CN116816308A - Oil-free pipe paraffin removal lifting device for small-bore shale oil well - Google Patents
Oil-free pipe paraffin removal lifting device for small-bore shale oil well Download PDFInfo
- Publication number
- CN116816308A CN116816308A CN202311047850.2A CN202311047850A CN116816308A CN 116816308 A CN116816308 A CN 116816308A CN 202311047850 A CN202311047850 A CN 202311047850A CN 116816308 A CN116816308 A CN 116816308A
- Authority
- CN
- China
- Prior art keywords
- pipe
- well
- oil
- valve
- hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000012188 paraffin wax Substances 0.000 title claims abstract description 34
- 239000003079 shale oil Substances 0.000 title claims abstract description 29
- 238000011010 flushing procedure Methods 0.000 claims abstract description 31
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000010008 shearing Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 26
- 238000005086 pumping Methods 0.000 description 10
- 238000004140 cleaning Methods 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 3
- 244000273618 Sphenoclea zeylanica Species 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
The invention discloses a small-bore shale oil well oil-free pipe paraffin removal lifting device, which comprises a tail pipe, wherein a plug is arranged at the lower part of the tail pipe, a screen pipe is arranged at the upper part of the tail pipe, a fixed valve is arranged on the screen pipe, a packer is arranged at the upper part of the fixed valve, a tubular pump cylinder is arranged at the upper part of the packer, a tubular pump plunger is arranged at the upper part of the tubular pump cylinder, a releasing tool is arranged at the upper part of the tubular pump plunger, a steel solid sucker rod is arranged at the upper part of the releasing tool, a hollow rod well flushing valve is arranged at the upper part of the steel solid sucker rod, and a hollow sucker rod is arranged at the upper part of the hollow rod well flushing valve, wherein the plug, the tail pipe, the fixed valve, the packer, the tubular pump cylinder and the releasing tool form a releasing pump system. According to the paraffin removal and lifting device for the small-bore shale oil well without the oil pipe, lifting without lowering an oil production string is achieved in the small-bore casing through the releasing pump system, and the problem that an effective lifting process does not exist in the small-bore casing at present is solved.
Description
Technical Field
The invention relates to an oil well tool, in particular to a paraffin removal lifting device for a small-bore shale oil well oil-free pipe.
Background
At present, the development of shale oil in China is in a rapid rising situation, but the development cost of shale oil wells is high, and in order to save the drilling cost, a well completion mode of deepening a sidetrack of an old well is adopted for part of oil fields, so that a sidetrack small well completion production casing is formed. Because of the large-scale fracturing effect, the shale oil well fracturing production is carried out by self-injection while the initial stage of production maintains higher energy, but the shale oil well energy is reduced, the pressure is reduced, the liquid amount is reduced along with the continuous deep development stage, and the later stage of the production inevitably goes through the development process of pumping production.
At present, as the small-size production casing with the diameter of phi 88.9 mm-phi 101.6mm is adopted in the completion of the sidetrack shale oil well, the inner diameter of the production casing is only 76-88 mm, the conventional oil production pipe column coupling with the diameter of phi 73.03mm is 89-93 mm, and the production casing cannot be put in. While a small-size oil production pipe column matched with an oil pipe with the diameter of phi 60.33mm and a sucker rod with the diameter of phi 16mm can adapt to the size of the sleeve to form the small-size oil production pipe column, the maximum lower depth of the small-size oil production pipe column is severely limited due to the limitation of the tensile strength of the small-size sucker rod, and the well depth of a shale oil well is 3500-5000m at most, so that the small-size oil production pipe column has serious adaptability.
Disclosure of Invention
Based on the above, it is necessary to provide a paraffin removal lifting device for oil-free pipe of small-bore shale oil well.
In order to solve the technical problems, the invention adopts the following technical scheme:
the paraffin removal lifting device for the oil-free pipe of the small-bore shale oil well is characterized by comprising a tail pipe, wherein the lower part of the tail pipe is provided with a plug, the upper part of the tail pipe is provided with a screen pipe, a fixed valve is arranged on the screen pipe, a packer is arranged on the upper part of the fixed valve, a tubular pump cylinder is arranged on the upper part of the packer, a tubular pump plunger is arranged on the upper part of the tubular pump cylinder, a releasing tool is arranged on the upper part of the tubular pump plunger, a steel solid sucker rod is arranged on the upper part of the releasing tool, a hollow rod well washing valve is arranged on the upper part of the steel solid sucker rod, a hollow rod is arranged on the upper part of the hollow rod well washing valve,
wherein,,
the plug, the tail pipe, the fixed valve, the packer, the tubular pump cylinder and the releasing tool form a releasing pump system,
the tubular pump plunger, the steel solid sucker rod, the hollow rod well flushing valve and the hollow sucker rod form a sucker rod system.
As a preferred embodiment of the invention, a fixed valve seat and a fixed valve ball are arranged in the fixed valve, and the fixed valve seat and the fixed valve ball form a unidirectional flow structure.
As a preferred embodiment of the invention, the hollow rod well flushing valve is a reverse check valve.
As a preferred embodiment of the invention, the releasing tool comprises an upper joint and a lower joint, a solid steel ball, a sliding sleeve and a locking block are arranged between the upper joint and the lower joint, a sealing rubber ring is arranged on the outer wall of the sliding sleeve and tightly abuts against the inner wall of the upper joint, a shearing pin is arranged on the side wall of the upper joint, and the shearing pin is jacked into the outer wall of the sliding sleeve.
As a preferred embodiment of the invention, one end of the hollow rod well-flushing valve is provided with a sucker rod male buckle, the other end of the hollow rod well-flushing valve is provided with a hollow sucker rod male buckle, the interior of the hollow rod well-flushing valve is provided with a sealing assembly and a spring, and the outer wall of the hollow rod well-flushing valve is provided with a liquid outlet hole.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides an oil pipe-free paraffin removal lifting device for a small-bore shale oil well. The small-bore casing is used for replacing the conventional production oil pipe, so that the problem of limited pumping depth caused by the small-size oil pipe and the sucker rod is solved, the pumping depth in the small-bore is greatly improved, and the problem that no effective lifting process exists in the small-bore casing at present is solved. In addition, the paraffin removal lifting device for the oil-free pipe of the slim-hole shale oil well can realize a circulating well-cleaning function by utilizing the hollow rod well-cleaning valve, and meanwhile, the efficient paraffin removal function is realized by pumping paraffin removal and paraffin control agent well-cleaning liquid in the hollow rod. In order to prevent crude oil from entering the hollow rod, a strong closed type single-flow device is arranged to ensure that the well is in a closed state when the well is not washed.
Drawings
In order to more clearly illustrate the solution of the present invention, a brief description will be given below of the drawings required for the description of the embodiments, it being obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a small bore shale oil well oil-free pipe paraffin removal lifting apparatus of the present invention;
FIG. 2 is a schematic illustration of the packer construction of the slim hole shale oil well oil free pipe paraffin removal lift apparatus of FIG. 1;
FIG. 3 is a schematic structural view of a release tool of the small bore shale oil well oil free pipe paraffin removal lifting apparatus of FIG. 1, showing a state of the release tool prior to release;
FIG. 4 is a schematic structural view of a release tool of the small bore shale oil well oil pipe free paraffin removal lifting apparatus of FIG. 1, showing the release tool in a released state;
FIG. 5 is a schematic structural view of a hollow stem flushing valve of the slim hole shale oil well oil free pipe paraffin removal lifting apparatus of FIG. 1;
the labels in the figures are illustrated below: 11. plugging; 110. a hollow rod well flushing valve; 111. a hollow sucker rod; 12. a tail pipe; 13. a screen pipe; 14. fixing a valve; 141. fixing a valve seat; 142. fixing a valve ball; 15. a packer; 16. a tubular pump cylinder; 17. a tubular pump plunger; 18. releasing the tool; 19. steel solid sucker rod; 31. an upper joint; 32. solid steel balls; 33. sealing rubber rings; 34. shearing pins; 35. a sliding sleeve; 36. a locking piece; 37. a lower joint; 51. a sucker rod pin thread; 52. a liquid outlet hole; 53. a spring; 54. a sealing assembly; 55. hollow sucker rod pin.
Description of the embodiments
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present invention.
As shown in fig. 1 to 5, the paraffin removal and lifting device for the small-bore shale oil well without oil pipe comprises a tail pipe 12, a plug 11 is arranged at the lower part of the tail pipe 12, a screen pipe 13 is arranged at the upper part of the tail pipe 12, a fixed valve 14 is arranged on the screen pipe 13, a packer 15 is arranged at the upper part of the fixed valve 14, a tubular pump cylinder 16 is arranged at the upper part of the packer 15, a tubular pump plunger 17 is arranged at the upper part of the tubular pump cylinder 16, a releasing tool 18 is arranged at the upper part of the tubular pump plunger 17, a steel solid sucker rod 19 is arranged at the upper part of the releasing tool 18, a hollow rod well flushing valve 110 is arranged at the upper part of the steel solid sucker rod 19, and a hollow sucker rod 111 is arranged at the upper part of the hollow rod well flushing valve 110.
The plug 11, the tail pipe 12, the fixed valve 14, the packer 15, the tubular pump cylinder 16 and the releasing tool 18 form a releasing pump system.
The tubular pump plunger 17, steel solid sucker rod 19, hollow rod well-flushing valve 110 and hollow sucker rod 111 form a sucker rod system.
It should be noted that, a fixed valve seat 141 and a fixed valve ball 142 are disposed in the fixed valve 14, and the fixed valve seat 141 and the fixed valve ball 142 form a unidirectional flow structure. The forward pressure of the tubing can raise the pressure inside the tubing and set the packer 15.
The hollow rod well cleanout valve 110 is a reverse uniflow valve having a communication port between the interior of the hollow sucker rod 111 and the production casing. The function of unidirectional circulation of the hollow sucker rod 111 to the production casing space is realized by using a forced closed reverse uniflow device designed by a spring. When no circulation well cleanout is performed, the hollow stem well cleanout valve 110 is in a forced closed state.
As shown in fig. 3, the releasing tool 18 comprises an upper joint 31 and a lower joint 37, a solid steel ball 32, a sliding sleeve 35 and a locking piece 36 are arranged between the upper joint 31 and the lower joint 37, a sealing rubber ring 33 is arranged on the outer wall of the sliding sleeve 35, the sealing rubber ring 33 tightly abuts against the inner wall of the upper joint 31, a shearing pin 34 is arranged on the side wall of the upper joint 31, and the shearing pin 34 is propped against the outer wall of the sliding sleeve 35.
As shown in fig. 5, one end of the hollow rod well-flushing valve 110 is provided with a sucker rod male buckle 51, the other end of the hollow rod well-flushing valve 110 is provided with a hollow sucker rod male buckle 55, a sealing assembly 54 and a spring 53 are arranged in the hollow rod well-flushing valve 110, and a liquid outlet hole 52 is arranged on the outer wall of the hollow rod well-flushing valve 110.
The well casing specification corresponding to the lifting device is an oil layer production casing with the outer diameter of 88.9 mm-101.6 mm and the inner diameter of 76-88 mm.
The specific model of the packer 15 is Y441, which is a compression packer for pressing and setting, and different outer diameters can be designed to be 70-82 mm according to different casing sizes. The middle of the packer 15 is provided with a through hole, so that the communication between the lower casing space of the packer and the upper tubular pump cylinder of the packer can be realized, the casing annulus is sealed after setting, the tubular pump cylinder 16 is connected, and the screen pipe 13 and the tail pipe 12 are suspended at the lower part.
The releasing tool 18 can be designed to have different outer diameters of 70-82 mm according to different casing sizes, is connected to the upper part of the pump cylinder 16 of the tubular pump, enters a well along with an oil pipe and is delivered to a preset position, and after the preset position is reached, the ball is thrown into the oil pipe to separate the upper joint part from the lower joint part of the releasing tool and release the oil.
The operation of the small bore shale well non-tubing paraffin removal lift apparatus is described below.
The plug 11, the tail pipe 12, the screen pipe 13, the fixed valve 14, the packer 15, the tubular pump cylinder 16 and the releasing tool 18 are sequentially connected through threads from bottom to top to form a releasing pump system. The pumping rod system consists of a tubular pump plunger 17, a steel solid pumping rod 19, a hollow rod well flushing valve 110 and a hollow pumping rod 111 which are sequentially connected by threads from bottom to top. The lengths and the proportions of the steel solid sucker rod 19 and the hollow sucker rod 111 can be adjusted according to the oil quality condition of the shale oil well of the small well bore and the paraffin precipitation characteristic.
The sucker rod system delivers a lost motion pump system to the wellbore.
The upper portion of the lost motion pump system was connected to a phi 60mm delivery tubing via a 27/8 "TBG. After the lost motion pump system is lowered with the tubing to the designed well depth, the tubing is pressing the set packer 15. And then delivering a solid steel ball 32 with the diameter of 35mm in the oil pipe with the diameter of 60mm, continuing to positively press the oil pipe to cut off the shear pin 34 after the solid steel ball 32 falls into the releasing tool 18, enabling the sliding sleeve 35 to descend, releasing the locking block 36, and separating the upper joint 31 from the lower joint 37 of the releasing tool 18 to finish releasing. After release, the upper sub 31 with the 60mm tubing lifts the cast solid steel ball 32 out of the wellbore, leaving the lower sub 37 with the tubular pump barrel 16 and lower tools in the wellbore.
When the tubing pump plunger 17 enters the tubing pump barrel 16, a downhole pump system is formed by the up and down movement of the tubing pump plunger 17.
In addition, when the hollow sucker rod 111 is positively pressurized, the pressure in the hollow sucker rod 111 is increased to the opening pressure of the hollow rod well flushing valve 110, so that the hollow rod positive circulation well flushing and paraffin removal operation can be realized, and a paraffin removal and paraffin control agent well flushing liquid can be prepared in the well flushing liquid for improving the paraffin removal efficiency.
The paraffin removal and lifting device for the small-bore shale oil well without the oil pipe realizes lifting without lowering an oil production string in the small-bore casing through the release pump system. The small-bore casing is used for replacing the conventional production oil pipe, so that the problem of limited pumping depth caused by the small-size oil pipe and the sucker rod is solved, the pumping depth in the small-bore is greatly improved, and the problem that no effective lifting process exists in the small-bore casing at present is solved. In addition, the paraffin removal lifting device for the oil-free pipe of the slim-hole shale oil well can realize a circulating well-cleaning function by utilizing the hollow rod well-cleaning valve, and meanwhile, the efficient paraffin removal function is realized by pumping paraffin removal and paraffin control agent well-cleaning liquid in the hollow rod. In order to prevent crude oil from entering the hollow rod, a strong closed type single-flow device is arranged to ensure that the well is in a closed state when the well is not washed.
Without being limited thereto, any changes or substitutions that are not contemplated by the inventors are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope defined by the claims.
Claims (5)
1. The paraffin removal lifting device for the oil-free pipe of the slim-hole shale oil well is characterized by comprising a tail pipe (12), wherein a plug (11) is arranged at the lower part of the tail pipe (12), a screen pipe (13) is arranged at the upper part of the tail pipe (12), a fixed valve (14) is arranged on the screen pipe (13), a packer (15) is arranged at the upper part of the fixed valve (14), a pipe pump cylinder (16) is arranged at the upper part of the packer (15), a pipe pump plunger (17) is arranged at the upper part of the pipe pump cylinder (16), a releasing tool (18) is arranged at the upper part of the pipe pump plunger (17), a steel solid sucker rod (19) is arranged at the upper part of the releasing tool (18), a hollow rod flushing valve (110) is arranged at the upper part of the steel solid sucker rod (19), a hollow rod flushing valve (111) is arranged at the upper part of the hollow rod flushing valve (110),
wherein,,
the plug (11), the tail pipe (12), the fixed valve (14), the packer (15), the tubular pump cylinder (16) and the releasing tool (18) form a releasing pump system,
the tubular pump plunger (17), the steel solid sucker rod (19), the hollow rod well flushing valve (110) and the hollow sucker rod (111) form a sucker rod system.
2. The oil-free pipe paraffin removal lifting device for the slim hole shale oil well as claimed in claim 1, wherein a fixed valve seat (141) and a fixed valve ball (142) are arranged in the fixed valve (14), and the fixed valve seat (141) and the fixed valve ball (142) form a unidirectional flow structure.
3. The oil-free pipe paraffin removal lift device of a slim hole shale oil well of claim 1, wherein said hollow rod flushing valve (110) is a reverse uniflow valve.
4. The oil-free pipe paraffin removal lifting device for a small-bore shale oil well according to claim 1, wherein the releasing tool (18) comprises an upper connector (31) and a lower connector (37), a solid steel ball (32), a sliding sleeve (35) and a locking block (36) are arranged between the upper connector (31) and the lower connector (37), a sealing rubber ring (33) is arranged on the outer wall of the sliding sleeve (35), the sealing rubber ring (33) tightly abuts against the inner wall of the upper connector (31), a shearing pin (34) is arranged on the side wall of the upper connector (31), and the shearing pin (34) is jacked into the outer wall of the sliding sleeve (35).
5. The paraffin removal lifting device for the oil-free pipe of the slim hole shale oil well according to claim 1, wherein one end of the hollow rod well flushing valve (110) is provided with a sucker rod male buckle (51), the other end of the hollow rod well flushing valve (110) is provided with a hollow sucker rod male buckle (55), a sealing assembly (54) and a spring (53) are arranged in the hollow rod well flushing valve (110), and a liquid outlet hole (52) is formed in the outer wall of the hollow rod well flushing valve (110).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311047850.2A CN116816308A (en) | 2023-08-21 | 2023-08-21 | Oil-free pipe paraffin removal lifting device for small-bore shale oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311047850.2A CN116816308A (en) | 2023-08-21 | 2023-08-21 | Oil-free pipe paraffin removal lifting device for small-bore shale oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116816308A true CN116816308A (en) | 2023-09-29 |
Family
ID=88143286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311047850.2A Pending CN116816308A (en) | 2023-08-21 | 2023-08-21 | Oil-free pipe paraffin removal lifting device for small-bore shale oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116816308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365382A (en) * | 2023-12-08 | 2024-01-09 | 大庆汇景石油机械有限公司 | Wax-proof heating and heat-preserving device for oil pipe under oil field well |
-
2023
- 2023-08-21 CN CN202311047850.2A patent/CN116816308A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117365382A (en) * | 2023-12-08 | 2024-01-09 | 大庆汇景石油机械有限公司 | Wax-proof heating and heat-preserving device for oil pipe under oil field well |
| CN117365382B (en) * | 2023-12-08 | 2024-02-09 | 大庆汇景石油机械有限公司 | Wax-proof heating and heat-preserving device for oil pipe under oil field well |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204252973U (en) | Split type downhole choke ware | |
| CN108625830B (en) | Ball throwing type layering sand prevention process pipe column and method thereof | |
| CN211549659U (en) | Long-life water injection string of offshore oil field | |
| CN112523734A (en) | Oil pipe dragging fracturing string with packer as bottom seal and fracturing method | |
| CN116335579A (en) | Oil field well casing packer and non-cementing injection self-plugging staged fracturing method | |
| CN116816308A (en) | Oil-free pipe paraffin removal lifting device for small-bore shale oil well | |
| CN107939347B (en) | Single-flow oil drainage process pipe column | |
| CN110847846B (en) | Packer for oil field exploitation | |
| CN116411868A (en) | A slim hole plug-free cementing device, rubber plug and its cementing construction method | |
| CN203420698U (en) | Open hole horizontal well completion fracturing integrated pipe column | |
| CN115538975B (en) | Leakage plugging and oil production device for multi-point water-outlet oil well and leak plugging and oil production method | |
| CN214944177U (en) | CO (carbon monoxide)2Oil well driving non-killing oil production pipe column | |
| CN113738314B (en) | Integrated pump-suction combined operation pressurized rotary pump pipe column and plugging tool and method | |
| CN117287171A (en) | Fracturing sand control production integrated tubular column structure | |
| CN212428730U (en) | Shaft float switch | |
| CN110566450B (en) | Hydraulic control blowout prevention device for oil pipe under pump | |
| CN116104452A (en) | Horizontal well two-stage relay plunger lifting device and its method and movable spherical core plunger | |
| CN210598927U (en) | Special downhole hydraulic motor for oil production | |
| CN114810021A (en) | Gas well full life cycle coiled tubing completion pipe string and process method thereof | |
| CN218716699U (en) | Side drilling well fluid lifting device and locking device in well thereof | |
| CN111058792A (en) | Coiled tubing perforation-free under-pressure operation-free well completion device and method | |
| CN111021999B (en) | Liquid drainage and gas production integrated pipe column | |
| CN218177197U (en) | Can salvage and exempt from to bore cementing well device | |
| CN2844421Y (en) | Special block packer for horizontal well | |
| CN112709555A (en) | Efficient separate-prevention separate-injection tubular column for water injection well and construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |