CN111287692A - Quick rotary pumping device after oil well fracturing - Google Patents
Quick rotary pumping device after oil well fracturing Download PDFInfo
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- CN111287692A CN111287692A CN202010282761.6A CN202010282761A CN111287692A CN 111287692 A CN111287692 A CN 111287692A CN 202010282761 A CN202010282761 A CN 202010282761A CN 111287692 A CN111287692 A CN 111287692A
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- Prior art keywords
- groove
- locking
- pumping device
- oil well
- post
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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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
- E21B34/10—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole
- E21B34/102—Valve arrangements for boreholes or wells in wells operated by control fluid supplied from outside the borehole with means for locking the closing element in open or closed position
Abstract
The invention discloses a quick rotary pumping device after oil well fracturing, and particularly relates to the field of oil wells. According to the invention, the locking device of the rapid rotary pumping device is formed by arranging the locking pin and the graphite column and utilizing the interference fit between the thermal expansion of the locking pin and the locking groove, when the self-injection type conversion operation into the pumping operation is required, the locking pin is temporarily contracted in the cold environment and the friction of the locking groove is reduced by high-density saline water injected into the circulating kill chamber to realize unlocking, and the secondary unlocking mechanism consisting of the graphite column is matched, so that the influence of the external environment is reduced, and the stability of the rotary pumping device is improved.
Description
Technical Field
The invention relates to the technical field of oil wells, in particular to a rapid rotary pumping device after oil well fracturing.
Background
With the rapid development of the petroleum industry technology, in the petroleum well repairing operation in China, after oil well fracturing, the working system is gradually changed from a self-injection type to a pumping type, but the liquid output of a well head is still large, and the speed of a rotating shaft is slow.
The existing technology is to put down the well mouth first, when the well mouth does not produce liquid, control the well shaft to produce liquid and then finish the well pipe and the pole column, or use the high density brine circulation kill-job mode to control the well shaft to produce liquid and then finish the well pipe and the pole column, thus achieve the purpose of changing the working system, however, because can't stop the well shaft to produce liquid completely after the brine circulation kill-job, only reduce the liquid output amount, along with the duration of the operation time, the liquid column pressure in the well presents the descending trend, when the bottom hole pressure is greater than the liquid column pressure, the liquid output amount of the well mouth will increase continuously, well control dangerous situations such as well kick, etc. are apt to happen, the personnel of the well mouth operates the danger to increase in this situation at the same time; because the whole process is in a liquid outlet state, oily sewage at a well mouth and around is continuously gathered and overflows, and the operation site environment is easily seriously polluted; meanwhile, the time for releasing pressure to the outlet without discharging liquid is too long, the working procedures are required to be added for brine well killing, and the optimal pumping time window is easily missed, so that the output rate and the efficiency of the oil well are reduced.
In order to solve the problems, the patent of the patent application publication number CN208718618U discloses a device for quickly pumping oil after fracturing of an oil well, referring to the attached drawing 5 of the specification, in the application, through the fracture of a fixing pin, a mandril 2 and a baffle plate are separated from a valve cylinder 1 simultaneously and fall into a tail pipe, and under the conditions of safety and no pollution, the working system of the oil well after fracturing is changed quickly, so that the technical effects of improving the working efficiency and the oil outlet quality of the oil well are achieved.
However, the above technical solutions still have many disadvantages in practical use: because the rotary pumping device realizes quick rotary pumping in a mode that the fixing pin is broken and the baffle is simultaneously separated from the valve cylinder and falls into the tail pipe, in order to ensure that the fixing pin can realize quick breakage, the structural property of the rotary pumping device is generally fragile, the fixing pin is easy to generate the phenomenon of thermal expansion under the high-temperature environment in the shaft bottom in the practical use, and the condition that the fixing pin is broken is easily caused due to the difference of the expansion coefficient of a connecting hole on the valve cylinder, so that the rotary pumping device is not stable enough, in addition, the fixing pin and the baffle can both fall off, the fixing pin and the baffle need to be synchronously replaced when the device is used for the second time, the baffle is arranged in a tiny valve cylinder, the cost is high;
therefore, it is desirable to provide a post-fracturing rapid pumping device for an oil well, which has a stable structure and can be reused.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a quick rotary pumping device after oil well fracturing, a locking device of the quick rotary pumping device is formed by arranging a locking pin and a graphite column and utilizing interference fit between thermal expansion of the locking pin and a locking groove, when self-injection type switching is required to pumping operation, high-density saline water injected by circulating kill wells enables the locking pin to temporarily contract in a cold environment and reduce friction of the locking groove to realize unlocking, and a secondary unlocking mechanism consisting of the graphite column is matched to reduce the influence of the external environment and improve the stability of the rotary pumping device; in addition, secondary unlocking is realized through breakage of the graphite column, the expansion coefficient of the graphite column is small, the graphite column is not easily influenced by temperature, locking can be stably realized, the graphite column can be used for the second time through replacing a new graphite column after the rotary pumping is finished, only the graphite column needs to be fixedly arranged in a connecting groove of the ejector rod, accurate fit with a pin hole of the valve cylinder is not needed, the installation is simple and convenient, the graphite column can be used for multiple times, the equipment maintenance cost is reduced, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a device is taken out in commentaries on classics fast behind oil well fracturing, includes valve section of thick bamboo, ejector pin, valve ball, the ejector pin is located the inside of valve section of thick bamboo and with the inner wall sliding connection of valve section of thick bamboo, valve ball fixed mounting is in the tip of ejector pin, first ladder groove, second ladder groove, locking groove have been seted up to the inner wall of valve section of thick bamboo, the second ladder groove is equipped with disconnected sword with the junction in first ladder groove, the locking groove is located the surface in second ladder groove and is close to the port of valve section of thick bamboo, first connecting groove, second connecting groove have been seted up on the surface of ejector pin, the bottom surface of first connecting groove, second connecting groove fixed mounting respectively has graphite column, locking round pin, the bottom of graphite column, locking round pin respectively with the mutual butt in the surface of first ladder groove, locking groove.
In a preferred embodiment, the locking groove, the second step groove and the first step groove are arranged in sequence from left to right, the first step groove and the second step groove are in a stepped structure, and the surfaces of the first step groove and the second step groove are in a smooth surface structure.
In a preferred embodiment, the locking pin is a metal member, and the locking pin is one of a zinc block and an aluminum block.
In a preferred embodiment, one side of the graphite column is provided with a notch, the notch and the breaking knife are located at the same height, and the notch is located on the outer side of the opposite surface of the graphite column and the breaking knife.
In a preferred embodiment, the second connecting groove and the locking groove are positioned on the same straight line and are parallel to each other, and the bottom end of the locking pin is in interference fit with the second connecting groove and the locking groove.
In a preferred embodiment, the graphite pillar has a cylindrical structure, and the bottom surface of the graphite pillar is slidably connected with the surface of the first ladder groove.
In a preferred embodiment, the surface of the locking groove is a rough surface structure, and the bottom surface is provided with an anti-slip groove.
The invention has the technical effects and advantages that:
1. according to the rapid rotary pumping device, the locking device of the rapid rotary pumping device is formed by arranging the locking pin and the graphite column and utilizing interference fit between the thermal expansion of the locking pin and the locking groove, when the self-injection type conversion operation into the pumping operation is required, the locking pin is temporarily contracted when being cooled and the friction of the locking groove is reduced by high-density saline water injected into the circulating kill chamber, so that unlocking is realized, and the secondary unlocking mechanism consisting of the graphite column is matched, so that the influence of the external environment is reduced, and the stability of the rotary pumping device is improved;
2. according to the valve cylinder, secondary unlocking is realized through breakage of the graphite column, the expansion coefficient of the graphite material is small, the graphite column is not easily influenced by temperature, locking can be stably realized, the graphite column can be used for the second time through replacing a new graphite column after the rotary pumping is completed, the graphite column is only required to be fixedly arranged in the connecting groove of the ejector rod, accurate fit with the pin hole of the valve cylinder is not required, the installation is simple and convenient, the valve cylinder can be used for multiple times, and the maintenance cost of equipment is reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a structural diagram of the use state of the present invention.
FIG. 3 is a schematic view of the structure at A in FIG. 1 according to the present invention.
Fig. 4 is a schematic view of the locking pin structure of the present invention.
FIG. 5 is a diagram illustrating a structure of a comparison file according to the present invention.
The reference signs are: 1. a valve barrel; 2. a top rod; 3. a graphite column; 4. a locking pin; 5. a Versailles ball; 11. a first ladder groove; 12. a second ladder groove; 121. cutting; 13. a locking groove; 21. a first connecting groove; 22. a second connecting groove; 31. and (4) a notch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The device comprises a valve barrel 1, a push rod 2 and a valve ball 5, wherein the push rod 2 is positioned inside the valve barrel 1 and is in sliding connection with the inner wall of the valve barrel 1, the valve ball 5 is fixedly arranged at the end part of the push rod 2, a first ladder groove 11, a second ladder groove 12 and a locking groove 13 are formed in the inner wall of the valve barrel 1, a breaking knife 121 is arranged at the joint of the second ladder groove 12 and the first ladder groove 11, the locking groove 13 is positioned on the surface of the second ladder groove 12 and is close to a port of the valve barrel 1, a first connecting groove 21 and a second connecting groove 22 are formed in the surface of the push rod 2, a graphite column 3 and a locking pin 4 are fixedly arranged on the bottom surfaces of the first connecting groove 21 and the second connecting groove 22 respectively, and the bottom ends of the graphite column 3 and the locking pin 4 are abutted to the surfaces of the first ladder groove 11 and the locking groove 13 respectively.
The implementation mode is specifically as follows: by arranging the locking pin 4 and the graphite column 3, the locking device of the rapid rotary pumping device is formed by utilizing the interference fit between the thermal expansion of the locking pin 4 and the locking groove 13, when the self-injection type switching operation is required to be performed to the pumping operation, the locking pin 4 is temporarily contracted when meeting cold and the friction of the locking groove 13 is reduced by high-density saline water injected by the circulating kill pit to realize unlocking, and the secondary unlocking mechanism consisting of the graphite column 3 is matched, so that the influence of the external environment is reduced, and the stability of the rotary pumping device is improved; in addition, secondary unlocking is realized through breakage of the graphite column 3, the expansion coefficient of the graphite material is small, the graphite material is not easily influenced by temperature, locking can be stably realized, the graphite column 3 can be used for the second time through replacing a new graphite column 3 after the rotary pumping is finished, only the graphite column 3 needs to be fixedly arranged in a connecting groove of the ejector rod 2, the accurate fit with a pin hole of the valve cylinder 1 is not needed, the installation is simple and convenient, the repeated use is realized, and the equipment maintenance cost is reduced
The locking groove 13, the second step groove 12 and the first step groove 11 are sequentially arranged from left to right, the first step groove 11 and the second step groove 12 are in stepped structures, the surfaces of the first step groove 11 and the second step groove 12 are in smooth surface structures, and the locking groove 13, the second step groove 12 and the first step groove 11 are utilized to form a secondary unlocking structure of the valve barrel 1.
The locking pin 4 is a metal component, the locking pin 4 is one of a zinc block or an aluminum block, and the characteristic of high thermal expansion coefficient of the zinc block or the aluminum block is utilized to form interference fit so as to realize locking.
Wherein, a notch 31 is arranged on one side of the graphite column 3, the notch 31 and the breaking knife 121 are at the same height, the notch 31 is positioned on the outer side of the opposite surface of the graphite column 3 and the breaking knife 121, and the breaking knife 121 and the notch 31 are utilized to make the graphite column 3 easily break to form unlocking.
Wherein, second spread groove 22, locking groove 13 are located collinear and be parallel to each other, and interference fit forms locking mechanism between the bottom of lock round pin 4 and second spread groove 22, locking groove 13.
Wherein, graphite column 3 is cylindric structure, and the bottom surface of graphite column 3 and the surperficial sliding connection of first ladder groove 11 for graphite column 3 can slide and contact with disconnected sword 121 along the surface of first ladder groove 11.
Wherein, the surface of locking groove 13 is the matte structure, and anti-skidding groove has been seted up to the bottom surface of locking round pin 4, increases the frictional force between locking round pin 4 and the locking groove 13, improves locking mechanism's stability.
The working principle of the invention is as follows:
when the self-injection type oil well is required to be converted into pumping operation after the oil well is fractured, firstly, the ejector rod 2 is abutted against a valve ball 5 in a pump cylinder of the tubular pump, then the ejector rod 2 is rotated to enable the valve ball 5 to move upwards so as to ensure that oil and water in a shaft cannot enter the pump cylinder when an oil pipe moves downwards, then a plunger and a sucker rod are put down, a well completion pipe and a rod column are controlled to rush down after the shaft is discharged, or the well completion pipe and the rod column are controlled to rush down after the shaft is discharged by using a high-density saline circulating kill mode to suppress pressure in the oil pipe so as to force the pump cylinder of the tubular pump to move towards a tail pipe, high-density saline injected by the kill well enables a locking pin 4 to temporarily contract when meeting cold and reduce friction with a locking groove 13 so as to realize unlocking, the ejector rod 2 can also move towards the tail pipe, the edge of a second ladder groove 12 for moving the graphite column 3 is fractured under the action of a fracture cutter 121 so as to realize secondary unlocking, and finally, hooking the oil sleeve annulus, and carrying out hanging pumping production.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides a device is taken out to quick commentaries on classics after oil well fracturing, includes valve section of thick bamboo (1), ejector pin (2), valve ball (5), ejector pin (2) be located the inside of valve section of thick bamboo (1) and with the inner wall sliding connection of valve section of thick bamboo (1), valve ball (5) fixed mounting is in the tip of ejector pin (2), its characterized in that: first terraced groove (11), second terraced groove (12), locking groove (13) have been seted up to the inner wall of valve barrel (1), second terraced groove (12) is equipped with disconnected sword (121) with the junction of first terraced groove (11), locking groove (13) are located the surface of second terraced groove (12) and are close to the port of valve barrel (1), first connecting groove (21), second connecting groove (22) have been seted up on the surface of ejector pin (2), the bottom surface of first connecting groove (21), second connecting groove (22) fixed mounting respectively has graphite post (3), locking round pin (4), the bottom of graphite post (3), locking round pin (4) respectively with the mutual butt in surface of first terraced groove (11), locking groove (13).
2. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: locking groove (13), second ladder groove (12), first ladder groove (11) are arranged from a left side to the right side in proper order, first ladder groove (11), the ladder-shaped structure that is of second ladder groove (12), the surface in first ladder groove (11), second ladder groove (12) is plain structure.
3. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: the locking pin (4) is a metal component, and the locking pin (4) is one of a zinc block or an aluminum block.
4. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: a notch (31) is formed in one side of the graphite column (3), the notch (31) and the breaking knife (121) are located at the same height, and the notch (31) is located on the outer side of the opposite surface of the graphite column (3) and the breaking knife (121).
5. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: the second connecting groove (22) and the locking groove (13) are located on the same straight line and are parallel to each other, and the bottom end of the locking pin (4) is in interference fit with the second connecting groove (22) and the locking groove (13).
6. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: graphite post (3) are cylindric structure, the bottom surface of graphite post (3) and the surperficial sliding connection in first ladder groove (11).
7. The post-fracturing rapid rotary pumping device of an oil well according to claim 1, characterized in that: the surface of the locking groove (13) is of a rough surface structure, and the bottom surface of the locking groove (4) is provided with an anti-skidding groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282761.6A CN111287692A (en) | 2020-04-12 | 2020-04-12 | Quick rotary pumping device after oil well fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010282761.6A CN111287692A (en) | 2020-04-12 | 2020-04-12 | Quick rotary pumping device after oil well fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111287692A true CN111287692A (en) | 2020-06-16 |
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ID=71022154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010282761.6A Withdrawn CN111287692A (en) | 2020-04-12 | 2020-04-12 | Quick rotary pumping device after oil well fracturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111287692A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140090851A1 (en) * | 2007-01-25 | 2014-04-03 | Welldynamics, Inc. | Casing valves system for selective well stimulation and control |
| CN107120102A (en) * | 2017-05-26 | 2017-09-01 | 天津昱利赢石油科技有限公司 | Long stroke acid fracturing linkage discharge opeing oil well pump |
| US20180003004A1 (en) * | 2015-02-06 | 2018-01-04 | Halliburton Energy Services, Inc. | Multi-zone fracturing with full wellbore access |
| CN109138916A (en) * | 2018-10-09 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of naked eye staged fracturing pressure difference sliding sleeve |
| CN208718618U (en) * | 2018-08-29 | 2019-04-09 | 新疆华油技术服务股份有限公司 | Quickly turn picking device after wellfracturing |
-
2020
- 2020-04-12 CN CN202010282761.6A patent/CN111287692A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140090851A1 (en) * | 2007-01-25 | 2014-04-03 | Welldynamics, Inc. | Casing valves system for selective well stimulation and control |
| US20180003004A1 (en) * | 2015-02-06 | 2018-01-04 | Halliburton Energy Services, Inc. | Multi-zone fracturing with full wellbore access |
| CN107120102A (en) * | 2017-05-26 | 2017-09-01 | 天津昱利赢石油科技有限公司 | Long stroke acid fracturing linkage discharge opeing oil well pump |
| CN208718618U (en) * | 2018-08-29 | 2019-04-09 | 新疆华油技术服务股份有限公司 | Quickly turn picking device after wellfracturing |
| CN109138916A (en) * | 2018-10-09 | 2019-01-04 | 中国石油天然气集团有限公司 | A kind of naked eye staged fracturing pressure difference sliding sleeve |
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Application publication date: 20200616 |
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| WW01 | Invention patent application withdrawn after publication |