CN111749661A - Injection-production conversion mining device and assembling method thereof - Google Patents
Injection-production conversion mining device and assembling method thereof Download PDFInfo
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- CN111749661A CN111749661A CN201910250822.8A CN201910250822A CN111749661A CN 111749661 A CN111749661 A CN 111749661A CN 201910250822 A CN201910250822 A CN 201910250822A CN 111749661 A CN111749661 A CN 111749661A
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- 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
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- 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
- E21B43/14—Obtaining from a multiple-zone well
Abstract
The application discloses an injection-production conversion exploitation device and an assembling method thereof, and belongs to the field of oil exploitation. The device comprises: the oil pump comprises a pump barrel, a pump bottom valve, a pump plunger and a discharge valve; the lower end of the oil pipe is connected with the upper end of the tail pipe, the pump barrel is fixed in the inner wall of the lower end of the oil pipe, the pump bottom valve is fixed at the bottom end of the pump barrel, the outer side surface of the pump plunger is in sealing contact with the inner side surface of the pump barrel, the pump plunger is provided with a discharge valve, one end of the sucker rod is connected with the upper end surface of the pump plunger, and the other end of the sucker rod is connected with the oil pumping unit; the N water distributors and the N packers are arranged on the tail pipe, each water distributor corresponds to one oil layer, and each water distributor is positioned on the tail pipe and opposite to the corresponding oil layer; the first packer is located above the first zone near the wellhead and the ith packer is located between the (i-1) th zone and the ith zone. This application can improve work efficiency.
Description
Technical Field
The application relates to the field of oil exploitation, in particular to an injection-production conversion exploitation device and an assembling method thereof.
Background
In the process of producing the oil layer through the oil production well, crude oil in the low-permeability oil layer is not easy to seep out, the production rate of the low-permeability oil layer is affected, and the yield of the low-permeability oil layer is reduced.
In order to inject water into the low-permeability oil layer, a water injection well is usually dug in the oil field, water is injected into the low-permeability oil layer through the water injection well, so that crude oil in the low-permeability oil layer is replaced, and the crude oil is extracted through the oil production well, so that the oil yield of the low-permeability oil layer is improved.
In the process of implementing the present application, the inventor finds that the prior art has at least the following problems:
the water injection well needs to be excavated in the water injection process, the working cost is high, the water injection well and the oil production well are frequently replaced to inject and produce oil layers, and the working efficiency is low.
Disclosure of Invention
In order to reduce the water injection cost and improve the working efficiency, the application provides an injection-production conversion mining device and an assembling method thereof. The technical scheme is as follows:
in a first aspect, the present application provides an injection-production conversion production apparatus for use in an oil well, comprising:
the oil well pump comprises a pump barrel, a pump bottom valve, a pump plunger and a discharge valve, wherein N is an integer greater than 0;
the lower end of the oil pipe is connected with the upper end of the tail pipe, the pump barrel is fixed in the inner wall of the lower end of the oil pipe, the pump bottom valve is fixed at the bottom end of the pump barrel, the outer side surface of the pump plunger is in sealing contact with the inner side surface of the pump barrel, the pump plunger moves up and down in the pump barrel and the oil pipe, the pump plunger is provided with a discharge valve, one end of the sucker rod is connected with the upper end surface of the pump plunger, and the other end of the sucker rod is connected with a pumping unit positioned at a well head;
the N water distributors and the N packers are arranged on the tail pipe, each water distributor corresponds to one oil layer, each water distributor is positioned on the tail pipe, and each water distributor is opposite to the corresponding oil layer;
each packer is located on the tail pipe, the first packer is located above the first oil layer near the wellhead, the ith packer is located between the (i-1) th oil layer and the ith oil layer, and i is 2, 3, … … and N.
Optionally, the ith packer is flush with or slightly higher than the ith oil layer in the oil well.
Optionally, the packers are provided with a channel in the longitudinal direction, and the sealing spaces between adjacent packers are communicated through the channel.
