CN103321594B - The drilling well anti-mud drum centralizer of closed screw wing - Google Patents
The drilling well anti-mud drum centralizer of closed screw wing Download PDFInfo
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- CN103321594B CN103321594B CN201310259520.XA CN201310259520A CN103321594B CN 103321594 B CN103321594 B CN 103321594B CN 201310259520 A CN201310259520 A CN 201310259520A CN 103321594 B CN103321594 B CN 103321594B
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- centralizer
- wing
- mud drum
- closed
- drilling well
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Abstract
The invention discloses the anti-mud drum centralizer of the closed screw wing of a kind of drilling well.The drilling well anti-mud drum centralizer of closed screw wing, comprise centralizer body (21) in a tubular form, the outer wall in described centralizer body (21) stage casing is provided with at least one spiral righting wing (32), described centralizer body (21) stage casing is provided with coaxial closed cylinder (31), the external diameter of described closed cylinder (31) is less than the external diameter of the spiral righting wing (32), described closed cylinder (31) and centralizer body (21) form annular space, close the clod discharge launder (33) cylinder (31) outer wall being provided with and being communicated with annular space.The present invention is owing to being provided with the structure of closed cylinder and clod discharge launder, when the clod that the righting wing scrapes the borehole wall gathers to a certain extent, the annular space of closed cylinder and centralizer body can be entered by clod discharge launder, then taken away by the high-velocity fluid by annular space, thus prevent centralizer mud drum.
Description
Technical field
The invention belongs to the technical field of oilfield drilling, specifically refer to the anti-mud drum centralizer of the closed screw wing of a kind of drilling well.
Background technology
At present, in prior art, centralizer conventional in drilling process has straight wing centralizer and spiral righting wing centralizer, and conventional centralizer lacks the design of anti-mud drum.Boring the sticky mud stone of the large section of chance or making a trip through undergauge mud stone section, the complex situations of centralizer mud drum often can be there are.If centralizer generation mud drum in drilling process, annular fiowpath can diminish, and when creeping into new stratum, serious backing pressure problem may occur, and causes ground the pressure of the drill distortion, and down-hole annular is sprained pressure, very easily occur drilling speed slowly, the Lou stratum down-hole problem that even bit freezing etc. is serious of spraining.If there is centralizer generation mud drum in round trip, annular fiowpath can diminish or block, and can bring abnormal high excitement or swabbing pressure, easily cause the accidents such as leakage, overflow or blowout.If centralizer generation mud drum in reaming or back reaming round trip, annular fiowpath can diminish or block, and Lou stratum, the abnormal high pump pressure restriction discharge capacity of easily spraining causes and take rock difficulty well totally so that cause bit freezing.
Above-mentioned discussion content object be to reader introduce may to below by the various aspects of technology relevant for the various aspects of the present invention be described and/or advocate, believe that this discussion content contributes to for reader with background's information, to be conducive to understanding various aspects of the present invention better, therefore, should be appreciated that it is discuss to read these with this angle, instead of admit prior art.
Summary of the invention
The object of the invention is to avoid deficiency of the prior art and provide the closed screw wing of a kind of drilling well anti-mud drum centralizer, to solve centralizer mud drum problem.
Object of the present invention is achieved through the following technical solutions:
There is provided the closed screw wing of a kind of drilling well anti-mud drum centralizer, comprise centralizer body in a tubular form, the outer wall in described centralizer body stage casing is provided with at least one spiral righting wing, described centralizer body stage casing is provided with coaxial closed cylinder, the external diameter of described closed cylinder is less than the external diameter of the spiral righting wing, described closed cylinder and centralizer body form annular space, close clod discharge launder drum outer wall being provided with and being communicated with annular space.
Wherein, the described spiral righting wing is three, is circumferentially distributed on the outer wall of centralizer body uniform intervals.
Wherein, described clod discharge launder is three, is distributed on the closed cylinder between two adjacent spiral righting wings.
Wherein, described clod discharge launder is in spiral distribution, and pitch is identical with the pitch of the spiral righting wing.
The drilling well provided by the invention anti-mud drum centralizer of closed screw wing, comprise centralizer body in a tubular form, the outer wall in described centralizer body stage casing is provided with at least one spiral righting wing, described centralizer body stage casing is provided with coaxial closed cylinder, the external diameter of described closed cylinder is less than the external diameter of the spiral righting wing, described closed cylinder and centralizer body form annular space, close clod discharge launder drum outer wall being provided with and being communicated with annular space.Owing to being provided with the structure of closed cylinder and clod discharge launder, when the clod that the righting wing scrapes the borehole wall gathers to a certain extent, the annular space of closed cylinder and centralizer body can be entered by clod discharge launder, then taken away by the high-velocity fluid by annular space, thus prevent centralizer mud drum.
Owing to have employed above-mentioned structure, the present invention has following beneficial effect:
1) structure is simple, and cost of investment is low, reduces the down-hole accident brought by centralizer mud drum;
2) increase clod draining structure, be conducive to preventing centralizer mud drum;
3) change fluidised form, increase clod cleaning performance, be conducive to preventing centralizer mud drum;
4) easy to operate, can extensive use in oilfield drilling operation.
Accompanying drawing explanation
The invention will be further described to utilize accompanying drawing, but the embodiment in accompanying drawing does not form any limitation of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, can also obtain other accompanying drawing according to the following drawings.
Fig. 1 is the stereogram of the anti-mud drum centralizer of the closed screw wing of drilling well.
Detailed description of the invention
Technical scheme of the present invention is understood better in order to make those skilled in the art, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Core of the present invention is to provide the closed screw wing of a kind of drilling well anti-mud drum centralizer, to solve centralizer mud drum problem.
As shown in Figure 1, the drilling well of the present invention anti-mud drum centralizer of closed screw wing, comprise centralizer body 21 in a tubular form, the upper end of centralizer body 21 is screw thread box 11, the lower end of centralizer body 21 is screw thread pin thread 12, and screw thread box 11, screw thread pin thread 12 are for being connected with other parts of drilling tool.The outer wall in described centralizer body 21 stage casing is provided with at least one spiral righting wing 32, in embodiment, the described spiral righting wing 32 is three, is circumferentially distributed on the outer wall of centralizer body 21 uniform intervals.Certainly, the number of the spiral righting wing 32 also can be the quantity such as two, four.The spiral righting wing 32 is fixing by mode and the centralizer body 21 of welding.Described centralizer body 21 stage casing is provided with coaxial closed cylinder 31, and the external diameter of described closed cylinder 31 is less than the external diameter of the spiral righting wing 32, and a part for the spiral righting wing 32 protrudes from closed cylinder 31.Described closed cylinder 31 forms annular space with centralizer body 21, and annular space can pass through for fluid.Described closed cylinder 31 outer wall is provided with the clod discharge launder 33 being communicated with annular space, the number of clod discharge launder 33 can be one or more, in embodiment, described clod discharge launder 33 is three, be distributed on the closed cylinder 31 between two adjacent spiral righting wings 32, described clod discharge launder 33 is in spiral distribution, and pitch is identical with the pitch of the spiral righting wing 32.Owing to being provided with the structure of closed cylinder and clod discharge launder, when the clod that the righting wing scrapes the borehole wall gathers to a certain extent, the annular space of closed cylinder and centralizer body can be entered by clod discharge launder, then taken away by the high-velocity fluid by annular space, thus prevent centralizer mud drum.
When using of the present invention, concrete operations are as follows:
1., before entering well, visual inspection instrument, requires that outward appearance uses the open defects such as crack without impact; Instrument cleans, without dirts such as clods; Measure into well tool external diameter;
2. with moment of torsion on tong, on recommend API torque wrench moment to box and pin thread;
3. be connected in drilling tool pipe string and enter well, underground work;
4. after pulling out of hole, use tong shackle, dress watch instrument, measure external diameter;
5. instrument is regularly detected a flaw and other detection, guarantees into well in good condition.
Preferably, set forth a lot of detail in description above so that fully understand the present invention, but the present invention can also adopt other to be different from other modes described here and implement, and therefore, can not be interpreted as limiting the scope of the invention.
In a word; those skilled in the art although the present invention illustrates above-mentioned preferred embodiment, should illustrate, although can carry out various change and remodeling; unless such change and remodeling deviate from scope of the present invention, otherwise all should be included in protection scope of the present invention.
Claims (4)
1. the drilling well anti-mud drum centralizer of closed screw wing, comprise centralizer body (21) in a tubular form, the outer wall in described centralizer body (21) stage casing is provided with at least one spiral righting wing (32), it is characterized in that: described centralizer body (21) stage casing is provided with coaxial closed cylinder (31), the external diameter of described closed cylinder (31) is less than the external diameter of the spiral righting wing (32), described closed cylinder (31) and centralizer body (21) form annular space, close the clod discharge launder (33) cylinder (31) outer wall being provided with and being communicated with annular space.
2. the drilling well according to claim 1 anti-mud drum centralizer of closed screw wing, is characterized in that: the described spiral righting wing (32) is three, is circumferentially distributed on the outer wall of centralizer body (21) uniform intervals.
3. the drilling well according to claim 2 anti-mud drum centralizer of closed screw wing, is characterized in that: described clod discharge launder (33) is three, is distributed on the closed cylinder (31) between two adjacent spiral righting wings (32).
4. the drilling well according to claim 3 anti-mud drum centralizer of closed screw wing, is characterized in that: described clod discharge launder (33) is in spiral distribution, and pitch is identical with the pitch of the spiral righting wing (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259520.XA CN103321594B (en) | 2013-06-27 | 2013-06-27 | The drilling well anti-mud drum centralizer of closed screw wing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310259520.XA CN103321594B (en) | 2013-06-27 | 2013-06-27 | The drilling well anti-mud drum centralizer of closed screw wing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103321594A CN103321594A (en) | 2013-09-25 |
| CN103321594B true CN103321594B (en) | 2015-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310259520.XA Expired - Fee Related CN103321594B (en) | 2013-06-27 | 2013-06-27 | The drilling well anti-mud drum centralizer of closed screw wing |
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| CN (1) | CN103321594B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100557A (en) * | 2017-06-15 | 2017-08-29 | 贵州省地质矿产勘查开发局111地质大队 | Spiral wing centralizer for air down-the-hole hammer |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074808U (en) * | 1990-08-15 | 1991-04-10 | 大庆石油管理局钻井一公司 | Sprial wing widnow type drilling tool corrector |
| US5803193A (en) * | 1995-10-12 | 1998-09-08 | Western Well Tool, Inc. | Drill pipe/casing protector assembly |
| CN2756813Y (en) * | 2004-10-28 | 2006-02-08 | 大庆君瑞达采油技术开发有限公司 | Anti-wear pumping aid efficient centralizer centering ring |
| CN201241633Y (en) * | 2008-07-31 | 2009-05-20 | 大港油田集团有限责任公司 | Rotary centralizer |
| CN201560722U (en) * | 2009-11-23 | 2010-08-25 | 刘中青 | Anti-bias wear oil pumping rod centralizer |
| CN203374217U (en) * | 2013-06-27 | 2014-01-01 | 中国海洋石油总公司 | Closed type spiral swing balling prevention centering device for well drilling |
-
2013
- 2013-06-27 CN CN201310259520.XA patent/CN103321594B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074808U (en) * | 1990-08-15 | 1991-04-10 | 大庆石油管理局钻井一公司 | Sprial wing widnow type drilling tool corrector |
| US5803193A (en) * | 1995-10-12 | 1998-09-08 | Western Well Tool, Inc. | Drill pipe/casing protector assembly |
| CN2756813Y (en) * | 2004-10-28 | 2006-02-08 | 大庆君瑞达采油技术开发有限公司 | Anti-wear pumping aid efficient centralizer centering ring |
| CN201241633Y (en) * | 2008-07-31 | 2009-05-20 | 大港油田集团有限责任公司 | Rotary centralizer |
| CN201560722U (en) * | 2009-11-23 | 2010-08-25 | 刘中青 | Anti-bias wear oil pumping rod centralizer |
| CN203374217U (en) * | 2013-06-27 | 2014-01-01 | 中国海洋石油总公司 | Closed type spiral swing balling prevention centering device for well drilling |
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| Publication number | Publication date |
|---|---|
| CN103321594A (en) | 2013-09-25 |
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| 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 | ||
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Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Co-patentee after: CNOOC (China) Limited Zhanjiang Branch Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 China oil tower, 25 Chaoyangmen North Street, Dongcheng District, Beijing Co-patentee before: CNOOC (China) Limited Zhanjiang Branch Patentee before: China National Offshore Oil Corporation |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151104 Termination date: 20200627 |