CN108798565A - The fine pressure control drainage system of high pressured slatwater layer and pressure control water discharge method - Google Patents
The fine pressure control drainage system of high pressured slatwater layer and pressure control water discharge method Download PDFInfo
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- CN108798565A CN108798565A CN201810593181.1A CN201810593181A CN108798565A CN 108798565 A CN108798565 A CN 108798565A CN 201810593181 A CN201810593181 A CN 201810593181A CN 108798565 A CN108798565 A CN 108798565A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 107
- 239000012267 brine Substances 0.000 claims abstract description 41
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 40
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 150000003839 salts Chemical class 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 230000001629 suppression Effects 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 12
- 238000010079 rubber tapping Methods 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 17
- 238000013461 design Methods 0.000 claims description 13
- 239000000725 suspension Substances 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000005185 salting out Methods 0.000 description 3
- 238000011109 contamination Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000012279 drainage procedure Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002045 lasting effect 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
- 238000012805 post-processing Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000005514 two-phase flow Effects 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
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Abstract
A kind of fine pressure control drainage system of high pressured slatwater layer and pressure control water discharge method, including high pressure brine tapping equipment：Including the drilling rod in casing, tripping in casing, drilling rod band packer installs throttle valve, and drilling rod, which is located on drilling platforms, to be connect by coiled tubing open flow box with high-pressure outlet pipeline, is connect with fine pressure control throttling sled with liquid-gas separator by middle pressure outlet line；Anti- high pressure brine constructional device：Including coiled tubing, it is connect with slurry tank and suppression salt agent tank by Operation Tubing Aggregate, injection head and preventer；Ground pressure control throttling set：Including the fine pressure control throttling sledge being installed on middle pressure outlet line, the pressure of acquisition, data on flows are transferred to computer control system by fine pressure control throttling sledge by PLC system, and computer control system controls geostatic pressure according to the data of acquisition；Formation pressure testing device：Including drilling team's throttling sledge, it is connect with liquid-gas separator by drilling team's choke flow line.The present invention is sustainable, controllable, safely discharges formation brine.
Description
Technical field
The present invention relates to controlled pressure drilling technical field, in particular relate to a kind of fine pressure control drainage system of high pressured slatwater layer and
Pressure control water discharge method.
Background technology
West area saline bed buries deep and huge thickness, and the low pressure of development super-pressure brine layer and weak anti-tensile is thin between saline bed
Sand shale causes safety drilling pressure window narrow, and the complex situations such as leakage, overflow take place frequently, and seriously affects drilling well production.
Since the casing number of plies is limited by casing programme, pressure system (i.e. high pressure can not be covered by existing for same Open-Hole Section more
Brine layer and thief formation) keep apart；For thief formation, current techniques are difficult that Formation bearing pressure is increased to satisfaction
The requirement of stable high-pressure water layer is pressed, this results in such narrow stratum safety drilling pressure window, without window, even negative window, conventional
Drilling technology is difficult to normal safety drilling, often occur during wellbore construction leakage, overflow, repeatedly pressurization sealing, bit freezing and
The vicious circles situation such as casing collapse seriously affects safety and the well construction period of drilling well.
Mainly have currently, boring and meeting high pressured slatwater layer disposing technique：Improve density kill-job+leak stopping disposing technique, conventional pressure control
Discharge water technology.The conventional pressure control technology that discharges water obtains certain effect, and but there are the following problems：
(1) oil-base mud is seriously polluted, efficiency is low, and post-processing is costly；
(2) saturation or supersaturated brine are during cycle moves up, since pressure, temperature reduction cause salting-out phenomenon tight
Weight easily forms near the ground or floor passageway and blocks and cause underground complexity and well control risk；
(3) since two phase flow discharges, displacement cannot be accurately calculated and discharge the relationship of reservoir pressure coefficient variation；
(4) cannot be that being precisely controlled for follow-up well draining provides reliable foundation.
Therefore, how to solve the above problems, be the project that the present inventor concentrates on studies.
Invention content
It, can be with the object of the present invention is to provide a kind of fine pressure control drainage system of high pressured slatwater layer and pressure control water discharge method
It is lasting, controllable, safely discharge formation brine.
In order to realize that said program, the present invention provide a kind of fine pressure control drainage system of high pressured slatwater layer, including：
High pressure brine tapping equipment：High pressured slatwater layer in casing, tripping in casing including tripping in high pressured slatwater layer top
The drilling rod at top carries packer on the drilling rod, and is equipped with throttle valve, and the drilling rod is located on drilling platforms, passes through
Coiled tubing open flow box is connect with high-pressure outlet pipeline, and by middle pressure outlet line and fine pressure control throttling sled with liquid qi leel from
Device connects；
Anti- high pressure brine constructional device：Including the coiled tubing in tripping in drilling rod, the coiled tubing passes through coiled tubing
Vehicle, injection head and preventer are connect with slurry tank and suppression salt agent tank；
Ground pressure control throttling set：Including computer control system and fine pressure control throttling sledge, the fine pressure control throttling
The pressure of acquisition, data on flows are transferred to computer control system by sledge by PLC system, the computer control system according to
The data of acquisition control geostatic pressure, and the fine pressure control throttling sledge is installed on medium pressure outlet line；
Formation pressure testing device：Throttle sledge including drilling team, drilling team throttling sledge by drilling team's choke flow line with it is described
Liquid-gas separator connects.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the drilling rod is located at the installation of one end on drilling platforms
The oil tube blowout control box is installed in the upper end of coiled tubing preventer, the coiled tubing preventer, and the coiled tubing passes through oil
After pipe blowout prevention box and coiled tubing preventer in tripping in drilling rod, the coiled tubing preventer connects with the high-pressure outlet pipeline
It connects.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the high-pressure outlet pipeline and middle pressure outlet line,
Low tension outlet pipeline is sequentially connected, and is separately installed on the high-pressure outlet pipeline, middle pressure outlet line and low tension outlet pipeline
High-pressure outlet sensor, middle pressure exit sensor and low tension outlet sensor.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein further including underground separating device, the underground separates
Device includes the drilling rod suspension for being installed on drilling rod upper end, and the drilling rod is positioned over by drilling rod suspension on drilling platforms, the brill
Lower section on bar positioned at drilling platforms is equipped with swivel control head, annular preventer and ram preventer from top to bottom.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the liquid-gas separator passes through pipe into air-liquid mouth
Line and drilling team throttling sledge are connect, and the gas outlet of the liquid-gas separator is connect by pipeline with burning torch, the liquid qi leel from
Liquid outlet and sewage draining exit and the mud of device return stock tank and connect, and the mud returns stock tank and connect with slurry tank and brine tank.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the input end of the Operation Tubing Aggregate and pump truck connects
It connecing, the coiled tubing is installed on Operation Tubing Aggregate, and the outlet end of the pump truck is connect with the suppression salt agent tank and slurry tank,
Pump rush sensor and pump truck pressure sensor are provided on the pump truck.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the fine pressure control throttling sled is described including being installed on
Throttle valve on low tension outlet pipeline and mass flowmenter, before being separately installed with valve on the pipeline forward and backward positioned at the throttle valve
Pressure sensor and downstream pressure sensor, the mass flowmenter, upstream pressure sensor and downstream pressure sensor difference
It is connect with the PLC system.
The fine pressure control drainage system of high pressured slatwater layer of the present invention, wherein the computer control system passes through transmission line and institute
State PLC system connection.
A kind of fine pressure control water discharge method of high pressured slatwater layer, including following steps：
(1) stable high-pressure brine layer is pressed, the fine pressure control drainage system of high pressured slatwater layer is installed in place；
(2) the part mud that drilling tool top is replaced out in suppression salt agent is pumped by pump truck, reduces head of liquid in drilling tool, form well
Cylinder high pressured slatwater layer underbalance, so that high pressure brine enters in pit shaft to drilling tool；
(3) steady appropriate adjusting well head pressure, controls high pressured slatwater layer water flow；
(4) after mud all replaces out pit shaft, equilibrium strata pressure is tested and recorded to closing well, calculates initial formation pressure；
(5) it slowly drives a well, then turn on pump vehicle again, it is flat using the fine pressure control sled control high pressured slatwater layer water flow that throttles
Surely；
(6) it during brine discharge, keeps injection pump speed constant, pays close attention to each pressure in ground, rate of discharge, throttle valve and open
The variation of degree；
(7) normal in all operating modes, brine volume design flow is given off according to design requirement；Or in a cutting
In the case of condition is normal, saline bed pressure value is reduced by salt discharge water according to design requirement；
(8) when meeting design requirement, kill-job in drilling tool is carried out：It is pumped into first using coiled tubing consistent with well pulp density
Mud, while adjusting well head pressure, keep inlet and outlet flow consistent, until entrance mud density is identical；Closing well later, from
Annular space between coiled tubing and drilling rod is pumped into mud, and coiled tubing brine below is squeezed into stratum.
The fine pressure control water discharge method of high pressured slatwater layer of the present invention, wherein the high pressured slatwater layer essence described in the step (1)
The thin specific installation steps of pressure control drainage system include following：
A, stable high-pressure brine layer is pressed, it will be on high pressured slatwater layer in the drilling rod tripping in casing with separator and Multi-level throttle valve
Drilling rod suspension is installed on the upper end of drilling rod, and makes drilling rod hangoff receptacle on drilling platforms by portion；
B, in the upper end of drilling rod installation coiled tubing preventer, continuous oil pipe anti-blow-out box, coiled tubing injection head, continuous
Tripping in coiled tubing on tubing injector head makes the inner cavity lower part of the lower end tripping in drilling rod of coiled tubing, apart from Multi-level throttle valve
It is topmost 10~15m；
C, connection suppression salt agent tank, the second slurry tank, actuating unit and Operation Tubing Aggregate；
D, continuous oil pipe anti-blow-out box, high-pressure outlet pipeline, drilling team's choke flow line, middle pressure outlet line, fine pressure control are connected
Throttling sled, low tension outlet pipeline, then divide two-way, arrive mud all the way and return stock tank, the first slurry tank and brine tank；Another way is to liquid
Gas separating device, the first slurry tank and brine tank, separation gas to burning torch；
E, by PLC system and pump rush sensor, pump truck pressure sensor, high-pressure outlet sensor, upstream pressure sensor,
Downstream pressure sensor, mass flowmenter and the connection of low tension outlet sensor；
F, PLC system is connect with computer control system by data line.
After adopting the above scheme, the fine pressure control drainage system of high pressured slatwater layer of the present invention and pressure control water discharge method have following
Advantageous effect：
(1) in entire fine pressure control drainage procedure, engineering parameter is constantly recorded with data and graphical display, is monitored, favorably
In judging underground situation and timely processing, underground complexity and well control risk are avoided；
(2) it takes down-hole multilevel to throttle, reduces well head pressure pressure control value, reduce well head risk；
(3) by anti-brine crystallization technique, near the ground or floor passageway caused by preventing salting-out phenomenon blocks；
(4) mud contamination is effectively reduced, mud and mud subsequent treatment cost are reduced；
It (5) can safely continued emissions, efficient.
Description of the drawings
Fig. 1 is the structural schematic diagram of the fine pressure control drainage system of high pressured slatwater layer of the present invention.
Specific implementation mode
As shown in Figure 1, the fine pressure control drainage system of high pressured slatwater layer of the present invention, including：
High pressure brine tapping equipment：In casing 2, tripping in casing 2 including 1 top of tripping in high pressured slatwater layer with high pressure salt
The drilling rod 3 at the top of water layer 1 is equipped with Multi-level throttle valve 4 on drilling rod 3, separator 5 is installed between drilling rod 3 and casing 2.3, drilling rod
Coiled tubing preventer 7 is installed in one end on drilling platforms 6, the upper end installation coiled tubing of coiled tubing preventer 7 is anti-
Spray box 8 is equipped with connected pipes injection head 40 on continuous oil pipe anti-blow-out box 8, and drilling rod 3 passes through continuous oil pipe anti-blow-out box 8 and high pressure
Outlet line 10 connects, and is connect with fine pressure control throttling sled 27 and liquid-gas separator 16 by middle pressure outlet line 11.High pressure
Outlet line 10 is sequentially connected with middle pressure outlet line 11 and low tension outlet pipeline 12, high-pressure outlet pipeline 10, low tension outlet pipe
Be separately installed with high-pressure outlet sensor 13 and low tension outlet sensor 14 on line 12, high-pressure outlet sensor 13 by pipeline with
Casing 2 connects.High-pressure outlet pipeline 10 is connect with continuous oil pipe anti-blow-out box 8, casing 2.Liquid-gas separator 16 leads into air-liquid mouth
It crosses pipeline and drilling team throttling sledge 17 to connect, the gas outlet of liquid-gas separator 16 is connect by pipeline with burning torch 18, liquid qi leel
Liquid outlet and sewage draining exit from device 16 return stock tank 15 with mud and connect, and mud returns stock tank 15 and the first slurry tank 19 and brine tank 20
Connection；
Anti- high pressure brine constructional device：Including coiled tubing 9, coiled tubing 9 passes through coiled tubing injection head 40, continuous oil
After pipe blowout prevention box 8 and coiled tubing preventer 7 in tripping in drilling rod 3, coiled tubing 9 passes through Operation Tubing Aggregate 24,40 and of injection head
Coiled tubing preventer 7 is connect with the second slurry tank 21 and suppression salt agent tank 22.Operation Tubing Aggregate 24 and the input end of pump truck 23 connect
It connecing, coiled tubing 7 is installed on Operation Tubing Aggregate 24, the outlet end of pump truck 23 is connect with suppression salt agent tank 22 and the second slurry tank 21,
Pump rush sensor 25 and pump truck pressure sensor 26 are provided on pump truck 23；
Ground pressure control throttling set：Including computer control system 33 and fine pressure control throttling sledge 27, fine pressure control throttling
Sled 27 includes the throttle valve 28 and mass flowmenter 29 being installed on low tension outlet pipeline 12, is located at the forward and backward pipe of throttle valve 28
Upstream pressure sensor 30 and downstream pressure sensor 31, mass flowmenter 29, upstream pressure sensor are separately installed on line
30 and downstream pressure sensor 31 connect with PLC system 32, fine pressure control throttling sledge 27 is by upstream pressure sensor 30 and valve
The flow of pressure sensor 31 acquires afterwards pressure, the acquisition of mass flowmenter 29 is transferred to PLC system 32, and PLC system 32 again will
These data conversions are transferred to computer control system 33, and computer control system 33 is connected by transmission line 34 and PLC system 32
It connects, computer control system 33 controls geostatic pressure according to the data of acquisition, and fine pressure control throttling sledge 27 is installed on middle extrusion mouth
On pipeline 11；
Formation pressure testing device：Including drilling team's throttling sledge 17, drilling team's throttling sledge 17 passes through drilling team's choke flow line 35 and liquid
Gas separating device 16 is connected into air-liquid mouth；
Underground separating device：Drilling rod including being installed on 3 upper end of drilling rod hangs 36, and drilling rod 3 is placed by drilling rod suspension 36
In on drilling platforms 6, the lower section on drilling rod 3 positioned at drilling platforms 6 is equipped with swivel control head 37, annular preventer from top to bottom
38 and ram preventer 39.
The fine pressure control water discharge method of high pressured slatwater layer of the present invention, includes the following steps：
(1) pressure stable high-pressure brine layer 1 is installed the fine pressure control drainage system of high pressured slatwater layer in place：It will carry and separate
Drilling rod suspension 36 is installed on the upper of drilling rod 3 by 1 top of high pressured slatwater layer in the 3 tripping in casing 2 of drilling rod of device 5 and Multi-level throttle valve 4
End, and drilling rod is made to hang 36 on drilling platforms 6；
(2) coiled tubing preventer 7, continuous oil pipe anti-blow-out box 8, coiled tubing injection head 40 are installed in the upper end of drilling rod 3,
The tripping in coiled tubing 9 on coiled tubing injection head 40 keeps the inner cavity lower part of the lower end tripping in drilling rod 3 of coiled tubing 9, distance more
The top of grade throttle valve 4 is 10~15m；
(3) connection suppression salt agent tank 22, the second slurry tank 21, pump truck 23 and Operation Tubing Aggregate 24；
(4) connect continuous oil pipe anti-blow-out box 8, high-pressure outlet pipeline 10, drilling team's choke flow line 35, middle pressure outlet line 11,
Fine pressure control throttling sled 27, low tension outlet pipeline 12, then divide two-way, arrive mud all the way and return stock tank 15,19 and of the first slurry tank
Brine tank 20：Another way is to liquid-gas separator 16, the first slurry tank 19 and brine tank 20, separation gas to burning torch 18；
(5) it will be pressed before PLC system 32 and pump rush sensor 25, pump truck pressure sensor 26, high-pressure outlet sensor 13, valve
Force snesor 30, downstream pressure sensor 31, mass flowmenter 29 and low tension outlet sensor 14 connect；
(6) PLC system 32 is connect with computer control system 33 by data line 34；
(7) the part mud that drilling tool top is replaced out in suppression salt agent is pumped by pump truck 23, reduces head of liquid in drilling tool, formed
Pit shaft high pressured slatwater layer underbalance, so that high pressure brine enters in pit shaft to drilling tool；
(8) steady appropriate adjusting well head pressure, controls the water flow of high pressured slatwater layer 1；
(9) after mud all replaces out pit shaft, equilibrium strata pressure is tested and recorded to closing well, calculates initial formation pressure；
(10) it slowly drives a well, then turn on pump vehicle 23 again, utilizes the water outlets of 27 control high pressured slatwater layers 1 of fine pressure control throttling sled
Flow trim；
(11) it during brine discharge, keeps injection pump speed constant, pays close attention to each pressure in ground, rate of discharge, throttle valve
The variation of aperture；
(12) normal in all operating modes, brine volume design flow is given off according to design requirement；Or at all
In the case of operating mode is normal, saline bed pressure value is reduced by salt discharge water according to design requirement；
(13) when meeting design requirement, kill-job in drilling tool is carried out：It is pumped into and well pulp density one using coiled tubing 9 first
The mud of cause, while well head pressure is adjusted, keep inlet and outlet flow consistent, until entrance mud density is identical；Closing well later,
Annular space between coiled tubing 9 and drilling rod 3 is pumped into mud, and 9 brine below of coiled tubing is squeezed into stratum；
(14) it drives a well, overflow inspection meets trip-out condition；
(15) it rises and coiled tubing 9, dismounting coiled tubing injection head 40, continuous oil pipe anti-blow-out box 8, coiled tubing preventer
7；
(16) jointed rod 3, demolition drilling rod suspension 36, deblocking separator 5；
(17) overflow inspection, pull out of hole, get rid of tool, the fine pressure control equipment of dismounting；
(18) construction terminates.
Previous step (14)~(18) are demounting procedures after having drained.
