CN106050218A - Annulus testing well head device for operation under pressure - Google Patents
Annulus testing well head device for operation under pressure Download PDFInfo
- Publication number
- CN106050218A CN106050218A CN201610559280.9A CN201610559280A CN106050218A CN 106050218 A CN106050218 A CN 106050218A CN 201610559280 A CN201610559280 A CN 201610559280A CN 106050218 A CN106050218 A CN 106050218A
- Authority
- CN
- China
- Prior art keywords
- core
- tube
- outside
- hole
- turning
- 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.)
- Granted
Links
Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
Abstract
The invention relates to the technical field of devices for testing under pressure, in particular to an annulus testing well head device for operation under pressure. The annulus testing well head device for operation under pressure comprises a connecting shell and a double-tube rotating core. The inner side of the lower portion of the connecting shell is provided with an inner annular convex block. The outer side of the lower portion of the double-tube rotating core is provided with an outer concave platform corresponding to the inner annular convex block in an inside-outside mode. A double-tube rotating core base above the outer concave platform is located on the inner annular convex block. The outer side of the double-tube rotating core and the inner side of the connecting shell are installed together in a sealing mode. The upper end of the double-tube rotating core is located above the connecting shell. A rotating core flange capable of preventing the double-tube rotating core from moving upwards is fixedly installed on the connecting shell. The annulus testing well head device for operation under pressure is reasonable and compact in structure and convenient to use; under a pressure state, a plug can be thrown into an oil tube, a blowout preventer can be installed, and a tubing string can be dismounted, so that production tools such as the tubing string are conveniently maintained in the later period; and later maintenance in a well-killing mode is not needed, so that the damage of well killing to an oil-displacement effect is avoided, and an oil reservoir is effectively protected.
Description
Technical field
The present invention relates to pressure test device technique field, be a kind of Operating Pressure annulus logging wellhead assembly.
Background technology
Along with constantly improving and development of underground work technology, the well workover mode of Operating Pressure has become as following down-hole and makees
The developing direction of industry.The chemical flooding low for some strata pressures or combination flooding process exploitation block are not suitable for by kill-job operation
For implementing the hole condition controlled, Operating Pressure more highlights its superiority and necessity, and the annular space of current Oil Field application is surveyed
Although examination rig tool disclosure satisfy that the operation functions such as test and the oil pumping of routine, but in the maintenance (dimension of drilling tool in later stage
Protect, such as the maintenance etc. of tubing string, oil well pump) can only be realized by conventional kill-job operating type, kill-job has not only broken up drives
The effect of oil, and oil reservoir is produced certain impact.
Summary of the invention
The invention provides a kind of Operating Pressure annulus logging wellhead assembly, overcome the deficiency of above-mentioned prior art, its
Can effectively solve the problem that existing annulus logging rig tool needs present in the later maintenance process to carry out kill-job operation.
The technical scheme is that and realized by following measures: a kind of Operating Pressure annulus logging wellhead assembly,
Including connecting housing and two-tube turning core, there is annular projection, at the two-tube lower outside turning core in the lower inside connecting housing
Having the outer concave station corresponding with inside and outside annular projection, the two-tube core print seat that turns above outer concave station, on annular projection, two-tube turns core
Outside be installed together with the inner seal being connected housing, the two-tube upper end turning core be positioned at connect housing top, connect
Be installed with on housing can prevent two-tube turn move on core turn core flange, turn on core from left and there is up/down perforation on the right side two-tube
Looped pipeline hole and supervisor hole, be installed with plug valve in looped pipeline hole, is installed with aligning packing box in supervisor hole.
Further optimization and/or improvements to foregoing invention technical scheme are presented herein below:
At least one radial direction through hole is circumferentially arranged at the top of above-mentioned connection housing, two-tube turn have on core with in radial direction through hole
The radial slot of outer correspondence, is sealed and installed with jackscrew in radial direction through hole, and the inner of jackscrew holds out against in radial slot.
The lower outside of above-mentioned annular projection is fixed with interior projection, above annular projection and between outer concave station top
Form installation cavity, bearing is installed in installation cavity, two-tube turn limited location on core corresponding with inside and outside annular projection top
Blind hole, is installed with stop screw in spacing blind hole, and the outer end seat of stop screw is on the top of interior projection.
Circumferentially there is at least one radially discharge orifice at the above-mentioned two-tube middle part turning core, has and footpath at the middle part connecting housing
Radially fixed hole corresponding inside and outside discharge orifice, is installed with relief tube in radially fixed hole.
Above-mentioned two-tube turn outside core turn core flange sealing ring together with connecting and being installed with at least between housing,
Sealing ring together with being installed with at least between the inner side turning core flange outside the two-tube upper end turning core, on radial direction discharge orifice
Sealing ring together with being installed with at least between the two-tube outside turning core and the inner side connecting housing of side, radial direction discharge orifice with
Sealing ring together with being installed with at least between the two-tube outside turning core and the inner side of connection housing between bearing, the most recessed
The bottom of platform sealing ring together with being installed with at least between inside interior projection.
The above-mentioned two-tube outside that turn core adjacent with turning core flange has in interior outside lower skewed spacing frustum, turns core method
Orchid is stuck in the top of spacing frustum, turns core flange and is fixedly installed togather by screw bolt and nut with being connected housing, is connecting shell
The lower end outside of body is fixed with connecting plate, is circumferentially intervally distributed with connecting hole on connecting plate, and plug valve is solid by articulation
Dingan County is contained on looped pipeline hole, is installed with union on plug valve.
Present configuration is reasonable and compact, easy to use, and it can be carried out oil pipe throwing and block up, install and prevent under band pressure condition
Spray apparatus and lower oil tube post, it is simple to the tools of production such as tubing string are carried out later maintenance, it is not necessary to use kill-job mode to carry out the later stage
Safeguard, thus avoid the kill-job destruction to oil displacement efficiency, be effectively protected oil reservoir.
Accompanying drawing explanation
Accompanying drawing 1 is that the master of preferred embodiment regards broken section structural representation.
It is to connect housing that coding in accompanying drawing is respectively as follows: 1, and 2 is the two-tube core that turns, and 3 is annular projection, and 4 for turning core flange,
5 is looped pipeline hole, and 6 is supervisor hole, and 7 is plug valve, and 8 is aligning packing box, and 9 is jackscrew, and 10 is interior projection, and 11 is bearing, and 12 are
Stop screw, 13 is radial direction discharge orifice, and 14 is relief tube, and 15 is sealing ring, and 16 is articulation, and 17 is union, and 18 is connecting hole, 19
For connecting plate, 20 is late gate, and 21 is spacing frustum.
Detailed description of the invention
The present invention is not limited by following embodiment, can determine specifically according to technical scheme and practical situation
Embodiment.
In the present invention, for the ease of describing, the description of the relative position relation of each parts is all according to Figure of description 1
Butut mode be described, such as: the position relationship of forward and backward, upper and lower, left and right etc. is based on the cloth of Figure of description 1
Figure direction determines.
Below in conjunction with embodiment and accompanying drawing, the invention will be further described:
As shown in Figure 1, this Operating Pressure annulus logging wellhead assembly includes connecting housing 1 and two-tube turning core 2, is connecting housing
The lower inside of 1 has annular projection 3, has corresponding with inside and outside annular projection 3 outer recessed at the two-tube lower outside turning core 2
Platform, two-tube 2, the core that turns above outer concave station is on annular projection 3, and the two-tube outside turning core 2 is close with the inner side being connected housing 1
Envelope is installed together, and the two-tube upper end turning core 2 is positioned at the top connecting housing 1, is installed with connecting and can prevent on housing 1
Two-tube turn move on core 2 turn core flange 4, have looped pipeline hole 5 and the supervisor hole 6 of up/down perforation on core 2 from the left and right side two-tube turning,
Looped pipeline hole 5 is installed with plug valve 7, is installed with aligning packing box 8 in supervisor hole 6.During using the present invention,
Oil pipe can be carried out and throws stifled, installation preventer and lower oil tube post, it is simple to the tools of production such as tubing string are entered under band pressure condition
Row later maintenance, it is not necessary to use kill-job mode to carry out later maintenance, thus avoid the kill-job destruction to oil displacement efficiency, effectively
Protect oil reservoir.Aligning packing box 8 is existing known technology.
According to actual needs above-mentioned Operating Pressure annulus logging wellhead assembly can be made further optimization and/or improvements:
As shown in Figure 1, circumferentially there is at least one radial direction through hole on the top connecting housing 1, have on core 2 two-tube turning
The radial slot corresponding with inside and outside radial direction through hole, is sealed and installed with jackscrew 9 in radial direction through hole, and the inner of jackscrew 9 holds out against radially
In groove.Jackscrew 9 has further position-limiting action to the two-tube core 2 that turns, and carries out Operating Pressure for the present invention and contributes.
As shown in Figure 1, the lower outside at annular projection 3 is fixed with interior projection 10, above annular projection 3 with
Form installation cavity between outer concave station top, bearing 11 is installed in installation cavity, corresponding with inside and outside annular projection 3 top
Two-tube turn limited location blind hole on core 2, in spacing blind hole, be installed with stop screw 12, including the outer end seat of stop screw 12
The top of projection 10.Stop screw 12 can upper carry two-tube turn core 2 time, smoothly bearing 11 is taken out of together, it is simple to bearing
11 safeguard, further ensure being smoothed out of later maintenance operation.
As shown in Figure 1, circumferentially there is at least one radially discharge orifice 13 at the two-tube middle part turning core 2, connecting shell
There is the radially fixed hole corresponding with inside and outside radially discharge orifice 13 at the middle part of body 1, is installed with relief tube 14 in radially fixed hole.
As shown in Figure 1, two-tube turn outside core 2 turn core flange 4 and be connected housing and be installed with at least one between 1
The sealing ring 15 in road, close together with being installed with at least between the inner side turning core flange 4 outside the two-tube upper end turning core 2
Seal 15, two-tube the turning above radial direction discharge orifice 13 is installed with at least one between the outside of core 2 and the inner side being connected housing 1
The sealing ring 15 in road, two-tube the turning between radial direction discharge orifice 13 with bearing 11 is consolidated between the outside of core 2 and the inner side being connected housing 1
Dingan County equipped with at least one sealing ring 15, the bottom of concave station is together with being installed with at least between inside interior projection 10 outside
Sealing ring 15.The setting of sealing ring 15 ensure that present invention sealing property during Operating Pressure.
As shown in Figure 1, have in outside lower skewed limit interior in the two-tube outside turning core 2 adjacent with turning core flange 4
Position frustum 21, turns core flange 4 and is stuck in the top of spacing frustum 21, turns core flange 4 and is connected housing and 1 is fixed by screw bolt and nut
It is installed together, is fixed with connecting plate 19 at the lower end outside connecting housing 1, the circumferentially company of being intervally distributed with on connecting plate 19
Connecing hole 18, plug valve 7 is fixedly mounted on looped pipeline hole 5 by articulation 16, is installed with union 17 on plug valve 7.Turn
When core flange 4 is stuck on spacing frustum 21, it is possible to prevent two-tube turning from moving on core 2.
Above technical characteristic constitutes highly preferred embodiment of the present invention, and it has stronger adaptability and most preferably implements effect
Really, non-essential technical characteristic can be increased and decreased according to actual needs, meet the demand of different situations.
The use process of preferred embodiment: the present invention is linked together with aboveground instrument by connecting plate 19,
When normally producing, supervisor installs tubing string in hole 6, hangs oil well pump and recover the oil under tubing string, and looped pipeline hole 5 can enter to test work down
Tool, testing tool carries out dynamic monitoring to the factor such as wellbore annulus pressure and medium, needs under in production status to implement with pressure
During operation, putting into tubing plug and complete oil pipe and throw stifled in tubing string, after cut-out tap valve 7, dismounting turns core flange 4 and turns core
The instrument of flange more than 4, then, is connected double ram type preventer, is prevented by fixed installation eccentric crossover flange on housing 1 connecting
Jet pipe and operation device under pressure, then unclamp jackscrew 9, above carries and two-tube turns core 2 and tubing string and the instrument being connected with tubing string,
Two-tube turn core 2 and tubing string and the instrument that is connected with tubing string is safeguarded to above carry, and then, carry out Operating Pressure,
After completing Operating Pressure, first transferring tubing string, to turn core 2 setting connecting in housing 1 by two-tube, tightens jackscrew 9, dismantles work with pressure
Industry device, by turning core flange 4 and turning the instrument of core flange more than 4 and be fixedly mounted on connection housing 1, resumes production.Such as accompanying drawing 1
Shown in, after late gate 20 dextrorotation at aligning packing box 8 rear portion turn 90 degrees, rotate the right part to aligning packing box 8.
Claims (10)
1. an Operating Pressure annulus logging wellhead assembly, it is characterised in that include connecting housing and two-tube turning core, is connecting shell
The lower inside of body has annular projection, has the outer concave station corresponding with inside and outside annular projection at the two-tube lower outside turning core,
The two-tube core print seat that turns above outer concave station is on annular projection, and the two-tube outside turning core is arranged on the inner seal being connected housing
Together, the two-tube upper end turning core is positioned at the top connecting housing, can prevent two-tube turning on core connecting to be installed with on housing
That moves turns core flange, has looped pipeline hole and the supervisor hole of up/down perforation from the left and right side two-tube turning, fixedly mount in looped pipeline hole on core
There is plug valve, be installed with aligning packing box in supervisor hole.
Operating Pressure annulus logging wellhead assembly the most according to claim 1, it is characterised in that connect the edge, top of housing
Circle distribution has at least one radial direction through hole, has the radial slot corresponding with inside and outside radial direction through hole two-tube turning on core, the most logical
Being sealed and installed with jackscrew in hole, the inner of jackscrew holds out against in radial slot.
Operating Pressure annulus logging wellhead assembly the most according to claim 1 and 2, it is characterised in that under annular projection
It is fixed with interior projection outside portion, forms installation cavity above annular projection and between outer concave station top, install in installation cavity
There is bearing, two-tube turn limited location blind hole on core corresponding with inside and outside annular projection top, fixedly mount in spacing blind hole
Limited location screw, the outer end seat of stop screw is on the top of interior projection.
Operating Pressure annulus logging wellhead assembly the most according to claim 1 and 2, it is characterised in that the two-tube middle part turning core
Circumferentially there is at least one radially discharge orifice, have at the middle part connecting housing corresponding with inside and outside radial direction discharge orifice radially fixed
Hole, is installed with relief tube in radially fixed hole.
Operating Pressure annulus logging wellhead assembly the most according to claim 3, it is characterised in that the two-tube edge, middle part turning core
Circle distribution has at least one radially discharge orifice, has the radially fixed hole corresponding with inside and outside radially discharge orifice at the middle part connecting housing,
It is installed with relief tube in radially fixed hole.
Operating Pressure annulus logging wellhead assembly the most according to claim 4, it is characterised in that two-tube turn outside core turn
Core flange sealing ring together with connecting and being installed with at least between housing, outside the two-tube upper end turning core with turn core flange
Inner side between be installed with at least one sealing ring, two-tube above radial direction discharge orifice turns the outside of core and is connected housing
Inner side between be installed with at least one sealing ring, the two-tube outside turning core between radial direction discharge orifice and bearing and company
Be installed with the sealing ring of at least one between the inner side of body contact body, outside inside the bottom of concave station and interior projection between fixing
The sealing ring of at least one is installed.
Operating Pressure annulus logging wellhead assembly the most according to claim 5, it is characterised in that two-tube turn outside core turn
Core flange sealing ring together with connecting and being installed with at least between housing, outside the two-tube upper end turning core with turn core flange
Inner side between be installed with at least one sealing ring, two-tube above radial direction discharge orifice turns the outside of core and is connected housing
Inner side between be installed with at least one sealing ring, the two-tube outside turning core between radial direction discharge orifice and bearing and company
Be installed with the sealing ring of at least one between the inner side of body contact body, outside inside the bottom of concave station and interior projection between fixing
The sealing ring of at least one is installed.
Operating Pressure annulus logging wellhead assembly the most according to claim 1 and 2, it is characterised in that adjacent with turning core flange
The two-tube outside turning core have in interior outside lower skewed spacing frustum, turn core flange and be stuck in the top of spacing frustum, turn core
Flange is fixedly installed togather by screw bolt and nut with being connected housing, is fixed with connecting plate at the lower end outside connecting housing,
Circumferentially being intervally distributed with connecting hole on connecting plate, plug valve is fixedly mounted on looped pipeline hole by articulation, at plug valve
On be installed with union.
Operating Pressure annulus logging wellhead assembly the most according to claim 3, it is characterised in that adjacent with turning core flange
The two-tube outside turning core has in interior outside lower skewed spacing frustum, turns core flange and is stuck in the top of spacing frustum, turns core method
Blue be connected housing and be fixedly installed togather by screw bolt and nut, the lower end outside at connection housing is fixed with connecting plate,
Circumferentially being intervally distributed with connecting hole on connecting plate, plug valve is fixedly mounted on looped pipeline hole by articulation, on plug valve
It is installed with union.
Operating Pressure annulus logging wellhead assembly the most according to claim 7, it is characterised in that adjacent with turning core flange
The two-tube outside turning core has in interior outside lower skewed spacing frustum, turns core flange and is stuck in the top of spacing frustum, turns core method
Blue be connected housing and be fixedly installed togather by screw bolt and nut, the lower end outside at connection housing is fixed with connecting plate,
Circumferentially being intervally distributed with connecting hole on connecting plate, plug valve is fixedly mounted on looped pipeline hole by articulation, on plug valve
It is installed with union.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610559280.9A CN106050218B (en) | 2016-07-15 | 2016-07-15 | Annulus testing wellhead device for operation under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610559280.9A CN106050218B (en) | 2016-07-15 | 2016-07-15 | Annulus testing wellhead device for operation under pressure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106050218A true CN106050218A (en) | 2016-10-26 |
| CN106050218B CN106050218B (en) | 2023-04-07 |
Family
ID=57187835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610559280.9A Active CN106050218B (en) | 2016-07-15 | 2016-07-15 | Annulus testing wellhead device for operation under pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106050218B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030226666A1 (en) * | 2002-06-05 | 2003-12-11 | Fenton Stephen P. | Tubing annulus valve |
| CN2665354Y (en) * | 2001-05-17 | 2004-12-22 | 新疆石油管理局采油工艺研究院 | Dual tubing heat extraction wellhead |
| CN101761323A (en) * | 2009-12-29 | 2010-06-30 | 中国石油天然气集团公司 | Alliance method of oil well perforation, fracturing and snubbing transferring pumping |
| CN102322241A (en) * | 2011-06-02 | 2012-01-18 | 中国海洋石油总公司 | Special well head device for formation test of oil and gas wells |
| CN202125283U (en) * | 2011-06-17 | 2012-01-25 | 山东普瑞思德石油技术有限公司 | High-pressure filling type rotary sliding well head |
| CN205259994U (en) * | 2016-01-08 | 2016-05-25 | 袁虎成 | Annular testing wellhead assembly |
| CN205805531U (en) * | 2016-07-15 | 2016-12-14 | 中国石油天然气集团公司 | Operating Pressure annulus logging wellhead assembly |
-
2016
- 2016-07-15 CN CN201610559280.9A patent/CN106050218B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665354Y (en) * | 2001-05-17 | 2004-12-22 | 新疆石油管理局采油工艺研究院 | Dual tubing heat extraction wellhead |
| US20030226666A1 (en) * | 2002-06-05 | 2003-12-11 | Fenton Stephen P. | Tubing annulus valve |
| CN101761323A (en) * | 2009-12-29 | 2010-06-30 | 中国石油天然气集团公司 | Alliance method of oil well perforation, fracturing and snubbing transferring pumping |
| CN102322241A (en) * | 2011-06-02 | 2012-01-18 | 中国海洋石油总公司 | Special well head device for formation test of oil and gas wells |
| CN202125283U (en) * | 2011-06-17 | 2012-01-25 | 山东普瑞思德石油技术有限公司 | High-pressure filling type rotary sliding well head |
| CN205259994U (en) * | 2016-01-08 | 2016-05-25 | 袁虎成 | Annular testing wellhead assembly |
| CN205805531U (en) * | 2016-07-15 | 2016-12-14 | 中国石油天然气集团公司 | Operating Pressure annulus logging wellhead assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106050218B (en) | 2023-04-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8740174B2 (en) | Dual-direction ram-type blowout preventer seal | |
| US7165610B2 (en) | Removable seal | |
| CN101718181B (en) | Lifting valve type underground inside-outside integrated blowout preventer | |
| US20100139910A1 (en) | Annulus isolation valve | |
| CN102817575B (en) | Downhole blow-out preventer with automatic controlling and anchoring function | |
| CN105658905A (en) | Intensifier ram blowout preventer | |
| CN207080207U (en) | A kind of oil field is every excavating technology tubing string | |
| CN101748984B (en) | Automatically controlled well blowout preventer mounted in drilling column | |
| CN202165038U (en) | Tool for fault treatment of underground safety valve | |
| CN105822251A (en) | Motor-driven extrusion-type underground annular blowout preventer and communication method thereof | |
| CN205805531U (en) | Operating Pressure annulus logging wellhead assembly | |
| CN110306947A (en) | A kind of temporary block apparatus after the pressure suitable for oil/gas well in pit shaft and temporarily block up construction method | |
| CN107503680B (en) | Ground large-diameter rapid drilling equipment and method thereof | |
| CN103590765B (en) | Oil/gas Well under-pressure operation well head breakout device | |
| CN106050218A (en) | Annulus testing well head device for operation under pressure | |
| CN212718106U (en) | Manual hydraulic integrated gate valve | |
| CN105298443A (en) | Oil pipe float valve and blowout prevention, gas lift and fracture combined operation method for underbalance well completion oil pipe descending | |
| US6745842B2 (en) | Concentric casing jack | |
| CN205532532U (en) | Water injection mandrel that casing patching well was used | |
| CN203321418U (en) | Near-bit downhole blowout preventer | |
| CN219220355U (en) | Aerated microbubble drilling equipment | |
| CN201318148Y (en) | Manual double ram blowout preventer | |
| CN212716501U (en) | Drilling fluid circulating valve group device | |
| CN114320227B (en) | Full latus rectum pressure ball seat that passes after can shearing | |
| CN219826782U (en) | Underground bridge plug tool |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |