CN109973025B - Reverse circulation joint applied to geological exploration drilling tool - Google Patents
Reverse circulation joint applied to geological exploration drilling tool Download PDFInfo
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- CN109973025B CN109973025B CN201910257943.5A CN201910257943A CN109973025B CN 109973025 B CN109973025 B CN 109973025B CN 201910257943 A CN201910257943 A CN 201910257943A CN 109973025 B CN109973025 B CN 109973025B
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- 238000005553 drilling Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 154
- 239000000843 powder Substances 0.000 description 8
- 239000002002 slurry Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a reverse circulation joint applied to a geological exploration drilling tool, which comprises a tubular joint body; an upper water inlet cavity is formed in the upper end of the joint body, a lower water outlet cavity is formed in the lower end of the joint body, a shunting cavity is formed between the lower water outlet cavity and the upper water inlet cavity, and the upper end of the lower water outlet cavity is communicated with the shunting cavity; the connector comprises a connector body and is characterized in that a reverse water outlet with an upward water outlet direction is formed in the side wall of the connector body, the reverse water outlet is communicated with a flow dividing cavity through a reverse circulation pipeline, and an upper water inlet cavity is communicated with the flow dividing cavity through a forward circulation pipeline. Through using such joint, connect the joint between the drilling rod, when rivers flow through the joint, from the top the cavity of intaking gets into, get into the reposition of redundant personnel cavity from forward circulation pipeline after, get into reverse circulation pipeline and lower play water cavity respectively after the rivers reposition of redundant personnel, the rivers that get into reverse circulation pipeline are reverse from drilling upflow, can effectually drive rivers and return ground.
Description
Technical Field
The invention relates to a reverse circulation joint applied to a geological exploration drilling tool.
Background
In the oil exploration process, rivers get into from the drilling rod, flow from the drill bit water route, cool off and lubricate the drill bit, flow to the bottom surface from the clearance of outer tube with drilling again, will creep into the piece powder simultaneously and take out the bottom surface, only take out the drilling efficiency that the drill bit could be maintained with the piece powder, otherwise the drill bit can't creep into. The current backward flow water flow is less, and when drilling sunken appears between drilling and the outer tube, the rivers that have the piece powder can the siltation in drilling sunken department, can't get rid of ground, influences greatly and creeps into efficiency. Increase rivers volume of getting rid of through increaseing water pressure in the construction that has now, but the effect is not good, and increase water pressure can accelerate the velocity of flow for rivers erode drilling, make the increase of drilling aperture, be unfavorable for the construction, and because the water yield is little, can't effectually take out the piece powder in the drilling is sunken. In the prior art, a reverse circulation joint applied to a geological exploration drilling tool, which can bring the chippings powder in the existing drilling pit out of the ground and accelerate the discharge of water flow, is urgently needed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a reverse circulation joint for a geological exploration drilling tool, which can bring the debris powder in the existing drilling hole recess out of the ground and accelerate the drainage of water flow.
In order to achieve the purpose, the technical scheme of the invention provides a reverse circulation joint applied to a geological exploration drilling tool, which comprises a tubular joint body, wherein an upper connector and a lower connector which are matched and connected with a drill rod are respectively arranged at the upper end and the lower end of the tubular joint body; an upper water inlet cavity is formed in the upper end of the joint body, a lower water outlet cavity is formed in the lower end of the joint body, a shunting cavity is formed between the lower water outlet cavity and the upper water inlet cavity, and the upper end of the lower water outlet cavity is communicated with the shunting cavity; a reverse water outlet with an upward water outlet direction is formed in the side wall of the joint body, the reverse water outlet is communicated with the flow dividing cavity through a reverse circulation pipeline, and the upper water inlet cavity is communicated with the flow dividing cavity through a forward circulation pipeline; the reverse circulation pipeline is not directly communicated with the forward circulation pipeline; the pipe diameter of the forward circulating pipeline is larger than the aperture of an upper opening of the lower water outlet cavity.
Through using such joint, connect the joint between the drilling rod, when rivers flow through the joint, the cavity that entries from the top gets into, get into the reposition of redundant personnel cavity from forward circulation pipeline after, get into reverse circulation pipeline and lower play water cavity respectively after the rivers reposition of redundant personnel, the rivers that get into reverse circulation pipeline are reverse from the drilling upflow, can effectually drive rivers and return ground, especially take out the drilling with the piece powder in the drilling is sunken, improve the cleaning performance to the drill bit, improve and creep into efficiency.
Preferably, the bottom of the upper water inlet cavity is a blind end, upper water outlet holes are formed in two sides of the blind end, forward circulating pipelines are respectively arranged on two side walls of the joint body, and the two upper water outlet holes are respectively communicated with ports of the two forward circulating pipelines; and the lower ports of the two forward circulating pipelines are communicated with the flow dividing cavity. By the design, water flow can be quickly introduced into the flow dividing cavity.
Preferably, the reverse water outlets are symmetrically formed in the side wall of the connector body, the reverse circulation pipeline is arranged in the middle of the connector body, the lower port is communicated with the diversion cavity, the upper port is communicated with the V-shaped reverse pipeline, and the outlet of the V-shaped reverse pipeline is communicated with the reverse water outlets.
Such design can be fast introduces reverse delivery port with rivers from the reposition of redundant personnel cavity, and the reverse play rivers that two symmetrical reverse delivery ports are more even in the distribution in drilling, more be favorable to exerting the reverse drive effect of rivers. Reverse circulation pipeline sets up in the middle part of connecting the body, and forward circulation pipeline sets up the overall arrangement in both sides and has avoided interference between the two, and rivers flow smoothly orderly.
Preferably, a water diversion eyeshade is arranged outside the water return outlet, the water diversion eyeshade comprises a bottom plate and a side plate, and the side plate is arc-shaped; two ends of the bottom plate are welded on the side wall of the joint body, and the bottom plate, the bottom of the side plate and the side wall of the joint body are welded in an enclosing manner to form a blind end; the water diversion eyeshade is matched with the side wall of the connector body to form an eyeshade reverse water outlet, and the eyeshade reverse water outlet is upward. By the design, reverse water flow can better flow reversely under the guidance of the water diversion eyeshade.
Preferably, the forward circulation pipeline is enclosed by a forward circulation water tank and a return water tank plate which are arranged on the side wall of the joint body, and the outer edge of the return water tank plate is welded on the side wall of the joint body. Such a design is an option for a forward circulation circuit.
Preferably, a lower nozzle is installed in the lower water outlet cavity, and an inner cavity of the lower nozzle is a tapered inner cavity with a narrow upper part and a wide lower part; this arrangement facilitates the release of pressure from the lower nozzle to restore the predetermined water pressure.
Preferably, a middle nozzle is connected in the reverse circulation pipeline, the middle nozzle comprises a lower gathering section and an upper releasing section, an inner cavity of the lower gathering section is a conical inner cavity with a narrow top and a wide bottom, and an inner cavity of the upper releasing section is a conical inner cavity with a wide top and a narrow bottom. Such design when doing benefit to the rivers reverse, earlier through gathering section guide collection rivers down, make rivers reach predetermined water pressure and shunt through the reverse pipeline of V type through last release section again.
Preferably, the upper connector and the lower connector are both externally tapered threaded connectors. The design is beneficial to reducing the length of the reverse circulation joint and reducing the cost.
The invention has the advantages and beneficial effects that: through using such joint, connect the joint between the drilling rod, when rivers flow through the joint, the cavity that entries from the top gets into, get into the reposition of redundant personnel cavity from forward circulation pipeline after, get into reverse circulation pipeline and lower play water cavity respectively after the rivers reposition of redundant personnel, the rivers that get into reverse circulation pipeline are reverse from the drilling upflow, can effectually drive rivers and return ground, especially take out the drilling with the piece powder in the drilling is sunken, improve the cleaning performance to the drill bit, improve and creep into efficiency.
Drawings
FIG. 1 is a schematic view of the structure of the joint body of the present invention (omitting the return water trough plate and the water diversion eyeshade);
FIG. 2 is a sectional view of the joint body structure of the present invention (omitting the return water trough plate, the water diversion eye cover, the middle nozzle, and the lower nozzle);
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a joint structure according to the present invention;
FIG. 5 is a sectional view taken along line B-B of FIG. 4;
FIG. 6 is a half sectional view of a coupling structure according to the present invention;
FIG. 7 is a top view of the joint of the present invention;
FIG. 8 is a schematic view of the lower nozzle structure of the present invention;
FIG. 9 is a schematic view of a nozzle structure according to the present invention;
FIG. 10 is a schematic diagram (front view and top view) of a backwater tub structure according to the present invention;
FIG. 11 is a schematic structural view (front view and top view) of the water diversion eye cover of the present invention;
FIG. 12 is a schematic view of the fitting and drill pipe connection structure of the present invention.
In the figure: 1. a connector body; 2. an upper connector; 3. a lower connector; 4. a water inlet cavity; 5. a lower water outlet cavity; 6. a shunt cavity; 7. a reverse water outlet; 8. a reverse circulation line; 9. a forward circulation line; 10. a blind end; 11. an upper water outlet hole; 12. the V-shaped reverse pipelines are communicated; 13. a water diversion eye cover; 14. a base plate; 15. a side plate; 16. a forward circulating water tank; 17. a backwater trough plate; 18. a lower nozzle; 19. a middle nozzle; 20. a lower accumulation section; 21. an upper release section; 22. a drill stem; 23. and (5) drilling a hole for sinking.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1-12, the reverse circulation joint applied to the geological exploration drilling tool comprises a tubular joint body 1, wherein an upper connector 2 and a lower connector 3 which are matched and connected with a drill rod 22 are respectively arranged at the upper end and the lower end of the tubular joint body; an upper water inlet cavity 4 is formed in the upper end of the joint body 1, a lower water outlet cavity 5 is formed in the lower end of the joint body 1, a shunting cavity 6 is formed between the lower water outlet cavity 5 and the upper water inlet cavity 4, and the upper end of the lower water outlet cavity 5 is communicated with the shunting cavity 6; a reverse water outlet 7 with an upward water outlet direction is formed in the side wall of the joint body 1, the reverse water outlet 7 is communicated with the diversion cavity 6 through a reverse circulation pipeline 8, and the upper water inlet cavity 4 is communicated with the diversion cavity 6 through a forward circulation pipeline 9; the reverse circulation pipeline 8 is not directly communicated with the forward circulation pipeline 9; the pipe diameter of the forward circulating pipeline 9 is larger than the aperture of the upper opening of the lower water outlet cavity 5.
The bottom of the upper water inlet cavity 4 is a blind end 10, two sides of the blind end 10 are both provided with upper water outlet holes 11, two side walls of the joint body 1 are respectively provided with a forward circulating pipeline 9, and the two upper water outlet holes 11 are respectively communicated with upper ports of the two forward circulating pipelines 9; the lower ports of the two forward circulating pipelines 9 are communicated with the diversion cavity 6.
Two reverse water outlets 7 are symmetrically formed in the side wall of the joint body 1, the reverse circulation pipeline 8 is arranged in the middle of the joint body 1, a lower port is communicated with the diversion cavity 6, an upper port is communicated 12 with the V-shaped reverse pipeline, and an outlet of the V-shaped reverse pipeline is communicated with the reverse water outlets 7.
A water diversion eye cover 13 is arranged outside the water return outlet 7, the water diversion eye cover 13 comprises a bottom plate 14 and a side plate 15, and the side plate 15 is arc-shaped; two ends of the bottom plate 14 are welded on the side wall of the joint body 1, and the bottom of the side plate 15 and the side wall of the joint body 1 are enclosed and welded to form a blind end 10; the water diversion eyeshade 13 is matched with the side wall of the connector body 1 to form an eyeshade reverse water outlet 7, and the water outlet direction of the eyeshade reverse water outlet 7 is upward.
The forward circulating pipeline 9 is formed by enclosing a forward circulating water tank 16 and a water return tank plate 17 which are arranged on the side wall of the joint body 1, and the outer edge of the water return tank plate 17 is welded on the side wall of the joint body 1.
A lower nozzle 18 is arranged in the lower water outlet cavity 5, and the inner cavity of the lower nozzle 18 is a conical inner cavity with a narrow upper part and a wide lower part;
the reverse circulation pipeline 8 is internally connected with a middle nozzle 19, the middle nozzle 19 comprises a lower gathering section 20 and an upper releasing section 21, the inner cavity of the lower gathering section 20 is a conical inner cavity with a narrow top and a wide bottom, and the inner cavity of the upper releasing section 21 is a conical inner cavity with a wide top and a narrow bottom.
Go up connector 2 and lower connector 3 and be outer awl threaded connection head.
Example 1
A reverse circulation joint applied to a geological exploration drilling tool comprises a tubular joint body 1, wherein an upper connector 2 and a lower connector 3 which are matched and connected with a drill rod 22 are respectively arranged at the upper end and the lower end of the tubular structure body; an upper water inlet cavity 4 is formed in the upper end of the joint body 1, a lower water outlet cavity 5 is formed in the lower end of the joint body 1, a shunting cavity 6 is formed between the lower water outlet cavity 5 and the upper water inlet cavity 4, and the upper end of the lower water outlet cavity 5 is communicated with the shunting cavity 6; a reverse water outlet 7 with an upward water outlet direction is formed in the side wall of the joint body 1, the reverse water outlet 7 is communicated with the diversion cavity 6 through a reverse circulation pipeline 8, and the upper water inlet cavity 4 is communicated with the diversion cavity 6 through a forward circulation pipeline 9; the reverse circulation pipeline 8 is not directly communicated with the forward circulation pipeline 9; the pipe diameter of the forward circulating pipeline 9 is larger than the aperture of the upper opening of the lower water outlet cavity 5.
The bottom of the upper water inlet cavity 4 is a blind end 10, two sides of the blind end 10 are both provided with upper water outlet holes 11, two side walls of the joint body 1 are respectively provided with a forward circulating pipeline 9, and the two upper water outlet holes 11 are respectively communicated with upper ports of the two forward circulating pipelines 9; the lower ports of the two forward circulating pipelines 9 are communicated with the diversion cavity 6.
Two reverse water outlets 7 are symmetrically formed in the side wall of the joint body 1, the reverse circulation pipeline 8 is arranged in the middle of the joint body 1, a lower port is communicated with the diversion cavity 6, an upper port is communicated 12 with the V-shaped reverse pipeline, and an outlet of the V-shaped reverse pipeline is communicated with the reverse water outlets 7.
Example 2
According to further optimization of the embodiment 1, a water diversion eye cover 13 is arranged outside the water return outlet 7, the water diversion eye cover 13 comprises a bottom plate 14 and a side plate 15, and the side plate 15 is arc-shaped; two ends of the bottom plate 14 are welded on the side wall of the joint body 1, and the bottom of the side plate 15 and the side wall of the joint body 1 are enclosed and welded to form a blind end 10; the water diversion eyeshade 13 is matched with the side wall of the connector body 1 to form an eyeshade reverse water outlet 7, and the water outlet direction of the eyeshade reverse water outlet 7 is upward.
The forward circulating pipeline 9 is formed by enclosing a forward circulating water tank 16 and a water return tank plate 17 which are arranged on the side wall of the joint body 1, and the outer edge of the water return tank plate 17 is welded on the side wall of the joint body 1.
A lower nozzle 18 is arranged in the lower water outlet cavity 5, and the inner cavity of the lower nozzle 18 is a conical inner cavity with a narrow upper part and a wide lower part;
the reverse circulation pipeline 8 is internally connected with a middle nozzle 19, the middle nozzle 19 comprises a lower gathering section 20 and an upper releasing section 21, the inner cavity of the lower gathering section 20 is a conical inner cavity with a narrow top and a wide bottom, and the inner cavity of the upper releasing section 21 is a conical inner cavity with a wide top and a narrow bottom.
Go up connector 2 and connector 3 down and be outer awl threaded connection head
When the reverse circulation joint is used, the reverse circulation joint is connected between drill rods 22, then conventional drilling is carried out, water flows in from the drill rods 22 at the upper part of the reverse circulation joint, and sequentially enters the diversion cavity 6 from the upper water inlet cavity 4 and the forward circulation pipeline 9, and as the pipe diameter of the forward circulation pipeline 9 is larger than the upper opening aperture of the lower water outlet cavity 5 (actually, the upper opening aperture of the lower nozzle 18), the water flows in the upper part of the lower water outlet cavity 5 and meets flowing resistance and generates rebound, so that the water flows are diverted at the diversion cavity 6;
one way is discharged from the lower water outlet cavity 5 (the lower nozzle 18) according to the flow direction from the forward circulating pipeline 9, enters the drill stem 22 at the lower part of the reverse circulating joint, reaches the drill bit, and then flows back to the ground from the gap between the drill stem 22 and the drill hole;
in the other path, after being extruded and rebounded from the diversion cavity 6, the water flows in the reverse circulation pipeline 8 along the lower gathering section 20 and the upper releasing section 21 of the middle nozzle 19, is discharged from the two reverse water outlets 7 under the diversion of the V-shaped reverse pipeline, and forms an upward reverse water flow between the drill rod 22 and the drill hole in the water outlet direction of the water flow under the guidance of the wind-water eye shield, so that the water slurry deposited between the drill rod 22 and the drill hole is accelerated to be carried out of the ground, and the slurry (particularly the slurry with large sand content or the slurry with the drill hole recess 23) can be effectively driven to flow due to the large water outlet amount of the reverse water outlets 7, so that the slurry is prevented from being deposited and cannot be effectively discharged.
Because the joints are connected on the drill rod and positioned in the middle of the drilling hole, the water flow is in the position, the water flow pressure is higher, a larger backflow siphon effect can be generated, and the backflow of the whole slurry is driven.
The joint of the application is suitable for full bit drilling, especially in the case of sandstone in the geology.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the technical principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the invention.
Claims (3)
1. The utility model provides a be applied to reverse circulation of geological exploration drilling tool connects which characterized in that: the drill pipe joint comprises a tubular joint body, wherein an upper connector and a lower connector which are connected with a drill pipe in a matched manner are respectively arranged at the upper end and the lower end of the tubular joint body; an upper water inlet cavity is formed in the upper end of the joint body, a lower water outlet cavity is formed in the lower end of the joint body, a shunting cavity is formed between the lower water outlet cavity and the upper water inlet cavity, and the upper end of the lower water outlet cavity is communicated with the shunting cavity; a reverse water outlet with an upward water outlet direction is formed in the side wall of the joint body, the reverse water outlet is communicated with the flow dividing cavity through a reverse circulation pipeline, and the upper water inlet cavity is communicated with the flow dividing cavity through a forward circulation pipeline; the reverse circulation pipeline is not directly communicated with the forward circulation pipeline; the pipe diameter of the forward circulating pipeline is larger than the aperture of an upper opening of the lower water outlet cavity;
the bottom of the upper water inlet cavity is a blind end, upper water outlet holes are formed in two sides of the blind end, forward circulating pipelines are respectively arranged on two side walls of the joint body, and the two upper water outlet holes are respectively communicated with ports of the two forward circulating pipelines; the lower ports of the two forward circulating pipelines are communicated with the flow dividing cavity;
the reverse water outlets are symmetrically formed in the side wall of the joint body, the reverse circulation pipeline is arranged in the middle of the joint body, the lower port is communicated with the diversion cavity, the upper port is communicated with the V-shaped reverse pipeline, and the outlet of the V-shaped reverse pipeline is communicated with the reverse water outlets;
a water diversion eyeshade is arranged outside the reverse water outlet and comprises a bottom plate and a side plate, and the side plate is arc-shaped; the two ends of the side plate are welded on the side wall of the joint body, and the bottom plate, the bottom of the side plate and the side wall of the joint body are welded in an enclosing manner to form a blind end; the water diversion eyeshade is matched with the side wall of the connector body to form an eyeshade reverse water outlet, and the eyeshade reverse water outlet is upward;
the forward circulating pipeline is formed by enclosing a forward circulating water tank and a water return tank plate which are arranged on the side wall of the joint body, and the outer edge of the water return tank plate is welded on the side wall of the joint body;
the reverse circulation pipeline is internally connected with a middle nozzle, the middle nozzle comprises a lower gathering section and an upper releasing section, the inner cavity of the lower gathering section is a conical inner cavity with a narrow top and a wide bottom, and the inner cavity of the upper releasing section is a conical inner cavity with a wide top and a narrow bottom.
2. The reverse circulation joint for use in a geological exploration drilling tool as claimed in claim 1 wherein: the lower water outlet cavity is internally provided with a lower nozzle, and the inner cavity of the lower nozzle is a conical inner cavity with a narrow upper part and a wide lower part.
3. The reverse circulation joint for use in a geological exploration drilling tool as claimed in claim 1 wherein: the upper connector and the lower connector are both outer cone threaded connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257943.5A CN109973025B (en) | 2019-04-01 | 2019-04-01 | Reverse circulation joint applied to geological exploration drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910257943.5A CN109973025B (en) | 2019-04-01 | 2019-04-01 | Reverse circulation joint applied to geological exploration drilling tool |
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| Publication Number | Publication Date |
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| CN109973025A CN109973025A (en) | 2019-07-05 |
| CN109973025B true CN109973025B (en) | 2021-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910257943.5A Active CN109973025B (en) | 2019-04-01 | 2019-04-01 | Reverse circulation joint applied to geological exploration drilling tool |
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| CN111101862B (en) * | 2019-12-31 | 2021-06-15 | 上海交通大学 | Pumpless drilling tool suitable for underwater operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2496160A1 (en) * | 1980-12-11 | 1982-06-18 | Lamothe Andre | Sealed connector for deep drilling tools - where drilling liq. can be fed to tool, or another liq. can be fed into drilled hole without reaching the tool |
| CN2388341Y (en) * | 1999-08-18 | 2000-07-19 | 杜晓瑞 | Forced reverse circulation fisher |
| CN201687408U (en) * | 2009-11-24 | 2010-12-29 | 中国石油集团川庆钻探工程有限公司 | Diversion joint |
| CN202417368U (en) * | 2011-12-19 | 2012-09-05 | 中国人民解放军63653部队 | Oscillatory spray type reverse-circulating coring device |
| CN203626656U (en) * | 2013-11-15 | 2014-06-04 | 中国石油天然气股份有限公司 | Positive cycle multi-injector negative pressure generator |
| CN109236222A (en) * | 2018-01-30 | 2019-01-18 | 无锡锡钻地质装备有限公司 | A kind of advanced drilling tool |
-
2019
- 2019-04-01 CN CN201910257943.5A patent/CN109973025B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2496160A1 (en) * | 1980-12-11 | 1982-06-18 | Lamothe Andre | Sealed connector for deep drilling tools - where drilling liq. can be fed to tool, or another liq. can be fed into drilled hole without reaching the tool |
| CN2388341Y (en) * | 1999-08-18 | 2000-07-19 | 杜晓瑞 | Forced reverse circulation fisher |
| CN201687408U (en) * | 2009-11-24 | 2010-12-29 | 中国石油集团川庆钻探工程有限公司 | Diversion joint |
| CN202417368U (en) * | 2011-12-19 | 2012-09-05 | 中国人民解放军63653部队 | Oscillatory spray type reverse-circulating coring device |
| CN203626656U (en) * | 2013-11-15 | 2014-06-04 | 中国石油天然气股份有限公司 | Positive cycle multi-injector negative pressure generator |
| CN109236222A (en) * | 2018-01-30 | 2019-01-18 | 无锡锡钻地质装备有限公司 | A kind of advanced drilling tool |
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| CN109973025A (en) | 2019-07-05 |
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