CN111677488A - Ball throwing and selecting injection pipe column and ball throwing device - Google Patents
Ball throwing and selecting injection pipe column and ball throwing device Download PDFInfo
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- CN111677488A CN111677488A CN202010455562.0A CN202010455562A CN111677488A CN 111677488 A CN111677488 A CN 111677488A CN 202010455562 A CN202010455562 A CN 202010455562A CN 111677488 A CN111677488 A CN 111677488A
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- ball
- central sleeve
- fusible
- baffle
- outer cylinder
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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
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/1208—Packers; Plugs characterised by the construction of the sealing or packing means
Abstract
The invention relates to a ball-throwing selecting injection pipe column and a ball-throwing device, comprising: the central sleeve is used for being connected with the adjacent pipe sections in the pipe column, and steam passes through the central sleeve; the outer cylinder is sleeved outside the central sleeve, a ball storage space is formed between the outer cylinder and the central sleeve in a surrounding mode, and the ball storage space is used for storing the plugging balls; the side wall of the central tube is provided with an overflowing hole, and steam enters the ball storage space from the central sleeve through the overflowing hole; the outer barrel is provided with a ball outlet end which is provided with an opening, a fusible baffle for plugging the opening is arranged between the ball outlet end and the central sleeve, the fusible baffle is made of a hot melting material and can be melted at the high temperature of steam, so that a plugging ball in a ball storage space is released, and due to the fact that the central sleeve of the ball injector is not internally provided with a guider and other structures, the passing of the steam is not influenced, and meanwhile, a testing instrument can conveniently enter a well.
Description
Technical Field
The invention belongs to the field of oil exploitation equipment, and particularly relates to a ball injection selecting pipe column and a ball injector.
Background
Steam injection exploitation is a main process technology for thick oil development, most thick oil blocks in oil fields enter the middle and later periods of huffing and puff, and along with the gradual increase of thermal recovery turns, because of the difference of physical properties between layers, the oil layer utilization is uneven after multiple steam injection production, the high and low permeability layers are contradictory and prominent, influence each other and interfere each other, which mainly shows that the high permeability layer absorbs more air during steam injection, the utilization is obvious, the low permeability layer absorbs less air, and the utilization degree is poor, so that the middle and low permeability layers cannot be effectively utilized. At present, selective injection process measures are often adopted in the production of thick oil, so that the steam absorption of an oil layer with higher power utilization degree is reduced or not, and simultaneously, the oil layer with lower power utilization degree is forced to improve the steam absorption.
Chinese utility model patent with grant bulletin number CN204457708U discloses a throw ball selection and annotate technology tubular column, including the sidetracking well ware of throwing, the sidetracking well ware of throwing includes the cylindric main joint that from the top down connected gradually, cylindric dress ball ware and cylindric lower clutch, contain the shutoff ball in the dress ball ware, contain the lower baffle that is used for preventing the shutoff ball from moving down in the dress ball ware, the baffle can melt down, between the lower extreme of baffle and lower clutch, the lateral wall of lower clutch is equipped with the bowling passageway that is used for the shutoff ball to pass and the lower clutch is used for guiding the shutoff ball to the director that this bowling passageway removed in to containing, during the use, go into corresponding position in the well with the tubular column, let in steam can make the lower baffle of dress ball ware one end melt to the dress ball ware, the shutoff ball just so can pass the bowling passageway, release and then carry out the shutoff to high permeable formation from the dress ball ware interior.
However, when the ball injector is used for steam injection of a horizontal well, the guide device can affect the steam passing and the descending of a testing instrument into the well.
Disclosure of Invention
The invention aims to provide a ball injector to solve the technical problems that the ball injector in the prior art can influence the passing of steam, can influence a testing instrument to be put into a well and is not beneficial to the release of a blocking ball; simultaneously, the utility model provides a bowling selection notes tubular column to solve the bowling ware among the prior art and can influence the passing through of steam, still can influence the well that goes into of testing instrument simultaneously, be unfavorable for the technical problem of shutoff ball release.
The ball injector adopts the following technical scheme:
a ball injector, comprising:
the central sleeve is used for being connected with adjacent pipe sections in the pipe column, and steam passes through the central sleeve;
the outer cylinder is sleeved outside the central sleeve, a ball storage space is formed between the outer cylinder and the central sleeve in a surrounding mode, and the ball storage space is used for storing the plugging balls;
the side wall of the central tube is provided with an overflowing hole, and steam enters the ball storage space from the central sleeve through the overflowing hole;
the outer barrel is provided with a ball outlet end, the ball outlet end is provided with an opening, a fusible baffle for plugging the opening is arranged between the ball outlet end and the central sleeve, the fusible baffle is made of a hot-melt material and can be melted at high temperature of steam, and therefore the plugging balls in the ball storage space are released.
Has the advantages that: the invention provides a ball injector, wherein an outer cylinder is sleeved outside a central sleeve, a ball storage space is enclosed between the outer cylinder and the central sleeve, and a blocking ball is stored in the ball storage space; after steam enters the ball storage space from the overflowing hole in the central sleeve, the outer barrel can melt due to the high temperature of the steam due to the fusible baffle between the ball outlet end of the outer barrel and the central sleeve, and therefore the blocking ball in the ball storage space can be released from the ball storage space.
As a further preferable technical solution, the outer cylinder is made of a hot-melt material, and the melting point of the fusible baffle is lower than the melting point of the outer cylinder.
Has the advantages that: therefore, when the tubular column with the ball injector is lifted out, steam with higher temperature can be injected into the central sleeve to melt the outer barrel, so that the tubular column can be conveniently lifted out of the horizontal well.
As a further preferred solution, the outer cartridge is made of a corrodible material for melting downhole under the action of a redox reaction of the galvanic cell.
Has the advantages that: in order to store more blocking balls in the ball storage space of the ball injector, the outer diameter of the outer cylinder is generally required to be designed to be larger, which results in a larger size of the ball injector. When the pipe column with the ball injector is used in a horizontal well for a long time, the pipe column is buried by sand due to sand production of the horizontal well, or the pipe column runs through a deflecting point between a vertical well and the horizontal well, so that the risk that the pipe column cannot be lifted out of the horizontal well occurs; and the well liquid is rich in chloride ions, and the outer cylinder is made of a corrodible material, so that the outer cylinder can be melted underground by using the redox reaction of the primary battery, and the size of the ball injector is reduced, so that the ball injector can be conveniently lifted out of the horizontal well.
As a further preferable technical scheme, through holes are formed in the fusible baffle and are communicated with two sides of the fusible baffle, and the through holes are used for steam to pass through.
Has the advantages that: the fusible baffle is provided with a through hole, and the steam flowing through the through hole can accelerate the melting of the fusible baffle.
According to a further preferable technical scheme, an outer cylinder support is arranged at the ball outlet end of the outer cylinder, the outer cylinder is supported and fixed on the central sleeve through the outer cylinder support, and a ball throwing channel for a blocking ball to pass through is formed in the outer cylinder support.
Has the advantages that: when the blocking ball flows out from the ball outlet end, the blocking ball can flow through the ball throwing channel on the outer cylinder bracket and is released to the outside of the ball throwing device.
As a further preferred technical scheme, the outer cylinder support is composed of an upper support ring, a lower retaining ring and an inclined support, the upper support ring is used for supporting the outer cylinder and the fusible baffle, the lower retaining ring is used for being fixed to the central sleeve, the inclined support is connected with the upper support ring and the lower retaining ring, and a space between the inclined supports forms the ball throwing channel.
Has the advantages that: the outer cylinder support supports the outer cylinder and the fusible baffle on the central sleeve, the stability of a ball storage space can be guaranteed, the inclined support can support the upper support ring and the lower baffle ring, the blocking ball can pass through the inclined support, and the structure of the outer cylinder support is simple.
As a further preferable technical scheme, a first annular step back to the central sleeve is arranged on the upper support ring, a second annular step facing the central sleeve is arranged at one end, close to the fusible baffle, of the outer cylinder, and the fusible baffle is clamped between the first annular step and the second annular step, so that the upper support ring supports the outer cylinder and the fusible baffle.
Has the advantages that: through setting up annular stair structure, realize simultaneously that the support ring supports urceolus and fusible baffle, make the simple structure of urceolus and urceolus support, convenient preparation.
As a further preferable technical scheme, one end of the central sleeve close to the outer cylinder support is further provided with a limiting joint, one end of the limiting joint is in threaded connection with the central sleeve and is in stop fit with the lower retaining ring, and the other end of the limiting joint is used for being connected with the lower joint.
Has the advantages that: the limiting joint can stop the outer barrel support and is convenient for connecting the lower joint.
As a further preferable technical scheme, an upper joint is further arranged at one end of the central sleeve, which is far away from the ball outlet end of the outer cylinder, the upper joint is provided with a third annular step facing the central sleeve, and the outer cylinder is provided with a fourth annular step facing away from the central sleeve, so that the outer cylinder and the upper joint are in stop fit in the axial direction and the radial direction of the central sleeve.
Has the advantages that: the upper joint can stop and match one end of the outer barrel, which is far away from the ball outlet end, so that a ball storage space is formed conveniently, and meanwhile, the upper joint can be connected with adjacent pipe columns.
The ball-throwing selective injection pipe column adopts the following technical scheme:
a shot-selecting injection string comprising:
the ball stopper is used for stopping the blocking ball from rising along with the liquid level;
the ball collector is used for recovering the blocking balls in the annular space;
the ball injector is used for injecting a blocking ball to block the perforation of the high-permeability oil layer;
the ball injector includes:
the central sleeve is used for being connected with adjacent pipe sections in the pipe column, and steam passes through the central sleeve;
the outer cylinder is sleeved outside the central sleeve, a ball storage space is formed between the outer cylinder and the central sleeve in a surrounding mode, and the ball storage space is used for storing the plugging balls;
the side wall of the central tube is provided with an overflowing hole, and steam enters the ball storage space from the central sleeve through the overflowing hole;
the outer barrel is provided with a ball outlet end, the ball outlet end is provided with an opening, a fusible baffle for plugging the opening is arranged between the ball outlet end and the central sleeve, the fusible baffle is made of a hot-melt material and can be melted at high temperature of steam, and therefore the plugging balls in the ball storage space are released.
Has the advantages that: the invention relates to a ball-throwing selective injection tubular column which comprises a ball-throwing device, wherein an outer cylinder is sleeved outside a central sleeve of the ball-throwing device, a ball storage space is enclosed between the outer cylinder and the central sleeve, and a blocking ball is stored in the ball storage space; the urceolus is made by hot melt material, after steam flowed into in the storage ball space from the discharge orifice on the central sleeve pipe, the urceolus goes out the fusible baffle between ball end and the central sleeve pipe, can the high temperature of steam and melts to the blocking ball in the storage ball space will be followed and stored up the release in the ball space, this kind of release blocking ball's mode, because do not set up structures such as director in the central sleeve pipe of bowling ware, thereby can not influence passing through of steam, make things convenient for under the test instrument go into the well.
As a further preferable technical solution, the outer cylinder is made of a hot-melt material, and the melting point of the fusible baffle is lower than the melting point of the outer cylinder.
Has the advantages that: when the pipe column is pulled out, steam with higher temperature can be injected into the central sleeve to melt the outer barrel, so that the pipe column can be pulled out from the horizontal well conveniently.
As a further preferred solution, the outer cartridge is made of a corrodible material for melting downhole under the action of a redox reaction of the galvanic cell.
Has the advantages that: in order to store more blocking balls in the ball storage space of the ball injector, the outer diameter of the outer cylinder is generally required to be designed to be larger, which results in a larger size of the ball injector. When the pipe column with the ball injector is used in a horizontal well for a long time, the pipe column is buried by sand due to sand production of the horizontal well, or the pipe column runs through a deflecting point between a vertical well and the horizontal well, so that the risk that the pipe column cannot be lifted out of the horizontal well occurs; and the well liquid is rich in chloride ions, and the outer cylinder is made of a corrodible material, so that the outer cylinder can be melted underground by oxidation-reduction reaction, the size of the ball injector is reduced, and the ball injector can be conveniently lifted out of the horizontal well.
As a further preferable technical scheme, through holes are formed in the fusible baffle and are communicated with two sides of the fusible baffle, and the through holes are used for steam to pass through.
Has the advantages that: the fusible baffle is provided with a through hole, and the steam flowing through the through hole can accelerate the melting of the fusible baffle.
According to a further preferable technical scheme, an outer cylinder support is arranged at the ball outlet end of the outer cylinder, the outer cylinder is supported and fixed on the central sleeve through the outer cylinder support, and a ball throwing channel for a blocking ball to pass through is formed in the outer cylinder support.
Has the advantages that: when the blocking ball flows out from the ball outlet end, the blocking ball can flow through the ball throwing channel on the outer cylinder bracket and is released to the outside of the ball throwing device.
As a further preferred technical scheme, the outer cylinder support is composed of an upper support ring, a lower retaining ring and an inclined support, the upper support ring is used for supporting the outer cylinder and the fusible baffle, the lower retaining ring is used for being fixed to the central sleeve, the inclined support is connected with the upper support ring and the lower retaining ring, and a space between the inclined supports forms the ball throwing channel.
Has the advantages that: the outer cylinder support supports the outer cylinder and the fusible baffle on the central sleeve, the stability of a ball storage space can be guaranteed, the inclined support can support the upper support ring and the lower baffle ring, the blocking ball can pass through the inclined support, and the structure of the outer cylinder support is simple.
As a further preferable technical scheme, a first annular step back to the central sleeve is arranged on the upper support ring, a second annular step facing the central sleeve is arranged at one end, close to the fusible baffle, of the outer cylinder, and the fusible baffle is clamped between the first annular step and the second annular step, so that the upper support ring supports the outer cylinder and the fusible baffle.
Has the advantages that: through setting up annular stair structure, realize simultaneously that the support ring supports urceolus and fusible baffle, make the simple structure of urceolus and urceolus support, convenient preparation.
As a further preferable technical scheme, one end of the central sleeve close to the outer cylinder support is further provided with a limiting joint, one end of the limiting joint is in threaded connection with the central sleeve and is in stop fit with the lower retaining ring, and the other end of the limiting joint is used for being connected with the lower joint.
Has the advantages that: the limiting joint can stop the outer barrel support and is convenient for connecting the lower joint.
As a further preferable technical scheme, an upper joint is further arranged at one end of the central sleeve, which is far away from the ball outlet end of the outer cylinder, the upper joint is provided with a third annular step facing the central sleeve, and the outer cylinder is provided with a fourth annular step facing away from the central sleeve, so that the outer cylinder and the upper joint are in stop fit in the axial direction and the radial direction of the central sleeve.
Has the advantages that: the upper joint can stop and match one end of the outer barrel, which is far away from the ball outlet end, so that a ball storage space is formed conveniently, and meanwhile, the upper joint can be connected with adjacent pipe columns.
Drawings
FIG. 1 is a schematic structural view of a ball injector according to an embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a cartridge holder in embodiment 1 of the ball injector of the present invention;
FIG. 3 is a top view of the outer cartridge holder of embodiment 1 of the pitch device of the present invention;
fig. 4 is a schematic diagram of the configuration of the ball injection selection string of the present invention.
In the figure: 1-upper joint, 2-outer cylinder, 21-second annular step, 3-central sleeve, 31-overflowing hole, 4-fusible baffle, 41-through hole, 5-outer cylinder bracket, 51-upper supporting ring, 511-first annular step, 52-diagonal support, 53-lower retaining ring, 6-limiting joint, 7-lower joint, 11-ball retainer, 12-ball injector, 13-steam injection sieve tube, 14-ball receiver, 15-high permeable layer, 16-low permeable layer, 17-third annular step and 18-fourth annular step.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Specific example 1 of the ball injector of the present invention:
as shown in fig. 1, the ball injector in the present embodiment comprises an upper joint 1, a central sleeve 3, an outer cylinder 2, a fusible baffle 4 and an outer cylinder bracket 5. Steam passes through the central sleeve 3, an overflowing hole 31 is formed in the side wall of the central sleeve 3, and the overflowing hole 31 allows the steam to enter the outer barrel 2 from the central sleeve 3.
The outer cylinder 2 is sleeved outside the central sleeve 3, the outer cylinder 2 is a straight cylinder, and two ends of the outer cylinder are both provided with openings. The up-down direction in fig. 1 is defined as the up-down direction of the ball injector. The upper end of the central sleeve 3 is provided with an upper joint 1, the upper joint 1 is provided with two threaded holes which are arranged in a back-to-back mode, the upper joint 1 is connected to the central sleeve 3 through one of the threaded holes, and the other threaded hole is used for connecting adjacent tubular columns in a threaded mode. The lower end of the upper joint 1 is provided with a third annular step 17 facing the central sleeve 3, the upper end of the outer cylinder 2 is provided with a fourth annular step 18 facing the central sleeve 3, so that the upper end of the outer cylinder 2 and the lower end of the upper joint 1 are in blocking fit in the axial direction and the radial direction of the central sleeve 3, and the upper joint 1 blocks an opening at the upper end of the outer cylinder 2.
The outer cylinder 2 has a ball outlet end, which is formed by an opening at the lower end of the outer cylinder 2 in this embodiment. The fusible baffle 4 is arranged at an opening at the lower end of the outer cylinder 2 and is positioned between the outer cylinder 2 and the central sleeve 3, and the fusible baffle 4 blocks the opening at the lower end of the outer cylinder 2, so that a storage space is formed between the outer cylinder 2 and the central sleeve 3 and is used for storing the blocking ball.
The fusible baffle 4 is provided with a through hole 41 which is vertically through, and the through hole 41 is used for steam to flow through. The fusible baffle 4 is made of PA66 material, and when the tubular column goes into the well, the blocking ball can be guaranteed not to fall out of the ball storage outer barrel above the fusible baffle 4, when the tubular column is in place and steam injection is started, the fusible baffle 4 starts to soften at 160 ℃ after steam passes through the through hole 41 and melts at 210 ℃, and the blocking ball is released from the ball outlet end to enter the oil sleeve annulus under the drive of the injected steam. In other embodiments, the through hole 41 may be an inclined hole as long as it can communicate with both sides of the fusible barrier.
In this embodiment, the outer cylinder 2 is made of a corrodible material, specifically, an aluminum magnesium composite metal material. Because the horizontal section that needs the shutoff in the horizontal well is longer, so need save shutoff ball quantity more, consequently for guaranteeing sufficient ball storage space, the length that will throw the urceolus 2 overall design of ball ware is longer usually, the external diameter is great, after long-time steam injection production, because horizontal well sand production, the tubular column is buried by sand, or when the tubular column passes through the kick-off point between vertical well and the horizontal well, the risk that the tubular column can not play from the horizontal well probably exists the risk that the instrument can not play, in order to ensure that the tubular column can safely play, design the urceolus that the external diameter is great, the diameter is longer for the corrodible material, utilize former battery redox reaction's principle, with the urceolus melting in the pit, reduce the size of ball ware, thereby be convenient for throw the ball ware and play from the horizontal well. The outer cylinder is completely dissolved within 3-30 days in the well, and the future lifting of the pipe column is not influenced.
The outer cylinder bracket 5 is sleeved below the central sleeve 3, and as shown in fig. 2 and 3, the outer cylinder bracket 5 is composed of an upper support ring 51, a lower retaining ring 53 and an inclined support 52. The upper support ring 51 is used for supporting the outer cylinder 2 and the fusible baffle 4, specifically, a first annular step 511 facing away from the central sleeve 3 is arranged on the upper support ring 51, a second annular step 21 facing the central sleeve 3 is arranged at one end, close to the fusible baffle 4, of the outer cylinder 2, and the fusible baffle 4 is clamped between the first annular step 511 and the second annular step 21, so that the upper support ring 51 supports the outer cylinder 2 and the fusible baffle 4.
The inclined supports 52 are located between the upper support ring 51 and the lower retaining ring 53, and three inclined supports are arranged along the circumferential direction of the outer cylinder bracket 5, in this embodiment, the inclined supports 52 are inclined plates. The inclined supports 52, the upper support ring 51 and the lower retaining ring 53 are fixed together by welding, the space between the inclined supports 52 forms the ball throwing channel, and the blocking ball flowing out from the ball outlet end can flow out from the space between the inclined supports 52. The lower retaining ring 53 is sleeved on the central sleeve 3, and the inner diameter thereof is smaller than that of the upper supporting ring 51.
The limiting joint 6 is arranged at one end, close to the outer cylinder support 5, of the central sleeve 3, the limiting joint 6 is provided with two threaded holes which are arranged in a back-to-back mode, one end of the limiting joint 6 is in threaded connection with the central sleeve 3 and is in blocking fit with the lower blocking ring 53, and the other end of the limiting joint is used for being connected with the lower joint 7.
When the ball stopper is used, steam enters the ball storage space from the overflowing hole 31 of the central sleeve 3 and flows through the through hole 41 on the fusible baffle 4, the fusible baffle 4 is firstly fused under the high-temperature action of the steam, so that a part of plugging balls in the ball storage space flow out from the lower end opening of the outer cylinder 2 and are released from the ball injector through the space between the inclined supports 52 of the outer cylinder support 5, and the plugging of the plugging balls on a high permeable layer of a horizontal well is realized. The outer cylinder 2 is gradually melted under the redox reaction of the primary battery in the horizontal well, so that the ball blocking device can be conveniently lifted out of the horizontal well.
Specific example 2 of the ball injector of the present invention:
in the embodiment 1, the outer cylinder is made of a corrodible material, and the outer cylinder 2 is gradually melted under the redox reaction of the primary battery in the horizontal well, so that the ball stopper can be conveniently lifted out of the horizontal well. In the embodiment, the outer cylinder is made of a hot-melting material, the melting point of the fusible baffle is lower than that of the outer cylinder, and when the pipe column is pulled out, steam with higher temperature can be injected into the central sleeve to melt the outer cylinder, so that the pipe column can be conveniently pulled out of the horizontal well.
Specific example 3 of the ball injector of the present invention:
in embodiment 1, the fusible baffle 4 is provided at the ball outlet end of the outer cylinder 2. In this embodiment, both ends of the outer cylinder are provided with fusible baffles 4, so that the blocking balls can be released from both ends of the ball injector.
Specific example 4 of the ball injector of the present invention:
in example 1, the melting point of the fusible baffle 4 is lower than that of the outer cylinder 2. In this embodiment, the fusible barrier has a higher melting point than the outer barrel so that the outer barrel melts first and the fusible barrier melts later.
Specific example 5 of the ball injector of the present invention:
in embodiment 1, the outer cylinder bracket 5 is sleeved on the central sleeve 3, and the lower end is locked by the limiting joint 6. In this embodiment, the lower retaining ring of the outer cylinder support has an internal thread, and the outer cylinder support is directly screwed to the center sleeve through the lower retaining ring.
Specific example 6 of the ball injector of the present invention:
in embodiment 1, the central sleeve 3 is provided with a limiting joint 6, one end of the limiting joint 6 is used for stopping the outer cylinder bracket, and the other end of the limiting joint 6 is used for connecting a lower joint, and the limiting joint and the connecting joint are integrally arranged. In this embodiment, the limiting joint is a locking ring with threads and is only used for locking the lower retaining ring on the central casing, and a connecting joint is further arranged below the limiting joint on the central casing and is used for connecting adjacent lower joints or adjacent pipe columns, and the limiting joint and the connecting joint are arranged in a split manner.
Specific example 7 of the ball injector of the present invention:
in embodiment 1, the diagonal brace is connected between the upper support ring 51 and the lower retainer ring 53 of the outer cylinder bracket 5, and the diagonal brace 52 is a sloping plate. In this embodiment, the diagonal supports are L-shaped flaps, the spacing between which is for the passage of the plugging ball. In other embodiments, the outer cylinder bracket may be a supporting cylinder, the opening of the supporting cylinder is large and small, the end with the large opening is in stop fit with the outer cylinder, the end with the small opening is sleeved on the central sleeve, and a through hole for the plugging ball to pass through is arranged on the cylinder corresponding to the fusible baffle.
Specific example 8 of the ball injector of the present invention:
in embodiment 1, one end of the fusible link 4 is sandwiched between the outer cylinder 2 and the annular step of the upper support ring 51. In this embodiment, the fusible baffle has a downward extending folded edge, the upper support ring 51 of the outer cylinder support is provided with a groove, and the outer cylinder and the folded edge of the fusible baffle together extend into the groove to be matched with the outer cylinder support in a blocking manner.
as shown in fig. 4, the ball-throwing and selecting injection pipe column of the present invention includes a steam-injection sieve pipe 13, and a ball stopper 11, a ball-throwing device 12 and a ball-collecting device 14 are sequentially sleeved on the steam-injection sieve pipe 13. The steam injection sieve tube 13 is provided with air holes, and steam can flow out of the air holes so as to achieve the purpose of heating and viscosity reduction of an oil layer.
The ball injector 12 is located between the ball injector 11 and the ball collector 14 and used for injecting the blocking balls to block perforation holes of high-permeability oil layers, the ball collector 14 is located at the downstream of the steam injection screen pipe and used for recovering the blocking balls in the annular space, and the ball stopper 11 is located at the upstream of the steam injection screen pipe and can prevent the blocking balls released in the ball injector from moving along with the liquid level. The tubular column is used in a horizontal well, when the tubular column is used, the tubular column is wholly lowered into the annular space of the horizontal well, the ball injector 12 corresponds to the high-permeability layer 15, the tubular column can be tightly attached to the side wall of the casing pipe in the downward casing pipe by the ball injector 11, the tubular column is centered, and the smooth lowering of the tubular column is guaranteed.
The structure of the ball injector in this embodiment is the same as that in the ball injector embodiment, and when the blocking ball is released from the ball injector 12, the blocking ball can block the blasthole of the high permeable layer 15, so that the steam absorption amount of the high permeable layer 15 is reduced or not, and further the steam absorption amount of the low permeable layer 16 is increased, and the using degree is obvious.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A ball injector, its characterized in that: the method comprises the following steps:
the central sleeve is used for being connected with adjacent pipe sections in the pipe column, and steam passes through the central sleeve;
the outer cylinder is sleeved outside the central sleeve, a ball storage space is formed between the outer cylinder and the central sleeve in a surrounding mode, and the ball storage space is used for storing the plugging balls;
the side wall of the central tube is provided with an overflowing hole, and steam enters the ball storage space from the central sleeve through the overflowing hole;
the outer barrel is provided with a ball outlet end, the ball outlet end is provided with an opening, a fusible baffle for plugging the opening is arranged between the ball outlet end and the central sleeve, the fusible baffle is made of a hot-melt material and can be melted at high temperature of steam, and therefore the plugging balls in the ball storage space are released.
2. The pitch thrower of claim 1, wherein: the outer cylinder is made of a hot melting material, and the melting point of the fusible baffle is lower than that of the outer cylinder.
3. The pitch thrower of claim 1, wherein: the outer barrel is made of a corrodible material and is used for melting underground under the action of redox reaction of the primary battery.
4. A pitch device according to claim 1, 2 or 3, wherein: the fusible baffle is provided with a through hole, the through hole is communicated with the two sides of the fusible baffle, and the through hole is used for steam to pass through.
5. A pitch device according to claim 1, 2 or 3, wherein: the ball outlet end of the outer barrel is provided with an outer barrel support, the outer barrel is supported and fixed on the central sleeve through the outer barrel support, and the outer barrel support is provided with a ball throwing channel for the blocking ball to pass through.
6. The pitch thrower of claim 5, wherein: the urceolus support comprises last supporting ring, lower fender ring and diagonal bracing, it is used for supporting urceolus and fusible baffle to go up the supporting ring, keep off the ring down and be used for fixing to central sleeve pipe, diagonal bracing connects the upper support ring and keeps off the ring down, space between the diagonal bracing constitutes the bowling passageway.
7. The pitch thrower of claim 6, wherein: the upper supporting ring is provided with a first annular step back to the central sleeve, one end of the outer barrel, close to the fusible baffle, is provided with a second annular step facing the central sleeve, and the fusible baffle is clamped between the first annular step and the second annular step, so that the upper supporting ring supports the outer barrel and the fusible baffle.
8. The pitch thrower of claim 7, wherein: and one end of the central sleeve, which is close to the outer barrel support, is also provided with a limiting joint, one end of the limiting joint is in threaded connection with the central sleeve and is in stop fit with the lower retainer ring, and the other end of the limiting joint is used for connecting the lower joint.
9. A pitch device according to claim 1, 2 or 3, wherein: the end, far away from the ball outlet end of the outer barrel, of the central sleeve is further provided with an upper joint, the upper joint is provided with a third annular step facing the central sleeve, the outer barrel is provided with a fourth annular step back to the central sleeve, and therefore the outer barrel and the upper joint are in blocking fit in the axial direction and the radial direction of the central sleeve.
10. A shot-selecting injection string comprising:
the ball stopper is used for stopping the blocking ball from rising along with the liquid level;
the ball collector is used for recovering the blocking balls in the annular space;
the ball injector is used for injecting a blocking ball to block the perforation of the high-permeability oil layer;
the method is characterized in that: the pitch injector as claimed in any of claims 1-9.
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| CN202010455562.0A CN111677488A (en) | 2020-05-26 | 2020-05-26 | Ball throwing and selecting injection pipe column and ball throwing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010455562.0A CN111677488A (en) | 2020-05-26 | 2020-05-26 | Ball throwing and selecting injection pipe column and ball throwing device |
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| CN111677488A true CN111677488A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010455562.0A Pending CN111677488A (en) | 2020-05-26 | 2020-05-26 | Ball throwing and selecting injection pipe column and ball throwing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4702316A (en) * | 1986-01-03 | 1987-10-27 | Mobil Oil Corporation | Injectivity profile in steam injection wells via ball sealers |
| CN202391378U (en) * | 2012-01-13 | 2012-08-22 | 中国石油天然气股份有限公司 | Automatic ball injecting and receiving device for selective injection of casing deformation wells |
| CN204457708U (en) * | 2014-12-31 | 2015-07-08 | 中国石油天然气股份有限公司 | Pitching choosing note process pipe string |
| CN106801590A (en) * | 2017-01-20 | 2017-06-06 | 北京中科金腾科技有限公司 | A kind of dissolvable slips and bridging plug |
| CN110374547A (en) * | 2019-06-12 | 2019-10-25 | 中国石油化工股份有限公司 | A kind of ball injector and the Thickened oil injection-production integrated pipe column using the ball injector |
-
2020
- 2020-05-26 CN CN202010455562.0A patent/CN111677488A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4702316A (en) * | 1986-01-03 | 1987-10-27 | Mobil Oil Corporation | Injectivity profile in steam injection wells via ball sealers |
| CN202391378U (en) * | 2012-01-13 | 2012-08-22 | 中国石油天然气股份有限公司 | Automatic ball injecting and receiving device for selective injection of casing deformation wells |
| CN204457708U (en) * | 2014-12-31 | 2015-07-08 | 中国石油天然气股份有限公司 | Pitching choosing note process pipe string |
| CN106801590A (en) * | 2017-01-20 | 2017-06-06 | 北京中科金腾科技有限公司 | A kind of dissolvable slips and bridging plug |
| CN110374547A (en) * | 2019-06-12 | 2019-10-25 | 中国石油化工股份有限公司 | A kind of ball injector and the Thickened oil injection-production integrated pipe column using the ball injector |
Non-Patent Citations (1)
| Title |
|---|
| 杨康敏等: ""投球选层注汽工艺技术在河南油田的应用研究"", 《内蒙古石油化工》 * |
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