CN115992678A

CN115992678A - Oil-gas layered injection-production integrated process pipe column and injection-production method thereof

Info

Publication number: CN115992678A
Application number: CN202111219696.3A
Authority: CN
Inventors: 朱晓亮; 王智博; 李楠; 宋阳; 刘双亮; 贺梦琦; 董奇玮; 刘永为; 王丽莉; 栾睿智; 周贺; 徐雪楠; 吴振友
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2023-04-21

Abstract

The application discloses an oil and gas layered injection and production integrated process pipe column and an injection and production method thereof, wherein a first sealing packer and a second sealing packer are fixed on the inner side surface of a sleeve and seal the sleeve; closing the first through hole, carrying out primary exploitation of an oil layer, ejecting an oil body in the oil layer from a pipe column by utilizing energy of the oil body, after a certain amount of the oil body is ejected, lowering a blanking plug to a short-circuit-located position to seal the pipe column, simultaneously opening the first through hole, injecting natural gas into the pipe column, enabling the natural gas to enter a gas layer from the first through hole through a first gas injection port, storing the natural gas by the gas layer, and after the energy of the oil layer is stored to a certain extent, ejecting the oil body from the pipe column, and finally realizing exploitation of the oil body in the oil layer; and then the upper layer gas layer and the lower layer oil layer are injected with gas at the same time. Through the arrangement of the process pipe column, the period of storing the energy of the lower layer oil layer can be utilized to inject gas into the upper layer gas layer, so that the gas injection efficiency of the natural gas is effectively improved.

Description

Oil-gas layered injection-production integrated process pipe column and injection-production method thereof

Technical Field

The application belongs to the technical field of oil gas injection and production pipe columns, and particularly relates to an oil gas layered injection and production integrated pipe column and an injection and production method thereof.

Background

The gas storage is an artificial gas field or gas reservoir formed by re-injecting commercial natural gas into an underground space, is constructed by utilizing a depleted gas layer or oil layer, is the most commonly used and economical underground gas storage form, and has the characteristics of low cost and reliable operation.

However, in actual production, when the upper layer is the gas layer, and the lower layer is the underground space of the oil layer, there is a case that the lower layer oil layer is not exhausted yet, therefore, before natural gas is injected, the oil layer at the bottom layer needs to be mined, and after the exploitation of the oil layer at the bottom layer is completed, natural gas is injected into the oil layer to be stored, and because a great amount of time is required in the exploitation process of the oil layer, the injection efficiency of the natural gas is unavoidably affected.

Disclosure of Invention

The application aims at solving the technical problem that the gas injection efficiency is low when the existing pipe column is used for injecting gas into the underground space with the upper layer being a gas layer and the lower layer being an oil layer to a certain extent. Therefore, the application provides an oil and gas layered injection and production integrated process pipe column and an injection and production method thereof.

The embodiment of the application provides an oil gas layering is annotated and is adopted integrative technology tubular column, technology tubular column includes:

The surface of the sleeve is provided with a first gas injection port and a second gas injection port;

the pipe column is inserted and located inside the casing, the pipe column is provided with a first sealing packer, a second sealing packer and a short-circuit of sitting in sequence from top to bottom, the first sealing packer is located above the first gas injection port, the second sealing packer is located between the first gas injection port and the second gas injection port, the short-circuit of sitting is used for providing the blanking plug to install in the pipe column again, a first through hole is formed in the surface of the pipe column, and the first through hole is located between the first sealing packer and the second sealing packer.

In some embodiments, the first seal packer and the second seal packer each comprise:

the two ends of the fixed cylinder are fixed on the pipe column;

the rubber cylinder is sleeved on the surface of the fixed cylinder and is attached to the inner side surface of the sleeve;

the first extrusion cylinder is sleeved on the surface of the fixed cylinder and axially extrudes the rubber cylinder;

the first clamping cylinder is positioned on one side of the first extrusion cylinder, and the outer side face of the first clamping cylinder is clamped with the inner side face of the sleeve.

In some embodiments, the first and second seal packers further comprise hydraulic piston hydraulic pistons comprising:

the abutting piece is sleeved on the surface of the fixed cylinder and is positioned on one side of the first extrusion cylinder, a first expansion inclined plane is arranged at one end of the first extrusion cylinder, which is far away from the rubber cylinder, one end of the first clamping cylinder is positioned on the first expansion inclined plane, and the other end of the first clamping cylinder abuts against the abutting piece;

the first fixing piece is sleeved on the surface of the fixing cylinder and is fixed on one side, far away from the first clamping cylinder, of the first hydraulic port;

the first driving cylinder is sleeved on the surface of the fixed cylinder and is positioned at one side of the first hydraulic port, which is close to the first clamping cylinder;

the sealing piece is fixed on the outer side face of the first driving cylinder and extends towards the direction of the first fixing piece, and the inner side face of the sealing piece is in sealing fit with the sealing piece and the first fixing piece.

In some embodiments, the hydraulic piston further comprises:

The surface of the fixed cylinder is provided with a second hydraulic port, the second hydraulic port is positioned between the first hydraulic port and the abutting piece, the second driving cylinder is sleeved on the surface of the fixed cylinder and positioned on one side, close to the first clamping cylinder, of the second hydraulic port, and the second driving cylinder is fixedly connected with the first driving cylinder;

the second fixing piece is fixed on the surface of the fixing cylinder and is positioned on one side, far away from the first clamping cylinder, of the second hydraulic port, and the outer side face of the second fixing piece is in sealing fit with the inner side face of the first driving cylinder.

In some embodiments, the outer side surface of the fixed cylinder is provided with a ratchet, and the first extrusion cylinder and the abutting piece are clamped with the fixed cylinder through the ratchet.

