CN217538649U - Metal sealing dissoluble bridge plug free of ball throwing - Google Patents
Metal sealing dissoluble bridge plug free of ball throwing Download PDFInfo
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- CN217538649U CN217538649U CN202221558469.3U CN202221558469U CN217538649U CN 217538649 U CN217538649 U CN 217538649U CN 202221558469 U CN202221558469 U CN 202221558469U CN 217538649 U CN217538649 U CN 217538649U
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- ball seat
- pull rod
- hole
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Abstract
The utility model discloses a metal sealing dissoluble bridge plug without ball throwing, which comprises a push cylinder, wherein the upper end of the push cylinder is connected with a setting tool through screw threads, and the lower end is arranged in an inner hole at the upper part of a ball seat; the pull rod and the adapter are positioned on the axis, and the adapter, the ball seat and the slips are sequentially sleeved on the pull rod; the conversion joint is arranged in the push cylinder, the upper end of the conversion joint is connected with a setting tool, and the lower end of the conversion joint is positioned in the ball seat and is connected with the pull rod through threads; the lower end of the ball seat is sleeved with the slips; the base is sleeved at the tail part of the pull rod and is connected with the pull rod through threads; the dissolvable ball is located within the lower end of the crossover joint. The utility model discloses saved and dropped into the link of dissoluble ball at the well head, improved the efficiency of construction to the bridge plug sits and seals the back, verifies the setting condition of bridge plug immediately, has improved the reliability of bridge plug construction. The metal sealing ring has wide temperature adaptation range and good sealing effect; the integral slip and the locking structure reduce the components of the tool, shorten the size of the tool and are beneficial to the running of the tool.
Description
Technical Field
The utility model relates to an oil gas field development technical field, concretely relates to exempt from metal seal dissoluble bridging plug of bowling.
Background
At present, soluble rubber is mostly adopted to be processed into sealing materials for the soluble bridge plugs used in the market. The dissoluble rubber material is characterized in that when the temperature of an oil well is high, the rubber strength is quickly lost, the sealing capability is reduced, and meanwhile, the dissoluble capability is reduced, the dissolution time is long or the dissolution is not carried out in a low-temperature state. In addition, the rubber-sealed bridge plug has a complex structure, a plurality of parts and long size, so that the cost of the tool is increased, and the tool is not favorable for running in.
At present, the bridge plug staged fracturing adopts perforation and bridge plug setting combined technology, namely after the bridge plug is set, the cable is lifted and put in to carry out perforation, then a perforation tool and a setting tool are taken out of an oil well, a sealing ball is put in during fracturing to plug a central channel of the bridge plug, and two problems mainly exist: firstly, the ball throwing reduces the operation efficiency and wastes liquid for pumping the ball; the setting condition of the bridge plug cannot be verified.
In addition, the soluble bridge plug sealing parts in the prior art are all made of rubber materials, the application range is limited, the number of structural parts is large, the design has defects, the length is long, the inner diameter is small, and the soluble bridge plug sealing parts are not required to be inserted. Need drop into the central channel of a ball shutoff bridge plug from the well head after the bridge plug sets up to seal, can not verify the setting condition of bridge plug simultaneously, influenced work efficiency and fracturing effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but the sealed dissoluble bridging plug of metal who exempts from to throw the ball to the above-mentioned defect that prior art exists, simple structure, the part is few, and length is short, and is sealed reliable to there are defect and not enough problem in the use of dissoluble bridging plug among the solution prior art.
A metal sealing dissoluble bridge plug without ball throwing comprises a push cylinder, wherein the upper end of the push cylinder is in threaded connection with a setting tool, and the lower end of the push cylinder is arranged in an inner hole in the upper part of a ball seat;
the device also comprises a pull rod and an adapter, wherein the pull rod and the adapter are positioned at the axis, and the adapter, the ball seat and the slips are sequentially sleeved on the pull rod;
the conversion joint is arranged in the push cylinder, the upper end of the conversion joint is connected with a setting tool, and the lower end of the conversion joint is positioned in the ball seat and is connected with the pull rod through threads;
the lower end of the ball seat is sleeved with the slips; the base is sleeved at the tail part of the pull rod and is connected with the pull rod through threads; the dissolvable ball is located within the lower end of the crossover joint.
The push cylinder is of a cylindrical structure and sequentially comprises a large-diameter cylindrical surface at the upper end and a small-diameter cylindrical surface at the lower end, the inner wall of the upper end is provided with a thread connected with a setting tool, the lower end is provided with a notch, and the notch extends from the small-diameter cylindrical surface to the large-diameter cylindrical surface; and two symmetrical counter bores are arranged on the side surface in the direction vertical to the notch, and are provided with threads and are in threaded connection with the guide screws.
The adapter is of a cylindrical structure, the outer cylindrical surface comprises a small cylindrical surface at the lower end and a large cylindrical surface at the upper end, the joint of the small cylindrical surface and the large cylindrical surface is a transition conical surface, two symmetrical planes are cut out from the small cylindrical surface, and a spherical hole is formed in the planes; the soluble ball is arranged in the ball hole of the adapter; two symmetrical guide grooves are arranged on the outer cylindrical surface, the axes of the guide grooves are perpendicular to the axis of the ball hole, and the tail ends of the guide screws are positioned in the guide grooves. The inner wall of the upper end is provided with a thread connected with a setting tool, and the inner wall of the lower end is provided with a thread connected with a pull rod;
the locking device comprises a ball seat and a cylindrical structure, wherein the lower end of the outer surface of the ball seat is a conical surface, and the lower end of the conical surface is provided with a locking conical thread; from the upper end to the lower extreme, the inner chamber of ball seat includes three diameter first hole, second hole, the third hole that diminishes in proper order, is equipped with step and an interior conical surface between first hole and the second hole, is equipped with sealed conical surface between second hole, the third hole. The step is attached to the lower end face of the push cylinder; the inner conical surface is attached to the transition conical surface of the adapter.
The slips are of a cylindrical structure, the inner wall of the upper end of the slips is a conical hole, the lower end of the conical hole is a conical thread, the slips are sleeved on the ball seat, and the conical hole is meshed with the conical surface of the ball seat. A plurality of notches are uniformly and mutually intersected and cut along the axial direction from the upper end surface and the lower end surface of the slip, and a round hole is radially arranged at the tail end of each notch from the outer cylindrical surface.
The metal sealing element is of a cylindrical structure, the inner surface of the metal sealing element is a sealing conical surface, and the metal sealing element is sleeved on the conical surface of the ball seat and is positioned on the end face of the upper end of the slip.
When the bridge plug is set, the pushing cylinder and the ball seat move forwards along the axial direction, and the adapter, the soluble ball, the metal sealing ring, the slip, the base and the pull rod are relatively static along the axial direction. Under the push of the push cylinder and the ball seat, the metal sealing ring and the slips expand radially.
After the metal sealing ring and the slips expand in the radial direction to a certain size, the metal sealing ring and the slips are tightly attached to the inner wall of the sleeve, and the metal sealing ring vertically seals and separates the sleeve. The slips are anchored on the casing and bear the pressure after the upper packing.
When the push cylinder, the conversion joint, the soluble ball and the pull rod are pulled out outwards along the axial direction, the soluble ball slides out of the ball hole.
When fracturing a zone of interest, the dissolvable ball sits on a sealing cone within the ball seat.
The pull rod, the conversion joint, the outer pushing cylinder and the guide screw are made of metal materials, after the bridge plug is seated, the pull rod, the conversion joint, the outer pushing cylinder and the guide screw are lifted out of the oil well, other parts are thrown in the well, and the dissolvable ball is pushed by fracturing fluid and is seated on the conical surface of the ball seat to plug the central passage of the bridge plug and seal a fracturing layer section. The components lost in the well are all made of magnesium-based soluble metal materials, and automatically dissolve after fracturing is completed.
The utility model discloses a neotype shutoff bridge plug center access structure has saved the link that drops into dissoluble ball at the well head after traditional bridge plug seals, has improved the efficiency of construction to bridge plug seals the back, verifies the setting condition of bridge plug immediately, has improved the reliability of bridge plug construction. Meanwhile, the metal sealing ring has wide temperature adaptation range and good sealing effect; the whole slip and the novel locking structure reduce the components of the tool, shorten the size of the tool and are beneficial to the running of the tool.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
fig. 2 is a schematic structural diagram of the present invention;
fig. 3 is a three-dimensional view of the pusher of the present invention;
FIG. 4 is a three-dimensional view of the adapter of the present invention;
figure 5 is a structural view of the ball seat of the present invention
Figure 6 is a three-dimensional view of the slip bowl of the present invention
FIG. 7 is one of the principle views of the bridge plug setting of the present invention
FIG. 8 is a second schematic view of the bridge plug setting of the present invention
Fig. 9 is a schematic view of the ball seating of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the preferred embodiments are only for the purpose of illustrating and explaining the present invention and are not intended to limit the present invention.
As shown in figures 1 and 2, the metal sealing dissolvable bridge plug free of ball throwing comprises a push cylinder 1, wherein the upper end of the push cylinder 1 is in threaded connection with a setting tool, and the lower end of the push cylinder 1 is arranged in an inner hole in the upper part of a ball seat 4;
the device also comprises a pull rod 7 and an adapter 2, wherein the pull rod 7 and the adapter 2 are positioned at the axis, and the adapter 2, the ball seat 4 and the slip 6 are sequentially sleeved on the pull rod 7;
the conversion joint 2 is arranged in the push cylinder 1, the upper end of the conversion joint 2 is connected with a setting tool, and the lower end of the conversion joint is positioned in the ball seat 4 and is connected with the pull rod 7 through threads;
the lower end of the ball seat 4 is sleeved with a slip 6; the base 8 is sleeved on the tail part of the pull rod 7 and is connected with the pull rod through threads; the dissolvable ball 3 is positioned in the lower end of the adapter 2;
as shown in fig. 3, the push tube 1 is a cylindrical structure, and sequentially comprises a large-diameter cylindrical surface 14 at the upper end and a small-diameter cylindrical surface 15 at the lower end, the inner wall of the upper end is provided with a thread connected with a setting tool, the lower end is provided with a notch 11, the width of the notch 11 is 30-50mm, and the length of the notch is 50-160mm; the notch 11 extends from the small diameter cylindrical surface 15 to the large diameter cylindrical surface 14; two symmetrical counterbores 12 are formed in the side surface perpendicular to the notch 11, and the counterbores 12 are provided with threads and are in threaded connection with a guide screw 19.
As shown in fig. 4, the adapter 2 is a cylindrical structure, the outer cylindrical surface includes a small cylindrical surface 21 at the lower end and a large cylindrical surface 22 at the upper end, the joint between the small cylindrical surface 21 and the large cylindrical surface 22 is a transition conical surface 23, two symmetrical planes 24 are cut from the small cylindrical surface 21, and a spherical hole 25 is formed in the plane 24; the soluble ball 3 is arranged in the ball hole 25 of the adapter 2; two symmetrical guide grooves 26 are arranged on the outer cylindrical surface, the axes of the guide grooves 26 are perpendicular to the axis of the ball hole 25, and the tail end of the guide screw 19 is positioned in the guide grooves 26. The inner wall of the upper end is provided with a thread connected with a setting tool, and the inner wall of the lower end is provided with a thread connected with a pull rod 7;
as shown in fig. 5, the ball seat 4 is of a cylindrical structure, the lower end of the outer surface of the ball seat 4 is a conical surface 41, and the lower end of the conical surface 41 is provided with a locking conical thread 42 with the length of 10-40 mm; from the upper end to the lower end, the inner cavity of the ball seat 4 comprises a first inner hole 43, a second inner hole 44 and a third inner hole 45 with gradually reduced diameters, a step 46 and an inner conical surface 47 are arranged between the first inner hole 43 and the second inner hole 44, and a sealing conical surface 48 is arranged between the second inner hole 44 and the third inner hole 45. The step 46 is attached to the lower end face of the push cylinder 1; the inner tapered surface 47 abuts the transition tapered surface 23 of the adapter 2.
As shown in FIG. 6, the slip 6 has a cylindrical structure, the inner wall of the upper end is a conical hole 61, the lower end of the conical hole 61 is a conical thread 62, the slip 6 is sleeved on the ball seat 4, and the conical hole 61 is engaged with the conical surface 41 of the ball seat 4. A plurality of cuts 63 are evenly and mutually intersected and cut along the axial direction from the upper end face and the lower end face of the slip 6, each cut 63 is 5-10mm away from the end face, and a round hole 64 is radially arranged at the tail end of each cut 63 from the outer cylindrical surface.
The metal sealing element 5 is a cylindrical structure, the inner surface of which is a sealing conical surface 51, is sleeved on the conical surface 41 of the ball seat 4 and is positioned at the upper end surface of the slip 6.
As shown in fig. 7, in one of the bridge plug setting principle diagrams according to the present invention, the metal seal ring 5 is expanded outward to the inner wall of the casing 50, the slips 6 are expanded outward to the inner wall of the casing 50,
as shown in fig. 8, the second principle diagram of bridge plug setting according to the present invention is that after the bridge plug is set, when the pushing cylinder 1, the adapter 2, the soluble ball 3 and the pull rod 7 are pulled out axially, the soluble ball 3 slides out from the ball hole 25.
As shown in fig. 9, the seat schematic diagram of the soluble ball is lifted up by the seat sealing tool, liquid is pumped into the shaft, the soluble ball 3 enters the center hole of the bridge plug along with the liquid, and the soluble ball 3 falls on the sealing conical surface 48 of the ball seat 4 to seal the center passage of the bridge plug.
Claims (6)
1. The metal sealing dissoluble bridge plug free of ball throwing is characterized by comprising a push cylinder (1), wherein the upper end of the push cylinder (1) is in threaded connection with a setting tool, and the lower end of the push cylinder is arranged in an inner hole in the upper part of a ball seat (4);
the ball seat is characterized by further comprising a pull rod (7) and an adapter (2), wherein the pull rod (7) and the adapter (2) are located at the axis, and the adapter (2), the ball seat (4) and the slips (6) are sequentially sleeved on the pull rod (7);
the conversion joint (2) is arranged in the push cylinder (1), the upper end of the conversion joint (2) is connected with a setting tool, and the lower end of the conversion joint is positioned in the ball seat (4) and is connected with the pull rod (7) through threads;
the lower end of the ball seat (4) is sleeved with the slips (6); the base (8) is sleeved at the tail part of the pull rod (7) and is connected with the pull rod through threads; the soluble ball (3) is positioned in the lower end of the adapter (2).
2. The pitching-free metal-sealed dissolvable bridge plug according to claim 1, wherein the push sleeve (1) is of a cylindrical structure and sequentially comprises a large-diameter cylindrical surface (14) at an upper end and a small-diameter cylindrical surface (15) at a lower end, the inner wall of the upper end is provided with threads connected with a setting tool, the lower end is provided with a notch (11), and the notch (11) extends from the small-diameter cylindrical surface (15) to the large-diameter cylindrical surface (14); two symmetrical counter bores (12) are formed in the side face in the direction perpendicular to the notch (11), and threads are arranged on the counter bores (12) and are in threaded connection with the guide screws (19).
3. The pitching-free metal-sealed dissolvable bridge plug as claimed in claim 2, wherein the adapter (2) is a cylindrical structure, the outer cylindrical surface comprises a small cylindrical surface (21) at the lower end and a large cylindrical surface (22) at the upper end, the junction between the small cylindrical surface (21) and the large cylindrical surface (22) is a transition conical surface (23), two symmetrical planes (24) are cut from the small cylindrical surface (21), and a spherical hole (25) is formed in the plane (24); the soluble ball (3) is arranged in a ball hole (25) of the adapter (2); two symmetrical guide grooves (26) are arranged on the outer cylindrical surface, the axes of the guide grooves (26) are vertical to the axis of the ball hole (25), and the tail end of the guide screw (19) is positioned in the guide grooves (26); the inner wall of the upper end is provided with a thread connected with a setting tool, and the inner wall of the lower end is provided with a thread connected with a pull rod (7).
4. The pitching-free metal-sealed soluble bridge plug as claimed in claim 3, wherein the ball seat (4) is of a cylindrical structure, the lower end of the outer surface of the ball seat (4) is a conical surface (41), and the lower end of the conical surface (41) is provided with a locking conical thread (42); from the upper end to the lower end, the inner cavity of the ball seat (4) sequentially comprises a first inner hole (43), a second inner hole (44) and a third inner hole (45), the diameters of the first inner hole (43), the second inner hole (44) and the third inner hole (45) are gradually reduced, a step (46) and an inner conical surface (47) are arranged between the first inner hole (43) and the second inner hole (44), and a sealing conical surface (48) is arranged between the second inner hole (44) and the third inner hole (45); the step (46) is attached to the lower end face of the push cylinder (1); the inner conical surface (47) is attached to the transition conical surface (23) of the adapter (2).
5. The pitching-free metal-sealed soluble bridge plug as claimed in claim 4, wherein the slips (6) are of a cylindrical structure, the inner wall of the upper end of the slip is a conical hole (61), the lower end of the conical hole (61) is a conical thread (62), the slips (6) are sleeved on the ball seat (4), and the conical hole (61) is meshed with the conical surface (41) of the ball seat (4); a plurality of cuts (63) are evenly and mutually intersected and cut along the axial direction from the upper end surface and the lower end surface of the slip (6), and a round hole (64) is radially arranged at the tail end of each cut (63) from the outer cylindrical surface.
6. The pitching-free metal-sealed dissolvable bridge plug according to claim 5, further comprising a metal seal (5), a cylindrical structure, the inner surface of which is a sealing conical surface (51), which fits over the conical surface (41) of the ball seat (4) and is located at the upper end face of the slip (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221558469.3U CN217538649U (en) | 2022-06-21 | 2022-06-21 | Metal sealing dissoluble bridge plug free of ball throwing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221558469.3U CN217538649U (en) | 2022-06-21 | 2022-06-21 | Metal sealing dissoluble bridge plug free of ball throwing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217538649U true CN217538649U (en) | 2022-10-04 |
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ID=83420326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221558469.3U Active CN217538649U (en) | 2022-06-21 | 2022-06-21 | Metal sealing dissoluble bridge plug free of ball throwing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217538649U (en) |
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2022
- 2022-06-21 CN CN202221558469.3U patent/CN217538649U/en active Active
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