CN104747103A - Shear pin filtrator - Google Patents
Shear pin filtrator Download PDFInfo
- Publication number
- CN104747103A CN104747103A CN201510076005.7A CN201510076005A CN104747103A CN 104747103 A CN104747103 A CN 104747103A CN 201510076005 A CN201510076005 A CN 201510076005A CN 104747103 A CN104747103 A CN 104747103A
- Authority
- CN
- China
- Prior art keywords
- cylindrical shell
- filtering bodies
- hanging sleeve
- barrel
- filtrator
- 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.)
- Granted
Links
- 238000001914 filtration Methods 0.000 claims abstract description 52
- 238000009434 installation Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 10
- 239000007790 solid phase Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
Classifications
-
- 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
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/002—Down-hole drilling fluid separation systems
Landscapes
- 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 shear pin filtrator. The shear pin filtrator comprises a barrel and a filtrator assembly arranged inside the barrel. The upper end and the lower end of the barrel are provided with threads. The filtrator assembly comprises a filtering body, a centering device, a hanging sleeve and a limiting sleeve. The lower end of the filtering body is fixedly connected with the centering device. The centering device is slidably connected with the barrel. An overflowing channel is formed between the centering device and the filtering body. Filtering holes are formed in the centering device and the filtering body. An annular space is formed between the barrel and the filtering body. The upper end of the filtering body is connected with the hanging sleeve through shear pins. The hanging sleeve is fixed inside the barrel. The upper end of the filtering body is provided with multiple pressure relieving holes which are evenly distributed in the circumferential direction. The shear pin filtrator has the advantages that the performance is reliable, the utilization is safe, harmful solidoids in mud can be removal by filtration, the safe and stable operation of downhole precise instruments is guaranteed, the labor intensity of working personnel can be lowered, the applicability is high, and the installation is convenient.
Description
Technical field
The present invention relates to oil gas field and bore completion technique field, particularly a kind ofly cut off strainer for drilling rod.
Background technology
In current Offshore Operation process, when precision instrument operation (logging operation, directional well operation etc.) is carried in drilling assembly bottom, these precision instruments require very high to mud, and therefore, needing special equipment to mud filters; And now the marine most 5-1/2 ＂ drilling rod button-types used for HT55 and most 5-7/8 ＂ drilling rod button-type be XT57, these two kinds of button-types do not place the space of conventional filter core; Simultaneously along with the development of science and technology, present most offshore boring island mostly uses iron driller to replace rigger's operation in the past, when conventional filter core will be laid in drill rod stand column, it is on duty that just must arrange special messenger to arrive quadruple board platform, the working strength of rigger certainly will be increased like this, therefore design a kind of universal filter, namely can be harmful to solid phase in filtering mud, ensure underground precision instrument safe and stable operation, to meet operation on the sea demand; The working strength of rigger can be reduced again, reduce unnecessary operation procedure and seem particularly important.
Summary of the invention
The present invention for solve in known technology the technical problem that exists and a kind of easy for installation, highly versatile, dependable performance, use safety be provided cut off strainer.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is: one cuts off strainer, the filter assembly comprising cylindrical shell and install therein; The upper and lower side of described cylindrical shell is provided with screw thread; Described filter assembly comprises filtering bodies, centralizer, hanging sleeve and stop collar, described centralizer is connected with in the lower end of described filtering bodies, described centralizer and described cylindrical shell are slidably connected, between described centralizer and described filtering bodies, be formed with flow channels, described centralizer and described filtering bodies are provided with filter bores; Between described cylindrical shell and described filtering bodies, be formed with annular space, the upper end of described filtering bodies is connected by shear pin with described hanging sleeve, and described hanging sleeve is fixed in described cylindrical shell, is provided with circumferentially uniform some relief holes in the upper end of described filtering bodies.
Be provided with jump ring in the upper end of described filtering bodies, described jump ring is positioned at the below of described shear pin.
The upper end of described hanging sleeve is located by circlip for hole, and described circlip for hole is arranged in described cylindrical shell, and the lower end of described hanging sleeve is located by the upper end of stop collar, and the lower end of described stop collar is sitting on the convex step of described cylindrical shell.
The upper end of described cylindrical shell is provided with internal thread, and the lower end of described cylindrical shell is provided with external screw thread.
Not etc., the internal diameter of corresponding filtering bodies upper end cylindrical shell is not less than the internal diameter of the cylindrical shell of corresponding filtering bodies other parts for the internal diameter of described cylindrical shell.
The advantage that the present invention has and good effect are: adopt the structure be arranged on by filter assembly in cylindrical shell, joint style is adopted to be connected with drilling rod, install very convenient, can complete fast at well head, also can be connected on drilling rod in advance, make staff need not go up quadruple board platform to go to install, the labour intensity of staff can be reduced; Filter assembly is arranged on the structure in cylindrical shell by employing, enables the present invention be suitable for all drilling rods, highly versatile; Adopt the structure that relief hole is set in filtering bodies upper end, in filtration intracoelomic cavity is by mud, harmful solid phase is filled up, after shear pin is cut off, mud is enable to flow to the annular space between cylindrical shell and filtering bodies from relief hole, and then from discharge filter filtering bodies, thus guarantee that rig pump pressure is stablized, downhole tool applications is stablized.In sum, dependable performance of the present invention, use safety, both can harmful solid phase in filtering mud, ensured underground precision instrument safe and stable operation, to meet operation on the sea demand; Intensity of workers can be reduced again, the difficult problem that the conventional filter core scope of application is narrow can also be solved, have applicability strong, safe and reliable, labor strength can be reduced, increase work efficiency and the multiple advantages such as tool performance is permanently effective can be ensured.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1.
In figure: 1, cylindrical shell; 2, circlip for hole; 3, shear pin; 4, jump ring; 5, hanging sleeve; 6, stop collar; 7, filtering bodies; 8, filter bores; 9, relief hole; 10, annular space; 11, centralizer; 12, flow channels.
Detailed description of the invention
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1 and Fig. 2, one cuts off strainer, the filter assembly comprising cylindrical shell 1 and install therein; The upper and lower side of described cylindrical shell 1 is provided with screw thread; Described filter assembly comprises filtering bodies 7, centralizer 11, hanging sleeve 5 and stop collar 6, described centralizer 11 is connected with in the lower end of described filtering bodies 7, described centralizer 11 is slidably connected with described cylindrical shell 1, between described centralizer 11 and described filtering bodies 1, be formed with flow channels 12, described centralizer 11 and described filtering bodies 7 are provided with filter bores 8; Annular space 10 is formed between described cylindrical shell 1 and described filtering bodies 7, the upper end of described filtering bodies 7 is connected by shear pin 3 with described hanging sleeve 5, described hanging sleeve 5 is fixed in described cylindrical shell 1, is provided with circumferentially uniform some relief holes 8 in the upper end of described filtering bodies 7.In the present embodiment, relief hole 8 has 6.
In the present embodiment, in order to fix the axial location of hanging sleeve 5 further, be provided with jump ring 4 in the upper end of described filtering bodies 7, described jump ring 4 is positioned at the below of described shear pin 3.In the present embodiment, the axial fixing structure of hanging sleeve 5 is: the upper end of described hanging sleeve 5 is located by circlip for hole 2, described circlip for hole 2 is arranged in described cylindrical shell 1, the lower end of described hanging sleeve 5 is located by the upper end of stop collar 6, and the lower end of described stop collar 6 is sitting on the convex step of described cylindrical shell 1.In order to easy to use, in the present embodiment, the upper end of described cylindrical shell 1 is provided with internal thread, and the lower end of described cylindrical shell 1 is provided with external screw thread.In order to strengthen pressure relief capability, in the present embodiment, not etc., the internal diameter of corresponding filtering bodies upper end cylindrical shell is not less than the internal diameter of the cylindrical shell of corresponding filtering bodies other parts for the internal diameter of described cylindrical shell 1, during to make pressure release, the annular space between described cylindrical shell 1 and described filtering bodies 7 is larger.
Operating principle of the present invention is:
During drilling well, in mud, harmful solid phase is filtered by the filtering bodies 7 cut off in strainer, thus ensure that the safe and stable operation of underground precision instrument, meets operation on the sea demand; Along with drilling time is passed backward, cut off the harmful solid phase in filtering bodies 7 inside in strainer to continue to pile up, after solid phase harmful in mud fills up whole filtering bodies 7, runner can narrow, pump pressure can uprise, thus cause and to cut off in strainer pressure and increase, along with pressure durations increases, shear pin 3 is cut off, thus filtering bodies 7 is moved down, relief hole 9 is communicated with the annular space 10 between filtering bodies 7 and cylindrical shell 1, and mud flow to annular space 10 from relief hole 10, through flow channels 12 discharge filter.Thus guarantee that pump pressure is stablized, ensure downhole tool applications safety and stability; Cutting off strainer can be connected on drilling rod simultaneously in advance, does not need like this to arrange special messenger on duty to quadruple board platform, therefore can alleviate workman's working strength.
Although be described the preferred embodiments of the present invention by reference to the accompanying drawings above; but the present invention is not limited to above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that present inventive concept and claim protect, can also make a lot of form, these all belong within protection scope of the present invention.
Claims (5)
1. cut off a strainer, it is characterized in that, the filter assembly comprising cylindrical shell and install therein; The upper and lower side of described cylindrical shell is provided with screw thread; Described filter assembly comprises filtering bodies, centralizer, hanging sleeve and stop collar, described centralizer is connected with in the lower end of described filtering bodies, described centralizer and described cylindrical shell are slidably connected, between described centralizer and described filtering bodies, be formed with flow channels, described centralizer and described filtering bodies are provided with filter bores; Between described cylindrical shell and described filtering bodies, be formed with annular space, the upper end of described filtering bodies is connected by shear pin with described hanging sleeve, and described hanging sleeve is fixed in described cylindrical shell, is provided with circumferentially uniform some relief holes in the upper end of described filtering bodies.
2. according to claim 1ly cut off strainer, it is characterized in that, be provided with jump ring in the upper end of described filtering bodies, described jump ring is positioned at the below of described shear pin.
3. according to claim 1ly cut off strainer, it is characterized in that, the upper end of described hanging sleeve is located by circlip for hole, described circlip for hole is arranged in described cylindrical shell, the lower end of described hanging sleeve is located by the upper end of stop collar, and the lower end of described stop collar is sitting on the convex step of described cylindrical shell.
4. according to claim 1ly cut off strainer, it is characterized in that, the upper end of described cylindrical shell is provided with internal thread, and the lower end of described cylindrical shell is provided with external screw thread.
5. according to claim 1ly cut off strainer, it is characterized in that, not etc., the internal diameter of corresponding filtering bodies upper end cylindrical shell is not less than the internal diameter of the cylindrical shell of corresponding filtering bodies other parts for the internal diameter of described cylindrical shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076005.7A CN104747103B (en) | 2015-02-12 | 2015-02-12 | Cut off filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076005.7A CN104747103B (en) | 2015-02-12 | 2015-02-12 | Cut off filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104747103A true CN104747103A (en) | 2015-07-01 |
| CN104747103B CN104747103B (en) | 2017-03-15 |
Family
ID=53587282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510076005.7A Active CN104747103B (en) | 2015-02-12 | 2015-02-12 | Cut off filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104747103B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915051A (en) * | 2019-03-19 | 2019-06-21 | 中国海洋石油集团有限公司 | A kind of pressure filter for drilling-fluid circulation system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428428A (en) * | 1981-12-22 | 1984-01-31 | Dresser Industries, Inc. | Tool and method for gravel packing a well |
| CN2736522Y (en) * | 2004-10-01 | 2005-10-26 | 中国石化胜利油田有限公司采油工艺研究院 | Filter |
| CN101280673A (en) * | 2008-05-26 | 2008-10-08 | 安东石油技术（集团）有限公司 | Filtering type by-pass valve assembly |
| CN201170091Y (en) * | 2008-02-03 | 2008-12-24 | 梁文瑞 | Anti-pollution sand spraying device capable of re-washing |
| CN203547609U (en) * | 2013-11-18 | 2014-04-16 | 中国石油大学(华东) | Single-flow type PDM drill by-pass valve |
-
2015
- 2015-02-12 CN CN201510076005.7A patent/CN104747103B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4428428A (en) * | 1981-12-22 | 1984-01-31 | Dresser Industries, Inc. | Tool and method for gravel packing a well |
| CN2736522Y (en) * | 2004-10-01 | 2005-10-26 | 中国石化胜利油田有限公司采油工艺研究院 | Filter |
| CN201170091Y (en) * | 2008-02-03 | 2008-12-24 | 梁文瑞 | Anti-pollution sand spraying device capable of re-washing |
| CN101280673A (en) * | 2008-05-26 | 2008-10-08 | 安东石油技术（集团）有限公司 | Filtering type by-pass valve assembly |
| CN203547609U (en) * | 2013-11-18 | 2014-04-16 | 中国石油大学(华东) | Single-flow type PDM drill by-pass valve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109915051A (en) * | 2019-03-19 | 2019-06-21 | 中国海洋石油集团有限公司 | A kind of pressure filter for drilling-fluid circulation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104747103B (en) | 2017-03-15 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20170119 Address after: 100027 Beijing city Dongcheng District Dongzhimen Street No. 6 Applicant after: CNOOC Energy Technology Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Energy Technology Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |