CA2568212A1 - Reactivaiting gas wells - Google Patents
Reactivaiting gas wells Download PDFInfo
- Publication number
- CA2568212A1 CA2568212A1 CA002568212A CA2568212A CA2568212A1 CA 2568212 A1 CA2568212 A1 CA 2568212A1 CA 002568212 A CA002568212 A CA 002568212A CA 2568212 A CA2568212 A CA 2568212A CA 2568212 A1 CA2568212 A1 CA 2568212A1
- Authority
- CA
- Canada
- Prior art keywords
- water
- casing
- well
- gas
- packers
- 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.)
- Abandoned
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 54
- 230000002706 hydrostatic effect Effects 0.000 abstract description 4
- 238000005086 pumping Methods 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
- E21B33/1243—Units with longitudinally-spaced plugs for isolating the intermediate space with inflatable sleeves
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/13—Lifting well fluids specially adapted to dewatering of wells of gas producing reservoirs, e.g. methane producing coal beds
Abstract
To reactivate the abandoned watered-out gas wells by conventional method, the water inside the well-casing is removed by means of a water pump to reduce the water hydrostatic pressure, allowing the gases coming from a reservoir entering the well-casing and flowing to the surface of the well to be recovered. The pump must run continuously and have the capacity to pump the existing water in the well and also the water coming from the reservoir. This method is slow, costly and, at low gas prices, may not be feasible.
The new invention is based on reduction of the water level in the well-casing to a possible minimum and maintaining this level continuously by using inflatable packers and a pump. The bottom part of the well-casing is divided into three sections using these packers. A long tube (tubing), with a submersible water-pump at its end, is placed in the well-casing. This tubing protrudes trough the packers and is used for pumping the water out of the casing. A short water-pipe also protrudes through these packers and is used in connecting the upper part of the casing with the lower section. A one-way valve mounted on the water-pipe prevents the reverse flow of water and gas into the upper part of the casing. A modulating-valve mounted on the upper packer controls the water-level and passes the gas from the upper section, under the upper packer, to the upper part of the casing. By starting the water-pump, the water inside the upper part of the casing is removed through the water-pipe and from the lower section. After removal of the water from the upper part of the casing, the two lower packers will be deflated thereby the gas and water from the reservoir fill the entire three sections below the upper packer. When the gas is collected on top of the water under the upper packer and the pressure increases, then the water is pushed downward to a certain level. This level will be changed by pressure fluctuation and is controlled and maintained by using available devices for water-level control. By a certain adjusted pressure for controlling the water-level, the modulating-valve opens and allows the gas collected below the upper packer, on top of the water, to be passed into the upper part of the casing and collected there. The recovered gas will then be passed through a well-head valve into a compression facility and/or into a pipeline.
The new invention is based on reduction of the water level in the well-casing to a possible minimum and maintaining this level continuously by using inflatable packers and a pump. The bottom part of the well-casing is divided into three sections using these packers. A long tube (tubing), with a submersible water-pump at its end, is placed in the well-casing. This tubing protrudes trough the packers and is used for pumping the water out of the casing. A short water-pipe also protrudes through these packers and is used in connecting the upper part of the casing with the lower section. A one-way valve mounted on the water-pipe prevents the reverse flow of water and gas into the upper part of the casing. A modulating-valve mounted on the upper packer controls the water-level and passes the gas from the upper section, under the upper packer, to the upper part of the casing. By starting the water-pump, the water inside the upper part of the casing is removed through the water-pipe and from the lower section. After removal of the water from the upper part of the casing, the two lower packers will be deflated thereby the gas and water from the reservoir fill the entire three sections below the upper packer. When the gas is collected on top of the water under the upper packer and the pressure increases, then the water is pushed downward to a certain level. This level will be changed by pressure fluctuation and is controlled and maintained by using available devices for water-level control. By a certain adjusted pressure for controlling the water-level, the modulating-valve opens and allows the gas collected below the upper packer, on top of the water, to be passed into the upper part of the casing and collected there. The recovered gas will then be passed through a well-head valve into a compression facility and/or into a pipeline.
