CN101530692A - Drilling tool filter screen for realizing protection of internal wall of drilling tool - Google Patents
Drilling tool filter screen for realizing protection of internal wall of drilling tool Download PDFInfo
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- CN101530692A CN101530692A CN200910047090A CN200910047090A CN101530692A CN 101530692 A CN101530692 A CN 101530692A CN 200910047090 A CN200910047090 A CN 200910047090A CN 200910047090 A CN200910047090 A CN 200910047090A CN 101530692 A CN101530692 A CN 101530692A
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- drilling tool
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- drilling
- filter
- internal wall
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Abstract
The invention relates to a drilling tool filter screen for realizing protection of the internal wall of a drilling tool. The drilling tool filter screen is arranged at the upper part of a small end of the internal thread of the drilling tool and an opening thereof faces downward; the drilling tool filter screen adopts a mode that drilling fluid flows into an inner cavity of the filter screen by filter holes on the filter screen from the outer part of the filter screen to filter impurities. The drilling tool filter screen for protecting the internal wall of the drilling tool guarantees that the impurities in the drilling fluid are filtered, simultaneously can protect the internal wall of the drilling tool effectively, reduce drilling tool accidents caused by washing out and abrasion of the drilling fluid to the internal wall of the drilling tool, prolong the service life of the drilling tool and can be widely applied to fields of drilling operation of petroleum gas.
Description
Technical field
The present invention relates to a kind of drilling tool filter screen, relate in particular to a kind of drilling tool filter screen of protecting the drilling tool inwall.
Background technology
In present petroleum drilling operation, for guaranteeing precision, complicated go into well downhole tool instrument operate as normal, avoiding impurity to stop up, generally adopt the mode that the drilling tool filter screen is installed on drilling tool to filter and enter the impurity in the drilling fluid in the drilling tool, and then avoid the down-hole complexity that impurity obstruction drilling tool hydrophthalmia causes in the drilling fluid.See also Fig. 1, present conventional drilling tool filter screen 31 hangs on the step 32 at drilling tool internal thread small end place, and the opening direction of filter screen makes progress, and this opening is the inlet that drilling fluid enters the drilling tool filter screen.Filter screen is installed in down in the hydrophthalmia of drilling tool 33.Drilling fluid flows into the filter screen inner chamber from the filter screen opening part, because the effect of filter opening, the impurity diameter just can't pass through filter opening greater than the filter opening diameter in the drilling fluid, these impurity are retained in the filter screen inner chamber, drilling fluid then flows out from inner chamber by the filter opening on the filter screen and enters down in the hydrophthalmia of drilling tool 33, reaches the purpose of impurity screening.
Yet in actual use, there is following problem in conventional drilling tool filter screen:
(1) when impurity is too much in the drilling fluid, impurity can stop up the filter opening of filter screen bottom, and drilling fluid can only flow out from the filter opening on filter screen top, can reduce by the filter opening sectional area of fluid after filter screen stops up, and the speed of drilling fluid outflow filter opening will be accelerated.
(2) structure of conventional filter screen has determined the direction that drilling fluid flows out the drilling tool filter screen to be vertical or to favour the drilling tool inwall with operation principle, the drilling fluid that flows out filter screen can directly be washed into the drilling tool inwall and cause the drilling tool wearing and tearing, make that the service life of drilling tool is short, and the drilling tool accident that causes because of drilling tool failure takes place easily.
Summary of the invention
The object of the present invention is to provide a kind of drilling tool filter screen of protecting the drilling tool inwall, to solve the drilling fluid that exists in the prior art to the drilling tool inwall washes away greatly, drilling tool accident lacked and take place easily service life by drilling tool technical problem.
For achieving the above object; the invention provides a kind of drilling tool filter screen of protecting the drilling tool inwall, comprising: stabilizing ring, filter screen and supporting seat, filter screen are connected with supporting seat with stabilizing ring respectively; filter screen is funnel-form, and the diameter of the end that it is connected with stabilizing ring is less than the diameter of its end that is connected with supporting seat.
According to the drilling tool filter screen of the described protection drilling tool of preferred embodiment of the present invention inwall, its supporting seat in axial direction is provided with one in order to the internal openings as the outlet of the drilling fluid after filtering.
The drilling tool filter screen of protection drilling tool inwall of the present invention is fixed in drilling tool hydrophthalmia 42 centers by stabilizing ring, can reduce the drilling tool accident that drilling tool inwall erosive wear is caused because of drilling fluid in the impurity in guaranteeing the filtration drilling fluid.Compared with prior art, the present invention has the following advantages:
(1) impurity that goes out by this drilling tool strainer filtering is retained between filter screen outer wall and the drilling tool inwall, when the drilling fluid after filtering enters the drilling tool hydrophthalmia from the downward outflow of drilling tool filter screen inner chamber, filter screen exit free from admixture is piled up, the sectional area of filter screen outlet remains unchanged, thereby has guaranteed drilling fluid flow speed stability when flowing out the drilling tool filter screen.
(2) drilling fluid after the filtration is consistent with the direction of drilling tool inner flow passage from the flow direction that the drilling tool filter screen flows out, can directly not wash away the drilling tool inwall, the drilling fluid flow velocity of Liu Chuing is stable again, thus alleviated when drilling fluid flows out filter screen erosive wear to the drilling tool inwall, prolonged drilling tool service life, reduced the drilling tool accident that causes drilling tool failure to cause because of the drilling tool inner wall abrasion.
Description of drawings:
Fig. 1 is the installation situation schematic diagram of existing filter screen;
Fig. 2 is the half of sectional structure schematic diagram of the drilling tool filter screen of protection drilling tool inwall of the present invention;
Fig. 3 is the installation situation schematic diagram of invention filter screen.
The specific embodiment:
Below in conjunction with accompanying drawing, specify the present invention.
Core of the present invention is: the drilling tool filter screen of protection drilling tool inwall takes drilling fluid to flow into the mode impurity screening of filter screen inner chamber by the filter opening on the filter screen from the outside of filter screen.
See also Fig. 2; a kind of drilling tool filter screen of protecting the drilling tool inwall comprises: stabilizing ring 1, filter screen 2 and supporting seat 3, filter screen 2 are connected with supporting seat 3 with stabilizing ring 1 respectively; filter screen 2 is funnel-form, and the diameter of the end that it is connected with stabilizing ring 1 is less than the diameter of its end that is connected with supporting seat 3.Filter screen 2 also can be cylindrical.
In this example, supporting seat 3 in axial direction is provided with one in order to the internal openings 4 as the outlet of the drilling fluid after filtering.
When the drilling tool filter screen of protection drilling tool inwall of the present invention uses; supporting seat 3 is installed on the step of drilling tool internal thread small end 32, fixes the position of this drilling tool filter screen, simultaneously; guarantee that by stabilizing ring 1 filter screen 2 is positioned at drilling tool hydrophthalmia center, and when the work of filtration, keep filter screen 2 stable.
See also Fig. 3, the installation situation schematic diagram of filter screen of the present invention.Drilling tool filter screen 5 is arranged on the top of the female screw small end 32 of drilling tool, and during duty, the opening of drilling tool filter is positioned at drilling tool filter screen foot, and it takes drilling fluid to flow into the mode impurity screening of filter screen inner chamber by the filter opening on the filter screen from the outside of filter screen.Drilling tool filter screen 5 be arranged on last drilling tool 41 in, can protect drilling tool inwall 43. better
The drilling tool filter screen of protection drilling tool inwall of the present invention is when filtering drilling fluid; impure drilling fluid flows in drilling tool hydrophthalmia 42 from top to bottom; stabilizing ring 1 through the drilling tool filter screen; flow to filter screen 2; filtration by filter screen 2; impurity greater than filter opening 21 diameters can't flow into the filter screen inner chamber with drilling fluid by filter opening 21; thereby be filtered out and be retained between filter screen outer wall 22 and the drilling tool inwall; drilling fluid after the filtration flows into the filter screen inner chamber from filter screen outer wall 22 by filter opening 21; continue to flow to the internal openings 4 of supporting seat 3 downwards; and flow into drilling tool hydrophthalmia 42 once more by internal openings 4, finish filter process.
The present invention has the following advantages:
(1) impurity that goes out by this drilling tool strainer filtering is retained between filter screen outer wall and the drilling tool inwall, when the drilling fluid after filtering enters the drilling tool hydrophthalmia from the downward outflow of drilling tool filter screen inner chamber, filter screen exit free from admixture is piled up, the sectional area of filter screen outlet remains unchanged, thereby has guaranteed drilling fluid flow speed stability when flowing out the drilling tool filter screen.
(2) drilling fluid after the filtration is consistent with the direction of drilling tool inner flow passage from the flow direction that the drilling tool filter screen flows out, can directly not wash away the drilling tool inwall, the drilling fluid flow velocity of Liu Chuing is stable again, thus alleviated when drilling fluid flows out filter screen erosive wear to the drilling tool inwall, prolonged drilling tool service life, reduced the drilling tool accident that causes drilling tool failure to cause because of the drilling tool inner wall abrasion.
The drilling tool filter screen of protection drilling tool inwall of the present invention can also be protected the drilling tool inwall in the impurity effectively in guaranteeing the filtration drilling fluid; the drilling tool accident that minimizing causes drilling tool inwall erosive wear because of drilling fluid; prolong the service life of drilling tool, can be widely used in oil and gas well drilling operation field.
More than disclosed only be several specific embodiment of the present invention, but the present invention is not limited thereto, any those skilled in the art can think variation, all should drop in protection scope of the present invention.
Claims (4)
1, a kind of drilling tool filter screen of realizing protecting the drilling tool inwall; it is characterized in that; the opening of its drilling tool filter screen in working order the time is positioned at drilling tool filter screen foot, and it takes drilling fluid to flow into the mode impurity screening of filter screen inner chamber by the filter opening on the filter screen from the outside of filter screen.
2, drilling tool filter screen as claimed in claim 1, it is characterized in that, comprise: stabilizing ring, filter screen and supporting seat, described filter screen is connected with supporting seat with described stabilizing ring respectively, and described opening is to be arranged on supporting seat in axial direction to go up in order to the internal openings as the drilling fluid outlet after filtering.
3, drilling tool filter screen as claimed in claim 1 or 2 is characterized in that, described filter screen is funnel-form, and the diameter of the end that it is connected with described stabilizing ring is less than the diameter of its end that is connected with described supporting seat.
4, drilling tool filter screen as claimed in claim 1 is characterized in that, it is arranged on the top of drilling tool internal thread small end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047090A CN101530692A (en) | 2009-03-05 | 2009-03-05 | Drilling tool filter screen for realizing protection of internal wall of drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910047090A CN101530692A (en) | 2009-03-05 | 2009-03-05 | Drilling tool filter screen for realizing protection of internal wall of drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101530692A true CN101530692A (en) | 2009-09-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910047090A Pending CN101530692A (en) | 2009-03-05 | 2009-03-05 | Drilling tool filter screen for realizing protection of internal wall of drilling tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN101530692A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922532A (en) * | 2021-01-26 | 2021-06-08 | 山东源运通矿山装备科技有限公司 | Spiral alloy drill bit |
| CN114904312A (en) * | 2022-05-20 | 2022-08-16 | 深圳越海工程技术有限公司 | Material of ground and underground high-performance drilling fluid filter screen and mesh arrangement optimization method |
-
2009
- 2009-03-05 CN CN200910047090A patent/CN101530692A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922532A (en) * | 2021-01-26 | 2021-06-08 | 山东源运通矿山装备科技有限公司 | Spiral alloy drill bit |
| CN114904312A (en) * | 2022-05-20 | 2022-08-16 | 深圳越海工程技术有限公司 | Material of ground and underground high-performance drilling fluid filter screen and mesh arrangement optimization method |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090916 |