CN108457610A - Drilling fluid diverter control system and method - Google Patents
Drilling fluid diverter control system and method Download PDFInfo
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- CN108457610A CN108457610A CN201810204697.2A CN201810204697A CN108457610A CN 108457610 A CN108457610 A CN 108457610A CN 201810204697 A CN201810204697 A CN 201810204697A CN 108457610 A CN108457610 A CN 108457610A
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- 238000005553 drilling Methods 0.000 title claims abstract description 214
- 239000012530 fluid Substances 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 52
- 239000002002 slurry Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 93
- 230000008569 process Effects 0.000 description 13
- 238000012545 processing Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 12
- 239000007788 liquid Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000005086 pumping Methods 0.000 description 6
- 230000004224 protection Effects 0.000 description 5
- 230000006837 decompression Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The embodiment of the present application provides a kind of drilling fluid diverter control system and method, wherein the system includes：First passage, second channel and third channel, first passage and second channel are in parallel, first passage and the second end of second channel parallel connection are connected with third channel, first manual throttle valve, the first gas control plug valve, gas control throttle valve, the second gas control plug valve are disposed on first passage, it is also associated with blowdown line between gas control throttle valve and the second gas control plug valve, blowdown line is connected with slurry tank；The second manual throttle valve, third gas control plug valve, the 4th gas control plug valve are disposed on second channel；The 5th gas control plug valve, ball-and-seat are disposed on third channel；The 6th gas control plug valve is provided on blowdown line, since the system includes a plurality of split channel, multiple control valves are set to coordinate a variety of flow-dividing controls again on split channel, thus solve the technical issues of implementation cost present in existing system is high, is of limited application.
Description
Technical field
This application involves oil gas development technology field, more particularly to a kind of drilling fluid diverter control system and method.
Background technology
During oil gas well drilling, usually due to carry out some construction operations, for example, make up a joint or vertical drill column,
It needs to stop slush pump, restarts slush pump after associated construction operation to be done to lay down the pressure in column.Above-mentioned construction
In the process, slush pump stopping can make the drilling fluid in pit shaft remain static, and press and consume without annular circulation, shaft bottom is caused to be pressed
Power often than mud pump startup when circulating fluid it is low, and then be easy there are well kick, leakage, bit freezing, gas cut etc. safety it is hidden
Suffer from.
In order to prevent above-mentioned security risk, existing method is to utilize back pressure pumping system and controlled pressure drilling equipment mostly, is provided
Ground drilling liquid recycles, and well head pressure is transferred to shaft bottom, to make up annular circulation pressure consumption, reaches and ensures what bottom pressure was stablized
Effect.But when it is implemented, above-mentioned back pressure pumping system structure itself is complex, job requirement is higher；And due to required
Starting current is larger, generally requires separate configurations power supply system, and implementation cost is also relatively high；In addition, above-mentioned back pressure pumping system
Be of limited application, often cannot be satisfied a variety of different construction targets.In summary, existing system is when it is implemented, past
Toward there is technical issues that complicated, implementation cost is high,.
In view of the above-mentioned problems, currently no effective solution has been proposed.
Invention content
The embodiment of the present application provides a kind of drilling fluid diverter control system and method, to solve to tie existing for existing system
Structure is complicated, implementation cost is high, the technical issues of being of limited application, reach can quickly, be simply directed to a variety of construction targets
The technique effect that corresponding drilling fluid flow-dividing control is carried out to stablize bottom pressure, ensure drilling safety.
The embodiment of the present application provides a kind of drilling fluid diverter control system, including：First passage, second channel and third
Channel, wherein the first of the first passage and second channel parallel connection, the first passage and second channel parallel connection
End is connected with well head, and the second end of the first passage and second channel parallel connection is connected with the third channel, and described the
Triple channel is connected with controlled pressure drilling equipment, wherein：
First manual throttle valve, the first gas control plug valve, gas control throttle valve, second are disposed on the first passage
Gas control plug valve, and it is also associated with blowdown line between the gas control throttle valve and the second gas control plug valve, wherein institute
Blowdown line is stated with slurry tank to be connected；
The second manual throttle valve, third gas control plug valve, the 4th gas control plug valve are disposed on the second channel；
The 5th gas control plug valve, ball-and-seat are disposed on the third channel；
The 6th gas control plug valve is provided on the blowdown line.
In one embodiment, first pressure gauge is provided on the third channel, the first pressure gauge is for surveying
Measure the pressure for the drilling fluid being diverted.
In one embodiment, flowmeter is additionally provided on the third channel, the flowmeter is shunted for measuring
The flow of drilling fluid out.
In one embodiment, the system also includes connection structures, and the connection structure is for connecting the drilling well
Standpipe at liquid diverter control system and well head, wherein the connection structure includes put-through channel, the first connection line, second
Connection line, the put-through channel are used to connect the standpipe at slush pump and the well head；First connection line is set to
The put-through channel is close to one end of well head, and first connection line is for connecting the put-through channel and the first passage
With the first end of second channel parallel connection；One end of second connection line is with the put-through channel close to the one of slush pump
End is connected, the other end and third gas control plug valve and the 4th gas control plug valve in the second channel of second connection line
Between pipeline be connected.
In one embodiment, first manual flap type, the 7th gas control cock are disposed on the put-through channel
Valve.
In one embodiment, the second manual flat valve, second connection are provided in first connection line
Third manual flat valve is provided on circuit.
In one embodiment, it is provided with second pressure gauge on the standpipe.
In one embodiment, the controlled pressure drilling equipment is also connected with the rotating control assembly of well head.
In one embodiment, it is also disposed between the rotating control assembly and the controlled pressure drilling equipment
Hydraulic control flap type, the 4th manual flat valve.
The embodiment of the present application also provides a kind of drilling fluid flow-dividing control methods, including：
According to construction target, by controlling the first gas control plug valve, the second gas control plug valve, third gas control cock respectively
Valve, the 4th gas control plug valve, the 5th gas control plug valve, the 6th gas control plug valve are turned on and off, and adjust the gas control throttling
The aperture of valve, to carry out drilling fluid shunting, wherein the construction target includes at least one of：Filling pipeline, drilling are followed
Ring completes ground cycle, completes pit shaft cycle, standpipe pressure release.
In one embodiment, described by controlling the respectively in the case where the construction target is filling pipeline
One gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control plug valve, the 6th
Gas control plug valve is turned on and off, and adjusts the aperture of the gas control throttle valve, to carry out drilling fluid shunting, including：
Open the first gas control plug valve, the second gas control plug valve, the 6th gas control plug valve, close third gas control plug valve,
4th gas control plug valve, the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is standard-sized sheet, to carry out and filling pipeline phase
The drilling fluid shunting answered.
In one embodiment, in the case where the construction target is drilling cycle, by controlling the first gas respectively
Control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control plug valve, the 6th gas control
Plug valve is turned on and off, and adjusts the aperture of the gas control throttle valve, to carry out drilling fluid shunting, including：
Open the second gas control plug valve, close the first gas control plug valve, third gas control plug valve, the 4th gas control plug valve,
5th gas control plug valve, the 6th gas control plug valve, and the aperture for adjusting gas control throttle valve is half-open, to carry out and creep into cycle phase
The drilling fluid shunting answered.
In the embodiment of the present application, due to consideration that the construction characteristic of controlled pressure drilling operation and requirement, are provided with a plurality of point
Circulation road, and again provided with multiple control valves to coordinate flow-dividing control corresponding with a variety of construction targets on split channel so that
When carrying out the construction target such as creeping into, can drilling-fluid circulation system quickly, be smoothly switched to pit shaft cycle；It is being connect
It is single or make a trip etc. construction target when, can drilling-fluid circulation system quickly, be smoothly switched to ground cycle, with stabilization
Pressure environment, to solve present in existing system it is complicated, implementation cost is high, the technology that is of limited application is asked
Topic, reach can quickly, simply be directed to a variety of construction targets corresponding drilling fluid flow-dividing control of progress with stablize bottom pressure,
Ensure the technique effect of drilling safety.
Description of the drawings
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments described in application, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the composed structure schematic diagram of the drilling fluid diverter control system provided according to the application embodiment；
Fig. 2 is the drilling fluid diverter control system provided using the application embodiment in a Sample Scenario and method
The schematic diagram of flow shunt and pressure control when making up a joint；
Description of the drawings：
1, slurry tank, 2, slush pump, 3, first manual flap type, the 4, the 7th gas control plug valve, the 5, second manual flat valve,
6, third manual flat valve, 7, second pressure gauge, 8, rotating control assembly, 9, hydraulic control flap type, the 10, the 4th manual flat valve,
11, first manual throttle valve, the 12, second manual throttle valve, 13, third gas control plug valve, the 14, first gas control plug valve, 15,
Four gas control plug valves, 16, gas control throttle valve, the 17, second gas control plug valve, the 18, the 6th gas control plug valve, the rotation of the 19, the 5th gas control
Plug valve, 20, first pressure gauge, 21, flowmeter, 22, ball-and-seat, 23, controlled pressure drilling equipment, 24, drilling well, 1001, connection structure.
Specific implementation mode
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with the application reality
The attached drawing in example is applied, technical solutions in the embodiments of the present application is clearly and completely described, it is clear that described implementation
Example is merely a part but not all of the embodiments of the present application.Based on the embodiment in the application, this field is common
The every other embodiment that technical staff is obtained without making creative work should all belong to the application protection
Range.
In view of existing drilling fluid diverter control system, due to relying on back pressure pumping system mostly, cooperation controlled pressure drilling is set
It is standby to carry out drilling fluid flow-dividing control, and back pressure pumping system structure itself is complex, job requirement is higher；And required startup electricity
Flow larger, implementation cost is also relatively high；In addition, limitation of the above-mentioned back pressure pumping system based on this body structure, requirement, application
Range is comparatively limited, can not comprehensively meet different construction targets.In summary, existing system is when it is implemented, past
Toward there is technical issues that complicated, implementation cost is high,.For the basic original for generating above-mentioned technical problem
Cause, the application consider the specific feature of controlled pressure drilling operation, pointedly design and are controlled dedicated for drilling fluid automatic shunt
Structure, specifically, a plurality of split channel can be provided with, and on split channel again provided with multiple control valves with coordinate with it is more
The corresponding flow-dividing control of kind construction target, it is complicated, real present in existing system to solve with steady pressure environment
Of high cost, the technical issues of being of limited application is applied, reaches that can quickly, to be simply directed to the progress of a variety of construction targets corresponding
Technique effect of the drilling fluid flow-dividing control to stablize bottom pressure, ensure drilling safety.
Based on above-mentioned thinking thinking, the embodiment of the present application provides a kind of drilling fluid diverter control system.Referring specifically to
The composed structure schematic diagram of the drilling fluid diverter control system shown in FIG. 1 provided according to the application embodiment.The application is real
The drilling fluid diverter control system for applying example offer, can specifically include with lower structure：First passage, second channel and third are logical
Road, wherein the first passage specifically can be in parallel with the second channel, and the first passage and the second channel are in parallel
First end afterwards can be specifically connected with import 24, the other end after the first passage and the second channel parallel connection, i.e., and second
End can specifically be connected with the third channel, and the other end of the third channel specifically can be with 23 phase of controlled pressure drilling equipment
Connect, wherein：
The first passage can specifically be disposed with first-hand along well head 24 to the direction of controlled pressure drilling equipment 23
Dynamic throttle valve 11, the first gas control plug valve 14, gas control throttle valve 16, the second gas control plug valve 17；And in the gas control throttle valve
It can also specifically be connected with blowdown line between 16 and the second gas control plug valve 17, wherein above-mentioned blowdown line specifically may be used
To be connected with slurry tank 1；
The second channel can specifically be disposed with second-hand along well head 24 to the direction of controlled pressure drilling equipment 23
Dynamic throttle valve 12, third gas control plug valve 13, the 4th gas control plug valve 15；
The third channel can specifically be disposed with the 5th gas along well head 24 to the direction of controlled pressure drilling equipment 23
Control plug valve 19, ball-and-seat 22；
The 6th gas control plug valve 18 can be specifically provided on the blowdown line.
In the present embodiment, above-mentioned gas control plug valve specifically can be used for automatically controlling the on-off in channel.Gas control section
Stream valve specifically can be used for cleaner for high-pressure drilling fluid pressure release into low-pressure drilling liquid.It can be used for when ball-and-seat is specifically used so that drilling well
Liquid prevents drilling fluid return according to the flowing of regulation direction.
In the present embodiment, when it is implemented, generally requiring that there are a drilling wells carrying out the during of normally creeping into
Fluid circulation.Above-mentioned drilling-fluid circulation system can specifically include the following contents：By slush pump 2 by the drilling well in slurry tank 1
Liquid is pumped into shaft bottom through the standpipe at well head 24, and drilling fluid, can be by mineshaft annulus by rotating control assembly 8 after pit shaft recycles
Ground is returned to, controlled pressure drilling equipment 23 is finally entered, to complete the cycle of drilling fluid.And works as and made up a joint or made a trip
When etc. other kinds of construction, it is not usually required to drilling fluid input well bottom, is required at this time by the drilling fluid under script input well
It branches to ground and forms cycle, to construct accordingly, that is, the pit shaft cyclic switching by script is needed to be recycled for ground.In this way,
Pressure oscillation can be caused to generate security risk to avoid start and stop slush pump 1.In addition, it is above-mentioned apply during in order to ensure implementation process
Safety, it is desirable that switched over using switching mode as stable as possible, with steady pressure environment, reduce well kick, leakage, card
The safety accidents odds such as brill, gas cut.For above-mentioned condition of construction, drilling fluid flow-dividing control provided by the embodiments of the present application
System includes：First passage, second channel, third channel, and multiple gas control cocks are respectively provided on above-mentioned channel
The various controls valves such as valve, gas control throttle valve, manual throttle valve can be according to specific so as to when carrying out different type construction
Construction characteristic is led to by adjusting the gas control plug valve on channel, gas control throttle valve flexible combination using above-mentioned first passage, second
Road, third channel, formed with the corresponding bypass line of construction target, so as to by the bypass line targetedly
The switching that the circulation pattern of drilling-fluid circulation system quickly, is smoothly carried out according to construction characteristic, to meet a variety of different constructions
The construction requirement of target.In addition, above-mentioned drilling-fluid circulation system is additionally provided with blowdown line, in the case of higher pressure and
Shi Jinhang decompression protections further improve the degree of safety and stability of drilling process.
It in the present embodiment, when it is implemented, can be logical in first passage, second channel, third by adjusting setting
Unlatching, closing and the opening degree of the difference control valve such as gas control plug valve, gas control throttle valve, manual throttle valve on road, adjustment
Concrete structure and working condition based on the bypass line that above-mentioned first passage, second channel, second channel are composed.To
Can be according to specific construction target the characteristics of can be reached, be targetedly adjusted flexibly bypass line carry out it is steady, quickly
Drilling-fluid circulation system circulation pattern switching.
In one embodiment, it is followed in order to which drilling fluid diverter control system is preferably accessed original drilling fluid
In loop system, when it is implemented, considering the structure feature of original drilling-fluid circulation system, above-mentioned drilling fluid flow-dividing control
The structure feature of system and specific drilling technology, above system can also include specifically connection structure 1001, state connection knot
Structure 1001 specifically can be used for connecting the standpipe at the drilling fluid diverter control system and well head 24, i.e., by above-mentioned drilling fluid point
Flow control system accesses original drilling-fluid circulation system, so as to preferably be carried out with above-mentioned drilling fluid diverter control system
The switching of circulation of drilling fluid pattern.
In one embodiment, when it is implemented, the other end of above-mentioned third channel can specifically be set with controlled pressure drilling
Standby 23 are connected.Wherein, the 5th gas control plug valve 19 on third channel specifically can be used for controlling third channel and controlled pressure drilling
Connection line between equipment 23 is turned on or off.Specifically, being needed drilling-fluid circulation system when according to construction target
When circulation pattern is switched to ground mode by pit shaft pattern, it is logical that third can be opened by opening the 5th gas control plug valve 19
Road adjusts the relevant control valve on other channels so that the drilling fluid for flowing into pit shaft originally does not flow into well head 24, but flows through
Controlled pressure drilling equipment 23 is finally flowed into through second outlet after third channel behind other channels, completes ground cycle.
In one embodiment, the 6th gas control plug valve 18, and above-mentioned blowdown line are provided on above-mentioned blowdown line
One end be connected with the position between gas control throttle valve 16 and the second gas control plug valve 17, the other end and mud of above-mentioned blowdown line
Stock pump 1 is connected.Using above-mentioned blowdown line, in the case where pressure is larger, the 6th gas control plug valve 18 can be opened to open
Blowdown line so that drilling fluid can quickly return to slurry tank 1 through first outlet by blowdown line, so as to effectively drop
Pressure in low system ensures construction safety.
In one embodiment, when it is implemented, the gas control of suitable dimension can be selected according to the discharge capacity of slush pump 2
Throttle valve is as above-mentioned gas control throttle valve 16.Specifically, in the case where the discharge capacity of slush pump 2 is less than or equal to 30L/s, Ke Yixuan
Select the gas control throttle valve 16 that 2 cun of gas control throttle valve is used as this system；It is more than 30L/s in the discharge capacity of slush pump 2, and is less than
In the case of equal to 30L/s, gas control throttle valve 16 that 3 cun of gas control throttle valve can be selected to be used as this system.And have
When gymnastics is made, the aperture of the gas control throttle valve 16 can be reasonably controlled according to the discharge capacity of Specific construction situation, such as slush pump
From the fully closed time for becoming standard-sized sheet, in this way in carrying out the handoff procedure of circulation pattern of drilling-fluid circulation system, well can be allowed
High pump pressure when cylinder cycle is smoothly down to the low pump pressure of ground cycle, prevents the safety accident that rapid pressure fluctuation generates.
In one embodiment, the connection structure 1001 can specifically include with lower structure：Put-through channel, first connect
Link, the second connection line.Wherein, the put-through channel specifically can be used for connecting slush pump 2 and the well head 24；It is described
First connection line can specifically be set to the put-through channel close to one end of well head 24, and first connection line specifically may be used
For connecting the first end (i.e. first entrance) of the put-through channel and the first passage and second channel parallel connection；Institute
The one end for stating the second connection line is connected with the put-through channel close to one end (i.e. third entrance) of slush pump 2, and described second
Pipeline position in the other end of connection line, with the second channel between third gas control plug valve and the 4th gas control plug valve
I.e. second entrance is connected.According to above-mentioned connection type, can above-mentioned drilling fluid diverter control system preferably be accessed into drilling well
Liquid follows bad system, so as to give full play to the shunting effect of above-mentioned drilling fluid diverter control system.
It in one embodiment, when it is implemented, can also be in above-mentioned put-through channel upper edge slush pump 2 to well head 24
First manual flap type 3, the 7th gas control plug valve 4 are set gradually on direction, so as to according to construction requirement, opening in time or
The put-through channel being connected with import 24 is closed, to control the drilling fluid for flowing into well head 24.
It in one embodiment, can be by drilling fluid when it is implemented, when carrying out the construction of project objective such as creeping into
The circulation pattern of the circulatory system is switched to pit shaft pattern, at this moment can open first manual flap type 3, the 7th gas control plug valve 4,
To open above-mentioned put-through channel.To, drilling fluid can pass through put-through channel, and well head 24 is flowed into from third outlet through standpipe, into
Enter pit shaft cycle.
In one embodiment, it is put down manually when it is implemented, second can also be arranged in above-mentioned first connection line
Plate valve 5.Wherein, the specific on and off that can be used for controlling the first connection line of second manual flat valve 5, so as to
To control the drilling fluid for entering first passage and second channel through first entrance by the first connection line.
In one embodiment, it is put down manually when it is implemented, third can also be arranged in above-mentioned second connection line
Plate valve 6.Wherein, the specific on and off that can be used for controlling the second connection line of the third manual flat valve 6, so as to
To control the drilling fluid entered through second entrance by the second connection line.
In one embodiment, when it is implemented, one end of above-mentioned controlled pressure drilling equipment 23 specifically can be with well head 24
Rotating control assembly 8 at position is connected.Using above structure, the drilling fluid in pit shaft can be returned through rotating control assembly 8
Ground finally enters controlled pressure drilling equipment 23, to complete circulation of drilling fluid.
It in one embodiment, when it is implemented, can also be between controlled pressure drilling equipment 23 and rotating control assembly 8
Connection line upper edge well head 24 to the direction of controlled pressure drilling equipment 23 set gradually hydraulic control flap type 9, the 4th manual flat valve
10.In this way, when it is implemented, can be turned on and off by adjusting hydraulic control flap type 9, the 4th manual flat valve 10, to adjust
Connection line between whole controlled pressure drilling equipment 23 and rotating control assembly 8 is turned on or off, so as to preferably coordinate
Carry out the switching of circulation of drilling fluid pattern.
In one embodiment, the construction target by circulation of drilling fluid pattern switching for ground mode is being needed
When, it specifically can be by controlling the first gas control plug valve 12, the second gas control plug valve 17, third gas control plug valve 13, the 4th gas
Control plug valve 15, the 5th gas control plug valve 19, the 6th gas control plug valve 18, the 7th gas control plug valve 4 and first manual flap type 3
Be turned on and off, and adjust the aperture of the gas control throttle valve 16, it is adjustment first passage, second logical to close put-through channel
The former drilling fluid for flowing into well head 24 is branched to ground by the structure for the bypass line that road, third channel are combined into, with smoothly complete
At the switching of ground circulation pattern.It is similar, needed the construction mesh by circulation of drilling fluid pattern switching for downhole modes
It, specifically can be by controlling the first gas control plug valve 12, the second gas control plug valve 17, third gas control plug valve the 13, the 4th when mark
Gas control plug valve 15, the 5th gas control plug valve 19, the 6th gas control plug valve 18, the 7th gas control plug valve 4 and first manual tablet
Valve 3 is turned on and off, and adjusts the aperture of the gas control throttle valve 16, to open put-through channel so that first passage, second
The bypass line that channel, third channel combine is closed, so as to which drilling fluid is inputted well head 24, with smoothly complete
At the switching of pit shaft circulation pattern.In above-mentioned regulation process, specifically it can regulate and control relief tube according to the pressure condition in system
The 6th gas control plug valve 18 on line, in order in the case where system pressure is excessive, open blowdown line in time, to be
Drilling fluid in system can quickly move through blowdown line inflow slurry tank 1 and achieve the effect that decompression protection, further improve
Degree of safety in drilling process and stability.
In the embodiment of the present application, compared to existing apparatus, due to consideration that the construction characteristic of controlled pressure drilling operation and wanting
It asks, is provided with a plurality of split channel, and again corresponding with a variety of construction targets to coordinate provided with multiple control valves on split channel
Flow-dividing control so that when creep into etc. construction target, quickly, smoothly by drilling-fluid circulation system can be switched to well
Cylinder cycle；When the construction target such as being made up a joint or being made a trip, can quickly, smoothly by drilling-fluid circulation system be switched to
Ground recycles, with steady pressure environment, to solve present in existing system it is complicated, implementation cost is high, using model
The technical issues of being with limit, reaching, which quickly, to be simply directed to a variety of construction targets, carries out corresponding drilling fluid flow-dividing control
With the technique effect stablized bottom pressure, ensure drilling safety.
In one embodiment, when it is implemented, being specifically also provided with first pressure gauge on above-mentioned third channel
20, the first pressure gauge 20 specifically can be used for measuring the pressure for the drilling fluid that bypass line is diverted.Subsequently may be used
With using the pressure of the measured drilling fluid being diverted as reference, more accurately adjust first passage, second channel,
Respective valves on third channel preferably carry out the circulation pattern switching of drilling-fluid circulation system.
In one embodiment, when it is implemented, being specifically also provided with flowmeter 21 on above-mentioned third channel, institute
State the specific flow that can be used for measuring the drilling fluid that bypass line distributes of flowmeter 21.It is measured can subsequently to utilize
The drilling fluid being diverted flow as reference, more accurately adjust first passage, second channel, on third channel
Respective valves preferably carry out the circulation pattern switching of drilling-fluid circulation system.
In one embodiment, above-mentioned flowmeter 21 can be specifically a kind of electromagnetic flowmeter.Utilize above-mentioned electromagnetic current
Gauge can more accurately measure the specific flow for the drilling fluid that bypass line distributes.
In one embodiment, when it is implemented, can also be between above-mentioned connection structure 1001 and well head 24 it is vertical
Second pressure gauge 7 is set on pipe.Wherein, above-mentioned second pressure gauge 7 is specific can be used for measuring the pressure into the drilling fluid of well head
Power, the pressure can subsequently to utilize the above-mentioned drilling fluid into well head as reference, instruct to adjust above-mentioned drilling fluid shunting
Control system reaches the circulation pattern switching for preferably carrying out drilling-fluid circulation system.
In one embodiment, it is being by pit shaft cyclic switching by circulation of drilling fluid using drilling fluid diverter control system
When ground recycles, the difference for the pressure that can be measured with first pressure gauge 20 according to second pressure gauge 7 determines that the flow of shunting is big
It is small.Specifically for example, if bypass flow is too small, the pressure difference numerical value of above-mentioned two pressure gauge measured can be relatively large,
Lead to not normally-open 4th gas control plug valve 15, and then it is possible that high pressure thorn leakage.Generally for guarantee gas control cock
Valve can it is normally-open, close, it is desirable that the difference of above-mentioned pressure be no more than 7MPa.
It can be seen from the above description that drilling fluid diverter control system provided by the embodiments of the present application, due to considering
Construction characteristic to controlled pressure drilling operation and requirement are provided with a plurality of split channel, and are provided with multiple controls on split channel again
Valve processed is to coordinate flow-dividing control corresponding with a variety of construction targets so that, can be quick, flat when carrying out the construction target such as creeping into
Drilling-fluid circulation system is quietly switched to pit shaft cycle；When the construction target such as being made up a joint or being made a trip, can quickly,
Drilling-fluid circulation system is smoothly switched to ground cycle, with steady pressure environment, is existed to solve in existing system
It is complicated, implementation cost is high, the technical issues of being of limited application, reach can quickly, be simply directed to a variety of constructions
Target carries out corresponding drilling fluid flow-dividing control with the technique effect stablized bottom pressure, ensure drilling safety；Further through
Blowdown line is connected on one channel, to carry out decompression protection, improves the safety of wellbore construction；Also by pointedly designing
Connection structure connects the well head of drilling fluid diverter control system and control to be shunted, and drilling fluid flow-dividing control system can be coordinated by reaching
System accurately and efficiently carries out the technique effect of drilling fluid shunting.
It is additionally provided in the embodiment of the present application and a kind of carrying out drilling fluid flow-dividing control using drilling fluid diverter control system
Method, as described in the following examples.The principle and drilling fluid flow-dividing control solved the problems, such as due to drilling fluid flow-dividing control method
System is similar, therefore the implementation of drilling fluid flow-dividing control method may refer to the implementation of drilling fluid diverter control system, repetition
Place repeats no more.Drilling fluid flow-dividing control specifically can be carried out using drilling fluid diverter control system shown in FIG. 1.Specific implementation
Process may include the following contents：It, can be by controlling the first gas control plug valve 14, the rotation of the second gas control respectively according to construction target
Plug valve 17, third gas control plug valve 13, the 4th gas control plug valve 15, the 5th gas control plug valve 19, the 6th gas control plug valve 18
It is turned on and off, adjusts the aperture of the gas control throttle valve 16, to carry out drilling fluid shunting, so as to reach according to construction mesh
Target construction characteristic and requirement, switching that is steady, safely carrying out circulation of drilling fluid pattern.
In one embodiment, when it is implemented, the construction target can specifically include at least one of：Filling
Pipeline, drilling cycle, completion ground cycle, completion pit shaft cycle, standpipe pressure release etc..Certainly, it should be noted that above-mentioned listed
The a variety of construction targets lifted are intended merely to that the application embodiment is better described.When it is implemented, can also be according to specific feelings
Condition and construction requirement introduce other constructions in addition to above-mentioned cited construction target as construction target, utilize the application
The drilling fluid diverter control system that embodiment provides can also carry out corresponding drilling fluid shunting.
In one embodiment, described to pass through when it is implemented, in the case where the construction target is filling pipeline
The first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control are controlled respectively
Plug valve, the 6th gas control plug valve are turned on and off, and adjust the aperture of the gas control throttle valve, to carry out drilling fluid shunting,
It can specifically include the following contents：It opens the first gas control plug valve, the second gas control plug valve, the 6th gas control plug valve, closes the
Three gas control plug valves, the 4th gas control plug valve, the 5th gas control plug valve, and adjust gas control throttle valve aperture be standard-sized sheet, with into
Row drilling fluid shunting corresponding with filling pipeline.Furthermore, it is possible to keep first manual flap type, the second manual flat valve, third
Manual flat valve is in normally open, opens the 7th gas control plug valve, keeps the first gas control throttle valve, the second gas control throttle valve not
Become.The drilling fluid shunting processing for the construction target of filling pipeline can be completed in the manner described above so that gas control throttle valve
Pipeline afterwards is full of.
In one embodiment, when it is implemented, in the case where the construction target is drilling cycle, pass through difference
Control the first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control cock
Valve, the 6th gas control plug valve are turned on and off, and adjust the aperture of the gas control throttle valve, to carry out drilling fluid shunting, specifically
It may include the following contents：The second gas control plug valve is opened, the first gas control plug valve, third gas control plug valve, the 4th gas are closed
Control plug valve, the 5th gas control plug valve, the 6th gas control plug valve, and adjust gas control throttle valve aperture be it is half-open, with carry out with
Drilling recycles corresponding drilling fluid shunting.Furthermore, it is possible to keep first manual flap type, the second manual flat valve, third manual
Flap type is in normally open, opens the 7th gas control plug valve, keeps the first gas control throttle valve, the second gas control throttle valve constant.
The drilling fluid shunting processing for the construction target of drilling cycle can be completed in the manner described above so that voltage-controlled drilling well is isolated and sets
It is standby.
It in one embodiment, can be with when it is implemented, in the case where preparing before the construction target is to make up a joint
It operates in the following way：Close the first gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the rotation of the 6th gas control
Plug valve opens the second gas control plug valve, the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is adjusted to complete by gradually closing
It closes.Furthermore, it is possible to which first manual flap type, the second manual flat valve, third manual flat valve is kept to be in normally open, open
7th gas control plug valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can complete to be directed in the manner described above
The drilling fluid shunting of the construction target prepared before making up a joint is handled so that the pipeline after gas control throttle valve is unobstructed.
It in one embodiment, can be with when it is implemented, in the case where the construction target is to be transferred to automatic shunt
It operates in the following way：Third gas control plug valve, the 4th gas control plug valve, the 6th gas control plug valve are closed, the first gas is opened
Plug valve, the second gas control plug valve, the 5th gas control plug valve are controlled, and the aperture for adjusting gas control throttle valve is adjusted to complete by gradually closing
It closes.Furthermore, it is possible to which first manual flap type, the second manual flat valve, third manual flat valve is kept to be in normally open, open
7th gas control plug valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can complete to be directed in the manner described above
It is transferred to the drilling fluid shunting processing of the construction target of automatic shunt so that shunt pressure and stream that can be preferably in observation system
Amount.
It in one embodiment, can be with when it is implemented, in the case where the construction target is to complete ground to recycle
It is operated according in a manner of：Third gas control plug valve, the 6th gas control plug valve are closed, the first gas control plug valve, the second gas control are opened
Plug valve, the 4th gas control plug valve, the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is standard-sized sheet.Furthermore, it is possible to protect
It holds first manual flap type, the second manual flat valve, third manual flat valve and is in normally open, open the 7th gas control cock
Valve keeps the first gas control throttle valve, the second gas control throttle valve constant.Applying for ground cycle can be completed in the manner described above
The drilling fluid shunting of work target is handled so that drilling fluid is transferred to ground completely.
It in one embodiment, can be according to when it is implemented, in the case where the construction target is standpipe release
It is operated in a manner of：The second gas control plug valve, third gas control plug valve are closed, the first gas control plug valve, the 4th gas control cock are opened
Valve, the 5th gas control plug valve, the 6th gas control plug valve, and the aperture for adjusting gas control throttle valve is standard-sized sheet.Furthermore, it is possible to keep
One manual flat valve, the second manual flat valve, third manual flat valve are in normally open, close the 7th gas control plug valve, protect
It is constant to hold the first gas control throttle valve, the second gas control throttle valve.The construction mesh for standpipe release can be completed in the manner described above
Target drilling fluid shunting is handled so that can lay down the pressure of lift line.
It in one embodiment, can be according to when it is implemented, in the case of the construction target is to make up a joint
It is operated in a manner of：The first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 6th gas control plug valve are closed, is beaten
The 4th gas control plug valve, the 5th gas control plug valve are opened, and the aperture for adjusting gas control throttle valve becomes half-open from gradually closing.In addition, can
To keep first manual flap type, the second manual flat valve, third manual flat valve to be in normally open, the rotation of the 7th gas control is closed
Plug valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can complete to be directed to when making up a joint in the manner described above
The drilling fluid shunting processing for target of constructing.After the pressure value that second pressure gauge measures becomes 0, you can to carry out order root application
Work.
It in one embodiment, can when it is implemented, in the case where the construction target is to switch back into standpipe access
It is operated by according in a manner of：The first gas control plug valve, the second gas control plug valve, the 6th gas control plug valve are closed, third gas is opened
The aperture controlled plug valve, the 4th gas control plug valve, the 5th gas control plug valve, and adjust gas control throttle valve is half-open.Furthermore, it is possible to
It keeps first manual flap type, the second manual flat valve, third manual flat valve to be in normally open, closes the 7th gas control cock
Valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can complete in the manner described above logical for standpipe is switched back into
The drilling fluid shunting of the construction target on road is handled, to increase wellhead back pressure.
In one embodiment, when it is implemented, in the case where the construction target is shunting vertical tube pressure equilibrium,
It can be operated according in a manner of：The first gas control plug valve, the second gas control plug valve, the 6th gas control plug valve are closed, third is opened
Gas control plug valve, the 4th gas control plug valve, the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is half-open.In addition, can
To keep first manual flap type, the second manual flat valve, third manual flat valve to be in normally open, the rotation of the 7th gas control is opened
Plug valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can be completed in the manner described above for shunting standpipe pressure
The drilling fluid shunting of the construction target of dynamic balance is handled, so as to clearly observe standpipe pressure and shunt pressure.
It in one embodiment, can be with when it is implemented, in the case where the construction target is to complete pit shaft cycle
It is operated according in a manner of：Close the first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control cock
Valve, the 6th gas control plug valve open the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is half-open.Furthermore, it is possible to protect
It holds first manual flap type, the second manual flat valve, third manual flat valve and is in normally open, open the 7th gas control cock
Valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can be completed in the manner described above for completion pit shaft cycle
Construction target drilling fluid shunting processing, to reduce wellhead back pressure.
It in one embodiment, can be with when it is implemented, in the case where the construction target is isolation diverter
It is operated according in a manner of：Close the first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control cock
Valve, the 5th gas control plug valve, the 6th gas control plug valve, and the aperture for adjusting gas control throttle valve is half-open.Furthermore, it is possible to keep
One manual flat valve, the second manual flat valve, third manual flat valve are in normally open, open the 7th gas control plug valve, protect
It is constant to hold the first gas control throttle valve, the second gas control throttle valve.Applying for isolation diverter can be completed in the manner described above
The drilling fluid shunting of work target is handled so that drilling fluid returns to ground by pit shaft completely.
It in one embodiment, can be with when it is implemented, in the case where the construction target is diverter release
It is operated according in a manner of：Close the first gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control cock
Valve opens the second gas control plug valve, the 6th gas control plug valve, and the aperture for adjusting gas control throttle valve is half-open.Furthermore, it is possible to protect
It holds first manual flap type, the second manual flat valve, third manual flat valve and is in normally open, open the 7th gas control cock
Valve keeps the first gas control throttle valve, the second gas control throttle valve constant.It can complete to be directed to diverter release in the manner described above
Construction target drilling fluid shunting processing, the diverter (i.e. bypass line) in drilling fluid diverter control system is let out
Pressure processing.
Each embodiment in this specification is described in a progressive manner, identical similar portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so description is fairly simple, related place is referring to embodiment of the method
Part explanation.
It should be noted that system, device, module or unit that the above embodiment illustrates, it specifically can be by computer
Chip or entity are realized, or are realized by the product with certain function.For convenience of description, in the present specification, it retouches
It is divided into various units when stating apparatus above with function to describe respectively.It certainly, when implementing the application can be the function of each unit
It realizes in the same or multiple software and or hardware.
In addition, in the present specification, such as adjective as first and second can be only used for an element or move
Make to distinguish with another element or action, without requiring or implying any actual this relationship or sequence.Permit in environment
Perhaps in the case of, one in only element, component or step is should not be interpreted as limited to reference to element or component or step (s)
It is a, and can be one or more of element, component or step etc..
It can be seen from the above description that drilling fluid flow-dividing control method provided by the embodiments of the present application, due to considering
Construction characteristic to controlled pressure drilling operation and requirement, it is more by using a plurality of split channel, and using what is be arranged on split channel
A control valve coordinates flow-dividing control corresponding with a variety of construction targets so that, can be fast when carrying out the construction target such as creeping into
Speed, smoothly by drilling-fluid circulation system be switched to pit shaft cycle；It, can be with when the construction target such as being made up a joint or being made a trip
Quickly, drilling-fluid circulation system is smoothly switched to ground cycle, with steady pressure environment, to solve in existing method
Existing process is complicated, implementation cost is high, the technical issues of being of limited application, reach can quickly, simply be directed to it is a variety of
Construction target carries out corresponding drilling fluid flow-dividing control with the technique effect stablized bottom pressure, ensure drilling safety；Further through
Using setting, connection blowdown line carries out decompression protection on the first pass, improves the safety of wellbore construction；Also pass through profit
The well head of drilling fluid diverter control system and control to be shunted is connected with the connection structure of targeted design, bench drill can be matched by reaching
Well liquid diverter control system accurately and efficiently carries out the technique effect of drilling fluid shunting.
It is embodied in Sample Scenario at one, using drilling fluid diverter control system provided by the embodiments of the present application and side
Method carries out flow-dividing control to the drilling fluid of the different construction stages in certain work area drilling process.Specific implementation process can refering to
Lower content executes.
In the present embodiment, it can complete to bore referring initially to the concrete structure of drilling fluid diverter control system shown in FIG. 1
The assembling of well liquid diverter control system, and above-mentioned drilling fluid diverter control system is connected to well head.Wherein, above-mentioned drilling fluid point
Flow control system is referred to as drilling fluid automatic shunt control device system, including fixed shunting connection system (connects
Structure) 1001 and automatic shunt manifold system (i.e. bypass line) 1002.Wherein, above-mentioned fixed shunting connection system 1001 has
Body may be mounted on the pipeline of the standpipe at slush pump 2 to well head 24, can specifically be shunted by a put-through channel and two
Channel (i.e. the first connection line and the second connection line) form, with external connection need to by an entrance (i.e. third entrance) with
And three outlets.Wherein, put-through channel is composed in series by first manual flap type 3 and the 7th gas control plug valve 4.Specifically, the
The outside of one manual flat valve 3 is entrance (i.e. third entrance), is connected with slush pump 2；The outside of 7th gas control plug valve 4 is
Three outlets, are connected with standpipe；Two split channels are separately installed with the second manual flat valve 5, third manual flat valve 6, wherein
The outside of second manual flat valve 5 is one outlet, is connected with the first entrance of automatic shunt manifold system, third manual platform
The outside of valve 6 is one outlet, is connected with the second entrance of automatic shunt manifold system.
In the present embodiment, above-mentioned automatic shunt manifold system specifically may be mounted at fixed shunting connection system
Position between 1001 and controlled pressure drilling equipment (i.e. controlled pressure drilling equipment) 23.Wherein, there are two entrances for the diverter system
(i.e. first entrance and second entrance), two outlets (i.e. first outlet and second outlet).Specifically, can by first entrance into
Enter there are two channel (i.e. first passage and second channel), first manual throttle valve 11, first is disposed on first passage
Gas control plug valve 14, gas control throttle valve 16 and the second gas control plug valve 17.The second manual throttle is disposed on second channel
Valve 12, third gas control plug valve 13 and the 4th gas control plug valve 15.Second entrance is revolved with third gas control plug valve 13, the 4th gas control
Plug valve 15 is connected.One blowdown line is installed, on the blowdown line between gas control throttle valve 16 and the second gas control plug valve 17
It is provided with the 6th gas control plug valve 18, which is connected to slurry tank 1 through first outlet.4th gas control plug valve 15 and
Pipeline after two gas control plug valves 17 converges to a pipeline (i.e. third channel), through first pressure gauge 20, electromagnetic flowmeter 21,
Through second outlet after 5th gas control plug valve 19, ball-and-seat 22, finally it is connect with controlled pressure drilling equipment 23.
In the present embodiment, after the good above system of assembly and connection, when specific operation, in working conditions such as pressure control drillings
Under (target of constructing), by slush pump 2 from 1 pump drilling fluid of slurry tank, and it is pumped to fixed shunting connection system 1001
Third entrance, the connection system (i.e. connection structure) tool there are three outlet, wherein outlet one and outlet two be respectively connected to from
The first entrance and second entrance of dynamic diverter system, third outlet are connected to standpipe, and drilling fluid is by standpipe through drill string water
Eye is input to shaft bottom, then is upwardly into rotating control assembly 8 along annular space and returns to ground, through hydraulic control flap type 9 and the 4th manual platform
Valve 10, into controlled pressure drilling equipment 23；Automatic shunt manifold system has two outlet lines, one is blowdown line, relief tube
Line is connected with slurry tank 1, the second is (i.e. third channel, third channel combine shunting export pipeline with first passage, second channel
At complete bypass line), it is connected with controlled pressure drilling equipment 23.The fixed shunting connection system 1001 specifically can be used for
The drilling fluid that slush pump 2 is pumped is transported to shaft bottom in normal drilling, by standpipe, establishes more complete drilling fluid pit shaft
It recycles (the pit shaft circulation pattern i.e. in drilling-fluid circulation system)；It making up a joint, making a trip, replacing rotating control assembly glue core etc.
When not needing drilling fluid and being pumped into shaft bottom, slush pump 2 is pumped out into flow, controlled pressure drilling dress is diverted to by automatic shunt manifold system
Standby 23, (i.e. the ground circulation pattern of drilling-fluid circulation system) is recycled to establish ground, to carry out controlled pressure drilling operation.
In the present embodiment, it should be noted that be gas control plug valve used by above system, be on the one hand because
Above system can be installed near well head 24, and air source can be used as power source, gas control plug valve be comparatively suitable for into
The explosion-proof control of row.On the other hand it is also to have keying rapid, light relative to other kinds of control valve because of gas control plug valve,
It is simple in structure, the advantages that volume is relatively small, and it is integrated after the volume of system relatively simplify, reliability, stability are relatively high.
Drilling fluid flow-dividing control provided by the embodiments of the present application system is being utilized for different construction operating modes (target of constructing)
When system carries out corresponding shunting processing, specific implementation process can apply this Shen in conjunction with shown in Fig. 2 in a Sample Scenario
Please the flow shunt and pressure control of embodiment the drilling fluid diverter control system and method that provide when making up a joint schematic diagram,
It is executed refering to the following contents.
Under normal drilling construction operating mode, it is desirable that circulation of drilling fluid pattern recycles for pit shaft, correspondingly, there are following pressures
Relationship：
Ppump_1=Ps_in+Pinner+Pb+Pannular+Pback_1 (1)
Wherein, Ppump_1Pump pressure (unit when drilling can be specifically expressed as：MPa), Ps_inIt can specifically indicate slush pump
It is exported to the pressure consumption of the surface line between well head, PinnerPressure consumption (the unit of drill string hydrophthalmia can be specifically expressed as：MPa), PbTool
Body can be expressed as bit pressuredrop (unit：MPa), PannularMineshaft annulus pressure consumption (unit can be specifically expressed as：MPa),
Pback_1Wellhead back pressure (unit when specifically can be expressed as normally creeping into：MPa).
Under the construction operating mode such as make up a joint, make a trip, the circulation pattern of drilling fluid will be transferred to ground by pit shaft cycle
Cycle, correspondingly, there are following pressures relationships：
Ppump_2=Pback_2+Ps_diverter (2)
Wherein, Ppump_2Pump pressure (unit whens specifically can be expressed as making up a joint, making a trip etc.：MPa), Pback_2Specifically may be used
Wellhead back pressure (unit whens being expressed as making up a joint, making a trip etc.：MPa), Ps_diverterMud can be specifically expressed as to pump out
Surface line pressure between mouth to controlled pressure drilling is equipped consumes (unit：MPa).
Wherein, and there are following relationships：
Pback_2=Pback_1+Pannular。
Thus, it is possible to which releasing the pump pressure variation of slush pump can specifically be expressed as：
ΔPpump=Ppump_1+Ppump_2
I.e.：
ΔPpump=Ps_in+Pinner+Pb-Ps_diverter (3)。
However, again since slush pump is generally in the state to work always, there is a situation where pump impulses to change no
Under, also meet following relationship：
Qpump=const (4).
According to pipeline along journey pressure consumption calculation formula it is found that pressure consumption substantially to by flow it is square directly proportional, therefore
The key that flow pit shaft cycle goes to ground cycle is how to be diverted to the drilling fluid of various flow as far as possible within a short period of time
Ground needs the gas control throttle valve 16 for selecting suitable dimension.In the present embodiment, if considering that the discharge capacity of slush pump exists
When 30L/s or less, 2 cun of throttle valves can be selected as gas control throttle valve；It, can if the discharge capacity of slush pump meets 30-60L/s
To select 3 cun of throttle valves) as gas control throttle valve.And reasonably control the gas control throttle valve by the fully closed time to standard-sized sheet,
High pump pressure when pit shaft can be allowed to recycle steadily is down to the low pump pressure of ground cycle.Wherein, bypass flow when specific operation is big
It is small specifically to be determined according to the difference for the pressure that second pressure gauge 7 and first pressure gauge 20 measure.Specifically, if shunting stream
Measure too small, then the pressure difference numerical value of above-mentioned two pressure gauge measured is relatively large, leads to not normally-open 4th gas control rotation
Plug valve 15, and then it is possible that high pressure thorn leakage.Generally for ensure gas control plug valve can it is normally-open, close, it is desirable that on
The numerical value for stating pressure difference is no more than 7MPa.
It in the present embodiment, when it is implemented, can be by t1→t2Corresponding period is expressed as pit shaft cycle and turns ground and follow
Ring, during which flow is constant, and the aperture of throttle valve is reduced, and wellhead back pressure increases；It can be by t3→t4Corresponding period is expressed as ground
Cycle turns pit shaft cycle, and during which flow is constant, and the aperture of throttle valve increases, and wellhead back pressure is reduced.
In the present embodiment, it is embodied, can be grasped refering to the control valve of drilling fluid diverter control system shown in table 1
Make dial gauge, corresponding control valve is adjusted for different construction operating modes (target of constructing), to utilize above-mentioned flow-dividing control system
System carries out corresponding shunting processing.
The control valve operation instruction table of 1 drilling fluid diverter control system of table
In the present embodiment, it should be noted that：MV in table 1 refers specifically to manual flat valve, wherein code is
3 MV refers specifically to first manual flap type 3, and the MV that code is 5 refers specifically to the second manual flat valve 5, and code is 6
MV refers specifically to third manual flat valve.AV in table refers specifically to gas control plug valve, wherein the AV that code is 4 is specific
What is referred to can be the 7th gas control plug valve 4, and what the AV that code is 13 was referred specifically to can be third gas control plug valve 13, code 14
AV refers specifically to can be the first gas control plug valve 14, what the AV that code is 15 was referred specifically to can be the 4th gas control plug valve
15, what the AV that code is 17 was referred specifically to can be the second gas control plug valve 17, and what the AV that code is 18 was referred specifically to can be the 6th
Gas control plug valve 18, what the AV that code is 19 was referred specifically to can be the 5th gas control plug valve 19.MC in table refers specifically to hand
Dynamic throttle valve, wherein what the MC that code is 11 was referred specifically to can be first manual throttle valve 11, what the MC that code is 12 was referred specifically to
It can be the second manual throttle valve 12.What the AC in table was referred specifically to can be with gas control throttle valve, wherein the AC that code is 16 is referred specifically to
Can be gas control throttle valve 16.
In the present embodiment, you need to add is that, it is generally the case that be connected in automatic shunt manifold system fixed
When can normally implement automatic shunt operation after shunting connection system 1001, first manual flap type 3, the second manual flat valve 5, the
Three manual flat valves 6 maintain a normally open.The aperture that first manual throttle valve 11, the second manual throttle valve 12 keep certain is constant,
In, specific opening value can be determined by the result data that lab and field is tested.Ensure third gas control cock
The safety of valve 13, the first gas control plug valve 14 switch, prevents the damage of excessive pressure difference and throughput to valve.If automatic shunt
Manifold system is not connected to fixed shunting connection system 1001 or is in the special operation conditions such as repair, first manual flap type 3,
7th gas control plug valve 4 can specifically stay open, and the second manual flat valve 5, third manual flat valve 6 can specifically keep closing
It closes.
In the present embodiment, can be in conjunction with content shown in table 1, according to different operating modes when specific implementation, it can be by
Concrete operations are carried out according to following manner, it is automatic to carry out preparing before recycling, make up a joint with filling pipeline, drilling respectively, to be transferred to
When shunting, completing ground cycle, standpipe release, make up a joint, switches back into standpipe access, shunting vertical tube pressure equilibrium, completes pit shaft
The corresponding shunting processing such as cycle, isolation diverter, diverter release.
S1：Start slush pump, filling pipeline.
When it is implemented, the 7th gas control plug valve 4, third gas control plug valve 14, the second gas control plug valve can be opened first
17, the 6th gas control plug valve 18, the 5th gas control plug valve 19, turn off third gas control plug valve 13, the 4th gas control plug valve 15,
5th gas control plug valve 19, and the aperture for adjusting gas control throttle valve 16 keeps standard-sized sheet, finally starts slush pump 2 with filling pipeline.
S2：Drilling cycle.
When it is implemented, the first gas control plug valve 14, the 5th gas control plug valve 19, the 6th gas control plug valve can be closed first
18, then adjust the aperture of gas control throttle valve 16 and keep half-open, and other control valves is kept to be in home state.Specifically, gas control
Throttle valve 16 keeps half-open, the second gas control plug valve 17 is kept it turning on.Wherein, the reason of the second gas control plug valve 17 is kept it turning on
It is on the one hand to facilitate being turned on or off for gas control throttle valve 16, is on the other hand in order to which first pressure gauge 20 can be utilized
Whether the control valve in monitoring automatic shunt manifold seals.It closes the 5th gas control plug valve 19 and is in order to by automatic shunt manifold
System is isolated with controlled pressure drilling equipment 23.
S3：Prepare before making up a joint.
When specific implementation, gas control throttle valve 16 can be first closed, then open the 5th gas control plug valve 19, and keep other
Control valve is in home state.The purpose of aforesaid operations is so that pipeline between gas control throttle valve 16 and the 5th gas control plug valve 19
It is unobstructed, it not build the pressure.
S4：It is transferred to automatic shunt.
When it is implemented, the first gas control plug valve 14 can be first opened, then by the aperture of gas control throttle valve 16 gradually by complete
Pass is adjusted to standard-sized sheet, and other control valves is kept to be in home state, record second pressure gauge 7, first pressure gauge 20, electromagnetism
The reading of flowmeter 21.It is less than gas control plug valve normal switch institute in the reading difference of second pressure gauge 7 and first pressure gauge 20
When the maximum differential pressure of permission, for the stabilization and safety of long-term work, above-mentioned difference of reading can be set no more than 3MPa.To
The major part of mud pumpage can be gone to controlled pressure drilling equipment 23 by automatic shunt manifold.
S5：Complete ground cycle.
When it is implemented, the 4th gas control plug valve 15 can be opened, the second gas control plug valve 17 is turned off, closes the 7th gas
Plug valve 4 is controlled, and other control valves is kept to be in home state.So that flow is turning fully to ground, and pass through control
Drilling equipment 23 is pressed to increase well head pressure rapidly, to ensure that bottom pressure is constant.
S6：Standpipe release.
When it is implemented, the 6th gas control plug valve 18 can be opened first, lift line pressure is laid down, in order to make up a joint,
Turn off the first gas control plug valve 14.
S7：When making up a joint.
When it is implemented, can start to make up a joint in the case where the reading of second pressure gauge 7 is zero.Specifically, can be with
The 6th gas control plug valve 18 is closed, and other control valves is kept to be in home state.In other works such as made a trip, change glue core
When condition is constructed, it can also be handled with reference to the corresponding mode of this operating mode.
S8：Switch back into standpipe access.
When it is implemented, third gas control plug valve 13 can be opened first, with switching channel, and other control valves is kept to be in
Home state.The purpose of aforesaid operations is can to switch mud flow rate after making up a joint and branch to standpipe balance.
S9：Shunt vertical tube pressure equilibrium.
When it is implemented, when second pressure gauge 7 and the difference of reading of first pressure gauge 20 permit less than gas control cock valve switching
When maximum differential pressure perhaps, the 7th gas control plug valve 4 is opened, and other control valves is kept to be in home state.
S10：Complete pit shaft cycle.
When it is implemented, third gas control plug valve 13 can be closed first, the 4th gas control plug valve 15 is turned off, and keep it
He is in home state by control valve.It after channel switches, then equips 23 by controlled pressure drilling and reduces rapidly well head pressure, ensure
Bottom pressure is constant.
S11：Diverter is isolated.
When it is implemented, the 5th gas control plug valve 19 can be closed, and other control valves is kept to be in home state.
S12：Diverter release.
When it is implemented, the second gas control plug valve 17 can be opened first, then the 6th gas control plug valve 18 is opened, and keeps it
He is in home state by control valve.
By above-mentioned Sample Scenario, drilling fluid diverter control system provided by the embodiments of the present application and method are demonstrated, by
In in view of controlled pressure drilling operation construction characteristic and requirement, be provided with a plurality of split channel, and be provided with again on split channel
Multiple control valves coordinate flow-dividing control corresponding with a variety of construction targets so that, can be fast when carrying out the construction target such as creeping into
Speed, smoothly by drilling-fluid circulation system be switched to pit shaft cycle；It, can be with when the construction target such as being made up a joint or being made a trip
Quickly, drilling-fluid circulation system is smoothly switched to ground cycle, with steady pressure environment, solved in existing system really
It is existing it is complicated, implementation cost is high, the technical issues of being of limited application, reach can quickly, simply be directed to it is a variety of
Construction target carries out corresponding drilling fluid flow-dividing control with the technique effect stablized bottom pressure, ensure drilling safety.
Although mentioning different specific embodiments in teachings herein, the application is not limited to be industry
Situation etc. described in standard or embodiment, certain professional standards or the implementation base described using self-defined mode or embodiment
On plinth embodiment modified slightly can also realize above-described embodiment it is identical, it is equivalent or it is close or deformation after it is anticipated that
Implementation result.It, still can be with using these modifications or the embodiment of deformed data acquisition, processing, output, judgment mode etc.
Belong within the scope of the optional embodiment of the application.
Although this application provides the method operating procedure as described in embodiment or flow chart, based on conventional or noninvasive
The means for the property made may include more or less operating procedure.The step of being enumerated in embodiment sequence is only numerous steps
A kind of mode in execution sequence does not represent and unique executes sequence.It, can when device or client production in practice executes
With according to embodiment, either method shown in the drawings sequence is executed or parallel executed (such as at parallel processor or multithreading
The environment of reason, even distributed data processing environment).The terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, product or equipment including a series of elements are not only wanted including those
Element, but also include other elements that are not explicitly listed, or further include for this process, method, product or equipment
Intrinsic element.In the absence of more restrictions, be not precluded including the element process, method, product or
There is also other identical or equivalent elements in person's equipment.
Device that above-described embodiment illustrates or module etc. can specifically realize by computer chip or entity, or by having
There is the product of certain function to realize.For convenience of description, it is divided into various modules when description apparatus above with function to retouch respectively
It states.Certainly, the function of each module is realized can in the same or multiple software and or hardware when implementing the application,
The module for realizing same function can be realized by the combination of multiple submodule etc..Device embodiment described above is only
Schematically, for example, the division of the module, only a kind of division of logic function, can there is other draw in actual implementation
The mode of dividing, such as multiple module or components can be combined or can be integrated into another system, or some features can be ignored,
Or it does not execute.
It is also known in the art that other than realizing controller in a manner of pure computer readable program code, it is complete
Entirely can by by method and step carry out programming in logic come so that controller with logic gate, switch, application-specific integrated circuit, programmable
The form of logic controller and embedded microcontroller etc. realizes identical function.Therefore this controller is considered one kind
Hardware component, and the structure that the device for realizing various functions that its inside includes can also be considered as in hardware component.Or
Person even, can will be considered as either the software module of implementation method can be hardware again for realizing the device of various functions
Structure in component.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Usually, program module includes routines performing specific tasks or implementing specific abstract data types, program, object, group
Part, data structure, class etc..The application can also be put into practice in a distributed computing environment, in these distributed computing environments,
By executing task by the connected remote processing devices of communication network.In a distributed computing environment, program module can
With in the local and remote computer storage media including storage device.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be expressed in the form of software products, the computer software product
It can be stored in a storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment
(can be personal computer, mobile terminal, server either network equipment etc.) executes each embodiment of the application or implementation
Method described in certain parts of example.
Each embodiment in this specification is described by the way of progressive, same or analogous portion between each embodiment
Point just to refer each other, and each embodiment focuses on the differences from other embodiments.The application can be used for crowd
In mostly general or special purpose computing system environments or configuration.Such as：Personal computer, server computer, handheld device or
Portable device, laptop device, multicomputer system, microprocessor-based system, set top box, programmable electronics set
Standby, network PC, minicomputer, mainframe computer include the distributed computing environment etc. of any of the above system or equipment.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application there are many deformation and
Variation does not depart from spirit herein, it is desirable to which appended embodiment includes that these deformations and variation do not depart from the application.
Claims (11)
1. a kind of drilling fluid diverter control system, which is characterized in that including：First passage, second channel and third channel,
In, the first passage and the second channel are in parallel, the first end and well of the first passage and second channel parallel connection
Mouth is connected, and the second end of the first passage and second channel parallel connection is connected with the third channel, the third channel
It is connected with controlled pressure drilling equipment, wherein：
First manual throttle valve, the first gas control plug valve, gas control throttle valve, the second gas control are disposed on the first passage
Plug valve, and it is also associated with blowdown line between the gas control throttle valve and the second gas control plug valve, wherein it is described to let out
Pressure pipeline is connected with slurry tank；
The second manual throttle valve, third gas control plug valve, the 4th gas control plug valve are disposed on the second channel；
The 5th gas control plug valve, ball-and-seat are disposed on the third channel；
The 6th gas control plug valve is provided on the blowdown line.
2. system according to claim 1, which is characterized in that first pressure gauge is provided on the third channel, it is described
First pressure gauge is used to measure the pressure for the drilling fluid being diverted.
3. system according to claim 2, which is characterized in that be additionally provided with flowmeter, the stream on the third channel
Gauge is used to measure the flow for the drilling fluid being diverted.
4. system according to claim 1, which is characterized in that the system also includes connection structure, the connection structure
For connecting the drilling fluid diverter control system and well head, wherein the connection structure includes put-through channel, the first connecting line
Road, the second connection line, the put-through channel are used to connect the standpipe at slush pump and the well head；First connection line
The put-through channel is set to close to one end of well head, first connection line is for connecting the put-through channel and described the
The first end in one channel and second channel parallel connection；One end of second connection line is with the put-through channel close to mud
One end of pump is connected, the other end and third gas control plug valve and the 4th gas control in the second channel of second connection line
Pipeline between plug valve is connected.
5. system according to claim 4, which is characterized in that be disposed with first manual tablet on the put-through channel
Valve, the 7th gas control plug valve.
6. system according to claim 4, which is characterized in that be provided with the second manual platform in first connection line
Valve is provided with third manual flat valve in second connection line.
7. system according to claim 4, which is characterized in that be provided with second pressure gauge on the standpipe.
8. system according to claim 1, which is characterized in that the controlled pressure drilling equipment is also controlled with the rotation of well head and filled
It sets connected, hydraulic control flap type, the 4th hand is also disposed between the rotating control assembly and the controlled pressure drilling equipment
Dynamic flap type.
9. a kind of drilling fluid flow-dividing control method, which is characterized in that including：
According to construction target, by control the drilling fluid diverter control system described in any one of claim 1 to 8 respectively the
One gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas control plug valve, the 6th
Gas control plug valve is turned on and off, and adjusts the aperture of the gas control throttle valve, to carry out drilling fluid shunting, wherein described to apply
Work target includes at least one of：Filling pipeline, drilling cycle complete ground cycle, complete pit shaft cycle, standpipe pressure release.
10. according to the method described in claim 9, it is characterized in that, the construction target be filling pipeline in the case of, institute
It states by controlling the first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, respectively
Five gas control plug valves, the 6th gas control plug valve are turned on and off, and adjust the aperture of the gas control throttle valve, to carry out drilling fluid
Shunting, including：
The first gas control plug valve, the second gas control plug valve, the 6th gas control plug valve are opened, third gas control plug valve, the 4th are closed
Gas control plug valve, the 5th gas control plug valve, and the aperture for adjusting gas control throttle valve is standard-sized sheet, it is corresponding with filling pipeline to carry out
Drilling fluid shunts.
11. according to the method described in claim 9, it is characterized in that, in the case where the construction target is drilling cycle, lead to
It crosses and controls the first gas control plug valve, the second gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th gas respectively
Control plug valve, the 6th gas control plug valve are turned on and off, and adjust the aperture of the gas control throttle valve, to carry out drilling fluid point
Stream, including：
The second gas control plug valve is opened, the first gas control plug valve, third gas control plug valve, the 4th gas control plug valve, the 5th are closed
Gas control plug valve, the 6th gas control plug valve, and adjust gas control throttle valve aperture be it is half-open, it is corresponding with cycle is crept into carry out
Drilling fluid shunts.
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| CN201810204697.2A CN108457610B (en) | 2018-03-13 | 2018-03-13 | Drilling fluid diversion control system and method |
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| CN201810204697.2A CN108457610B (en) | 2018-03-13 | 2018-03-13 | Drilling fluid diversion control system and method |
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| CN108457610B (en) | 2023-09-26 |
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