Description
DESCRIPTION
After a certain time of gas production from gas reservoir, using the natural reservoir pressure drive, the reservoir pressure reduces to a level where this pressure is lower than the hydrostatic pressure of water in the well-casing. Under these conditions, the water does not allow the gas to flow to the surface by the reservoir pressure. In the gas industry this phenomena is called "watered-out gas-well" and it will be abandoned. By conventional methods, for re-activating these wells, the water inside the well-casing is removed allowing the gas from the reservoir entering the well-casing and can be recovered. For removal of the water from the casing, different kinds of water-pumps or other methods are used. In this case, at the beginning and by startup, the pump must have a high capacity to be able to pump the water out of the well-casing and also the water coming from the reservoir. To maintain low water-level, the pump must be continuously active in order to pump the water out of the casing. This process is very slow and costly.
The new invention:
By the new invention, the bottom part of the well-casing is divided into three sections and each section is separated by means of using inflatable packers. A long tubing is placed inside the casing with a submersible pump at its bottom end. The tubing protrudes through the three packers, and the top end is connected to the well-head. This system is used for pumping the water out of the well-casing. A short water-pipe protrudes through the same three packers to connect the upper part of the casing to the lower section of the divided lower part. This water-pipe is equipped with a non-return valve to avoid water and gas passing from the lower section at the bottom into the upper part of the well-casing. The upper packer is equipped with a modulating valve to keep the water at a suitable level. At the beginning of the process, all the three packers are inflated, separating the three sections and avoiding leakages from one of the sections into the other. When the pump is activated, the water over the upper packer in the casing will flow through the water-pipe toward the bottom of the casing into the lower section and is pumped out through the water-tubing. This procedure continues until the water over the upper packer in the well-casing and also in the bottom section is pumped out.
At this time, the middle and the lower packers will be deflated making the three sections into one section thereby allowing the gas and water, from the perforated section of the casing, to enter into the casing below the upper packer. At this stage, the water and gas coming from the reservoir fill the whole area below the upper packer. The gas flows upward and is collected under the upper packer pushing the water downward to a certain level. This level will be changed by pressure fluctuation and is controlled and maintained by means of available modulating valves and level-sensing devices. The modulating valve is placed on the upper packer and is equipped with a non-return feature which allows the gas to pass into the upper part of the casing. The pressure is then pre-adjusted for controlling the water-level. When the modulating-valve opens, the collected gas passes into the upper part of the casing. The recovered gas in the casing is then passed through a gas control-valve outside the casing, into a connected pipeline for further processing.
Description of the drawings:
Fig. I is a front cross-sectional view of an active gas-well in operation showing:
a) a well-casing (1) for collecting gas and prevention of gas leakage into the well-walls, the casing is partly perforated (2) in the gas reservoir areas and is closed with a well-head (3) for preventing gas to flow out of the casing;
b) a well-tubing (4) for gas flowing to the surface; the tubing is held in the well-casing by means of numbers of tubing holders (24, 25) and is prepared with a gas-pipe system consisting of a gas-pipe (5) on top of the tubing which is connected to a modulating-valve (6) at the end of the same pipe (5) for controlling the gas pressure and gas-flow (7);
c) gas flow (8) coming from gas the reservoir;
d) gas flow (9) inside the casing (1) and inside the tubing (12);
e) water flow (10) and water-level (11).
Fig. 2 is a front cross-sectional view of a gas-well according to the Fig. 1 showing additional equipment arrangement for watered-out wells conventional gas recovery method, including:
a) a water-pump (13) for pumping the water out (14);
b) water-level (15) before water is pumped out;
c) Water-level (16) after water is pumped out.
In this case, the gas-pipe system (5, 6, 7) is mounted on the side of the well-tubing (4).
Fig. 3 is a front cross-sectional view of watered-out gas-well according to Fig. 2 with additional equipment arrangement according to the new invention including:
a) upper packer (17) separating the casing upper part (L1) and the lower part (L2); the upper packer (17) is prepared with a control-valve (21) to control the reduced water to a low level (16) and maintain it within a suitable range;
b) middle packer (18) to avoid, by startup, gas (9) and water (10) coming from gas reservoir (8) entering the upper section (U);
c) lower packer (19) to avoid the exchange of gas/water between middle section (M) and bottom section (B);
d) a short water-pipe (20) protrudes through the three packers (17,18,19) and is prepared with a one-way valve (22) to allow the water flow (23) into the tubing (20) and entering the bottom section (B), but avoiding reverse flow of the water.
Fig. 4 is a front cross-sectional view of watered-out gas-well according to Fig. 3 after the three inflatable packers (17, 18, 19) are deflated according to the new invention.
The Operation Procedures:
A- The operation of the active gas-wells:
After drilling a gas-well, the casing (1), is placed into the well to stabilize the well-walls and by high gas pressure avoiding leakages of gas from inside the well into the well-walls reducing the amount of gas to be recovered. A part of the casing is perforated (2) for gas entering the casing (1). The gas (8) enters the casing (1) through perforation part (2) of the casing (1) and flows (9) toward surface until the well-casing (1) and the tubing (4) are filled with gas. By increasing gas pressure inside the well-casing (1) and opening the gas-valve (6), the gas (9) inside the well-casing (1) passes (12) the tubing (4), the gas-pipe (5), control-valve (6) and thereafter, flows (7) out of the system into a pipeline for further processing and use.
B- The conventional operation after the gas-well is watered-out:
After a certain time of gas production, the amount of produced water increases and the water-level (Fig. 1, # 11) in the casing.(1) goes higher to a level (Fig. 2, #15) and the water hydrostatic pressure does not allow the gas (8) from the reservoir to pass the perforation (2) and enter into the well-casing (1). To reduce the water hydrostatic pressure, the water-level (15) must be lowered to a level (16) by removing water from the casing (1). The pump (13) mounted on the bottom of the tubing (4) pumped the water (10) into the tubing (4) and from there the water (12) flows to the surface (14) and out of the well-casing (1). The gas (9) flows upward through the reduced water column, passes the water-level and is collected in the casing (1) above the water-level.
After opening the valve (6), the gas passes through the pipe (5) and out of the system into a pipeline for further processing and use.
C- The operation after a gas-well is watered-out using the New Invention Method:
For reactivating a watered-out gas-well, three inflatable packers (17, 18, 19) are placed at the bottom of the well-casing (1) with a certain distance from each other for dividing the bottom part (L2) of the well-casing (1) in three sections: upper (U), middle (M) and bottom (B). The long well-tubing (4) placed inside the well-casing (1), equipped with the water-pump (13) at its bottom for pumping the collected water from the casing (1). The said tubing is supported by means of numbers of tubing holders (24) along the well-casing (1) and protrudes the three packers (17, 18, 19). The short water-pipe (20) supported by a few pipe and tubing holders (25), equipped with the one-way valve (22), protrudes also through the three packers (17, 18, 19) connecting the upper part (L 1) of the well-casing (1) with the bottom section (B) of the lower part (L2) of the casing. The one-way valve (22), mounted on the water-pipe (20), prevents water from the bottom section (B) entering the upper part (L 2) of the well-casing (1). The modulating-valve (21) mounted on the upper packer (17) controls the water level (16) by means of gas pressure and/or a water-level control device. By startup, all three packers (Fig. 3, #
17, 18, 19) are inflated, the pump (13) is activated and pumps the water (23) from upper part (L 1) of the casing (1) out through the one-way valve (22), the water-pipe (20) and the bottom section (B). After the water from the upper part (L1) of the casing (1) is pumped out and the water-level (15) is lowered down to the upper packer (17), the pump (13) is shut down, the middle packer (Fig. 4, #18) and lower packer (Fig. 4, #19) are then deflated turning the three sections (U, M, B) into one large section as the lower part (Fig. 4, L2) of the casing (1). The gases (8) from the reservoir enter the casing (1) through perforation part (2) and flow upward (9) and is collected under the upper packer on top of the water inside the lower part (L2) of the well-casing (1). With increasing the gas pressure inside the lower part (L2) of the casing (1) under the packer (17) the water-level lowers down.
This level (16) will be changed, going up and down, by fluctuation of the gas pressure.
To maintain a suitable range for the water-level (16) the modulating-valve (21) is pre-adjusted. By certain pressure the valve (21) opens and the collected gas under the packer (17) enters the upper part (U) of the well-casing (1) and is collected there until the control-valve (6) is opened and the collected gas passes the gas-pipe (5), the control-valve (6) outside the well-casing (1) and flows out (7) into a pipeline for further processing and use.
During the gas recovery, some water (10) enters the casing (1) as well which increases the water-level (16). At this time, the water-pump (13) is reactivated and the surplus water can be pumped out.
After a certain time of gas production from gas reservoir, using the natural reservoir pressure drive, the reservoir pressure reduces to a level where this pressure is lower than the hydrostatic pressure of water in the well-casing. Under these conditions, the water does not allow the gas to flow to the surface by the reservoir pressure. In the gas industry this phenomena is called "watered-out gas-well" and it will be abandoned. By conventional methods, for re-activating these wells, the water inside the well-casing is removed allowing the gas from the reservoir entering the well-casing and can be recovered. For removal of the water from the casing, different kinds of water-pumps or other methods are used. In this case, at the beginning and by startup, the pump must have a high capacity to be able to pump the water out of the well-casing and also the water coming from the reservoir. To maintain low water-level, the pump must be continuously active in order to pump the water out of the casing. This process is very slow and costly.
The new invention:
By the new invention, the bottom part of the well-casing is divided into three sections and each section is separated by means of using inflatable packers. A long tubing is placed inside the casing with a submersible pump at its bottom end. The tubing protrudes through the three packers, and the top end is connected to the well-head. This system is used for pumping the water out of the well-casing. A short water-pipe protrudes through the same three packers to connect the upper part of the casing to the lower section of the divided lower part. This water-pipe is equipped with a non-return valve to avoid water and gas passing from the lower section at the bottom into the upper part of the well-casing. The upper packer is equipped with a modulating valve to keep the water at a suitable level. At the beginning of the process, all the three packers are inflated, separating the three sections and avoiding leakages from one of the sections into the other. When the pump is activated, the water over the upper packer in the casing will flow through the water-pipe toward the bottom of the casing into the lower section and is pumped out through the water-tubing. This procedure continues until the water over the upper packer in the well-casing and also in the bottom section is pumped out.
At this time, the middle and the lower packers will be deflated making the three sections into one section thereby allowing the gas and water, from the perforated section of the casing, to enter into the casing below the upper packer. At this stage, the water and gas coming from the reservoir fill the whole area below the upper packer. The gas flows upward and is collected under the upper packer pushing the water downward to a certain level. This level will be changed by pressure fluctuation and is controlled and maintained by means of available modulating valves and level-sensing devices. The modulating valve is placed on the upper packer and is equipped with a non-return feature which allows the gas to pass into the upper part of the casing. The pressure is then pre-adjusted for controlling the water-level. When the modulating-valve opens, the collected gas passes into the upper part of the casing. The recovered gas in the casing is then passed through a gas control-valve outside the casing, into a connected pipeline for further processing.
Description of the drawings:
Fig. I is a front cross-sectional view of an active gas-well in operation showing:
a) a well-casing (1) for collecting gas and prevention of gas leakage into the well-walls, the casing is partly perforated (2) in the gas reservoir areas and is closed with a well-head (3) for preventing gas to flow out of the casing;
b) a well-tubing (4) for gas flowing to the surface; the tubing is held in the well-casing by means of numbers of tubing holders (24, 25) and is prepared with a gas-pipe system consisting of a gas-pipe (5) on top of the tubing which is connected to a modulating-valve (6) at the end of the same pipe (5) for controlling the gas pressure and gas-flow (7);
c) gas flow (8) coming from gas the reservoir;
d) gas flow (9) inside the casing (1) and inside the tubing (12);
e) water flow (10) and water-level (11).
Fig. 2 is a front cross-sectional view of a gas-well according to the Fig. 1 showing additional equipment arrangement for watered-out wells conventional gas recovery method, including:
a) a water-pump (13) for pumping the water out (14);
b) water-level (15) before water is pumped out;
c) Water-level (16) after water is pumped out.
In this case, the gas-pipe system (5, 6, 7) is mounted on the side of the well-tubing (4).
Fig. 3 is a front cross-sectional view of watered-out gas-well according to Fig. 2 with additional equipment arrangement according to the new invention including:
a) upper packer (17) separating the casing upper part (L1) and the lower part (L2); the upper packer (17) is prepared with a control-valve (21) to control the reduced water to a low level (16) and maintain it within a suitable range;
b) middle packer (18) to avoid, by startup, gas (9) and water (10) coming from gas reservoir (8) entering the upper section (U);
c) lower packer (19) to avoid the exchange of gas/water between middle section (M) and bottom section (B);
d) a short water-pipe (20) protrudes through the three packers (17,18,19) and is prepared with a one-way valve (22) to allow the water flow (23) into the tubing (20) and entering the bottom section (B), but avoiding reverse flow of the water.
Fig. 4 is a front cross-sectional view of watered-out gas-well according to Fig. 3 after the three inflatable packers (17, 18, 19) are deflated according to the new invention.
The Operation Procedures:
A- The operation of the active gas-wells:
After drilling a gas-well, the casing (1), is placed into the well to stabilize the well-walls and by high gas pressure avoiding leakages of gas from inside the well into the well-walls reducing the amount of gas to be recovered. A part of the casing is perforated (2) for gas entering the casing (1). The gas (8) enters the casing (1) through perforation part (2) of the casing (1) and flows (9) toward surface until the well-casing (1) and the tubing (4) are filled with gas. By increasing gas pressure inside the well-casing (1) and opening the gas-valve (6), the gas (9) inside the well-casing (1) passes (12) the tubing (4), the gas-pipe (5), control-valve (6) and thereafter, flows (7) out of the system into a pipeline for further processing and use.
B- The conventional operation after the gas-well is watered-out:
After a certain time of gas production, the amount of produced water increases and the water-level (Fig. 1, # 11) in the casing.(1) goes higher to a level (Fig. 2, #15) and the water hydrostatic pressure does not allow the gas (8) from the reservoir to pass the perforation (2) and enter into the well-casing (1). To reduce the water hydrostatic pressure, the water-level (15) must be lowered to a level (16) by removing water from the casing (1). The pump (13) mounted on the bottom of the tubing (4) pumped the water (10) into the tubing (4) and from there the water (12) flows to the surface (14) and out of the well-casing (1). The gas (9) flows upward through the reduced water column, passes the water-level and is collected in the casing (1) above the water-level.
After opening the valve (6), the gas passes through the pipe (5) and out of the system into a pipeline for further processing and use.
