CN209603912U - Tie back tool, flow string and oil production equipment - Google Patents
Tie back tool, flow string and oil production equipment Download PDFInfo
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- CN209603912U CN209603912U CN201822119659.5U CN201822119659U CN209603912U CN 209603912 U CN209603912 U CN 209603912U CN 201822119659 U CN201822119659 U CN 201822119659U CN 209603912 U CN209603912 U CN 209603912U
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- guide shoe
- lower tubular
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Abstract
The utility model provides a kind of tie back tool, flow string and oil production equipment, tie back tool includes ontology, guide shoe and top connection, top connection is connected with the upper end of ontology, top connection is for connecting tubing string, guide shoe is connected with the lower end of ontology, guide shoe is for connecting lower tubular column, the internal diameter of guide shoe is greater than the outer diameter of lower tubular column, tie back tool is additionally provided with for limiting the mobile stop device of lower tubular column, fishing basket and milling tool are additionally provided in ontology, milling tool is arranged close to guide shoe, milling tool is for lower tubular column of polishing, the top of milling tool is arranged in fishing basket, the internal diameter of fishing basket is gradually increased from top to bottom.The utility model no replacement is required lower tubular column and packer, simplifies the maintenance activity step of fracture tubing string, and has saved time and cost.
Description
Technical field
The utility model relates to petroleum gas production technology more particularly to a kind of tie back tools, flow string and oil recovery
Equipment.
Background technique
In oil/gas well production operation, tubing string be mainly used in drilling process and complete well after to the support of the borehole wall to provide oil
The production channel of gas, since underground geological conditions is ever-changing, force-bearing situation is complicated, therefore the requirement to tubing string is very high.Oil gas
Well is influenced in production by down-hole high pressure, and tubing string can shorten, and oil gas well depth is deeper, and upper and lower multistage tubing string exists different
Heart phenomenon, tubing string can be shaken in production process, under above-mentioned each factor effect, if tubing string easily occurs to break when oil/gas well produces
It splits, tubing string fracture will lead to the whole mouth oil/gas well underproduction or scrap, and therefore, the tubing string of on-call maintenance fracture is one in oil/gas well production
The important task of item.
Since the depth of oil/gas well is deeper, the even upper km of generally several hundred rice, and the specific location being broken generally is difficult to
It finds out, therefore, generally repairs operation by the way of integral replacing in the prior art, i.e., first by the tubing string upper half of fracture
Divide；It recycles grinding tool to grind off the packer being mounted on the tubing string of lower half portion, falls packer；Then by lower half
The packer being in charge of column and falling rises；It then will be to entire pit shaft prune job；Finally by new tubing string and packer tripping in
In well, completion practice is carried out again.
It using the scheme of the prior art, needs first to grind off packer after acting top half tubing string, then salvages lower half
Part tubing string and packer, the quite time-consuming effort of whole process；Additionally due to need replacing entire tubing string, thus maintenance cost compared with
It is high.
Utility model content
In order to overcome the drawbacks described above under the prior art, the purpose of this utility model is to provide a kind of tie back tool, adopt
Tubing string and oil production equipment, when carrying out tubing string maintenance using the tie back tool of the utility model, no replacement is required lower half portion tubing string
And packer, maintenance activity step is simplified, and saved time and cost.
An embodiment of the present invention provides a kind of tie back tool, including ontology, guide shoe and top connection, the top connection with
The upper end of the ontology is connected, and for connecting tubing string, the guide shoe is connected with the lower end of the ontology, described for the top connection
Guide shoe is greater than the outer diameter of the lower tubular column for connecting lower tubular column, the internal diameter of the guide shoe, and the inner wall of the top connection, which is equipped with, to be used
In limiting the mobile stop device of the lower tubular column, the tie back tool is additionally provided with fishing basket and milling tool, the milling tool
It is arranged close to the guide shoe, the milling tool is arranged in for the lower tubular column of polishing, the fishing basket in the milling tool
The internal diameter of top, the fishing basket is gradually increased from top to bottom.
Tie back tool as described above, optionally, the stop device are the flange being arranged in the top connection, described
One end of flange connects the inner wall of the top connection, and the other end is axially extending towards the top connection.
Tie back tool as described above is optionally additionally provided with seal assembly, the seal assembly setting in the top connection
In the lower section of the stop device.
Tie back tool as described above, optionally, the milling tool includes casing section mill and multiple milling rings, multiple described
Milling ring is uniformly distributed circumferentially on the inner wall of the guide shoe, and the top of multiple milling rings is arranged in the casing section mill,
The inner wall of the casing section mill is equipped with multiple roll flutes.
Tie back tool as described above, optionally, the casing section mill pass through the inner wall stationary phase of locating piece and the ontology
Even；Multiple roll flutes are diamond roll flute.
Tie back tool as described above, optionally, the milling ring are weldingly fixed on the inner wall of the guide shoe.
Tie back tool as described above, optionally, the lateral wall of the fishing basket are equipped with left-handed gingival cyst of mucous gland in the newborn button screw thread, the ontology
Inner wall be equipped with left-handed gingival cyst of mucous gland in the newborn button screw thread compatible with the fishing lateral wall of basket, it is described fish out basket and the ontology inner wall
It is threadedly coupled；The inner sidewall of the fishing basket is equipped with buttless thread, and the tooth tip of the buttless thread is towards the top connection.
Tie back tool as described above, optionally, the lateral wall of the fishing basket are equipped with multiple flutings, and the fluting is parallel
In the axial direction setting of the ontology, the upper surface and lower end surface of at least one fluting connection fishing basket.
Another embodiment of the utility model provides a kind of flow string, including upper tubing string and lower tubular column, the upper tubing string and
It is attached between lower tubular column using as above any tie back tool.
Another embodiment of the utility model provides a kind of oil production equipment, including production tree and flow string as described above,
The production tree is connected with the flow string, and the production tree is located at the top of the flow string.
Tie back tool, flow string and oil production equipment provided by the utility model, tie back tool include ontology, guide shoe and on
Connector, the top connection are connected with the upper end of the ontology, the top connection for connecting tubing string, the guide shoe with described
The lower end of body is connected, and for the guide shoe for connecting lower tubular column, the internal diameter of the guide shoe is greater than the outer diameter of the lower tubular column, it is described on
The inner wall of connector is equipped with for limiting the mobile stop device of the lower tubular column, is additionally provided with fishing basket and milling work in the ontology
Tool, the milling tool are arranged close to the guide shoe, and the milling tool exists for the lower tubular column of polishing, the fishing basket setting
The internal diameter of the top of the milling tool, the fishing basket is gradually increased from top to bottom.The utility model passes through guide shoe for lower tubular column
It is connected to inside tie back tool, lower tubular column is positioned by stop device, being equipped with milling tool in ontology can be by down tube
The removal of the impurity such as the burr of column breaking part, and retained lower tubular column by the fishing basket that internal diameter is gradually increased from top to bottom, thus
So that upper tubing string and lower tubular column are connected；Compared with the prior art, the utility model no replacement is required lower tubular column and packer, simplifies
It is broken the maintenance activity step of tubing string, and has saved time and cost.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structure diagram for the tie back tool that an embodiment of the present invention provides；
Fig. 2 is the partial enlarged view in the portion A in Fig. 1；
Fig. 3 is the plan structure schematic diagram of Fig. 2.
Appended drawing reference:
100- ontology；
110- fishes out basket；
111- fluting；
120- casing section mill；
200- guide shoe；
210- milling ring；
300- top connection；
310- stop device；
320- seal assembly.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.
Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.In the absence of conflict, following implementation
Feature in example and embodiment can be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
It is connected directly, the mutual of connection inside two elements or two elements can also be can be indirectly connected through an intermediary
Interactively.For the ordinary skill in the art, it can understand that above-mentioned term is practical new at this as the case may be
Concrete meaning in type.
It should be noted that term " first ", " second " are only used for facilitating description different in the description of the present invention,
Component, be not understood to indicate or imply ordinal relation, relative importance or implicitly indicate indicated technical characteristic
Quantity." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one of the features.
Petroleum be include gaseous state present in nature, liquid and solid hydrocarbon compound and a small amount of impurity composition answer
Miscellaneous mixture.Oil gas is present in oil generation gas-bearing formation after earth's crust generation with dispersity, is then passed through migration and is entered reservoir simultaneously
Aggregation forms oil-gas reservoir in the geological stratification with good preservation condition.Oil exploitation is in the reservoir for storing petroleum to stone
The process that oil is excavated and extracted, reservoir, which has, allows gas stream in the storage space wherein passed through, and reservoir space includes rock
Crack in hole, rock fracture, the hole gap formed through corrosion between stone clast etc., the size of reservoir space void,
Distribution and connection situation affect the flowing of oil gas, to decide the feature of oil-gas mining.
During oil exploitation, oil gas usually first flows into shaft bottom from reservoir, then rises to well head from shaft bottom, then from well
Mouth flows into oil gathering station, and after separating and dehydrating is handled, oil gas flows into oil transportation gas master station and simultaneously transfers out mining area.
Oil exploitation can substantially be divided into three phases:
Primary oil recovery usually relies on the natural energies such as rock expansion, edge water drive, gravity, natural gas expansion and is exploited,
The stage is mainly lifted to the petroleum in oil reservoir voluntarily outside well by oil pipe using natural energy；However, with crude oil and day
The continuous output of right gas, the volume of fluid gradually extends in reservoir rock and stratum, and elastic energy gradually discharges, the stage petroleum
Recovery ratio averagely be only 15-20%.
Secondary oil recovery is mainly that the pressure of oil reservoir is improved by modes such as water filling, gas injections, thus the energy after oil well stop-spraying
Oil well is enough set to continue oil-producing.Wherein, water flooding recovery is to inject water into oil reservoir by special injection well to keep or restore oil reservoir
Pressure, to make the stronger driving force of reservoir formation to improve the exploitation rate and recovery ratio of oil reservoir；Gas injecting mining is mainly benefit
With interfacial tension being reduced, improve permeability the effects of the injection viscosity reduction of gas, expansion, mixed phase, molecule diffusion, and then improve oil
Field tar productivity.Due to the heterogeneity on stratum, fluid is injected generally along the lesser approach of resistance and flows to oil well, and be in resistance
Petroleum in relatively large region and it is some still can not be extracted by the adsorbed petroleum of rock, therefore secondary adopt
The recovery ratio in oily stage is still limited.
Tertiary oil recovery mainly changes the viscosity of crude oil and the absorption to rock by using various physics, chemical method
Property, to increase the fluid ability of crude oil, further increase oil recovery factor.Tertiary oil recovery method mainly includes oil recovery by heating
Method, chemical flooding oil process, miscible displacement of reservoir method, microbial oil displacement method etc..Wherein, thermal recovery processes mainly utilize reduction viscosity of crude
Mode improves recovery ratio, and wherein steam soak is a kind of common oil recovery by heating method, a certain amount of by injecting to oil well
Steam and make the thermal energy of steam to oil reservoir spread, thus greatly reduce viscosity of crude, improve the fluid ability of crude oil；Change
Displacement of reservoir oil method is learned mainly to increase the viscosity of water flooding by injection chemical agent, the viscosity ratio for changing crude oil and water flooding, reduce ground
Gap in layer between the fluid ability of water and the fluid ability of oil, while crude oil is reduced to the adsorptivity of rock to improve the displacement of reservoir oil
Efficiency；Miscible displacement of reservoir method mainly passes through the gases such as injection natural gas, carbon dioxide and mixed phase occurs for crude oil, so that it is viscous to reduce crude oil
Degree and to the adsorptivity of rock；Microbial oil displacement method is made using microorganism and its metabolite cracking heavy hydrocarbon class and paraffin
The macromolecular of petroleum becomes small molecule, while being metabolized the gas for generating and dissolving in crude oil, to reduce viscosity of crude and increase original
The mobility of oil, and then achieve the purpose that improve oil recovery factor.
In oil/gas well production operation, tubing string be mainly used in drilling process and complete well after to the support of the borehole wall to provide oil
The production channel of gas, since underground geological conditions is ever-changing, force-bearing situation is complicated, therefore the requirement to tubing string is very high.Oil gas
Well is influenced in production by down-hole high pressure, and tubing string can shorten, and oil gas well depth is deeper, and upper and lower multistage tubing string exists different
Heart phenomenon, tubing string can be shaken in production process, under above-mentioned each factor effect, if tubing string easily occurs to break when oil/gas well produces
It splits, tubing string fracture will lead to the whole mouth oil/gas well underproduction or scrap, and therefore, the tubing string of on-call maintenance fracture is one in oil/gas well production
The important task of item.
Since the depth of oil/gas well is deeper, the even upper km of generally several hundred rice, and the specific location being broken generally is difficult to
It finds out, therefore, generally repairs operation by the way of integral replacing in the prior art, i.e., first by the tubing string upper half of fracture
Divide；It recycles grinding tool to grind off the packer being mounted on the tubing string of lower half portion, falls packer；Then by lower half
The packer being in charge of column and falling rises；It then will be to entire pit shaft prune job；Finally by new tubing string and packer tripping in
In well, completion practice is carried out again.
It using the scheme of the prior art, needs first to grind off packer after acting top half tubing string, then salvages lower half
Part tubing string and packer, the quite time-consuming effort of whole process；Additionally due to need replacing entire tubing string, thus maintenance cost compared with
It is high.
In order to overcome the drawbacks described above under the prior art, the purpose of this utility model is to provide a kind of tie back tool, adopt
Tubing string and oil production equipment, when carrying out tubing string maintenance using the tie back tool of the utility model, no replacement is required lower half portion tubing string
And packer, maintenance activity step is simplified, and saved time and cost.
It is described below in conjunction with the detailed content to the utility model of attached drawing, so that those skilled in the art can
The more detailed content for understanding the utility model.
Embodiment one
Fig. 1 is the structure diagram for the tie back tool that an embodiment of the present invention provides；Fig. 2 is that the part in the portion A in Fig. 1 is put
Big figure；Fig. 3 is the plan structure schematic diagram of Fig. 2；Please refer to Fig. 1-Fig. 3.The present embodiment provides a kind of tie back tools, including ontology
100, guide shoe 200 and top connection 300, top connection 300 are connected with the upper end of ontology 100, and top connection 300 is used to connect tubing string,
Guide shoe 200 is connected with the lower end of ontology 100, and guide shoe 200 is greater than the outer of lower tubular column for connecting lower tubular column, the internal diameter of guide shoe 200
Diameter, the inner wall of top connection 300 are equipped with for limiting the mobile stop device 310 of lower tubular column, and tie back tool is additionally provided with fishing 110 He of basket
Milling tool, milling tool are arranged close to guide shoe 200, and milling tool is arranged for lower tubular column of polishing, fishing basket 110 in milling tool
Top, fishing basket 110 internal diameter be gradually increased from top to bottom.
Maintenance of the tie back tool of the present embodiment for oil/gas well fracture tubing string is in charge of in the upper half for acting fracture tubing string
After column, lower tubular column remaining in new upper tubing string and well can be reconnected using the tie back tool of the present embodiment, thus
Restore the production of oil/gas well.Specifically, the tie back tool of the present embodiment includes ontology 100, guide shoe 200 and top connection 300, ontology
100, guide shoe 200 and top connection 300 are substantially cylindrical.Top connection 300 is connected with the upper end of ontology 100, top connection 300 with
It can be attached by the way of being threadedly coupled between ontology 100, it, can be in ontology in an optional embodiment
Double ladder lock pin thread screw threads are set on 100 upper end outer surface, double ladder lock female thread spiral shells are set on the lower end inner surface of top connection 300
Line, to realize the threaded connection of the two.The upper end of top connection 300 is for connecting tubing string, between top connection 300 and upper tubing string
It can also be realized and be connected and fixed by the way of being threadedly coupled, details are not described herein again.
Guide shoe 200 is connected with the lower end of ontology 100, and guide shoe 200 is for connecting lower tubular column, under the internal diameter of guide shoe 200 is greater than
The outer diameter of tubing string, so that lower tubular column can be entered in tie back tool by guide shoe 200.Specifically, can be in the lower end of guide shoe 200
Threaded line is set on face, preferably to introduce lower tubular column inside tie back tool.Connection side between guide shoe 200 and ontology 100
Formula can also be by the way of being threadedly coupled, can be on the upper end outer surface of guide shoe 200 in an optional embodiment
Double ladder lock pin thread screw threads are set, double ladder lock female thread screw threads are set on the lower end inner surface of ontology 100, to realize the spiral shell of the two
Line connection.
Tie back tool is additionally provided with fishing basket 110 and milling tool, wherein milling tool is arranged close to guide shoe 200, milling tool
For lower tubular column of polishing, the impurity such as the burr of breaking part are removed, so that lower tubular column surface is again smooth.The fishing setting of basket 110 is being ground
The internal diameter of the top of milling tool, fishing basket 110 is gradually increased from top to bottom, so as to which lower tubular column is retained using fishing basket 110,
It fishes out basket 110 to be removably arranged inside ontology 100, the fishing basket of different inner diameters can be replaced according to different lower tubular column outer diameters
110.The inner wall of top connection 300 is equipped with for limiting the mobile stop device 310 of lower tubular column, and when use can make the upper of lower tubular column
It supports on stop device 310 at end.
The tie back tool of the present embodiment is first cleaned up all parts using preceding, and in each parts surface coating lubricating oil
Rouge smears dope in each threaded connection place, ontology 100 is clamped on bench vice, its rotation is prevented, then by top connection 300
It is connected and fixed with ontology 100, basket 110 will be fished out from the lower section of ontology 100 and milling tool is mounted on inside ontology 100, finally will
Guide shoe 200 is connected and fixed with ontology 100, realizes the assembling of whole device.
Tie back tool provided in this embodiment includes ontology 100, guide shoe 200 and top connection 300, top connection 300 and ontology
100 upper end is connected, and top connection 300 is for connecting tubing string, and guide shoe 200 is connected with the lower end of ontology 100, and guide shoe 200 is used for
Lower tubular column is connected, the internal diameter of guide shoe 200 is greater than the outer diameter of lower tubular column, and the inner wall of top connection 300 is equipped with to be moved for limiting lower tubular column
Dynamic stop device 310, tie back tool are additionally provided with fishing basket 110 and milling tool, and milling tool is arranged close to guide shoe 200, milling
For tool for lower tubular column of polishing, the top of milling tool is arranged in fishing basket 110, and the internal diameter of fishing basket 110 is gradually increased from top to bottom.
Lower tubular column is connected to inside tie back tool by the present embodiment by guide shoe 200, is determined by stop device 310 lower tubular column
Position, the interior milling tool that is equipped with of ontology 100 can remove the impurity such as the burr of lower tubular column breaking part, and from top to bottom by internal diameter
The fishing basket 110 being gradually increased retains lower tubular column, so that upper tubing string and lower tubular column are connected；Compared with the prior art, originally
Embodiment no replacement is required lower tubular column and packer, simplifies the maintenance activity step of fracture tubing string, and saved the time and at
This.
Further, the stop device 310 of the present embodiment is the flange being arranged in top connection 300, and one end of flange connects
The inner wall of connector 300 is connected, the other end is axially extending towards top connection 300.Flange can be an individual part, can also
To be process in top connection 300, for example, the thicker inner wall of top connection 300 is turned a part, on forming it into
State flange.When connecting lower tubular column using the tie back tool of the present embodiment, the upper end of lower tubular column is supported on the flange, to limit
The movement of lower tubular column.
Further, seal assembly 320 is additionally provided in top connection 300, seal assembly 320 is arranged in stop device 310
Lower section.Seal assembly 320 is used to seal the gap between lower tubular column and top connection 300, prevents the leakage of gas, seal assembly
320 include the V-type circle of support ring, spacer ring and opposite installation.
Further, in this embodiment milling tool include casing section mill 120 and multiple milling rings 210, multiple milling rings
210 are uniformly distributed circumferentially on the inner wall of guide shoe 200, and the top of multiple milling rings 210, casing section mill is arranged in casing section mill 120
120 inner wall is equipped with multiple roll flutes.
Specifically, circumferentially shape is arranged on the inner wall of guide shoe 200 multiple milling rings 210, when lower tubular column enters this implementation
After the tie back tool of example, multiple milling rings 210 can carry out set for the first time to lower tubular column and mill, and further cover milling matter to improve
Amount, can be also provided with diamond roll flute on the inner surface of guide shoe 200；The top of milling ring 210 is arranged in casing section mill 120, set
Milling cylinder 120 is fixedly linked by the inner wall of locating piece and ontology 100, opposite to prevent from occurring between casing section mill 120 and ontology 100
The inner wall of rotation, casing section mill 120 is equipped with multiple roll flutes, and multiple roll flutes are diamond roll flute, and can use welding procedure will
Multiple roll flutes are welded on one by one on the inner wall of casing section mill 120, and the specific arranging situation of multiple roll flutes can be selected as needed,
Casing section mill 120 can carry out second of set to lower tubular column and mill, sufficiently to ensure the clean and tidy of lower tubular column surface.
