CN104120987B - Forward and reverse sand washing jet nozzle for oil well - Google Patents
Forward and reverse sand washing jet nozzle for oil well Download PDFInfo
- Publication number
- CN104120987B CN104120987B CN201410347247.0A CN201410347247A CN104120987B CN 104120987 B CN104120987 B CN 104120987B CN 201410347247 A CN201410347247 A CN 201410347247A CN 104120987 B CN104120987 B CN 104120987B
- Authority
- CN
- China
- Prior art keywords
- sand washing
- core pipe
- ring
- sand
- oil well
- 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
- Nozzles (AREA)
Abstract
The invention provides a forward and reverse sand washing jet nozzle for an oil well. The forward and reverse sand flushing jet nozzle comprises a tubular sand washing body and a core pipe, wherein an annular portion is arranged in a front port of the sand washing body, multiple hole passages are evenly distributed in the annular portion along the peripheral direction and axially run though the annular portion in the axial direction of the sand washing body, and jet nozzle bodies are embedded and fixed in the hole passages. The core pipe is located in the sand washing body, an annular cavity communicated with the jet nozzle bodies is formed between the core pipe and the sand washing body, the front end of the core pipe is connected with the annular portion, a stopping part is arranged at the position of a port at the rear end, a ball seat is annularly formed on the inner surface of the core pipe, multiple channels are evenly distributed on the side wall of the ball seat, adjacent to the rear side of the ball seat and correspondingly communicated with the annular cavity and the inner cavity of the core pipe, and a valve ball capable of correspondingly setting the ball seat is additionally arranged in the core pipe and can be movably arranged between the ball seat and the stopping part. The forward and reverse sand washing jet nozzle is good in sand washing capacity and high in sand discharge speed and has forward sand washing and reverse sand discharge functions, and sand washing and discharge operation can be achieved by tripping the forward and reverse sand washing jet nozzle in a next tubular column.
Description
Technical field
The invention belongs to field of petroleum exploitation, in particular in a kind of oil exploitation technology for well maintenance
Sand flushing nozzle, especially a kind of oil well positive negative sand washing nozzle.
Background technology
At present, either peupendicular hole or horizontal well, or sand fracturing well stimulation well, due to time reason and work
Skill reason, oil well generally existing sand buries oil reservoir phenomenon, and under fluid column compaction, sand face can form a heavily fortified point to some oil well sand settings
Real sand cap, impact oil well normally produces, and needs sand washing.
Conventional sand washing method is to install a nib in 73mm oil pipe lower end, and sand cleaning fluid is ejected into sand face from nib, will
Sand suspends, and using the carrying capacity of fluid, removes pit shaft.This method, due to being relatively large in diameter of nib, jet impulse
Power is little it is impossible to effective dispersion sand cap, needs and screw drill are used in combination, i.e. must be bored with screw drill before sand washing and open sand face, Ran Houti
Go out tubing string, more lower sand-flushing pipe column carries out sand washing, however, taking screw drill to bore sand face need 2 tubing strings, continuously construction in several days, effect
Rate is low, costly, delays production；If in addition, horizontal well sand washing, due to horizontal well itself pit shaft feature, leading to sand grains to deposit
During net horizontal section, sand washing, due to sand natural subsidence characteristic, conventional sand flushing tool is difficult to for sand to discharge ground.
For this reason, someone, using entering the method such as coiled tubing or multiinjector jet under in oil pipe, improves sand washing effect, but still
So there are various problems.For example, invention entitled " multidirectional jet flow sand washing machine " (application number: in 201210252865.8)
A kind of state's patent application, there is provided multidirectional jet flow sand washing machine, including sand washing machine body and nozzle, the periphery of sand washing machine body tip
Several circulation ports are had on face, circulation port is installed nozzle, its advantage is that structure is simple, easy to process, with low cost, practical
Reliable, easy to operate；Shortcoming is the annular space sediment outflow between oil pipe and sleeve pipe, for 177.8mm sleeve pipe, annular space area
Greatly, discharge opeing upward velocity is low, carries sand ability.
In view of this, the present inventor, according to the production design experiences being engaged in this area and association area for many years, develops one
Plant oil well positive negative sand washing nozzle, to solving the problems, such as prior art.
Content of the invention
The purpose of the present invention is to be to provide a kind of oil well positive negative sand washing nozzle, and sand washing ability is strong, and sediment outflow speed is fast, under enter
One-trip string can achieve sand washing sediment outflow operation, has positive sand washing and anti-sand discharge function.
For this reason, the present invention proposes a kind of oil well positive negative sand washing nozzle, comprising:
One sand washing body in a tubular form, is provided with a ring portion, in described ring portion circumferentially in the front port of described sand washing body
It is evenly equipped with multiple ducts, described duct axially through described ring portion, is embedded inside it and is fixed with nozzle along described sand washing body；
One core pipe, in described sand washing body, is formed with one and described spray between described core pipe and described sand washing body
The ring cavity that mouth is connected, its front end is connected with described ring portion, and the port of its rear end is provided with a stop part, described core pipe interior
On surface, ring sets and is formed with a ball seat, its side wall is circumferentially separately evenly equipped with multiple passages, described passage is adjacent to described ball seat
Rear side, its corresponding inner chamber connecting described ring cavity and described core pipe, be separately equipped with described core pipe one can correspond to and set described in
The valve ball of ball seat, described valve ball is mobile to be arranged between described ball seat and stop part.
Oil well positive negative sand washing nozzle as above, wherein, described duct includes one first duct and the from front to back
Two ducts, the internal diameter in described first duct is less than the internal diameter in described second duct, and both form a shoulder, described nozzle in joint
Correspondence is embedded in described second duct, and its front end is abutted against with described shoulder, and its rear end and is embedded in described
Contact on front side of pressure ring in second duct, described first duct is connected with described ring cavity by described nozzle.
Oil well positive negative sand washing nozzle as above, wherein, described core pipe includes a front linkage section and rear body section, institute
The external diameter stating front linkage section is less than the external diameter of described rear body section, and the joint of both lateral surfaces forms a shoulder block, described shoulder block
Correspondence is resisted against the rear end face of described ring portion and the rear side of described pressure ring, and described front linkage section passes through external screw thread and described ring portion
Inner ring surface is spirally connected fixation, and described passage and stop part are located in described rear body section.
Oil well positive negative sand washing nozzle as above, wherein, the internal diameter of described front linkage section is less than described rear body section
Internal diameter, the joint of both medial surfaces forms described ball seat.
Oil well positive negative sand washing nozzle as above, wherein, the medial surface of described front linkage section and described rear body section it
Between be connected by a taper anchor ring, described taper anchor ring is formed as the medial surface of described ball seat, and described valve ball can correspond to and set
On described taper anchor ring.
Oil well positive negative sand washing nozzle as above, wherein, described stop part is a straight pin, and described straight pin is radially
It is arranged in described core pipe, its two ends is connected with the side wall of described core pipe.
Oil well positive negative sand washing nozzle as above, wherein, described stop part is a baffle ring, and described baffle ring passes through outer
Screw thread and described core pipe bolt, its internal diameter is less than the diameter of described valve ball.
Oil well positive negative sand washing nozzle proposed by the present invention, by setting valve ball and ball seat in core pipe, enables single current
The function of valve, controls area of passage, i.e. when positive sand washing (sand cleaning fluid enters from oil pipe column), core pipe is closed, and reduces flow-passing surface
Long-pending, improve sand washing ability；During recoil sand (sand cleaning fluid enters from oil jacket annular space), core pipe inner chamber is opened, and expands area of passage, improves
Sediment outflow ability.
Oil well positive negative sand washing nozzle proposed by the present invention, using high-pressure water jet broken rock principle, under hydraulic action, energy
Enough destroy sand cap, by positive sand washing and recoil being used alternatingly of sand, effectively realize sand washing sediment outflow operation.
Oil well positive negative sand washing nozzle proposed by the present invention, bores sand facies ratio with existing screw drill, and its structure is simple, operation side
Just, sand washing ability is strong, and sediment outflow speed is fast, time-consuming, and impact capacity is strong, and impact effect is good；By under enter one-trip string
Realize sand washing sediment outflow operation, can apply to horizontal well, high angle hole, peupendicular hole etc., applied widely.
Brief description
The following drawings is only intended to, in doing schematic illustration and explanation to the present invention, not delimit the scope of the invention.Wherein:
Fig. 1 is the structural representation of the oil well positive negative sand washing nozzle of the present invention.
Fig. 2 is the structural representation of sand washing body in Fig. 1.
Fig. 3 is the structural representation of Fig. 1 core pipe, the not shown valve ball of in figure.
Main element label declaration:
1 sand washing body 11 ring portion
12 duct 121 first duct
122 second ducts
13 nozzle 14 pressure ring
Linkage section before 2 core pipes 201
Body section 203 shoulder block after 202
21 ball seat 211 taper anchor ring
22 passage 23 valve ball
3 stop part h ring cavities
Specific embodiment
The present invention provides a kind of oil well positive negative sand washing nozzle, comprising: a sand washing body in a tubular form, described sand washing body
Front port in be provided with a ring portion, described ring portion has been evenly distributed multiple ducts, described duct is along described sand washing body
Axially through described ring portion, it is embedded inside it and is fixed with nozzle；One core pipe, in described sand washing body, described core pipe and institute
State and between sand washing body, be formed with a ring cavity being connected with described nozzle, its front end is connected with described ring portion, its rear end
Port is provided with a stop part, and on the inner surface of described core pipe, ring sets and is formed with a ball seat, and its side wall is circumferentially separately evenly equipped with
Multiple passages, adjacent to the rear side of described ball seat, it corresponds to the inner chamber connecting described ring cavity and described core pipe to described passage, described
Separately it is equipped with one in core pipe and can correspond to the valve ball setting described ball seat, described valve ball is mobile to be arranged on described ball seat and backstop
Between part.
Oil well positive negative sand washing nozzle proposed by the present invention, by arranging sand washing body and core pipe, is broken using high-pressure water jet
Rock principle, destroys sand cap under hydraulic action, by positive sand washing and recoil being used alternatingly of sand, effectively realizes sand washing sediment outflow and makees
Industry.
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, below in conjunction with accompanying drawing and preferably
Embodiment, to the specific embodiment of oil well positive negative sand washing nozzle proposed by the present invention, structure, feature and effect, describes in detail
As rear.In addition, by the explanation of specific embodiment, when to the present invention can be reach the technological means that predetermined purpose taken and
Effect be able to more deeply specific understand, but institute's accompanying drawing be only provide with reference to and explanation use, be not used for the present invention plus
To limit.
Fig. 1 is the structural representation of the oil well positive negative sand washing nozzle of the present invention.Fig. 2 is that the structure of sand washing body in Fig. 1 is shown
It is intended to.Fig. 3 is the structural representation of Fig. 1 core pipe, the not shown valve ball of in figure.
As shown in figure 1, being oil well positive negative sand washing nozzle proposed by the present invention, it includes a sand washing body 1 and a core pipe 2,
Wherein:
Described sand washing body 1 in a tubular form, is provided with a ring portion 11, described ring portion 11 in the front-end port of described sand washing body 1
On be evenly distributed multiple ducts 12, described duct 12 along described sand washing body 1 axially through described ring portion 11, inside it
It is embedded and be fixed with nozzle 13, in underground work, by arranging nozzle 13, when injecting high speed liquid flow in duct 12, can be through spray
Mouth 13 high-speed jet ejects, and impulsive force is big, can effectively break up sand cap；
Described core pipe 2 is located in described sand washing body 1, is formed with a ring cavity between described core pipe 2 and described sand washing body 1
H, described ring cavity h is connected with described nozzle 13, and described core pipe 2 front end is connected with described ring portion 11, the port of its rear end
It is provided with a stop part 3, on the inner surface of described core pipe 2, ring sets and is formed with a ball seat 21, its side wall is circumferentially separately evenly equipped with many
Individual passage 22, adjacent to the rear side of described ball seat 21, it is corresponding to connect the interior of described ring cavity h and described core pipe 2 to described passage 22
Chamber, is separately equipped with one and can correspond to the valve ball 23 setting described ball seat 21, described valve ball 23 is mobile to be arranged in described core pipe 2
Between described ball seat 21 and stop part 3.
Please also refer to Fig. 2, described duct 12 includes one first duct 121 and the second duct 122 from front to back, described
The internal diameter in the first duct 121 is less than the internal diameter in described second duct 122, and both joints form a shoulder (in figure does not indicate),
Described nozzle 13 correspondence is embedded in described second duct 122, and its front end is abutted against with described shoulder, and its rear end is pressed with one
Contact on front side of ring 14, described pressure ring 14 is embedded in described second duct 122, institute is then passed through in described first duct 121
State nozzle 13 to be connected with described ring cavity h, in the present invention, by arranging shoulder and pressure ring 14, under both cooperating,
This nozzle 13 can easily be fixed, make need not be connected in modes such as screw thread, pin joints again between this nozzle 13 and the second duct 122,
Easily facilitate nozzle 13 to be assembled and change.
As shown in figure 3, described core pipe 2 includes a front linkage section 201 and rear body section 202, described front linkage section 201
External diameter is less than the external diameter of described rear body section 202, and the joint of both lateral surfaces forms a shoulder block 203, and described shoulder block 203 is corresponding
It is resisted against the rear end face of described ring portion 11 and the rear side of described pressure ring 14, described front linkage section 201 passes through external screw thread and described ring
The inner ring surface 111 in portion 11 is spirally connected fixation, and described passage 22 and stop part 3 are located in described rear body section 202.
Wherein, the internal diameter of described front linkage section 201 is less than the internal diameter of described rear body section 202, the connecting of both medial surfaces
Place forms described ball seat 21.It is preferred that pass through one between the medial surface of described front linkage section 201 and described rear body section 202 boring
Shape ring face 211 is connected, and described taper anchor ring 211 is formed as the medial surface of described ball seat 21, and described valve ball 23 can correspond to and set
On described taper anchor ring 211.
Preferably described stop part 3 is a straight pin, and described straight pin is radially arranged in described core pipe 1, its two ends and institute
Side wall connection (as spot welding) stating core pipe 1 is fixing.Certainly, not limited to this in a particular application, such as, described stop part 3 also may be used
For a baffle ring (not shown), by external screw thread and described core pipe bolt, its internal diameter is less than described valve for described baffle ring
The diameter of ball.
Oil well positive negative sand washing nozzle proposed by the present invention, in specific works, the rear end of this sand washing body 1 is connected to
Oil pipe column lower end, is formed sand-flushing pipe column in the lump, is connected to pump truck by wellhead casing pipe, surface line in oil pipe column upper end,
The upper hose of pump truck connects sand washing working liquid tank, afterwards, by the sleeve pipe under this sand-flushing pipe column lower going-into-well, wherein:
In sand washing operation, ground pump truck pumps into high-speed liquid into oil pipe column, and this high speed liquid flow is entered through oil pipe column
Enter in ring cavity h and core pipe 2, wherein, under fluid impact effect, valve ball 23 sets on ball seat 21, thus closing the interior of core pipe
So that high-pressure fluid only sprays from nozzle high speed via ring cavity h, fluid jet impacts the hard sand cap of oil well in chamber, and formation is taken
Sand liquid, realizes sand washing operation；
In sediment outflow operation, ground pump truck pumps into high pressure liquid in the annular space (oil jacket annular space) between oil pipe column and sleeve pipe
Body, this highly pressurised liquid takes the high-velocity fluid of sand suspension formation, and a part enters ring cavity through duct and nozzle, another part by
Core pipe lower end enters core pipe, and in the presence of fluid impact, valve ball leaves ball seat, so that core pipe is in open mode, makes stream
Physical efficiency enters ring cavity through core pipe lower end, passage, thus expanding area of passage, makes the inner chamber upwards through oil pipe column for the sand liquid, returns
Ground, because oil pipe column size is little, flow velocity is fast, quickly load fluid can be discharged pit shaft, thus realizing sediment outflow operation.
Wherein, for the selection of pump truck, can be according to oil pipe column, the casing-type of down-hole depending on, here does not specifically limit
Fixed, such as, if 127mm sleeve pipe, 73mm oil pipe column, can use 1 400 type cement pump truck, directly positive sand washing, oil jacket annular space
Sediment outflow；If 139.7mm sleeve pipe, 73mm oil pipe, can use the directly positive sand washing of 1 700 type cement oil jacket, oil jacket annular space sediment outflow；
If composite bushing (that is, 177.8mm sleeve pipe hangs the oil well of 127mm sleeve pipe), can use 2 cement pump trucks, wherein 1 pump truck
Connect oil pipe column, in addition 1 pump truck female connector pipe, blocked operation, realize positive sand washing anti-sediment outflow operation.
Oil well positive negative sand washing nozzle proposed by the present invention, by setting valve ball and ball seat in core pipe, enables single current
The function of valve, controls area of passage, i.e. when positive sand washing (sand cleaning fluid enters from oil pipe column), core pipe is closed, and reduces flow-passing surface
Long-pending, improve sand washing ability；During recoil sand (sand cleaning fluid enters from oil jacket annular space), core pipe inner chamber is opened, and expands area of passage, improves
Sediment outflow ability.In actual use, by positive sand washing and recoil being used alternatingly of sand, it is possible to achieve sand washing sediment outflow operation.
Oil well positive negative sand washing nozzle proposed by the present invention, bores sand facies ratio with existing screw drill, and its structure is simple, operation side
Just, sand washing ability is strong, and sediment outflow speed is fast, time-consuming, and impact capacity is strong, and impact effect is good；By under enter one-trip string
Realize sand washing sediment outflow operation, can apply to horizontal well, high angle hole, peupendicular hole etc., applied widely.
The foregoing is only the schematic specific embodiment of the present invention, be not limited to the scope of the present invention.Any
Those skilled in the art, the equivalent variations made on the premise of the design without departing from the present invention and principle and modification, all should
Belong to the scope of protection of the invention.
Claims (7)
1. a kind of oil well positive negative sand washing nozzle is it is characterised in that described oil well positive negative sand washing nozzle includes:
One sand washing body in a tubular form, is provided with a ring portion, described ring portion is evenly distributed in the front port of described sand washing body
There are multiple ducts, described duct axially through described ring portion, is embedded inside it and is fixed with nozzle along described sand washing body；
One core pipe, in described sand washing body, is formed with one and described nozzle phase between described core pipe and described sand washing body
The ring cavity of connection, its front end is connected with described ring portion, and the port of its rear end is provided with a stop part, the inner surface of described core pipe
Upper ring sets and is formed with a ball seat, and its side wall has been evenly distributed multiple passages, described passage adjacent to the rear side of described ball seat,
Its corresponding inner chamber connecting described ring cavity and described core pipe, is separately equipped with one and can correspond to the valve setting described ball seat in described core pipe
Ball, described valve ball is mobile to be arranged between described ball seat and stop part.
2. oil well positive negative sand washing nozzle as claimed in claim 1 is it is characterised in that described duct includes one from front to back
One duct and the second duct, the internal diameter in described first duct is less than the internal diameter in described second duct, and both joints form a shoulder
Portion, described nozzle correspondence is embedded in described second duct, and its front end is abutted against with described shoulder, and its rear end is embedded with one
It is fixed on and contacts on front side of the pressure ring in described second duct, described first duct is connected with described ring cavity by described nozzle
Logical.
3. oil well positive negative sand washing nozzle as claimed in claim 2 it is characterised in that described core pipe include one before linkage section and
Body section afterwards, the external diameter of described front linkage section is less than the external diameter of described rear body section, and the joint of both lateral surfaces forms a gear
Shoulder, described shoulder block correspondence is resisted against the rear end face of described ring portion and the rear side of described pressure ring, and described front linkage section passes through external screw thread
It is spirally connected fixation with the inner ring surface of described ring portion, described passage and stop part are located in described rear body section.
4. oil well positive negative sand washing nozzle as claimed in claim 3 is it is characterised in that the internal diameter of described front linkage section is less than described
The internal diameter of body section afterwards, the joint of both medial surfaces forms described ball seat.
5. oil well positive negative sand washing nozzle as claimed in claim 4 is it is characterised in that described front linkage section and described rear body section
Medial surface between be connected by a taper anchor ring, described taper anchor ring is formed as the medial surface of described ball seat, described valve ball
Can correspondence set on described taper anchor ring.
6. the oil well positive negative sand washing nozzle as described in any one of claim 1 to 5 is it is characterised in that described stop part is a circle
Pin, described straight pin is radially arranged in described core pipe, and its two ends is connected with the side wall of described core pipe.
7. the oil well positive negative sand washing nozzle as described in any one of claim 1 to 5 is it is characterised in that described stop part stops for one
Baffle ring, described baffle ring passes through external screw thread and described core pipe bolt, and its internal diameter is less than the diameter of described valve ball.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410347247.0A CN104120987B (en) | 2014-07-21 | 2014-07-21 | Forward and reverse sand washing jet nozzle for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410347247.0A CN104120987B (en) | 2014-07-21 | 2014-07-21 | Forward and reverse sand washing jet nozzle for oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104120987A CN104120987A (en) | 2014-10-29 |
| CN104120987B true CN104120987B (en) | 2017-01-25 |
Family
ID=51766597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410347247.0A Active CN104120987B (en) | 2014-07-21 | 2014-07-21 | Forward and reverse sand washing jet nozzle for oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104120987B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401385B (en) * | 2017-08-02 | 2023-11-17 | 中国石油天然气集团有限公司 | Jet erosion tool and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584818Y (en) * | 2002-11-14 | 2003-11-05 | 辽河石油勘探局锦州工程技术处 | Sand washing, oil receiving, sealing device for oil well |
| CN201507276U (en) * | 2009-08-28 | 2010-06-16 | 中国石油化工股份有限公司 | Sand prevention valve for controlling washing of well |
| CN203129997U (en) * | 2013-01-04 | 2013-08-14 | 米振红 | Anti-backflow sand-washing check valve |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN204113152U (en) * | 2014-07-21 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of oil well positive negative sand washing nozzle |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8066059B2 (en) * | 2005-03-12 | 2011-11-29 | Thru Tubing Solutions, Inc. | Methods and devices for one trip plugging and perforating of oil and gas wells |
-
2014
- 2014-07-21 CN CN201410347247.0A patent/CN104120987B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584818Y (en) * | 2002-11-14 | 2003-11-05 | 辽河石油勘探局锦州工程技术处 | Sand washing, oil receiving, sealing device for oil well |
| CN201507276U (en) * | 2009-08-28 | 2010-06-16 | 中国石油化工股份有限公司 | Sand prevention valve for controlling washing of well |
| CN203129997U (en) * | 2013-01-04 | 2013-08-14 | 米振红 | Anti-backflow sand-washing check valve |
| CN103277059A (en) * | 2013-05-30 | 2013-09-04 | 中国石油天然气股份有限公司 | Negative pressure combined-sand-washing and forced-sand-draining device |
| CN204113152U (en) * | 2014-07-21 | 2015-01-21 | 中国石油天然气股份有限公司 | A kind of oil well positive negative sand washing nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104120987A (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110617044B (en) | Ultrahigh-pressure water jet slotting system and using method thereof | |
| CN108547604B (en) | Drilling and stamping integrated device and method | |
| CN102535470B (en) | Water jet sprayer assisting offshore platform in sinking pile | |
| CN109653691B (en) | Hydraulic and mechanical compound controllable rock debris bed cleaning tool | |
| CN203856412U (en) | High-pressure water jet drilling and cutting integrated drill bit | |
| CN103967439A (en) | Continuous milling and salvage integrated tool and milling and salvage method thereof | |
| CN104295238A (en) | Radial drilling device for abrasive water jet flow | |
| CN202000941U (en) | Underground sleeving wall punching device for oil well | |
| CN105317380B (en) | A kind of variable-flow bores and rushes unitary nozzle | |
| CN106437585A (en) | Portable sand pumping device and process using double-layer continuous oil pipe | |
| CN105156048A (en) | Concentric double-tube sand removal well-washing machine | |
| CN205189826U (en) | Well -flushing sand washing device | |
| CN111894496A (en) | Drilling pressure control type underground circulation short circuit and coiled tubing drill plug dynamic flushing process | |
| CN204113152U (en) | A kind of oil well positive negative sand washing nozzle | |
| CN104120987B (en) | Forward and reverse sand washing jet nozzle for oil well | |
| CN203547562U (en) | Integrated drilling and cutting drill stem | |
| CN105332675A (en) | Well clean-up sand washing device and method | |
| CN103573193B (en) | Integration is bored and is cut boring rod set | |
| CN203603805U (en) | Coiled tubing sand washing and well flushing tool | |
| CN201991503U (en) | Nozzle-built-in hydraulic jet | |
| CN102518398B (en) | Self-advancing type high-pressure jet sprayer for radial horizontal well drilling | |
| CN103821490A (en) | Special ejector with multilevel hydraulic ejecting and staged fracturing | |
| CN205297350U (en) | From booster -type PDC drill bit | |
| CN105903586A (en) | Combined type double jet flow nozzle | |
| CN208122840U (en) | A kind of protection sleeve pipe volume fracturing tubing string |
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 |