CN2799834Y - Erosion resistance elbow for gas drilling - Google Patents
Erosion resistance elbow for gas drilling Download PDFInfo
- Publication number
- CN2799834Y CN2799834Y CN 200520108544 CN200520108544U CN2799834Y CN 2799834 Y CN2799834 Y CN 2799834Y CN 200520108544 CN200520108544 CN 200520108544 CN 200520108544 U CN200520108544 U CN 200520108544U CN 2799834 Y CN2799834 Y CN 2799834Y
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- CN
- China
- Prior art keywords
- flow guiding
- section
- erosion resistance
- gas drilling
- elbow
- 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.)
- Expired - Lifetime
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Abstract
The utility model relates to an erosion resistance elbow for gas drilling in the petroleum drilling field, which comprises an inlet flat flow guiding section 1, a spiral flow guiding bent section 2 and an outlet flat flow guiding section 3, wherein flow guiding sheets 4 are arranged in the inlet flat flow guiding section 1, the spiral flow guiding bent section 2 and the outlet flat flow guiding section 3; the inlet flat flow guiding section 1, the spiral flow guiding bent section 2 and the outlet flat flow guiding section 3 are connected by the flow guiding sheets 4. A spiral internal structure buffers the scouring effect of drill cuttings for the pipe wall of the erosion resistance elbow. Thus, even if the thickness of the pipe wall is not thickened, the service life of the erosion resistance elbow can be prolonged and the technical requirements of the gas drilling can be satisfied.
Description
Technical field
The utility model relates to field of oil drilling, specifically, is a kind of gas drilling erosion resistance elbow.
Background technology
The gas under balance pressure drilling is to utilize a kind of low-pressure drilling technology of gas (air, natural gas, nitrogen, diesel engine vent gas etc.) as circulatory mediator.Because gas density is very low; " negative pressure " effect can appear in drilling process; can not only prevent effectively that so external liquid phase substance and solid phase particles from entering the stratum; weaken or eliminate formation damage; and owing to eliminated " pressing special efficacy to answer " greatly; can increase substantially rate of penetration, simultaneously, reduce down hole problem (leakage and differential sticking etc.) in addition and realize drilling well safely and fast, in time find and estimate oil-gas reservoir, protection environment and reduce the advantages such as operating cost of well stimulation.Therefore, gas drilling the impetus of fast development occurred in recent years once the great attention that each major oil companies and relevant departments of national governments occur having caused, and its range of application is also more and more wider.But, many deficiencies of gas drilling have also been exposed in the practice process, quite serious as the erosive wear problem, this be because: compare with the liquid phase circulatory mediator, gaseous fluid (no matter being air, natural gas or diesel engine vent gas) is carried the ability of drilling cuttings will be well below the solids-carrying capacity of liquid phase fluid.Thereby in order to remove drilling cuttings effectively, keep the shaft bottom clean, must improve the circulation rate of gas phase media greatly.Experience shows that when carrying out gas drilling with rock bit, the upward velocity of gas will reach more than the 35m/s at least in the annular space, could make the drilling cuttings suspension effectively and carry out well.Carrying a large amount of and recyclegas drilling cuttings in irregular shape with like this high speed move upward (injection), just as the sandblast cutting, can cause serious erosive wear to tubing string, particularly the elbow can failure phenomenon seriously occur at short notice because of erosive wear, often cause bigger economic loss, for example elbow all successively repeatedly takes place and seriously lost efficacy because of erosion in Sichuan Petroleum Administration and long celebrating Petroleum Authority in carrying out the gas drilling work progress, because the gas drilling manifold is various, changing an elbow often needs time a few hours, has had a strong impact on carrying out smoothly and economic benefit of gas drilling.
Summary of the invention
The purpose of this utility model provides a kind of erosion resistance elbow that is applicable to gas drilling, its screw type internal construction has cushioned the souring of drilling cuttings to the elbow tube wall greatly, thereby,, also can prolong the application life of elbow greatly even pipe thickness is not thickeied.
The utility model is achieved in that and comprises the straight diversion section 1 of inlet, spiral stream guidance bending section 2, the straight diversion section 3 of outlet, enter the mouth and establish flow deflector 4 in straight diversion section 1, spiral stream guidance bending section 2, the straight diversion section 3 of outlet, connect by flow deflector 4 between the straight diversion section 1 that enters the mouth, spiral stream guidance bending section 2, the straight diversion section 3 of outlet.
Flow deflector 4 is a groove structure.
Flow deflector 4 is 4 to 8, the thickness of flow deflector 4 at 4mm between the 15mm.
The helical angle of spiral stream guidance bending section 2 is between 40 ° to 70 ° degree.
