CN205036316U - Rotatory efflux screw rod centralizer - Google Patents
Rotatory efflux screw rod centralizer Download PDFInfo
- Publication number
- CN205036316U CN205036316U CN201520805246.6U CN201520805246U CN205036316U CN 205036316 U CN205036316 U CN 205036316U CN 201520805246 U CN201520805246 U CN 201520805246U CN 205036316 U CN205036316 U CN 205036316U
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- China
- Prior art keywords
- jet nozzle
- pass prot
- cylindrical body
- screw rod
- impeller
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Abstract
The utility model belongs to the technical field of oil and natural gas probing type well drilling downhole tool, the utility model relates to a neotype rotatory efflux screw rod centralizer, the upper end of column body is provided with the screw rod, the lower extreme is the female connection structure, the centre of column body is equipped with axially extended medium clearing hole, evenly be equipped with the same sand grip of rightting of three structure on the outer peripheral face of column body, it establishes on the column body to right the heliciform dish of sand grip, every is right and has all seted up the by pass port on the sand grip, seal installation has rotatory jet nozzle in the by pass port, the outer peripheral face upper seal cover of rotatory jet nozzle is equipped with ring type seal, ring type seal's outer peripheral face and the sealed cooperation of the pore wall of by pass port, rotatory jet nozzle seals through ring type seal and jump ring and installs in the by pass port, the ring type seal cover is established on the inner segment of rotatory jet nozzle, and the jump ring is established in the outer section of rotatory jet nozzle, its simple structure, convenient to use, the machining precision requires lowly, and the cost is few.
Description
Technical field:
The utility model belongs to oil-gas drilling class drilling well downhole tool technical field, relates to a kind of novel rotating jet screw rod centralizer.
Background technology:
Along with the needs of oil-gas exploration and development, deep-well, Holes of Complicated Wells, special well quantity rise year by year, the circulation problems occurred in drilling process is a very thorny difficult problem always, process leakage wastes a large amount of manpowers, financial resources and time, serious leakage can cause cave-in, bit freezing and gas blowout accident, What is more can cause well to be scrapped, and causes huge economic loss.All there is circulation problems in various degree in each oil field of China, the particularly hole of western oil gas field deep-well, hole and Fractured circulation problems more outstanding, as Tarim Basin, the piedmont tectonic belts in accurate Ge Er basin, the knob of TulufanHami oil field, the Xifeng area of Changqing oilfields and the eastern Sichuan Basin etc. in Sichuan, Xinjiang Top Tai Area Permian System leakage probability is more than 70%, in drilling well, occur in well cementation that the probability of missing is higher, have a strong impact on downhole safety operation, and existing pressurization sealing technology length consuming time, easily occur that subsequent job is missed again, seriously constrain the paces that effect is put forward in exploration and development.
At present, usually chemical plugging method is adopted, as bridge blinding technology and gel blocking technology, but the bearing capacity of these two kinds of technology is poor, sealing agent cannot organically blend with the borehole wall, does not reach all-pervasive plugging action, lack the active force going deep into the borehole wall, do not solve the root problem of leakage, ZL200720148879.X discloses a kind of On Physical Plugging While Drilling downhole tool, comprise body of tool, side nozzle, center isocon, body of tool has isocon, the two ends of isocon are provided with side nozzle, when after drilling fluid fluid entering tool body, by 1 ~ 4 tap hole by the flow shunt of about 18% to two side nozzles, utilize the flow shunt small part that this instrument will pump into, with the mode of hydraulic jet direct directive leakage stratum, coordinate suitable drilling fluid system, " the artificial borehole wall " is formed at the lost-circulation zone borehole wall, sealing agent and the borehole wall organically blend, bore after effectively solving the quiet stifled or cement paste shutoff of chemistry and open and a difficult problem of leaking.But this instrument need coordinate two public short circuit to be connected with screw rod, and drilling assembly is complicated, affects the application life of screw rod after connecting, and the compactness strengthen of mud cake needs to improve further.
Summary of the invention:
Goal of the invention of the present utility model is the shortcoming overcoming prior art existence, seeks design and provides a kind of rotating jet screw rod centralizer, solves leak-proof leak-stopping downhole tool of the prior art and is connected inconvenience with screw rod, reduces the problem in screw rod application life.
To achieve these goals, agent structure of the present utility model comprises cylindrical body, medium passing hole, righting raised line, by-pass prot, jet nozzle, O-ring seal, jump ring and screw rod; The upper end of cylindrical body is provided with screw rod, and lower end is female connection structure, and cylindrical body is connected with external drill bit by female connection structure; The centre of cylindrical body is provided with axially extended medium passing hole, and the medium from screw rod passes through by medium passing hole; The outer peripheral face of cylindrical body is evenly provided with the righting raised line that three structures are identical, the helical form dish of righting raised line is located in cylindrical body, the bearing of trend of righting raised line is crossing with the bus of cylindrical body, and the bearing of trend of righting raised line at each some place and cylindrical body cross this point bus between angle the same, each righting raised line all offers by-pass prot, and medium passing hole is in communication with the outside by by-pass prot; Jet nozzle is sealed and installed with in by-pass prot, the outer peripheral face upper sleeve gasket of jet nozzle is provided with O-ring seal, the outer peripheral face of O-ring seal and the hole wall of by-pass prot are sealed and matched, and jet nozzle is installed in by-pass prot by O-ring seal and jump ring; O-ring seal is set on the inner segment of jet nozzle, and jump ring is located in the outer section of jet nozzle.
By-pass prot described in the utility model is the shoulder hole near cylindrical body center, and the diameter of inner side by-pass prot is less than the diameter of outside by-pass prot, and the quantity of by-pass prot at least has two according to actual needs.
Jet nozzle described in the utility model is made up of impeller and housing, and impeller is placed in the cavity body of housing, and impeller is three rectangular coil shape structures, and the screw wing direction of rotation of impeller is dextrorotation, and the two ends of impeller are cone structure, plays guide functions; Housing is hollow pipe column structure, and the outlet of housing is tapered, and its exit inside diameter is less than the screw wing external diameter of impeller, prevents impeller from coming off, and the housing of jet nozzle is installed in the by-pass prot of outside by jump ring, and the outer tube wall of housing is provided with O-ring seal; The screw wing external diameter of impeller is greater than the diameter of inner side by-pass prot, is convenient to impeller to be installed in the cavity of housing.
The inner edge of jump ring described in the utility model is fastened in annular groove that the outer peripheral face of jet nozzle is offered, and the outer rim of jump ring is fastened in annular groove that by-pass prot hole wall is offered.
The utility model in use, the upper end of cylindrical body and screw rod are connected as one, lower end is directly connected with drill bit by female connection structure, after drilling fluid enters cylindrical body, the drilling fluid of partial discharge is diverted to jet nozzle through the by-pass prot of cylindrical body, formed in jet nozzle exit and rotate hydraulic jet, utilize the rotation waterpower jet energy formed to the surge effect of the borehole wall, be mixed in drilling fluid with boring leak-proof leak-stopping material powerful gap and the crack pushing miss rock of borehole to targetedly, formed fine and close at the borehole wall, there are mud cake and the shading ring of bearing capacity, effective shut-off capacity improving the leakage borehole wall, thus increase the bearing capacity of the borehole wall and the security window of drilling fluid density, meet bearing requirements during well cementing operation, stratum is avoided to miss.
The utility model compared with prior art, its structure is simple, and easy to use, requirement on machining accuracy is low, cost is few, solve the problem of the easy erosion of tap hole under huge discharge condition, and little to the change of screw rod, reduce the risk affecting screw rod application life, the jet nozzle adopted can realize 360 ° and cover comprehensively, when being greater than fast drilling in diameter 311.1mm size well, eliminating the injection blind area easily produced, improving plugging while drilling effect; The impeller of jet nozzle inside makes the rotating jet VELOCITY DISTRIBUTION of formation relatively uniform, be conducive to the formation of wellbore stability and mud cake, reduce the risk of the instrument erosion borehole wall, sealing installing jet nozzle in by-pass prot, what also can realize microcrack stratum while using screw rod speed-raising assists leak stopping with brill, has widened the scope of application of screw rod.
Accompanying drawing illustrates:
Fig. 1 is agent structure principle schematic of the present utility model.
Fig. 2 is the structural principle schematic diagram of the utility model B-B section.
Detailed description of the invention:
Below by embodiment, also the invention will be further described by reference to the accompanying drawings.
Embodiment:
The agent structure of the present embodiment comprises cylindrical body 1, medium passing hole 2, righting raised line 3, by-pass prot 4, jet nozzle 5, O-ring seal 6, jump ring 7 and screw rod 8; The upper end of cylindrical body 1 is provided with screw rod 8, and lower end is female connection structure, and cylindrical body 1 is connected with external drill bit by female connection structure; The centre of cylindrical body 1 is provided with axially extended medium passing hole 2, and the medium from screw rod 8 passes through by medium passing hole 2; The outer peripheral face of cylindrical body 1 is evenly provided with the righting raised line 3 that three structures are identical, the helical form dish of righting raised line 3 is located in cylindrical body 1, the bearing of trend of righting raised line 3 is crossing with the bus of cylindrical body 1, and the bearing of trend of righting raised line 3 at each some place is the same with the angle that cylindrical body 1 is crossed between the bus of this point, each righting raised line 3 all offers by-pass prot 4, and medium passing hole 2 is in communication with the outside by by-pass prot 4; Jet nozzle 5 is sealed and installed with in by-pass prot 4, the outer peripheral face upper sleeve gasket of jet nozzle 5 is provided with O-ring seal 6, the outer peripheral face of O-ring seal 6 and the hole wall of by-pass prot 4 are sealed and matched, and jet nozzle 5 is installed in by-pass prot 4 by O-ring seal 6 and jump ring 7; O-ring seal 6 is set on the inner segment of jet nozzle 5, and jump ring 7 is located in the outer section of jet nozzle 5.
By-pass prot 4 described in the present embodiment is the shoulder hole near cylindrical body 1 center, and the diameter of inner side by-pass prot 4 is less than the diameter of outside by-pass prot 4, and the quantity of by-pass prot at least has two according to actual needs.
Described in the present embodiment, jet nozzle 5 is made up of impeller and housing, and impeller is placed in the cavity body of housing, and impeller is three rectangular coil shape structures, and the screw wing direction of rotation of impeller is dextrorotation, and the two ends of impeller are cone structure, plays guide functions; Housing is hollow pipe column structure, the outlet of housing is tapered, and its exit inside diameter is less than the screw wing external diameter of impeller, prevents impeller from coming off, the housing of jet nozzle 5 is installed in the by-pass prot 4 of outside by jump ring 7, the outer tube wall of housing is provided with O-ring seal 6; The screw wing external diameter of impeller is greater than the diameter of inner side by-pass prot 4, is convenient to impeller to be installed in the cavity of housing.
The inner edge of jump ring 7 described in the present embodiment is fastened in annular groove that the outer peripheral face of jet nozzle 5 is offered, and the outer rim of jump ring 7 is fastened in annular groove that by-pass prot 4 hole wall is offered.
The present embodiment in use, the upper end of cylindrical body 1 and screw rod 8 are connected as one, lower end is directly connected with drill bit by female connection structure, after drilling fluid enters cylindrical body 1, the drilling fluid of partial discharge is diverted to jet nozzle 5 through the by-pass prot 4 of cylindrical body 1, formed in jet nozzle 5 exit and rotate hydraulic jet, utilize the rotation waterpower jet energy formed to the surge effect of the borehole wall, be mixed in drilling fluid with boring leak-proof leak-stopping material powerful gap and the crack pushing miss rock of borehole to targetedly, formed fine and close at the borehole wall, there are mud cake and the shading ring of bearing capacity, effective shut-off capacity improving the leakage borehole wall, thus increase the bearing capacity of the borehole wall and the security window of drilling fluid density, meet bearing requirements during well cementing operation, stratum is avoided to miss.
Claims (4)
1. a rotating jet screw rod centralizer, is characterized in that agent structure comprises cylindrical body, medium passing hole, righting raised line, by-pass prot, jet nozzle, O-ring seal, jump ring and screw rod, the upper end of cylindrical body is provided with screw rod, and lower end is female connection structure, and cylindrical body is connected with external drill bit by female connection structure, the centre of cylindrical body is provided with axially extended medium passing hole, the outer peripheral face of cylindrical body is evenly provided with the righting raised line that three structures are identical, the helical form dish of righting raised line is located in cylindrical body, the bearing of trend of righting raised line is crossing with the bus of cylindrical body, and the bearing of trend of righting raised line at each some place and cylindrical body cross this point bus between angle the same, each righting raised line all offers by-pass prot, jet nozzle is sealed and installed with in by-pass prot, the outer peripheral face upper sleeve gasket of jet nozzle is provided with O-ring seal, the outer peripheral face of O-ring seal and the hole wall of by-pass prot are sealed and matched, jet nozzle is installed in by-pass prot by O-ring seal and jump ring, O-ring seal is set on the inner segment of jet nozzle, and jump ring is located in the outer section of jet nozzle.
2. rotating jet screw rod centralizer according to claim 1, it is characterized in that described by-pass prot is the shoulder hole near cylindrical body center, the diameter of inner side by-pass prot is less than the diameter of outside by-pass prot, and the quantity of by-pass prot at least has two according to actual needs.
3. rotating jet screw rod centralizer according to claim 1, it is characterized in that described jet nozzle is made up of impeller and housing, impeller is placed in the cavity body of housing, impeller is three rectangular coil shape structures, the screw wing direction of rotation of impeller is dextrorotation, and the two ends of impeller are cone structure; Housing is hollow pipe column structure, and the outlet of housing is tapered, and its exit inside diameter is less than the screw wing external diameter of impeller, and the housing of jet nozzle is installed in the by-pass prot of outside by jump ring, and the outer tube wall of housing is provided with O-ring seal; The screw wing external diameter of impeller is greater than the diameter of inner side by-pass prot.
4. rotating jet screw rod centralizer according to claim 1, is characterized in that the inner edge of described jump ring is fastened in annular groove that the outer peripheral face of jet nozzle is offered, and the outer rim of jump ring is fastened in annular groove that by-pass prot hole wall is offered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805246.6U CN205036316U (en) | 2015-10-16 | 2015-10-16 | Rotatory efflux screw rod centralizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520805246.6U CN205036316U (en) | 2015-10-16 | 2015-10-16 | Rotatory efflux screw rod centralizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205036316U true CN205036316U (en) | 2016-02-17 |
Family
ID=55295225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520805246.6U Expired - Fee Related CN205036316U (en) | 2015-10-16 | 2015-10-16 | Rotatory efflux screw rod centralizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205036316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096342A (en) * | 2019-06-18 | 2020-12-18 | 中国石油化工股份有限公司 | Drilling and accelerating tool and method for downhole depressurization and plugging |
-
2015
- 2015-10-16 CN CN201520805246.6U patent/CN205036316U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096342A (en) * | 2019-06-18 | 2020-12-18 | 中国石油化工股份有限公司 | Drilling and accelerating tool and method for downhole depressurization and plugging |
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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: 20160217 Termination date: 20191016 |
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| CF01 | Termination of patent right due to non-payment of annual fee |