CN215408559U - Blowout preventer and pressure control drilling system - Google Patents
Blowout preventer and pressure control drilling system Download PDFInfo
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- CN215408559U CN215408559U CN202121083803.XU CN202121083803U CN215408559U CN 215408559 U CN215408559 U CN 215408559U CN 202121083803 U CN202121083803 U CN 202121083803U CN 215408559 U CN215408559 U CN 215408559U
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Abstract
The utility model provides a blowout preventer and a pressure-controlled drilling system, wherein the blowout preventer comprises: the system comprises a flexible joint, a universal blowout preventer, a riser connector, a shear ram, a first high-temperature ram, a first pipeline, a variable ram, a second pipeline, a second high-temperature ram, a third pipeline and a wellhead connector; the flexible joint, the universal blowout preventer, the riser connector, the shear ram, the first high temperature ram, the first pipe, the variable ram, the second pipe, the second high temperature ram, the third pipe, and the wellhead connector are connected in series in sequence. The utility model solves the problems that the sealing effect of a wellhead is poor when the seabed is drilled at high temperature and high pressure, and the drilling tool is easy to stick and clamp because the well pressure cannot be kept stable when the drilling tool is static.
Description
Technical Field
The utility model relates to an ocean pressure control drilling system, in particular to a blowout preventer and a pressure control drilling system.
Background
Deep wells with bottom hole temperatures greater than 150 c for maximum expected formation pore pressure gradients over 0.8 psi are generally referred to as high temperature, high pressure wells. When offshore high-temperature and high-pressure drilling operation is carried out, downhole complex conditions such as well kick, well leakage, well collapse, well block and the like are easy to occur. For this reason, bottom hole constant pressure controlled pressure drilling is performed by means of blowout preventers, rams, choke lines, etc., bottom hole pressure fluctuations can be reduced, and drilling operations can be safely conducted through formations with narrow density windows. The existing pressure control drilling system can cause the sticking and the blocking of a drilling tool due to the static state of the drilling tool in the processes of closing a well, solving the pressure, weighting or plugging, and the existing pressure control drilling system is easy to cause the failure of a blowout preventer and a flashboard due to the fact that the blowout preventer and the flashboard are placed on the seabed during seabed high-temperature and high-pressure exploitation and the seawater corrosion effect is added, so that the blowout preventer and the flashboard are not good in blowout prevention and sealing effects on a well head.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model aims to solve the technical problems that the wellhead blowout prevention and sealing effects are poor when the seabed is drilled at high temperature and high pressure, and the well pressure cannot be kept stable when a drilling tool is static, so that the drilling tool is easy to stick and block. To achieve the above object, the present invention provides a blowout preventer comprising: the system comprises a flexible joint, a universal blowout preventer, a riser connector, a shear ram, a first high-temperature ram, a first pipeline, a variable ram, a second pipeline, a second high-temperature ram, a third pipeline and a wellhead connector; the flexible joint, the universal blowout preventer, the riser connector, the shear ram, the first high temperature ram, the first pipe, the variable ram, the second pipe, the second high temperature ram, the third pipe, and the wellhead connector are connected in series in sequence.
Preferably, the universal blowout preventer comprises a first universal blowout preventer and a second universal blowout preventer, the first and second universal blowout preventers being in communication with each other, the first universal blowout preventer being in communication with the flexible joint, and the second universal blowout preventer being in communication with the riser connector.
The utility model also provides a pressure controlled drilling system comprising: the blowout preventer, the control valve group, the kill line, the throttle line, the pressure relief line and the well cementation pump. The kill line is in communication with the first conduit and the third conduit, the kill line and the control valve block being connected in series. The throttling pipeline is connected with the kill line in parallel, the throttling pipeline is communicated with the second pipeline, and the throttling pipeline is connected with the control valve group in series. The relief line is in series with the choke line and the kill line. The cementing pump is communicated with the kill line.
Preferably, the control valve group comprises a manual valve, a first hydraulic valve and a second hydraulic valve, and the manual valve, the first hydraulic valve and the second hydraulic valve are connected in parallel in pairs.
Preferably, the kill line communicates with the first conduit via a fourth conduit; the kill line is communicated with the third pipeline through a fifth pipeline, and the fourth pipeline is connected with the fifth pipeline in parallel.
Preferably, the fourth conduit is provided with a first plate valve.
Preferably, the fifth conduit is provided with a second plate valve.
Preferably, the kill line is provided with a third plate valve, and the third plate valve and the control valve group are connected in series.
Preferably, the throttling pipeline is provided with a fourth plate valve, and the fourth plate valve is connected with the control valve group in series.
Preferably, the pressure relief pipeline is provided with a fifth plate valve and a ball valve, and the fifth plate valve and the ball valve are connected in series.
The utility model has the beneficial effects that: set up variable flashboard, shear ram, two high temperature flashboards and the cooperation of universal preventer, improved the sealing performance of well head, even one of them flashboard became invalid, other flashboards still can play the effect of sealed well head. When the equivalent circulating pressure at the bottom of the well is higher, the throttling pipeline and the pressure relief pipeline can be opened to release the bottom pressure. When the bottom hole equivalent circulating pressure is lower, the cementing pump can be started to increase the kill line pressure, and further increase the bottom hole pressure. Therefore, the blowout preventer, the control valve group, the well killing pipeline, the pressure relief pipeline and the well cementing pump are matched for use, so that the equivalent circulating pressure at the bottom of the well can be accurately controlled, the micro-overbalance or micro-underbalance drilling of the drilling tool is realized, the mechanical drilling speed is greatly improved, and the sticking risk of the drilling tool caused by the static state of the drilling tool in the well shutting, pressure solving, weighting or leaking stoppage processes is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented according to the content of the description, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments of the present invention.
Drawings
FIG. 1 is a schematic view of a blowout preventer according to a first embodiment of the present invention;
FIG. 2 is a piping diagram of a managed pressure drilling system according to a second embodiment of the present invention.
Wherein, the reference numbers:
1 blowout preventer
10 Flexible joint
11 universal blowout preventer
110 first universal blowout preventer
111 second universal blowout preventer
12 riser connector
13 shear ram
14 first high-temperature gate
15 first pipeline
16 variable shutter
17 second conduit
18 second high temperature shutter
19 third conduit
20 well head connector
21 control valve group
210 hand valve
211 first hydraulic valve
212 second Hydraulic valve
22 well killing pipeline
23 throttle line
24 pressure relief pipeline
25 well cementing pump
26 fourth pipeline
27 fifth pipeline
28 first plate valve
29 second plate valve
30 third plate valve
31 fourth plate valve
32 fifth plate valve
33 ball valve
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and include, for example, fixed or removable connections or integral connections; the connection can be mechanical connection or electrical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
First embodiment
Referring to fig. 1, the present embodiment provides a blowout preventer 1, including: a flexible joint 10, a universal blowout preventer 11, a riser connector 12, a shear ram 13, a first high temperature ram 14, a first pipe 15, a variable ram 16, a second pipe 17, a second high temperature ram 18, a third pipe 19, and a wellhead connector 20. The flexible joint 10, the universal blowout preventer 11, the riser connector 12, the shear ram 13, the first high temperature ram 14, the first pipe 15, the variable ram 16, the second pipe 17, the second high temperature ram 18, the third pipe 19, and the wellhead connector 20 are connected in series in this order. The shear ram 13, the first high-temperature ram 14, the variable ram 16, the second high-temperature ram 18 and the universal blowout preventer 11 are used in a matched mode, the sealing performance of a closed wellhead during high-temperature and high-pressure drilling is improved, and even if one of the rams fails, other rams can still play a role in sealing the wellhead.
As shown in FIG. 1, preferably, the universal blowout preventer 11 comprises a first universal blowout preventer 110 and a second universal blowout preventer 111, the first universal blowout preventer 110 and the second universal blowout preventer 111 are in communication with each other, the first universal blowout preventer 110 is in communication with the flexible joint 10, and the second universal blowout preventer 111 is in communication with the riser connector 12. The first universal blowout preventer 111 and the second universal blowout preventer 112 are used in series, so that the sealing and blowout preventing performance of a closed wellhead during high-temperature and high-pressure drilling can be improved, and even if one of the universal blowout preventers fails, the other universal blowout preventer can still play a role in sealing the wellhead and preventing blowout.
Second embodiment
Referring to fig. 1 and fig. 2, the present embodiment provides a pressure-controlled drilling system, including: blowout preventer 1, control valve group 21, kill line 22, choke line 23, relief line 24, and cementing pump 25. Kill line 22 communicates with first conduit 15 and third conduit 19, and kill line 22 and control valve block 21 are connected in series. A choke line 23 is connected in parallel with the kill line 22, the choke line 23 communicating with the second conduit 17, the choke line 23 being connected in series with the control valve block 21. The relief line 24 is in series with the choke line 23 and the kill line 22. The cementing pump 25 is in communication with the kill line 22. When the bottom hole equivalent circulation pressure is higher, the throttling line 23 and the pressure relief line 24 can be opened to release the bottom hole pressure. When the bottom hole equivalent circulation pressure is low, the cementing pump 25 may be turned on to increase the pressure in the kill line 22, which in turn increases the bottom hole pressure. Therefore, the blowout preventer 1, the control valve group 21, the kill line 22, the relief line 24 and the cementing pump 25 are used in cooperation, so that the equivalent circulating pressure at the bottom of the well can be accurately controlled, the drilling tool is drilled in a micro-overbalance or micro-underbalance manner, the mechanical drilling speed is greatly improved, and the risk of sticking and blocking of the drilling tool caused by the static state of the drilling tool in the well shutting, pressure solving, weighting or leaking stoppage processes is reduced.
Preferably, the control valve group 21 comprises a manual valve 210, a first hydraulic valve 211 and a second hydraulic valve 212, and the manual valve 210, the first hydraulic valve 211 and the second hydraulic valve 212 are connected in parallel. The manual valve 210 enables manual opening and closing of the communication between the kill line 22 and the choke line 23. The first and second hydraulic valves 211 and 212 enable automatic opening and closing of the communication between the kill line 22 and the choke line 23.
Preferably, kill line 22 communicates with first conduit 15 via fourth conduit 26, kill line 22 communicates with third conduit 19 via fifth conduit 27, and fourth conduit 26 and fifth conduit 27 are connected in parallel. Because the fourth pipeline 26 and the fifth pipeline 27 are connected in parallel, only one pipeline can be communicated and the other pipeline can be used as a spare when the kill line 22 works.
Preferably, the fourth conduit 26 is provided with a first plate valve 28. The first plate valve 28 is used to open or close the fourth pipe 26. The number of first plate valves 28 is at least 1, preferably the number of first plate valves 28 is two.
Preferably, the fifth duct 27 is provided with a second plate valve 29. The second plate valve 29 is used to open or close the fifth pipe 26. The number of second plate valves 29 is at least 1, preferably the number of second plate valves 29 is two.
Preferably, the kill line 22 is provided with a third plate valve 30, the third plate valve 30 and the control valve block 21 being connected in series. A third plate valve 30 is used to open or close kill line 22. The number of the third plate valves 30 is at least 1, and preferably, the number of the third plate valves 30 is two.
Preferably, the throttling line 23 is provided with a fourth plate valve 31, the fourth plate valve 31 being in series with the control valve group 21. The four-plate valve 31 is used to open or close the throttle line 23. The number of the fourth plate valves 31 is at least 1, and preferably, the number of the fourth plate valves 31 is 4.
Preferably, the pressure relief line 24 is provided with a fifth plate valve 32 and a ball valve 33, the fifth plate valve 32 and the ball valve 33 being connected in series. The fifth plate valve 32 is used to open or close the relief line 24. The number of fifth plate valves 32 is at least 1, preferably the number of fifth plate valves 32 is 3. The number of ball valves 33 is at least 1.
While the blowout preventer and the pressure control drilling system provided by the embodiments of the present invention have been described in detail, those skilled in the art will appreciate that the embodiments of the present invention may be modified in various ways. In view of the foregoing, it will be seen that this invention is not limited by the foregoing description, but is intended to cover all equivalent modifications and changes in accordance with the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. A blowout preventer, comprising:
the system comprises a flexible joint, a universal blowout preventer, a riser connector, a shear ram, a first high-temperature ram, a first pipeline, a variable ram, a second pipeline, a second high-temperature ram, a third pipeline and a wellhead connector; the flexible joint, the universal blowout preventer, the riser connector, the shear ram, the first high temperature ram, the first pipe, the variable ram, the second pipe, the second high temperature ram, the third pipe, and the wellhead connector are connected in series in sequence.
2. The blowout preventer of claim 1, wherein the universal blowout preventer comprises a first universal blowout preventer and a second universal blowout preventer, the first universal blowout preventer and the second universal blowout preventer in communication with each other, the first universal blowout preventer in communication with the flex joint, and the second universal blowout preventer in communication with the riser connector.
3. A managed pressure drilling system, comprising:
a blowout preventer according to any one of claims 1 to 2;
a control valve group;
a kill line in communication with the first conduit and the third conduit, the kill line and the control valve block in series; a choke line in parallel with the kill line, the choke line in communication with the second conduit, the choke line in series with the control valve block;
a relief line in series with the choke line and the kill line; and
a cementing pump in communication with the kill line.
4. The managed pressure drilling system of claim 3, wherein the set of control valves comprises a manual valve, a first hydraulic valve, and a second hydraulic valve, the manual valve, the first hydraulic valve, and the second hydraulic valve being connected in parallel two by two.
5. The managed pressure drilling system of claim 3, wherein the kill line communicates with the first conduit through a fourth conduit; the kill line is communicated with the third pipeline through a fifth pipeline, and the fourth pipeline is connected with the fifth pipeline in parallel.
6. The managed pressure drilling system of claim 5, wherein the fourth conduit is provided with a first plate valve.
7. The managed pressure drilling system of claim 5, wherein the fifth conduit is provided with a second plate valve.
8. The managed pressure drilling system of claim 4, wherein the kill line is provided with a third plate valve, the third plate valve and the set of control valves being in series.
9. The managed pressure drilling system of claim 4, wherein the choke line is provided with a fourth plate valve, the fourth plate valve and the set of control valves being in series.
10. The managed pressure drilling system of claim 3, wherein the pressure relief line is provided with a fifth plate valve and a ball valve, the fifth plate valve and the ball valve being in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121083803.XU CN215408559U (en) | 2021-05-20 | 2021-05-20 | Blowout preventer and pressure control drilling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121083803.XU CN215408559U (en) | 2021-05-20 | 2021-05-20 | Blowout preventer and pressure control drilling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215408559U true CN215408559U (en) | 2022-01-04 |
Family
ID=79676109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121083803.XU Active CN215408559U (en) | 2021-05-20 | 2021-05-20 | Blowout preventer and pressure control drilling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215408559U (en) |
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2021
- 2021-05-20 CN CN202121083803.XU patent/CN215408559U/en active Active
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