CN204126559U - Spiral automatic mud scraper - Google Patents
Spiral automatic mud scraper Download PDFInfo
- Publication number
- CN204126559U CN204126559U CN201420437432.4U CN201420437432U CN204126559U CN 204126559 U CN204126559 U CN 204126559U CN 201420437432 U CN201420437432 U CN 201420437432U CN 204126559 U CN204126559 U CN 204126559U
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- CN
- China
- Prior art keywords
- scraper
- conduit
- diameter
- locking ring
- cavity
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of spiral automatic mud scraper, it is arranged between the horn mouth of conduit and drilling floor surface, and the external diameter of this scraper upper end is identical with the bell-mouthed maximum outside diameter of conduit, and the external diameter of lower end is slightly less than catheter diameter; Between scraper top and bottom, be provided with the multi-stage annular step that more downward diameter is less, scraper be may be seated on the horn mouth of conduit.The outer peripheral face of scraper and the outer wall of described conduit are evenly equipped with multiple locking ring respectively, and on each locking ring on scraper and conduit, the formation one group of corresponding locking ring, is connected by chain cable therebetween; The middle part of described scraper forms cavity, and the internal diameter of this cavity is slightly less than the external diameter of described drill string, and cavity is formed with multiple spiral type groove, the gradient of described multiple spiral type groove make scraper inwall in the vertical direction be projected as a closed circle.This scraper effectively can strike off the drilling fluid on drill string, reduces labor strength, increases drilling safety.
Description
Technical field
The utility model relates to oil or geological drilling field, particularly relates to a kind of automatic mud scraper removing drill string outer wall adhesion mud for situ of drilling well.
Background technology
On-the-spot at the wellbore construction such as oil, natural gas, scientific investigation or geological drilling, in normal trip-out process, due to the viscosity of drilling fluid self, and be subject to the effect of inertia that drilling tool proposes in well, drilling fluid sticked on drilling tool and is carried out well head.If the drilling fluid be attached on drilling tool is not disposed, the waste of drilling fluid will be caused on the one hand, simultaneously because drilling fluid has alkaline speciality, certain corrosion is caused by the device such as drilling rod and bank head machinery, in addition drilling fluid drilling tool adhered to also can affect drilling tool upper/shackle operation, therefore the drilling fluid removed on drilling tool outer wall is extremely necessary.
Because the diameter of two ends of drill joint is larger than drilling rod body diameter, certain difficulty is brought to automatic sludge removing, to be driller mostly strike off mud on drilling tool with homemade mud rope of scraping to current situ of drilling well, not only increase the labour intensity of workman, and affecting operating personnel, to observe periphery operation dynamic, is unfavorable for avoiding the accidents such as falling object from high altitude.
Summary of the invention
For overcoming above-mentioned defect, the invention provides one and being suspended on conduction pipe horn mouth, the little and spiral automatic mud scraper that safety is high of labour intensity.
The technical solution adopted for the present invention to solve the technical problems is as follows:
A kind of spiral automatic mud scraper, it is arranged between the horn mouth of conduit and drilling floor surface, and the external diameter of this scraper upper end is identical with the bell-mouthed maximum outside diameter of conduit, and the external diameter of lower end is slightly less than catheter diameter; Between scraper top and bottom, be provided with the multi-stage annular step that more downward diameter is less, scraper be may be seated on the horn mouth of conduit.The outer peripheral face of scraper and the outer wall of described conduit are evenly equipped with multiple locking ring respectively, and on each locking ring on scraper and conduit, the formation one group of corresponding locking ring, is connected by chain cable therebetween; The middle part of described scraper forms cavity, and the internal diameter of this cavity is slightly less than the external diameter of described drill string, and cavity is formed with multiple spiral type groove, the gradient of described multiple spiral type groove make scraper inwall in the vertical direction be projected as a closed circle.
This scraper is made up of elastomeric material, and the design of groove can reduce the consumption of rubber elastomeric material, and ensure that scraper inwall is appointed in upright projection direction is so a closed circle simultaneously, does not affect and scrapes mud effect.
Preferably, the conical surface gradually opened downwards is formed at the bottom of described cavity, to facilitate drilling rod and joint thereof smoothly by scraper, and the mud struck off is flowed among pit shaft from this conical surface.
Preferably, the upper surface of described scraper is the cambered surface of an indent, and after making trip-out shackle, the drilling fluid gushed out in drilling rod falls in scraper upper surface, and flows to pit shaft by spiral groove.
Preferably, the length of described chain cable slightly larger than the minimum range between its two locking rings connected, thus ensures that scraper has certain scope of activities in operation process, can the swing of self adaptation drilling tool or phenomenon placed in the middle.Meanwhile, chain cable is used for preventing scraper to be suggested drilling floor surface together along with drill string.
The group number of locking ring is just no less than two groups, scraping mud job stabilization and reducing installation workload, advising employing three groups or four groups for meeting.
When adopting the mud-scraping apparatus of said structure, drill string upwards proposes catheter procedure in well, and scraper epimere inwall is attached on drill string outer wall all the time, thus the drilling fluid on drill string is struck off, effectively prevent drilling fluid from being taken out of, reduce labor strength, add drilling safety.
Accompanying drawing explanation
Fig. 1 is the perspective view of spiral automatic mud scraper of the present utility model;
Fig. 2 is the cross-sectional view of automatic mud scraper in Fig. 1;
Fig. 3 be in Fig. 1 automatic mud scraper at the mounting structure schematic diagram of well head;
Fig. 4 is cross-sectional view when automatic mud scraper is arranged on well head place in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing, concrete structure of the present utility model is described in detail.
This spiral automatic mud scraper is arranged between the horn mouth of conduit and drilling floor surface (not shown).See Fig. 1 ~ Fig. 4, the external diameter of this scraper 10 upper end is identical with the maximum outside diameter of the horn mouth 21 of conduit 20, and the external diameter of lower end is slightly less than the internal diameter of conduit 20; Between scraper 10 top and bottom, be provided with the multi-stage annular step 13 that more downward diameter is less, scraper be may be seated on the horn mouth 21 of conduit.The outer peripheral face of scraper and the outer wall of conduit 20 are evenly equipped with multiple locking ring 12 respectively, and on each locking ring on scraper 10 and conduit 20, corresponding locking ring forms one group, is connected therebetween by chain cable (not shown).
Scraper 10 is made up of elastomeric material, form cavity in the middle, the internal diameter of this cavity is slightly less than the external diameter of drill string 22, cavity is formed multiple spiral type groove 11, the gradient of described multiple spiral type groove 11 make scraper inwall in the vertical direction be projected as a closed circle, do not affect and scrape mud effect.
The conical surface 14 gradually opened downwards is formed at the bottom of described cavity, to facilitate drilling rod and joint thereof smoothly by scraper, and the mud struck off is flowed among pit shaft from this conical surface.The upper surface of scraper 10 is the cambered surface 15 of an indent, and after making trip-out shackle, the drilling fluid gushed out in drilling rod falls in scraper upper surface, and flows to pit shaft by spiral groove 11.
The length of described chain cable slightly larger than the minimum range between its two locking rings connected, thus ensures that scraper has certain scope of activities in operation process, can the swing of self adaptation drilling tool or phenomenon placed in the middle.Meanwhile, chain cable is used for preventing scraper to be suggested drilling floor surface together along with drill string.
Scrape mud job stabilization for meeting and reduce installation workload, the group number of locking ring is just no less than two groups, advises employing three groups or four groups.
The use procedure of above-mentioned automatic mud scraper is as follows:
When offshore boring island preparing pull out of hole, drilling rod is fixed on rotating disk by slips, scraper is enclosed within drilling-rod external wall from drilling rod upper end, in initial trip-out process, the scraper of fastening chain cable is depressed under drilling floor surface by rod tool by driller, scraper lower end is injected among conduit and entirety is seated on conduit horn mouth, be connected and fixed with the locking ring of chain cable by scraper and conduit.
With chain cable by after relative with conduit for scraper being connected and fixed, trip out drilling tool according to normal trip-out mode, now scraper inwall is close to drill string outer wall all the time.Drill string is carried in process, scraper follows drill string to have upwards movement tendency together, but after chain cable limits its maximum height, scraper geo-stationary, and while making drill string pass scraper, the drilling fluid sticking to drill string surface is eliminated and among inflow catheter.In trip-out process, when drilling fluid is gushed out from drilling rod, drilling fluid is flow on scraper upper surface by rotating disk well head, and then flows in helical groove, finally enters pit shaft.When trip-out will complete, remove the connection between chain cable and conduit by driller, make scraper entirety can propose drilling floor surface along with drill string one piece, then taken off.
Claims (5)
1. a spiral automatic mud scraper, it is arranged between the horn mouth of conduit and drilling floor surface, for striking off the mud on drill string outer wall, it is characterized in that: the external diameter of this scraper upper end is identical with the bell-mouthed maximum outside diameter of conduit, and the external diameter of lower end is slightly less than catheter diameter; The multi-stage annular step that more downward diameter is less is provided with between scraper top and bottom; The outer peripheral face of scraper and the outer wall of described conduit are evenly equipped with multiple locking ring respectively, each locking ring on scraper and conduit are connected by chain cable between locking ring accordingly; The middle part of described scraper forms cavity, and the internal diameter of this cavity is slightly less than the external diameter of described drill string, and cavity is formed with multiple spiral type groove, the gradient of described multiple spiral type groove make scraper inwall in the vertical direction be projected as a closed circle.
2. spiral automatic mud scraper according to claim 1, is characterized in that: the conical surface gradually opened downwards is formed at the bottom of described cavity.
3. spiral automatic mud scraper according to claim 1 and 2, is characterized in that: the upper surface of described scraper is the cambered surface of an indent.
4. spiral automatic mud scraper according to claim 1 and 2, is characterized in that: the number of described scraper and supravasal locking ring is all no less than 2.
5. the spiral automatic mud scraper according to claims 1 or 2, is characterized in that: the length of described chain cable is slightly larger than the minimum range between its two locking rings connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437432.4U CN204126559U (en) | 2014-08-04 | 2014-08-04 | Spiral automatic mud scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420437432.4U CN204126559U (en) | 2014-08-04 | 2014-08-04 | Spiral automatic mud scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204126559U true CN204126559U (en) | 2015-01-28 |
Family
ID=52382926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420437432.4U Expired - Fee Related CN204126559U (en) | 2014-08-04 | 2014-08-04 | Spiral automatic mud scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204126559U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035867A (en) * | 2016-02-03 | 2017-08-11 | 罗伯特·博世有限公司 | Removing device with banks of memory |
-
2014
- 2014-08-04 CN CN201420437432.4U patent/CN204126559U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107035867A (en) * | 2016-02-03 | 2017-08-11 | 罗伯特·博世有限公司 | Removing device with banks of memory |
| CN107035867B (en) * | 2016-02-03 | 2020-04-14 | 罗伯特·博世有限公司 | Scraper device with storage body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20170804 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |