CN104018797A - Booster type electronic control hydraulic bridge plug feeding tool - Google Patents
Booster type electronic control hydraulic bridge plug feeding tool Download PDFInfo
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- CN104018797A CN104018797A CN201410219760.1A CN201410219760A CN104018797A CN 104018797 A CN104018797 A CN 104018797A CN 201410219760 A CN201410219760 A CN 201410219760A CN 104018797 A CN104018797 A CN 104018797A
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Abstract
The invention discloses a booster type electronic control hydraulic bridge plug feeding tool. The tool comprises a motor barrel, a balance barrel, a hydraulic boosting system and a working cylinder, wherein the motor barrel, the balance barrel, the hydraulic boosting system and the working cylinder are sequentially connected from top to bottom. A motor is arranged in the motor barrel, an oil storage chamber and an oil pump are arranged in the balance barrel, and the oil pump and an output shaft of the motor are in drive connection. The hydraulic boosting system is used for increasing output pressure of the small-power oil pump to pressure required by setting of a bridge plug. The working cylinder acts on the bridge plug through a bridge plug connecting assembly, and setting is achieved. The working process is safe and reliable, the pressure of the working cylinder can quickly reach 50 MPa, the requirements for bridge plug installation setting force are quickly met, operation time is shot, and working efficiency is high. The tool can be pulled out of a well mouth along with an oil pipe after setting of the bridge plug, the hydraulic boosting system is controlled to reset and then can be reused, the service life is long, and maintenance work is simple. The working process of the hydraulic system is controllable, the magnitude of loads and the loading speed can be adjusted according to requirements, ground monitoring can be achieved, and the installation process of the bridge plug can be grasped in real time.
Description
Technical field
The invention belongs to down-hole plugging equipment, particularly a kind of booster-type electric-controlled hydraulic bridging plug delivery tool.
Background technology
At present conventional bridging plug sets and is mainly divided into tubing transmission hydraulic setting and cable transmission blast sets two kinds of forms.When tubing transmission bridging plug sets, pressurizeed and promoted piston compression sebific duct by oil pipe, after promoting slips and sebific duct simultaneously and putting in place, continue pressurization, break tension force stick, slip out of the hand with bridging plug, realization sets, and setting tool trips out well head with oil pipe; When cable transmission bridging plug sets, ignite by cable cut-in point firearm the explosion energy promotion piston that gunpowder produces, piston promotes recipient opens slips, compression sebific duct, breaks tension force stick then, slips out of the hand with bridging plug, realization sets, and setting tool trips out well head with cable.
It is simple that above-mentioned cable transmission blast sets mode operation, be used widely, but gunpowder is dangerous material, in the processes such as order, keeping, filling, formality is numerous and diverse, in transport and use procedure, easily meet accident, similar accident happens occasionally, and entry and exit sometimes also can be restricted; And the residue inconvenience cleaning after powder burning, has affected erecting tools and has reused cycle and maintenance work amount; In addition, rapidly, expansion force is large in gunpowder outburst, and the load of erecting tools self is very large, easily produces distortion, therefore its application life is short, use cost is high.Comparatively speaking, hydraulic setting mode is safe and reliable, but the activity duration is long, inefficiency.
Summary of the invention
The object of this invention is to provide one, not only to set mode safe and reliable, and the activity duration is short, and operating efficiency is high, the booster-type electric-controlled hydraulic bridging plug delivery tool of long service life.
For achieving the above object, the present invention adopts following technical scheme:
A kind of booster-type electric-controlled hydraulic bridging plug delivery tool, comprises the motor cylinder, surge drum, hydraulic pressure boosting system and the working cylinder that connect successively from top to bottom; Motor, is located in motor cylinder, for connecting and driving described hydraulic pressure boosting system work; Accumulator, is located in surge drum, is used to hydraulic pressure boosting system oil storage; Oil pump, is located in accumulator and is arranged on hydraulic pressure boosting system, is used to hydraulic pressure boosting system fuel feeding; Described oil pump and motor output shaft are in transmission connection; Described hydraulic pressure boosting system, sets required pressure for the output pressure of small-power oil pump is risen to bridging plug; Described working cylinder, for transmitting the pressure of hydraulic pressure boosting system output and acting on bridging plug by bridging plug coupling assembling, realization sets.
Preferably, described hydraulic pressure boosting system, comprise the large cylinder of interconnective pressurized cylinder and the little cylinder of pressurized cylinder, in the large cylinder of pressurized cylinder and the little cylinder of pressurized cylinder, be respectively equipped with the large piston of supercharging and supercharging valve piston, the large piston of supercharging is connected by charged piston bar with supercharging valve piston, on the large cylinder of pressurized cylinder, be respectively equipped with in-line and oil return line, in-line and oil return line are communicated with rodless cavity and rod chamber in the large cylinder of pressurized cylinder respectively; The large cylinder of described pressurized cylinder is connected with surge drum, and the little cylinder of pressurized cylinder is tightly connected with working cylinder.
Preferably, described accumulator is leather bag, freely changes with liquid storage amount to realize the large I of volume, avoids occurring in the course of work negative pressure.
Preferably, described working cylinder comprises work cylinder barrel, in work cylinder barrel, is provided with interconnective working piston and working piston bar, is provided with bottom end cover in work cylinder barrel lower end, and described working piston bar is passed by described bottom end cover.
Preferably, described bridging plug coupling assembling comprises the interior connecting cylinder that is connected to described work cylinder barrel lower end, on interior connecting cylinder, be arranged with slideway and in slideway, be inserted with force transmitting board, force transmitting board is fixed on working piston bar lower end, below force transmitting board, be plugged with outer sleeve, in the centre bore of interior connecting cylinder lower end, be provided with the internal thread for connecting bridging plug end plate.
Preferably, be provided with the attachment plug of one in motor cylinder upper end.
Preferably, be provided with motor cabinet at surge drum internal upper part, described motor is fixed on motor cabinet.
Preferably, described oil pump and motor output shaft are in transmission connection by power transmission shaft and universal drive shaft.
Preferably, the sectional area of the large piston of described supercharging is much larger than the sectional area of supercharging valve piston, to improve boost performance.
The invention has the beneficial effects as follows:
1, adopt hydraulic setting mode, the course of work is safe and reliable;
2, utilize hydraulic booster principle, can make working cylinder pressure reach fast 50MPa, reach rapidly bridging plug setting force requirement is installed, the activity duration is short, and operating efficiency is high;
3, bridging plug set after this instrument can trip out well head with oil pipe, control hydraulic pressure boosting system reset after just reusable, long service life, maintenance work is simple;
4, hydraulic work system process is controlled, can adjust as required load and loading velocity; Can realize ground monitoring by electric machine controller curent change, grasp in real time bridging plug installation process.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
In figure: attachment plug 1, motor cylinder 2, motor 3, motor 4, surge drum 5, air trunking 501, power transmission shaft 6, accumulator 7, oil pump 8, the large cylinder 9 of pressurized cylinder, in-line 901, oil return line 902, the large piston 10 of supercharging, charged piston bar 11, supercharging valve piston 12, the little cylinder 13 of pressurized cylinder, work cylinder barrel 14, working piston 15, working piston bar 16, interior connecting cylinder 17, force transmitting board 18, outer sleeve 19, bridging plug 20, bottom end cover 21, fairlead 22, sealing bolt 23, sealing ring 24, universal drive shaft 25.
Detailed description of the invention
As shown in Figure 1, this booster-type electric-controlled hydraulic bridging plug delivery tool comprises the motor cylinder 2, surge drum 5, hydraulic pressure boosting system and the working cylinder that are threaded connection successively from top to bottom.Be provided with the attachment plug 1 being integrated with motor cylinder 2 in motor cylinder 2 upper ends, be provided with motor 3 in motor cylinder 2, as preferably, described motor 3 is rare earth direct current generator, and motor 3 wires are drawn by motor cylinder 2 upper ends.Be fixed with motor cabinet 4 at surge drum 5 internal upper parts by screw, described motor 3 is mounted by means of bolts on motor cabinet 4 upper ends.Be penetrated with power transmission shaft 6 at motor cabinet 4 endoporus, power transmission shaft 6 upper ends are connected with the output axle key of described motor 3.On the barrel of surge drum 5, be arranged with multiple air trunkings 501.
Described hydraulic pressure boosting system comprises the large cylinder 9 of the pressurized cylinder being mutually tightly connected by screw thread and sealing ring and the little cylinder 13 of pressurized cylinder, be provided with the large piston 10 of supercharging at the large cylinder of pressurized cylinder 9 inner chambers, be provided with supercharging valve piston 12 at the little cylinder of pressurized cylinder 13 inner chambers, the sectional area of the large piston 10 of supercharging is much larger than the sectional area of supercharging valve piston 12, between the large piston 10 of supercharging and supercharging valve piston 12, be fixedly connected with by charged piston bar 11, on the large piston 10 of supercharging and supercharging valve piston 12, be respectively installed with multiple sealing rings 24.On the large cylinder 9 of pressurized cylinder, be respectively equipped with in-line 901 and oil return line 902, in-line 901 and oil return line 902 are communicated with rodless cavity and rod chamber in the large cylinder 9 of pressurized cylinder respectively.Described pressurized cylinder large cylinder 9 tops and surge drum 5 lower ends are threaded connection.
In described surge drum 5, be provided with accumulator 7, described accumulator 7 for leather bag and be sealedly connected on motor cabinet 4 and the large cylinder 9 of pressurized cylinder between, freely change with liquid storage amount to realize the large I of volume, avoid occurring in the course of work negative pressure.In accumulator 7, be provided with oil pump 8, as preferably, described oil pump 8 is for gear pump and be bolted on the large cylinder of pressurized cylinder 9 upper ends, described power transmission shaft 6 lower ends are connected by universal drive shaft 25 with oil pump 8 inputs, the oil-out of oil pump 8 is communicated with described in-line 901, and described oil return line 902 is communicated with accumulator 7 inner chambers.
Described working cylinder comprises work cylinder barrel 14, in work cylinder barrel 14, be provided with the working piston 15 and the working piston bar 16 that interfix and peg graft, be connected with bottom end cover 21 in work cylinder barrel 14 lower ends, be connected with fairlead 22 at bottom end cover 21 centers, described working piston bar 16 is passed by fairlead 22 and bottom end cover 21.Described work cylinder barrel 14 is tightly connected by screw thread and sealing ring with upper end and the little cylinder of described pressurized cylinder 13 lower ends, and described working piston 15 equates with the sectional area of the large piston 10 of supercharging.Be arranged with oil filler point and seal by sealing bolt 23 on work cylinder barrel 14 tops, prestoring respectively a certain amount of hydraulic oil the large cylinder 9 of described accumulator 7, pressurized cylinder, the little cylinder 13 of pressurized cylinder and work cylinder barrel 14 are interior.
Below working cylinder, be provided with the bridging plug coupling assembling for connecting bridging plug.Described bridging plug coupling assembling comprises the interior connecting cylinder 17 being threaded connection in described bottom end cover 21 lower ends, on interior connecting cylinder 17, be arranged with slideway and in slideway, be inserted with force transmitting board 18, force transmitting board 18 centers are fixedly set in described working piston bar 16 lower ends, below force transmitting board 18, be plugged with outer sleeve 19, in interior connecting cylinder 17 lower end centre bores, be provided with the internal thread for connecting bridging plug end plate.
When use, in being screwed in, the connecting rod of bridging plug end plate in connecting cylinder 17 lower end centre bores, make bridging plug 20 be fixed on the lower end of bridging plug coupling assembling; Again this delivery tool is connected and gets final product G.I.H with steel wire cable by attachment plug 1.Until under behind setting position, by the motor cable starter motor 3 that switches on power, motor 3 drives oil pump 8 to work by universal drive shaft 25, make hydraulic oil flow into the rodless cavity in the large cylinder 9 of pressurized cylinder from accumulator 7, the large cylinder of pressurized cylinder 9 oil pressure increase, and promote the large piston 10 of supercharging and supercharging valve piston 12 synchronizing movings, make hydraulic oil in the little cylinder 13 of pressurized cylinder by compression, oil pressure raises, and push the work forward piston 15 and working piston bar 16 move.In the time of the stress balance of pressurized cylinder two ends, equaling pressure according to pressure, to be multiplied by area theorem known, and when pressure one timing, the pressure that area is little is large, because large piston 10 areas of pressurized cylinder are greater than pressurized cylinder valve piston 12 areas, therefore the pressure in the little cylinder 13 of pressurized cylinder is greater than the pressure in the large cylinder 9 of pressurized cylinder.Again because large piston 10 areas of working piston 15 areas and supercharging are identical, but the hydraulic oil pressure acting on working piston 15 is the pressure increase in the little cylinder 13 of pressurized cylinder, therefore the pressure acting on working piston 15 just can increase compared with the pressure acting on the large piston 10 of supercharging, thereby realizes pressurized effect.
Hydraulic oil after working piston 15 and working piston bar 16 are pressurized promotes, working piston bar 16 moves down and drives force transmitting board 18 to move, and compress the rubber sleeve of bridging plug 20 outsides by outer sleeve 19, because the connecting rod of bridging plug end plate is connected with work cylinder barrel 14 by interior connecting cylinder 17, therefore the rubber sleeve of bridging plug 20 outsides can be located by outer sleeve 19 compression-expansion in well casing, realizes bridging plug 20 and sets.
In the time acting on pressure on bridging plug 20 and reach certain value, just the connecting rod of bridging plug end plate is broken, this delivery tool and bridging plug 20 are departed from, just can take out this delivery tool.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in manual and embodiment, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.
Claims (9)
1. a booster-type electric-controlled hydraulic bridging plug delivery tool, is characterized in that: comprise the motor cylinder, surge drum, hydraulic pressure boosting system and the working cylinder that connect successively from top to bottom;
Motor, is located in motor cylinder, for connecting and driving described hydraulic pressure boosting system work;
Accumulator, is located in surge drum, is used to hydraulic pressure boosting system oil storage;
Oil pump, is located in accumulator and is arranged on hydraulic pressure boosting system, is used to hydraulic pressure boosting system fuel feeding; Described oil pump and motor output shaft are in transmission connection;
Described hydraulic pressure boosting system, sets required pressure for the output pressure of small-power oil pump is risen to bridging plug;
Described working cylinder, for transmitting the pressure of hydraulic pressure boosting system output and acting on bridging plug by bridging plug coupling assembling, realization sets.
2. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, it is characterized in that: described hydraulic pressure boosting system, comprise the large cylinder of interconnective pressurized cylinder and the little cylinder of pressurized cylinder, in the large cylinder of pressurized cylinder and the little cylinder of pressurized cylinder, be respectively equipped with the large piston of supercharging and supercharging valve piston, the large piston of supercharging is connected by charged piston bar with supercharging valve piston, on the large cylinder of pressurized cylinder, be respectively equipped with in-line and oil return line, in-line and oil return line are communicated with rodless cavity and rod chamber in the large cylinder of pressurized cylinder respectively; The large cylinder of described pressurized cylinder is connected with surge drum, and the little cylinder of pressurized cylinder is tightly connected with working cylinder.
3. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, is characterized in that: described accumulator is leather bag.
4. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, it is characterized in that: described working cylinder comprises work cylinder barrel, in work cylinder barrel, be provided with interconnective working piston and working piston bar, be provided with bottom end cover in work cylinder barrel lower end, described working piston bar is passed by described bottom end cover.
5. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 4, it is characterized in that: described bridging plug coupling assembling comprises the interior connecting cylinder that is connected to described work cylinder barrel lower end, on interior connecting cylinder, be arranged with slideway and in slideway, be inserted with force transmitting board, force transmitting board is fixed on working piston bar lower end, below force transmitting board, be plugged with outer sleeve, in the centre bore of interior connecting cylinder lower end, be provided with the internal thread for connecting bridging plug end plate.
6. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, is characterized in that: be provided with the attachment plug of one in motor cylinder upper end.
7. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, is characterized in that: be provided with motor cabinet at surge drum internal upper part, described motor is fixed on motor cabinet.
8. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 1, is characterized in that: described oil pump and motor output shaft are in transmission connection by power transmission shaft and universal drive shaft.
9. booster-type electric-controlled hydraulic bridging plug delivery tool according to claim 2, is characterized in that: the sectional area of the large piston of described supercharging is much larger than the sectional area of supercharging valve piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219760.1A CN104018797A (en) | 2014-05-23 | 2014-05-23 | Booster type electronic control hydraulic bridge plug feeding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410219760.1A CN104018797A (en) | 2014-05-23 | 2014-05-23 | Booster type electronic control hydraulic bridge plug feeding tool |
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| Publication Number | Publication Date |
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| CN104018797A true CN104018797A (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410219760.1A Pending CN104018797A (en) | 2014-05-23 | 2014-05-23 | Booster type electronic control hydraulic bridge plug feeding tool |
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| CN (1) | CN104018797A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465062A (en) * | 2015-11-19 | 2016-04-06 | 北京美高科技发展有限公司 | Cable type static-pressure setting tool |
| CN106499361A (en) * | 2016-12-13 | 2017-03-15 | 中国石油集团西部钻探工程有限公司 | Electric-controlled hydraulic automatic setting bridging device |
| CN107965285A (en) * | 2017-11-27 | 2018-04-27 | 中国石油集团渤海钻探工程有限公司 | A kind of train is driven continuous booster-type electric hydaulic bridge plug setting tool |
| CN108150121A (en) * | 2017-12-21 | 2018-06-12 | 中国石油集团渤海钻探工程有限公司 | Jet flow pressurizing formula electric hydaulic bridge plug setting tool |
| CN109594949A (en) * | 2018-11-06 | 2019-04-09 | 中国石油集团渤海钻探工程有限公司 | A kind of planetary gear set supercharged hydraulic bridge plug setting tool |
| CN109838216A (en) * | 2017-11-29 | 2019-06-04 | 江苏科技大学 | Electric hydaulic reinforcement setting tool for bridge plug |
| CN112145109A (en) * | 2020-09-14 | 2020-12-29 | 南通大学 | Bridge plug valveless hydraulic setting tool |
| CN114961611A (en) * | 2022-05-27 | 2022-08-30 | 天津东拓油田技术服务有限公司 | Electronic hydraulic bridge plug putting tool |
| CN115450581A (en) * | 2022-10-28 | 2022-12-09 | 四川航天烽火伺服控制技术有限公司 | Electric setting tool |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2169722Y (en) * | 1993-04-18 | 1994-06-22 | 周龙生 | High effect energy saving pressure increasing device |
| US20070119600A1 (en) * | 2000-06-30 | 2007-05-31 | Gabriel Slup | Drillable bridge plug |
| CN102852476A (en) * | 2012-09-15 | 2013-01-02 | 中国石油集团西部钻探工程有限公司 | Underground stretching tool |
| CN103075123A (en) * | 2013-01-23 | 2013-05-01 | 中国航天科技集团公司烽火机械厂 | Electro-hydraulic driving setting tool |
-
2014
- 2014-05-23 CN CN201410219760.1A patent/CN104018797A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2169722Y (en) * | 1993-04-18 | 1994-06-22 | 周龙生 | High effect energy saving pressure increasing device |
| US20070119600A1 (en) * | 2000-06-30 | 2007-05-31 | Gabriel Slup | Drillable bridge plug |
| CN102852476A (en) * | 2012-09-15 | 2013-01-02 | 中国石油集团西部钻探工程有限公司 | Underground stretching tool |
| CN103075123A (en) * | 2013-01-23 | 2013-05-01 | 中国航天科技集团公司烽火机械厂 | Electro-hydraulic driving setting tool |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465062A (en) * | 2015-11-19 | 2016-04-06 | 北京美高科技发展有限公司 | Cable type static-pressure setting tool |
| CN106499361A (en) * | 2016-12-13 | 2017-03-15 | 中国石油集团西部钻探工程有限公司 | Electric-controlled hydraulic automatic setting bridging device |
| CN106499361B (en) * | 2016-12-13 | 2023-03-14 | 中国石油天然气集团有限公司 | Electric control hydraulic automatic setting bridge plug device |
| CN107965285A (en) * | 2017-11-27 | 2018-04-27 | 中国石油集团渤海钻探工程有限公司 | A kind of train is driven continuous booster-type electric hydaulic bridge plug setting tool |
| CN107965285B (en) * | 2017-11-27 | 2019-12-13 | 中国石油集团渤海钻探工程有限公司 | Continuous booster-type electric hydraulic bridge plug setting tool for wheel train transmission |
| CN109838216A (en) * | 2017-11-29 | 2019-06-04 | 江苏科技大学 | Electric hydaulic reinforcement setting tool for bridge plug |
| CN108150121B (en) * | 2017-12-21 | 2019-12-13 | 中国石油集团渤海钻探工程有限公司 | jet flow pressurization type electric hydraulic bridge plug setting tool |
| CN108150121A (en) * | 2017-12-21 | 2018-06-12 | 中国石油集团渤海钻探工程有限公司 | Jet flow pressurizing formula electric hydaulic bridge plug setting tool |
| CN109594949A (en) * | 2018-11-06 | 2019-04-09 | 中国石油集团渤海钻探工程有限公司 | A kind of planetary gear set supercharged hydraulic bridge plug setting tool |
| CN109594949B (en) * | 2018-11-06 | 2022-01-18 | 中国石油集团渤海钻探工程有限公司 | Planetary gear set booster-type hydraulic bridge plug setting tool |
| CN112145109A (en) * | 2020-09-14 | 2020-12-29 | 南通大学 | Bridge plug valveless hydraulic setting tool |
| CN114961611A (en) * | 2022-05-27 | 2022-08-30 | 天津东拓油田技术服务有限公司 | Electronic hydraulic bridge plug putting tool |
| CN115450581A (en) * | 2022-10-28 | 2022-12-09 | 四川航天烽火伺服控制技术有限公司 | Electric setting tool |
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Application publication date: 20140903 |
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