole and the reverse water hole.
In order to realize the purpose, the utility model provides an automatic reversible bidirectional water hole milling shoe. The water hole milling shoe comprises an upper connector, a milling shoe body and a reversing valve core assembly arranged in the milling shoe body, wherein the upper connector is provided with an upper end part connected with an upstream part of the water hole milling shoe, a lower end part connected with the milling shoe body and a through hole for fluid to pass through; the milling shoe body is columnar, is provided with an upper end part connected with the lower end part of the upper joint, a lower end part provided with a drilling and milling surface, a first deep hole arranged along the axial direction, a reverse water hole for enabling the milling shoe to generate forward dragging force, and a forward water hole for cooling the drilling and milling surface and transporting drill cuttings, and is also provided with a first runner groove arranged on the outer wall of the milling shoe body; the reversing valve core assembly is arranged in the first deep hole and comprises a throttle valve plate, a valve plate clamp spring, a valve core, an elastic part, a valve seat cover, a reverse valve seat, a first water hole ring, a forward valve seat, a second water hole ring and a valve core base, wherein the elastic part, the valve seat cover, the reverse valve seat, the first water hole ring, the forward valve seat, the second water hole ring and the valve core base are sequentially sleeved on the valve core from top to bottom; one end of the elastic piece acts on the second step, and the other end of the elastic piece acts on the valve seat cover; the inner wall of the valve seat cover is in sealing contact with the outer wall of the valve core, the outer wall of the valve seat cover is in sealing contact with the inner wall of the first deep hole, and the lower end of the valve seat cover is provided with a bulge structure; the reverse valve seat is of a cylindrical structure, the inner wall of the reverse valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the reverse valve seat is in sealing contact with the inner wall of a first deep hole of the milling shoe body, and grooves for inserting the protruding structure of the valve seat cover and the upper end of the first water hole ring are formed in the upper end and the lower end of the reverse valve seat respectively; the forward valve seat is of a cylindrical structure, the inner wall of the forward valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the forward valve seat is in sealing contact with the inner wall of a first deep hole of the milling shoe body, and grooves for inserting the lower end of the first water hole ring and the upper end of the second water hole ring are formed in the upper end and the lower end of the forward valve seat respectively; a first cavity is formed among the reverse valve seat, the forward valve seat, the valve core and the milling shoe body, and the reverse water hole communicates the first cavity with the outside of the milling shoe body so that fluid in the first cavity is sprayed out from the reverse water hole; the first water hole ring is arranged in the first cavity, and a third through hole for fluid to pass through is formed in the first water hole ring along the radial direction; a second cavity is formed among the forward valve seat, the valve core base, the valve core and the mill shoe body, and the second cavity is communicated with a second deep hole through a second through hole; the second water eye ring is arranged in the second cavity, and a fourth through hole for fluid to pass through is formed in the second water eye ring along the radial direction; the valve core base is of a cylindrical structure, a groove for inserting the lower end of the second water hole ring is formed in the upper end of the valve core base, the inner wall of the valve core base is in sealing contact with the outer wall of the valve core, the outer wall of the valve core base is in contact with the inner wall of the first deep hole of the mill shoe body, and a second flow channel groove for allowing fluid to pass through is formed in the outer wall of the valve core base along the axial direction; a third cavity is formed among the valve core base, the mill shoe body and the valve core, and the second flow channel groove is used for communicating the third cavity with the second cavity; the forward water hole is communicated with the third cavity, so that the fluid in the third cavity is sprayed out of the forward water hole; the throttle valve plate is arranged on the third step of the valve core, a throttle hole for fluid to pass through is arranged on the throttle valve plate, the throttle valve plate can generate thrust when the fluid passes through the throttle hole, so that the valve core compresses the elastic part and moves downwards along the axial direction, the second through hole is sealed by the inner wall of the valve core base, the first through hole is communicated with the first cavity, and the fluid in the second deep hole enters the first cavity; the valve plate clamp spring is arranged in a groove on a third step of the valve core opening to fix the throttle valve plate and the valve core.
In an exemplary embodiment of the present invention, the water hole milling shoe may further include a first sealing pad, a second sealing pad, a third sealing pad, a fourth sealing pad, and a fifth sealing pad, wherein the first sealing pad is disposed between the valve seat cover and the reverse valve seat, the second sealing pad is disposed between the reverse valve seat and the first water hole ring, the third sealing pad is disposed between the first water hole ring and the forward valve seat, the fourth sealing pad is disposed between the forward valve seat and the second water hole ring, and the fifth sealing pad is disposed between the second water hole ring and the valve core base.
In an exemplary embodiment of the present invention, the water hole milling shoe may further include a first seal ring and a second seal ring, wherein the first seal ring is disposed between the reverse valve seat outer wall and the milling shoe body inner wall, and the second seal ring is disposed between the forward valve seat outer wall and the milling shoe body inner wall.
In an exemplary embodiment of the present invention, the distance between the reversed water hole and the central axis of the milling shoe body is gradually decreased in the up-down direction.
In an exemplary embodiment of the present invention, the distance between the forward eyelet and the central axis of the milling shoe body gradually increases in the up-down direction.
In an exemplary embodiment of the present invention, the aperture of the throttle hole on the throttle plate can be adjusted.
In an exemplary embodiment of the present invention, the positions of the first and second through holes on the valve element can be adjusted to achieve port jet steering under relatively large displacement fluid conditions.
In an exemplary embodiment of the present invention, the first through hole and the second through hole may include 4 to 8 through holes, and the third through hole and the fourth through hole may include 4 to 8 through holes.
In an exemplary embodiment of the present invention, the diamond grinding surface may be formed by insert welding of cemented carbide, and a third flow channel groove is provided on the diamond grinding surface, and the third flow channel groove corresponds to the first flow channel groove provided on the outer wall of the mill shoe body.
Compared with the prior art, the beneficial effects of the utility model can include at least one item in following content:
(1) when the device works, the mutual conversion of the forward water hole and the reverse water hole of the bottom hole grinding shoe can be realized only by changing the discharge capacity of the ground pump injection fluid;
(2) the setting of the pump injection displacement required by the water hole conversion can be realized by replacing throttle plates with different apertures or replacing springs with different stiffness coefficients;
(3) the valve core with different radial hole positions can be replaced to realize the arrangement that the fluid is sprayed to a forward water hole or a reverse water hole under the condition of relatively large discharge.
Drawings
FIG. 1 shows a schematic structural view of an automatically reversible, bi-directional, water-jet mill shoe according to an exemplary embodiment of the present invention;
FIG. 2 shows the assembly view of FIG. 1;
FIG. 3 shows a half-section assembly view of FIG. 1;
fig. 4 shows a schematic perspective view of an automatically reversible bidirectional hookeye grind shoe according to an exemplary embodiment of the present invention.
The reference numerals are explained below:
1-a grinding shoe body, 2-a valve core base, 3-a fifth sealing gasket, 4-a second water hole ring, 5-a fourth sealing gasket, 6-a forward valve seat, 7-a second sealing gasket, 8-a third sealing gasket, 9-a first water hole ring, 10-a second sealing gasket, 11-a reverse valve seat, 12-a first sealing gasket, 13-a first sealing gasket, 14-a valve seat cover, 15-an elastic part, 16-a valve core, 17-a throttling valve plate, 18-a valve plate clamp spring and 19-an upper joint.
Detailed Description
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and exemplary embodiments.
Fig. 1 shows a schematic structural view of an automatic reversible bidirectional water-jet mill shoe according to an exemplary embodiment of the present invention. Fig. 2 shows the assembly of fig. 1. Fig. 3 shows the half-section assembly view of fig. 1.
In an exemplary embodiment of the present invention, an automatic reversible bidirectional hydrophthalmia milling shoe can include an upper joint, a milling shoe body, and a reversing valve cartridge assembly disposed inside the milling shoe body. Wherein, the upper joint is provided with an upper end part connected with the upstream part of the hydrophthalmia milling shoe, a lower end part connected with the milling shoe body and a through hole for passing the fluid. The milling shoe body is columnar, the columnar milling shoe body is provided with an upper end part connected with the lower end part of the upper joint, a lower end part provided with a drilling and milling surface, a first deep hole arranged along the axial direction, a reverse water hole enabling the milling shoe to generate forward dragging force, and a forward water hole for cooling the drilling and milling surface and transporting drill cuttings, and the milling shoe body is further provided with a first runner groove arranged on the outer wall of the milling shoe body. Specifically, as shown in fig. 1 to 3, the upper end of the upper joint 19 is fixedly connected to an upstream member (e.g., a screw motor) of the waterstone milling shoe, and the lower end of the upper joint 19 is fixedly connected to the upper end of the milling shoe body 1, so that the torque of the upstream member is transmitted to the milling shoe body 1, and the waterstone milling shoe can rotate together with the upstream member, thereby performing the milling operation. For example, the upper joint 19 may be provided with threads on its upper and lower ends, by which the upper joint is fixedly connected with the upstream member and the shoe body 1. However, the present invention is not limited thereto, and the upper joint and the upper member of the shoe mill, and the upper joint and the shoe mill body may be fixedly connected by other means. The upper fitting 19 is also provided with a through-going bore along its central axis through which fluid (e.g. circulating liquid) from the upstream component can pass into the shoe body 1.
The skate body 1 can include a first cylindrical section and a second cylindrical section that are fixedly connected, and the diameter of the first cylindrical section is smaller than the diameter of the second cylindrical section. The first deep hole is formed in the shoe grinding body 1 along the central axis of the shoe grinding body, the first deep hole penetrates through the first cylindrical section and enters the second cylindrical section, and the bottom of the first deep hole can be conical in forward arrangement. And a first flow channel groove is arranged on the second cylindrical section along the axial direction and is used for discharging drill cuttings and fluid generated during the drilling and grinding of the grinding shoe to the ground. Here, the first flow path groove may include a plurality of concave arc-shaped flow paths which are uniformly distributed on an outer wall thereof in an axial direction of the second cylinder. For example, as shown in fig. 4, 4 concave arc-shaped flow passages are uniformly distributed on the outer wall of the second cylinder. The reverse water hole is arranged at the junction of the first cylindrical section and the second cylindrical section, one end of the reverse water hole is communicated with the first deep hole, and the other end of the reverse water hole is communicated with the first runner groove. The distance between the reversed water holes and the central axis of the milling shoe body 1 is gradually reduced along the upper-to-lower direction. For example, the angle between the reverse water hole and the central axis of the shoe-milling body 1 can be 30-60 degrees. When fluid is ejected from the opposing port of the mill shoe, the port mill shoe creates a forward (i.e., downward in FIG. 1) drag force, increasing the depth of the coiled tubing run.
The drilling and grinding surface is of a round cake-like structure, the lower end face of the second cylinder is fixedly connected with the upper end face of the cake body, and therefore the drilling and grinding surface is driven by the mill shoe body 1 to rotate, and a target object to be drilled and ground is drilled and ground. The diamond grinding surface can be formed by welding and inlaying hard alloy, and is provided with third flow channel grooves which are in one-to-one correspondence with the first flow channel grooves arranged on the outer wall of the grinding shoe body 1. Here, the third flow channel groove may include a plurality of V-shaped flow channels uniformly distributed on the circumference of the burr cake body. For example, as shown in fig. 4, 4V-shaped flow channels are uniformly distributed on the circumference of the drilling and grinding surface, and the V-shaped flow channels correspond to the concave arc-shaped flow channels on the second cylinder of the shoe grinding body 1 one by one. However, the utility model is not limited to this, bore the mill face and also can be other structures as long as can with the milling shoe body fixed connection and treat under the milling shoe body drives and bore the mill target object and grind can.
The forward water hole is arranged at the bottom of the second cylinder, one end of the forward water hole is communicated with the bottom of the first deep hole, and the other end of the forward water hole is communicated with the third flow channel groove on the drilling and grinding surface. The distance between the positive direction water holes and the central axis of the mill body 1 is gradually increased along the upper-lower direction. For example, the included angle between the positive water holes and the central axis of the mill shoe body 1 is 30-60 degrees. During the drilling operation, fluid is injected through the forward port to the wear surface for reducing the temperature of the wear surface and for transporting the resulting drill cuttings.
In this embodiment, the reversing valve core assembly is disposed in the first deep hole, and the reversing valve core assembly includes a throttle plate, a plate clamp spring, a valve core, and an elastic member, a valve seat cover, a reverse valve seat, a first water hole ring, a forward valve seat, a second water hole ring, and a valve core base, which are sequentially sleeved on the valve core from top to bottom. The valve core is of a cylinder-like structure, the upper section of the outer wall of the valve core is provided with a first step which is in contact with the inner wall of the first deep hole and limits the valve core to move upwards in the first deep hole, a second step which limits the valve core to move downwards in the first deep hole, the valve core is further provided with a second deep hole which is arranged along the axis, a third step which is arranged at the inlet of the second deep hole, a clamping groove which is arranged on the third step, and a first through hole and a second through hole which are arranged along the radial direction of the valve core. Specifically, the valve core 16 is overlapped with the central axis of the mill shoe body 1, and the valve core 16 comprises a third cylindrical section, a fourth cylindrical section and a fifth cylindrical section which are sequentially connected from top to bottom. The outer diameter of the third cylindrical section is matched with the inner diameter of the first deep hole, the outer diameter of the fourth cylindrical section is smaller than that of the third cylindrical section, and the outer diameter of the fifth cylindrical section is smaller than that of the fourth cylindrical section, so that a first step and a second step are formed on the outer wall of the valve core 16. The upper end of the first cylindrical section is in contact with the lower end face of the upper joint 19 so as to limit the position of the valve core 16 moving upwards in the first deep hole, and the outer wall of the first cylindrical section is in contact with the inner wall of the first deep hole so as to prevent the valve core 16 from shaking. The lower end face of the second cylindrical section is used for contacting with the upper end face of the valve seat cover 14 when the valve core 16 moves downwards in the first deep hole, so that the position of the valve core 16 moving downwards in the first deep hole is limited. The second deep hole penetrates through the third cylindrical section and the fourth cylindrical section and enters the fifth cylindrical section. And a first through hole and a second through hole which are used for communicating the second deep hole with the outside of the valve core 16 are arranged on the fifth cylindrical section along the radial direction. The first and second through holes may include a plurality of through holes that are uniformly provided in the circumferential direction of the spool 16. For example, the first and second through holes may include 4 to 8 through holes. In addition, the outer diameter of the opening of the second deep hole is larger than that of other places, so that a third step for placing the throttle valve plate 8 is formed at the opening of the second deep hole, and a groove is formed in the upper end part of the opening of the second deep hole along the circumferential direction.
One end of the elastic piece acts on the second step (namely the lower end face of the third cylindrical section), and the other end of the elastic piece acts on the valve seat cover. The inner wall of the valve seat cover is in sealing contact with the outer wall of the valve core cylinder, the outer wall of the valve seat cover is in sealing contact with the inner wall of the first deep hole, and the lower end of the valve seat cover is provided with a protruding structure. Specifically, the outer wall of the seat cover 14 is in contact with the inner wall of the first deep hole, and the inner wall of the seat cover 14 is in contact with the outer wall of the valve element 16, so that a cavity is formed between the shoe body 1, the valve element 16 and the seat cover 14. The elastic piece 15 is located in the cavity and sleeved on the outer wall of the valve core 16, one end of the elastic piece 15 acts on the second step, the other end of the elastic piece 15 acts on the upper end face of the valve seat cover 14, and the valve core 16 moves up and down along the direction of the central axis of the mill shoe body 1 in the first deep hole along with the compression of the elastic piece 15. The lower end of the valve seat cover 14 is also provided with a convex structure. For example, the elastic member 15 may be a spring, however, the present invention is not limited thereto, and other elastic members having the same function may be used. Here, grooves are also provided on the outer wall of the third cylindrical section so that the volume of the cavity formed between the skate body 1, the valve element 16, and the valve seat cover 14 can be varied.
The reverse valve seat is of a cylindrical structure, the inner wall of the reverse valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the reverse valve seat is in sealing contact with the inner wall of the first deep hole of the milling shoe body, and grooves for inserting the protruding structure of the valve seat cover and the upper end of the first water hole ring are formed in the upper end and the lower end of the reverse valve seat respectively. The forward valve seat is of a cylindrical structure, the inner wall of the forward valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the forward valve seat is in sealing contact with the inner wall of the first deep hole of the milling shoe body, and grooves for inserting the lower end of the first water hole ring and the upper end of the second water hole ring are formed in the upper end and the lower end of the forward valve seat respectively. A first cavity is formed among the reverse valve seat, the forward valve seat, the valve core and the milling shoe body, and the reverse water hole communicates the first cavity with the outside of the milling shoe body so that fluid in the first cavity can be sprayed out from the reverse water hole. The first water hole ring is arranged in the first cavity, and third through holes for fluid to pass through are radially formed in the first water hole ring. And a second cavity is formed among the forward valve seat, the valve core base, the valve core and the mill shoe body, and the second cavity is communicated with the second deep hole through the second through hole. The second water hole ring is arranged in the second cavity, and a fourth through hole for fluid to pass through is radially arranged on the second water hole ring. Specifically, as shown in fig. 1, the first cavity is a circular ring-shaped cavity, the first water hole ring 4 divides the first cavity into a first inner cavity and a first outer cavity, and the first inner cavity and the first outer cavity are communicated through a fourth through hole. The second cavity is a circular ring-shaped cavity, the second water eye ring 9 divides the second cavity into a second inner cavity and a second outer cavity, and the second inner cavity is communicated with the second outer ring through a third through hole. The reverse valve seat 11 and the forward valve seat 6 mainly play a role in installing and fixing the first water hole ring 4 and the second water hole ring 9. Meanwhile, the inner walls of the reverse valve seat 11 and the forward valve seat 6 contact the outer wall of the spool 16 to close the first through hole or the second through hole.
The valve core base is of a cylindrical structure, a groove for inserting the lower end of the second water hole ring is formed in the upper end of the valve core base, the inner wall of the valve core base is in sealing contact with the outer wall of the valve core, the outer wall of the valve core base is in contact with the inner wall of the first deep hole of the mill shoe body, and a second flow channel groove for allowing fluid to pass through is formed in the outer wall of the valve core base along the axial direction. And a third cavity is formed among the valve core base, the mill shoe body and the valve core, and the third cavity is communicated with the second cavity through the second flow channel groove. The forward water hole is communicated with the third cavity, so that the fluid in the third cavity is sprayed out of the forward water hole.
The throttle valve plate is arranged on the third step of the valve core, a throttle hole for fluid to pass through is formed in the throttle valve plate, the throttle valve plate can generate thrust when the fluid passes through the throttle hole, the valve core compresses the elastic piece and moves downwards along the axial direction, therefore, the second through hole is sealed by the inner wall of the valve core base, the first through hole is communicated with the first cavity, and the fluid in the second deep hole enters the first cavity. The valve plate clamp spring is arranged in a groove on a third step of the valve core opening to fix the throttle valve plate and the valve core. Here, the orifice diameter of the orifice in the throttle plate 8 can be adjusted. The coefficient of stiffness of the elastic element 15 can be adjusted, so as to adjust the displacement of the fluid to be pumped for the downward movement of the push valve core 16. Further, the positions of the first and second through holes on the spool 16 can be adjusted to achieve port jet steering with relatively large displacement fluid. The third through hole and the fourth through hole may include a plurality of through holes uniformly arranged in the circumferential direction of the first water hole ring 9 and the second water hole ring 4. For example, the third through hole and the fourth through hole may include 4 to 8 through holes. During operation, the construction fluid that the ground pump was annotated passes through coiled tubing and other tool strings and gets into the utility model discloses an among the water hole junk mill, construction fluid passes through behind the through-hole that runs through of top connection, the orifice on throttle valve block 18 produces thrust and acts on case 16, when the flow that the pump was annotated is less than can compress the required flow of elastic component 15, the fluid is not enough to overcome elastic component 15's elasticity through the thrust that throttle valve block 8 produced, construction fluid is in proper order through the second deep hole, the second through-hole, the second inner chamber, the fourth through-hole, the second exocoel, the second runner groove, from forward water hole blowout behind the third cavity. Along with the increase of the discharge capacity of the construction fluid, the thrust generated by the fluid through the throttle valve plate 8 can overcome the elastic force of the elastic piece 15, the valve core 16 is pushed to move downwards to enable the second through hole to be sealed by the inner part of the valve core base, the first through hole is communicated with the first inner cavity, and the construction fluid is sprayed out from the reverse water hole after sequentially passing through the second deep hole, the first through hole, the first inner cavity, the third through hole and the first outer cavity, so that the spraying direction of the construction fluid is changed. The setting of the pump injection displacement required by the water hole conversion can be realized by replacing the throttle valve sheet 18 with different apertures or replacing the elastic piece 15 with different stiffness coefficients. The arrangement of forward or reverse port injection of fluid at relatively large displacement can be achieved by replacing the spool 16 with different radial port positions.
In another exemplary embodiment of the present invention, the water hole milling shoe may further include a first sealing gasket 13, a second sealing gasket 10, a third sealing gasket 8, a fourth sealing gasket 5, and a fifth sealing gasket 3 on the basis of the above exemplary embodiment. The first sealing gasket 13 is arranged between the valve seat cover 14 and the reverse valve seat 11, the second sealing gasket 10 is arranged between the reverse valve seat 11 and the first water hole ring 9, the third sealing gasket 8 is arranged between the first water hole ring 9 and the forward valve seat 6, the fourth sealing gasket 5 is arranged between the forward valve seat 6 and the second water hole ring 4, and the fifth sealing gasket 3 is arranged between the second water hole ring 4 and the valve core base 2. The water hole milling shoe can further comprise a first sealing ring 12 and a second sealing ring 7 on the basis of the above exemplary embodiment, wherein the first sealing ring 12 is arranged between the outer wall of the reverse valve seat 11 and the inner wall of the milling shoe body 1, and the second sealing ring 7 is arranged between the outer wall of the forward valve seat 6 and the inner wall of the milling shoe body 1. Here, by providing the seal gasket and the seal ring, the sealing performance between each component of the water hole grinding shoe can be improved, and thus the switching of the injection water hole can be realized better.
To sum up, the beneficial effects of the utility model can include at least one of following:
(1) the valve core assembly is arranged in the water hole grinding shoe, and the switching of a fluid passage is realized by the thrust force borne by the throttle plate in the valve core assembly under different flow rates and the compression of the elastic part, so that the mutual conversion of a forward water hole and a reverse water hole of the well bottom grinding shoe is realized;
(2) the setting of the pumping displacement required by water hole conversion can be realized by replacing throttle plates with different apertures or replacing springs with different stiffness coefficients, and the setting of the forward water hole injection or the reverse water hole injection of the fluid under the condition of relatively large displacement can be realized by replacing valve cores at different radial hole positions;
(3) the water hole grinding shoe is simple in structure, has the functions of a forward water hole grinding shoe and a reverse water hole grinding shoe, can improve the construction efficiency, and saves the construction cost.
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 automatic reversible bidirectional water eye milling shoe is characterized in that the water eye milling shoe comprises an upper joint, a milling shoe body and a reversing valve core assembly arranged in the milling shoe body, wherein,
the upper joint is provided with an upper end part connected with the upper part of the hydrophthalmia milling shoe, a lower end part connected with the milling shoe body and a through hole for fluid to pass through;
the milling shoe body is columnar, is provided with an upper end part connected with the lower end part of the upper joint, a lower end part provided with a drilling and milling surface, a first deep hole arranged along the axial direction, a reverse water hole for enabling the milling shoe to generate forward dragging force, and a forward water hole for cooling the drilling and milling surface and transporting drill cuttings, and is also provided with a first runner groove arranged on the outer wall of the milling shoe body;
the reversing valve core assembly is arranged in the first deep hole and comprises a throttle valve plate, a valve plate clamp spring, a valve core, an elastic part, a valve seat cover, a reverse valve seat, a first water hole ring, a forward valve seat, a second water hole ring and a valve core base, wherein the elastic part, the valve seat cover, the reverse valve seat, the first water hole ring, the forward valve seat, the second water hole ring and the valve core base are sequentially sleeved on the valve core from top to bottom,
the valve core is of a cylinder-like structure, the upper section of the outer wall of the valve core is provided with a first step which is contacted with the inner wall of the first deep hole and limits the valve core to move upwards in the first deep hole, a second step which limits the valve core to move downwards in the first deep hole, the valve core is also provided with a second deep hole arranged along the axis, a third step arranged at the inlet of the second deep hole, a clamping groove arranged on the third step, and a first through hole and a second through hole which are arranged along the radial direction of the valve core;
one end of the elastic piece acts on the second step, and the other end of the elastic piece acts on the valve seat cover;
the inner wall of the valve seat cover is in sealing contact with the outer wall of the valve core, the outer wall of the valve seat cover is in sealing contact with the inner wall of the first deep hole, and the lower end of the valve seat cover is provided with a bulge structure;
the reverse valve seat is of a cylindrical structure, the inner wall of the reverse valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the reverse valve seat is in sealing contact with the inner wall of a first deep hole of the milling shoe body, and grooves for inserting the protruding structure of the valve seat cover and the upper end of the first water hole ring are formed in the upper end and the lower end of the reverse valve seat respectively;
the forward valve seat is of a cylindrical structure, the inner wall of the forward valve seat is in sealing contact with the outer wall of the valve core, the outer wall of the forward valve seat is in sealing contact with the inner wall of a first deep hole of the milling shoe body, and grooves for inserting the lower end of the first water hole ring and the upper end of the second water hole ring are formed in the upper end and the lower end of the forward valve seat respectively;
a first cavity is formed among the reverse valve seat, the forward valve seat, the valve core and the milling shoe body, and the reverse water hole communicates the first cavity with the outside of the milling shoe body so that fluid in the first cavity is sprayed out from the reverse water hole;
the first water hole ring is arranged in the first cavity, and a third through hole for fluid to pass through is formed in the first water hole ring along the radial direction;
a second cavity is formed among the forward valve seat, the valve core base, the valve core and the mill shoe body, and the second cavity is communicated with a second deep hole through a second through hole;
the second water eye ring is arranged in the second cavity, and a fourth through hole for fluid to pass through is formed in the second water eye ring along the radial direction;
the valve core base is of a cylindrical structure, a groove for inserting the lower end of the second water hole ring is formed in the upper end of the valve core base, the inner wall of the valve core base is in sealing contact with the outer wall of the valve core, the outer wall of the valve core base is in contact with the inner wall of the first deep hole of the mill shoe body, and a second flow channel groove for allowing fluid to pass through is formed in the outer wall of the valve core base along the axial direction;
a third cavity is formed among the valve core base, the mill shoe body and the valve core, and the second flow channel groove is used for communicating the third cavity with the second cavity;
the forward water hole is communicated with the third cavity, so that the fluid in the third cavity is sprayed out of the forward water hole;
the throttle valve plate is arranged on the third step of the valve core, a throttle hole for fluid to pass through is arranged on the throttle valve plate, the throttle valve plate can generate thrust when the fluid passes through the throttle hole, so that the valve core compresses the elastic part and moves downwards along the axial direction, the second through hole is sealed by the inner wall of the valve core base, the first through hole is communicated with the first cavity, and the fluid in the second deep hole enters the first cavity;
the valve plate clamp spring is arranged in a groove on a third step of the valve core opening to fix the throttle valve plate and the valve core.
2. The automatic reversible, bi-directional grommets of claim 1, further comprising a first seal, a second seal, a third seal, a fourth seal, and a fifth seal, wherein the first seal is disposed between the valve seat cover and the reverse valve seat, the second seal is disposed between the reverse valve seat and the first grommets, the third seal is disposed between the first grommets and the forward valve seat, the fourth seal is disposed between the forward valve seat and the second grommets, and the fifth seal is disposed between the second grommets and the valve cartridge base.
3. The automatically reversible, bi-directional, watersole mill shoe of claim 1, further comprising a first seal ring and a second seal ring, wherein the first seal ring is disposed between the outer wall of the reverse valve seat and the inner wall of the mill shoe body, and the second seal ring is disposed between the outer wall of the forward valve seat and the inner wall of the mill shoe body.
4. The automatically reversible, bi-directional, water-jet mill shoe according to claim 1, characterized in that the distance between the reversed water-jet and the central axis of the mill body decreases gradually in the up-down direction.
5. The automatically reversible, bi-directional shoe mill according to claim 1, characterized in that the distance between the forward eyelet and the central axis of the mill body increases gradually in the up-down direction.
6. The automatically reversible, bi-directional shoe mill according to claim 1, wherein the orifice size of the orifice on the throttle plate is adjustable.
7. The automatically reversible, bi-directional shoe mill according to claim 1, wherein the position of the first and second through holes in the valve core are adjustable to achieve a jet steering in relatively high volume fluid.
8. The automatically reversible, bi-directional, water-jet mill shoe according to claim 1, wherein said first and second through-holes comprise 4-8 through-holes and said third and fourth through-holes comprise 4-8 through-holes.
9. The automatic reversible bidirectional water-hole grind shoe according to claim 1, wherein the drill grind surface is formed by insert welding of cemented carbide, and third flow channel grooves are formed in the drill grind surface and correspond to the first flow channel grooves formed in the outer wall of the grind shoe body one to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020997397.7U CN212389297U (en) | 2020-06-03 | 2020-06-03 | Automatic reversible bidirectional water hole grinding shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020997397.7U CN212389297U (en) | 2020-06-03 | 2020-06-03 | Automatic reversible bidirectional water hole grinding shoe |
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| Publication Number | Publication Date |
|---|---|
| CN212389297U true CN212389297U (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020997397.7U Active CN212389297U (en) | 2020-06-03 | 2020-06-03 | Automatic reversible bidirectional water hole grinding shoe |
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| CN (1) | CN212389297U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485843A (en) * | 2020-06-03 | 2020-08-04 | 中国石油天然气集团有限公司 | Automatic reversible bidirectional water hole grinding shoe |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
-
2020
- 2020-06-03 CN CN202020997397.7U patent/CN212389297U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111485843A (en) * | 2020-06-03 | 2020-08-04 | 中国石油天然气集团有限公司 | Automatic reversible bidirectional water hole grinding shoe |
| CN111485843B (en) * | 2020-06-03 | 2024-04-30 | 中国石油天然气集团有限公司 | Automatic reversing two-way water hole grinding shoes |
| CN115613990A (en) * | 2022-12-15 | 2023-01-17 | 中国石油集团川庆钻探工程有限公司 | Full-switching reversible water hole grinding shoe |
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