CN111852379A - Valve linkage device, drill rod shearing method and blowout preventer control device - Google Patents
Valve linkage device, drill rod shearing method and blowout preventer control device Download PDFInfo
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- CN111852379A CN111852379A CN202010814380.8A CN202010814380A CN111852379A CN 111852379 A CN111852379 A CN 111852379A CN 202010814380 A CN202010814380 A CN 202010814380A CN 111852379 A CN111852379 A CN 111852379A
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- 238000010008 shearing Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 61
- 230000006698 induction Effects 0.000 claims description 27
- 230000001939 inductive effect Effects 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 7
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/06—Blow-out preventers, i.e. apparatus closing around a drill pipe, e.g. annular blow-out preventers
- E21B33/061—Ram-type blow-out preventers, e.g. with pivoting rams
- E21B33/062—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams
- E21B33/063—Ram-type blow-out preventers, e.g. with pivoting rams with sliding rams for shearing drill pipes
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Abstract
The invention discloses a valve linkage device which comprises a linkage execution mechanism, a second pressure source and a logic sequence valve, wherein the linkage execution mechanism is used for controlling a bypass valve to be in an open position when a shearing gate valve is in a closed position so as to enable a first pressure source to output first pressure to a shearing gate blowout preventer, and the logic sequence valve is arranged on a pipeline between the second pressure source and the shearing gate blowout preventer and used for enabling the second pressure source to output second pressure to the shearing gate blowout preventer when first operation is executed. The invention also discloses a drill rod shearing method and a blowout preventer control device. The invention can avoid that the pressure of the shearing flashboard is insufficient and the drill rod cannot be sheared because an operator does not or forgets to open the bypass valve when the shearing is required to be closed under the condition of high tension.
Description
Technical Field
The invention relates to the technical field of oil exploitation, in particular to a shearing gate valve and bypass valve linkage device applied to oil exploitation drilling operation, a method for quickly shearing a drill rod by utilizing a shearing gate blowout preventer and a blowout preventer control device.
Background
The hydraulic blowout preventer and the blowout preventer control device are very important blowout prevention equipment widely used in petroleum exploration, development and drilling. The system rated pressure of a general blowout preventer control device is 21MPa, the control working pressure of a ram blowout preventer is 10.5MPa under general conditions, and when a shearing ram needs to be operated to shear a drill rod, the required working pressure is 21MPa or even higher, so that when the shearing ram needs to be operated, the operation process is to open a bypass valve, enable the system pressure to be 21MPa to enter a manifold, close a shearing ram valve and enable the system pressure to be 21MPa to be directly supplied to a shearing ram hydraulic cylinder to shear the drill rod. When the shearing is required to be operated, abnormal conditions often occur at a well mouth and even the emergency treatment is performed, and under the condition that operators are highly tense, when the shearing gate valve is easily operated, a bypass valve is not opened, so that the pressure of the shearing gate valve is insufficient, a drill rod cannot be sheared, and further dangerous situations can be caused.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide a valve linkage device, which can prevent the situation that the pressure of a shear gate plate is insufficient and a drill rod cannot be cut off due to the fact that an operator does not (or forgets) to open a bypass valve when the operator needs to close the shear under the condition of high stress.
One of the purposes of the invention is realized by adopting the following technical scheme:
a valve linkage comprises a linkage actuator, a second pressure source and a logic sequence valve, wherein the linkage actuator is used for controlling a bypass valve to be in an open position when a shear ram valve is in an off position so as to enable a first pressure source to output first pressure to a shear ram blowout preventer, and the logic sequence valve is arranged on a pipeline between the second pressure source and the shear ram blowout preventer and used for enabling the second pressure source to output second pressure to the shear ram blowout preventer when first operation is executed.
As a preferred embodiment, the linkage executing mechanism comprises an induction travel switch and a first shuttle valve, a first valve port of the induction travel switch is communicated with an external air source, a second valve port of the induction travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a control mechanism of the induction travel switch is matched with the shear gate valve, an liquid inlet of the shear gate blowout preventer is communicated with the first valve port of the shear gate valve, a second valve port of the shear gate valve is communicated with the first valve port of the bypass valve through a third pipeline, and a second valve port of the bypass valve is communicated with a first pressure source;
when the shearing gate valve is in the closed position, the first valve port and the second valve port of the shearing gate valve are communicated, the control mechanism controls the first valve port and the second valve port of the induction travel switch to be communicated, so that an external air source drives the bypass valve to be in the open position, the first valve port and the second valve port of the bypass valve are communicated, and the first pressure source outputs first pressure to the shearing gate plate blowout preventer.