Optionally, the method further includes:
the control module is electrically connected with the packers and each water distributor through cables, and is used for controlling the jth packer and the jth +1 packer to set an oil sleeve annulus and controlling the jth water distributor to communicate the jth oil layer with the tail pipe, wherein j is 1, 2, … … and N-1; or the control module is used for controlling the setting of the oil sleeve annulus of the Nth packer and controlling the Nth water distributor to communicate the Nth oil layer with the tail pipe.
Optionally, the method further includes:
the wellhead device comprises a Christmas tree and a blowout preventer, the lower end of the Christmas tree is buried underground and connected with the upper end of the oil pipe, and the upper end of the Christmas tree is connected with the blowout preventer.
Optionally, the method further includes:
the centralizer, the centralizer is the annular, the inside wall of centralizer with the lateral wall contact of oil-well pump, the lateral wall of centralizer with the inside wall contact of oil pipe.
Optionally, the sucker rod passes through the tubing, a tree and a blowout preventer.
Optionally, the method further includes:
and the sieve tube is connected with the lower end of the tail tube and used for blocking the communication between the bottom of the tail tube and the sleeve 7.
In a second aspect, the present application provides an injection-production conversion mining assembly method, comprising:
connecting an oil pipe and a tail pipe in sequence from top to bottom, and fixing an oil well pump on the inner side wall of the lower end of the oil pipe, wherein the position of the oil well pump is determined according to the working fluid level depth and the submergence degree of a pump plunger, and the type and the size of the oil well pump are selected according to the target liquid production capacity of an oil well;
connecting one end of a sucker rod with the upper end face of the pump plunger, wherein the type of the sucker rod is determined according to the target liquid production amount of the oil well;
arranging N water distributors on the tail pipe, wherein each water distributor corresponds to one layer of oil, each water distributor is positioned on the tail pipe and is opposite to the corresponding oil layer, and the type of each water distributor is selected according to the target water injection amount;
setting N packers on the tail pipe, wherein the first packer is positioned above a first oil layer close to a wellhead, the ith packer is positioned between an i-1 th oil layer and an ith oil layer, i is 2, 3, … … and N, the model of the jth packer is selected according to the temperature and the oil layer pressure of the jth oil layer, and j is 1, 2, … … and N.
The technical scheme provided by the application has the beneficial effects that:
through this application, can carry out the work of water injection and oil recovery in an oil well, reduce the cost of excavating the water injection well, and water injection and oil recovery process can be changed rapidly, improves work efficiency.
Drawings
FIG. 1 is an injection-production conversion mining apparatus provided herein;
fig. 2 is an injection-production conversion mining method provided by the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
In the oil field production process, partial oil reservoir pressure is lower, lead to crude oil to ooze comparatively difficultly from the rock gap, influence the extraction rate of crude oil, consequently need to the oil reservoir water injection, make the crude oil in the low permeability oil reservoir replaced by water, staff excavates the water injection well on the oil field usually, through the water injection well to the water injection of hyposmosis oil reservoir, thereby solve the lower problem of crude oil extraction rate in hyposmosis oil reservoir, nevertheless the cost of excavating the water injection well is higher, and the process of exploiting hyposmosis oil reservoir usually need to use water injection well and oil production well many times to this oil reservoir water injection and oil recovery, work efficiency is lower.
Referring to fig. 1, the present application provides an injection-production conversion production apparatus applied in an oil well for reducing water injection cost and improving work efficiency, comprising:
the oil pump 2 comprises a pump barrel, a pump bottom valve, a pump plunger and a discharge valve, wherein N is an integer greater than 0;
the lower end of an oil pipe 1 is connected with the upper end of a tail pipe 3, a pump barrel is fixed in the inner wall of the lower end of the oil pipe 1, a pump bottom valve is fixed at the bottom end of the pump barrel, the outer side surface of a pump plunger is in sealing contact with the inner side surface of the pump barrel, the pump plunger moves up and down in the pump barrel and the oil pipe 1, the upper end surface of the pump plunger is provided with a discharge valve, one end of a sucker rod 4 is connected with the upper end surface of the pump plunger, and the other end of the sucker;
the N water distributors 5 and the N packers 6 are arranged on the tail pipe 3, each water distributor 5 corresponds to one oil layer, each water distributor 5 is positioned on the tail pipe 3, and each water distributor 5 is opposite to the corresponding oil layer;
each packer 6 is located on the liner 3, the first packer 6 is located above the first zone near the wellhead, the ith packer 6 is located between the (i-1) th and ith zones, i 2, 3, … …, N.
When the injection-production replacement-mining device is used for injecting water and extracting oil to a low-permeability oil layer, the device is put into an oil well, a pump bottom valve and a discharge valve of an oil well pump 2 are opened, water is injected into an oil pipe 1 from a well mouth, the water flows into a tail pipe 3 through the discharge valve and the pump bottom valve, and the water entering the tail pipe 3 is injected into the low-permeability oil layer through a water distributor 5; along with the continuous injection of water, crude oil in the low-permeability oil layer is replaced by water, the crude oil enters the tail pipe 3 through a channel on the sleeve 7 and then enters the oil pipe 1 through the pump bottom valve and the discharge valve, the discharge valve is closed at the moment, part of the crude oil is above the pump plunger and rises out of the oil pumping rod 4, the pump plunger is driven by the oil pumping rod 4 to move upwards, and the pump plunger lifts the crude oil above the pump plunger to a well head.
For each of the N water distributors 5, there is one oil layer for each water distributor 5, each water distributor 5 is located on the tail pipe 3 and each water distributor 5 is opposite to its corresponding oil layer.
Each packer 6 is located on the liner 3, the first packer 6 is located above the first zone near the wellhead, the ith packer 6 is located between the (i-1) th and ith zones, i 2, 3, … …, N.
Optionally, the water distributor 5 may use a bridge type concentric water distributor, the water distributor 5 uses an eccentric valve structure, the water distributor 5 is provided with an adjustable water nozzle, the rate of water injection from the water distributor 5 to the low permeability oil layer can be adjusted by adjusting the size of the water nozzle, and each water distributor 5 is opposite to the corresponding oil layer.
The ith packer 6 is flush or slightly higher than the ith layer in the oil well.
Optionally, the j th packer 6 and the j +1 th packer 6 set the annulus of the oil casing, that is, the j th packer 6 and the j +1 th packer 6 isolate the annulus of the tail pipe 3 and the casing 7 into a space, so that when the j th water distributor 5 injects water to the j th oil layer, water is between the j th packer 6 and the j +1 th packer 6, and water injection of different oil layers is not interfered with each other.
As for the above packer 6, optionally, the packer 6 is provided with a backwash well channel in the longitudinal direction, the spaces between the adjacent packers 6 are communicated through the channel, and the backwash well channel is used for injecting water into an annulus between the casing 7 and the tail pipe 3 through the backwash well channel when impurities such as gravel exist in the annulus, so that the impurities are discharged through the oil pipe 1.
Optionally, the packer 6 is a high-temperature-resistant and high-pressure-resistant removable step-by-step deblocking packer 6, which is adaptable to a high-temperature and high-pressure environment in an oil well and can be deblocked step by step.
A channel opposite to a jth oil layer is injected on a sleeve 7 in advance, when the device is put into an oil well, each water distributor 5 is opposite to one oil layer in the oil well, the size of a water nozzle of each water distributor 5 is adjusted according to different low-permeability oil layers, all the water distributors 5 are closed, N packers 6 are respectively pressurized and sealed, the packers 6 gradually expand until the inner side surfaces of the packers 6 are in sealing contact with the outer side wall of a tail pipe 3, the outer side surfaces of the packers 6 are in sealing contact with the inner side wall of the sleeve 7, the N packers 6 are sealed in an annular space between the tail pipe 3 and the sleeve 7, N spaces are formed between the tail pipe 3 and the sleeve 7 at the moment, a pump bottom valve and a discharge valve of an oil well pump 2 are opened, water is injected into the oil pipe 1 from a well mouth, the water enters the tail pipe 3 through the oil well pump 2, when the jth oil layer is required to be, water in the tail pipe 3 flows into a space between a jth packer 6 and a jth +1 packer 6 through a water nozzle of a jth water distributor 5, and then flows into a jth oil layer through a channel on the casing 7 opposite to the jth oil layer; at the moment, crude oil in the jth oil layer is replaced, the crude oil flows into a space between the jth packer 6 and the jth +1 packer 6 through a channel opposite to the jth oil layer on the sleeve 7 and then flows into the tail pipe 3, and the crude oil is lifted to a well head through the oil well pump 2.
Optionally, this embodiment further includes: the control module is electrically connected with the packers 6 and each water distributor 5 through cables 8 and is used for controlling the jth packer 6 and the jth +1 packer 6 to set an oil sleeve annulus and controlling the jth water distributor 5 to communicate the jth oil layer with the tail pipe 3, wherein j is 1, 2, … … or N-1; or the control module is used for controlling the Nth packer 6 to set the oil sleeve annulus and controlling the Nth water distributor 5 to communicate the Nth oil layer with the tail pipe 3.
The control module is used for adjusting the water injection amount of the water distributor 5, namely the opening size of the water nozzle, and when the water nozzle is completely closed, the water distributor 5 is closed.
Optionally, the control module adopts a steel pipe cable 8 for direct reading and adjustment, and determines the specific descending distance of the device in the oil well according to the underground depth detected by the control module; and adjusting the water injection rate of the ith water distributor 5 according to the detected magnitude of the ith reservoir pressure.
The temperature in the oil layer is higher, the pressure is also higher, and the service life of the cable 8 can be prolonged by selecting high-temperature-resistant and high-pressure-resistant materials.
After the device is put into the oil well, the control module detects the setting depth of the device and the pressure value under the corresponding depth, the data are transmitted to the ground through the cable, and the working personnel continue to adjust the setting depth of the device through the data until the ith water distributor 5 is opposite to the ith oil layer. The pressure of different oil layers detected by the control module is different, and after the pressure data is transmitted to the control module, the control module adjusts the water injection rate of the ith water distributor 5 according to the pressure of the ith oil layer.
Optionally, referring to fig. 1, this embodiment further includes: and the wellhead device 9 comprises a Christmas tree and a blowout preventer, the lower end of the Christmas tree is buried underground and connected with the upper end of the oil pipe 1, and the upper end of the Christmas tree is connected with the blowout preventer.
Predicting the maximum pressure borne by a wellhead in advance according to the oil layer pressure, the pressure in the production process and the maximum pressure in the water injection process, and selecting a Christmas tree and a blowout preventer with corresponding pressure levels according to the maximum pressure borne by the wellhead.
Optionally, a blowout preventer can be installed at the upper end of the christmas tree, the blowout preventer is used for preventing crude oil or water in the oil pipe 1 from being sprayed out, because the pressure in the oil pipe 1 is higher than the ground pressure, when the crude oil or water in the oil pipe 1 is pumped out through a wellhead, because the pressure of the crude oil or water is too high, the crude oil or water is not released timely, the crude oil or water may be sprayed out of the christmas tree, the blowout preventer is connected with the upper end of the christmas tree, and the blowout preventer can seal the upper end of the christmas tree to prevent the crude oil or water in the christmas tree from being.
Because the height of the Christmas tree for water injection is different from that of the Christmas tree for oil pumping, the device selects the higher Christmas tree, subtracts the height of the lower Christmas tree according to the height of the higher Christmas tree to obtain the difference value, namely the depth of the Christmas tree embedded into the ground, and embeds the bottom end of the Christmas tree into the ground, wherein the embedding depth is the difference value.
Well installation back with well head device 9, go into this device down, when to the oil reservoir water injection, through the production tree upper end to oil pipe 1 in water injection, water injects into the oil reservoir that corresponds through water injection mandrel 5, crude oil in the oil reservoir is lifted to the well head through oil-well pump 2 after being come out by the water replacement, crude oil pressure when taking out is too big, when crude oil is to the well head blowout, need close preventer, make the production tree well head seal, when the pressure of crude oil reduces gradually, when crude oil is no longer outwards blowout, open preventer, extract crude oil.
Optionally, referring to fig. 1, this embodiment further includes: the centralizer 10 can be cylindrical, the inner side wall of the centralizer 10 is in contact with the outer side wall of the water pump, the outer side wall of the centralizer 10 is in contact with the inner side wall of the oil pipe 1, the central line of the oil well pump 2 and the central line of the oil pipe 1 are the same, and the centralizer 10 can move up and down in the oil pipe 1 along with the oil well pump 2.
Because part of the oil wells are inclined wells and the inclination angle is larger, the oil extraction work can be normally carried out only by the axial directions of the casing 7 and the oil pipe 1 being parallel to the axial direction of the oil wells. When oil extraction begins, the oil well pump 2 moves downwards, the oil well pump 2 can move towards the vertical direction due to the influence of the gravity of the oil well pump 2, an inclination angle exists between the oil well and the ground, the oil well pump 2 can be abraded with the oil pipe 1 in the process of moving along the oil pipe 1, and the loss of the oil well pump 2 and the oil pipe 1 is large.
The method is characterized in that a proper centralizer 10 is selected in advance according to the inner diameter length of an oil pipe 1 and the diameter length of an oil well pump 2, the inner side wall of the centralizer 10 is in contact with the outer side wall of a water suction pump, the outer side wall of the centralizer 10 is in contact with the inner side wall of the oil pipe 1, when the oil well pump 2 moves up and down in the oil pipe 1, the centralizer 10 moves together with the oil well pump 2 to centralize the oil well pump 2, the central line of the oil well pump 2 and the central line of the oil pipe 1 are in the same line, and the oil well pump 2 cannot be abraded with the oil pipe 1 due to deviation of the moving path.
Optionally, the other end of the sucker rod 4 is connected with the oil pumping unit, and the sucker rod 4 penetrates through the oil pipe 1, the Christmas tree and the blowout preventer.
The sucker rod 4 is formed by combining a plurality of sections, the length of the sucker rod 4 is determined according to the pump hanging depth, and the model number of the sucker rod 4 is determined according to the target liquid production amount.
As shown in fig. 1, the present embodiment further includes: and the sieve tube 11 is connected with the lower end of the tail pipe 3 and is used for blocking the communication between the bottom of the tail pipe 3 and the casing 7.
In the water injection process, if the bottom end of the tail pipe 3 is not plugged, water injected from a wellhead directly flows into the bottom end of the casing pipe 7, and cannot be injected into an oil layer to be injected with water; in the oil extraction process, if the bottom end of the tail pipe 3 is not plugged, the crude oil extracted from the oil layer leaks out from the bottom of the tail pipe 3.
The bottom of the tail pipe 3 is sealed by using a sieve pipe 11, so that the bottom of the tail pipe 3 is separated from the casing 7, and crude oil or water in the tail pipe 3 is prevented from flowing from the bottom of the tail pipe 3 to the bottom of the casing 7.
The beneficial effect of this embodiment does: by the aid of the method, water injection and oil extraction can be performed in one oil well, the cost of excavating the water injection well is reduced, water injection and oil extraction processes can be rapidly converted, and working efficiency is improved; a bridge type concentric water distributor 5 is adopted to separately inject water into oil layers to be injected with water, and the water injection speed can be adjusted; and the same wellhead device 9 is adopted for water injection and oil extraction, so that the working efficiency is improved.
The embodiment of the application provides an injection-production conversion mining assembly method, which is shown in fig. 2 and comprises the following steps:
step 101: the oil pipe 1 and the tail pipe 3 are sequentially connected from top to bottom, the oil well pump 2 is fixed on the inner side wall of the lower end of the oil pipe 1, the position of the oil well pump 2 is determined according to the working fluid level depth and the submergence degree of a pump plunger, and the type and the size of the oil well pump 2 are selected according to the target liquid production amount of an oil well.
The depth of the working fluid level is the depth from the height of liquid in the casing 7 to the wellhead, and the target liquid production amount is the crude oil amount extracted from an oil layer preset by a worker according to the reserve capacity of the oil layer.
The working system of the oil well pump 2 is determined according to the target liquid production amount of the oil layer, and proper stroke and stroke frequency are selected, so that the working efficiency of the oil well pump 2 is improved.
Step 102: one end of the sucker rod 4 is connected with the upper end face of the pump plunger, and the type of the sucker rod 4 is determined according to the target liquid production amount of the oil well.
Step 103: n water distributors 5 are arranged on the tail pipe 3, each water distributor 5 corresponds to one layer of oil, each water distributor 5 is positioned on the tail pipe 3, each water distributor 5 is opposite to the corresponding oil layer, and the type of each water distributor 5 is selected according to the target water injection amount.
The ith water distributor 5 is opposite to the ith oil layer, each water distributor 5 in the N water distributors 5 corresponds to one oil layer, so the distance from the water distributor 5 to the wellhead needs to be determined according to the depth of the oil layer, the depth of the ith oil layer is the distance from the ith water distributor 5 to the wellhead, and i is 1, 2, … … or N.
Step 104: n packers 6 are arranged on a tail pipe 3, the first packer 6 is located above a first oil layer close to a wellhead, the ith packer 6 is located between an ith-1 oil layer and an ith oil layer, i is 2, 3, … … and N, the model of the jth packer 6 is selected according to the temperature and the oil layer pressure of the jth oil layer, and j is 1, 2, … … and N.
The temperature in the oil layer is higher, the pressure is also higher, and the service life of the packer 6 can be prolonged by selecting the materials with high temperature resistance and high pressure resistance.
Optionally, after setting the N packers 6 on the tail pipe 3, the following steps 105 to 106 are further included:
step 105: installing a wellhead device 9 at the wellhead, wherein the bottom end of the wellhead device 9 is connected with the oil pipe 1, the bottom end of the wellhead device 9 is buried underground, and the buried underground depth is related to the wellhead device 9 and a water injection Christmas tree and an oil pumping Christmas tree.
The wellhead device 9 comprises a Christmas tree and a blowout preventer, the height of the water-injected Christmas tree is different from that of the oil-pumped Christmas tree, the higher Christmas tree is selected as the Christmas tree of the embodiment, the lower end of the higher Christmas tree is buried underground and is connected with the oil pipe 1, and the buried depth of the higher Christmas tree is the difference value between the higher Christmas tree and the lower Christmas tree.
Step 106: and selecting a proper oil pumping unit, wherein the type of the oil pumping unit is related to the type of the oil pumping rod 4 and the target liquid production amount.
The beneficial effect of this embodiment does: by the aid of the method, water injection and oil extraction can be performed in one oil well, the cost of excavating the water injection well is reduced, water injection and oil extraction processes can be rapidly converted, and working efficiency is improved; according to self parameters such as oil reservoir pressure, oil reservoir depth and the like and prediction parameters such as target liquid production amount, a proper device is selected, so that the device is more suitable for various oil well conditions.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An injection-production conversion production device, which is applied to an oil well, comprising:
the oil well pump comprises a pump barrel, a pump bottom valve, a pump plunger and a discharge valve, wherein N is an integer greater than 0;
the lower end of the oil pipe is connected with the upper end of the tail pipe, the pump barrel is fixed in the inner wall of the lower end of the oil pipe, the pump bottom valve is fixed at the bottom end of the pump barrel, the outer side surface of the pump plunger is in sealing contact with the inner side surface of the pump barrel, the pump plunger moves up and down in the pump barrel and the oil pipe, the pump plunger is provided with a discharge valve, one end of the sucker rod is connected with the upper end surface of the pump plunger, and the other end of the sucker rod is connected with a pumping unit positioned at a well head;
the N water distributors and the N packers are arranged on the tail pipe, each water distributor corresponds to one oil layer, each water distributor is positioned on the tail pipe, and each water distributor is opposite to the corresponding oil layer;
each packer is located on the tail pipe, the first packer is located above the first oil layer near the wellhead, the ith packer is located between the (i-1) th oil layer and the ith oil layer, and i is 2, 3, … … and N.
2. The injection-production conversion production apparatus of claim 1 wherein the ith packer is at or slightly above the ith oil layer in the well.
3. The injection-production conversion production apparatus according to claim 2, wherein the packers are provided with passages in the longitudinal direction, and the sealed spaces between adjacent packers communicate through the passages.
4. The injection-production conversion mining apparatus of claim 1, further comprising:
the control module is electrically connected with the packers and each water distributor through cables, and is used for controlling the jth packer and the jth +1 packer to set an oil sleeve annulus and controlling the jth water distributor to communicate the jth oil layer with the tail pipe, wherein j is 1, 2, … … and N-1; or the control module is used for controlling the setting of the oil sleeve annulus of the Nth packer and controlling the Nth water distributor to communicate the Nth oil layer with the tail pipe.
5. The injection-production conversion mining apparatus of claim 1, further comprising:
the wellhead device comprises a Christmas tree and a blowout preventer, the lower end of the Christmas tree is buried underground and connected with the upper end of the oil pipe, and the upper end of the Christmas tree is connected with the blowout preventer.
6. The injection-production conversion mining apparatus of claim 1, further comprising:
the centralizer, the centralizer is the annular, the inside wall of centralizer with the lateral wall contact of oil-well pump, the lateral wall of centralizer with the inside wall contact of oil pipe.
7. The injection-production conversion production apparatus of claim 1, wherein the sucker rod passes through the tubing, a tree, and a blowout preventer.
8. The injection-production conversion mining apparatus of claim 1, further comprising:
and the screen pipe is connected with the lower end of the tail pipe and used for blocking the communication between the bottom of the tail pipe and the sleeve.
9. An injection-production conversion mining assembly method, the method comprising:
connecting an oil pipe and a tail pipe in sequence from top to bottom, and fixing an oil well pump on the inner side wall of the lower end of the oil pipe, wherein the position of the oil well pump is determined according to the working fluid level depth and the submergence degree of a pump plunger, and the type and the size of the oil well pump are selected according to the target liquid production capacity of an oil well;
connecting one end of a sucker rod with the upper end face of the pump plunger, wherein the type of the sucker rod is determined according to the target liquid production amount of the oil well;
arranging N water distributors on the tail pipe, wherein each water distributor corresponds to one layer of oil, each water distributor is positioned on the tail pipe and is opposite to the corresponding oil layer, and the type of each water distributor is selected according to the target water injection amount;
setting N packers on the tail pipe, wherein the first packer is positioned above a first oil layer close to a wellhead, the ith packer is positioned between an i-1 th oil layer and an ith oil layer, i is 2, 3, … … and N, the model of the jth packer is selected according to the temperature and the oil layer pressure of the jth oil layer, and j is 1, 2, … … and N.
10. The method of claim 9, wherein the ith packer is at or slightly above an ith oil layer in the well.
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| Publication number | Priority date | Publication date | Assignee | Title |
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