The fine pressure control drainage system of high pressured slatwater layer of the present invention is in entire fine pressure control drainage procedure, and engineering parameter is with number
According to constantly recording, monitoring with graphical display, underground situation and timely processing are facilitated deciding on, underground complexity and well control wind are avoided
Danger；By taking down-hole multilevel to throttle, well head pressure pressure control value is reduced, well head risk is reduced；By anti-brine crystallization technique,
Near the ground or floor passageway caused by preventing salting-out phenomenon blocks；Mud contamination is effectively reduced, mud is reduced and mud is subsequently located
Manage cost；It can safely continued emissions, efficient.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the scope of the present invention
It is defined, under the premise of not departing from design spirit of the present invention, technology of this field ordinary engineering and technical personnel to the present invention
The various modifications and improvement that scheme is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (10)
1. a kind of fine pressure control drainage system of high pressured slatwater layer, which is characterized in that including：
High pressure brine tapping equipment：At the top of high pressured slatwater layer in casing, tripping in casing including tripping in high pressured slatwater layer top
Drilling rod, packer is carried on the drilling rod, and throttle valve is installed, the drilling rod is located on drilling platforms, by continuous
Oil pipe open flow box is connect with high-pressure outlet pipeline, and is connected with liquid-gas separator by middle pressure outlet line and fine pressure control throttling sled
It connects；
Anti- high pressure brine constructional device：Including the coiled tubing in tripping in drilling rod, the coiled tubing passes through Operation Tubing Aggregate, note
Enter head and preventer to connect with slurry tank and suppression salt agent tank；
Ground pressure control throttling set：Including computer control system and fine pressure control throttling sledge, the fine pressure control throttling sledge will
Pressure, the data on flows of acquisition are transferred to computer control system by PLC system, and the computer control system is according to acquisition
Data control geostatic pressure, the fine pressure control throttling sledge is installed on medium pressure outlet line；
Formation pressure testing device：Including drilling team's throttling sledge, drilling team's throttling sledge passes through drilling team's choke flow line and the liquid gas
Separator connects.
2. the fine pressure control drainage system of high pressured slatwater layer according to claim 1, which is characterized in that the drilling rod, which is located at, to be bored
Coiled tubing preventer is installed in one end on well platform, and the oil tube blowout control box is installed in the upper end of the coiled tubing preventer,
The coiled tubing is by tripping in drilling rod after oil tube blowout control box and coiled tubing preventer, the coiled tubing preventer and institute
State the connection of high-pressure outlet pipeline.
3. the fine pressure control drainage system of high pressured slatwater layer according to claim 2, which is characterized in that the high-pressure outlet pipe
Line is sequentially connected with middle pressure outlet line, low tension outlet pipeline, the high-pressure outlet pipeline, middle pressure outlet line and low tension outlet
High-pressure outlet sensor, middle pressure exit sensor and low tension outlet sensor are separately installed on pipeline.
4. the fine pressure control drainage system of high pressured slatwater layer according to claim 3, which is characterized in that further include that underground separates
Device, the underground separating device include the drilling rod suspension for being installed on drilling rod upper end, and the drilling rod is positioned over by drilling rod suspension
On drilling platforms, on the drilling rod positioned at drilling platforms lower section be equipped with from top to bottom swivel control head, annular preventer and
Ram preventer.
5. the fine pressure control drainage system of high pressured slatwater layer according to claim 4, which is characterized in that the liquid-gas separator
Connect into air-liquid mouth by pipeline and the drilling team sledge that throttles, the gas outlet of the liquid-gas separator passes through pipeline and burning torch
Connection, liquid outlet and sewage draining exit and the mud of the liquid-gas separator returns stock tank and connect, the mud return stock tank and slurry tank and
Brine tank connects.
6. the fine pressure control drainage system of high pressured slatwater layer according to claim 5, which is characterized in that the Operation Tubing Aggregate
It is connect with the input end of pump truck, the coiled tubing is installed on Operation Tubing Aggregate, the outlet end of the pump truck and the suppression salt
Agent tank is connected with slurry tank, and pump rush sensor and pump truck pressure sensor are provided on the pump truck.
7. the fine pressure control drainage system of high pressured slatwater layer according to claim 6, which is characterized in that the fine pressure control section
Stream sled includes the throttle valve and mass flowmenter being installed on the low tension outlet pipeline, is located at the forward and backward pipe of the throttle valve
Be separately installed with upstream pressure sensor and downstream pressure sensor on line, the mass flowmenter, upstream pressure sensor and
Downstream pressure sensor is connect with the PLC system respectively.
8. the fine pressure control drainage system of high pressured slatwater layer according to claim 7, which is characterized in that the computer control
System is connect by transmission line with the PLC system.
9. a kind of fine pressure control water discharge method of high pressured slatwater layer, which is characterized in that include the following steps：
(1) stable high-pressure brine layer is pressed, the fine pressure control drainage system of high pressured slatwater layer is installed in place；
(2) the part mud that drilling tool top is replaced out in suppression salt agent is pumped by pump truck, reduces head of liquid in drilling tool, it is high to form pit shaft
Brine layer underbalance is pressed, so that high pressure brine enters in pit shaft to drilling tool；
(3) steady appropriate adjusting well head pressure, controls high pressured slatwater layer water flow；
(4) after mud all replaces out pit shaft, equilibrium strata pressure is tested and recorded to closing well, calculates initial formation pressure；
(5) it slowly drives a well, then turn on pump vehicle again, it is steady using the fine pressure control sled control high pressured slatwater layer water flow that throttles；
(6) it during brine discharge, keeps injection pump speed constant, pays close attention to each pressure in ground, rate of discharge, throttle valve opening
Variation；
(7) normal in all operating modes, brine volume design flow is given off according to design requirement；Or all operating modes just
In the case of often, saline bed pressure value is reduced by salt discharge water according to design requirement；
(8) when meeting design requirement, kill-job in drilling tool is carried out：The mud consistent with well pulp density is pumped into using coiled tubing first
Slurry, while well head pressure is adjusted, keep inlet and outlet flow consistent, until entrance mud density is identical；Closing well later, from continuous
Annular space between oil pipe and drilling rod is pumped into mud, and coiled tubing brine below is squeezed into stratum.
10. the fine pressure control water discharge method of high pressured slatwater layer according to claim 9, which is characterized in that in the step (1)
The fine specific installation steps of pressure control drainage system of the high pressured slatwater layer include following：
A, stable high-pressure brine layer is pressed, by high pressured slatwater layer top in the drilling rod tripping in casing with separator and Multi-level throttle valve,
Drilling rod suspension is installed on the upper end of drilling rod, and makes drilling rod hangoff receptacle on drilling platforms；
B, in the upper end of drilling rod installation coiled tubing preventer, continuous oil pipe anti-blow-out box, coiled tubing injection head, in coiled tubing
Tripping in coiled tubing on injection head makes the inner cavity lower part of the lower end tripping in drilling rod of coiled tubing, apart from the most upper of Multi-level throttle valve
Face is 10~15m；
C, connection suppression salt agent tank, the second slurry tank, actuating unit and Operation Tubing Aggregate；
D, continuous oil pipe anti-blow-out box, high-pressure outlet pipeline, drilling team's choke flow line, middle pressure outlet line, the throttling of fine pressure control are connected
Sled, low tension outlet pipeline, then divide two-way, arrive mud all the way and return stock tank, the first slurry tank and brine tank；Another way is to liquid qi leel
From device, the first slurry tank and brine tank, separation gas to burning torch；
It e, will be after PLC system and pump rush sensor, pump truck pressure sensor, high-pressure outlet sensor, upstream pressure sensor, valve
Pressure sensor, mass flowmenter and the connection of low tension outlet sensor；
F, PLC system is connect with computer control system by data line.
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| CN116220584A (en) * | 2023-01-09 | 2023-06-06 | 新疆敦华绿碳技术股份有限公司 | CO (carbon monoxide) 2 Well control system for flooding injection production well and optimization method thereof |
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| CN110485991A (en) * | 2019-09-05 | 2019-11-22 | 新疆格瑞迪斯石油技术股份有限公司 | A kind of overflow leakage loss monitoring alarm system with control sled |
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| CN114427390A (en) * | 2020-09-02 | 2022-05-03 | 中国石油化工股份有限公司 | Salt-removing and salt-preventing injection-production integrated pipe column |
| CN116220584A (en) * | 2023-01-09 | 2023-06-06 | 新疆敦华绿碳技术股份有限公司 | CO (carbon monoxide) 2 Well control system for flooding injection production well and optimization method thereof |
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