C- The operation after a gas-well is watered-out using the New Invention Method:
For reactivating a watered-out gas-well, three inflatable packers (17, 18, 19) are placed at the bottom of the well-casing (1) with a certain distance from each other for dividing the bottom part (L2) of the well-casing (1) in three sections: upper (U), middle (M) and bottom (B). The long well-tubing (4) placed inside the well-casing (1), equipped with the water-pump (13) at its bottom for pumping the collected water from the casing (1). The said tubing is supported by means of numbers of tubing holders (24) along the well-casing (1) and protrudes the three packers (17, 18, 19). The short water-pipe (20) supported by a few pipe and tubing holders (25), equipped with the one-way valve (22), protrudes also through the three packers (17, 18, 19) connecting the upper part (L 1) of the well-casing (1) with the bottom section (B) of the lower part (L2) of the casing. The one-way valve (22), mounted on the water-pipe (20), prevents water from the bottom section (B) entering the upper part (L 2) of the well-casing (1). The modulating-valve (21) mounted on the upper packer (17) controls the water level (16) by means of gas pressure and/or a water-level control device. By startup, all three packers (Fig. 3, #
17, 18, 19) are inflated, the pump (13) is activated and pumps the water (23) from upper part (L 1) of the casing (1) out through the one-way valve (22), the water-pipe (20) and the bottom section (B). After the water from the upper part (L1) of the casing (1) is pumped out and the water-level (15) is lowered down to the upper packer (17), the pump (13) is shut down, the middle packer (Fig. 4, #18) and lower packer (Fig. 4, #19) are then deflated turning the three sections (U, M, B) into one large section as the lower part (Fig. 4, L2) of the casing (1). The gases (8) from the reservoir enter the casing (1) through perforation part (2) and flow upward (9) and is collected under the upper packer on top of the water inside the lower part (L2) of the well-casing (1). With increasing the gas pressure inside the lower part (L2) of the casing (1) under the packer (17) the water-level lowers down.
This level (16) will be changed, going up and down, by fluctuation of the gas pressure.
To maintain a suitable range for the water-level (16) the modulating-valve (21) is pre-adjusted. By certain pressure the valve (21) opens and the collected gas under the packer (17) enters the upper part (U) of the well-casing (1) and is collected there until the control-valve (6) is opened and the collected gas passes the gas-pipe (5), the control-valve (6) outside the well-casing (1) and flows out (7) into a pipeline for further processing and use.
During the gas recovery, some water (10) enters the casing (1) as well which increases the water-level (16). At this time, the water-pump (13) is reactivated and the surplus water can be pumped out.
Claims (12)
1- A method of reactivating watered-out gas-wells for gas production from gas reservoirs comprising:
a) three inflatable packers placed at the bottom of the well-casing in certain distances to create four compartments, separated from each other in sections, in such a way that the middle section covers the perforated part of the well-casing and the upper packer divides the well-casing into upper and lower parts of the said well-casing;
b) a modulating-valve mounted on the said upper packer for controlling water-level in the lower part of the casing c) a long tubing inside the well-casing protruded through the said three packers is equipped with a water-pump at its bottom for removal of water from the well-casing;
d) a short water-pipe protruded through the said three packers connects the space of the upper part of the well-casing, above the said upper packer, with the bottom section under the lower packer;
e) a one-way valve mounted on the said short water-pipe for water flow from the upper part of the casing into the bottom section under the said lower packer and to avoid water flowing in reverse into the said upper part of the well-casing;
f) a pipe-system consisting of:
i) a gas-pipe connected to the well-head;
ii) to a gas control-valve connected onside to the said gas-pipe and the other side to a pipeline.
a) three inflatable packers placed at the bottom of the well-casing in certain distances to create four compartments, separated from each other in sections, in such a way that the middle section covers the perforated part of the well-casing and the upper packer divides the well-casing into upper and lower parts of the said well-casing;
b) a modulating-valve mounted on the said upper packer for controlling water-level in the lower part of the casing c) a long tubing inside the well-casing protruded through the said three packers is equipped with a water-pump at its bottom for removal of water from the well-casing;
d) a short water-pipe protruded through the said three packers connects the space of the upper part of the well-casing, above the said upper packer, with the bottom section under the lower packer;
e) a one-way valve mounted on the said short water-pipe for water flow from the upper part of the casing into the bottom section under the said lower packer and to avoid water flowing in reverse into the said upper part of the well-casing;
f) a pipe-system consisting of:
i) a gas-pipe connected to the well-head;
ii) to a gas control-valve connected onside to the said gas-pipe and the other side to a pipeline.
2- A method according to Claim 1 that water is removed from the well-casing by other means for water removal;
3- A method according to Claim 1-b that the water-level in the lower part of the well-casing is controlled by other means and devices;
4- A method according to Claim 1-c that any kind of devices are used to automatically reactivate the said water-pump by per- adjusted level-range and/or gas-pressure inside the lower part of the well casing;
5- A method according to Claim 1 that the inflatable packers are placed anywhere suitable for this method;
6- A method according to Claims 1 and 5 that the inflatable packers are inflated or deflated by any available means and devices;
7- A method according to Claim 1-a that any kind of inflatable packers are used ;
8- A method according to Claim 1-a and 7 that any collapsible or removable packers, such as hydraulic packers, are used in place of inflatable packers;
9- A method according to Claim 1-d that any kind and/or numbers of water-pipes are used;
10- A method according to Claim 1-e that any other kind of devices integrated to the system to allow one-way passage of liquids/water from upper part of the casing to the lower pump section;
11- A method according to Claim 1 that a bottom-hole gas-separator is used to improve the performance of the method.
12- A method according to Claim 1 to 12 to be used for gas production from any gas reservoirs which produce excessive water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002568212A CA2568212A1 (en) | 2006-11-15 | 2006-11-15 | Reactivaiting gas wells |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002568212A CA2568212A1 (en) | 2006-11-15 | 2006-11-15 | Reactivaiting gas wells |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2568212A1 true CA2568212A1 (en) | 2008-05-15 |
Family
ID=39400533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002568212A Abandoned CA2568212A1 (en) | 2006-11-15 | 2006-11-15 | Reactivaiting gas wells |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2568212A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2683463C1 (en) * | 2018-06-28 | 2019-03-28 | федеральное государственное автономное образовательное учреждение высшего образования "Российский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина" | Method of lifting inhomogeneous multi-phase products from wells and device for its implementation |
-
2006
- 2006-11-15 CA CA002568212A patent/CA2568212A1/en not_active Abandoned
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2683463C1 (en) * | 2018-06-28 | 2019-03-28 | федеральное государственное автономное образовательное учреждение высшего образования "Российский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина" | Method of lifting inhomogeneous multi-phase products from wells and device for its implementation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU753037B2 (en) | Method and apparatus for increasing fluid recovery from a subterranean formation | |
| US11613972B2 (en) | System and method for low pressure gas lift artificial lift | |
| CA2376701C (en) | Gas recovery apparatus, method and cycle having a three chamber evacuation phase for improved natural gas production and down-hole liquid management | |
| US7363983B2 (en) | ESP/gas lift back-up | |
| MXPA05007415A (en) | Advanced gas injection method and apparatus liquid hydrocarbon recovery complex. | |
| EP3759313B1 (en) | Electrical submersible pump with gas venting system | |
| AU2010273768B2 (en) | System and method for intermittent gas lift | |
| US6131660A (en) | Dual injection and lifting system using rod pump and an electric submersible pump (ESP) | |
| RU2296213C2 (en) | Packer pumping plant for well formations operation | |
| CA2568212A1 (en) | Reactivaiting gas wells | |
| RU2132455C1 (en) | Method and pumping unit for injecting water into injection well | |
| CA2281083C (en) | Method and apparatus for down-hole oil/water separation during oil well pumping operations | |
| RU2768835C1 (en) | Method, device and system for extraction of residual oil contained in pores of oil reservoir using pressure varied with low frequency | |
| CN109915085B (en) | Gas-water balance-based natural gas hydrate exploitation method | |
| US1310615A (en) | Method of and system for pumping | |
| RU2491418C1 (en) | Method to develop multizone oil reservoir | |
| CN113638713B (en) | Float-type valve for electric pump well and electric pump production pipe column | |
| RU2211916C1 (en) | Method of well operation | |
| CA2485035C (en) | Gas recovery apparatus, method and cycle having a three chamber evacuation phase and two liquid extraction phases for improved natural gas production | |
| EA043017B1 (en) | SYSTEM FOR GAS-LIFT MECHANIZED OPERATION OF A LOW-PRESSURE WELL | |
| SU1350336A1 (en) | Apparatus for recovering hydrocarbons from flooding well | |
| MXPA00005042A (en) | Method and apparatus for increasing fluid recovery from a subterranean formation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |