CN103410468B - Motive seal device for expansion pipe - Google Patents
Motive seal device for expansion pipe Download PDFInfo
- Publication number
- CN103410468B CN103410468B CN201310283733.6A CN201310283733A CN103410468B CN 103410468 B CN103410468 B CN 103410468B CN 201310283733 A CN201310283733 A CN 201310283733A CN 103410468 B CN103410468 B CN 103410468B
- Authority
- CN
- China
- Prior art keywords
- packing unit
- overcoat
- seal device
- annular
- expansion pipe
- 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
Landscapes
- Gasket Seals (AREA)
Abstract
The invention discloses a kind of motive seal device for expansion pipe, comprise the connection overcoat (1) of tubular, connect the packing unit (2) that overcoat (1) internal fixtion is connected with tubular, the lateral wall of packing unit (2) is tightly connected with the inside wall being connected overcoat (1), is provided with the cavity (21) for inflating in packing unit (2).This motive seal device for expansion pipe can stop foreign matter in well to enter expansion construction tool, to make in work progress expansion tube and suppress oil pipe annular space to keep clean, thus the carrying out smoothly of construction of guaranteeing to expand.
Description
Technical field
The present invention relates to oil exploration equipment field, dynamic sealing device when particularly a kind of expansion tube is in the oil industry constructed.
Background technology
Bulged tube technology is the new technology be surging forward in recent years, and it can be applicable to drilling well, completion and the operation process such as oil recovery, well workover.Expansion tube expansion process is the process of body flow harden, expansion fashion has mechanical type, fluid pressure type etc., the conventional expansion pipe tool of current use, when the underground workings such as serious sand output well or heavy oil wells are comparatively severe, are difficult to the surface cleaning ensureing swollen cone workspace in especially long section expansion tube construction operation process, jam easily occurs, hinder carrying out smoothly of expansion, even cause constructing unsuccessfully.
Summary of the invention
In order to solve the impact of foreign matter of the prior art on construction of expanding, the invention provides a kind of motive seal device for expansion pipe, this motive seal device for expansion pipe can stop foreign matter in well to enter expansion construction tool, to make in work progress expansion tube and suppress oil pipe annular space to keep clean, thus the carrying out smoothly of construction of guaranteeing to expand.
The present invention is the technical scheme solving the employing of its technical problem: a kind of motive seal device for expansion pipe, comprise the connection overcoat of tubular, connect the packing unit that overcoat internal fixtion is connected with tubular, the lateral wall of packing unit is tightly connected with the inside wall being connected overcoat, is provided with the cavity for inflating in packing unit.
The interior side-wall surface of packing unit is provided with multiple annular projection, forms annular groove between two adjacent annular projections.
The interior side-wall surface of packing unit is provided with three annular projections, and the interior side-wall surface of packing unit forms two annular grooves.
Annular projection is projected as circular arc the longitudinal section through connection overcoat axis, and the central angle corresponding to this circular arc is less than 180 °, and the size and shape of three annular projections is all identical, and the size and shape of two annular grooves is all identical.
In cavity, annular groove position is provided with multiple brace, and the inside wall of packing unit is connected with the lateral wall of packing unit by brace, is provided with space between two adjacent braces.
At annular groove place, the inner surface of packing unit inside wall is fixedly connected with metal ring, and metal ring equals annular groove in connection overcoat length axially in connection overcoat length axially; Or at annular groove place, the external surface of packing unit inside wall is fixedly connected with metal ring, metal ring equals annular groove in connection overcoat length axially in connection overcoat length axially.
When the external surface of packing unit inside wall is fixedly connected with metal ring, the outer circumference of metal ring is fixedly connected with packing unit, and the surface of the inside circumference of metal ring is provided with rubber layer.
The two ends of packing unit are fixedly connected with the two ends being connected overcoat respectively by dog screw, and the one end connecting overcoat is also provided with the connection end cap of annular.
The lateral wall of packing unit is provided with the valve for inflating, and the sidewall connecting overcoat is provided with the inflation inlet corresponding with valve, and the sidewall of packing unit comprises the rubber layer, cord ply and the rubber layer that connect successively from outside to inside.
In cavity, annular groove position is provided with the brace of annular, and the inside wall of packing unit is tightly connected by the lateral wall of brace and packing unit, and brace is provided with the through hole of the cavity that can be communicated with in two adjacent annular projections.
The invention has the beneficial effects as follows:
1, this motive seal device for expansion pipe follows last root expansion tube lower going-into-well cylinder, just can seal annular space in expansion tube beginning from construction.
2, this motive seal device for expansion pipe is after expansion starts, and oil pipe is ejected in the process of well head, can realize movable sealing easily, keeping annular space in expansion tube to clean to crossing tubing coupling.
3, packing unit is wherein air storage bag structure, the inside UNICOM of three annular protrusions, provides real-time pressure distribute when crossing tubing coupling, and guarantee movable sealing is effective.
4, this motive seal device for expansion pipe after the expansion is completed, can be taken out of by the instrument that the external diameters such as expansion cone are larger, realizes recycling.
5, this motive seal device for expansion pipe is not only for movable sealing in construction of expanding provides a solution, also for the well of expansion tube construction adaptation multi-state or complex working condition provides new approaches and new technology.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, motive seal device for expansion pipe of the present invention is described in further detail.
Fig. 1 is the assembling drawing of motive seal device for expansion pipe.
Fig. 2 is the sectional view along A-A line embodiment 1 in Fig. 1.
Fig. 3 is the three-dimensional cutaway view of motive seal device for expansion pipe.
Fig. 4 is the schematic diagram of motive seal device for expansion pipe operation two in use.
Fig. 5 is the schematic diagram of motive seal device for expansion pipe operation three in use.
Fig. 6 is the schematic diagram of motive seal device for expansion pipe operation four in use.
Fig. 7 is the schematic diagram of motive seal device for expansion pipe operation five in use.
Fig. 8 be when embodiment 2 in Fig. 1 along the sectional view of A-A line.
Fig. 9 be when embodiment 3 in Fig. 1 along the sectional view of A-A line.
Figure 10 be when embodiment 4 in Fig. 1 along the sectional view of A-A line.
Wherein 1. connect overcoat, 2. packing unit, 21. cavitys, 22. annular projections, 23. annular grooves, 24. braces, 241. through holes, 25. spaces, 26. valves, 3. connect end cap, 4. dog screw, 5. metal ring, 51. rubber layers, 61. motive seal device for expansion pipe, oil pipe on 62., 63. tubing couplings, 64. times oil pipes, 65. expansion tubes.
Detailed description of the invention
Embodiment 1
Below in conjunction with accompanying drawing, motive seal device for expansion pipe of the present invention is described in detail.A kind of motive seal device for expansion pipe, comprise the connection overcoat 1 of tubular, connect the packing unit 2 that overcoat 1 internal fixtion is connected with tubular, the lateral wall of packing unit 2 is tightly connected with the inside wall being connected overcoat 1, the cavity 21 for inflating is provided with, as shown in Figure 1, Figure 2, Figure 3 shows in packing unit 2.
In this motive seal device for expansion pipe, embracing tightly can be suppressed oil pipe by the packing unit of tubular after inflation, and realize and the movable sealing suppressing oil pipe, this motive seal device for expansion pipe 61 can stop foreign matter in well to enter expansion tube 65 like this, make expansion tube 65 and the annular space suppressed between oil pipe in work progress keep clean, thus guarantee carrying out smoothly of expansion construction.
Generally when expanding construction, oil pipe comprises oil pipe 62 and lower oil pipe 64, the tubing coupling 63 suppressed between the upper oil pipe 62 of oil pipe and lower oil pipe 64 can right through packing unit 2, and the inwall with packing unit 2 rubs by the tubing coupling 63 protruding from oil pipe 62 and lower oil pipe 64 surface in the process of movable sealing.In order to ensure the movable sealing effect in this process, the interior side-wall surface of packing unit 2 is provided with multiple annular projection 22, forms annular groove 23 between two adjacent annular projections 22.The interior side-wall surface of preferred packing unit 2 is provided with three annular projections 22, and the interior side-wall surface of packing unit 2 forms two annular grooves 23.This annular projection 22 and the spaced structure of annular groove 23 just in time match with the tubing coupling 63 protruding from upper oil pipe 62 and lower oil pipe 64 surface, in tubing coupling 63 through out-of-date, the pressure distribution on real-time adjustment packing unit 2 surface, be convenient to the laminating of packing unit 2 surface and tubing coupling 63 and oil pipe, thus guarantee the movable sealing effect of packing unit 2 and oil pipe.In addition, sliding agent has been deposited at annular groove 23 place, is convenient to lubricate tubing coupling 63.
Uniform force when contacting with packing unit 2 to make tubing coupling 6, keep stable sealing effectiveness, preferred annular projection 22 is projected as circular arc the longitudinal section through connection overcoat 1 axis, central angle corresponding to this circular arc is less than 180 °, the size and shape of three annular projections 22 is all identical, the size and shape of two annular grooves 23 is all identical, as shown in figures 1 and 3.
Packing unit 2 after inflation, under the effect of gas pressure, the movement tendency of annular groove 22 position directed connection overcoat 1 axis direction, if namely do not add restriction to annular groove 22 position, packing unit 2 after inflation, annular groove 22 and the distance be connected between overcoat 1 axis can be less than annular projection 22 and the distance be connected between overcoat 1 axis, and namely seem can more as annular projection for annular groove 22.So in order to avoid inflating rear annular groove 22 position to the movement connecting overcoat 1 axis direction, in cavity 21, annular groove 22 position is provided with multiple brace 24, the inside wall of packing unit 2 is connected with the lateral wall of packing unit 2 by brace 24, is provided with space 25 between two adjacent braces 24.So both can ensure that annular groove 22 position after inflating can not be moved to the axis direction connecting overcoat 1, the cavity 21 in multiple annular projection 22 can be made again to keep being communicated with.
In addition, the lateral wall of packing unit 2 contacts with the inside wall being connected overcoat 1, and the two ends of packing unit 2 are fixedly connected with the two ends being connected overcoat 1 respectively by dog screw 4, and the one end connecting overcoat 1 is also provided with the connection end cap 3 of annular.The lateral wall of packing unit 2 is provided with the valve 26 for inflating, and the sidewall connecting overcoat 1 is provided with the inflation inlet corresponding with valve 26.The sidewall of packing unit 2 comprises the rubber layer, cord ply and the rubber layer that connect successively from outside to inside.Cord ply provides the skeletal support of packing unit 2, and the rubber layer of internal layer is used for the pressed gas in sealed cavity 21, and outer field rubber layer realizes sealing the locking of oil pipe column, so need have certain elasticity and anti-wear performance.
The course of work of this motive seal device for expansion pipe is as follows:
Operation 1: when expansion tube 65 and oil pipe assemble be near completion time, by this motive seal device for expansion pipe 61 through oil pipe, be arranged on the mouth of pipe of that root expansion tube 65 the most latter linked, use thread seal;
Operation 2: enter this motive seal device for expansion pipe 61 and tubing string under connected pipes, until tubing string puts in place, as shown in Figure 4;
Operation 3: high pressure is beaten on ground, hydraulic coupling is up by suppressing tubing string promotion expansion cone, so the oil pipe be connected with expansion cone also starts up, first tubing coupling 63 progresses into the scope of packing unit 2, as shown in Figure 5, Figure 6;
Operation 4: continue to suppress, upper oil pipe 62 and lower oil pipe 64 continue up, and packing unit is passed through in first tubing coupling 63, as shown in Figure 7;
Operation 5: repeatedly perform operation 3 and operation 4, terminates until expand, and this motive seal device for expansion pipe 61 is thrown off with expansion tube by the larger instrument of the external diameters such as expansion cone, and along with the instruments such as expansion cone trip out well head together, expansion tube operation completes.
When installing packing unit 2, there are two kinds of ways: if pressure reduction is little in 1 well, first can be inflated to operating pressure, then put it into and be connected to overcoat 1; If pressure reduction is large in 2 wells, so needs first packing unit 2 to be put into connection overcoat 1, after being connected with expansion tube 5, be inflated to operating pressure.Because this pressure is very large, under atmospheric pressure environments, the packing unit 2 after inflation by oil pipe locking, can install difficulty.
This motive seal device for expansion pipe not only provides a solution for movable sealing in construction of expanding, also for the well of expansion tube construction adaptation multi-state or complex working condition provides new approaches and new technology.
