GB2224545A - Process for pumping a multi-phase gas-liquid mixture by means of use of a pump - Google Patents
Process for pumping a multi-phase gas-liquid mixture by means of use of a pump Download PDFInfo
- Publication number
- GB2224545A GB2224545A GB8923581A GB8923581A GB2224545A GB 2224545 A GB2224545 A GB 2224545A GB 8923581 A GB8923581 A GB 8923581A GB 8923581 A GB8923581 A GB 8923581A GB 2224545 A GB2224545 A GB 2224545A
- Authority
- GB
- United Kingdom
- Prior art keywords
- functions
- vessel
- intake
- delivery
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 41
- 238000005086 pumping Methods 0.000 title claims abstract description 20
- 239000000203 mixture Substances 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 20
- 230000006835 compression Effects 0.000 claims abstract description 28
- 238000007906 compression Methods 0.000 claims abstract description 28
- 239000012071 phase Substances 0.000 claims description 21
- 239000007791 liquid phase Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000003208 petroleum Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 239000012530 fluid Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012360 testing method Methods 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Gas Separation By Absorption (AREA)
Abstract
Gas-liquid mixture in a line (10) from, say, a petroleum well is pumped out through a line (19), the pumping being effected by a system comprising a pump (17) and vessels (1, 2, 3). In operation each vessel undergoes intake, stand-by and compression/delivery phases. During the intake phase of each vessel, mixture is sucked thereinto by the pump 17, communication between the mixture line (10) and the suction side of the pump being established by opening of the appropriate valves (4-9, 11-16). At the same time the contents of another vessel is expelled to the delivery line (19) by liquid delivered by the pump, again by opening of the appropriate valves. <IMAGE>
Description
"PROCESS FOR PUMPING A MULTI-PHASE GAS-LIQUID MIXTURE BY
MEANS OF THE USE OF A PUHP" The present invention relates to a process for suppLing pressure energy to a multi-phase gas-liquid mixture, and in particular to a multi-phase fluid coming from a petroleum well, by means of the use of a pump as the thrust-supplying machine. The system can handle fluids also containing small amounts of solid particles, as a function of the amount of solids which is acceptable for the pump. The use of the present invention is above all referred to scenarios wherein a high reliability is required in the absence of attending personnel, and with a low maintenance frequency.Such scenarios may relate to submarine applications, or applications on non-attended offshore platforms, as well as to situations on land, with hostile environments, or environments which are difficult from a logistic viewpoint.
The presently available methods and systems for pumping a multi-phase gas-liquid mixture may be reconducted to the following categories:
A) methods and systems based on the separation of the
phases, followed by a machine (a pump) operating on
the liquid phase only, and a machine (a compressor)
operating on the gas phase only;
B) methods and systems based on the use of machines
(multi-phase "pumps"), directly capable of handling
the multi-phase mixture itself.
The systems belonging to the (A) category require the use of two machine types, one of which (the compressor) is characterized by a certain mechanical delicacy, and poor reliability.
The machines belonging to the (B) category are presently in an experimental stage. They require considerable development work and tests to be carried out before being able to reach an efficiency and a reliability at an industrial level.
We have found now a pumping process by means of the use of a conventional pump, which makes it possible the drawbacks which affect the prior art, as hereinabove mentioned, to be overcome.
The process for pumping a multi-phase gas-liquid mixture, according to the present invention, is characterized in that it uses a pump as the thrustsupplying machine, and at least two pumping vessels, which alternatively perform functions of intake and functions of compression and/or delivery.
Since the pump must only handle the liquid phase, it can be selected from among the conventional pumps, and in particular it can be a centrifugal pump.
In case only two vessels are used, they perform, always alternatively, functions of intake and functions of compression/delivery.
In case more than two vessels are used, a further stand-by function can be performed.
The present process is disclosed now, by referring to two particular operating modes.
The first operating mode uses two pumping vessels only, which alternatively perform functions of intake and functions of compression/delivery; and more than two vessels, which alternatively perform functions of intake, functions of compression/delivery, bnd standby functions.