In the present embodiment, milling ring 210 can be fixed on the inner wall of guide shoe 200 by way of welded connecting.
Further, in this embodiment fishing basket 110 lateral wall be equipped with left-handed gingival cyst of mucous gland in the newborn button screw thread, the inner wall of ontology 100
It is equipped with left-handed gingival cyst of mucous gland in the newborn button screw thread compatible with the fishing lateral wall of basket 110, fishing basket 110 is connect with the inner thread of ontology 100,
The mode being connected through a screw thread connects ontology 100 and fishing basket 110, can prevent fishing basket 110 from falling from ontology.Fish out basket 110
Inner sidewall is equipped with buttless thread, and the tooth tip of buttless thread will fish out the tooth of the buttless thread inside basket 110 towards top connection 300
Point is arranged towards top connection 300, can better clamping lower tubular column, prevent lower tubular column from falling from fishing basket 110.
Further, the lateral wall for fishing out basket 110 is equipped with multiple flutings 111, and fluting 111 is parallel to the axis of ontology 100
To setting, the upper surface and lower end surface of at least one 111 connection fishing basket 110 of fluting can make to fish out basket by setting fluting 111
110 have certain stroke so that lower tubular column enter after fishing basket 110 can be softened under the action of lower tubular column it is certain between
Gap, so that fishing basket 110 can be stronger retains lower tubular column, while but also same fishing basket 110 can be adapted to not
With the lower tubular column of diameter.
Embodiment two
The present embodiment provides a kind of flow strings, including upper tubing string and lower tubular column, using such as between upper tubing string and lower tubular column
Tie back tool described in upper embodiment one is attached.
Maintenance of the tie back tool of the present embodiment for oil/gas well fracture tubing string is in charge of in the upper half for acting fracture tubing string
After column, lower tubular column remaining in new upper tubing string and well can be reconnected using the tie back tool of the present embodiment, thus
Restore the production of oil/gas well.Specifically, the tie back tool of the present embodiment includes ontology, guide shoe and top connection, ontology, guide shoe and on
Connector is substantially cylindrical.Top connection is connected with the upper end of ontology, can be using being threadedly coupled between top connection and ontology
Mode is attached, and in an optional embodiment, double ladder lock pin thread spiral shells can be arranged on the upper end outer surface of ontology
Double ladder lock female thread screw threads are arranged in line on the lower end inner surface of top connection, to realize the threaded connection of the two.Top connection it is upper
End can also be realized by the way of being threadedly coupled between top connection and upper tubing string and be connected and fixed, herein for connecting upper tubing string
It repeats no more.
Guide shoe is connected with the lower end of ontology, and guide shoe is greater than the outer diameter of lower tubular column for connecting lower tubular column, the internal diameter of guide shoe, with
Enter lower tubular column in tie back tool by guide shoe.Specifically, threaded line can be arranged on the lower end surface of guide shoe, with more
Good introduces lower tubular column inside tie back tool.Connection type between guide shoe and ontology can also be using the side being threadedly coupled
In an optional embodiment double ladder lock pin thread screw threads can be arranged, in ontology in formula on the upper end outer surface of guide shoe
Double ladder lock female thread screw threads are set on the inner surface of lower end, to realize the threaded connection of the two.
Tie back tool is additionally provided with fishing basket and milling tool, wherein milling tool is arranged close to guide shoe, and milling tool is for beating
Lower tubular column is ground, the impurity such as the burr of breaking part are removed, so that lower tubular column surface is again smooth.The upper of milling tool is arranged in fishing basket
Side, the internal diameter for fishing out basket are gradually increased from top to bottom, and so as to be retained lower tubular column using fishing basket, fishing basket is removably arranged
In body interior, the fishing basket of different inner diameters can be replaced according to different lower tubular column outer diameters.The inner wall of top connection is equipped with for limiting
The mobile stop device of lower tubular column processed, when use, can be such that the upper end of lower tubular column supports on stop device.
Flow string provided in this embodiment, tie back tool include ontology, guide shoe and top connection, top connection and ontology
Upper end is connected, and for connecting tubing string, guide shoe is connected with the lower end of ontology for top connection, and guide shoe is used to connect lower tubular column, guide shoe
Internal diameter is greater than the outer diameter of lower tubular column, and the inner wall of top connection is equipped with for limiting the mobile stop device of lower tubular column, also sets in ontology
There are fishing basket and milling tool, milling tool is arranged close to guide shoe, and milling tool is arranged for lower tubular column of polishing, fishing basket in milling work
The top of tool, the internal diameter for fishing out basket are gradually increased from top to bottom.Lower tubular column is connected in tie back tool by the present embodiment by guide shoe
Portion positions lower tubular column by stop device, and being equipped with milling tool in ontology can be by the burr etc. of lower tubular column breaking part
Impurity removal, and retained lower tubular column by the fishing basket that internal diameter is gradually increased from top to bottom, so that upper tubing string and down tube
Column is connected；Compared with the prior art, the present embodiment no replacement is required lower tubular column and packer simplifies the maintenance activity of fracture tubing string
Step, and saved time and cost.
Embodiment three
The present embodiment provides a kind of oil production equipments to recover the oil including flow string described in production tree and embodiment as above two
Tree is connected with flow string, and production tree is located at the top of flow string.
Maintenance of the tie back tool of the present embodiment for oil/gas well fracture tubing string is in charge of in the upper half for acting fracture tubing string
After column, lower tubular column remaining in new upper tubing string and well can be reconnected using the tie back tool of the present embodiment, thus
Restore the production of oil/gas well.Specifically, the tie back tool of the present embodiment includes ontology, guide shoe and top connection, ontology, guide shoe and on
Connector is substantially cylindrical.Top connection is connected with the upper end of ontology, can be using being threadedly coupled between top connection and ontology
Mode is attached, and in an optional embodiment, double ladder lock pin thread spiral shells can be arranged on the upper end outer surface of ontology
Double ladder lock female thread screw threads are arranged in line on the lower end inner surface of top connection, to realize the threaded connection of the two.Top connection it is upper
End can also be realized by the way of being threadedly coupled between top connection and upper tubing string and be connected and fixed, herein for connecting upper tubing string
It repeats no more.
Guide shoe is connected with the lower end of ontology, and guide shoe is greater than the outer diameter of lower tubular column for connecting lower tubular column, the internal diameter of guide shoe, with
Enter lower tubular column in tie back tool by guide shoe.Specifically, threaded line can be arranged on the lower end surface of guide shoe, with more
Good introduces lower tubular column inside tie back tool.Connection type between guide shoe and ontology can also be using the side being threadedly coupled
In an optional embodiment double ladder lock pin thread screw threads can be arranged, in ontology in formula on the upper end outer surface of guide shoe
Double ladder lock female thread screw threads are set on the inner surface of lower end, to realize the threaded connection of the two.
Tie back tool is additionally provided with fishing basket and milling tool, wherein milling tool is arranged close to guide shoe, and milling tool is for beating
Lower tubular column is ground, the impurity such as the burr of breaking part are removed, so that lower tubular column surface is again smooth.The upper of milling tool is arranged in fishing basket
Side, the internal diameter for fishing out basket are gradually increased from top to bottom, and so as to be retained lower tubular column using fishing basket, fishing basket is removably arranged
In body interior, the fishing basket of different inner diameters can be replaced according to different lower tubular column outer diameters.The inner wall of top connection is equipped with for limiting
The mobile stop device of lower tubular column processed, when use, can be such that the upper end of lower tubular column supports on stop device.
Oil production equipment provided in this embodiment, tie back tool include ontology, guide shoe and top connection, top connection and ontology
Upper end is connected, and for connecting tubing string, guide shoe is connected with the lower end of ontology for top connection, and guide shoe is used to connect lower tubular column, guide shoe
Internal diameter is greater than the outer diameter of lower tubular column, and the inner wall of top connection is equipped with for limiting the mobile stop device of lower tubular column, also sets in ontology
There are fishing basket and milling tool, milling tool is arranged close to guide shoe, and milling tool is arranged for lower tubular column of polishing, fishing basket in milling work
The top of tool, the internal diameter for fishing out basket are gradually increased from top to bottom.Lower tubular column is connected in tie back tool by the present embodiment by guide shoe
Portion positions lower tubular column by stop device, and being equipped with milling tool in ontology can be by the burr etc. of lower tubular column breaking part
Impurity removal, and retained lower tubular column by the fishing basket that internal diameter is gradually increased from top to bottom, so that upper tubing string and down tube
Column is connected；Compared with the prior art, the present embodiment no replacement is required lower tubular column and packer simplifies the maintenance activity of fracture tubing string
Step, and saved time and cost.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of tie back tool, which is characterized in that including ontology, guide shoe and top connection, the top connection is upper with the ontology
End is connected, and for connecting tubing string, the guide shoe is connected with the lower end of the ontology for the top connection, and the guide shoe is for connecting
Lower tubular column, the internal diameter of the guide shoe are greater than the outer diameter of the lower tubular column, the inner wall of the top connection be equipped with for limit it is described under
The mobile stop device of tubing string, the tie back tool are additionally provided with fishing basket and milling tool, and the milling tool is close to the guide shoe
The top of the milling tool, the fishing basket is arranged in for the lower tubular column of polishing, the fishing basket in setting, the milling tool
Internal diameter be gradually increased from top to bottom.
2. tie back tool according to claim 1, which is characterized in that the stop device is to be arranged in the top connection
Flange, one end of the flange connects the inner wall of the top connection, and the other end is axially extending towards the top connection.
3. tie back tool according to claim 2, which is characterized in that seal assembly is additionally provided in the top connection, it is described
The lower section of the stop device is arranged in seal assembly.
4. tie back tool according to claim 1, which is characterized in that the milling tool includes casing section mill and multiple millings
Ring, multiple milling rings are uniformly distributed circumferentially on the inner wall of the guide shoe, and the casing section mill is arranged in multiple mills
The top of ring is milled, the inner wall of the casing section mill is equipped with multiple roll flutes.
5. tie back tool according to claim 4, which is characterized in that the casing section mill passes through locating piece and the ontology
Inner wall is fixedly linked；Multiple roll flutes are diamond roll flute.
6. tie back tool according to claim 4, which is characterized in that the milling ring is weldingly fixed on the interior of the guide shoe
On wall.
7. tie back tool according to claim 1, which is characterized in that the lateral wall of the fishing basket is equipped with left-handed gingival cyst of mucous gland in the newborn button spiral shell
The inner wall of line, the ontology is equipped with left-handed gingival cyst of mucous gland in the newborn button screw thread compatible with the fishing lateral wall of basket, the fishing basket and institute
State the inner thread connection of ontology；The inner sidewall of the fishing basket is equipped with buttless thread, and the tooth tip of the buttless thread is towards institute
State top connection.
8. tie back tool according to claim 7, which is characterized in that the lateral wall of the fishing basket is equipped with multiple flutings,
Described slot is parallel to the axial setting of the ontology, the upper surface and lower end of at least one fluting connection fishing basket
Face.
9. a kind of flow string, which is characterized in that including upper tubing string and lower tubular column, using such as between the upper tubing string and lower tubular column
Tie back tool described in any one of claims 1-8 is attached.
10. a kind of oil production equipment, which is characterized in that described to adopt including production tree and flow string as described in claim 9
Oil tree is connected with the flow string, and the production tree is located at the top of the flow string.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119659.5U CN209603912U (en) | 2018-12-18 | 2018-12-18 | Tie back tool, flow string and oil production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822119659.5U CN209603912U (en) | 2018-12-18 | 2018-12-18 | Tie back tool, flow string and oil production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209603912U true CN209603912U (en) | 2019-11-08 |
Family
ID=68397457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822119659.5U Active CN209603912U (en) | 2018-12-18 | 2018-12-18 | Tie back tool, flow string and oil production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209603912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894504A (en) * | 2020-07-30 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Hydraulic sealing patch connector suitable for casing and oil pipe |
-
2018
- 2018-12-18 CN CN201822119659.5U patent/CN209603912U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111894504A (en) * | 2020-07-30 | 2020-11-06 | 合力（天津）能源科技股份有限公司 | Hydraulic sealing patch connector suitable for casing and oil pipe |
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