Embodiment 2
The difference of the present embodiment and embodiment 1 is: at annular groove 23 place, and the inner surface of packing unit 2 inside wall is fixedly connected with metal ring 5.
In embodiment 1, in order to prevent packing unit 2 after inflation, annular groove 22 position is to the motion of connection overcoat 1 axis direction, ensure that the cavity 21 in multiple annular projection 22 keeps being communicated with simultaneously, be provided with multiple brace 24 at annular groove 22 position, and be provided with space 25 between adjacent two braces 24.Although such setting can organize annular groove 22 position to the motion of connection overcoat 1 axis direction to a certain extent, but at the position in space 25, namely the position of brace 24 is not had, annular groove 22 still can to the motion of connection overcoat 1 axis direction, so be fixedly connected with metal ring 5 at the inner surface of packing unit 2 inside wall, the inner periphery strong bond of packing unit 2 inside wall and metal ring 5, such annular groove 22 would not have position to move to the axis direction connecting overcoat 1, as shown in Figure 8.
Preferable alloy ring 5 equals annular groove 23 in connection overcoat 1 length axially in connection overcoat 1 length axially.Remaining technical characteristic is identical with embodiment 1, no longer repeats.
Embodiment 3
In example 2, in order to prevent the circumferential all sites of annular groove 22 from all can not move to the axis direction connecting overcoat 1, the inner surface of packing unit 2 inside wall is fixedly connected with metal ring 5.But in use, if the gas pressure in packing unit 2 is excessive, the sidewall at annular groove 22 place has the trend be separated with metal ring 5, and namely metal ring 5 easily departs from, and application life has impact.In order to solve this problem, the external surface of packing unit 2 inside wall is fixedly connected with metal ring 5, as shown in Figure 9.Such annular groove 22 place can produce compressive stress to metal ring 5, and metal ring 5 is not easy to be separated with the sidewall at annular groove 22 place.Preferable alloy ring 5 equals annular groove 23 in connection overcoat 1 length axially in connection overcoat 1 length axially.
When the external surface of packing unit 2 inside wall is fixedly connected with metal ring 5, in order to reduce the friction of metal ring 5 and tubing coupling 63, the outer circumference of metal ring 5 is fixedly connected with packing unit 2, the surface of the inside circumference of metal ring 5 is provided with rubber layer 51, rubs with rubber layer 51 and tubing coupling 63.
Remaining technical characteristic is identical with embodiment 1, no longer repeats.
Embodiment 4
Although embodiment 2 and the certain good effect of embodiment 3, embodiment 2 exists and is unfavorable for processing and manufacturing, and metal ring 5 not easily puts into the shortcoming of the position of imagination, and embodiment 3 adds cost of production.
In the present embodiment, all can not move to the axis direction connecting overcoat 1 to prevent all sites of annular groove 22, in cavity 21, annular groove 22 position is provided with the brace 24 of annular, the inside wall of packing unit 2 is tightly connected by the lateral wall of brace 24 with packing unit 2, brace 24 is provided with multiple through holes 241 of the cavity 21 that can be communicated with in two adjacent annular projections 22, and multiple through hole 241 is uniformly distributed in the circumference of brace 24, as shown in Figure 10.
So both can solve all sites preventing annular groove 22 and all to the technical problem of the axis direction motion of connection overcoat 1, can not can overcome again the defect of embodiment 2 and embodiment 3.
Remaining technical characteristic is identical with embodiment 1, no longer repeats.
The above, be only specific embodiments of the invention, can not limit the scope that invention implements with it, so the displacement of its equivalent assemblies, or the equivalent variations done according to scope of patent protection of the present invention and modification, all still should belong to the category that this patent is contained.
Claims (9)
1. a motive seal device for expansion pipe, it is characterized in that, described motive seal device for expansion pipe comprises the connection overcoat (1) of tubular, connect the packing unit (2) that overcoat (1) internal fixtion is connected with tubular, the lateral wall of packing unit (2) is tightly connected with the inside wall being connected overcoat (1), is provided with the cavity (21) for inflating in packing unit (2);
In cavity (21), annular groove (22) position is provided with multiple brace (24), the inside wall of packing unit (2) is connected with the lateral wall of packing unit (2) by brace (24), is provided with space (25) between two adjacent braces (24).
2. motive seal device for expansion pipe according to claim 1, it is characterized in that: the interior side-wall surface of packing unit (2) is provided with multiple annular projection (22), between two adjacent annular projections (22), form annular groove (23).
3. motive seal device for expansion pipe according to claim 2, it is characterized in that: the interior side-wall surface of packing unit (2) is provided with three annular projections (22), the interior side-wall surface of packing unit (2) forms two annular grooves (23).
4. motive seal device for expansion pipe according to claim 3, it is characterized in that: annular projection (22) is projected as circular arc the longitudinal section through connection overcoat (1) axis, central angle corresponding to this circular arc is less than 180 °, the size and shape of three annular projections (22) is all identical, and the size and shape of two annular grooves (23) is all identical.
5. motive seal device for expansion pipe according to claim 2, it is characterized in that: at annular groove (23) place, the inner surface of packing unit (2) inside wall is fixedly connected with metal ring (5), and metal ring (5) equals annular groove (23) in connection overcoat (1) length axially in connection overcoat (1) length axially;
Or, at annular groove (23) place, the external surface of packing unit (2) inside wall is fixedly connected with metal ring (5), and metal ring (5) equals annular groove (23) in connection overcoat (1) length axially in connection overcoat (1) length axially.
6. motive seal device for expansion pipe according to claim 5, it is characterized in that: when the external surface of packing unit (2) inside wall is fixedly connected with metal ring (5), the outer circumference of metal ring (5) is fixedly connected with packing unit (2), and the surface of the inside circumference of metal ring (5) is provided with rubber layer (51).
7. motive seal device for expansion pipe according to claim 2, it is characterized in that: the two ends of packing unit (2) are fixedly connected with the two ends being connected overcoat (1) respectively by dog screw (4), the one end connecting overcoat (1) is also provided with the connection end cap (3) of annular.
8. motive seal device for expansion pipe according to claim 7, it is characterized in that: the lateral wall of packing unit (2) is provided with the valve (26) for inflating, the sidewall connecting overcoat (1) is provided with the inflation inlet corresponding with valve (26), and the sidewall of packing unit (2) comprises the rubber layer, cord ply and the rubber layer that connect successively from outside to inside.
9. motive seal device for expansion pipe according to claim 2, it is characterized in that: in cavity (21), annular groove (22) position is provided with the brace (24) of annular, the inside wall of packing unit (2) is tightly connected by the lateral wall of brace (24) with packing unit (2), and brace (24) is provided with the through hole (241) of the cavity (21) that can be communicated with in two adjacent annular projections (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283733.6A CN103410468B (en) | 2013-07-08 | 2013-07-08 | Motive seal device for expansion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310283733.6A CN103410468B (en) | 2013-07-08 | 2013-07-08 | Motive seal device for expansion pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103410468A CN103410468A (en) | 2013-11-27 |
| CN103410468B true CN103410468B (en) | 2015-11-18 |
Family
ID=49603502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310283733.6A Active CN103410468B (en) | 2013-07-08 | 2013-07-08 | Motive seal device for expansion pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103410468B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114293928B (en) * | 2021-12-28 | 2023-06-27 | 辽宁石油化工大学 | Underground stable joint for plugging operation |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044283U (en) * | 1988-12-19 | 1989-09-13 | 徐再禄 | Self-sealing direction adjustable seal for lever |
| CN2577051Y (en) * | 2002-11-07 | 2003-10-01 | 李树奎 | Intermediate rod sealing corrugated sleeve |
| CN2777186Y (en) * | 2005-01-10 | 2006-05-03 | 河北华北石油荣盛机械制造有限公司 | Inflated self-sealing type liquid drainage tube |
| CN201218077Y (en) * | 2008-07-08 | 2009-04-08 | 中国石油天然气股份有限公司 | Air bag type self-sealing blowout preventer |
| CN201412099Y (en) * | 2009-06-05 | 2010-02-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | Expansible sleeve assistance mechanism for safe expansion |
| CN101696623A (en) * | 2009-10-29 | 2010-04-21 | 辽宁奥夫斯达石油装备有限公司 | Steel wire cord expanding rubber packer for oil or gas well |
| CN102937009A (en) * | 2012-10-10 | 2013-02-20 | 西安三环科技开发总公司 | Top pressure bearing expansion pipe construction operation method |
| CN203420664U (en) * | 2013-07-08 | 2014-02-05 | 中国石油天然气股份有限公司 | Motive seal device used for expansion pipe |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7363984B2 (en) * | 1998-12-07 | 2008-04-29 | Enventure Global Technology, Llc | System for radially expanding a tubular member |
| US6446717B1 (en) * | 2000-06-01 | 2002-09-10 | Weatherford/Lamb, Inc. | Core-containing sealing assembly |
-
2013
- 2013-07-08 CN CN201310283733.6A patent/CN103410468B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044283U (en) * | 1988-12-19 | 1989-09-13 | 徐再禄 | Self-sealing direction adjustable seal for lever |
| CN2577051Y (en) * | 2002-11-07 | 2003-10-01 | 李树奎 | Intermediate rod sealing corrugated sleeve |
| CN2777186Y (en) * | 2005-01-10 | 2006-05-03 | 河北华北石油荣盛机械制造有限公司 | Inflated self-sealing type liquid drainage tube |
| CN201218077Y (en) * | 2008-07-08 | 2009-04-08 | 中国石油天然气股份有限公司 | Air bag type self-sealing blowout preventer |
| CN201412099Y (en) * | 2009-06-05 | 2010-02-24 | 中国石化集团胜利石油管理局钻井工艺研究院 | Expansible sleeve assistance mechanism for safe expansion |
| CN101696623A (en) * | 2009-10-29 | 2010-04-21 | 辽宁奥夫斯达石油装备有限公司 | Steel wire cord expanding rubber packer for oil or gas well |
| CN102937009A (en) * | 2012-10-10 | 2013-02-20 | 西安三环科技开发总公司 | Top pressure bearing expansion pipe construction operation method |
| CN203420664U (en) * | 2013-07-08 | 2014-02-05 | 中国石油天然气股份有限公司 | Motive seal device used for expansion pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103410468A (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102966327B (en) | Expansion tube | |
| CN104563871B (en) | A kind of hydraulic flushing in hole, desilting and deslagging integrated apparatus and method | |
| CN104879069B (en) | A kind of back-off sub of achievable flexible compensation | |
| CN202117638U (en) | Novel gas lifting downhole tool of continuous oil tube | |
| CN203420664U (en) | Motive seal device used for expansion pipe | |
| CN103410468B (en) | Motive seal device for expansion pipe | |
| CN203374213U (en) | Concentric inner pipe suspension structure of double-wall drill pipe | |
| CN101210485A (en) | Design method of expansion sleeve for oil field | |
| CN206530312U (en) | A kind of inflatable packer | |
| CN201786302U (en) | Expansion construction tool | |
| CN102182417A (en) | Salvageable and expandable expansion tube patch tool | |
| CN205382907U (en) | Two effect expansion devices of machinery hydraulic pressure suitable for expansion pipe well drilling | |
| CN102937008A (en) | Top multistage pressure-bearing expansion pipe expansion construction device | |
| CN112065312A (en) | Hydraulic telescopic coiled tubing tractor for dense gas operation and use method | |
| CN110924868A (en) | Production manufacturing process and construction process of drill rod capable of expanding diameter | |
| CN202745798U (en) | Layered water injection centering packer of directional well | |
| CN206693967U (en) | D type coupling type lock cores | |
| CN203499628U (en) | Well washing type step-by-step deblocking expandable long rubber sleeve packer | |
| CN200985759Y (en) | Expansion casing tube device having cushioning capacity | |
| CN201068761Y (en) | Down-hole salvaging tool | |
| CN101481999B (en) | Drilling rod with asymmetric special-shaped cross section | |
| CN202937212U (en) | Top multistage pressure bearing type expandable construction device for expandable pipes | |
| CN102937009A (en) | Top pressure bearing expansion pipe construction operation method | |
| CN203867502U (en) | Hydraulic releasing tool | |
| CN202882847U (en) | Underground well erosion resistance throttling sand blaster |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |