CN208803817U - A kind of adjustable guide drilling tool in continuous pipe drilling well underground - Google Patents
A kind of adjustable guide drilling tool in continuous pipe drilling well underground Download PDFInfo
- Publication number
- CN208803817U CN208803817U CN201821379186.6U CN201821379186U CN208803817U CN 208803817 U CN208803817 U CN 208803817U CN 201821379186 U CN201821379186 U CN 201821379186U CN 208803817 U CN208803817 U CN 208803817U
- Authority
- CN
- China
- Prior art keywords
- pipe
- hole
- inner cylinder
- flexible pipe
- ball seat
- 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.)
- Active
Links
Abstract
The utility model discloses a kind of adjustable guide drilling tools in continuous pipe drilling well underground, including top connection, inner cylinder, throttle pipe, flexible pipe, piston rod, positioning ball seat, adjustment barrel, locking cylinder and lower contact；One end of the top connection is connect with the inner cylinder, and the other end is connect with the positioning ball seat；One end of the flexible pipe is connect with the inner cylinder, and the other end is connect with the locking cylinder；It is provided with a throttle pipe in the middle part of the inner cylinder, inner cylinder through-hole is circumferentially provided on the inner cylinder, is circumferentially provided with flexible pipe through-hole on the flexible pipe；Opposite sliding can occur under pressure with the inner wall of inner cylinder and flexible pipe for the throttle pipe, so that the throttle pipe is in first position and the second position；The first position are as follows: throttle pipe closes inner cylinder through-hole, and flexible pipe through-hole is in the open state；The second position are as follows: throttle pipe closes flexible pipe through-hole, and inner cylinder through-hole is in the open state.
Description
Technical field
The utility model relates to drilling equipment field more particularly to a kind of adjustable steerable drilling works in continuous pipe drilling well underground
Tool.
Background technique
Continuous pipe drilling well (Coiled Tubing Drilling, CTD) is a kind of technology that drilling well is completed using continuous pipe.
It succeeds from early 1990s.Become popular drilling well new technology in recent years, be widely used in marine and land oil field, makees
Industry range includes drilling well, well workover, complete well, pilot production oil etc..With the progress of continuous tube material and manufacturing process, especially connect
Continuous automatic welding, the progress of continuous high frequency quenching technical, so that continuous, pipe cost is greatly lowered, the service life further increases, existing
It is widely used and is possibly realized in field is a wide range of.
Continuous pipe drilling technology at home and abroad has because of the feature that its is at low cost, easy to operate, pollution is small, occupied area is narrow
Broad application prospect, which are mainly applied to Microdrillings no more than in drilling well, however due to the non-rotatable property of continuous tubing string,
Drilling tool face angle degree must be adjusted using the method for downhole orientation.
Utility model content
For overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of continuous pipe drilling well underground is adjustable
Guide drilling tool, it is adjustable to be able to achieve downhole assembly camber dynamic, meets the technology need of continuous pipe directional drilling condition
It asks.
In order to achieve the above object, technical solution used by the utility model is as follows:
A kind of adjustable guide drilling tool in continuous pipe drilling well underground, including top connection, inner cylinder, throttle pipe, flexible pipe, piston
Bar, positioning ball seat, adjustment barrel, locking cylinder and lower contact；One end of the top connection is connect with the inner cylinder, the other end with it is described
Positioning ball seat connection；One end of the flexible pipe is connect with the inner cylinder, and the other end is connect with the locking cylinder；The positioning ball
It is provided with adjustment barrel between seat and the locking cylinder, a throttle pipe is provided in the middle part of the inner cylinder, is circumferentially set on the inner cylinder
It is equipped with inner cylinder through-hole, is circumferentially provided with flexible pipe through-hole on the flexible pipe；The throttle pipe under pressure can be with inner cylinder
Opposite sliding occurs with the inner wall of flexible pipe, so that the throttle pipe is in first position and the second position；The first position
Are as follows: throttle pipe closes inner cylinder through-hole, and flexible pipe through-hole is in the open state；The second position are as follows: throttle pipe will be flexible
Pipe through-hole closing, and inner cylinder through-hole is in the open state；The inner cavity of the positioning ball seat is provided with positioning ball seat through-hole, described fixed
Axially be provided with eccentric stepped hole on the ball seat of position, be provided with a piston rod in the bias stepped hole, the piston rod with it is described
Adjustment barrel connection, the flexible pipe sequentially pass through after the positioning ball seat through-hole, the inner hole of adjustment barrel and the inner hole of locking cylinder with
The lower contact connection.
Further, the adjustable guide drilling tool in the continuous pipe drilling well underground further includes upper drilling string and lower drilling string,
The top connection and the upper drilling string screwed connection, the lower contact and the lower drilling string screwed connection.
Further, one end of the top connection and the inner cylinder screwed connection, the other end and the positioning ball seat screw thread
Connection；One end of the flexible pipe and the inner cylinder screwed connection, the other end and the locking cylinder screwed connection.
Further, it is provided with throttle pipe step surface on the throttle pipe, throttling is installed on the throttle pipe step surface
Spring, the inner cavity of the inner cylinder are provided with an inner cylinder step surface, and the inner cylinder step surface is connect with the throttle pipe.
Further, the inner cavity and positioning ball seat of the inner cavity of the inner cylinder and the top connection are connected to form the first cavity,
The inner cylinder through-hole is connected to first cavity, and the inner cavity of the flexible pipe is connected with the top connection inner cavity and positioning ball seat
The second cavity is formed, the flexibility pipe through-hole is connected to second cavity.
Further, the inner cylinder through-hole is uniformly arranged on the middle part of the inner cylinder, and the quantity of the inner cylinder through-hole is two
A, the flexibility pipe through-hole is uniformly arranged on the top of the flexible pipe, and the quantity of the flexibility pipe through-hole is two.
Further, it is provided with raised step on the piston rod, reset spring is installed in the raised step, it is described
Piston rod and reset spring are mounted in the eccentric stepped hole.
Further, it is provided with interior concave spherical surface in the adjustment barrel, outer convex spherical is provided on the positioning ball seat, it is described
Interior concave spherical surface is connected together with the outer convex spherical, and the side of the adjustment barrel is provided with a surface groove, under the piston rod
Portion is provided with an inclined-plane, and the surface groove is connected together with the inclined-plane, and the flexible pipe is bonded with the inner hole of the adjustment barrel
Connection.
Further, the flexible pipe is fitted and connected with the positioning ball seat through-hole, and the flexible pipe is by flexible material system
At.
Further, the inner cavity of the locking cylinder and the flexible pipe screwed connection, the locking cylinder and the adjustment barrel
Connection.
Compared with prior art, the utility model has the beneficial effects that:
(1) the utility model can allow flexible pipe to generate bending deformation, can realize bending angle adjustment in underground.
(2) the utility model is driven using the chock pressure difference of drilling fluid, is controlled simple and reliable.
(3) the utility model is fluid mechanical principles, and structure is simple, is suitable for the operating condition of underground complexity.
Detailed description of the invention
Specific embodiment of the present utility model is described in further detail with reference to the accompanying drawing, in which:
When Fig. 1 is a kind of adjustable guide drilling tool unused state in continuous pipe drilling well underground described in the utility model
Structural schematic diagram.
Knot when Fig. 2 is a kind of adjustable guide drilling tool bending state in continuous pipe drilling well underground described in the utility model
Structure schematic diagram.
In figure: 1- top connection, 2- inner cylinder, 3- throttle pipe, 4- flexible pipe, 5- piston rod, 6- positioning ball seat, 7- adjustment barrel,
8- locking cylinder, 9- lower contact, 21- inner cylinder through-hole, 31- throttle pipe step surface, 41- flexibility pipe through-hole, 51- reset spring, 61- are inclined
Heart stepped hole, 71- surface groove, 311- throttling spring.
Specific embodiment
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
As shown in Figs. 1-2, the adjustable guide drilling tool in a kind of continuous pipe drilling well underground, including top connection 1, inner cylinder 2, throttling
Pipe 3, flexible pipe 4, piston rod 5, positioning ball seat 6, adjustment barrel 7, locking cylinder 8 and lower contact 9；The upper end of the top connection 1 with it is upper
Portion's drill string screwed connection, the lower end of the lower contact 9 and lower drilling string screwed connection.
Specifically, screwed connection is also known as threadedly coupled, it is that pipeline and pipeline, pipeline and valve are connected by internal and external threads
It picks up and, this connection is mainly used for the connection of steel pipe, copper pipe and high pressure.
Specifically, in the middle part of the inner cavity of the top connection 1 with the top screwed connection of the inner cylinder 2, the top connection 1 it is interior
Chamber lower part and 6 screwed connection of positioning ball seat；The lower part screwed connection on the top of the flexible pipe 4 and the inner cylinder 2, institute
State flexible pipe 4 lower part and 8 screwed connection of locking cylinder；
Specifically, adjustment barrel 7 is provided between the positioning ball seat 6 and the locking cylinder 8, the middle part of the inner cylinder 2 is set
It is equipped with a throttle pipe 3, throttle pipe step surface 31 is provided on the throttle pipe 3, section is installed on the throttle pipe step surface 31
Stray bullet spring 311.
Specifically, inner cylinder through-hole 21 is circumferentially provided on the inner cylinder 2, the inner cylinder through-hole 21 is uniformly arranged on described
The middle part of inner cylinder 2, the quantity of the inner cylinder through-hole 21 are two, the inner cavity of the inner cavity of the inner cylinder 2 and the top connection 1 and calmly
Position ball seat 6 is connected to form the first cavity, and the inner cylinder through-hole 21 is connected to first cavity, the inner cavity setting of the inner cylinder 2
There is an inner cylinder step surface, the inner cylinder step surface is connect with the throttle pipe 3.
Specifically, flexible pipe through-hole 41 is circumferentially provided on the flexible pipe 4, the flexibility pipe through-hole 41 is uniformly arranged on
The quantity on the top of the flexible pipe 4, the flexibility pipe through-hole 41 is two, the inner cavity of the flexible pipe 4 and the top connection 1
Inner cavity and positioning ball seat 6 are connected to form the second cavity, and the flexibility pipe through-hole 41 is connected to second cavity.
Specifically, opposite sliding can occur under pressure with the inner wall of inner cylinder 2 and flexible pipe 4 for the throttle pipe 3, with
The throttle pipe 3 is set to be in first position and the second position, as shown in Figure 1, throttle pipe 3 is located at first position, as shown in Fig. 2,
Throttle pipe 3 is located at the second position；The first position are as follows: throttle pipe 3 closes inner cylinder through-hole 21, and at flexible pipe through-hole 41
In opening state；The second position are as follows: throttle pipe 3 closes flexible pipe through-hole 41, and inner cylinder through-hole 21 is in the open state.
Specifically, the inner cavity of the positioning ball seat 6 is provided with positioning ball seat through-hole, is axially arranged on the positioning ball seat 6
There is eccentric stepped hole 61, a piston rod 5 is provided in the bias stepped hole 61, the piston rod 5 connects with the adjustment barrel 7
Connect, the flexible pipe 4 sequentially pass through after the inner hole of the positioning ball seat through-hole, the inner hole of adjustment barrel 7 and locking cylinder 8 with it is described under
Connector 9 connects.
Specifically, it is provided with raised step on the piston rod 5, reset spring 51, institute is installed in the raised step
It states piston rod 5 and reset spring 51 is mounted in the eccentric stepped hole 61.
Specifically, it is provided with interior concave spherical surface in the adjustment barrel 7, outer convex spherical is provided on the positioning ball seat 6, it is described
Interior concave spherical surface is connected together with the outer convex spherical, and the side of the adjustment barrel 7 is provided with a surface groove 71, the piston rod 5
Lower part be provided with an inclined-plane, the surface groove 71 is connected together with the inclined-plane, the flexible pipe 4 and the adjustment barrel 7
Inner hole is fitted and connected.
Specifically, the flexible pipe 4 is fitted and connected with the positioning ball seat through-hole, and the flexible pipe 4 is by flexible material system
At flexibility refers to that object receiving force deforms, and irreplaceable property after active force loses is usually used in mineralogy, metallography
(in metallography and deposit rigidity, tensile strength etc.), flexible material includes chlorite and aluminum material and is not limited only to chlorite
And aluminum material, it further include all flexible materials.
Specifically, the inner cavity of the locking cylinder 8 and 4 screwed connection of flexible pipe, the locking cylinder 8 compress the adjusting
Cylinder 7.
The course of work of the present embodiment is as follows:
When the continuous pipe drilling well underground can tuning drilling tool tripping in design position when, if mud flow rate is smaller
When, as shown in Figure 1, the chock pressure difference effect of throttle pipe 3 is small, throttle pipe 3 is not moved in the throttling effect of spring 311, flexible
The flexible pipe through-hole 41 that the top of pipe 4 is circumferentially arranged is connected to the inner cavity of the flexible pipe 4 where piston rod 5 and the inner cavity of top connection 1
The first cavity formed with positioning ball seat 6, at this moment the intracorporal pressure of the first chamber is lower, and piston rod 5 does not occur mobile and do not occur
Bending；If mud flow rate is larger, as shown in Fig. 2, the chock pressure difference active force of throttle pipe 3 is big, throttle pipe 3 can be to moving down
Dynamic, the flexible pipe through-hole 41 of two of 4 top of flexible pipe is closed, and two inner cylinder through-holes 21 at 2 middle part of inner cylinder are opened, at this moment piston
The pressure of first cavity is high where bar 5, and piston rod 5 is pushed to move down, the slope driving adjustment barrel 7 of 5 lower end of piston rod around
Convex spherical generates tangential sliding outside 6 lower end of positioning ball seat, and adjustment barrel 7 makes flexible pipe 4 generate bending deformation, to realize underground tune
The bending angle of drill assembly is saved, and then adjusts and is oriented to, the utility model is driven using the chock pressure difference of drilling fluid, control
It makes simple and reliable, is suitable for the operating condition of underground complexity.
It will be apparent to those skilled in the art that can make various other according to the above description of the technical scheme and ideas
Corresponding change and deformation, and all these changes and deformation all should belong to the protection of the utility model claims
Within the scope of.
Claims (10)
1. a kind of adjustable guide drilling tool in continuous pipe drilling well underground, it is characterised in that: including top connection (1), inner cylinder (2), section
Flow tube (3), flexible pipe (4), piston rod (5), positioning ball seat (6), adjustment barrel (7), locking cylinder (8) and lower contact (9)；On described
One end of connector (1) is connect with the inner cylinder (2), and the other end is connect with the positioning ball seat (6)；The one of the flexible pipe (4)
End is connect with the inner cylinder (2), and the other end is connect with the locking cylinder (8)；The positioning ball seat (6) and the locking cylinder (8)
Between be provided with adjustment barrel (7), be provided with a throttle pipe (3) in the middle part of the inner cylinder (2), be circumferentially arranged on the inner cylinder (2)
Have inner cylinder through-hole (21), is circumferentially provided with flexible pipe through-hole (41) on the flexible pipe (4)；The throttle pipe (3) is made in pressure
Opposite sliding can occur with the inner wall of inner cylinder (2) and flexible pipe (4) with lower so that the throttle pipe (3) be in first position with
The second position；The first position are as follows: throttle pipe (3) closes inner cylinder through-hole (21), and flexible pipe through-hole (41) is in and opens
State；The second position are as follows: throttle pipe (3) closes flexible pipe through-hole (41), and inner cylinder through-hole (21) is in the open state；
The inner cavity of the positioning ball seat (6) is provided with positioning ball seat through-hole, is axially provided with eccentric stepped hole on the positioning ball seat (6)
(61), it being provided with a piston rod (5) in the eccentric stepped hole (61), the piston rod (5) connect with the adjustment barrel (7),
The flexible pipe (4) sequentially pass through after the inner hole of the positioning ball seat through-hole, the inner hole of adjustment barrel (7) and locking cylinder (8) with institute
State lower contact (9) connection.
2. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: further include
Upper drilling string and lower drilling string, the top connection (1) and the upper drilling string screwed connection, the lower contact (9) and it is described under
Portion's drill string screwed connection.
3. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: on described
One end of connector (1) and the inner cylinder (2) screwed connection, the other end and the positioning ball seat (6) screwed connection；The flexible pipe
(4) one end and the inner cylinder (2) screwed connection, the other end and the locking cylinder (8) screwed connection.
4. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: the section
It is provided in flow tube (3) throttle pipe step surface (31), throttling spring (311), institute is installed on the throttle pipe step surface (31)
The inner cavity for stating inner cylinder (2) is provided with an inner cylinder step surface, and the inner cylinder step surface is connect with the throttle pipe (3).
5. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: in described
The inner cavity of cylinder (2) and the inner cavity of the top connection (1) and positioning ball seat (6) are connected to form the first cavity, the inner cylinder through-hole
(21) it is connected to first cavity, inner cavity and the top connection (1) inner cavity and positioning ball seat (6) phase of the flexible pipe (4)
The second cavity is even formed, the flexibility pipe through-hole (41) is connected to second cavity.
6. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 5, it is characterised in that: in described
Cylinder through-hole (21) is uniformly arranged on the middle part of the inner cylinder (2), and the quantity of the inner cylinder through-hole (21) is two, the flexible pipe
Through-hole (41) is uniformly arranged on the top of the flexible pipe (4), and the quantity of the flexibility pipe through-hole (41) is two.
7. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: the work
It is provided with raised step on stopper rod (5), is equipped in the raised step reset spring (51), the piston rod (5) and reset
Spring (51) is mounted in the eccentric stepped hole (61).
8. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: the tune
It is provided with interior concave spherical surface on section cylinder (7), is provided with outer convex spherical on the positioning ball seat (6), the interior concave spherical surface and described outer
Convex spherical is connected together, and the side of the adjustment barrel (7) is provided with a surface groove (71), the lower part setting of the piston rod (5)
There is an inclined-plane, the surface groove is connected together with the inclined-plane, and the flexible pipe (4) is bonded with the inner hole of the adjustment barrel (7)
Connection.
9. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: described to scratch
Property pipe (4) is fitted and connected with the positioning ball seat through-hole, and the flexible pipe (4) is made of flexible material.
10. a kind of adjustable guide drilling tool in continuous pipe drilling well underground according to claim 1, it is characterised in that: described
The inner cavity of locking cylinder (8) and the flexible pipe (4) screwed connection, the locking cylinder (8) connect with the adjustment barrel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821379186.6U CN208803817U (en) | 2018-08-24 | 2018-08-24 | A kind of adjustable guide drilling tool in continuous pipe drilling well underground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821379186.6U CN208803817U (en) | 2018-08-24 | 2018-08-24 | A kind of adjustable guide drilling tool in continuous pipe drilling well underground |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208803817U true CN208803817U (en) | 2019-04-30 |
Family
ID=66235670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821379186.6U Active CN208803817U (en) | 2018-08-24 | 2018-08-24 | A kind of adjustable guide drilling tool in continuous pipe drilling well underground |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208803817U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952572A (en) * | 2018-08-24 | 2018-12-07 | 广州海洋地质调查局 | A kind of adjustable guide drilling tool in continuous pipe drilling well underground |
| CN111287659A (en) * | 2020-03-30 | 2020-06-16 | 西安石油大学 | Build-up rate adjusting method based on full-rotation directional type guiding drilling tool |
-
2018
- 2018-08-24 CN CN201821379186.6U patent/CN208803817U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952572A (en) * | 2018-08-24 | 2018-12-07 | 广州海洋地质调查局 | A kind of adjustable guide drilling tool in continuous pipe drilling well underground |
| CN111287659A (en) * | 2020-03-30 | 2020-06-16 | 西安石油大学 | Build-up rate adjusting method based on full-rotation directional type guiding drilling tool |
| CN111287659B (en) * | 2020-03-30 | 2021-09-07 | 西安石油大学 | Build-up rate adjusting method based on full-rotation directional type guiding drilling tool |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2017114149A1 (en) | Mechanical and hydraulic dual-effect expansion device for well drilling with expandable tubular technology | |
| CN208803817U (en) | A kind of adjustable guide drilling tool in continuous pipe drilling well underground | |
| CN109356832B (en) | Double-cylinder double-plug double-action valve type plug-valve integrated pump | |
| CN108952572A (en) | A kind of adjustable guide drilling tool in continuous pipe drilling well underground | |
| CN109296348B (en) | Toe end sliding sleeve capable of being opened in time delay mode | |
| CN109236234A (en) | The mechanical opening valve and its control method that control each reservoir withdrawal are produced for being remotely controlled to match | |
| CN110593803A (en) | Integrated infinite-stage fracturing packer | |
| CN215057261U (en) | Bridge type eccentric high-pressure gas lift valve | |
| CN108643838B (en) | A kind of adjustable guide drilling tool in underground | |
| CN201254952Y (en) | Automatic vertical drilling tool by utilizing aerodynamics | |
| CN2851520Y (en) | Hydraulic diameter-changeable type stabilizer | |
| CN209212155U (en) | Qinghai Ying Xi horizontal well hold angle drilling tool | |
| CN209261491U (en) | Diameter changeable drill bit | |
| CN201321840Y (en) | Constant pressure valve used for oil field well completion | |
| CN101566044A (en) | Automatic vertical well drilling tool utilizing aerodynamics | |
| CN208534455U (en) | It is a kind of for being remotely controlled the stepless opening degree valve of each reservoir withdrawal | |
| CN207795160U (en) | Gas well induced flow switch valve | |
| CN213540351U (en) | Underground intelligent gas production and drainage robot | |
| CN109441373A (en) | A kind of hydraulic control variable gauge stabilizer | |
| CN205206755U (en) | Adjustable blade formula inclinometer righting device | |
| CN209761406U (en) | underground high-pressure moving and speed control device | |
| CN201031618Y (en) | Three diameter-variable stabilizers | |
| CN205000910U (en) | But nearly drill bit righting device of reducing | |
| CN205349677U (en) | Annular plunger float buret formula oil -well pump | |
| CN205663429U (en) | Fluid pressure type sliding sleeve bleeder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |