CN203257355U - Hydraulic setting tool - Google Patents
Hydraulic setting tool Download PDFInfo
- Publication number
- CN203257355U CN203257355U CN 201320268522 CN201320268522U CN203257355U CN 203257355 U CN203257355 U CN 203257355U CN 201320268522 CN201320268522 CN 201320268522 CN 201320268522 U CN201320268522 U CN 201320268522U CN 203257355 U CN203257355 U CN 203257355U
- Authority
- CN
- China
- Prior art keywords
- cylinder sleeve
- sleeve
- piston
- center tube
- shear
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to the technical field of oil and gas well exploration equipment of oil and gas fields and in particular relates to a hydraulic setting tool. An upper shearing sleeve is hung on a core shaft through a shearing pin; an upper joint and an upper center pipe are respectively connected with the core shaft; an upper cylinder sleeve is connected with the shearing sleeve; the shearing sleeve is provided with shearing pin holes; an upper piston is connected with the upper cylinder sleeve; the upper end of a middle joint is connected with the upper center pipe, and the lower end of the middle joint is connected with a lower center pipe; a lower cylinder sleeve is connected with the upper piston; a lower piston is hung on a connection cylinder sleeve through a shearing pin; a spring is sleeved at the upper end of the lower center pipe; the connection cylinder sleeve is connected with the lower cylinder sleeve; the lower piston presses against the spring; a connection sleeve presses against the lower piston after being connected with the connection cylinder sleeve; a lower joint is connected with the lower center pipe. The hydraulic setting tool is compact and small in structure, high in passing property, large in piston area and low in setting pressure, can be backwashed, is unlikely to gather sand, can be matched with a non-pressure well for pressure construction and is particularly suitable for horizontal well construction.
Description
Technical field
The utility model relates to oil gas field oil gas water well mining equipment technical field, is specially a kind of hydraulic setting tool of not pitching.
Background technology
The oil well production process for overcoming interlayer contradiction, at utmost improves recovery ratio and takes multilayer to divide the measure of adopting, and generally uses insertion pipe packer; During the well water filling, particularly high pressure water injection is changed the envelope cycle, is improved the lasting high-voltage resistance capability of packing organ pipe string for prolongation, needs insertion pipe packer; In gas well production and the gas injection process, no matter be carbon dioxide injection or the gas injection, avoid high pressure for the protection upper sleeve, also use insertion pipe packer.Because the insertion pipe packer grappling is reliable, set and give up simply, it is convenient that intubate is changed, and the pressure-bearing heat resistance is reliable, thereby oil gas field uses in a large number at home, is particularly suitable for gas well completion and super-pressure water filling.
The secondary well cementation of producing well and the profile control of oil gas water well squeeze in the stifled construction, for the protection upper sleeve is avoided high pressure, improve simultaneously effective squeeze note amount, prevent from pouring in down a chimney after the squeeze note termination of pumping, stop to return on the mortar the solid accident in pit shaft of oil pipe that causes of solidifying, improve the safety of squeeze note construction, need to use cement retainer; In the constructions such as the conventional pressure break formation testing of Oil/gas Well, for specific stratum being taked temporarily or permanently close measure, generally carry out shutoff with bridging plug.Bridging plug has compact conformation, sealing is reliable, technical maturity, characteristics easy and simple to handle.Because of cement retainer and the simple and reliable characteristic of bridging plug, such instrument is extensively widely applied abroad at present.
In recent years, gradually groped hydraulic jet perforation pressure break well-completing process both at home and abroad, and obtained at home behind this technique gradual perfection widely applying.Technological principle is that bridging plug, hydraulic setting tool, hydraulic blast are connected successively, be conveyed into well with oil pipe or coiled tubing, first pitching is suppressed and is set bridging plug until give up behind the precalculated position, the upper lifting pipe post is aimed at the design stratum by hydraulic blast, pitching is suppressed and is opened hydraulic blast again, surface pump liquid carries out abrasive perforating, then carries out sand fracturing.After one deck construction is complete, annular space back-up sand behind the upper lifting pipe post, up perforating and fracturing successively.It is simple that this technique has technique, and workload is little, easy construction, and economical and practical characteristics, thereby adopt in a large number for domestic and international oil field.
Unconventional oil and gas development technique obtains lot of experiments the America and Europe and uses, and its technology reaches its maturity.Over the past two years, after unconventional oil and gas development technique introducing is domestic, obtains a large amount of explorations and use, according to the needs of shale gas reservoir exploitation, the normal operation composite bridge plug carries out targetedly pressing crack construction to target zone.It is simple that the composite bridge plug pressure break has technique, simple operation, and the characteristics such as short construction period are a large amount of uses of oil and gas development institute both at home and abroad.
In above-mentioned all constructions, need to use the instruments such as insertion pipe packer, conventional bridging plug, cement retainer, composite bridge plug.Oil gas field uses these downhole tools all to need special use to send the well tool matching operation in a large number both at home and abroad, and this send well tool is hydraulic setting tool.The hydraulic setting tool that uses both at home and abroad at present exists part not enough in actual use, one class is using the hydraulic setting tool circulation port on piston, easily long-pending sand and stopping up in the piston rod in the work progress, thereby lower piston actual hydraulic pressure power, cause lower bonding tool can't give up even can't set; Although another kind of hydraulic setting tool circulation port under second piston, because the limited piston area of structure is very little, is suppressed when setting the equipment requirement height is suppressed on ground, high-voltage construction is also more dangerous simultaneously; Also have a class hydraulic setting tool circulation port under the final stage piston, increase piston rod after operation pressure not high, but increased the length of instrument itself, it is relatively relatively poor to enter in the well process trafficability characteristic.All are all needing pitching with hydraulic setting tool, when connecing the construction of ejector class instrument cooperation coiled tubing on it, need to throw at least twice ball, because the coiled tubing internal diameter is less, add upslide two-stage ball, thereby upper bonding tool do not have the design space substantially.In the snubbing serving construction, at present only there be the hydraulic setting tool of a kind of circulation port on piston can cooperate construction with pressure, because there is sediment contamination inevitably in tube inner wall, tube inner wall impurity sinks when pour water in ground, lower cylinder causes into well tool and can't give up even set easily.In the horizontal well construction, often need the small displacement pumping after the pitching.When horizontal segment is longer, even in stepped horizontal wells, even pumping, ball still is difficult to take a seat sometimes, brings very large inconvenience to construction.
Therefore, normal conventional can not adapt to a large amount of site operations gradually at the hydraulic setting tool of usefulness, has a lot of potential risks in the work progress.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of lower to wellbore environment, the requirement of pit shaft medium, has more the not pitching hydraulic setting tool of practicality in practice of construction.
For realizing above-mentioned technical purpose, the scheme that the utility model provides is: a kind of hydraulic setting tool, comprise successively from top to bottom top connection, shear joint, mandrel, upper center tube, upper cylinder sleeve, upper piston, transition joint, lower center tube, lower cylinder sleeve, spring, lower piston, connection cylinder sleeve, adapter sleeve, lower contact, O type circle, shear pin, holding screw, wherein said shear sleeve is articulated on the mandrel by shear pin, and top connection is connected with mandrel with upper center tube and is connected; Upper cylinder sleeve is connected with shear sleeve, and shear sleeve is provided with shear pinhole, and upper piston is connected with upper cylinder sleeve; The upper end of transition joint is connected with upper center tube, the lower termination lower center tube of transition joint; Lower cylinder sleeve is connected with upper piston; Lower piston articulates by shear pin with being connected cylinder sleeve, and spring is placed in lower center tube upper end, connects cylinder sleeve and is connected with lower cylinder sleeve, and lower piston withstands spring, adapter sleeve be connected the cylinder sleeve connection after prop up lower piston, lower contact is connected with lower center tube.
And, described top connection and mandrel are to be threaded and seal with O ring and fixing locking with holding screw is arranged, upper center tube and mandrel are to be threaded and locking with holding screw, upper cylinder sleeve is to be threaded with shear sleeve, upper piston and upper cylinder sleeve be threaded and inside and outside seal with O ring is arranged, the upper end of transition joint is threaded with upper center tube, the lower termination lower center tube of transition joint also has seal with O ring and locking with holding screw, lower cylinder sleeve is threaded with upper piston, be provided with seal with O ring between lower piston and the adapter sleeve, connecting cylinder sleeve is to be threaded with lower cylinder sleeve, adapter sleeve is to be threaded with being connected cylinder sleeve, and lower contact and lower center tube are to be threaded and to have holding screw locking.
And described upper center tube has identical up and down screw thread with lower center tube, and connection of thread is equipped with holding screw; Described transition joint two ends screw thread is identical; Screw thread is identical up and down for described connection cylinder sleeve; Described upper piston two ends screw thread is identical.
And described screw thread is short tooth acme thread.
And the top of described upper center tube and lower center tube is equipped with the elongated inlet opening of the oval kidney-shaped in 2 ~ 4 places, and 2 ~ 4 place's reversing ports are established at the lower center tube middle part.
And O shape circle is established in described upper piston upper end, and the shearing cotter way is established in the lower end; 3 three of peripheral hardwares are O shape circle in the described lower piston, and this O shape circle is equipped with up and down the protection back band, and the shearing cotter way is established in the outside of lower piston.
And, 6 ~ 10 shear pinhole of described connection cylinder sleeve design; Described shear sleeve is provided with 4 ~ 8 shear pinhole.
And described adapter sleeve is established the uniform inlet opening in 3 ~ 6 places in the upper end, and the uniform intercommunicating pore in 3 ~ 6 places is established at its middle part.
The utility model compact conformation is short and small, trafficability characteristic is strong, and piston area is large, it is low to set pressure, can backwash, be difficult for long-pending sand, can cooperate not kill-job construction with pressure simultaneously, be particularly suitable for horizontal well construction.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the enlarged drawing of the utility model the first half.
Fig. 3 is the enlarged drawing of the utility model the latter half.
Wherein, 1, top connection, 2, O shape circle, 3, holding screw, 4, shear sleeve, 5, shear pin, 6, shear pin, 7, upper cylinder sleeve, 8, mandrel, 9, O shape circle, 10, upper piston, 11, O shape circle, 12, upper center tube, 13, O shape circle, 14, transition joint, 15, connect cylinder sleeve, 16, spring, 17, lower center tube, 18, lower piston, 19, adapter sleeve, 20, lower contact, 21, lower cylinder sleeve.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Present embodiment provides a kind of hydraulic setting tool, mainly comprises top connection 1, O shape circle 2, holding screw 3, shear sleeve 4, shear pin 5, shear pin 6, upper cylinder sleeve 7, mandrel 8, O shape circle 9, upper piston 10, O shape circle 11, upper center tube 12, O shape circle 13, transition joint 14, connects cylinder sleeve 15, spring 16, lower center tube 17, lower piston 18, adapter sleeve 19, lower contact 20, lower cylinder sleeve 21.
The lower end of the mandrel 8 O shape circle 9 of packing into, shear sleeve 4 is inserted in and installs shear pin 5 by the upper end of mandrel 8.Pack into and be connected with mandrel 8 by screw thread after O shape encloses 2 in the lower end of top connection 1, and fixing locking with holding screw 3.Upper center tube 12 is connected with mandrel 8 by screw thread, and fixing locking with holding screw 3.Upper piston 10 is packed into and is threaded with upper cylinder sleeve 7 behind the O shape circle 9,11, then is inserted in by the upper center tube lower end, and the upper cylinder sleeve 7 rear upper piston 10 that is threaded with shear sleeve 4 withstands mandrel 8 lower ends.Transition joint 14 is packed into and is threaded with upper center tube 12 after O shape encloses 9,13, and fixing locking by holding screw 3.Lower center tube 17 is threaded with transition joint 14 and is fixing locking with holding screw 3.The lower cylinder sleeve 21 O shape circle 9 rear lower cylinder sleeve 21 that is threaded with upper piston of packing into withstands transition joint 14.Spring 16 is enclosed within on the lower center tube 17.Lower piston 18 is packed into to fill in after O shape encloses 9,11 and is connected in the cylinder sleeve 15, then loads onto in the time of need packing shear pin 6 into depending on construction requirement, and conventional construction need not to install shear pin 6.Connect and to fill in from lower center tube 12 lower ends after cylinder sleeve 15 is threaded with adapter sleeve 19, and be threaded with lower cylinder sleeve 21, at this moment spring 16 by compression, adapter sleeve 19 withstands lower piston 18.Lower contact 20 is threaded with lower center tube 17, and fixing locking with holding screw 3.
Further, described top connection 1 is connected short tooth acme thread and is connected with mandrel, and it is fastening to have a holding screw, is convenient to dismounting and locking; Described shear sleeve 4 is established 6 ~ 10 (preferably 8) shear pinhole, is convenient to during resistance to shock loads Datong District adjust start set pressure; Described shear sleeve 4 articulates by shear pin with mandrel 8 and is connected with upper cylinder sleeve 7 short tooth acme threads, and shear pin is contained in the cylinder sleeve 7, prevents from scratching.
Further, described upper center tube 12, connect cylinder sleeve about in the of 15 screw thread be short tooth acme thread, the specification size is just the same; Upper piston 10 two ends screw threads are short tooth acme thread, and the specification size is just the same, and O shape circle 9,11 is established in the upper end, and the shearing cotter way is established in the lower end, and highly versatile is convenient to multi-level piston cylinder sleeve string and is used.
Further, described upper center tube thread type about in the of 12, specification size are just the same, and the upper end is locking with holding screw; The elongated inlet opening of oval kidney-shaped two places are established on top, guarantee that tensile strength increases area of passage simultaneously.
Further, described transition joint 14 two ends thread type, specification size are just the same, on to divide into holding screw locking, highly versatile can not turn upside down during assembling.
Further, described lower center tube about in the of 17 screw thread just the same, easy to process, it is the same with upper center tube 12 that inlet opening is established on its top, anti-circulation well cleanup passage is established at the middle part.
Further, establishing 3 three on the described lower piston 18 is O shape circle, and O shape circle is equipped with up and down the protection back band; The shearing cotter way is established in its outside, and described lower piston 18 integrates with spring 16 and sets and anti-circulatory function.
Further, 6 ~ 10 (preferably 8) individual shear pinhole of described connection cylinder sleeve 15 designs are adjusted shear pin quantity according to the pit shaft internal pressure in the construction of not kill-job Operating Pressure, can satisfy 50MPa pressure construction with pressure in the pit shaft when filling fully.
Further, establish preferably 4 of 3 ~ 6(in described adapter sleeve 19 upper ends) locate uniform inlet opening, be communicated with the backwash passage as oil jacket, play simultaneously centralizing function; Preferably 4 of 3 ~ 6(are established at adapter sleeve 19 middle parts) locate uniform intercommunicating pore, prevent from down connecing that to set between joint bag and setting sleeve annular clearance too small and cause that circulation is not smooth, intercommunicating pore forms circulation canal on setting sleeve simultaneously, prevents setting sleeve inner product sand in the well process.
The utility model is provided with two hydraulic cylinders and two pistons, and compact conformation is short and small, and trafficability characteristic is strong.When special hole condition requires to set pressure when extremely low, can be directly 14 times series connection of transition joint upper center tube 12, upper piston, transition joint 14 and on cylinder sleeve 7, thereby reduce operation pressure after increasing the first stage piston cylinder.6 ~ 10 (preferably 8) shear pinhole in the shear sleeve 4 can rationally be adjusted and initially set pressure, improve the anti-percussion drill drilling string not well braked ability of instrument, the unexpected premature setting probability of reduction instrument.Lower piston 18 integrated anti-circulatory functions are served as reverse circulation valve during anti-flushing well, suppress to serve as when setting to set piston; Do not fill shear pin in the conventional construction, construction period oil jacket connection can not block in the back-washable assurance plunger shaft; In the construction with pressure, adjust pin number on the lower piston 18 according to the pit shaft internal pressure, enter in the well process the obstructed assurance construction of oil jacket and carry out smoothly, can play the casing pressure backwash after instrument puts in place, hydraulic cylinder is not blocked when guaranteeing to set.Need not pitching in the construction, be particularly suitable for horizontal well construction and cooperate the coiled tubing construction.Special circulation port design on the adapter sleeve 19, in the construction setting tool inner chamber and under connect and set joint bag inner chamber, enter well tool top and can not amass sand, less demanding to medium in drilling mud, the pit shaft, tube inner wall cleanliness factor.Improve on the whole the general compliance to all kinds of constructions of various abominable hole condition.
The above only is preferred embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvement or distortion, these improvement or distortion also should be considered as protection domain of the present utility model.
Claims (8)
1. hydraulic setting tool, comprise successively from top to bottom top connection, shear joint, mandrel, upper center tube, upper cylinder sleeve, upper piston, transition joint, lower center tube, lower cylinder sleeve, spring, lower piston, connection cylinder sleeve, adapter sleeve, lower contact, O type circle, shear pin, holding screw, it is characterized in that: described shear sleeve is articulated on the mandrel by shear pin, and top connection is connected with mandrel with upper center tube and is connected; Upper cylinder sleeve is connected with shear sleeve, and shear sleeve is provided with shear pinhole, and upper piston is connected with upper cylinder sleeve; The upper end of transition joint is connected with upper center tube, the lower termination lower center tube of transition joint; Lower cylinder sleeve is connected with upper piston; Lower piston articulates by shear pin with being connected cylinder sleeve, and spring is placed in lower center tube upper end, connects cylinder sleeve and is connected with lower cylinder sleeve, and lower piston withstands spring, adapter sleeve be connected the cylinder sleeve connection after prop up lower piston, lower contact is connected with lower center tube.
2. a kind of hydraulic setting tool according to claim 1, it is characterized in that: described top connection and mandrel are to be threaded and seal with O ring and fixing locking with holding screw is arranged, upper center tube and mandrel are to be threaded and locking with holding screw, upper cylinder sleeve is to be threaded with shear sleeve, upper piston and upper cylinder sleeve be threaded and inside and outside seal with O ring is arranged, the upper end of transition joint is threaded with upper center tube, the lower termination lower center tube of transition joint also has seal with O ring and locking with holding screw, lower cylinder sleeve is threaded with upper piston, be provided with seal with O ring between lower piston and the adapter sleeve, connecting cylinder sleeve is to be threaded with lower cylinder sleeve, adapter sleeve is to be threaded with being connected cylinder sleeve, and lower contact and lower center tube are to be threaded and to have holding screw locking.
3. a kind of hydraulic setting tool according to claim 1 and 2, it is characterized in that: described upper center tube has identical up and down screw thread with lower center tube, and connection of thread is equipped with holding screw; Described transition joint two ends screw thread is identical; Screw thread is identical up and down for described connection cylinder sleeve; Described upper piston two ends screw thread is identical.
4. a kind of hydraulic setting tool according to claim 3, it is characterized in that: described screw thread is short tooth acme thread.
5. a kind of hydraulic setting tool according to claim 1 is characterized in that: the top of described upper center tube and lower center tube is equipped with the elongated inlet opening of the oval kidney-shaped in 2 ~ 4 places, and 2 ~ 4 place's reversing ports are established at the lower center tube middle part.
6. a kind of hydraulic setting tool according to claim 1 is characterized in that: O shape circle is established in described upper piston upper end, and the shearing cotter way is established in the lower end; 3 three of peripheral hardwares are O shape circle in the described lower piston, and this O shape circle is equipped with up and down the protection back band, and the shearing cotter way is established in the outside of lower piston.
7. a kind of hydraulic setting tool according to claim 1 is characterized in that: 6 ~ 10 shear pinhole of described connection cylinder sleeve design; Described shear sleeve is provided with 4 ~ 8 shear pinhole.
8. a kind of hydraulic setting tool according to claim 1 is characterized in that: establish the uniform inlet opening in 3 ~ 6 places on the described adapter sleeve, establish the uniform intercommunicating pore in 3 ~ 6 places in the middle part of it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268522 CN203257355U (en) | 2013-05-17 | 2013-05-17 | Hydraulic setting tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268522 CN203257355U (en) | 2013-05-17 | 2013-05-17 | Hydraulic setting tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203257355U true CN203257355U (en) | 2013-10-30 |
Family
ID=49469932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320268522 Withdrawn - After Issue CN203257355U (en) | 2013-05-17 | 2013-05-17 | Hydraulic setting tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203257355U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277061A (en) * | 2013-05-17 | 2013-09-04 | 四机赛瓦石油钻采设备有限公司 | Hydraulic setting tool |
| CN106837227A (en) * | 2017-03-27 | 2017-06-13 | 成都市中油石油钻采物资有限公司 | Underground static pressure energy electric setting instrument |
| RU2726681C1 (en) * | 2019-09-30 | 2020-07-15 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Setting device |
-
2013
- 2013-05-17 CN CN 201320268522 patent/CN203257355U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277061A (en) * | 2013-05-17 | 2013-09-04 | 四机赛瓦石油钻采设备有限公司 | Hydraulic setting tool |
| CN103277061B (en) * | 2013-05-17 | 2016-04-13 | 四机赛瓦石油钻采设备有限公司 | A kind of hydraulic setting tool |
| CN106837227A (en) * | 2017-03-27 | 2017-06-13 | 成都市中油石油钻采物资有限公司 | Underground static pressure energy electric setting instrument |
| RU2726681C1 (en) * | 2019-09-30 | 2020-07-15 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Setting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103277061B (en) | A kind of hydraulic setting tool | |
| CN101539007B (en) | Abrasive jetting device and method for abrasive jetting flow and jetting perforation and multiple fracturing | |
| CN201031662Y (en) | Down-hole controllable type boring tool by-pass valve | |
| WO2017000622A1 (en) | Storage-type precise quantitative injection system for injection of underground oil or gas well operating agent and injection method thereof | |
| CN112814640B (en) | Multilayer pressured fracturing operation device for medium-low pressure well and application method | |
| CN206554847U (en) | Compound force expansion pipe device | |
| CN205063914U (en) | Perforation, sand control, lose rifle integration completion pipe string | |
| CN203257355U (en) | Hydraulic setting tool | |
| CN109025875B (en) | Hydraulic differential mechanism with built-in steel balls | |
| CN201386510Y (en) | Hydraumatic self- sealed self-locking window-opening integrated whipstock | |
| CN106703732A (en) | Device for applying force on expansion pipe in a combined mode and operating method of device | |
| CN201486538U (en) | Sand prevention pipe string used for open-hole well completion of side-drilled multilateral well and plug-in type acid cleaning filling inner pipe string thereof | |
| CN206439026U (en) | One-way removable bridge plug | |
| CN202500522U (en) | Hydraulic setting tool | |
| CN1563663A (en) | Technique for plugging high penetrative water-yielding stratum in oil well by using superfine cement | |
| CN201424934Y (en) | Hydraulic releasing cement squeezing tool | |
| CN2888063Y (en) | Integrated bridge plug squeeze cementing tool | |
| CN201092845Y (en) | Hydraulic pressure, double back-off hand type dragable bridge plug | |
| CN201059181Y (en) | Fracturing sand-proof packing tool | |
| CN107542422A (en) | The milling method and combined type junk mill and application method of different hole diameters | |
| CN207111019U (en) | Combined type junk mill for different hole diameters | |
| CN206129222U (en) | Recoverable anchoring formula hydraulic pressure packer | |
| CN105298443A (en) | Oil pipe float valve and blowout prevention, gas lift and fracture combined operation method for underbalance well completion oil pipe descending | |
| CN206554872U (en) | A kind of pitching builds the pressure device and the well shaft fixing technology tubing string with the device | |
| CN201546667U (en) | Multifunctional oil pipe bridge plug |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |