CN217735436U - Annular blowout preventer capable of sealing well in emergency - Google Patents
Annular blowout preventer capable of sealing well in emergency Download PDFInfo
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- CN217735436U CN217735436U CN202221996823.0U CN202221996823U CN217735436U CN 217735436 U CN217735436 U CN 217735436U CN 202221996823 U CN202221996823 U CN 202221996823U CN 217735436 U CN217735436 U CN 217735436U
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Abstract
The utility model belongs to the blowout preventer field, in particular to an annular blowout preventer which can be used for emergency well sealing; comprises a shell, a top cover, a rubber core and a support ring; the emergency well sealing device comprises a control system, a driving system and a hydraulic oil discharge system; the utility model discloses set up emergent well plugging device on original annular preventer, constitute by drive, control and hydraulic oil discharge system, the pressure in the wireless bluetooth remote pressure sensor monitoring pneumatic cylinder of accessible judges whether hydraulic system work is normal, with the help of wireless transmission and automatic control technology control oil plug draining, electric telescopic handle promotes the piston and goes upward to realize in time well plugging, avoids unexpected the emergence, guarantees well control safety.
Description
Technical Field
The utility model belongs to the technical field of the preventer, concretely relates to annular preventer that can emergent shut-in.
Background
Annular blowout preventers are commonly known as multi-effect blowout preventers, universal blowout preventers and the like. The sealing device has the advantages of high pressure bearing, reliable sealing, convenient operation and quick opening and closing, is suitable for sealing tubular columns with various shapes and different sizes, and can also be used for sealing well mouths in a totally-closed manner. Annular blowout preventers are commonly used with ram blowout preventers, and may also be used alone.
The annular blowout preventer can be divided into a spherical rubber core annular blowout preventer, a conical rubber core annular blowout preventer and a combined rubber core annular blowout preventer according to the shape of the rubber core. The piston of the spherical rubber core annular blowout preventer is Z-shaped, hydraulic oil enters a closing cavity of an oil cavity to push the piston to move upwards, the rubber core also moves upwards, and under the limiting action of the hemispherical top cover, the rubber core can only contract centripetally to extrude rubber to seal a well mouth. The spherical rubber core blowout preventer has the characteristics that the radial distance of a piston is large, the hydraulic oil amount required by starting is large, and in case of a problem of a hydraulic system, the annular blowout preventer falls into a paralyzed state and cannot seal a well in time, so that an emergency device is required to be provided, and the piston can be timely found and pushed to move when the hydraulic system breaks down.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: when a hydraulic system of the annular blowout preventer breaks down, the hydraulic system can find and push the piston to move in time to realize well sealing.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme as follows:
the annular blowout preventer capable of sealing a well emergently comprises a shell, wherein a top cover is arranged at the upper end of the shell, a spherical cavity is arranged in the top cover, and a rubber core is arranged in the spherical cavity; a cavity for placing an oil pipe is arranged in the middle of the inside of the shell, and a concave hydraulic cavity is arranged on the inner wall of the shell at the circumferential direction of the cavity; a piston is arranged in the concave hydraulic cavity and is Z-shaped; support rings are arranged between the outer circular wall of the upper part of the piston, the inner wall of the shell and the lower end face of the top cover;
the upper part of the bottom of the piston, the support ring and the concave hydraulic cavity of the shell form an upper oil cavity together; a lower oil cavity is formed below the piston and the concave hydraulic cavity of the shell together;
the emergency well shut-in device comprises a control system, a driving system and a hydraulic oil discharge system; the hydraulic oil discharge system comprises an oil discharge hole formed in the side wall of the shell of the upper oil cavity, an oil plug is arranged in the oil discharge hole, and an electromagnetic valve is arranged in the oil plug;
the driving system comprises an electric telescopic rod, a pressure sensor and a sealing element, a through hole is formed in the bottom of the lower oil cavity, the telescopic rod of the electric telescopic rod is arranged in the through hole, the head of the telescopic rod is provided with the pressure sensor, and the sealing element is arranged between the telescopic rod and the through hole;
the electric telescopic rod, the electromagnetic valve and the pressure sensor are all connected with the control system.
Further, the pressure sensor is a wireless Bluetooth remote pressure sensor.
Furthermore, a screw is arranged at the lower part of the pressure sensor, a threaded counter bore is formed in the top of a telescopic rod of the electric telescopic rod, and the pressure sensor is connected to the electric telescopic rod through a thread.
Furthermore, the sealing element is formed by arranging two grooves on the inner wall of the through hole, an O-shaped adhesive tape is arranged in the groove at the lower part, and a double-lip-shaped sealing ring is arranged in the groove at the upper part.
Furthermore, two symmetrical driving systems are arranged at the bottom of the lower oil cavity.
Further, the oil plug is in interference fit with the oil drain hole.
Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:
the utility model discloses set up emergent well shutting device on original annular preventer, constitute by drive, control and hydraulic oil discharge system, pressure in the wireless bluetooth remote pressure sensor monitoring pneumatic cylinder of accessible judges whether hydraulic system work is normal, controls the oil plug draining with the help of wireless transmission and automated control technique, and electric telescopic handle promotes the piston and goes upward to realize in time well shutting, avoids unexpected the emergence, guarantees well control safety.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partial structure enlarged view at I in fig. 1.
Detailed Description
The present invention will be further illustrated by the following specific examples, which are carried out on the premise of the technical scheme of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, the annular blowout preventer capable of emergency well sealing comprises a housing 1, wherein a top cover 2 is arranged at the upper end of the housing 1, a spherical cavity is arranged inside the top cover 2, and a rubber core 3 is arranged in the spherical cavity; a cavity for placing an oil pipe is arranged in the middle of the inside of the shell 1, and a concave hydraulic cavity is arranged on the inner wall of the shell 1 at the circumferential direction of the cavity; a piston 4 is arranged in the concave hydraulic cavity, and the piston 4 is Z-shaped; and a support ring 5 is arranged between the outer circular wall of the upper part of the piston 4 and the inner wall of the shell 1 and the lower end surface of the top cover 2.
An upper oil cavity A is formed by the upper part of the bottom of the Z-shaped piston 4, the support ring 5 and the concave hydraulic cavity of the shell 1; a lower oil cavity B is formed below the Z-shaped piston 4 and a concave hydraulic cavity of the shell 1; the oil pressure in and out of the upper oil cavity A and the lower oil cavity B is controlled, and the piston 4 moves up and down to open or glue the rubber core 3.
The emergency well sealing device comprises a control system, a driving system and a hydraulic oil discharge system. The hydraulic oil discharge system comprises an oil discharge hole 6 formed in the side wall of the shell of the upper oil cavity A, an oil plug 7 is arranged in the oil discharge hole 6, an electromagnetic valve 8 is arranged in the oil plug 7, and the oil plug 7 is externally connected with an oil discharge pipe and an oil storage tank and can store hydraulic oil. The hydraulic oil discharge system has the advantages that the hydraulic oil is discharged by opening the oil plug in time when the hydraulic system breaks down, the driving system is convenient to push the piston to move upwards, and well sealing is achieved. The oil plug 7 is interference fitted with the oil drain hole 6.
The driving system comprises an electric telescopic rod 9, a pressure sensor 10 and a sealing piece 11, a through hole is formed in the bottom of the lower oil cavity B, a telescopic rod of the electric telescopic rod 9 is arranged in the through hole, the head of the telescopic rod is provided with the pressure sensor 10, and the sealing piece 11 is arranged between the telescopic rod and the through hole. The driving system has the effects that when the hydraulic system breaks down, the driving system can be started to push the piston 4 to move upwards to seal a wellhead, and leakage at the through hole is required to be avoided under the condition that the hydraulic system works normally, so that a sealing element between the electric telescopic rod 9 and the through hole is important; the pressure sensor 10 is installed at the top of the telescopic rod of the electric telescopic rod 9, can receive the pressure of hydraulic oil, selects the existing wireless Bluetooth remote pressure sensor and is powered by a battery. The device has the characteristics of low energy consumption, bluetooth output and small structure, and can be widely applied to water pressure detection and air pressure and oil pressure detection.
As shown in fig. 2, a screw 12 is provided at the lower part of the pressure sensor 10, a screw-threaded counter bore 13 is directly provided at the top of the telescopic rod of the electric telescopic rod 9, and the pressure sensor 10 is connected to the electric telescopic rod 9 by screw thread. Such pressure sensors must, of course, be able to withstand the high pressures (300-400 bar) within the cylinder, however, there are currently some types of pressure sensors which are designed to operate in high pressure environments, such as 500 bar, as are currently available.
Under the normal operating condition, the telescopic link of electric telescopic handle 9 is less than the bottom horizontal plane of lower oil pocket B, and the upper portion of through-hole sets up the oblique angle of expanding outward type, and pressure sensor 10 is parallel and level with the horizontal plane of lower oil pocket B. The pressure sensor is used for monitoring the pressure of hydraulic oil, because the upper oil cavity injects oil to the lower oil cavity to push the piston to move upwards in the normal well sealing process of the hydraulic system, the pressure is the mutual principle that the bottom of the lower oil cavity is also subjected to pressure, the pressure sensor receives the pressure, and if the well sealing signal is sent, the hydraulic system fails and cannot convey the hydraulic oil to the lower oil cavity, and the pressure sensor cannot detect the pressure, so that the hydraulic system fails.
The electric telescopic rod 9, the electromagnetic valve 8 and the pressure sensor 10 are all connected with a control system.
The control system is a master control system of the well control device, controls the action of the whole blowout preventer and ensures the safety of well shut-in. The utility model discloses a theory of operation: if pressure sensor 10 can not detect pressure within a few seconds after total control system sends the signal of sealing a well, then explain hydraulic system breaks down, at this moment total control system starts hydraulic oil discharge system and actuating system, opens solenoid valve 8 promptly and lets out oil, starts simultaneously that electric telescopic handle 9 propelling movement piston 4 goes upward and seals a well, and pressure sensor 10 receives propelling movement pressure again, proves that electric telescopic handle 9 is in work. Although the electric telescopic rod 9 causes the pressure sensor 10 to bear excessive extrusion force during the process of pushing the piston 4, and causes abrasion, the driving system is driven only in emergency, the use times are very few, and the influence can be ignored.
The sealing element 11 is provided with two grooves on the inner wall of the through hole, an O-shaped adhesive tape is arranged in the groove at the lower part, and a double-lip-shaped sealing ring is arranged in the groove at the upper part. The double sealing ensures that hydraulic oil does not leak from the through hole.
In order to ensure the driving system to drive the piston uniformly, two symmetrical driving systems are arranged at the bottom of the lower oil cavity B.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (6)
1. But annular preventer of emergent well shutting, its characterized in that: the device comprises a shell (1), wherein a top cover (2) is arranged at the upper end of the shell (1), a spherical cavity is arranged in the top cover (2), and a rubber core (3) is arranged in the spherical cavity; a cavity for placing an oil pipe is arranged in the middle of the inside of the shell (1), and a concave hydraulic cavity is arranged on the inner wall of the shell (1) in the circumferential direction of the cavity; a piston (4) is arranged in the concave hydraulic cavity, and the piston (4) is Z-shaped; support rings (5) are arranged between the outer circular wall of the upper part of the piston (4), the inner wall of the shell (1) and the lower end surface of the top cover (2);
an upper oil cavity (A) is formed by the concave hydraulic cavity of the support ring (5) and the shell (1) above the bottom of the piston (4); a lower oil cavity (B) is formed below the piston (4) and a concave hydraulic cavity of the shell (1);
the emergency well shut-in device comprises a control system, a driving system and a hydraulic oil discharge system; the hydraulic oil discharge system comprises an oil discharge hole (6) formed in the side wall of the shell (1) of the upper oil cavity (A), an oil plug (7) is arranged in the oil discharge hole (6), and an electromagnetic valve (8) is arranged in the oil plug (7);
the driving system comprises an electric telescopic rod (9), a pressure sensor (10) and a sealing piece (11), a through hole is formed in the bottom of the lower oil cavity (B), a telescopic rod of the electric telescopic rod (9) is arranged in the through hole, the pressure sensor (10) is arranged at the head of the telescopic rod, and the sealing piece (11) is arranged between the telescopic rod and the through hole;
the electric telescopic rod (9), the electromagnetic valve (8) and the pressure sensor (10) are all connected with the control system.
2. The emergency blowout preventer of claim 1, wherein: the pressure sensor (10) is a wireless Bluetooth remote pressure sensor.
3. The emergency blowout preventer of claim 1, wherein: the lower part of the pressure sensor (10) is provided with a screw (12), the top of the telescopic rod of the electric telescopic rod (9) is provided with a threaded counter bore (13), and the pressure sensor (10) is in threaded connection with the electric telescopic rod (9).
4. The emergency blowout preventer of claim 1, wherein: the sealing element (11) is characterized in that two grooves are formed in the inner wall of the through hole, an O-shaped adhesive tape is arranged in the groove in the lower portion, and a double-lip-shaped sealing ring is arranged in the groove in the upper portion.
5. The emergency blowout preventer of claim 1, wherein: and the bottom of the lower oil cavity (B) is provided with two symmetrical driving systems.
6. The emergency blowout preventer of claim 1, wherein: and the oil plug (7) is in interference fit with the oil drain hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221996823.0U CN217735436U (en) | 2022-07-30 | 2022-07-30 | Annular blowout preventer capable of sealing well in emergency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221996823.0U CN217735436U (en) | 2022-07-30 | 2022-07-30 | Annular blowout preventer capable of sealing well in emergency |
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| Publication Number | Publication Date |
|---|---|
| CN217735436U true CN217735436U (en) | 2022-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221996823.0U Active CN217735436U (en) | 2022-07-30 | 2022-07-30 | Annular blowout preventer capable of sealing well in emergency |
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| CN (1) | CN217735436U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898319A (en) * | 2023-02-24 | 2023-04-04 | 四川新为橡塑有限公司 | Compound annular preventer of two rubber cores |
-
2022
- 2022-07-30 CN CN202221996823.0U patent/CN217735436U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115898319A (en) * | 2023-02-24 | 2023-04-04 | 四川新为橡塑有限公司 | Compound annular preventer of two rubber cores |
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