In some embodiments, the first seal packer and the second seal packer further comprise:

the second extrusion cylinder is sleeved on the surface of the fixed cylinder and props against the other end of the rubber cylinder, and the second extrusion cylinder is sleeved on the surface of the fixed cylinder; a second expansion inclined plane is arranged at one end of the second extrusion cylinder, which is far away from the rubber cylinder;

The second clamping cylinder is characterized in that one end of the second clamping cylinder is positioned on the second expansion inclined plane, and the other end of the first clamping cylinder abuts against the surface of the fixed cylinder.

the two expansion spacer rings are sleeved on the surface of the fixed cylinder, one expansion spacer ring is positioned between the first extrusion cylinder and the rubber cylinder, and the other expansion spacer ring is positioned between the second extrusion cylinder and the rubber cylinder.

the lower end of the sealing short pipe is sleeved at the upper end of the fixed cylinder and is in threaded connection with the fixed cylinder;

and the lower end of the inserted sealing pipe is inserted into the sealing short pipe from the upper end of the sealing short pipe and is in threaded connection with the sealing short pipe.

In some embodiments, the tubing string further comprises a first circulation slip, the first circulation slip comprising:

the two ends of the outer sleeve are respectively fixed on the tubular column, a travel groove is formed in the outer sleeve, and the first through hole is formed in the surface of the outer sleeve and communicated with the travel groove;

The inner sliding cylinder is connected in the travel groove in a sliding manner and is in sealing fit with the inner wall of the travel groove, an air inlet through groove is formed in the surface of the inner sliding cylinder, and the air inlet through groove is communicated with the first through hole along with the sliding of the inner sliding cylinder.

In some embodiments, the tubular column further comprises a second circulation sliding sleeve with the same structure as the first circulation sliding sleeve, the second circulation sliding sleeve is fixed on one side, far away from the first circulation sliding sleeve, of the first sealing packer through the outer sleeve, and a second through hole is formed in the surface of the second circulation sliding sleeve.

In some embodiments, the second circulation sliding sleeve is mounted in a direction opposite to the first circulation sliding sleeve, and the air inlet through slot is offset from the center of the inner slide.

In some embodiments, the inner side surface of the inner slide is provided with a first hook groove and a second hook groove which is symmetrical to the first hook groove, the first hook groove and the second hook groove are respectively positioned at two sides of the air inlet through groove, the side walls of the first hook groove and the second hook groove, which are close to the end part of the inner slide, are perpendicular to the bottom wall of the first hook groove, and the other side walls of the first hook groove and the second hook groove are inclined towards the direction away from the end part of the inner slide.

In some embodiments, pressing inclined surfaces extending in a direction away from the travel groove are arranged on two side walls of the travel groove.

In some embodiments, an annular groove is provided on an inner wall of the travel groove, the annular groove is located on one side of the first through hole and is communicated with the first through hole, and the air inlet through groove is communicated with the annular groove along with sliding of the inner sliding barrel.

In some embodiments, a sealing ring is arranged between the outer sleeve and the inner sleeve, and the sealing ring is positioned at two sides of the annular groove.

In some embodiments, the outer side surface of the inner sliding cylinder is provided with a locking protrusion, the inner side surface of the outer sleeve is provided with a locking groove matched with the locking protrusion, and when the air inlet through groove is communicated with the first through hole, the locking protrusion is clamped in the locking groove.

The embodiment of the application has at least the following beneficial effects:

when the device works, firstly, the sleeve is put into an underground space to a certain depth, so that the first gas injection port is aligned with the gas layer at the upper part, the second gas injection port is aligned with the oil layer at the lower part, then the pipe column is inserted into the sleeve, the first sealing packer is positioned above the first gas injection port, the second sealing packer is positioned above the second gas injection port, and meanwhile, the first sealing packer and the second sealing packer are firmly fixed on the inner side surface of the sleeve by ball injection and liquid injection, and the sleeve is sealed; and after the protective liquid is injected between the casing above the first sealing packer and the tubular column, the first through hole is closed, primary exploitation of an oil layer is carried out, an oil body in the oil layer enters the casing from the second gas injection port and enters the tubular column from the lower port of the tubular column, the oil body is sprayed out of the tubular column by utilizing the energy of the oil body, and after the oil body is sprayed out of a certain amount, the oil body cannot be sprayed out of the tubular column due to the reduction of the energy of the oil body.

At the moment, the blanking plug is lowered to the short-circuit-located position to seal the pipe column, so that the oil body cannot pass through the blanking plug to store energy of an oil layer, the first through hole is opened while the energy is stored in the oil layer, natural gas is injected into the pipe column, the natural gas enters the gas layer from the first through hole through the first gas injection port, the gas layer stores the natural gas, and when the energy of the oil layer is stored to a certain degree, the first through hole is sealed, and the blanking plug is taken out to enable the oil body to be sprayed out of the pipe column; when the oil body cannot be sprayed out of the pipe column due to insufficient energy, the blanking plug is put down to the short-circuit-located position again, and the above actions are repeated until the energy of the oil layer is exhausted, so that the oil body cannot be sprayed out of the pipe column; repeating the above actions until the blanking plug is taken out for the last time, and finally realizing exploitation of the oil body in the oil layer when the oil body cannot be sprayed out from the pipe column; then the first through hole is opened, and gas is injected into the upper layer gas layer and the lower layer oil layer simultaneously. Through the arrangement of the process pipe column, the period of storing the energy of the lower layer oil layer can be utilized to inject gas into the upper layer gas layer, so that the time used in the gas injection process is effectively saved, and the gas injection efficiency of the natural gas is improved.

The embodiment of the application provides an injection and production method of an oil and gas layering injection and production integrated process pipe column, which comprises the following steps:

s100: lowering the process pipe column into the underground space to a certain depth, so that a first gas injection port is aligned with a gas layer at the upper part, and a second gas injection port is aligned with a lower oil layer;

s200: ball throwing and pressing are carried out in the tubular column so that the first sealing packer and the second sealing packer are firmly fixed on the inner side surface of the casing and the casing is sealed;

s300: the oil layer self energy is utilized to make the oil body be sprayed out from the pipe column until the oil layer energy is exhausted, and the oil body can not be sprayed out from the pipe column;

s400: the blanking plug is put into a short-circuit-located position, and the pipe column is sealed so as to store the energy of an oil layer;

s500: opening the first through hole, and injecting natural gas into the tubular column to enable the natural gas to enter the gas layer;

s600: after a period of time, closing the first through hole, taking out the blanking plug, and enabling the oil layer to utilize the stored energy to enable the oil body to be sprayed out of the pipe column until the energy of the oil layer is exhausted, wherein the oil body cannot be sprayed out of the pipe column;

s700: repeating the steps S400 to S600 several times; the oil body cannot be sprayed out from the pipe column until the blanking plug is taken out for the last time;

s800: and opening the first through hole, and injecting gas to the upper air layer and the lower oil layer simultaneously.

by the injection and production method of the process pipe column, the gas injection of the upper gas layer can be performed in the period of storing the energy of the lower oil layer, so that the time used in the gas injection process is effectively saved, and the gas injection efficiency of the natural gas is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a schematic structural diagram of an oil and gas layered injection and production integrated process pipe column in an embodiment of the present application;

FIG. 2 shows a schematic structural view of a first sealing packer or a second sealing packer of an oil and gas layered injection and production integrated process pipe column in an embodiment of the present application;

FIG. 3 shows a partial enlarged view at A in FIG. 2;

FIG. 4 shows a partial enlarged view at B in FIG. 2;

FIG. 5 shows a partial enlarged view at C in FIG. 2;

FIG. 6 shows a partial enlarged view at D in FIG. 2;

FIG. 7 shows a partial enlarged view at E in FIG. 2;

FIG. 8 shows a schematic structural view of a first circulation sleeve of an oil and gas layered injection and production integrated process pipe column in an embodiment of the present application;

FIG. 9 is a schematic view showing the structure of a driving tool inserted into a first circulation sliding sleeve according to an embodiment of the present application;

FIG. 10 shows a partial enlarged view at A in FIG. 9;

FIG. 11 shows a partial enlarged view at B in FIG. 9;

fig. 12 shows a flow chart of an injection and production method of an oil and gas stratified injection and production integrated process string in an embodiment of the present application.

Reference numerals:

10-sleeve 11-first gas injection port 12-second gas injection port

20-tubular column 21-first sealing packer 22-second sealing packer

23-short-circuit 24-first circulation sliding sleeve 25-second circulation sliding sleeve

26-soluble ball seat 27-ball 28-milling extension cylinder

211-fixed cylinder 212-rubber cylinder 213-first extrusion cylinder

214-first clamping cylinder 215-hydraulic piston 216-abutting piece

217 first fastener 218 first drive barrel 219 seal

221-second driving cylinder 222-second fixing member 223-second pressing cylinder

224-second clamping cylinder 225-expansion spacing ring 226-inserting sealing tube

227-sealing stub 241-first through hole 242-outer sleeve

243-inner slide 244-sealing ring 245-driving tool

2111-first hydraulic port 2112-second hydraulic port 2113-hydraulic chamber

2114-ratchet 2131-expansion ramp 2132-breakable pin

2421-travel groove 2422-annular groove 2423-locking groove

2424-pressing inclined surface 2431-air inlet through groove 2432-first hook groove

2433-second hook groove 2434-locking projection 2451-tool body

2452-elastic member 2453-adapter 2454-snap-fit projection

2455-unlocking ramp 2511-second through hole.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.

The present application is described below with reference to specific embodiments in conjunction with the accompanying drawings:

in one embodiment provided herein, as shown in fig. 1, there is provided an oil and gas stratified injection and production integrated process pipe string comprising:

the sleeve 10, the surface of sleeve 10 has first gas-injection port 11 and second gas-injection port 12;

the tubular column 20, tubular column 20 insert locate the inside of sleeve pipe 10, tubular column 20 from top to bottom is provided with first sealed packer 21, second sealed packer 22 in proper order and sits the short circuit 23, and first sealed packer 21 is located the top of first gas injection port 11, and second sealed packer 22 is located between first gas injection port 11 and the second gas injection port 12, sits the short circuit 23 and is used for supplying the blanking plug to install in tubular column 20 again, first through-hole 241 has been seted up to the surface of tubular column 20, first through-hole 241 is located between first sealed packer 21 and the second sealed packer 22.

Specifically, when the sleeve 10 is operated, the sleeve 10 is firstly lowered into an underground space to a certain depth, so that the first gas injection port 11 is aligned with a gas layer on the upper part, the second gas injection port 12 is aligned with a lower oil layer, then the pipe column 20 is inserted into the sleeve 10, the first sealing packer 21 is positioned above the first gas injection port 11, the second sealing packer 22 is positioned above the second gas injection port 12, the first through hole 241 is closed, then the interior of the pipe column 20 is subjected to ball injection and pressing, the lower opening of the pipe column 20 is sealed, then liquid is injected into the pipe column 20, the first sealing packer 21 and the second sealing packer 22 seal the clamping seat on the sleeve 10 under high-strength liquid pressure, after the first sealing packer 21 and the second sealing packer 22 seal the sleeve 10, the liquid is continuously injected into the pipe column 20 for pressurization, the ball injection is pumped, the liquid in the pipe column 20 flows out from the lower opening of the pipe column 20, and finally the fixation and sealing between the first sealing packer 21 and the second sealing packer 22 and the sleeve 10 are realized.

Then, a protection liquid is injected between the pipe column 20 and the casing 10, and a gap between the casing 10 and the pipe column 20 above the first sealing packer 21 is filled, so that a certain hydraulic pressure is given to the pipe column 20 through the first sealing packer 21, the pipe column 20 is protected in the oil layer exploitation process, meanwhile, due to the fact that the air pressure between the first sealing packer 21 and the second sealing packer 22 is large, part of gas overflows from the first sealing packer 21, and corrosion of the casing 10 and the pipe column 20 by the gas can be effectively prevented due to the arrangement of the protection liquid.

And then the oil layer is exploited once, the oil body in the oil layer enters the casing 10 from the second gas injection port 12 and enters the pipe column 20 from the lower port of the pipe column 20, and is ejected from the pipe column 20 by using the energy of the oil body.

At this time, the blanking plug is lowered to the position of the seating short circuit 23 to be installed so as to seal the pipe column 20, so that the oil body cannot pass through the blanking plug to store the energy of the oil layer, the first through hole 241 is opened while the oil layer stores the energy, natural gas is injected into the pipe column 20, the natural gas enters the gas layer from the first through hole 241 through the first gas injection port 11, the storage of the natural gas by the gas layer is realized, and after the energy of the oil layer is stored to a certain extent, the first through hole 241 is sealed, and the blanking plug is taken out so that the oil body is sprayed out from the pipe column 20; when the oil body cannot be sprayed out of the pipe column due to insufficient energy, the blanking plug is put down to the position of the sitting short circuit 23 again, and the actions are repeated, so that the energy of the oil layer is exhausted, and the oil body cannot be sprayed out of the pipe column; repeating the above actions until the blanking plug is taken out for the last time, the oil body cannot be ejected from the pipe column, finally the exploitation of the oil layer is realized, then the first through hole 241 is opened, and the upper layer gas layer and the lower layer oil layer are injected with gas simultaneously.

Through the arrangement of the process pipe column, the period of storing the energy of the lower layer oil layer can be utilized to inject gas into the upper layer gas layer, so that the time used in the gas injection process is effectively saved, and the gas injection efficiency of natural gas is improved.

In this example, further, as shown in fig. 1, the end of the pipe string 20 near the second gas injection port 12 is provided with a soluble ball seat 26. When the ball is thrown and pressed, the ball 27 falls into the soluble ball seat 26 to block the lower end of the pipe column 20, and after the protective liquid is filled for a period of time, the protective liquid is pressed, so that the ball falls from the lower opening of the pipe column 20.

In another embodiment provided herein, as shown in fig. 2 and 4-5, the first seal packer 21 and the second seal packer 22 each comprise:

a fixing cylinder 211, both ends of the fixing cylinder 211 being fixed to the pipe string 20;

the rubber cylinder 212 is sleeved on the surface of the fixed cylinder 211 and is attached to the inner side surface of the sleeve 10;

the first extrusion cylinder 213 is sleeved on the surface of the fixed cylinder 211 and abuts against one end of the rubber cylinder 212;

the first clamping cylinder 214, the first clamping cylinder 214 is located at one side of the first extrusion cylinder 213 and is abutted against the end part of the hydraulic piston 215, and the outer side surface of the first clamping cylinder 214 is clamped with the inner side surface of the sleeve 10.

Specifically, the first sealing packer 21 and the second sealing packer 22 are fixed on the pipe column 20 through the fixing cylinder 211, the rubber cylinder 212 is sleeved on the surface of the fixing cylinder 211, the outer diameter of the rubber cylinder 212 is increased under the axial extrusion of the first extrusion cylinder 213, and finally, the rubber cylinder 212 is attached to the inner side surface of the casing 10, so that the sealing connection between the first sealing packer 21 and the second sealing packer 22 and the casing 10 is realized, the first clamping cylinder 214 is clamped with the inner side surface of the casing 10, and the first sealing packer 21 and the second sealing packer 22 are fixed on the inner side surface of the casing 10, so that the pipe column 20 is fixed inside the casing 10.

In another embodiment provided herein, as shown in fig. 2 and 5-7, the first seal packer 21 and the second seal packer 22 each include a hydraulic piston 215, the hydraulic piston 215 including:

the abutting piece 216 is sleeved on the surface of the fixed cylinder 211 and is positioned on one side of the first extrusion cylinder 213, one end of the first extrusion cylinder 213, which is far away from the rubber cylinder 212, is provided with a first expansion inclined plane 2131, one end of the first clamping cylinder 214 is positioned on the first expansion inclined plane 2131, and the other end of the first clamping cylinder 214 abuts against the abutting piece 216;

the first fixing piece 217 is provided with a first hydraulic port 2111 on the surface of the fixing cylinder 211, and the first fixing piece 217 is sleeved on the surface of the fixing cylinder 211 and is fixed on one side of the first hydraulic port 2111 away from the first clamping cylinder 214;

The first driving cylinder 218, the first driving cylinder 218 is sleeved on the surface of the fixed cylinder 211 and is positioned at one side of the first hydraulic port 2111 close to the first clamping cylinder 214;

and a seal 219, wherein the seal 219 is fixed to the outer side surface of the drive cylinder and extends in the direction of the first fixing member 217, and the inner side surface of the seal 219 is in sealing contact with the seal 219 and the first fixing member 217.

Specifically, when the pipe string 20 is just inserted into the casing 10, the rubber cylinder 212 and the first clamping cylinder 214 are in an untouched state with the inner side surface of the casing 10, after the lower end of the pipe string 20 is sealed by initial ball throwing, liquid is introduced into the pipe string 20, the liquid gradually rises in the pipe string 20 and enters the first hydraulic opening 2111, because the first sealing element 219 is located at one side of the first hydraulic opening 2111 away from the first clamping cylinder 214, the first driving cylinder 218 is located at one side of the first hydraulic opening 2111 near the first clamping cylinder 214, the first sealing element 219 and the first driving cylinder 218 are separated at two sides of the first hydraulic opening 2111, and the inner side surface of the sealing element 219 is in sealing fit with the sealing element 219 and the first fixing element 217, so that the sealing element 219, the first fixing element 217 and the first driving cylinder 218 are enclosed to form a hydraulic cavity 2113, and the liquid enters the hydraulic cavity 2113 from the first hydraulic opening 2111.

Because the first fixing element 217 is fixed on the surface of the fixing cylinder 211, as the hydraulic pressure in the hydraulic chamber 2113 increases, a driving force acting on the first driving cylinder 218 is generated, the first driving cylinder 218 is pushed to move towards the abutting element 216 to drive the abutting element 216 to move, and the clamping cylinder is pushed to squeeze the rubber cylinder 212 when moving, so that the rubber cylinder 212 is finally attached to the inner side surface of the casing 10, and the sealing of the casing 10 by the first sealing packer 21 and the second sealing packer 22 is realized. After the glue tube 212 is attached to the inner side surface of the sleeve 10, the first extrusion tube 213 stops moving, and the abutting piece 216 drives the first clamping tube 214 to move toward the first expansion slope 2131, so that the port of the first clamping tube 214 expands, and finally the clamping between the first clamping tube 214 and the inner side surface of the sleeve 10 is realized.

With the arrangement, the packing and the clamping seat between the first sealing packer 21 and the second sealing packer 22 and the casing 10 can be realized only by introducing liquid into the pipe column 20 after ball injection and pressing.

In another embodiment provided herein, as shown in fig. 2 and 5-6, the hydraulic piston 215 further includes:

the second driving cylinder 221, the surface of the fixed cylinder 211 is provided with a second hydraulic port 2112, the second hydraulic port 2112 is positioned between the first hydraulic port 2111 and the abutting piece 216, the second driving cylinder 221 is sleeved on the surface of the fixed cylinder 211 and positioned at one side of the second hydraulic port 2112 close to the first clamping cylinder 214, and the second driving cylinder 221 is fixedly connected with the first driving cylinder 218;

The second fixing piece 222, the second fixing piece 222 is fixed on the surface of the fixing cylinder 211 and is located at one side of the second hydraulic port 2112 away from the first clamping cylinder 214, and the outer side surface of the second fixing piece 222 is in sealing fit with the inner side surface of the first driving cylinder 218.

Specifically, since the second driving cylinder 221 is sleeved on one side of the second hydraulic port 2112 close to the first clamping cylinder 214, the second fixing piece 222 is fixed on one side of the second hydraulic port 2112 far from the first clamping cylinder 214, so that the second driving cylinder 221 and the second fixing piece 222 are separated on two sides of the second hydraulic port 2112, and the outer side surface of the second fixing piece 222 is in sealing fit with the inner side surface of the first driving cylinder 218, so that a hydraulic cavity 2113 is formed by surrounding the second fixing piece 222, the second driving cylinder 221 and the first driving cylinder 218, liquid enters the hydraulic cavity 2113 from the second hydraulic port 2112, and since the second fixing piece 222 is fixed on the surface of the fixing cylinder 211, as the hydraulic pressure in the hydraulic cavity 2113 increases, a driving force acting on the second driving cylinder 221 in the direction of the abutting piece 216 is generated, and the driving force acting on the abutting piece 216 together with the acting on the first driving cylinder 218, so that the sealing and clamping seats between the first sealing packer 21 and the second sealing packer 22 and the casing 10 are convenient.

In another embodiment provided herein, as shown in fig. 2 and 5, the outer side surface of the fixing cylinder 211 is provided with ratchet teeth 2114, and the first pressing cylinder 213 and the abutment 216 are both engaged with the fixing cylinder 211 through the ratchet teeth 2114.

Specifically, due to the irreversibility of the ratchet teeth 2114, the first squeeze tube 213 and the abutment 216 will not retract after moving along the surface of the fixed tube 211, so that self-locking can be achieved after packing and clamping between the first seal packer 21 and the second seal packer 22 and the casing 10, and stability of the first seal packer 21 and the second seal packer 22 is ensured.

In another embodiment provided herein, as shown in fig. 2-3, the first seal packer 21 and the second seal packer 22 further comprise:

the second extrusion cylinder 223, the second extrusion cylinder 223 is sleeved on the surface of the fixed cylinder 211 and props against the other end of the rubber cylinder 212, and the second extrusion cylinder 223; the end of the second extrusion barrel 223 away from the rubber barrel 212 is provided with a second expansion inclined plane 2131;

and a second locking cylinder 224, wherein one end of the first locking cylinder 214 is located on the expansion slope 2131, and the other end of the first locking cylinder 214 abuts against the surface of the fixed cylinder 211.

Specifically, before the liquid is not injected, the abutting piece 216, the first extrusion barrel 213 and the second extrusion barrel 223 are fixed on the surface of the fixed barrel 211 through the breakable pin 2132, through the arrangement, the breakable pin 2132 is cut off after the glue barrel 212 receives the larger extrusion force of the first extrusion barrel 213, the glue barrel 212 is driven to move towards the second extrusion barrel 223, and the second extrusion barrel 223 is driven to move and cut off the breakable pin 2132, so that the end part of the second clamping barrel 224 expands along the second expansion inclined plane 2131, finally is clamped on the inner side surface of the casing 10, and cooperates with the first clamping barrel 214 to realize the clamping seats of the first sealing packer 21 and the second sealing packer 22, so that stability is provided for clamping connection between the pipe column 20 and the casing 10, pressure bearing and temperature resistance of the first sealing packer 21 and the second sealing packer 22 are improved, meanwhile, through stable connection of the pipe column 20 and the casing 10, the inner diameter of the pipe column 20 can be properly enlarged, and convenience is provided for subsequent reconstruction operation.