In order to realize task of the present utility model, two kinds of technological approaches have been adopted: 1. directly elbow inside is cast helical form with the method for casting; 2. at helical form liner that is cast into elastic caoutchouc or plastics of the inner placement of common elbow.
The special elbow of the utility model design is realized the erosion resistance effect.This special elbow can be formed by the cast steel casting, also can be formed by plastics or castable rubber.
Description of drawings
Fig. 1 is the structural representation of erosion resistance elbow of the present utility model.
The specific embodiment
Below with reference to accompanying drawing and embodiment, structure of the present utility model and operating principle are further described.
As shown in Figure 1, the straight diversion section of 1 inlet, 2 spiral stream guidance bending sections, the 3. straight diversion section of outlet.Can be chosen to be 4 to 8 according to the upward velocity and the drilling cuttings size of gas drilling design with the quantity of the flow deflector 4 of the disposable casting of body, flow deflector 4 thickness then according to the elbow diameter size at 4mm between the 15mm.The helical angle of spiral section does not then coexist according to employed material and changes between 40 ° ~ 70 ° degree.
During gas drilling; carrying " Gu gas-" two phase flow of drilling cuttings or " Gu gas--liquid " (on a small quantity) three-phase stream and do not changing the original flow direction at straight length and the straight diversion section that enters the erosion resistance elbow; after entering spiral stream guidance bending section 2; air-flow can change original flow direction under 4 guiding of helical form flow deflector; becoming rectilinear motion rotatablely moves into helical form; under action of inertia; the part particle is understood intensive bump or is dashed and cut on the flow deflector 4; grind the bend pipe outer wall and can or seldom can directly not dash; even there is individual particles to strike the bend pipe outer wall; also can be because of the effect of spiral flow deflector 4; particle speed is reduced greatly; thereby play protection bend pipe outer wall, the effect that increases the service life.
Erosion resistance elbow structure of the present utility model is simple, and on-the-spot easy to use, the erosion-wear-resisting effect is remarkable, can satisfy the technical requirements of gas drilling.
Claims (4)
1, gas drilling erosion resistance elbow, comprise inlet straight diversion section (1), spiral stream guidance bending section (2), export straight diversion section (3), it is characterized in that: the straight diversion section (1) that enters the mouth, spiral stream guidance bending section (2), export and establish flow deflector (4) in the straight diversion section (3), the straight diversion section (1) that enters the mouth, spiral stream guidance bending section (2), export between the straight diversion section (3) and connect by flow deflector (4).
2, gas drilling erosion resistance elbow according to claim 1 is characterized in that: flow deflector (4) is a groove structure.
3, gas drilling erosion resistance elbow according to claim 1 is characterized in that: flow deflector (4) is 4 to 8, the thickness of flow deflector 4 at 4mm between the 15mm.
4, gas drilling erosion resistance elbow according to claim 1, it is characterized in that: the helical angle of spiral stream guidance bending section (2) is between 40 ° to 70 ° degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520108544 CN2799834Y (en) | 2005-06-03 | 2005-06-03 | Erosion resistance elbow for gas drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520108544 CN2799834Y (en) | 2005-06-03 | 2005-06-03 | Erosion resistance elbow for gas drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2799834Y true CN2799834Y (en) | 2006-07-26 |
Family
ID=36842332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520108544 Expired - Lifetime CN2799834Y (en) | 2005-06-03 | 2005-06-03 | Erosion resistance elbow for gas drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2799834Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398255A (en) * | 2013-08-08 | 2013-11-20 | 镇江荣诚管业有限公司 | Elbow |
| CN104929532A (en) * | 2015-06-26 | 2015-09-23 | 中国石油集团西部钻探工程有限公司 | Erosion-resistant gas drilling bend |
| CN109577890A (en) * | 2019-01-24 | 2019-04-05 | 中石化四机石油机械有限公司 | A kind of pipeline static mixer and mixed method |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
-
2005
- 2005-06-03 CN CN 200520108544 patent/CN2799834Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398255A (en) * | 2013-08-08 | 2013-11-20 | 镇江荣诚管业有限公司 | Elbow |
| CN104929532A (en) * | 2015-06-26 | 2015-09-23 | 中国石油集团西部钻探工程有限公司 | Erosion-resistant gas drilling bend |
| CN109577890A (en) * | 2019-01-24 | 2019-04-05 | 中石化四机石油机械有限公司 | A kind of pipeline static mixer and mixed method |
| CN111102417A (en) * | 2019-12-12 | 2020-05-05 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
| CN111102417B (en) * | 2019-12-12 | 2021-05-11 | 中国石油大学(华东) | Bent pipe with inner spiral fins on near-wall surface |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150603 Granted publication date: 20060726 |