CN211448613U - Self-balancing gas pressure pushing type bridge plug setting tool - Google Patents
Self-balancing gas pressure pushing type bridge plug setting tool Download PDFInfo
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- CN211448613U CN211448613U CN201921988832.3U CN201921988832U CN211448613U CN 211448613 U CN211448613 U CN 211448613U CN 201921988832 U CN201921988832 U CN 201921988832U CN 211448613 U CN211448613 U CN 211448613U
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Abstract
The utility model discloses a self-balancing gas pressure push type bridge plug setting tool, which comprises a core bar, a sliding sleeve and a shell, wherein the core bar is provided with an inner hole for installing a gunpowder column, the core bar is radially provided with an air vent in a through manner, the outer wall of the core bar is provided with an outer step surface for limiting the motion position of the shell, the outer step surface of the core bar is in sealing fit with the inner wall of the shell, the outer wall of the lower end of the core bar is provided with a pressure relief groove, and the inner wall of the lower end of the shell is provided; in an initial state, the core bar is fixedly connected with the sliding sleeve, the upper end of the shell is fixedly connected with the sliding sleeve, the inner step surface of the shell is in sealing fit with the outer wall of the core bar, and the vent hole is communicated with an annular space between the inner step surface and the outer step surface; when the bridge plug is in a setting state, the sliding sleeve moves downwards to the position of the outer step surface of the core rod for limiting, the inner step surface of the shell is positioned in the pressure relief groove, and a pressure relief channel is formed by a gap between the inner step surface and the pressure relief groove. The utility model discloses can be used to the high-pressure well, have automatic pressure release and self-balancing function.
Description
Technical Field
The utility model relates to an oil gas field development technical field especially relates to a gas pressure promotes formula bridging plug seat and seals instrument with automatic pressure release and ability balanced well hydrostatic column pressure function for among the bridging plug seat operation.
Background
The bridge plug is widely applied to the aspect of oil and gas well seal, and is a main seal process for plugging a tested layer of a test oil well and performing upward return test oil. The squeeze sealing process of the bridge plug needs to be accomplished by means of a setting tool that transports the bridge plug into the well. The bridge plug setting tool in the prior art is more, for example, a bridge plug setting tool disclosed in chinese patent publication No. 208918507U, published as 2019-05-31, which comprises a pressure relief recoil chamber and a propellant chamber, wherein the pressure relief recoil chamber is hermetically connected with the propellant chamber; a sealing needle for communicating the cable and the pressure relief recoil chamber is arranged at the top of the pressure relief recoil chamber; the middle part of the pressure relief recoil chamber is provided with an upward inclined pressure relief pore passage; a piston body is arranged at the bottom of the pressure relief backflushing chamber; the opening end of the piston body is upward and is fixed on the inner side wall of the pressure relief recoil chamber through the fixing piece, the piston body and the inner side wall of the pressure relief recoil chamber are matched to seal a pressure relief pore passage under a normal state, and when the ignition device works, the fixing piece is cut off by means of pressure generated by the explosive chamber, so that the piston body moves upwards to expose the pressure relief pore passage and perform pressure relief recoil.
However, the existing common bridge plug setting tool is not reasonable enough in structural design, the tool is always subjected to the reverse acting force generated by the liquid pressure in the well in the process of extruding the bridge plug, and the pressure generated by the combustion of gunpowder can extrude the bridge plug to move after overcoming the reverse acting force of the pressure in the well. Because the well condition parameters such as setting depth, well pressure and the like of each well are different, the reaction force of well fluid is also different, so that the consistency of actual output of the setting force is influenced, and particularly when the reaction force is overlarge, half setting of a bridge plug can be caused. The gas pressure is remained in the tool, and the tool needs manual pressure relief and is dangerous. And the tool is heavy, needs many people to work in coordination, and the maintenance cycle is long.
Disclosure of Invention
An object of the utility model is to overcome the above-mentioned problem that prior art exists, provide a self-balancing gas pressure promotes formula bridging plug setting instrument. The utility model discloses can be used to the high-pressure well, have automatic pressure release and self-balancing function.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a self-balancing gas pressure promotes formula bridging plug and sets up instrument which characterized in that: the device comprises a core bar, a sliding sleeve and a shell, wherein the core bar is provided with an inner hole for mounting a gunpowder column, the core bar is radially provided with a vent hole in a through manner, the outer wall of the core bar is provided with an outer step surface for limiting the movement position of the shell, the outer step surface of the core bar is in sealing fit with the inner wall of the shell, the outer wall of the lower end of the core bar is provided with a pressure relief groove, the inner wall of the lower end of the shell is provided with an inner step surface, and the inner step surface of the shell; in an initial state, the core bar is fixedly connected with the sliding sleeve and is in sealing fit with the inner wall of the sliding sleeve, the upper end of the shell is fixedly connected with the sliding sleeve, the inner wall of the shell is in sealing fit with the outer wall of the sliding sleeve, the inner step surface of the shell is in sealing fit with the outer wall of the core bar, and the vent hole is communicated with an annulus between the inner step surface and the outer step surface; when the bridge plug is in a setting state, the sliding sleeve moves downwards to the position of the outer step surface of the core rod for limiting, the inner step surface of the shell is positioned in the pressure relief groove, and a pressure relief channel is formed by a gap between the inner step surface and the pressure relief groove.
The number of the vent holes is 4, and the vent holes are arranged on the same circumference of the core rod.
The sliding sleeve is fixedly connected with the core rod through a shear screw.
The size of the sealing surface between the sliding sleeve and the core rod is consistent with that of the sealing surface between the shell and the core rod.
The sliding sleeve is in sealing fit with the core rod through the O-shaped ring on the inner wall, and is in sealing fit with the shell through the O-shaped ring on the outer wall.
Two O-shaped rings are arranged on the outer step surface of the core rod, and the outer step surface of the core rod is in sealing fit with the inner wall of the shell through the O-shaped rings.
Two O-shaped rings are arranged on the inner step surface of the shell, and the inner step surface of the shell is in sealing fit with the outer wall of the core rod through the O-shaped rings.
The sliding sleeve is fixedly connected with the upper end of the shell through threads.
Adopt the utility model has the advantages of:
1. the utility model is used for oil gas well seat seals bridging plug, because sliding sleeve and casing are the same by the sealed face diameter that well fluid influences, the fluid pressure action is just equal at the sliding sleeve and the holistic ascending and decurrent effort of casing in the well, just no longer receive well fluid pressure's influence during sliding sleeve and casing motion, gunpowder pressure all acts on bridging plug, the seat seals reliable and stable, move to a certain distance when the casing, realize the seat and seal the bridging plug after, gas pressure in the automatic release core bar in the oil gas well, prevent that the artifical pressure release in ground from hurting the people, and non-staining ground environment. The product is light and convenient and can be operated by one person.
2. The utility model discloses sealed face between sliding sleeve and core bar and the sealed face size between casing and core bar are unanimous, can make liquid pressure in the well offset each other with the power of acting on the casing like this, do not receive liquid pressure's in the well influence when making the casing motion, and gunpowder gas pressure acts on the casing completely, guarantees that the operation is stable, reliable.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view after the operation of the present invention;
FIG. 3 is a schematic view of a setting tool work string;
labeled as: 1. the explosive-proof device comprises a core bar, 2, a sliding sleeve, 3, a shell, 4, vent holes, 5, a pressure relief groove, 6, a bridge plug, 7, a shear screw, 8, an O-shaped ring, 9, an explosive column, 10 and an adapter.
Detailed Description
Example 1
A self-balancing gas pressure push type bridge plug setting tool comprises a core rod 1, a sliding sleeve 2 and a shell 3, wherein the core rod 1 is provided with an inner hole for mounting a gunpowder column, vent holes 4 are radially arranged on the core rod 1 in a penetrating manner, the outer wall of the core rod 1 is provided with an outer step surface for limiting the movement position of the shell 3, the outer step surface of the core rod 1 is in sealing fit with the inner wall of the shell 3, the outer wall of the lower end of the core rod 1 is provided with a pressure relief groove 5, the inner wall of the lower end of the shell 3 is provided with an inner step surface, and the inner step surface of the shell 3 is positioned below the; in an initial state, the core bar 1 is fixedly connected with the sliding sleeve 2 and is in sealing fit with the inner wall of the sliding sleeve 2, the upper end of the shell 3 is fixedly connected with the sliding sleeve 2, the inner wall of the shell 3 is in sealing fit with the outer wall of the sliding sleeve 2, the inner step surface of the shell 3 is in sealing fit with the outer wall of the core bar 1, and the vent hole 4 is communicated with an annular space between the inner step surface and the outer step surface; when the bridge plug 6 is in a setting state, the sliding sleeve 2 moves downwards to the position of the outer step surface of the core rod 1 for limiting, the inner step surface of the shell 3 is positioned in the pressure relief groove 5, and a pressure relief channel is formed by a gap between the inner step surface and the pressure relief groove 5.
The number of the vent holes 4 is 4, and the vent holes are arranged on the same circumference of the core rod 1.
The sliding sleeve 2 is fixedly connected with the core bar 1 through a shear screw 7.
The size of the sealing surface between the sliding sleeve 2 and the core bar 1 is consistent with that of the sealing surface between the shell 3 and the core bar 1.
Two O-shaped rings 8 are arranged on the inner wall and the outer wall of the sliding sleeve 2, the sliding sleeve 2 is in sealing fit with the core rod 1 through the O-shaped rings 8 on the inner wall, and is in sealing fit with the shell 3 through the O-shaped rings 8 on the outer wall.
Two O-shaped rings 8 are arranged on the outer step surface of the core rod 1, and the outer step surface of the core rod 1 is in sealing fit with the inner wall of the shell 3 through the O-shaped rings 8.
Two O-shaped rings 8 are arranged on the inner step surface of the shell 3, and the inner step surface of the shell 3 is in sealing fit with the outer wall of the core rod 1 through the O-shaped rings 8.
The sliding sleeve 2 is fixedly connected with the upper end of the shell 3 through threads.
Example 2
The setting tool and the working principle of the present invention will be described in detail with reference to the accompanying drawings and specific examples.
The utility model discloses seat seals the instrument and is arranged in the oil gas well operation for seat seals the bridging plug.
As shown in fig. 1 and 2, the setting tool comprises a shear screw 7, a sliding sleeve 2, a shell 3, a core bar 1 and an O-ring 8.
The core rod 1 is provided with an inner hole for installing a gunpowder column, and is communicated with 4 vent holes 4 on the excircle, and the shell 3 and the core rod 1 can be pushed to move mutually by gas pressure generated by the gunpowder column.
The core rod 1 is provided with a pressure relief groove 5, and when the shell 3 moves to a certain distance, the gas pressure in the core rod 1 can be automatically released after the bridge plug 6 is sealed.
The core rod 1 has a stepped surface for limiting the movement of the housing 3.
The sliding sleeve 2 is provided with a shear screw 7 which is fixed with the core bar 1 to prevent the shell 3 from moving initially.
The size of the sealing surface between the sliding sleeve 2 and the core bar 1 is consistent with that of the sealing surface between the shell 3 and the core bar 1.
As shown in figure 3, a propellant charge 9 is arranged in a core rod 1, the ground is electrified to ignite the propellant charge 9, gas generated by combustion of the propellant charge 9 is transmitted to the inner step surface of a shell 3 through 4 vent holes of the core rod 1, the pressure of gunpowder is continuously increased, a shearing and shearing screw 7 is sheared, the shell 3 and the core rod 1 generate relative motion, an adapter 10 extrudes a bridge plug 6 to realize seat sealing, and when an O-shaped ring on the inner step surface of the shell moves to a pressure relief groove 5 of the core rod 1, the gas pressure in the core rod 1 is communicated with the outside to realize automatic pressure relief.
Because the screw 2 needs to be cut off when reaching a certain pressure, initial pressure can be established in the inner cavity of the core rod 7, so that the ignition charge 10 can be reliably combusted, the shell 6 can move when the gunpowder is just combusted, and the pressure in the gunpowder cavity is reduced too fast to ensure that the ignition charge 10 is cut off. The screws 2 are high precision shear pins that have strength to avoid damage when the string is jarred and that can shear reliably at the designed shear pressures.
Pressure balance principle: the sliding sleeve 5 and the shell 6 are connected through threads to form a whole, and as the diameters of sealing surfaces of the sliding sleeve 5 and the shell 6 influenced by well fluid are the same, the upward acting force and the downward acting force of the pressure of the well fluid acting on the sliding sleeve 5 and the shell 6 are equal, and the sliding sleeve 5 and the shell 6 are not influenced by the pressure of the well fluid any more when moving.
Adopt the utility model discloses a method as follows:
the explosive column is installed in the core rod, the ground is electrified to ignite the explosive column, gas generated by combustion of the explosive column is transmitted to the inner step surface of the shell through 4 vent holes of the core rod, the pressure of explosive is continuously increased, the shell and the core rod move relatively, so that the bridge plug is extruded to realize seat sealing, and when an inner O-shaped ring of the shell moves to a pressure relief groove of the core rod, the gas pressure in the core rod is communicated with the outside, and automatic pressure relief is realized.
Claims (5)
1. The utility model provides a self-balancing gas pressure promotes formula bridging plug and sets up instrument which characterized in that: the device comprises a core rod (1), a sliding sleeve (2) and a shell (3), wherein the core rod (1) is provided with an inner hole for installing a gunpowder column (9), the core rod (1) is radially provided with a vent hole (4) in a through manner, the outer wall of the core rod (1) is provided with an outer step surface for limiting the movement position of the shell (3), the outer step surface of the core rod (1) is in sealing fit with the inner wall of the shell (3), the outer wall of the lower end of the core rod (1) is provided with a pressure relief groove (5), the inner wall of the lower end of the shell (3) is provided with an inner step surface, and the inner step surface of the shell (3) is positioned; in an initial state, the core rod (1) is fixedly connected with the sliding sleeve (2) and is in sealing fit with the inner wall of the sliding sleeve (2), the upper end of the shell (3) is fixedly connected with the sliding sleeve (2), the inner wall of the shell (3) is in sealing fit with the outer wall of the sliding sleeve (2), the inner step surface of the shell (3) is in sealing fit with the outer wall of the core rod (1), and the vent hole (4) is communicated with an annular space between the inner step surface and the outer step surface; when the bridge plug (6) is in a setting state, the sliding sleeve (2) moves downwards to the position of the outer step surface of the core rod (1) for limiting, the inner step surface of the shell (3) is positioned in the pressure relief groove (5), and a gap between the inner step surface and the pressure relief groove (5) forms a pressure relief channel.
2. The self-balancing gas pressure-propelled bridge plug setting tool of claim 1, wherein: the number of the vent holes (4) is 4, and the vent holes are arranged on the same circumference of the core rod (1).
3. The self-balancing gas pressure-propelled bridge plug setting tool of claim 2, wherein: the sliding sleeve (2) is fixedly connected with the core rod (1) through a shear screw (7).
4. The self-balancing gas pressure-propelled bridge plug setting tool of claim 3, wherein: the size of the sealing surface between the sliding sleeve (2) and the core rod (1) is consistent with that of the sealing surface between the shell (3) and the core rod (1).
5. The self-balancing gas pressure-propelled bridge plug setting tool of claim 4, wherein: all be provided with twice O shape circle (8) on sliding sleeve (2) inner wall and the outer wall, sliding sleeve (2) are through O shape circle (8) on the inner wall with core bar (1) sealed cooperation, through O shape circle (8) on the outer wall with casing (3) sealed cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988832.3U CN211448613U (en) | 2019-11-18 | 2019-11-18 | Self-balancing gas pressure pushing type bridge plug setting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921988832.3U CN211448613U (en) | 2019-11-18 | 2019-11-18 | Self-balancing gas pressure pushing type bridge plug setting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211448613U true CN211448613U (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921988832.3U Active CN211448613U (en) | 2019-11-18 | 2019-11-18 | Self-balancing gas pressure pushing type bridge plug setting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211448613U (en) |
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2019
- 2019-11-18 CN CN201921988832.3U patent/CN211448613U/en active Active
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