Said first operating mode comprises the following steps: a) feeeding the multi-phase mixture, under the pressure
of the intake line, to the vessel performing the
intake functions, and acting as the gas-liquid phase
separator; b) sending the liquid separated inside the vessel
performing intake functions, to the pump, by means of
which it is pumped into the vessel, full of gas under
the intake pressure, which performs functions of
compression/delivery, causing the gas contained inside
said vessel to be compressed, until it reaches the
same pressure as of the delivery line; c) causing the compressed gas to leave the vessel
performing compression/delivery functions, followed by
an amount of liquid, which is the same as of the
system-entering liquid, with them being fed to the
delivery line.
For such a process type, the sequence, for each vessel, in case more than two vessels are used, can be: intake, stand-by, compression/delivery; or intake, compression/delivery, stand-by.
The second operating mode only uses more than two pumping vessels, which will alternatively perform functions of intake, functions of compression/stand-by, and functions of delivery.
Said second operating mode comprises the following steps: a) feeeding the multi-phase mixture, under the pressure
of the intake line, to the vessel performing intake
functions, and acting as the gas-liquid phase
separator; b) sending the liquid separated inside the vessel
performing intake functions, to the pump, by means of
which it is pumped into the vessel, full of gas
compressed at the delivery pressure, performing
functions of delivery, causing the compressed gas
contained inside said vessel to leave, followed by an
amount of Liquid, which is the same as of the system
entering Liquid, with said compressed gas and said
liquid being fed, after that a portion of the
compressed gas is subtracted and is fed into the
vessel performing compression/stand-by functions, to
the delivery line.
c) feeding to the vessel full of gas under the intake
pressure, peforming functions of compression/stand-by,
a portion of the already compressed gas, withdrawn
from the vessel performing delivery functions, causing
the contained inside said vessel gas to be compressed,
until the same pressure as of the delivery line is
reached.
For such an operating mode, the sequence, for each vessel is the following: intake, compression/stand-by, delivery.
In case a centrifugal pump is used, the use of (either pressure or flowrate controlling) regulation valves is necessary, in order to render the pump operating conditions as constant as possible.
The invention will be better disclosed with the aid of the diagrams of Figures 1, 2 and 3, which represent preferred forms of practical embodiments, using 3 pumping vessels and one centrifugal pump, and which are not to be considered as limitative of the same invention
The status of thee pumping vessels (1, 2 and 3) is determined by the status of the on/off valves (4, 5, 6, 7, 8, 9), which is governed by a dedicated electronic logic system.
Referring to Figure 1, let us consider, e.g., the case in which a vessel (1) is in its intake stage, the vessel (2) is in its stand-by stage, and the vessel (3) is in its compression/delivery stage. Under such conditions, the multi-phase fluid (10) enters the vessel (1) (through 11; the other valves 12, 13, 14, 15, 16 are closed), which acts as the gas/liquid separator, whilst the "liquid piston" through the valve (4) comes to the centrifugal pump (17) from which, through the flow-rate regulation or pressure regulation valve (18) and the valve (9), is pumped into the vessel (3) (initially full of gas under the intake pressure). The "liquid piston" entering the vessel (3) causes the therein contained gas to be compressed, until a same pressure as of the system delivery line is reached. Now, the valve (16) is opened, and the gas is sent to the delivery line (19), followed by an amount of liquid, which is the same as of the system-entering liquid. When the level of the liquid inside the vessel (1) reaches a suitable minimum value, the control logic will switch the status of the on/off valves. The vessel 1 turns into a stand-by status (valve 4 is closed), the vessel (3) switches into its intake condition (valve 8 is opened; valve 9 is closed), the vessel (2) switches into compression/delivery conditions (valve 7 is opened). Such a sequence is repeated, thus making it possible a continuous stream of liquid to flow through the pump (17) which, thanks to the action of the regulation valve, (18), operates under nearly steady conditions. No diaphragms or separation bodies are provided between the "liquid piston" and the multi-phase fluid.
The system can also work according to a different operating cycle, which, instead of the intake/standby/compression-delivery sequence (for each vessel) accomplishes the intake/compression-delivery/stand-by sequence.
An alternative configuration of the system of Figure 1 is depicted in Figure 2.
Let us consider, e.g., the case in which the vessel (1) is in its intake stage, the vessel (2) is in its deLivery stage and the vessel (3) is in its compression/stand-by stage.
The multi-phase fluid (10) enters the vessel (1) (through the valve 11: the other valves 12, 13, 14, 15 and 16 are closed), which acts as the gas/liquid separator, whilst the "liquid piston" through the valve (4) comes to the centrifugal pump (17), the correct operation of which is ensured by the regulator valves (20), (21) and (22), which maintain constant the delivery pressure of the pump.
The compression step is accomplished by means of the delivery of a portion of the gas phase from the delivery vessel (2) through the regulation valve (21), to the vessel in the compression stage (3), until inside this latter vessel the delivery pressure is reached.
The "liquid piston" is pumped into (2) through the valve (7), and in this stage it performs the function of sending a portion of the compressed gas to the vessel (3) through (21), and the remainder portion thereof to the delivery line (19) through the valve (14), followed by an amount of liquid, which the same as of the systementering liquid.
When the level of the liquid inside the vessel (1) reaches a suitable minimum value, the control logic will switch the status of the on/off valves. The vessel (1) turns into its compression/stand-by status (valves 4 and 11 are closed); the vessel (2) switches into intake condition (valves 13 and 6 are open, 14 and 7 are closed); the vessel (3) turns into its delivery status.
A further alternative configuration is shown in the simplified diagram of Figure 3.
In such a diagram, a gas-liquid separator (23) is added.
This makes it possible only gas to be sent to the upper inlet of pumping vessels, whilst the liquid is directly sent to the intake port of the centrifugal pump (17).
As for the rest, the operation of the diagram shown in Figure 3 is similar to as disclosed for the diagram shown in Figure 1.
The configuration shown in Figure 3 transfers the function of phase (gas/liquid) separation from the pumping vessels (1, 2 and 3) to the separator (23).
An alternative possibility, valid for both of the diagrams of Figure 1 and Figure 3, consists in using, instead of one single regulation valve, three regulation valves (one valve per each pumping vessel), installed in cascade to the on/off valves (5, 7, 9).
One should observe that the pumping vessels can be given various configurations (horizontal, vertical vessel, and so forth), according to the process plan adopted (and consequently of the functions which the same vessels are required to perform), and of the characteristics of the processed fluids. For example, for the diagram of Figure 3, since the pumping vessel must not act as a phase separator too, its reference configuration is that of a vertical vessel.
The number of the pumping vessels can be both increased and reduced (to two vessels), in this latter case a higher functional irregularity having to be accepted.
Claims (9)
1. Process for pumping a multi-phase gas-liquid mixture, characterized in that it uses a pump as the thrust-supplying machine, and at least two pumping vessels, which alternatively perform functions of intake and functions of compression and/or delivery.
2. Process according to claim 1, wherein the pumpimg vessels are two, and alternatively perform functions of intake and functions of compression/delivery.
3. Process according to claim 1, wherein the pumpimg vessels are more than two, and perform, alternatively in sequence, functions of intake, stand-by functions and functions of compression/delivery.
4. Process according to claim 1, wherein the pumpimg vessels are more than two, and perform, alternatively in sequence, functions of intake, functions of compression/delivery, and stand-by functions.
5. Process according to claim 1, wherein the pumpimg vessels are more than two, and perform, alternatively in sequence, functions of intake, functions of compression/stand-by and delivery functions.
6. Process according to claim 2 or 3 or 4, comprising the following steps: a) feeeding the multi-phase mixture, under the pressure
of the intake line, to the vessel performing intake
functions, and acting as the gas-liquid phase
separator; b) sending the liquid separated inside the vessel
performing intake functions, to the pump, by means of
which it is pumped into the vessel, full of gas under
the intake pressure, which performs functions of
compression/delivery, causing the gas contained inside
said vessel to be compressed, until it reaches the
same pressure as of the delivery line; c) causing the compressed gas to leave the vessel
performing compression/deLivery functions, followed by
an amount of liquid, which is the same as of the
system-entering Liquid, with them being fed to the
delivery line.
7. Process according to claim 5, comprising the following steps: a) feeeding the multi-phase mixture, under the pressure
of the intake line, to the vessel performing intake
functions, and acting as the gas-liquid phase
separator; b) sending the liquid separated inside the vessel
performing intake functions, to the pump, by means of
which it is pumped into the vessel, full of gas
compressed at the delivery pressure, performing
functions of delivery, causing the compressed gas
contained inside said vessel to leave, followed by an
amount of liquid, which is the same as of the system
entering liquid, with said compressed gas and said
liquid being fed, after that a portion of the
compressed gas is subtracted and is fed into the
vessel performing compression/stand-by functions, to
the delivery line.
c) feeding to the vessel full of gas under the intake
pressure, performing functions of compression/stand
by, a portion of the already compressed gas, withdrawn
from the vessel performing delivery functions, causing
the gas contained inside said vessel to be compressed,
until the same pressure as of the delivery line is
reached.
8. Process according to claim 2 or 3 or 4 or 5 or 6, wherein a gas-liquid separator is added upstream the pumping vessels, with, in such a way, the task of acting as a phase separator being transferred from the vessel which performs the intake functions to the same separator, it being made it possible only gas to be sent to the vessel which performs intake functions, and the liquid to be directly sent to the pump.
9. Process according to claim 1, wherein the pump is a centrifugal pump, with regulation valves being used in order to render the operating conditions of the same pump as constant as possible.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8822450A IT1229858B (en) | 1988-10-28 | 1988-10-28 | PROCEDURE FOR PUMPING A MULTI-PHASE LIQUID GAS MIXTURE BY USING A PUMP |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8923581D0 GB8923581D0 (en) | 1989-12-06 |
| GB2224545A true GB2224545A (en) | 1990-05-09 |
| GB2224545B GB2224545B (en) | 1993-04-07 |
Family
ID=11196465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8923581A Expired - Fee Related GB2224545B (en) | 1988-10-28 | 1989-10-19 | Process for pumping a multi-phase gas-liquid mixture by means of the use of a pump |
Country Status (11)
| Country | Link |
|---|---|
| CN (4) | CN1022130C (en) |
| BR (1) | BR8905522A (en) |
| CA (1) | CA2001685A1 (en) |
| DK (1) | DK536689A (en) |
| FI (1) | FI895099A0 (en) |
| GB (1) | GB2224545B (en) |
| IT (1) | IT1229858B (en) |
| MX (1) | MX171488B (en) |
| NL (1) | NL193543C (en) |
| NO (1) | NO302842B1 (en) |
| SE (1) | SE8903498L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385009B (en) * | 2002-02-11 | 2006-02-01 | Abb Offshore Systems As | Subsea production system |
| GB2417438A (en) * | 2002-02-11 | 2006-03-01 | Vetco Aibel As | A subsea well fluid processing system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8950195B2 (en) * | 2010-12-18 | 2015-02-10 | The Boeing Company | Continuous flow thermodynamic pump |
| CN104265596B (en) * | 2014-08-28 | 2017-04-05 | 陶德明 | High-pressure gas-liquid mixing piston pump and using method |
| WO2021046979A1 (en) * | 2019-09-11 | 2021-03-18 | 广东美的制冷设备有限公司 | Air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1280121A (en) * | 1969-01-20 | 1972-07-05 | Haggie Rand Ltd Formerly Afric | Improvements in or relating to the pumping of fluids |
| GB1441010A (en) * | 1972-11-02 | 1976-06-30 | Mitsubishi Kizonku Kogyo Kk | Liquid-piston type slurry pumping system |
| US4321016A (en) * | 1979-04-04 | 1982-03-23 | Hitachi, Ltd. | Apparatus for continuous slurry displacement transfer |
-
1988
- 1988-10-28 IT IT8822450A patent/IT1229858B/en active
-
1989
- 1989-10-19 GB GB8923581A patent/GB2224545B/en not_active Expired - Fee Related
- 1989-10-23 SE SE8903498A patent/SE8903498L/en not_active Application Discontinuation
- 1989-10-25 BR BR898905522A patent/BR8905522A/en not_active IP Right Cessation
- 1989-10-25 MX MX018101A patent/MX171488B/en unknown
- 1989-10-26 NO NO894265A patent/NO302842B1/en not_active IP Right Cessation
- 1989-10-27 NL NL8902673A patent/NL193543C/en not_active IP Right Cessation
- 1989-10-27 CA CA002001685A patent/CA2001685A1/en not_active Abandoned
- 1989-10-27 DK DK536689A patent/DK536689A/en not_active Application Discontinuation
- 1989-10-27 FI FI895099A patent/FI895099A0/en not_active IP Right Cessation
- 1989-10-28 CN CN89108194.1A patent/CN1022130C/en not_active Expired - Fee Related
-
1993
- 1993-02-16 CN CN93101044.6A patent/CN1031424C/en not_active Expired - Fee Related
- 1993-02-16 CN CN93101046.2A patent/CN1025886C/en not_active Expired - Fee Related
- 1993-02-16 CN CN93101045.4A patent/CN1026026C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1280121A (en) * | 1969-01-20 | 1972-07-05 | Haggie Rand Ltd Formerly Afric | Improvements in or relating to the pumping of fluids |
| GB1441010A (en) * | 1972-11-02 | 1976-06-30 | Mitsubishi Kizonku Kogyo Kk | Liquid-piston type slurry pumping system |
| US4321016A (en) * | 1979-04-04 | 1982-03-23 | Hitachi, Ltd. | Apparatus for continuous slurry displacement transfer |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2385009B (en) * | 2002-02-11 | 2006-02-01 | Abb Offshore Systems As | Subsea production system |
| GB2417438A (en) * | 2002-02-11 | 2006-03-01 | Vetco Aibel As | A subsea well fluid processing system |
| GB2417438B (en) * | 2002-02-11 | 2006-06-28 | Vetco Aibel As | Subsea production system |
| US7175748B2 (en) | 2002-02-11 | 2007-02-13 | Vetco Aibel As | Subsea production system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1026026C (en) | 1994-09-28 |
| DK536689A (en) | 1990-04-29 |
| NO894265D0 (en) | 1989-10-26 |
| NL193543C (en) | 2000-01-04 |
| CN1077526A (en) | 1993-10-20 |
| IT1229858B (en) | 1991-09-13 |
| NL193543B (en) | 1999-09-01 |
| MX171488B (en) | 1993-10-29 |
| SE8903498L (en) | 1990-04-29 |
| DK536689D0 (en) | 1989-10-27 |
| IT8822450A0 (en) | 1988-10-28 |
| CA2001685A1 (en) | 1990-04-28 |
| CN1025886C (en) | 1994-09-07 |
| NO894265L (en) | 1990-04-30 |
| CN1042227A (en) | 1990-05-16 |
| CN1022130C (en) | 1993-09-15 |
| SE8903498D0 (en) | 1989-10-23 |
| CN1077525A (en) | 1993-10-20 |
| NO302842B1 (en) | 1998-04-27 |
| FI895099A0 (en) | 1989-10-27 |
| CN1031424C (en) | 1996-03-27 |
| BR8905522A (en) | 1990-05-29 |
| GB2224545B (en) | 1993-04-07 |
| NL8902673A (en) | 1990-05-16 |
| GB8923581D0 (en) | 1989-12-06 |
| CN1083182A (en) | 1994-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20001019 |