CN205638294U - Utilize general oil pipe to realize continuous cycle horizontal well pit shaft treatment process tubular column device - Google Patents
Utilize general oil pipe to realize continuous cycle horizontal well pit shaft treatment process tubular column device Download PDFInfo
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- CN205638294U CN205638294U CN201620424846.2U CN201620424846U CN205638294U CN 205638294 U CN205638294 U CN 205638294U CN 201620424846 U CN201620424846 U CN 201620424846U CN 205638294 U CN205638294 U CN 205638294U
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- well head
- sand
- horizontal well
- hydraulic
- continuous cycle
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Abstract
The utility model relates to a general oil pipe in usable oil field establishs the supporting device of technology of continuous cycle, handles neighborhood performance important function at the horizontal well pit shaft. Utilize general oil pipe to realize continuous cycle horizontal well pit shaft treatment process tubular column device promptly. It includes that hydraulic pressure automatic control switching -over well head, the switching -over valve, the supporting broken sand of connecting that pass through at hydraulic pressure automatic control switching -over well head center scrapes whirl sand washing ware and hydraulic pressure automatic control switching -over well head sail tangential belt cartridge formula quick connector. Utilize general oil pipe, ingenious cooperation through switching -over well head and switching -over valve can vary circulation canal voluntarily when the make up a joint, create to need not the termination of pumping, and the execution conditions of continuous cycle are particularly useful for the horizontal well pit shaft and handle various construction needs that need continuous cycle, when card tubular column risk is buried to fundamentally eliminate water horizontal well section, simplify the operation procedure by a wide margin, reduce intensity of labour, improve the efficiency of construction, reduce construction cost.
Description
Technical field
This utility model relates to a kind of available oil field plain tubing and sets up the Technology corollary apparatus of circulation continuously (forward, reversely), plays a significant role at horizontal well wellbore treatments neighborhood.I.e. one utilizes plain tubing to realize continuously circulating water horizontal well wellbore treatments process pipe string device.
Background technology
Horizontal well is as extra-low-permeability reservoir and the important technical of development late stage agent for improving oilfield recovery, promoted rapidly in each oil field of China, but, the most exactly because the own structural characteristics of horizontal well and productive prospecting determine, the horizontal well of many perforated intervals, during extraction, pressure break burning into sand easily separates out with production fluid, is deposited on net horizontal section, forms very long sand bridge, even sand buries whole tubing string, and have also can form hard cementing sand bridge in multiple factor effects such as well liquid, temperature, pressure；It addition, couch in borehole wall lower end at net horizontal section flow string, these factors of stress form change, frictional resistance increase, object settling height shortening etc. the most easily cause tubing string meet card or buried by sand, process such accident and control much more than Vertical Well complexity, difficulty.
The tool tubular column that current domestic each oil field uses is based on plain tubing, grinding card is bored with plain tubing sand washing or link helicoid hydraulic motor, elemental operation program is to tear (connecing) open by root to play (putting), routine work rule be tear open (connecing) single time must termination of pumping, can not circulate continuously, not only operate complexity, efficiency and low, the more important thing is the great risk being faced with float secondary precipitation card pipe laying post, the most therefore wellbore treatments is caused to become more sophisticated, severeer, so, realize plain tubing and set up circulation continuously, become the key problem in technology improving horizontal well wellbore treatments.
Utility model content
The purpose of this utility model is to provide one to utilize plain tubing to realize continuously circulating water horizontal well wellbore treatments process pipe string device for above-mentioned deficiency, i.e. use conventional plain tubing, create a kind of can auto-changing circulation canal when well head connects single, realize without termination of pumping, the corollary apparatus of the specific function of circulation continuously.
Technical solution of the present utility model is: one utilizes plain tubing to realize continuously circulating water horizontal well wellbore treatments process pipe string device, it is characterised in that include hydraulic self-control commutation well head, hydraulic self-control commutation well head centrally through reversal valve, the broken sand scraping cyclone sand washing device of supporting connection and hydraulic self-control commutation well head on rotary hose plug-in quick connector.
Described plain tubing circulates reversal valve continuously and includes that the upper and lower two ends of central canal, equipped with the top connection matched with sand-flushing pipe column and lower contact, are provided with one section of stifled body (can not be through in making pipe) in center tubes, and stifled body two ends have upper and lower liquid window excessively；It is set with outside central canal that two ends bands seals, middle concave is empty, center pipe plug body can be allowed to connect up and down or the sliding sleeve that cuts off and the Rectangular Spring supporting this sliding sleeve and spring socket sleeve.
Described hydraulic self-control commutation well head is made up of two parts, one is hydraulic self-control commutation well head main cylinder, equipped with upper inside it, lower seal gum cover, coordinate with circulation pipe string, it is built into A while realizing Seal Oil set annular space, two liquid in-out circulation canals of C, with connecting A on the well head main cylinder wall of respective channel, the male joint of C pipeloop, on, lower seal gum cover is hydraulic packing form, the well head main cylinder wall of the seal rubber sleeve of each correspondence there is hydraulic pressure water injection interface, collect for hydraulic pressure water injection interface by threeway, it is connected with circulation water filling port with high-pressure rubber pipe, pressure fluid is provided by pump truck；Two is hydraulic self-control commutation well head voltage stabilizing buffer, and including liquid inlet and outlet interface, fluid cylinder is built with hydro-cushion piston, and piston, by supporting spring supporting, can adjust the seal pressure setting well head by adjusting rod and Pressure gauge；Relief valve be used for run into suppress pump or pump truck pressure larger fluctuation situation time automatic drainage blood pressure lowering, to protect equipment to be not damaged by.
Described broken sand scraping cyclone sand washing device includes eddy flow restraint slot that the spiral scraping land of Surface hardening treatment, reasonable size arrange in pairs or groups, the duckbilled broken sand shovel containing cross head design form of paving weldering hard alloy and compound grate sand cover.
Described rotary hose plug-in quick connector include inside stud with the main body of plug-in mounting hermetically sealed connector of sealing ring, locking steelball, locking set, support spring and in the unidirectional valve valve group that sets.
This utility model relates to three big subject contents: 1, use conventional plain tubing, create a kind of well head connect (or dismounting) single time can auto-changing circulation canal, it is achieved without termination of pumping, the corollary apparatus of the specific function of circulation continuously；2, there is higher broken cementing sand bridge, cleaning tube wall ability and sand washing, the broken sand scraping cyclone sand washing device of sand carrying effect；3, can significantly simplify operation routine, reduce labor intensity, improve the plug-in quick connector of efficiency of construction.
The utility model has the advantages that:
1, plain tubing is utilized, by commutation well head and the ingenious cooperation of reversal valve, when making up a joint can auto-changing circulation canal, create without termination of pumping, the execution conditions of circulation continuously (forward, reversely), it is particularly suited for the construction needs that the various needs of horizontal well wellbore treatments circulate continuously, it is being inherently eliminated while net horizontal section buries card tubing string risk, is significantly simplifying operation routine, reduce labor intensity, improve efficiency of construction, reduce construction cost.
2, for sand washing operation, when running into hard cementing sand bridge, can effectively crush sand bridge, and thorough for the bur on tube wall scraping be removed clean.
3, grind operation for screw rod pump drill, brill can be made to grind effect and improve more than 3 times.
Accompanying drawing explanation
Fig. 1 is that this utility model plain tubing continuous circulation process tubing string assembles schematic diagram.
Fig. 2 is hydraulic self-control commutation well head and reversal valve fit structure sketch.
Fig. 3 is hydraulic self-control commutation shaft collar sketch.
Fig. 4 is structure of reversing valve sketch.
Fig. 5 is hydraulic self-control voltage stabilizing buffer structure figure.
Fig. 6 is broken sand scraping cyclone sand washing device structure chart.
Fig. 7 is plug-in rotary hose quick connector structure chart.
Fig. 8 is Fig. 3 contour structures sketch.
Detailed description of the invention
Seeing Fig. 1, parts title is as follows: well head top connection 4, well head lower contact 6, ring flange 15, sleeve pipe 21, elevator 28, rotary hose 43, rotary hose plug-in quick connector 45, hydraulic self-control commutation well head 46, broken sand scraping cyclone sand washing device 47, oil pipe 49.
One utilizes plain tubing to realize continuously circulating water horizontal well wellbore treatments process pipe string device, and the plain tubing including hydraulic self-control commutation well head 46 with through hydraulic self-control commutation well head 46 center circulates reversal valve 42 continuously.Hydraulic self-control commutation well head 46 upper end water receiving tengential belt plug-in quick connector 45, the hydraulic self-control commutation well head broken sand scraping cyclone sand washing device 47 of 46 times terminations.Utilize conventional plain tubing, by hydraulic self-control commutation well head 46 and the ingenious cooperation of reversal valve 42, the auto-changing circulation canal when making up a joint, it is not necessary to termination of pumping, realize circulation continuously (reverse or forward), from this, eliminate all drawbacks of plain tubing regular circulation.
See Fig. 1-3,8, parts title is as follows: see Fig. 1, well head top connection 4, well head lower contact 6, ring flange 15, sleeve pipe 21, elevator 28, rotary hose 43, rotary hose plug-in quick connector 45, hydraulic self-control commutation well head 46, broken sand scraping cyclone sand washing device 47, oil pipe 49.See Fig. 2, main cylinder 1, gum cover 2, annular space 3, well head top connection 4, hydraulic pressure water injection interface 5, central canal 7, ring flange 15, elevator 28.See Fig. 3, gum cover 2, annular space 3, well head top connection 4, ring flange 15, gland 16, splicing sleeve 17, liquid-through hole 18, cover for seat 19, spacer ring 29.Seeing Fig. 8, parts title is as follows: main cylinder 1, well head top connection 4, hydraulic pressure water injection interface 5, ring flange 15, pressure regulation bar 36, Pressure gauge 38.
Hydraulic self-control commutation well head 46 includes main cylinder 1, main cylinder 1 be lined with between the upper and lower every seal rubber sleeve 2, annular space 3 is had between gum cover 2 and main cylinder 1 wall, the well head top connection 4 communicated with the external world is had on main cylinder 1 sidewall corresponding between two gum covers 2, the hydraulic pressure water injection interface 5 communicated with gum cover annular space 3 is had on main cylinder 1 sidewall, having the well head lower contact 6 communicated with in it on the pipeline of main cylinder 1 bottom, main cylinder 1 bottom is with the ring flange 15 being connected with well head.Gum cover 2 two ends are lined with I-shaped splicing sleeve 17 with metal backup shoe 16, gum cover annular space 3 face, with crossing liquid window 18 on splicing sleeve 17.
Hydraulic self-control commutation well head 46 is to realize second crucial matching component that plain tubing not termination of pumping circulates continuously.It is made up of two parts: first is hydraulic self-control commutation well head main cylinder 1, equipped with upper and lower seal rubber sleeve 2 inside it, coordinate with circulation pipe string, it is built into two liquid in-out circulation canals of A, C, with connecting the pin thread well head top connection 4 of pipeloop, well head lower contact 6 on the well head main cylinder wall of respective channel while realizing Seal Oil set annular space.Upper and lower seal rubber sleeve 2 is hydraulic packing form, well head main cylinder 1 wall of the seal rubber sleeve 2 of each correspondence there is hydraulic pressure water injection interface, being collected by threeway is a hydraulic pressure water injection interface 5, is connected with hydraulic pressure water injection interface 5 with high-pressure rubber pipe, and pressure fluid is provided by pump truck.Second is hydraulic self-control commutation well head voltage stabilizing buffer (see figure 5), the band press liquid introduced by circulation liquid injection port is entered cylinder body 4 by inlet 1, be injected separately into the hydraulic pressure ring control of commutation well head upper-lower seal gum cover by liquid outlet 2, compression gum cover is embraced circulation pipe string, is closed oil jacket annular space.The size sealing pressure is set by pressure regulation bar 7, Pressure gauge 3 and support spring 6.Put tubing string and cross box cupling when rising and cause the pressure oscillation of little scope due to the change of external diameter, by the steady pressure of dummy piston 5, when chance suppresses pump or pump truck pressure increases to over suddenly when setting pressure values, and relief valve 8 can brake discharge opeing pressure release, to protect sealing member to be not damaged by.Inlet 53, liquid outlet 54 is had on fluid cylinder 34.
See Fig. 1,4, parts title is as follows: parts title is as follows: well head top connection 4, well head lower contact 6, ring flange 15, sleeve pipe 21, elevator 28, rotary hose 43, rotary hose plug-in quick connector 45, hydraulic self-control commutation well head 46, broken sand scraping cyclone sand washing device 47, oil pipe 49.Central canal 7, upper and lower union joint 8,9, stifled body 10, cross liquid window 11, spring 12, sliding sleeve 13, cross pendular ring sky 14, cover for seat 19.
Reversal valve 42 includes central canal 7, the upper and lower union joint 8,9 of band connected pipes on central canal 7；There is one section of stifled body 10 in central canal 7, the tube wall of stifled body 10 both sides circumferentially has multiple liquid window 11(window excessively)；The sliding sleeve 13 that the one section of two ends being cased with spring 12 on central canal 7 outer surface and be cased with being abutted against with spring 12 all seal, had pendular ring sky 14 between sliding sleeve 13 and central canal 7 outer surface, spring 12 is with cover for seat 19；Sealing liquid injection pipe joint is had on hydraulic self-control commutation well head 46.
Reversal valve 42 is to realize plain tubing not termination of pumping, first crucial matching component of circulation continuously, its central canal about 7 two ends are equipped with the upper and lower union joint 8,9 matched with sand-flushing pipe column, being provided with in central canal 7 body can not be through in one section of stifled body 10(makes pipe), stifled body 10 two ends have upper and lower liquid window 11(window excessively)；It is set with two ends band sealing, middle concave sky outside central canal 7, center pipe plug body can be allowed to connect up and down or the sliding sleeve 13 cut off and Rectangular Spring 12 and the spring socket sleeve 19 supporting this sliding sleeve.When sliding sleeve 13 is not by External Force Acting, under the effect supporting spring 12, the sealing at sliding sleeve 13 two ends just blocks the outer end of dropping window on the pipe plug body of center, and now liquid can walk around stifled body 10 up/down perforation.When sliding sleeve 13 is up by lifting force compression spring 12, sliding sleeve 13 lower seal just blocks when corresponding pipe plug body 10 position, center (position between upper dropping window), walk around the outer collarette control passage of center pipe plug body 10 isolated while, stifled body 10 dropping window is open to be connected outside pipe, when releasing when above pushing away active force of sliding sleeve 13, under the effect supporting spring 12, sliding sleeve 13 return circulates in recovering to walk around through windowing the pipe of stifled body 10 again.
Rising, put the circulation approach of liquid during tubing string: before reversal valve 42 does not enters into commutation well head not by External Force Acting in the case of, reversal valve sliding sleeve 13 is under the support of spring 12, block the outer end crossing liquid window 11 at center pipe plug body up and down, inside is built into the peripheral channel that can bypass stifled body 10, now liquid can walk around stifled body 10 by upper and lower windowing 11, up/down perforation, constitutes A B circulation canal with surface water tengential belt.
When when reversal valve 42 is transferred and sat on wellhead lifting-clamping, preparation connection (or dismounting) is single, the sliding sleeve 13 of reversal valve moves in pushes compression springs 12 on seal rubber sleeve on commutation well head, sealing just card in sliding sleeve 13 lower end is enclosed in pipe plug body two ends, center and windows between 11, while 11 passages are windowed in disconnection pipe plug body upper end, center, open pipe plug body lower end, center window 11 is just corresponding through with the well head pipeloop interface between commutation well head two seal rubber sleeve 2, original rotary hose circulation canal is automatically converted to well head A C circulation canal continue circulation, now reversal valve blocks up window on body 10 and has disconnected water source, (unloading) can be connect the most relievedly single.
Connect (unloading) complete single after continue to carry, put tubing string, reversal valve sliding sleeve 13 by commutation well head lower seal gum cover 2 after, relieve the gum cover 2 active force to sliding sleeve 13, sliding sleeve 13 can automatically reset under spring force and connect with rotary hose 43, again recover A B circulation.Often connect (dismounting) single action in this way, thus reach not termination of pumping and realize the purpose of circulation continuously.
Seeing Fig. 5, parts title is as follows: voltage stabilizing buffer 33, fluid cylinder 34, hydro-cushion piston 35, pressure regulation bar 36, supports spring 37, Pressure gauge 38, relief valve 39, inlet 53, liquid outlet 54.
Seal on liquid injection pipe joint 50 with voltage stabilizing buffer 33, voltage stabilizing buffer 33 includes fluid cylinder 34, fluid cylinder 34 is built with hydro-cushion piston 35, hydro-cushion piston 35 left end connects the pressure regulation bar 36 stretching out fluid cylinder 34, piston 35 is supported connection by supporting spring 37, and fluid cylinder 34 has Pressure gauge 38, relief valve 39.
Seeing Fig. 6, parts title is as follows: oblique fire liquid outlet 20, top connection 22, scraping land 23, eddy flow restraint slot 24, grate sand cover 25, broken sand shovel 26, hard alloy 27.
Ring flange 15 connects sleeve pipe 21, and sleeve pipe 21 connects broken sand scraping cyclone sand washing device 47；Broken sand scraping cyclone sand washing device 47 includes that the top connection 22, helical form scraping land 23 and the eddy flow restraint slot 24 that are sequentially connected with, grate sand cover 25, broken sand shovel 26.It is that duckbilled contains cross-head type and breaks sand shovel that broken sand shovels 26 lower ends, interior for taper, surface paving weldering hard alloy 27.Grate sand cover 25 is shell-like, is separated with oblique fire liquid outlet 20 between having multiple tracks circumferentially.Many for horizontal well perforation section, it is serious that oil reservoir tells sand, in addition by well liquid composition, temperature, pressure effect, easily form very long and hard cementing sand bridge at net horizontal section, hinder sand-flushing pipe column to pass through this difficult problem, devise the broken sand scraping cyclone sand washing device 47 integrating brokenly the various functions such as sand, scraping, swirl injection.
The left end that broken sand scraping cyclone sand washing device 47 includes is that the top connection 22 that is connected with circulation pipe string, maximum diameter cylindrical spread all over harveyed helical form scraping land 23, and any bur on casing wall is thoroughly removed totally by the effect that can play scraper.Owing between scraping land 23 and casing wall, gap is the least, eddy flow restraint slot 24(spiral grooves with scraping land 23 syngenesis) the huge discharge sand cleaning fluid that high pressure injects can be made in order and rushed at shaft bottom for the high pressure cyclone rotated in one direction, take it out pit shaft with desilting after being sufficiently stirred for.Right-hand member at sand washing machine is provided with duckbilled and breaks sand shovel 26, broken sand shovel surface paving weldering hard alloy 27 containing cross-head type, has good location and smashs function to pieces, overcomes the drawback that beveled tip is lain prone along slope.Between broken sand shovel 26 and scraping land 23, reacting cycle import position is provided with grate sand cover 25, grate sand cover 25 is shell-like, is separated with oblique fire liquid outlet 20 between having multiple tracks circumferentially, can be by larger object every keeping away outside, to crush further, preventing lump from entering and blocking circulation canal.
Seeing Fig. 7, parts title is as follows: locking steelball 30, supports spring 31, unidirectional valve valve group 32, main body 40, locks set 41, locks spring 55.
Hydraulic self-control commutation well head 46 upper end connects rotary hose plug-in quick connector 45, rotary hose plug-in quick connector 45 includes that inside studs with the main body of plug-in mounting hermetically sealed connector 40 of sealing ring, locking set 41 is connected outside main body 40 right-hand member, equipped with a locking steelball 30 enclosing retractable and expose at main body 40 inner surface between locking set 41 and main body 40, main body 40 is internal is provided with unidirectional valve valve group 31, with supporting unidirectional valve valve group 32 in spring 32 supports unidirectional valve valve group 31, it is used for blocking rotary hose 43 withdrawing fluid, main body 40 left end water receiving tengential belt 43.For plain tubing connect (unloading) single must again and again pound oil nonyl, handling this troublesome operation process of short circuit, design one can significantly simplify procedures, reduce labor intensity, improve work efficiency, cut down construction cost plug-in quick connector.See Fig. 7, rotary hose plug-in quick connector: rotary hose plug-in quick connector 45 left end is the oily nonyl joint 44 of oil nonyl form, be used for connecting rotary hose 43.Right-hand member is for connection to the sealing locking set 41(of reversal valve box cupling or claims locking set), in the lower end of locking set 41 equipped with the locking steelball 30 of a circle retractable, with reversal valve 42 to after connecting or claim just to fall in the lock slots of reversal valve 42, overlapped 41 by the locking of outside retrain its locking with locking spring 55 or unlock, it is provided with unidirectional valve valve group in the inside of oil nonyl joint 44, supports unidirectional valve valve group 32 for blocking rotary hose 43 withdrawing fluid with supporting spring 31.When connecting rotary hose 43, only need one to carry, one put, can safety the most convenient, fast, be the critical component of raising efficiency of construction.
Claims (1)
1. one kind utilizes plain tubing to realize continuously circulating water horizontal well wellbore treatments process pipe string device, it is characterised in that include hydraulic self-control commutation well head (46), hydraulic self-control commutation well head (46) centrally through reversal valve (42), broken sand scraping cyclone sand washing device (47) of supporting connection and hydraulic self-control commutation well head (46) go up rotary hose plug-in quick connector (45)；
Described plain tubing circulates reversal valve (42) continuously and includes that central canal (7) two ends up and down are equipped with the top connection (8) matched with sand-flushing pipe column and lower contact (9), being provided with one section of stifled body (10) in central canal 7 body, stifled body (10) two ends have upper and lower liquid window (11) excessively；It is set with outside central canal 7 that two ends bands seals, middle concave is empty, center pipe plug body can be allowed to connect up and down or the sliding sleeve (13) that cuts off and the Rectangular Spring (12) of this sliding sleeve of support (13) and spring socket sleeve (19)；
Described hydraulic self-control commutation well head (46) is made up of two parts, one is hydraulic self-control commutation well head main cylinder (1), equipped with upper inside it, lower seal gum cover (2), coordinate with circulation pipe string, it is built into A while realizing Seal Oil set annular space (3), two liquid in-out circulation canals of C, with connecting A on the well head main cylinder wall of respective channel, the male joint of C pipeloop, on, lower seal gum cover (2) is hydraulic packing form, the well head main cylinder wall of the seal rubber sleeve (2) of each correspondence there is hydraulic pressure water filling port, collect for hydraulic pressure water injection interface (5) by threeway, it is connected with circulation fluid pressure water injection interface (5) with high-pressure rubber pipe, pressure fluid is provided by pump truck；Two is hydraulic self-control commutation well head voltage stabilizing buffer (33), including liquid inlet and outlet interface (53), (54), fluid cylinder is built with hydro-cushion piston (35), hydro-cushion piston (35) is supported by supporting spring (37), can pass through adjusting rod (36) and Pressure gauge (38) adjusts the seal pressure setting well head；It is additionally provided with relief valve (39)；
Described broken sand scraping cyclone sand washing device (47) includes the duckbilled broken sand shovel (26) and compound grate sand cover (25) containing cross head design form of eddy flow restraint slot (24) that spiral scraping land (23) of Surface hardening treatment, reasonable size arrange in pairs or groups, paving weldering hard alloy (27)；
Described rotary hose plug-in quick connector (45) include inside stud with the main body of the plug-in mounting hermetically sealed connector (40) of sealing ring, locking steelball (30), locking set (41), support spring (31) and in unidirectional valve valve group (32) that sets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620117698X | 2016-02-06 | ||
| CN201620117698 | 2016-02-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205638294U true CN205638294U (en) | 2016-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620424846.2U Withdrawn - After Issue CN205638294U (en) | 2016-02-06 | 2016-05-12 | Utilize general oil pipe to realize continuous cycle horizontal well pit shaft treatment process tubular column device |
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| Country | Link |
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| CN (1) | CN205638294U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804679A (en) * | 2016-02-06 | 2016-07-27 | 高伟时 | Horizontal well shaft processing process tubing string device for realizing continuous circulation by ordinary oil pipe |
| CN106761549A (en) * | 2016-12-01 | 2017-05-31 | 中国石油天然气股份有限公司 | Self-balancing positive and negative bidirectional continuous circulation operation device |
| CN107218003A (en) * | 2017-07-18 | 2017-09-29 | 中国石油集团渤海钻探工程有限公司 | Coal bed gas continuous punching sandpipe string and its sand washing method |
-
2016
- 2016-05-12 CN CN201620424846.2U patent/CN205638294U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105804679A (en) * | 2016-02-06 | 2016-07-27 | 高伟时 | Horizontal well shaft processing process tubing string device for realizing continuous circulation by ordinary oil pipe |
| CN105804679B (en) * | 2016-02-06 | 2018-05-08 | 高伟时 | Continuously circulating water horizontal well wellbore treatments process pipe string device is realized using plain tubing |
| CN106761549A (en) * | 2016-12-01 | 2017-05-31 | 中国石油天然气股份有限公司 | Self-balancing positive and negative bidirectional continuous circulation operation device |
| CN107218003A (en) * | 2017-07-18 | 2017-09-29 | 中国石油集团渤海钻探工程有限公司 | Coal bed gas continuous punching sandpipe string and its sand washing method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20180508 |
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| AV01 | Patent right actively abandoned |