CN216477279U - Integrated self-filling sand-proof paraffin-proof oil forced extraction tool - Google Patents
Integrated self-filling sand-proof paraffin-proof oil forced extraction tool Download PDFInfo
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- CN216477279U CN216477279U CN202123347710.6U CN202123347710U CN216477279U CN 216477279 U CN216477279 U CN 216477279U CN 202123347710 U CN202123347710 U CN 202123347710U CN 216477279 U CN216477279 U CN 216477279U
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Abstract
The utility model discloses an integrated self-filling sand-control paraffin-control oil forced extraction tool, including locating oil pipe cluster, first oil pipe and the pump in the oil well casing, the pump stretches into in the first oil pipe, still including locating second oil pipe, third oil pipe and the sand screen in the oil well casing, first oil pipe connects the second oil pipe downwards, the lower part of second oil pipe stretches into in the third oil pipe, and the third oil pipe bottom extends to the oil reservoir, and the outer wall of the third oil pipe part in the oil reservoir twines the sand screen, and is provided with the punchhole on the outer wall of the third oil pipe part in the oil reservoir, and the oil gets into the second oil pipe from the punchhole, and the oil that will be extracted is discharged to the oil pipe cluster by the pump; the outer diameter of the second oil pipe is smaller than the inner diameter of the third oil pipe. The utility model has simple and reasonable structure, the second oil pipe is put below the oil layer, which is equivalent to putting the liquid inlet of the pump below the oil layer, thereby realizing the maximum production pressure difference amplification and digging the liquid supply capacity of the oil layer to the limit; and high-efficiency oil extraction in the oil exploitation process is realized.
Description
Technical Field
The utility model relates to an oil development technical field, concretely relates to self-filling sand control paraffin prevention oil of integral instrument of adopting by force.
Background
At present, Bektas oil reservoirs of Kazakhstan K & B oil fields have low pressure and low temperature, are cemented and loose, and have coexisting sand and wax. The oil well sand production phenomenon is common during oil field exploitation, production is influenced, in order to adapt to small-amount sand-carrying production and avoid stratum excitation and local high-speed liquid outlet aggravation sand production, a passive mode that a pump hanger is lifted up, liquid quantity is increased by gradual parameter adjustment and filter is hung under a pump to prevent stratum sand from entering a pump barrel is generally adopted for production, and the due potential of the stratum is not exerted. From the current production condition of oil wells and the implementation condition of production increasing measures, sand and wax are main factors for restricting the extract, wax is seriously deposited to block blast holes of production intervals, and especially sand production prevention becomes an important problem for restricting the extract production in the next step. The working of the oil field extract comprises the optimization of a matching technology of a forced injection and forced extraction process and the improvement of comprehensive treatment of an extract shaft, aiming at the problem of 'sand and wax' influencing the extract, the well is managed by one plan, classified treatment is carried out, and the extract is improved to the maximum extent by optimizing lifting, sand prevention and wax removal, oil layer reconstruction, well workover measures and an operation matching technology.
The sand control and wax control of the petroleum extract forced extraction tool in the prior art are usually carried out by adopting separate tools, and the problems of complex structure, difficult matching of all parts, poor wax control and sand control effects, easy blockage and the like exist.
Therefore, an integrated self-filling sand-prevention and wax-prevention oil forced extraction tool with a simple structure is urgently needed to realize high-efficiency oil extraction in the oil extraction process and realize sand prevention and wax prevention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the oil extraction forced mining tool in the prior art has the problems of complicated structure, difficult matching of all parts, poor wax prevention and sand prevention effects, easy blockage, poor oil exploitation effect and the like. The utility model aims at providing an integrated self-filling sand control paraffin prevention oil forced extraction tool, the utility model has the advantages of simple and reasonable structure, and each part cooperation is easy, realizes oil recovery with high efficiency in the oil recovery process, and has sand control, paraffin prevention function simultaneously.
The utility model discloses a following technical scheme realizes:
in a first aspect, the utility model provides an integrated self-filling sand-control paraffin-control oil forced extraction tool, which comprises an oil pipe string, a first oil pipe and a pump, wherein the oil pipe string, the first oil pipe and the pump are arranged in an oil well casing, the pump extends into the first oil pipe, and the extracted oil is discharged to the oil pipe string; the oil-water separator is characterized by further comprising a second oil pipe, a third oil pipe and a sand filter pipe which are arranged in the oil well casing, wherein the first oil pipe is downwards connected with the second oil pipe, the lower part of the second oil pipe extends into the third oil pipe, the bottom of the third oil pipe extends to an oil layer, the sand filter pipe is wound on the outer wall of the third oil pipe part in the oil layer, perforations are arranged on the outer wall of the third oil pipe part in the oil layer, oil enters the second oil pipe from the perforations, and the extracted oil is discharged to an oil pipe string by the pump; the outer diameter of the second oil pipe is smaller than the inner diameter of the third oil pipe.
Wherein, the utility model discloses a pump can be screw pump or tubular pump.
The working principle is as follows: based on the problems that the structure of an oil extract forced extraction tool in the prior art is complex, all parts are difficult to match, and the oil extraction effect is poor, the utility model discloses an integrated self-filling sand-prevention and wax-prevention oil forced extraction tool, which comprises an oil pipe string, a first oil pipe, a pump, a second oil pipe, a third oil pipe and a sand filter pipe, which are arranged in an oil well casing, on the basis of the oil pipe string, the first oil pipe and the pump in the prior art, firstly, a small oil pipe (namely, the second oil pipe) and a large oil pipe (namely, the third oil pipe) are designed, and the small oil pipe is put below an oil layer, which is equivalent to putting an inlet of the pump below the oil layer, so that the production pressure difference can be amplified to the maximum extent, and the liquid supply capacity of the oil layer is excavated to the limit; secondly, when the pump is checked, an oil pipe string, a pump cylinder and a small oil pipe in a shaft do not need to be taken out, a third oil pipe with phi 73mm is added from the ground, and a second oil pipe (with the outer diameter phi 48.3mm) of 1.9in is utilized to filter an inner cavity of the sand filter pipe to realize sand detection and sand washing to clean deposits in a casing space below the sand filter pipe, so that one operation procedure is reduced, the operation time rate is improved, and the operation cost is saved; thirdly, the outer diameter of the second oil pipe is smaller than the inner diameter of the third oil pipe, which means that the flow speed of the liquid in the second oil pipe with the outer diameter phi of 48.3mm is higher than that of phi 73mm under the same flow, so that the second oil pipe has the function of a speed pipe, the degassing of crude oil entering a pump is reduced, the pump effect can be improved, and the production purpose of the strong extraction liquid is facilitated; fourthly, when the well is washed by hot oil in the production process, the hot oil can circularly wash and clean all inner cavities of the precise sand filtering pipes and can wash all filter joints, so that the full-coverage paraffin removal effect on the inner cavities of the precise sand filtering pipes is realized; and the space of the casing pipe which is 0.5 to 1.0 meter below the bottom boundary of the oil layer can be cleaned by flushing, so that the filtering sand pipe can clean the shaft.
The utility model has simple and reasonable structure, designs the integrated small oil pipe (namely, the second oil pipe) and the large oil pipe (namely, the third oil pipe), and puts the small oil pipe below the oil layer, which is equivalent to putting the inlet of the pump below the oil layer, thereby realizing the purpose of amplifying the production pressure difference to the maximum extent and digging the liquid supply capacity of the oil layer to the limit; and high-efficiency oil extraction in the oil exploitation process is realized.
The sleeved nylon oil pipe centralizer is arranged at the bottom of the first oil pipe and used for centralizing the first oil pipe; and a centralizer is arranged at the bottom of the sand filtering pipe and used for centralizing the sand filtering pipe.
The bottom of the first oil pipe is connected with a second oil pipe through the oil pipe variable buckle joint;
and the oil pipe buckle changing joint and the second oil pipe form a liquid inlet channel which is immediately arranged below the pump.
And further, the packer comprises a releasing packer which is arranged at the top of the third oil pipe, the third oil pipe downwards passes through the releasing packer, and the releasing packer is externally connected with a releasing service tool and is used as an oil pipe pressure test tool before setting.
Further, the outer diameter of the first oil pipe is 73mm, and the inner diameter of the first oil pipe is 62 mm;
the outer diameter of the second oil pipe is 48.3mm, the inner diameter of the second oil pipe is 35.6mm, and the length of the second oil pipe is 17 m;
the outer diameter of the third oil pipe is 73mm, the inner diameter of the third oil pipe is 62mm, and the length of the third oil pipe is 9.5 m;
the first oil pipe is a 2-3/8in flat oil pipe, and the second oil pipe is a 1.9in oil pipe.
Further, the ratio of the cross-sectional area of the second oil pipe to the cross-sectional area of the third oil pipe is 3: 1, the flow velocity of the liquid in the second oil pipe with the outer diameter of phi 48.3mm is 3 times higher than that of the liquid in the third oil pipe with the outer diameter of phi 73mm under the same flow, so that the second oil pipe has the function of a velocity pipe, the degassing of crude oil entering a pump is reduced, the pump efficiency can be improved, and the production purpose of strong extraction liquid is facilitated.
The utility model discloses there are two kinds of design thinking to the sand setting pocket:
(1) the first design idea is as follows: designing a tail pipe and a plug as a sand setting pocket, wherein the bottom of the third oil pipe is sequentially provided with the tail pipe and the plug; the tail pipe is 50m in length; an annular space is formed between a third oil pipe above the sand filter pipe and below the releasing packer and the second oil pipe for wax precipitation, and meanwhile, a further wax precipitation space is formed between the second oil pipe above the releasing packer and below the sleeved nylon oil pipe centralizer and the casing pipe; simple sand setting and wax precipitation are realized.
Meanwhile, the design solves the problem of operation salvage caused by partial or complete breakage of the phi 48.3mm second oil pipe due to corrosion or abrasion in the production process, the disconnected phi 48.3mm second oil pipe can fall into the phi 73mm oil pipe with the outer diameter connected with the lower part of the precision sand filtering pipe casing, the tail pipe with the outer diameter of phi 73mm with the lower part reaches 50 meters, the bottom is dead and blocked, the phi 48.3mm second oil pipe fallen due to breakage is just supported, and the phi 48.3mm second oil pipe can be completely accommodated due to sufficient length, the fish top is lower than the bottom boundary of the oil layer, so the fish top can not be blocked in the inner cavity of the sand filtering pipe at the oil layer part to influence the formation liquid supply after the pump detection, more importantly, a special fishing tool is not required to be arranged immediately to fish out the second oil pipe with the phi of 48.3mm falling into the bottom of the well, and if the sand filtering pipe needs to be fished out after the pump is checked, the second oil pipe with the phi of 48.3mm falling into the tail pipe pocket due to fracture is taken out of the ground together.
(2) The second design idea is as follows: the lower part of the second oil pipe is designed to extend into the third oil pipe, and the bottom of the second oil pipe extends out of the third oil pipe; a leather cup packer is reversely arranged at the bottom of the sand filtering pipe with a bowl opening facing upwards; and a closed sand setting annular space is formed between the leather cup packer and the releasing packer and is used as a sand setting pocket. Specifically, the lower part of the second oil pipe extends into an oil pipe short joint inner cavity below a bottom boundary of a filtering seam in the sand filtering pipe inner cavity, penetrates through the sand filtering pipe inner cavity, extends out of the oil pipe short joint, and extends for a distance of 0.5-1.0m beyond the bottom boundary of the oil layer.
This design is at a leather cup packer of reverse dress up of accurate sand screen bottom portion bowl mouth, and its effect has two points: firstly, the system device is formed together with a releasing packer at the upper part of a precise sand filtering pipe, the upper annular space and the lower annular space of an oil layer which are right opposite to the precise sand filtering pipe are sealed, so that liquid from a stratum can only enter an annular space which is formed by a central pipe of the precise sand filtering pipe and a second oil pipe which is connected below a pump and has the outer diameter of 48 millimeters, then flows downwards, enters an opening at the bottom of the second oil pipe with the diameter of 48 millimeters, and then flows upwards and rapidly to enter the pump; and secondly, the sand setting annular space is used as a sand prevention tool, and sand from the stratum is contained in the sand setting annular space and is filled to form a sand blocking ring.
Meanwhile, the design avoids the problem of difficult operation salvage caused by corrosion or partial or complete breakage of the phi 48.3mm second oil pipe due to abrasion in the production process, because enough space of a sleeve sand setting pocket is provided, the phi 48.3mm second oil pipe can be completely contained by the space of the sleeve pocket below the sand filtering pipe, the fish top of the second oil pipe is lower than the bottom boundary of an oil layer, and therefore the second oil pipe cannot be blocked in the inner cavity of the sand filtering pipe at the oil layer part to influence formation liquid supply after pump inspection, more importantly, a special salvage tool is not required to be immediately equipped to salvage the phi 48.3mm second oil pipe falling into an artificial well bottom, and if the sand filtering pipe which needs to be fished out after pump inspection is not influenced by the dropping of the phi 48.3mm second oil pipe. The fishing operation can be normally executed. The function solves the difficult problem of how to avoid fishing after the second oil pipe with the small diameter is broken and falls into the well as the speed pipe, and can normally execute fishing operation.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model designs a small oil pipe (namely, a second oil pipe) and a big oil pipe (namely, a third oil pipe), and the small oil pipe is put below the oil layer, which is equivalent to putting the liquid inlet of the pump below the oil layer, thereby realizing the maximum production pressure difference amplification and digging the liquid supply capacity of the oil layer to the limit; and high-efficiency oil extraction in the oil extraction process is realized.
2. The utility model discloses when examining the pump operation, can need not play oil pipe cluster, pump barrel, little oil pipe in the pit shaft, from the additional phi 73 mm's of ground third oil pipe, utilize 1.9in second oil pipe (external diameter phi 48.3mm), come the deposit in the casing space that the sand screen inner chamber realized visiting the sand face and washed sand clearance sand screen below, reduced one operation process in other words, the rate when having improved the operation and saved the working cost.
3. The outer diameter of the second oil pipe of the utility model is smaller than the inner diameter of the third oil pipe, which means that the flow speed of the liquid in the second oil pipe with the outer diameter phi 48.3mm is higher than that of the liquid in the second oil pipe with the outer diameter phi 73mm under the same flow, therefore, the second oil pipe has the function of a speed pipe, simultaneously reduces the degassing of crude oil entering a pump, can improve the pump effect and is helpful to realize the production purpose of the strong extraction liquid; in particular, the ratio of the cross-sectional area of the second oil pipe to the cross-sectional area of the third oil pipe is 3: 1, the flow velocity of the liquid in the second oil pipe with the outer diameter of phi 48.3mm is higher than that of phi 73mm under the same flow, so that the second oil pipe has the function of a velocity pipe, the degassing of crude oil entering a pump is reduced, the pump efficiency can be improved, and the production purpose of strong recovery extract is facilitated.
4. When the hot oil is used for washing the well in the production process of the utility model, the hot oil can circularly wash and clean all the inner cavities of the precise sand filtering pipes and can wash all the filter joints, thereby realizing the full-coverage paraffin removal effect on the inner cavities of the precise sand filtering pipes; and the space of the casing pipe which is 0.5 to 1.0 meter below the bottom boundary of the oil layer can be cleaned by flushing, so that the filtering sand pipe can clean the shaft.
5. The utility model discloses second oil pipe's lower part stretches into strain of sand screen inner chamber meet in the oil pipe short circuit inner chamber below the bottom boundary, and pass the sand screen inner chamber stretches out beyond the oil pipe short circuit, and stretch out length and exceed the oil layer bottom boundary 0.5-1.0m distance. Therefore, the problem of difficulty in operation fishing caused by corrosion or partial or complete breakage of the phi 48.3mm second oil pipe in the production process is solved, because enough space of a sleeve sand settling pocket is provided, the phi 48.3mm second oil pipe can be completely contained in the space of the sleeve pocket below the sand filter pipe, and the fish top of the second oil pipe is lower than the bottom boundary of an oil layer, so that the second oil pipe cannot be blocked in the inner cavity of the sand filter pipe at the oil layer part to influence formation liquid supply after pump detection, more importantly, a special fishing tool is not required to be immediately equipped to fish the phi 48.3mm second oil pipe falling into an artificial well bottom, and if the sand filter pipe needing to be fished out after pump detection is not influenced by the fact that the phi 48.3mm second oil pipe falls into the well. The fishing operation can be normally executed. The function solves the difficult problem of how to avoid fishing after the second oil pipe with small diameter is broken and falls into the well as the speed pipe.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is the utility model relates to an integrated self-filling sand control paraffin prevention oil forced extraction tool embodiment 1 structure schematic diagram.
Fig. 2 is the utility model relates to an integrated self-filling sand control paraffin prevention oil forced extraction tool embodiment 2 schematic structure.
Reference numerals and corresponding part names:
1-tubing string, 2-pump, 3-sleeved nylon tubing centralizer, 4-tubing change-over joint, 5-second tubing, 6-release packer, 7-third tubing, 8-sand filter, 9-tubing short joint, 10-first tubing, 11-plug, 12-artificial well bottom, 13-casing, 14-magnetic positioning short joint, 15-cup packer and 16-tail pipe.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
As shown in fig. 1, the utility model relates to an integrated self-filling sand-control paraffin-control oil forced extraction tool, which comprises an oil pipe string 1 arranged in an oil well casing 13, a first oil pipe 10 and a pump 2, wherein the pump 2 extends into the first oil pipe 10, and the extracted oil is discharged to the oil pipe string 1; the oil-water separator is characterized by further comprising a second oil pipe 5, a third oil pipe 7 and a sand filtering pipe 8 which are arranged in an oil well casing 13, wherein the first oil pipe 10 is connected with the second oil pipe 5 downwards, the lower part of the second oil pipe 5 extends into the third oil pipe 7, the bottom of the third oil pipe 7 extends to an oil layer, the sand filtering pipe 8 is wound on the outer wall of the part, inside the oil layer, of the third oil pipe 7, a hole is formed in the outer wall of the part, inside the oil layer, of the third oil pipe 7, oil enters the second oil pipe 5 from the hole, and the pump 2 discharges the produced oil to the oil pipe string 1; the outer diameter of the second oil pipe 5 is smaller than the inner diameter of the third oil pipe 7.
Wherein, the pump 2 of the utility model can be a screw pump or a tubular pump.
In the embodiment, the device further comprises a sleeved nylon oil pipe centralizer 3, wherein the sleeved nylon oil pipe centralizer 3 is arranged at the bottom of the first oil pipe 10 and used for centralizing the first oil pipe 10; and a centralizer is arranged at the bottom of the sand filtering pipe 8 and used for centralizing the sand filtering pipe 8.
In the embodiment, the oil pipe buckling-restrained joint further comprises an oil pipe buckling-restrained joint 4, and the bottom of the first oil pipe 10 is connected with a second oil pipe 5 through the oil pipe buckling-restrained joint 4;
the oil pipe buckle joint 4 and the second oil pipe 5 form a liquid inlet channel which is arranged under the pump 2.
In the embodiment, the packer comprises a releasing packer 6, the releasing packer 6 is arranged at the top of a third oil pipe 7, the third oil pipe 7 downwards penetrates through the releasing packer 6, and the releasing packer 6 is externally connected with a releasing service tool and serves as an oil pipe pressure testing tool before setting.
When the utility model is implemented, the utility model discloses the direction is gone into from the well head to the shaft bottom to figure 1: an oil pipe string 1, a first oil pipe 10, a pump 2, a sleeved nylon oil pipe centralizer 3, an oil pipe buckle joint 4, a second oil pipe 5, a releasing packer 6, a third oil pipe 7, a sand filter pipe 8, an oil pipe short joint 9, a leather cup packer 15 (a large opening is arranged downwards and a small opening is arranged upwards in a reversed mode), and an artificial well bottom 12 are sequentially arranged; the specification and the size of all the pipe columns in the shaft in the running direction from the well head to the bottom of the well correspond to the numerical sequence number in the figure as shown in the following table 1:
TABLE 1 Integrated list of names and specifications of well tube columns of self-filling sand-proof and wax-proof oil well-forced extraction tool
In this embodiment, the outer diameter of the first oil pipe 10 is 73mm, and the inner diameter is 62 mm;
the outer diameter of the second oil pipe 5 is 48.3mm, the inner diameter of the second oil pipe 5 is 35.6mm, and the length of the second oil pipe 5 is 17 m;
the outer diameter of the third oil pipe 7 is 73mm, the inner diameter of the third oil pipe 7 is 62mm, and the length of the third oil pipe 7 is 9.5 m;
wherein the first oil pipe 10 is a 2-3/8in flat oil pipe, and the second oil pipe 5 is a 1.9in oil pipe.
In this embodiment, the ratio of the cross-sectional area of the second oil pipe 5 to the cross-sectional area of the third oil pipe 7 is 1: 3, the flow rate of the liquid in the second oil pipe 5 with the outer diameter phi 48.3mm is 3 times higher than that of the liquid in the third oil pipe 7 with the outer diameter phi 73mm under the same flow rate, so that the second oil pipe 5 has the function of a speed pipe, the degassing of crude oil entering a pump is reduced, the pump efficiency can be improved, and the production purpose of the strong extraction liquid is facilitated.
The utility model discloses design to the sand setting pocket as follows:
designing a tail pipe 16 and a plug 11 as a sand setting pocket, wherein the bottom of the third oil pipe is sequentially provided with the tail pipe 16 and the plug 11; tailpipe 16 has a length of 50 m; an annular space is formed between a third oil pipe above the sand filter pipe and below the releasing packer and the second oil pipe for wax precipitation, and meanwhile, a further wax precipitation space is formed between the second oil pipe above the releasing packer and below the sleeved nylon oil pipe centralizer and the casing pipe; simple sand setting and wax precipitation are realized.
Meanwhile, the design solves the problem of operation salvage caused by partial or complete breakage of the phi 48.3mm second oil pipe due to corrosion or abrasion in the production process, the disconnected phi 48.3mm second oil pipe can fall into the phi 73mm oil pipe with the outer diameter connected with the lower part of the precision sand filtering pipe sleeve, the tail pipe 16 with the outer diameter of phi 73mm with the lower part reaches 50 meters, the bottom is dead and blocked, and the phi 48.3mm second oil pipe fallen due to breakage can be exactly supported, and due to sufficient length, the phi 48.3mm second oil pipe can be completely accommodated, the fish top is lower than the bottom boundary of the oil layer, so the fish top can not be blocked in the inner cavity of the sand filtering pipe at the oil layer part to influence the formation liquid supply after the pump detection, more importantly, a special fishing tool is not required to be arranged immediately to fish out the second oil pipe with the phi of 48.3mm falling into the bottom of the well, if the sand filter pipe needs to be fished out after the pump is inspected, the second oil pipe with the diameter of 48.3mm falling into the pocket of the tail pipe 16 due to fracture is taken out of the ground together.
The working principle is as follows: based on the problems that the prior art petroleum extract forced extraction tool has a complex structure, each part is difficult to match, and the petroleum extraction effect is poor, the utility model discloses an integrated self-filling sand-prevention and wax-prevention petroleum forced extraction tool, which comprises an oil pipe string, a first oil pipe 10, a pump, a second oil pipe, a third oil pipe and a sand filter pipe, which are arranged in a petroleum well casing, on the basis of the prior art oil pipe string, the first oil pipe and the pump, firstly, a small oil pipe (namely, the second oil pipe) and a large oil pipe (namely, the third oil pipe) are designed, the small oil pipe is put below an oil layer, which is equivalent to putting a liquid inlet of the pump below the oil layer, so that the production pressure difference can be amplified to the maximum extent, and the liquid supply capacity of the oil layer is excavated to the limit; secondly, when the pump is checked, an oil pipe string, a pump cylinder and a small oil pipe in a shaft do not need to be taken out, a third oil pipe with phi 73mm is added from the ground, and a second oil pipe (with the outer diameter phi 48.3mm) of 1.9in is utilized to filter an inner cavity of the sand filter pipe to realize sand detection and sand washing to clean deposits in a casing space below the sand filter pipe, so that one operation procedure is reduced, the operation time rate is improved, and the operation cost is saved; thirdly, the ratio of the cross-sectional area of the second oil pipe to the cross-sectional area of the third oil pipe is 3: 1, the flow velocity of the liquid in the second oil pipe with the outer diameter of phi 48.3mm is higher than that of phi 73mm under the same flow, so that the second oil pipe has the function of a velocity pipe, the degassing of crude oil entering a pump is reduced, the pump efficiency can be improved, and the production purpose of the enhanced recovery extract is facilitated; fourthly, when the well is washed by hot oil in the production process, the hot oil can circularly wash and clean all inner cavities of the precise sand filtering pipes and can wash all filter joints, so that the full-coverage paraffin removal effect on the inner cavities of the precise sand filtering pipes is realized; and the space of the casing pipe which is 0.5 to 1.0 meter below the bottom boundary of the oil layer can be cleaned by flushing, so that the filtering sand pipe can clean the shaft.
The utility model has simple and reasonable structure, designs the integrated small oil pipe (namely, the second oil pipe) and the large oil pipe (namely, the third oil pipe), and puts the small oil pipe below the oil layer, which is equivalent to putting the inlet of the pump below the oil layer, thereby realizing the purpose of amplifying the production pressure difference to the maximum extent and digging the liquid supply capacity of the oil layer to the limit; and high-efficiency oil extraction in the oil exploitation process is realized.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that, in the design concept of the sand setting pocket in embodiment 1, when the second oil pipe with the diameter of 48.3mm is partially or completely broken due to corrosion or abrasion in the production process, the problem of difficulty in operation salvage is solved.
The design idea of this embodiment to the sand setting pocket is as follows:
the lower part of the second oil pipe is designed to extend into the third oil pipe, and the bottom of the second oil pipe extends out of the third oil pipe; a leather cup packer 15 is reversely arranged at the bottom of the sand filtering pipe with a bowl opening facing upwards; and a closed sand setting annular space is formed between the leather cup packer 15 and the releasing packer and is used as a sand setting pocket. Specifically, the lower part of the second oil pipe extends into an oil pipe short joint inner cavity below a bottom boundary of a filtering seam in the sand filtering pipe inner cavity, penetrates through the sand filtering pipe inner cavity, extends out of the oil pipe short joint, and extends for a distance of 0.5-1.0m beyond the bottom boundary of the oil layer.
This design is at accurate sand screen bottom portion bowl mouth reverse packing a leather cup packer 15 up, and its effect has two points: firstly, the system device is formed together with a releasing packer at the upper part of a precise sand filtering pipe, the upper annular space and the lower annular space of an oil layer which are right opposite to the precise sand filtering pipe are sealed, so that liquid from a stratum can only enter an annular space which is formed by a central pipe of the precise sand filtering pipe and a second oil pipe which is connected below a pump and has the outer diameter of 48 millimeters, then flows downwards, enters an opening at the bottom of the second oil pipe with the diameter of 48 millimeters, and then flows upwards and rapidly to enter the pump; and secondly, the sand setting annular space is used as a sand prevention tool, and sand from the stratum is contained in the sand setting annular space and is filled to form a sand blocking ring.
Meanwhile, the design avoids the problem of difficult operation salvage caused by corrosion or partial or complete breakage of the phi 48.3mm second oil pipe due to abrasion in the production process, because enough space of a sleeve sand setting pocket is provided, the phi 48.3mm second oil pipe can be completely contained by the space of the sleeve pocket below the sand filtering pipe, the fish top of the second oil pipe is lower than the bottom boundary of an oil layer, and therefore the second oil pipe cannot be blocked in the inner cavity of the sand filtering pipe at the oil layer part to influence formation liquid supply after pump inspection, more importantly, a special salvage tool is not required to be immediately equipped to salvage the phi 48.3mm second oil pipe falling into an artificial well bottom, and if the sand filtering pipe which needs to be fished out after pump inspection is not influenced by the dropping of the phi 48.3mm second oil pipe. The fishing operation can be normally executed. The function solves the difficult problem of how to avoid fishing after the second oil pipe with the small diameter is broken and falls into the well as the speed pipe, and can normally execute fishing operation.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. An integrated self-filling sand-prevention and wax-prevention oil forced extraction tool comprises an oil pipe string arranged in an oil well casing, a first oil pipe and a pump, wherein the pump extends into the first oil pipe, and extracted oil is discharged to the oil pipe string; the oil-water separator is characterized by further comprising a second oil pipe, a third oil pipe and a sand filter pipe which are arranged in the oil well casing, wherein the first oil pipe is downwards connected with the second oil pipe, the lower part of the second oil pipe extends into the third oil pipe, the bottom of the third oil pipe extends to an oil layer, the sand filter pipe is wound on the outer wall of the third oil pipe part in the oil layer, perforations are arranged on the outer wall of the third oil pipe part in the oil layer, oil enters the second oil pipe from the perforations, and the extracted oil is discharged to an oil pipe string by the pump; the outer diameter of the second oil pipe is smaller than the inner diameter of the third oil pipe.
2. The integrated self-filling sand and wax control oil well drilling tool according to claim 1, further comprising a sleeved nylon oil pipe centralizer, wherein the sleeved nylon oil pipe centralizer is arranged at the bottom of the first oil pipe; and a centralizer is arranged at the bottom of the sand filtering pipe.
3. The integrated self-filling sand-and wax-control oil forced-production tool according to claim 1, further comprising an oil pipe thread-changing joint, wherein the bottom of the first oil pipe is connected with a second oil pipe through the oil pipe thread-changing joint;
and the oil pipe buckle changing joint and the second oil pipe form a liquid inlet channel which is immediately arranged below the pump.
4. The integrated self-filling sand-and wax-control oil well-drilling tool of claim 1, further comprising a release packer, wherein the release packer is arranged on the top of the third oil pipe, the third oil pipe passes through the release packer downwards, and the release packer is externally connected with a release service tool as a pressure test tool for the oil pipe before setting.
5. The integrated self-filling sand and wax control oil well-drilling tool as claimed in claim 1, wherein the first oil pipe has an outer diameter of 73mm and an inner diameter of 62 mm;
the outer diameter of the second oil pipe is 48.3mm, and the inner diameter of the second oil pipe is 35.6 mm;
the outer diameter of the third oil pipe is 73mm, and the inner diameter of the third oil pipe is 62 mm;
the first oil pipe is a 2-3/8in flat oil pipe, and the second oil pipe is a 1.9in oil pipe.
6. The integrated self-filling sand and wax control oil well-drilling tool as claimed in claim 5, wherein the length of the second oil pipe is 17 m; the length of the third oil pipe is 9.5 m.
7. The integrated self-filling sand and wax control oil forced extraction tool according to claim 1, further comprising a tail pipe and a plug, wherein the bottom of the third oil pipe is provided with the tail pipe and the plug in sequence, and the tail pipe and the plug are used as a sand setting pocket.
8. The integrated self-filling sand and wax control oil well-drilling tool according to claim 1, wherein the lower part of the second oil pipe extends into the third oil pipe and the bottom of the second oil pipe extends out of the third oil pipe; a leather cup packer is reversely arranged at the bottom of the sand filtering pipe with a bowl opening facing upwards;
and a closed sand setting annular space is formed between the leather cup packer and the releasing packer and is used as a sand setting pocket.
9. The integrated self-filling sand and wax control oil well drilling tool according to claim 8, wherein the lower part of the second oil pipe extends into the inner cavity of the oil pipe short joint below the bottom boundary of the filtering seam in the inner cavity of the sand filtering pipe, passes through the inner cavity of the sand filtering pipe, extends out of the oil pipe short joint, and extends out by a distance of 0.5-1.0m beyond the bottom boundary of the oil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123347710.6U CN216477279U (en) | 2021-12-28 | 2021-12-28 | Integrated self-filling sand-proof paraffin-proof oil forced extraction tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123347710.6U CN216477279U (en) | 2021-12-28 | 2021-12-28 | Integrated self-filling sand-proof paraffin-proof oil forced extraction tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216477279U true CN216477279U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123347710.6U Active CN216477279U (en) | 2021-12-28 | 2021-12-28 | Integrated self-filling sand-proof paraffin-proof oil forced extraction tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216477279U (en) |
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2021
- 2021-12-28 CN CN202123347710.6U patent/CN216477279U/en active Active
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