As a preferred embodiment, the linkage executing mechanism further includes a first liquid-gas switch, a liquid inlet of the logic sequence valve is communicated with the second pressure source through a fourth pipeline, a liquid outlet of the logic sequence valve is communicated with the third pipeline through a fifth pipeline, a liquid inlet of the first liquid-gas switch is communicated with the fifth pipeline, a gas inlet of the first liquid-gas switch is communicated with the first pipeline through a sixth pipeline, and a gas outlet of the first liquid-gas switch is communicated with a gas inlet of the logic sequence valve;
when the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value, the gas inlet and the gas outlet of the first liquid-gas switch are communicated, when the gas inlet pressure of the logic sequence valve is greater than a second preset threshold value, the logic sequence valve executes a first operation, and the liquid inlet and the liquid outlet of the logic sequence valve are communicated.
In a preferred embodiment, a first stop valve is mounted on the first pipeline or/and a second stop valve is mounted on the sixth pipeline.
As a preferred embodiment, the linkage actuating mechanism further comprises a second shuttle valve, a first air inlet of the second shuttle valve is communicated with the first pipeline through a seventh pipeline, a working port of the second shuttle valve is connected to a closing position of the half gate valve, a first valve port of the half gate valve is connected to a first valve port of the bypass valve through an eighth pipeline, and a second valve port of the half gate valve is connected to the half gate blowout preventer through a ninth pipeline;
when the shearing gate valve is in the closed position, the control mechanism controls an external air source to drive the bypass valve to be in the closed position through the second shuttle valve, the first valve port and the second valve port of the half-seal gate valve are communicated, and the first pressure source outputs first pressure to the half-seal gate blowout preventer.
As a preferred embodiment, the valve linkage further comprises a delivery pump for pressurizing a working fluid and delivering the working fluid into the second pressure source.
As a preferred embodiment, the valve linkage device further includes an automatic pressurization mechanism, the automatic pressurization mechanism includes a power source and a second hydraulic switch, an inlet of the second hydraulic switch is communicated with a second pressure source, a first valve port of the second hydraulic switch is communicated with the power source, a second valve port of the second hydraulic switch is communicated with a power source inlet of the delivery pump, and when an inlet pressure of the second hydraulic switch is greater than a third preset threshold value, the first valve port and the second valve port of the second hydraulic switch are communicated.
The invention also aims to provide a drill rod shearing method, which can avoid the situation that under the condition of high stress of operators, when the shearing needs to be closed, a bypass valve is not (or is forgotten to be) opened, so that the pressure of a shearing flashboard is insufficient, and the drill rod cannot be sheared.
The second purpose of the invention is realized by adopting the following technical scheme:
a method of using the valve linkage assembly for shearing a drill pipe, which is one of the objects of the present invention, comprises the steps of:
operating the shearing gate valve to be in a closed position;
the linkage executing mechanism controls the bypass valve to be in an open position according to the off-position information, and the first pressure source outputs first pressure to the shear ram blowout preventer;
when the demand pressure is greater than the first pressure, the linkage actuator drives the logic sequence valve to perform a first operation, and the second pressure source outputs a second pressure to the shear ram blowout preventer.
As a preferred embodiment, the linkage executing mechanism comprises an induction travel switch and a first shuttle valve, a first valve port of the induction travel switch is communicated with an external air source, a second valve port of the induction travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a control mechanism of the induction travel switch is matched with the shear gate valve, an liquid inlet of the shear gate blowout preventer is communicated with the first valve port of the shear gate valve, a second valve port of the shear gate valve is communicated with the first valve port of the bypass valve through a third pipeline, and a second valve port of the bypass valve is communicated with a first pressure source;
the linkage actuating mechanism controls the bypass valve to be in an open position according to the off-position information, and the first pressure source outputs first pressure to the shear ram blowout preventer, and the linkage actuating mechanism comprises:
when the shearing gate valve is in the closed position, a first valve port and a second valve port of the shearing gate valve are communicated;
the control mechanism controls the first valve port and the second valve port of the induction travel switch to be communicated according to the off-position information, so that an external air source drives the bypass valve to be in an open position, the first valve port and the second valve port of the bypass valve are communicated, and the first pressure source outputs first pressure to the shearing ram blowout preventer.
As a preferred embodiment, the linkage executing mechanism further includes a first liquid-gas switch, a liquid inlet of the logic sequence valve is communicated with the second pressure source through a fourth pipeline, a liquid outlet of the logic sequence valve is communicated with the third pipeline through a fifth pipeline, a liquid inlet of the first liquid-gas switch is communicated with the fifth pipeline, a gas inlet of the first liquid-gas switch is communicated with the first pipeline through a sixth pipeline, and a gas outlet of the first liquid-gas switch is communicated with a gas inlet of the logic sequence valve;
when the demand pressure is greater than the first pressure, the linkage actuator drives the logic sequence valve to perform a first operation, and a second pressure source outputs a second pressure to a shear ram blowout preventer, comprising:
the first pressure source conveys working liquid to the liquid inlet of the first liquid-gas switch through a third pipeline and a fifth pipeline, so that the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value, and the gas inlet and the gas outlet of the first liquid-gas switch are communicated;
the external gas source conveys gas to a gas inlet of the logic sequence valve through a first pipeline and a sixth pipeline, so that the gas inlet pressure of the logic sequence valve is larger than a second preset threshold value, the logic sequence valve executes a first operation, a liquid inlet and a liquid outlet of the logic sequence valve are communicated, and a second pressure source outputs second pressure to the shearing ram blowout preventer.
The invention also aims to provide a blowout preventer control device, which can avoid the situation that under the condition that operators are highly stressed, when the operators need to close shearing, a bypass valve is not (or is forgotten to be) opened, so that the pressure of a shearing gate is insufficient, and a drill rod cannot be sheared.
The third purpose of the invention is realized by adopting the following technical scheme:
a blowout preventer control apparatus including a valve linkage as set forth in one of the objects of the present invention.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a valve linkage device which comprises a linkage execution mechanism, a second pressure source and a logic sequence valve, wherein the linkage execution mechanism is used for controlling a bypass valve to be in an open position when a shearing gate valve is in a closed position so that a first pressure source outputs a first pressure to a shearing gate blowout preventer, and the logic sequence valve is arranged on a pipeline between the second pressure source and the shearing gate blowout preventer and is used for enabling the second pressure source to output a second pressure to the shearing gate blowout preventer when a first operation is executed.
Drawings
FIG. 1 is a block diagram of a valve linkage assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of a shear gate valve configuration;
FIG. 3 is a flow chart of a method for shearing a drill pipe according to an embodiment of the invention.
In the figure: 01. shearing a gate valve; 02. a bypass valve; 03. an inductive travel switch; 04. a first shuttle valve; 05. a first shut-off valve; 06. a logical sequence valve; 07. a delivery pump; 08. a second pressure source; 09. a first hydro-pneumatic switch; 10. a second liquid-gas switch; 11. a second stop valve; 121. a shear ram blowout preventer; 122. a semi-closed ram blowout preventer; 13. the bypass of the gas circuit board is opened; 14. a working port of a first shuttle valve; 15. a control mechanism; 16. semi-closed gate valve.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict. Except as specifically noted, the materials and equipment used in this example are commercially available. Examples of embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "connected," "communicating," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a connection through an intervening medium, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, 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.
The first embodiment is as follows:
referring to fig. 1 and 2, a valve linkage device includes a linkage actuator, a second pressure source, and a logic sequence valve, the linkage actuator is configured to control a bypass valve 02 to be in an open position when a shear ram valve 01 is in a closed position, so that a first pressure source outputs a first pressure to a shear ram blowout preventer 121 (i.e., the first pressure source supplies pressure to a cylinder of the shear ram blowout preventer, and a pressure value is a first pressure value), and the logic sequence valve 06 is installed on a pipeline between a second pressure source 08 and the shear ram blowout preventer and is configured to enable the second pressure source to output a second pressure to the shear ram blowout preventer when a first operation is performed (i.e., the second pressure source supplies pressure to the cylinder of the shear ram blowout preventer, and the pressure value is a second pressure value).
The shearing gate valve and the bypass valve are linked through the linkage executing mechanism, when the shearing gate valve is in an off position, the bypass valve is opened along with the shearing gate valve, so that a first pressure source can be conveyed to the shearing gate blowout preventer through the bypass valve and the shearing gate valve sequentially and has a first pressure value, the first pressure source can adopt a hydraulic source with working media being liquid, the first pressure source supplies pressure to a hydraulic cylinder of the shearing gate, and the shearing gate is driven to extrude a drill rod to complete the operation of shearing the drill rod.
The mode of controlling the shearing gate valve to be in the closing position can be local manual operation or remote driller platform operation. The linkage executing mechanism comprises an induction travel switch 03 and a first shuttle valve 04, a first valve port of the induction travel switch is communicated with an external air source, a second valve port of the induction travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port 14 of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a second air inlet of the first shuttle valve is connected to an air plate bypass open position 13, a control mechanism 15 of the induction travel switch is matched with the shearing gate valve, an liquid inlet of the shearing gate plate blowout preventer is communicated with the first valve port of the shearing gate plate valve, a second valve port of the shearing gate plate valve is communicated with the first valve port of the bypass valve through a third pipeline, and a second valve port of the bypass valve is communicated with a first pressure source.
The blowout preventer is provided with a shear ram, a semi-seal ram and the like, a part provided with the shear ram is called a shear ram blowout preventer 121, a part provided with the semi-seal ram is called a semi-seal ram blowout preventer 122, the shear ram is used for shearing a drill rod, and the semi-seal ram blowout preventer is used for holding the drill rod to be positioned at the center of the blowout preventer before the shear ram shears the drill rod, so that the drill rod is prevented from deviating, and the shearing effect of the shear ram on the drill rod is facilitated.
As an implementation manner, the induction travel switch may be a mechanically controlled directional control valve, when the mechanically controlled directional control valve is used, the control mechanism may be a mechanically controlled mechanism such as a cam, a roller, a lever or a bump, and the mechanically controlled mechanism is used to control a valve core of the mechanically controlled directional control valve to change positions, so as to achieve the purpose of direction change, so that the first valve port and the second valve port of the induction travel switch are communicated, the mechanically controlled mechanism is used to cooperate with a control lever of the shearing gate valve, that is, when the control lever positions the shearing gate valve at a closed position, the control lever applies pressure to the mechanically controlled mechanism, so that the mechanically controlled mechanism controls the valve core of.
As another embodiment, the inductive travel switch may be a pneumatic directional valve, and when the pneumatic directional valve is used, the control mechanism may be a lever-type pneumatic control switch, and when the shearing gate valve is in the off position, the external gas is communicated with the open position of the pneumatic control switch, so as to operate the valve core of the pneumatic directional valve to change positions, and thus the first valve port and the second valve port of the inductive travel switch are communicated.
The bypass valve can also adopt a pneumatic reversing valve, when a first valve port and a second valve port of the inductive travel switch are communicated, an external air source is communicated to the open position of a pneumatic control switch of the bypass valve through a first shuttle valve, so that the bypass valve is in the open position, the first valve port and the second valve port of the bypass valve are communicated, at the moment, a first pressure source outputs first pressure to the shearing flashboard blowout preventer through the bypass valve, a third pipeline and the shearing flashboard valve, and the first pressure is generally about 21 MPa.
Also mounted in the first conduit is a first shut-off valve 05 which is normally placed in an open position.
According to different field conditions, especially under the condition that the strength of some drill rods is improved at present, the drill rods cannot be completely sheared under the first pressure of the shearing flashboard, and well mouth danger is easily generated. In a preferred embodiment of the present invention, a second pressure (e.g., a pressure value of the second pressure of 28MPa) greater than the first pressure is provided by the second pressure source to the shear ram blowout preventer by controlling a logic sequence valve mounted between the second pressure source and the shear ram blowout preventer by a linkage actuator.
Specifically, the linkage execution mechanism further comprises a first liquid-gas switch 09, a liquid inlet of the logic sequence valve is communicated with a second pressure source through a fourth pipeline, a liquid outlet of the logic sequence valve is communicated with a third pipeline through a fifth pipeline, a liquid inlet of the first liquid-gas switch is communicated with the fifth pipeline, a gas inlet of the first liquid-gas switch is communicated with the first pipeline through a sixth pipeline, and a gas outlet of the first liquid-gas switch is communicated with a gas inlet of the logic sequence valve.
When the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value (the liquid inlet pressure of the first liquid-gas switch is from a first pressure source, and therefore the first preset value can be set to be slightly smaller than a first pressure value), the gas inlet and the gas outlet of the first liquid-gas switch are communicated, and when the gas inlet pressure of the logic sequence valve is greater than a second preset threshold value (the gas inlet pressure of the logic sequence valve is from an external gas source, and therefore the second preset threshold value can be set according to the gas source pressure, for example, the second preset threshold value is slightly smaller than the gas pressure value of the external gas source), the logic sequence valve executes a first operation, and the liquid inlet and the liquid outlet of the logic sequence valve are communicated.
Because the second pressure source is just started when needed, consequently, can set up the second stop valve on the sixth pipeline, simultaneously, the one end that the sixth pipeline kept away from the air inlet of first liquid gas switch is connected to the first pipeline between the first air inlet of first stop valve and first shuttle valve to in earlier stage carry out the prejudgement to the intensity of drilling rod, when needing to be greater than first pressure output to the shear ram preventer, opening the second stop valve, otherwise, the second stop valve is in the off-position.
The linkage execution mechanism further comprises a second shuttle valve, a first air inlet of the second shuttle valve is communicated with the first pipeline through a seventh pipeline, a working port of the second shuttle valve is connected to a closing position of the half gate valve, a first valve port of the half gate valve 16 is connected to a first valve port of the bypass valve through an eighth pipeline, and a second valve port of the half gate valve is connected to the half gate blowout preventer 122 through a ninth pipeline.
The matching relationship between the second shuttle valve and the half gate valve is similar to that between the first shuttle valve and the bypass valve, and the description is omitted here. When the shearing gate valve is in the closed position, the control mechanism controls an external air source to drive the bypass valve to be in the closed position through the second shuttle valve, the first valve port and the second valve port of the half-seal gate valve are communicated, and the first pressure source outputs first pressure to the half-seal gate blowout preventer.
The linkage of the semi-closed gate valve and the shearing gate valve can realize that the first pressure source supplies pressure to a hydraulic cylinder of the semi-closed gate blowout preventer through the semi-closed gate valve, and at the moment, the semi-closed gate blowout preventer embraces a drill rod to the central position of the blowout preventer, so that the drill rod is prevented from deviating, and the shearing effect of the shearing gate on the drill rod is facilitated.
In order to ensure that the pressure of the second pressure source is around the second pressure, in a preferred embodiment of the present invention, a delivery pump 07 and an automatic pressurization mechanism are further provided, wherein the delivery pump is used for pressurizing the working fluid and delivering the working fluid into the high-pressure accumulator. The automatic pressurization mechanism is used for starting the delivery pump to realize pressurization of the high-pressure energy accumulator when the output pressure of the high-pressure energy accumulator is smaller than the second pressure.
The automatic supercharging mechanism comprises a power source and a second hydraulic switch 10, wherein a liquid inlet of the second hydraulic switch is communicated with a second pressure source, a first valve port of the second hydraulic switch is communicated with the power source, a second valve port of the second hydraulic switch is communicated with a power source inlet of the delivery pump, and when the liquid inlet pressure of the second hydraulic switch is larger than a third preset threshold value, the first valve port and the second valve port of the second hydraulic switch are communicated.
The power source may be an air source or a hydraulic source, and is selected according to the type of the delivery pump, for example, when the delivery pump is an air pump, the power source is an air source, and the liquid inlet pressure of the second liquid-gas switch is from the second pressure source, so that the third preset threshold may be set to the second pressure value, or slightly smaller than the second pressure value. When the output pressure of the second pressure source is smaller than the second pressure value, the external air source transmits power to the air pump, so that the air pump works to pressurize the external working liquid and transmit the pressurized working liquid to the high-pressure energy storage device.
The valve linkage device mainly comprises a linkage execution mechanism and a logic sequence valve, and the local operation of an original bypass valve on the blowout preventer control device is not influenced, or the bypass valve is remotely operated through a driller's rig. And when the shearing flashboard of the blowout preventer is replaced by the control full-closed flashboard, the operating pressure is about 10.5MPa, and the valve linkage device does not perform linkage operation on the bypass valve because part of the devices are arranged on the shearing flashboard valve.
By implementing the embodiment of the invention, the situation that the pressure of the shearing gate plate is insufficient and the drill rod cannot be sheared due to the fact that the bypass valve is not (or is forgotten to) opened when the shearing is required to be closed under the condition that an operator is highly stressed can be avoided, and meanwhile, the drill rod can be rapidly sheared through higher pressure according to the requirement.
Example two
The second embodiment discloses a method for shearing a drill rod, as shown in fig. 3, which includes the following steps:
s310, operating the shearing gate valve to enable the shearing gate valve to be in a closed position.
The mode of controlling the shearing gate valve to be in the closing position can be local manual operation or remote driller platform operation.
S320, the linkage executing mechanism controls the bypass valve to be in an open position according to the off-position information, and the first pressure source outputs first pressure to the shearing ram blowout preventer.
The linkage execution mechanism comprises an induction travel switch, a first shuttle valve and a second shuttle valve, wherein a first valve port of the induction travel switch is communicated with an external air source, a second valve port of the induction travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a control mechanism of the induction travel switch is matched with the shearing gate valve, a liquid inlet of the shearing gate plate blowout preventer is communicated with the first valve port of the shearing gate plate valve, a second valve port of the shearing gate plate valve is communicated with the first valve port of the bypass valve through a third pipeline, and a second valve port of the bypass valve is communicated with a first pressure source; the first air inlet of the second shuttle valve is communicated with the first pipeline through a seventh pipeline, the working port of the second shuttle valve is connected to the closing position of the half-seal gate valve, the first valve port of the half-seal gate valve is connected to the first valve port of the bypass valve through an eighth pipeline, and the second valve port of the half-seal gate valve is connected to the half-seal gate blowout preventer through a ninth pipeline.
When the shearing gate valve is in the closed position, a first valve port and a second valve port of the shearing gate valve are communicated; the control mechanism controls the first valve port and the second valve port of the induction travel switch to be communicated according to the off-position information, so that an external air source drives the bypass valve to be in an open position and drives the bypass valve to be in an off position, the first valve port and the second valve port of the bypass valve are communicated, the first valve port and the second valve port of the semi-closed gate valve are communicated, the first pressure source outputs first pressure to the shearing gate blowout preventer and the semi-closed gate blowout preventer (namely the first pressure source supplies pressure to hydraulic cylinders of the shearing gate blowout preventer and the semi-closed gate blowout preventer, and the pressure value is a first pressure value), the first pressure drives the semi-closed gate to hold the drill rod to the central position of the blowout preventer, the drill rod is prevented from deviating, and then the first pressure drives the shearing gate to shear the drill rod.
S330, when the required pressure is larger than the first pressure, the linkage execution mechanism drives the logic sequence valve to execute the first operation, and the second pressure source outputs second pressure to the shear ram blowout preventer.
The linkage execution mechanism further comprises a first liquid-gas switch, a liquid inlet of the logic sequence valve is communicated with a second pressure source through a fourth pipeline, a liquid outlet of the logic sequence valve is communicated with a third pipeline through a fifth pipeline, a liquid inlet of the first liquid-gas switch is communicated with the fifth pipeline, a gas inlet of the first liquid-gas switch is communicated with the first pipeline through a sixth pipeline, and a gas outlet of the first liquid-gas switch is communicated with a gas inlet of the logic sequence valve;
when the demand pressure is greater than the first pressure, the linkage actuator drives the logic sequence valve to perform a first operation, and a second pressure source outputs a second pressure to a shear ram blowout preventer, comprising:
the first pressure source conveys working liquid to the liquid inlet of the first liquid-gas switch through a third pipeline and a fifth pipeline, so that the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value, and the gas inlet and the gas outlet of the first liquid-gas switch are communicated;
the external gas source conveys gas to a gas inlet of the logic sequence valve through a first pipeline and a sixth pipeline, so that the gas inlet pressure of the logic sequence valve is larger than a second preset threshold value, the logic sequence valve executes a first operation, a liquid inlet and a liquid outlet of the logic sequence valve are communicated, and a second pressure source outputs second pressure to the shearing ram blowout preventer.
As a preferred embodiment, the valve linkage further comprises a delivery pump and an automatic pressurization mechanism, wherein the delivery pump is used for pressurizing the working fluid and delivering the working fluid into the high-pressure accumulator. The automatic pressurization mechanism is used for starting the delivery pump to realize pressurization of the high-pressure energy accumulator when the output pressure of the high-pressure energy accumulator is smaller than the second pressure.
The automatic supercharging mechanism comprises a power source and a second hydraulic switch, wherein a liquid inlet of the second hydraulic switch is communicated with a second pressure source, a first valve port of the second hydraulic switch is communicated with the power source, a second valve port of the second hydraulic switch is communicated with a power source inlet of the delivery pump, and when the liquid inlet pressure of the second hydraulic switch is larger than a third preset threshold value, the first valve port and the second valve port of the second hydraulic switch are communicated.
The power source may be an air source or a hydraulic source, and is selected according to the type of the delivery pump, for example, when the delivery pump is an air pump, the power source is an air source, and the liquid inlet pressure of the second liquid-gas switch is from the second pressure source, so that the third preset threshold may be set to the second pressure value, or slightly smaller than the second pressure value. When the output pressure of the second pressure source is smaller than the second pressure value, the external air source transmits power to the air pump, so that the air pump works to pressurize the external working liquid and transmit the pressurized working liquid to the high-pressure energy storage device.
EXAMPLE III
The third embodiment discloses a blowout preventer control device, and the valve linkage mechanism is added on the basis of the existing blowout preventer control device.
In addition, the invention also provides a blowout preventer, which is additionally provided with the valve linkage mechanism on the basis of the existing blowout preventer.
The above embodiments are only preferred embodiments of the present invention, and the scope of the embodiments of the present invention should not be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the embodiments of the present invention are within the scope of the claims of the embodiments of the present invention.
Claims (10)
1. A valve linkage comprising a linkage actuator for controlling a bypass valve to be open when a shear ram valve is in a closed position to allow a first pressure source to output a first pressure to a shear ram blowout preventer, a second pressure source, and a logical sequence valve mounted on a conduit between the second pressure source and the shear ram blowout preventer for allowing the second pressure source to output a second pressure to the shear ram blowout preventer when performing a first operation.
2. The valve linkage device according to claim 1, wherein the linkage actuator comprises an inductive travel switch and a first shuttle valve, a first valve port of the inductive travel switch is communicated with an external air source, a second valve port of the inductive travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a control mechanism of the inductive travel switch is matched with the shear gate valve, an liquid inlet of the shear gate blowout preventer is communicated with the first valve port of the shear gate valve, the second valve port of the shear gate valve is communicated with the first valve port of the bypass valve through a third pipeline, and the second valve port of the bypass valve is communicated with a first pressure source;
when the shearing gate valve is in the closed position, the first valve port and the second valve port of the shearing gate valve are communicated, the control mechanism controls the first valve port and the second valve port of the induction travel switch to be communicated, so that an external air source drives the bypass valve to be in the open position, the first valve port and the second valve port of the bypass valve are communicated, and the first pressure source outputs first pressure to the shearing gate plate blowout preventer.
3. The valve linkage device according to claim 2, wherein the linkage actuator further comprises a first hydro-pneumatic switch, the liquid inlet of the logic sequence valve is communicated with a second pressure source through a fourth pipeline, the liquid outlet of the logic sequence valve is communicated with the third pipeline through a fifth pipeline, the liquid inlet of the first hydro-pneumatic switch is communicated with the fifth pipeline, the gas inlet of the first hydro-pneumatic switch is communicated with the first pipeline through a sixth pipeline, and the gas outlet of the first hydro-pneumatic switch is communicated with the gas inlet of the logic sequence valve;
when the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value, the gas inlet and the gas outlet of the first liquid-gas switch are communicated, when the gas inlet pressure of the logic sequence valve is greater than a second preset threshold value, the logic sequence valve executes a first operation, and the liquid inlet and the liquid outlet of the logic sequence valve are communicated.
4. The valve linkage device according to claim 2, wherein the linkage actuator further comprises a second shuttle valve, a first air inlet of the second shuttle valve is communicated with the first pipeline through a seventh pipeline, a working port of the second shuttle valve is connected to a closing position of a half gate valve, a first valve port of the half gate valve is connected to a first valve port of a bypass valve through an eighth pipeline, and a second valve port of the half gate valve is connected to a half gate blowout preventer through a ninth pipeline;
when the shearing gate valve is in the closed position, the control mechanism controls an external air source to drive the bypass valve to be in the closed position through the second shuttle valve, the first valve port and the second valve port of the half-seal gate valve are communicated, and the first pressure source outputs first pressure to the half-seal gate blowout preventer.
5. A valve linkage according to any of claims 1 to 4, wherein the valve linkage further comprises a delivery pump for pressurising and delivering working fluid into the second pressure source.
6. The valve linkage of claim 5, further comprising an automatic pressurization mechanism, wherein the automatic pressurization mechanism comprises a power source and a second hydraulic switch, the inlet of the second hydraulic switch is communicated with a second pressure source, the first port of the second hydraulic switch is communicated with the power source, the second port of the second hydraulic switch is communicated with the power source inlet of the delivery pump, and the first port and the second port of the second hydraulic switch are communicated when the inlet pressure of the second hydraulic switch is greater than a third preset threshold value.
7. A method of achieving pipe shear using the valve linkage of any one of claims 1 to 6, comprising the steps of:
operating the shearing gate valve to be in a closed position;
the linkage executing mechanism controls the bypass valve to be in an open position according to the off-position information, and the first pressure source outputs first pressure to the shear ram blowout preventer;
when the demand pressure is greater than the first pressure, the linkage actuator drives the logic sequence valve to perform a first operation, and the second pressure source outputs a second pressure to the shear ram blowout preventer.
8. The method for shearing the drill pipe as recited in claim 7, wherein the linkage actuator comprises an induction travel switch and a first shuttle valve, a first valve port of the induction travel switch is communicated with an external air source, a second valve port of the induction travel switch is connected to a first air inlet of the first shuttle valve through a first pipeline, a working port of the first shuttle valve is connected to an open position of the bypass valve through a second pipeline, a control mechanism of the induction travel switch is matched with the shear gate valve, an liquid inlet of the shear gate blowout preventer is communicated with the first valve port of the shear gate valve, a second valve port of the shear gate valve is communicated with the first valve port of the bypass valve through a third pipeline, and a second valve port of the bypass valve is communicated with a first pressure source;
the linkage actuating mechanism controls the bypass valve to be in an open position according to the off-position information, and the first pressure source outputs first pressure to the shear ram blowout preventer, and the linkage actuating mechanism comprises:
when the shearing gate valve is in the closed position, a first valve port and a second valve port of the shearing gate valve are communicated;
the control mechanism controls the first valve port and the second valve port of the induction travel switch to be communicated according to the off-position information, so that an external air source drives the bypass valve to be in an open position, the first valve port and the second valve port of the bypass valve are communicated, and the first pressure source outputs first pressure to the shearing ram blowout preventer.
9. The method for shearing the drill pipe as recited in claim 8, wherein the linkage actuator further comprises a first liquid-gas switch, the liquid inlet of the logic sequence valve is communicated with a second pressure source through a fourth pipeline, the liquid outlet of the logic sequence valve is communicated with the third pipeline through a fifth pipeline, the liquid inlet of the first liquid-gas switch is communicated with the fifth pipeline, the gas inlet of the first liquid-gas switch is communicated with the first pipeline through a sixth pipeline, and the gas outlet of the first liquid-gas switch is communicated with the gas inlet of the logic sequence valve;
when the demand pressure is greater than the first pressure, the linkage actuator drives the logic sequence valve to perform a first operation, and a second pressure source outputs a second pressure to a shear ram blowout preventer, comprising:
the first pressure source conveys working liquid to the liquid inlet of the first liquid-gas switch through a third pipeline and a fifth pipeline, so that the liquid inlet pressure of the first liquid-gas switch is greater than a first preset value, and the gas inlet and the gas outlet of the first liquid-gas switch are communicated;
the external gas source conveys gas to a gas inlet of the logic sequence valve through a first pipeline and a sixth pipeline, so that the gas inlet pressure of the logic sequence valve is larger than a second preset threshold value, the logic sequence valve executes a first operation, a liquid inlet and a liquid outlet of the logic sequence valve are communicated, and a second pressure source outputs second pressure to the shearing ram blowout preventer.
10. A control device for a blowout preventer, comprising a valve linkage according to any of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814380.8A CN111852379A (en) | 2020-08-13 | 2020-08-13 | Valve linkage device, drill rod shearing method and blowout preventer control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814380.8A CN111852379A (en) | 2020-08-13 | 2020-08-13 | Valve linkage device, drill rod shearing method and blowout preventer control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111852379A true CN111852379A (en) | 2020-10-30 |
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ID=72969770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010814380.8A Pending CN111852379A (en) | 2020-08-13 | 2020-08-13 | Valve linkage device, drill rod shearing method and blowout preventer control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111852379A (en) |
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2020
- 2020-08-13 CN CN202010814380.8A patent/CN111852379A/en active Pending
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