CN206737841U - A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside - Google Patents

Abstract

The utility model discloses a kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, the composite oil pipe being made up of the heat-insulated shell of semicircle of two docking at the outer protection tube outside protection band of being shaped outside anticorrosion antiwear layer, oil pipe outer heat insulation layer, insulating in steel oil pipe, oil pipe, sizing protection band, tubing coupling join operation section.An inner tube is embedded in the oil pipe as anticorrosion antiwear layer in oil pipe；One layer of insulating is equably wrapped up in the oil pipe interlude oil-pipe external wall; uniformly overlap joint winds insulating sizing protection band outside insulating, and heat-insulation and heat-preservation oil pipe the outer protection tube and anti-displacement forced seal device are provided with outside sizing protection band；Two semicircle heat-insulated shells docked and trapezoidal O-ring seal are mounted with tubing manipulation section.The utility model can be effectively reduced crude oil and give rise to the loss of well head process Crude Oil own temperature from shaft bottom and improve the fluidised form of crude oil in the wellbore, can efficiently solve wax deposition, fouling, rod and tube partial-wear, reduce oil pumper load the problems such as.

Description

A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside

Technical field

It the utility model is related to a kind of flow string suitable for oil field machinery oil well and adopt geothermal water well tubing string Inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside.

Background technology

At present generally mode is spreaded in the actual production process of oil field (not plus any oil pipe using what pure light pipe tubing string recovered the oil Heat-insulation and heat-preservation and eccentric abrasion prevention measure), adopt geothermal water well tubing string be also by the way of pure light pipe tubing string adopts geothermal water, these The problem of descending natural heat energy to waste and underuse in large quantities be present in the mode for recovering the oil and adopting hot water.Pure light pipe tubing string recovers the oil Mode specifically exist the high crude oil of deep layer position natural temperature by mechanical lift by crude oil lifting arrive well head when, crude oil own temperature A large amount of losses, make crude oil poor fluidity, wax deposition in the wellbore, cause the increase of oil pumper load, also need to use hot water well-flushing when serious, Wellhead crue oil temperature is improved with electrical heating, with adding various chemical viscosity reduction agent, paraffin remover come viscosity reduction wax removal；It is inclined specifically to there is rod tube The technical problem such as mill, frictional resistance is big between rod tube, fouling, rod tube well damage, increases oil recovery production cost, waste electric energy and The heat energy of surface gathering system heating furnace.

The content of the invention

The purpose of this utility model is to provide a kind of inner liner abrasive resistant, wraps up in heat-insulation and heat-preservation composite oil pipe outside, can effectively solve the problem that Rod and tube partial-wear, fouling, rod tube well damage problem；Crude oil can be effectively reduced and flow to well head process Crude Oil itself from shaft bottom Temperature loss problem, and improve viscosity, wax deposition, the fluidised form of crude oil in the wellbore, realized in actual production and improve former well head original 15~30 DEG C of oil temperature, so as to solve thermal well flushing plus various chemoprevention medicaments, electrical heating viscosity reduction, reduce oil pumper load, oil well Economize on electricity and simplify ground gathering and transportation technology flow, triple-pipe heat tracing is changed to single tube does not heat normal temperature conveying, remove the system of water heater etc. one Row significant technology issues, reach energy-saving and emission-reduction, extra earning synergy, the purpose for substantially reducing cost of oil production.

The technical solution adopted in the utility model is as follows：

A kind of inner liner abrasive resistant, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, the both ends of the oil pipe are to be machined with externally threaded screw thread Section, the part close to both ends thread segments are two lever pieces, and the part between two lever pieces is interlude, between oil pipe and oil pipe by Tubing coupling links up oil pipe use of going into the well；One inner tube of fixed setting-in (2) is prevented as in oil pipe in described oil pipe (1) Rotten wearing layer, the length of inner tube (2) are more than oil pipe (1), and the both ends of the surface protrusion of inner tube is outside oil pipe (1) end end face；Institute State oil pipe (1) interlude oil-pipe external wall and equably wrap up one layer of insulating (3), it is uniform in the outside of insulating (3) Ground overlap joint winding insulating sizing protection band (4), insulating will be wrapped up on the outside of oil pipe interlude and thermal insulation layer is determined After type protection band, it is penetrated in the lump in heat-insulation and heat-preservation oil pipe the outer protection tube (5)；At the oil pipe (1) interlude both ends There is provided anti-displacement forced seal device, anti-displacement forced seal device is respectively by the adjacent fixation being directly sleeved on oil pipe (1) Institute is formed with certain oblique after steel ring (6), anti-displacement location ring (7), O-ring seal (8) and the outer protection tube (5) are forced compression The reducer of degree constitutes jointly；At described oil pipe connection box cupling (13) and lever piece, its periphery is fixed with prefabricated in advance The heat-insulated shell of semicircle (10) of two docking with reinforcement, is symmetrically arranged with the heat-insulated shell of semicircle (10) of two docking Some groups of shell fastening screws (11), heat-barrier material is filled with the gap of the heat-insulated shell reinforcement of semicircle of two docking (12), the heat-insulated shell of semicircle of two docking is coated after heat-barrier material is filled with along the inner surface and both ends of the surface of semicircle close Sealing (14)；End in the end of described oil pipe (1) interlude with two heat-insulated shells of the semicircle docked (10) at lever piece Trapezoidal O-ring seal (9) is provided between portion.

Said inner tube (2) is thermoplastic high density's polyethylene compound pipe or superhigh molecular polyethylene compound pipe, by interior The end socket of pipe both ends of the surface and interior tubular elastic recover function, inner tube is firmly fastened in oil pipe.

By insulation material be sleeved on a waterproof, every in the adiabatic bagging (15) of radiant heat into being integral, then uniformly It is wrapped on the outside of the oil pipe of oil pipe (1) interlude, forms described insulating (3)；It is equal in the outside of insulating (3) Even overlap joint is wound with is close to the sizing protection band (4) that tightly wraps by thermal insulation layer, and sizing protection band (4) is from the strong fiber of stretching resistance Band；The outside of sizing protection band (4) be thermal insulation protection oil pipe the outer protection tube (5), the outer protection tube (5) select seamless steel pipe or Glass reinforced plastic pipe material makes.

The insulation material selects aeroge nano super heat-insulation and heat-preservation felt.

Anti- displacement forced seal device is provided with the oil pipe (1) interlude both ends, the device is by fixed steelring (6) be welded on the setting position of oil-pipe external wall, then by with enhancing nylon make anti-displacement location ring (7), O-ring seal (8) Be sleeved on the outside of fixed steelring (6), finally the outer protection tube (5) outermost end by hydraulic test by this at outer layer protect Pillar (5) and O-ring seal (8) are by thicker external diameter, and pressure is compressed to thinner external diameter, with the end shape of oil pipe interlude The reducer of the outer protection tube of sealing is withheld into the pressure for having constant slope.

The heat-insulated shell of semicircle (10) for two docking being fixed on tubing coupling and lever piece is from enhancing nylon material Material is made by Shooting Technique；Multigroup reinforcement is provided with shell；It is filled with gap between reinforcement heat-insulated Material；One layer of fluid sealant is coated in the inner surface and both ends of the surface of two heat-insulated shells of semicircle.

In the end of oil pipe (1) intermediate ends with being set at lever piece between the end of two heat-insulated shells of the semicircle docked (10) Trapezoidal O-ring seal (9), trapezoidal O-ring seal material selection nitrile rubber material are put.

The utility model has the advantages that：By the inner tube being embedded in oil pipe can effectively solve the problem that oil pipe internal corrosion, fouling, Rod tube well damage caused by rod and tube partial-wear；Stratum itself heat energy is made full use of, it is heat-insulated by increasing oil pipe on oil pipe column Heat insulation function, the loss of well head process Crude Oil own temperature is given rise to reduce crude oil from shaft bottom higher temperature, realize and improve Pit shaft and Wellhead crue oil temperature, improve crude oil viscosity in the wellbore, wax deposition, fluidised form, realized in actual production and improve former well Mouthful 15~30 DEG C of crude oil temperature, so as to solve thermal well flushing plus various chemoprevention medicaments, electrical heating viscosity reduction, reduce oil pumper load, Oil well economize on electricity and simplify ground gathering and transportation technology flow, triple-pipe heat tracing be changed to single tube do not heat normal temperature conveying, remove water heater etc. A series of significant technology issues, it is really achieved energy-saving and emission-reduction, extra earning synergy, substantially reduces cost of oil production.

The more prominent substantive distinguishing features of the utility model are：1st, at heat-insulation and heat-preservation oil pipe both ends, there is provided anti-displacement pressure Sealing device, the device successfully solve the sealing problem of oil pipe end, so as to which the oil water mixture ensured in oil well can not enter Enter in insulating and reduce heat insulation and preservation effect, successfully solve heat-insulation and heat-preservation oil pipe during lower oil tube with pit shaft Because producing larger frictional force between middle sleeve, and cause caused dislocation between the outer protection tube and oil pipe insulating inclined Move.Simultaneously by heat-insulation and heat-preservation oil pipe outermost layer protection pipe (5), the high density polyethylene (HDPE) composite wood relatively low by holding external pressure ability originally Material use instead seamless steel pipe, glass reinforced plastic pipe or other high intensity hold external pressure material making tubing, thoroughly solved after improvement due to After the outer protection tube crimp, caused by insulating it is thinning and reduce its effect of heat insulation, caused by the outer protection tube (5) Make oil pipe end sealing bad with the increase of the annular pressure of oil pipe (1), caused by former protective layer part thickening cause oil pipe to carry Many technical problems such as the accident do not got up.

2nd, the heat-insulated shell of semicircle by two docking in tubing coupling and lever piece has carried out larger improvement, has selected increasing Strong nylon or other Materials with High Strength make the heat-insulated shell of semicircle, hold external pressure ability for the enhancing heat-insulated shell of semicircle, add in shell More multigroup reinforcement；To increase the heat-insulating property of the heat-insulated shell of semicircle, it is filled with the gap in shell between reinforcement Heat-barrier material；For sealed when solving the problems, such as the docking of two semi circular shells it is bad enter liquid, in two heat-insulated shells of semicircle Surface and both ends of the surface coat one layer of fluid sealant.Solves the former pure heat-insulated shell of nylon structure semicircle outside although being improved more than See that indeformable but effect of heat insulation is poor, the heat-insulated shell of semicircle of folder heat-barrier material outward appearance in underground higher temperature among former fourth is fine The technical problems such as deformation.

3rd, anticorrosion antiwear layer in the oil pipe that will be embedded in oil pipe, is used in conjunction with same with the insulating of oil pipe outer wrapping In a piece oil pipe, the composite oil pipe function of 2 kinds of function superpositions is reached, so as to solve all skills described in description above Art problem, the effect for playing the oil pipe described in the patent is bigger, overcomes shortcoming and defect present in prior art.

Brief description of the drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is Fig. 1 along A-A sectional views.

Fig. 3 is Fig. 1 local I enlarged diagram.

Fig. 4 is Fig. 3 along B-B sectional views.

Embodiment

A kind of inner liner abrasive resistant described in the utility model, the structure for wrapping up in heat-insulation and heat-preservation composite oil pipe outside, as shown in Figure 1, Figure 2, figure 3rd, shown in Fig. 4：A kind of inner liner abrasive resistant, heat-insulation and heat-preservation oil pipe is wrapped up in outside, described oil pipe both ends are to be machined with externally threaded thread segment, Part close to both ends thread segments is two lever pieces, and the part between two lever pieces is interlude, by oil between oil pipe and oil pipe Pipe box cupling links up oil pipe use of going into the well；One inner tube of fixed setting-in (2) is resistance to as anti-corrosion in oil pipe in the oil pipe (1) Layer is ground, the length of inner tube (2) is more than oil pipe (1), and inner tube both ends of the surface protrusion is outside oil pipe end end face；In the oil pipe (1) Interlude oil-pipe external wall equably wraps up one layer of insulating (3), and winding is equably overlapped in the outside of insulating (3) Insulating sizing protection band (4), after insulating and thermal insulation layer sizing protection band will have been wrapped up on the outside of oil pipe interlude, It is penetrated in the lump in heat-insulation and heat-preservation oil pipe the outer protection tube (5).

One inner tube of fixed setting-in (2) is as anticorrosion antiwear layer in oil pipe, the length of inner tube (2) in described oil pipe (1) More than the both ends of the surface of oil pipe (1) and prominent outside oil pipe (1) end face, inner tube (2) is compound using thermoplastic high density's polyethylene Material or ultra-high molecular weight polyethylene composite material make, and recover function by the end socket at inner tube both ends and interior tubular elastic, make interior Pipe firmly can be fastened in oil pipe.

Aeroge nano super heat-insulation and heat-preservation felt or other insulation materials are sleeved on a waterproof, the thermal insulation every radiant heat Into (adiabatic bagging is waterproof, the bagging made every radiation hot material) is integral in bagging (15), oil is then uniformly wrapped in On the outside of the oil pipe for managing (1) interlude, described insulating (2) is formed.

To be uniformly close to heat-insulating heat-preserving material to be wrapped on the outside of oil pipe (1), while prevent in poling by waterproof, every spoke Penetrate thermal insulation bagging to scratch, therefore use the strong fiber band of stretching resistance uniformly to be overlapped as sizing protection band (4) and be wrapped in heat-insulated guarantor The outside of adiabator.

The outer protection tube (5) holds external pressure material from seamless steel pipe, glass reinforced plastic pipe or other high intensity and made, to overcome The external pressure that head of liquid is formed in pit shaft, by the outer protection tube (5) crimp, the outer protection tube (5) is if be squeezed buckling Shape, insulating can be caused thinning and reduce effect of heat insulation, can also cause the annular space pressure of the outer protection tube (5) and oil pipe (1) Power increases and makes oil pipe end sealing effectiveness bad, and oil pipe part caliber thickening can be caused when more serious, causes oil pipe to be unable to lift The accident come occurs.

Anti- displacement forced seal device is provided with the oil pipe (1) interlude both ends, the device is by fixed steelring (6) be welded on the setting position of oil-pipe external wall, then by with enhancing nylon make anti-displacement location ring (7), O-ring seal (8) Be sleeved on the outside of fixed steelring (6), finally the outer protection tube (5) outermost end by hydraulic test by this at outer layer protect Pillar (5) and O-ring seal (8) are compressed to thinner external diameter, the so end in oil pipe interlude by thicker external diameter, pressure The reducer of the outer protection tube of constant slope is formd, by the adjacent fixed steelring (6) being directly sleeved on oil pipe (1), is prevented Displacement location ring (7), O-ring seal (8), have constant slope the outer protection tube (5) reducer collective effect, constituted Whole anti-displacement forced seal device；The device is to be entered the outer protection tube (5) and the fine O-ring seal of fourth (8) by hydraulic test Row is synchronous to force undergauge compression, is improved after compression close between the density of O-ring seal and the outer protection tube and O-ring seal Degree, reached heat-insulation and heat-preservation oil pipe end sealing requirement, so as to the oil water mixture that ensure that in oil well can not enter it is heat-insulated Effect of heat insulation is reduced in heat-insulation layer；The device is in the outer protection tube reducer for having constant slope and fixed steelring (6), anti-position Move locating ring (7) collective effect under, solve heat-insulation and heat-preservation oil pipe during lower oil tube between pit shaft middle sleeve because production Raw larger frictional force, and cause caused dislocation skew between the outer protection tube and oil pipe insulating.

The heat-insulated shells of semicircle (10) for two docking being fixed on tubing coupling and lever piece be from enhancing nylon or Other Materials with High Strength are made by Shooting Technique；For enhancing the heat-insulated shell of semicircle hold external pressure ability, added in shell compared with Multigroup reinforcement；To increase the heat-insulating property of the heat-insulated shell of semicircle, it is filled with the gap in shell between reinforcement heat-insulated Material；For sealed when solving the problems, such as the docking of two semi circular shells it is bad enter liquid, in the inner surface of two heat-insulated shells of semicircle And both ends of the surface coat one layer of fluid sealant.

To solve the uncertain problem of spacing when oil pipe is coupled with oil pipe by tubing coupling, in oil pipe (1) intermediate ends End and the end of two heat-insulated shells of the semicircle docked (10) at lever piece between be provided with trapezoidal O-ring seal (9), with Solves the sealing problem for having caused by spacing is not known at this；Trapezoidal O-ring seal material selection fourth is fine or other pressure-resistant, resistance to Oil, heatproof, corrosion resistant elastomeric material.

Processing and mounting means at described (1) two lever piece of oil pipe are：Oil pipe passes through tubing coupling with oil pipe (13) after being connected at the construction field (site), by two prefabricated in advance heat-insulated shells of semicircle (10) dock at the scene and with fastening spiral shell Silk (11) is tightened, and finally installs trapezoidal O-ring seal, and whole installation process is completed.By being used in combination for they, Wear-resisting and heat insulation and preservation effect of the whole tubing string in use of going into the well is ensure that, impact resistance, oil resistant pipe and set in lower oil tube Powerful frictional force between pipe, bear the realization of the functions such as the external pressure powerful in hot clean-up well.

Described aeroge nano super heat-insulation and heat-preservation felt and adiabatic bagging, from the limited public affairs of ShaoXing,ZheJiang city nano science and technology Take charge of the product of production.

Described thermoplastic high density's polyethylene compound pipe or the heat-insulated shell of superhigh molecular polyethylene compound pipe, semicircle, Anti- displacement location ring, O-ring seal, from Beijing plus day and the design of development in science and technology Co., Ltd, the product for producing and selling.

Described steel oil pipe, stretching resistance strong fiber band, seamless steel pipe or glass reinforced plastic pipe, category prior art can consigned processing Production.

The selection of above material, only it is enumerating in embodiment, other similar products are also the option of this patent, are retouched It is only section Example rather than whole to state embodiment, and those of ordinary skill in the art are not before creative work is made The every other embodiment obtained is put, belongs to the protection domain of this patent.

Claims (7)

1. a kind of inner liner abrasive resistant, wrapping up in heat-insulation and heat-preservation composite oil pipe outside, the both ends of the oil pipe are to be machined with externally threaded thread segment, Part close to both ends thread segments is two lever pieces, and the part between two lever pieces is interlude, by oil between oil pipe and oil pipe Pipe box cupling links up oil pipe use of going into the well；Characterized in that, one inner tube of fixed setting-in (2) is made in described oil pipe (1) For anticorrosion antiwear layer in oil pipe, the length of inner tube (2) is more than oil pipe (1), and the both ends of the surface protrusion of inner tube is in oil pipe (1) end end face Outside；One layer of insulating (3) is equably wrapped up in the oil pipe (1) interlude oil-pipe external wall, in insulating (3) Outside equably overlaps winding insulating sizing protection band (4), will wrap up on the outside of oil pipe interlude insulating and After thermal insulation layer sizing protection band, it is penetrated in the lump in heat-insulation and heat-preservation oil pipe the outer protection tube (5)；Among the oil pipe (1) Section both ends are provided with anti-displacement forced seal device, and anti-displacement forced seal device is directly sleeved on oil pipe (1) by adjacent respectively On fixed steelring (6), anti-displacement location ring (7), O-ring seal (8) and the outer protection tube (5) be forced compression after formed The reducer for having constant slope constitutes jointly；At described oil pipe connection box cupling (13) and lever piece, its periphery, which is fixed with, to be carried The heat-insulated shell of semicircle (10) of preceding prefabricated two docking with reinforcement, in the heat-insulated shell of semicircle (10) on pair of two docking Title be provided with some groups of shell fastening screws (11), two docking the heat-insulated shell reinforcement of semicircle gap in be filled with every Hot material (12), the heat-insulated shell of semicircle of two docking is sprayed after heat-barrier material is filled with along the inner surface and both ends of the surface of semicircle Fluid sealant (14) is applied；In the end of described oil pipe (1) interlude and two heat-insulated shells of the semicircle docked at lever piece (10) trapezoidal O-ring seal (9) is provided between end.

2. a kind of inner liner abrasive resistant according to claim 1, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that in described It is thermoplastic high density's polyethylene compound pipe or superhigh molecular polyethylene compound pipe to manage (2), passes through the end socket of inner tube both ends of the surface And interior tubular elastic recovers function, inner tube is firmly fastened in oil pipe.

3. a kind of inner liner abrasive resistant according to claim 1, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that will be incubated Material sleeve mounted in a waterproof, every, into being integral, being then uniformly wrapped in oil pipe (1) in the adiabatic bagging (15) of radiant heat Between section oil pipe on the outside of, form described insulating (3)；The outside of insulating (3) uniformly overlap joint be wound with by Thermal insulation layer is close to the sizing protection band (4) tightly wrapped, and sizing protection band (4) is from the strong fiber band of stretching resistance；Protection band of shaping (4) Outside be thermal insulation protection oil pipe the outer protection tube (5), the outer protection tube (5) is from seamless steel pipe, glass reinforced plastic pipe or other high Intensity holds the making of external pressure material.

4. a kind of inner liner abrasive resistant according to claim 3, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that the guarantor Adiabator selects aeroge nano super heat-insulation and heat-preservation felt.

5. a kind of inner liner abrasive resistant according to claim 1, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that described Oil pipe (1) interlude both ends are provided with anti-displacement forced seal device, and the device is that fixed steelring (6) is welded on outside oil pipe On the setting position of wall, then fixed steelring will be sleeved on the anti-displacement location ring (7) of enhancing nylon making, O-ring seal (8) (6) outside, finally the outer protection tube (5) outermost end by hydraulic test by this at the outer protection tube (5) and sealing Cushion rubber (8) is by thicker external diameter, and pressure is compressed to thinner external diameter, to have formd constant slope in the end of oil pipe interlude Pressure withhold sealing the outer protection tube reducer.

6. a kind of inner liner abrasive resistant according to claim 1, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that be fixed on The heat-insulated shell of semicircle (10) of two docking in tubing coupling and lever piece is to pass through Shooting Technique from enhancing nylon material It is made；Multigroup reinforcement is provided with shell；Heat-barrier material is filled with gap between reinforcement；In two semicircles The inner surface and both ends of the surface of heat-insulated shell coat one layer of fluid sealant.

7. a kind of inner liner abrasive resistant according to claim 1, heat-insulation and heat-preservation composite oil pipe is wrapped up in outside, it is characterised in that in oil pipe (1) trapezoidal fluid sealant is provided between the end of intermediate ends and the end of two heat-insulated shells of the semicircle docked (10) at lever piece Enclose (9), trapezoidal O-ring seal (9) is made from nitrile rubber material.