In another embodiment provided herein, as shown in fig. 2 and 4, the first sealing packer 21 and the second sealing packer 22 further comprise:

two expansion spacer rings 225, two expansion spacer rings 225 are all sleeved on the surface of the fixed cylinder 211, one expansion spacer ring 225 is located between the first extrusion cylinder 213 and the rubber cylinder 212, and the other expansion spacer ring 225 is located between the second extrusion cylinder 223 and the rubber cylinder 212.

Specifically, the two expansion spacers 225 can prevent the single side of the rubber tube 212 from being deformed, and improve the sealing effect and the sealing stability between the rubber tube 212 and the sleeve 10.

In another embodiment provided herein, as shown in fig. 1-2, the first seal packer 21 and the second seal packer 22 further comprise:

the lower end of the sealing short pipe 227 is sleeved at the upper end of the fixed cylinder 211 and is in threaded connection with the fixed cylinder 211;

the seal pipe 226 is inserted, and the lower end of the seal pipe 226 is inserted from the upper end of the seal stub 227 into the inside of the seal stub 227 and is screwed with the seal stub 227.

Specifically, the sealing performance between the first sealing packer 21 and the second sealing packer 22 and the pipe column 20 can be improved by inserting the sealing cylinder, the screwing-in directions of the sealing short pipe 227 and the inserting sealing pipe 226 are opposite, through the arrangement, the sealing short pipe 227 of the first sealing packer 21 can be unscrewed only by rotating the pipe column 20, the upper end of the pipe column 20 is taken down from the first sealing packer 21, and then the outer side surfaces of the first clamping cylinder 214 and the second clamping cylinder 224 of the first sealing packer 21 can be milled after the pipe column 20 is put into a milling tool, so that the first clamping cylinder 214 and the second clamping cylinder 224 are in clamping connection with the inner wall of the casing 10.

In this example, further, as shown in fig. 1, the ends of the first seal packer 21 and the second seal packer 22, which are away from the seal stub 227, are provided with a mill extension cylinder 28; after the first and second clamping drums 214, 224 are milled, a fishing tool may be lowered to remove the first seal packer 21. After the first sealing packer 21 is taken out, the pipe column 20 is continuously rotated to unscrew the sealing short pipe 227 of the second sealing packer 22, the milling tool is lowered again, the outer side surfaces of the first clamping cylinder 214 and the second clamping cylinder 224 of the second sealing packer 22 are milled, the first clamping cylinder 214 and the second clamping cylinder 224 are separated from the inner wall of the casing 10, the pipe column 20 is taken out through the milling extension cylinder 28 of the second sealing packer 22 by lowering the fishing tool. With the above arrangement, convenience can be provided for unclamping and salvaging the pipe column 20.

In another embodiment provided herein, as shown in fig. 1 and 8-11, the tubular string 20 further includes a first circulation slip 24, the first circulation slip 24 comprising:

the outer sleeve 242, both ends of the outer sleeve 242 are fixed on the pipe column 20 respectively, a travel groove 2421 is arranged in the outer sleeve 242, and the first through hole 241 is arranged on the surface of the outer sleeve 242 and communicated with the travel groove 2421;

The inner sliding cylinder 243, the inner sliding cylinder 243 is slidably connected in the travel groove 2421 and is in sealing fit with the inner wall of the travel groove 2421, the surface of the inner sliding cylinder 243 is provided with an air inlet through groove 2431, and the air inlet through groove 2431 is communicated with the first through hole 241 along with the sliding of the inner sliding cylinder 243.

Specifically, by driving the tool 245, the inner cylinder 243 can be driven to slide along the surface of the travel groove 2421, when the air inlet through groove 2431 is not communicated with the first through hole 241, the side wall of the inner cylinder 243 will block the first through hole 241 to close the hole, when the air inlet through groove 2431 is communicated with the first through hole 241, the first through hole 241 is communicated with the inner part of the inner cylinder 243, and the first through hole 241 is in an open state. Through the arrangement of the structure, the first through hole 241 can be opened and closed by the driving tool 245 corresponding to the first circulating sliding sleeve 24, and convenience is provided for the injection and production work of the process pipe column.

In another embodiment provided in the present application, as shown in fig. 1, the tubular string 20 further includes a second circulation sliding sleeve 25 having the same structure as the first circulation sliding sleeve 24, the second circulation sliding sleeve 25 is fixed on a side of the first sealing packer 21 away from the first circulation sliding sleeve 24 through an outer sleeve 242, and a second through hole 2511 is provided on a surface of the second circulation sliding sleeve 25.

Specifically, after ball throwing and pressing, the second through hole 2511 of the second circulation sliding sleeve 25 is opened by the driving tool 245, and a protective liquid is injected into the casing 10, when the protective liquid rises to a certain height, the protective liquid flows into the pipe column 20 from the second through hole 2511, finally the casing 10 positioned above the first sealing packer 21 is filled, and when the protective liquid is filled into the pipe column 20, a small amount of bubbles are formed in the pipe column 20 to influence the ball throwing and pressing of the pipe column 20, so that the bubbles in the pipe column 20 are required to be timely discharged before the ball throwing and pressing, and the bubbles in the pipe column 20 can be directly discharged through the second through hole 2511 through the arrangement of the second through hole 2511 without being discharged from the upper opening of the pipe column 20, and the discharging efficiency of the bubbles is effectively improved; during oil extraction, the protection liquid above the first sealing packer 21 provides a certain hydraulic pressure for the pipe column 20, and balances the driving force of the oil body acting on the pipe column 20 during oil extraction, so that the pipe column 20 is stable, meanwhile, the second circulating sliding sleeve 25 can provide a certain help for the gas extraction above the first sealing packer 21, in addition, when the first through hole 241 of the first circulating sliding sleeve 24 is closed, the second through hole 2511 of the second circulating sliding sleeve 25 is opened, so that the protection liquid flows into the pipe column from the second through hole 2511, and therefore, the second through hole 2511 needs to be closed again, and the protection liquid is replenished.

In another embodiment provided herein, the second circulation sliding sleeve 25 is installed in the opposite direction to the first circulation sliding sleeve 24, and the air inlet through slot 2431 is offset from the center of the inner cylinder 243.

Specifically, with this arrangement, with the driving tool 245 being lowered, the first through hole 241 can be opened while the second through hole 2511 is closed, or the first through hole 241 can be closed while the second through hole 2511 is opened, thereby providing convenience for the injection and production operation of the process pipe string.

In another embodiment provided by the application, as shown in fig. 8-11, the inner side surface of the inner slide 243 is provided with a first hook groove 2432 and a second hook groove 2433 symmetrically arranged with the first hook groove 2432, the first hook groove 2432 and the second hook groove 2433 are respectively positioned at two sides of the air inlet through groove 2431, the side walls of the end parts of the first hook groove 2432 and the second hook groove 2433, which are close to the inner slide 243, are respectively arranged perpendicular to the bottom wall of the first hook groove 2432, and the other side walls of the first hook groove 2432 and the second hook groove 2433 are obliquely arranged towards the direction away from the end part of the inner slide 243.

Specifically, as shown in fig. 9 and 11, the driving tool 245 for driving the inner slide 243 includes a tool body 2451, an elastic member 2452 and an adapting cylinder 2453, the adapting cylinder 2453 is sleeved on the surface of the tool body 2451, the elastic member 2452 is located between the adapting cylinder 2453 and the tool body 2451 and is elastically connected with the adapting cylinder 2453, a clamping protrusion 2454 adapted to the first hook groove 2432 and the second hook groove 2433 is provided on an outer side surface of the adapting cylinder 2453, one side wall of the clamping protrusion 2454 is perpendicular to the surface of the adapting cylinder 2453, and the other side wall of the clamping protrusion 2454 is inclined to the surface of the adapting cylinder 2453.

In this embodiment, further, the first hook groove 2432 of the first circulation sliding sleeve 24 is located above the second hook groove 2433, and the first hook groove 2432 of the second circulation sliding sleeve 25 is located below the second hook groove 2433. Through the arrangement, when the driving tool 245 is put into one side of the first hook groove 2432 of the second circulation sliding sleeve 25, the clamping protrusion 2454 enters the first hook groove 2432 under the action of the elastic piece 2452, so that the side wall of the vertical adapting cylinder 2453 of the clamping protrusion 2454 is propped against the side wall of the vertical second hook groove 2433 on the second hook groove 2433, the inner sliding sleeve is driven to slide along the travel groove 2421, the air inlet through groove 2431 is aligned with the second through hole 2511, and the opening of the second through hole 2511 is realized; when the driving tool 245 continues to be lowered to make the clamping protrusion 2454 be lowered to one side of the second hook groove 2433 of the first circulation sliding sleeve 24, the inner sliding sleeve 243 is driven to move according to the same manner, so as to close the first through hole 241.

If the direction of the driving tool 245 is changed, when the engaging protrusion 2454 enters the first hook groove 2432 of the first circulation sliding sleeve 24 and the second hook groove 2433 of the second circulation sliding sleeve 25 under the action of the elastic member 2452, the driving tool 245 is pulled up, and the driving tool 245 drives the inner sliding cylinder 243 to move in the same manner, so that the first through hole 241 on the first circulation sliding sleeve 24 is opened and the second through hole 2511 on the second circulation sliding sleeve 25 is closed.

The other side walls of the first and

second hook grooves

2432 and 2433 are inclined in a direction away from the end of the inner slide 243 to facilitate the sliding out of the snap projections 2454 from the first and

second hook grooves

2432 and 2433.

In addition to the present embodiment, the first hook 2432 of the first circulation slide 24 is located below the second hook 2433, and the first hook 2432 of the second circulation slide 25 is located above the second hook 2433.

In another embodiment provided in the present application, as shown in fig. 8 and 11, pressing slopes 2524 extending in a direction away from the travel groove 2421 are provided on both sidewalls of the travel groove 2421.

Specifically, the end of the adapter cylinder 2453 is provided with an unlocking bevel 2455, when the driving tool 245 enters the first hook groove 2432 or the second hook groove 2433, the unlocking bevel 2455 and the pressing bevel 2524 are propped against each other, so that when the driving tool 245 is continuously pulled up or pulled down, the driving tool 245 slides out of the first hook groove 2432 or the second hook groove 2433 under the action of the unlocking bevel 2455 and the pressing bevel 2524, and convenience is provided for pulling up and pulling down the driving tool 245.

In another embodiment provided in the present application, as shown in fig. 8-10, the inner wall of the travel groove 2421 is provided with an annular groove 2422, the annular groove 2422 is located at one side of the first through hole 241 and communicates with the first through hole 241, and the intake through groove 2431 communicates with the annular groove 2422 along with the sliding of the inner slide 243.

Specifically, the annular groove 2422 is an intermediate passage that communicates the first through hole 241 and the intake air passage groove 2431, so that the intake air passage groove 2431 can realize communication with the first through hole 241 without aligning the first through hole 241.

In another embodiment provided herein, as shown in fig. 8-10, a sealing ring 244 is disposed between the outer sleeve 242 and the inner barrel 243, the sealing ring 244 being located on either side of the annular groove 2422.

Specifically, the sealing ring 244 can seal the outer sleeve 242 and the inner sleeve 243, prevent gas from leaking between the outer sleeve 242 and the inner sleeve 243, and improve the steam injection efficiency of the tubular string 20.

In another embodiment provided in the present application, as shown in fig. 8-9 and 11, the outer side surface of the inner cylinder 243 is provided with a locking protrusion 2434, the inner side surface of the outer sleeve 242 is provided with a locking groove 2423 adapted to the locking protrusion 2434, and when the air inlet through groove 2431 is in communication with the first through hole 241, the locking protrusion 2434 is clamped in the locking groove 2423.

Specifically, the engagement of the locking groove 2423 and the locking projection 2434 prevents the inner slide 243 from sliding within the travel groove 2421.

In one embodiment provided herein, as shown in fig. 12, there is provided an injection and production method of an oil and gas stratified injection and production integrated process pipe string, comprising the steps of:

S100: lowering the process pipe column into the underground space to a certain depth so that the first gas injection port 11 is aligned with the upper gas layer, and the second gas injection port 12 is aligned with the lower oil layer;

s200: ball-casting and pressing are carried out in the pipe column 20 so as to ensure that the first sealing packer 21 and the second sealing packer 22 are firmly fixed on the inner side surface of the casing 10 and seal the casing 10;

s300: the oil body is sprayed out of the pipe column 20 by utilizing the energy of the oil layer until the energy of the oil layer is exhausted, and the oil body cannot be sprayed out of the pipe column 20;

s400: the blanking plug is lowered to the position of the sitting short circuit 23, and the pipe column 20 is sealed so as to store energy of an oil layer;

s500: opening the first through hole 241, injecting natural gas into the pipe column 20, and allowing the natural gas to enter the gas layer;

s600: after a period of time, the first through hole 241 is closed, the plug is taken out, and the oil layer is sprayed out of the pipe column 20 by using the stored energy;

s700: the first through hole 241 is opened, and gas is simultaneously injected into the upper gas layer and the lower oil layer.

by the injection and production method of the process pipe column, the gas injection of the upper gas layer can be performed in the period of storing the energy of the lower oil layer, so that the time used in the gas injection process is effectively saved, and the gas injection efficiency of natural gas is effectively improved.

In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate or positional relationships are based on the positional relationships shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

It should be noted that all the directional indicators in the embodiments of the present application are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture, and if the specific posture is changed, the directional indicators are correspondingly changed.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An oil and gas layering injection and production integrated process pipe column, which is characterized by comprising:

2. The hydrocarbon stratified injection and production integrated tubular string of claim 1, wherein the first sealing packer and the second sealing packer each comprise:

the two ends of the fixed cylinder are fixed on the pipe column;

3. The hydrocarbon stratified injection and production integrated tubular string of claim 2, wherein the first sealing packer and the second sealing packer further comprise hydraulic pistons comprising:

4. The hydrocarbon stratified injection and production integrated tubular string of claim 3, wherein the hydraulic piston further comprises:

5. The hydrocarbon stratified injection and production integrated process pipe column of claim 3, wherein the outer side surface of the fixed cylinder is provided with ratchets, and the first extrusion cylinder and the abutting piece are clamped with the fixed cylinder through the ratchets.

6. The hydrocarbon stratified injection and production integrated tubular string of claim 3, wherein the first sealing packer and the second sealing packer further comprise:

7. The hydrocarbon stratified injection and production integrated tubular string of claim 6, wherein the first sealing packer and the second sealing packer further comprise:

8. The hydrocarbon stratified injection and production integrated tubular string of claim 2, wherein the first sealing packer and the second sealing packer further comprise:

9. The hydrocarbon zonal injection and production integrated tubular string of any of claims 1-8, wherein the tubular string further comprises a first circulation sleeve comprising:

10. The hydrocarbon stratified injection and production integrated tubular column of claim 9, further comprising a second circulation sleeve having the same structure as the first circulation sleeve, wherein the second circulation sleeve is fixed to a side of the first sealing packer, which is far away from the first circulation sleeve, through the outer sleeve, and a second through hole is provided on a surface of the second circulation sleeve.

11. The hydrocarbon stratified injection and production integrated tubular string of claim 10, wherein the second circulation sleeve is mounted in a direction opposite to the first circulation sleeve, and the intake channel is offset from the center of the inner sleeve.

12. The hydrocarbon layering injection and production integrated process pipe column according to claim 9, wherein a first hook groove and a second hook groove which are symmetrically arranged with the first hook groove are arranged on the inner side surface of the inner slide, the first hook groove and the second hook groove are respectively positioned on two sides of the air inlet through groove, side walls of the first hook groove and the second hook groove, which are close to the end part of the inner slide, are perpendicular to the bottom wall of the first hook groove, and the other side walls of the first hook groove and the second hook groove are obliquely arranged towards the direction away from the end part of the inner slide.

13. The hydrocarbon stratified injection and production integrated tubular column as claimed in claim 9, wherein pressing slopes 2524 extending in a direction away from the travel slot are provided on both side walls of the travel slot.

14. The hydrocarbon stratified injection and production integrated process pipe column according to claim 9, wherein an annular groove is formed in the inner wall of the travel groove, the annular groove is located on one side of the first through hole and is communicated with the first through hole, and the air inlet through groove is communicated with the annular groove along with sliding of the inner sliding barrel.

15. The hydrocarbon stratified injection and production integrated tubular column of claim 9, wherein a sealing ring is arranged between the outer sleeve and the inner sleeve, and the sealing ring is positioned at two sides of the annular groove.

16. The hydrocarbon stratified injection-production integrated tubular column according to claim 9, wherein a locking protrusion is arranged on the outer side surface of the inner sleeve, a locking groove adapted to the locking protrusion is arranged on the inner side surface of the outer sleeve, and the locking protrusion is clamped in the locking groove when the air inlet through groove is communicated with the first through hole.

17. An injection and production method of an oil-gas layering injection and production integrated process pipe column is characterized by comprising the following steps of:

s200: ball throwing and pressing are carried out in the tubular column so that the first sealing packer and the second sealing packer are firmly fixed on the inner side surface of the sleeve and the sleeve is sealed;

s700: repeating steps S400 to S600 several times; the oil body cannot be sprayed out from the pipe column until the blanking plug is taken out for the last time;