CN207245702U - The annular pressure monitoring of deep water hydrocarbon well well head and control device - Google Patents
The annular pressure monitoring of deep water hydrocarbon well well head and control device Download PDFInfo
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- CN207245702U CN207245702U CN201720908561.0U CN201720908561U CN207245702U CN 207245702 U CN207245702 U CN 207245702U CN 201720908561 U CN201720908561 U CN 201720908561U CN 207245702 U CN207245702 U CN 207245702U
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Abstract
Upper piston in the annular pressure monitoring of deep water hydrocarbon well well head and control device, including upper hydraulic cylinder connects the lower piston in lower hydraulic cylinder by piston rod；Upper hydraulic cylinder connects lower hydraulic cylinder by connector；Pressure relief opening is provided with the side wall of lower hydraulic cylinder；Multiple annular pressure pipes that the bottom connecting device installation casing surrounding of lower hydraulic cylinder is set；The annular fluid inlet of device installation casing is provided with pressure sensor；The output terminal connection logic control system of pressure sensor, the output terminal connection hydraulic pump of logic control system, the oil inlet of the upper hydraulic cylinder of oil outlet connection of hydraulic pump；In use, logic control system receives the pressure signal of pressure sensor, when annular pressure signal is less than default threshold pression value, fluid is pressed into casing annulus, is pressurized；The utility model has the advantages of preventing because of the too low oxygen intake of annular pressure, causing casing corrosion, raising air-tightness.
Description
Technical field
It the utility model is related to a kind of annular pressure control apparatus, more particularly to a kind of ring for deep water hydrocarbon well well head
Empty pressure monitoring and control device.
Background technology
In deep water hydrocarbon resources exploration, complicated deep-sea geographical conditions and limited cementing technology, make deep water oily
Gas well forms multiple closed annular spaces, and closed loop is filled with drilling fluid or completion fluid in the air, since formation fluid temperature is higher, is producing
Fluid heat transferring of the meeting into annular space during going out, so that temperature effect can cause closed annular space fluid expansion, produces annular space pressure
Power phenomenon with pressure, the safety and wellbore integrity of serious threat tubing string.
Many researchs are done in terms of deep water hydrocarbon well annular pressure control technology both at home and abroad, these methods are all subject to deep water
The influence of oil gas well environment or casing programme, it is all less desirable to the control effect of annular pressure.Since seabed casing head fills
The particularity put, these control technologies pressure release can only be carried out to single annular pressure and ftercompction controls, it is impossible to more annular pressures
It is monitored and controls；Existing control technology cannot test deep water hydrocarbon casing annular space according to 90 job requirements of API RP
Leakproofness and integrality；When huge discharge injects operation, the decline of annulus fluid temperature causes its volume contraction and then causes annular space
Pressure declines, and causes annular space vacuum, and then oxygen intake occur, causes to corrode.
The content of the invention
In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a kind of annular space for deep water hydrocarbon well well head
Pressure monitoring and control device, annular pressure can be monitored and controlled in real time, carry out ftercompction and pressure release, prevent because of annular pressure mistake
Low oxygen intake, causes casing corrosion.
To achieve the above object, the utility model adopts the following technical solution：
The annular pressure of deep water hydrocarbon well well head monitors and control device, including upper hydraulic cylinder 7, upper in upper hydraulic cylinder 7
Piston 1 connects the lower piston 5 in lower hydraulic cylinder 10 by piston rod 2；Upper hydraulic cylinder 7 connects lower hydraulic cylinder by connector 8
10；Pressure relief opening 4 is provided with the side wall of lower hydraulic cylinder 10；Bottom connecting device 12 surrounding of installation casing of lower hydraulic cylinder 10 is set
Multiple annular pressure pipe 2-1；The annular fluid inlet of device installation casing 12 is provided with pressure sensor 13；Pressure sensing
The output terminal connection logic control system 15 of device 13, the output terminal connection hydraulic pump 14 of logic control system 15, hydraulic pump 14
The oil inlet of the upper hydraulic cylinder 7 of oil outlet connection.
Further, compression packing element 9 is provided with the lower hydraulic cylinder 10, the bottom of compression packing element 9 is provided with annular
Piston 3, annular piston 3 connect lower piston 5 by spring 11.
Further, the upper and lower ends of device installation casing 12 in upper casing head 2-2 and are trapped tube head by flanged joint
2-3。
Further, the annular pressure pipe 2-1 that 12 surrounding of device installation casing is set is provided with four.
The beneficial effects of the utility model：
1st, the utility model has monitoring pressure in real time value using pressure sensor 13；
2nd, pressure release can be realized by being provided with pressure relief opening 4 on the side wall of lower hydraulic cylinder 10；
3rd, when carrying out huge discharge injection, casing annulus ftercompction can be prevented from, because of the too low oxygen intake of annular pressure, causing
Casing corrosion.
Brief description of the drawings
Fig. 1 is the structure composition schematic diagram of the utility model.
Fig. 2 is that the device of the utility model installs the structure diagram of casing.
In Fig. 1：1-upper piston；2-piston rod；3-annular piston；4-pressure relief opening；5-lower piston；6-upper end cover；
7-go up hydraulic cylinder；8-connector；9-compression packing element；10-lower hydraulic cylinder；11-spring；12-device installs casing；
13-pressure sensor；14-hydraulic pump；15-logic control system.
In Fig. 2：2-1-annular pressure pipe；12-device installs casing；2-2-upper casing head；2-3-tube head of trapping；
Embodiment
Below in conjunction with the accompanying drawings, the utility model will be further described：
As shown in Figure 1：The annular pressure monitoring of deep water hydrocarbon well well head and control device, including upper hydraulic cylinder 7, upper hydraulic pressure
Upper piston 1 in cylinder 7 connects the lower piston 5 in lower hydraulic cylinder 10 by piston rod 2；Upper hydraulic cylinder 7 is connected by connector 8
Lower hydraulic cylinder 10；Pressure relief opening 4 is provided with the side wall of lower hydraulic cylinder 10；Compression packing element 9, compression are provided with lower hydraulic cylinder 10
The bottom of packing element 9 is provided with annular piston 3, and annular piston 3 connects lower piston 5, spring 5 and compressible packing element 9 by spring 11
The system of composition ensure that the leakproofness of device, improve the reliability of system as pressure buffer structure；Lower hydraulic cylinder 10
Multiple annular pressure pipe 2-2 that bottom connecting device 12 surrounding of installation casing is set；The annular fluid of device installation casing 12 enters
Pressure sensor 13 is installed, pressure sensor 13 is used to detect subsea wellheads casing annulus pressure in real time, and generates phase at mouthful
The annular pressure signal answered；The output terminal connection logic control system 15 of pressure sensor 13, the output of logic control system 15
End connection hydraulic pump 14, the oil inlet of the upper hydraulic cylinder 7 of oil outlet connection of hydraulic pump 14.
With reference to shown in Fig. 2, device installation casing 12 is connected to upper casing head 2-2 between the tube head 2-3 that traps with flange,
Device 12 surrounding of installation casing installs 4 annular pressure control apparatus 2-1.
The operation principle of the utility model：
Releasing pressure automatically：When the pressure of device installation 12 inlet fluid of casing is higher than default pressure upper limit value, fluid
Promote lower piston 5 to move up, enable flow through pressure relief opening 4 and flow out, carry out pressure release；Lower piston 5 compresses while moving up
Spring 11, spring 11 cause annular piston 3 to move up again, partial pressure are passed to compression packing element 9, so as to annular pressure
Play the role of buffering, protection sleeve pipe safety.
Ftercompction：Pressure sensor 13 detects the pressure of 12 inlet of device installation casing in real time, and sensor will press
Force signal is transmitted to logic control system 15, and logic control system 15 carries out pressure signal and default threshold pression value pair
Than controlling hydraulic pump 14, when annular pressure signal is less than default pressure value, starting hydraulic pump 14 makes hydraulic cylinder 7 work,
Upper hydraulic cylinder 7 promotes upper piston 1 to move down, and upper piston 1 is connected with piston rod 2 and lower piston 5, and lower piston 5 makes annular again
The spring 11 installed between piston 3 and lower piston 5 stretches downwards, and spring 11 pulls downward on annular piston 3, and annular piston 3 is with connecting
Equipped with compression packing element between connector 8, the pressure three produced by pressure, 12 elastic force of spring and the compression packing element that hydraulic pump 4 is provided
Under person's collective effect so that the fluid press-in device in device is installed the annular pressure pipe 2-2 of casing 12 by lower piston 5, so that
Carry out ftercompction；Until when annular pressure signal reaches default threshold pression value, hydraulic pump is closed in the control of logic control system 15
14, stop ftercompction.
Claims (4)
1. the annular pressure monitoring of deep water hydrocarbon well well head and control device, including upper hydraulic cylinder (7), it is characterised in that upper liquid
Upper piston (1) in cylinder pressure (7) connects the lower piston (5) in lower hydraulic cylinder (10) by piston rod (2)；Upper hydraulic cylinder (7) is logical
Cross the lower hydraulic cylinder (10) of connector (8) connection；Pressure relief opening (4) is provided with the side wall of lower hydraulic cylinder (10)；Lower hydraulic cylinder (10)
Bottom connecting device installation casing (12) surrounding set multiple annular pressure pipes (2-1)；The ring of device installation casing (12)
Pressure sensor (13) is installed at empty fluid inlet；The output terminal connection logic control system 15 of pressure sensor (13), is patrolled
Collect the output terminal connection hydraulic pump (14) of control system (15), the oil inlet of the upper hydraulic cylinder (7) of oil outlet connection of hydraulic pump (14)
Mouthful.
2. the annular pressure monitoring of deep water hydrocarbon well well head according to claim 1 and control device, it is characterised in that institute
Compression packing element (9) is provided with the lower hydraulic cylinder (10) stated, the bottom of compression packing element (9) is provided with annular piston (3), and annular is living
Fill in (3) and lower piston (5) is connected by spring 11.
3. the annular pressure monitoring of deep water hydrocarbon well well head according to claim 1 and control device, it is characterised in that dress
The upper and lower ends for installing casing (12) are put by flanged joint in upper casing head (2-2) and tube head of trapping (2-3).
4. the annular pressure monitoring of deep water hydrocarbon well well head according to claim 1 and control device, it is characterised in that institute
The annular pressure pipe (2-1) that device installation casing (12) surrounding stated is set is provided with four.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720908561.0U CN207245702U (en) | 2017-07-25 | 2017-07-25 | The annular pressure monitoring of deep water hydrocarbon well well head and control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720908561.0U CN207245702U (en) | 2017-07-25 | 2017-07-25 | The annular pressure monitoring of deep water hydrocarbon well well head and control device |
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| CN207245702U true CN207245702U (en) | 2018-04-17 |
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| CN201720908561.0U Active CN207245702U (en) | 2017-07-25 | 2017-07-25 | The annular pressure monitoring of deep water hydrocarbon well well head and control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852365A (en) * | 2019-04-25 | 2020-10-30 | 中国石油天然气集团有限公司 | Wellhead pressure supplementing device and method |
-
2017
- 2017-07-25 CN CN201720908561.0U patent/CN207245702U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852365A (en) * | 2019-04-25 | 2020-10-30 | 中国石油天然气集团有限公司 | Wellhead pressure supplementing device and method |
| CN111852365B (en) * | 2019-04-25 | 2022-10-04 | 中国石油天然气集团有限公司 | Method for performing wellhead compensation operation by utilizing wellhead pressure compensating device |
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