CN206071491U - Oil pipe spraycan - Google Patents

Abstract

The utility model discloses a kind of oil pipe spraycan, belongs to coiled tubing measure technical field of operation.The oil pipe spraycan includes：Union joint, rotation core bar and leggy spray gun；The union joint is the tubing string for being provided with first through hole, the rotation core bar is the tubing string for being provided with the second through hole, the leggy spray gun is the tubing string for being provided with third through-hole, and at least one spray-hole is provided with the side wall of the leggy spray gun, and at least one spray-hole is connected with second through hole；One end of the union joint is connected with one end of the rotation core bar, and the first through hole is connected with second through hole, and the other end of the rotation core bar is socketed in the third through-hole of the leggy spray gun.Solve that oil pipe spraying operation process is loaded down with trivial details, the serious problem for reducing efficiency of construction；Reach and simplified oil pipe spraying operation, improved the effect of oil pipe spraying operation efficiency of construction.

Description

Oil pipe spraycan

Technical field

This utility model is related to coiled tubing measure technical field of operation, more particularly to a kind of oil pipe spraycan.

Background technology

Conventional oil pipe spraycan includes leggy spray gun, exchangeable nozzle leggy spray gun and rotary spray gun, each Oil pipe spraycan can complete different oil pipe spraying operations.Wherein, leggy spray gun can large area cover tube wall, fit Close oil pipe stain eliminating operation；Exchangeable nozzle leggy spray gun is by blocking unwanted eyelet or changing the nozzle of different pore size The different oil pipe spraying operations of row, such as sand washing, for slurry or gaslift；Rotary spray gun can carry out rotary-jet erosion tube wall, institute Sandblasting cutting is adapted to rotary spray gun.

When down-hole needs to be carried out continuously different oil pipe spraying operations, the oil pipe spraying operation for carrying out as needed is selected in advance Different oil pipe spraycans are selected, the first oil pipe spraycan for selecting is tightened with oil pipe connector, then by the first oil pipe Entering under spraycan carries out oil pipe spraying operation in, after the first oil pipe spraycan completes oil pipe spraying operation, by first Oil pipe spraycan acts well, and unloads from oil pipe connector；Then the second oil pipe spraycan for selecting and oil pipe are connected Connect device to tighten, then by the second oil pipe spraycan G.I.H, carry out oil pipe spraying operation, in this way until completing Oil pipe spraying operation.

During oil pipe spraying operation is realized by above-mentioned oil pipe spraycan, inventor has found prior art at least There is following defect：When down-hole needs to be carried out continuously oil pipe spraying operation, complete in an oil pipe spraying operation, and by oil pipe After spraycan goes out from down-hole, it is necessary to the oil pipe spraycan is unloaded from oil pipe connector, could be by another oil pipe Spraycan is tightened on oil pipe connector, then carries out next oil pipe spraying operation again, and operation process is loaded down with trivial details, serious to reduce Efficiency of construction.

Utility model content

It is loaded down with trivial details in order to solve oil pipe course of injection present in correlation technique, it is serious to reduce efficiency of construction problem, this practicality A kind of oil pipe spraycan of new offer, the oil pipe spraycan include：Union joint, rotation core bar and leggy spray gun；

The union joint is the tubing string for being provided with first through hole, and the rotation core bar is the tubing string for being provided with the second through hole, described Leggy spray gun is the tubing string for being provided with third through-hole, and at least one spray-hole, institute are provided with the side wall of the leggy spray gun State at least one spray-hole to connect with second through hole；

One end of the union joint is connected with one end of the rotation core bar, the first through hole and the second through hole phase Connection, the other end of the rotation core bar are socketed in the third through-hole of the leggy spray gun.

Optionally, the oil pipe spraycan also includes nozzle, and the nozzle is the cylinder for being provided with fourth hole, described the Diameter of the diameter of four through holes less than the first through hole, second through hole and the third through-hole, the nozzle are built in In at least one spray-hole.

Optionally, the oil pipe spraycan also include seal, the seal be hollow cylinder, the seal The outside of one end of the rotation core bar is socketed in, while the seal is also socketed in the outside of one end of the union joint.

Optionally, the oil pipe spraycan also includes the first thrust bearing, and first thrust bearing is centripetal thrust force Bearing, first thrust bearing are arranged on the outside of one end of the rotation core bar.

Optionally, the outer wall of one end of the rotation core bar is provided with first step, and the seal near the rotation Blind plate is formed at the position of one end of core bar, and the blind plate is more than described first to the distance of the bottom surface of the rotation core bar Distance of the step to the bottom surface of the rotation core bar；The oil pipe spraycan also includes the second thrust bearing, and described second pushes away Power bearing is arranged between the first step and the blind plate, it is described rotation core bar bottom surface for it is described rotation core bar with it is described The face of one end of union joint connection.

Optionally, it is provided with spacing ring between the seal and the union joint, on the seal and the union joint It is provided with least one spacing hole corresponding with the spacing ring.

Optionally, the bottom surface of the rotation core bar is provided with counterbore, and one end of the union joint is deep in the counterbore, institute The bottom surface for stating rotation core bar is the face of one end that the rotation core bar is connected with the union joint.

Optionally, the outer wall of one end of the union joint is provided with second step, the bottom surface of the rotation core bar and described Two steps are contacted, and the bottom surface of the rotation core bar is the face of one end that the rotation core bar is connected with the union joint.

Optionally, the outer wall of the union joint is provided with the 3rd step, and the 3rd step is in away from the union joint At end；The bottom surface of the seal is contacted with the 3rd step, and the bottom surface of the seal is the seal near institute State the bottom surface of one end of union joint.

Optionally, rotation core bar and the union joint is sealed by the first seal groove, it is described rotate core bar with it is described Leggy spray gun is sealed by the second seal groove.

The technical scheme that embodiment of the present utility model is provided can include following beneficial effect：

The oil pipe spraycan provided in this utility model embodiment includes union joint, rotation core bar and leggy spray gun, At least one spray-hole is set on leggy spray gun, and each spray-hole that at least one spray-hole includes is arranged on leggy spray gun The various location of outer wall, according to different oil pipe spraying operations, can be with the different spray-hole of instantaneously changing, to save oil pipe spray The multiple installation and removal of instrument are penetrated, the convenience and efficiency of construction of oil pipe spraying operation is improve.

It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary, this can not be limited Utility model.

Description of the drawings

During accompanying drawing herein is merged in description and the part of this specification is constituted, show and meet of the present utility model Embodiment, and be used for together explaining principle of the present utility model in description.

Fig. 1 is a kind of schematic diagram of the oil pipe spraycan 100 according to an exemplary embodiment；

Fig. 2 is a kind of schematic diagram of the oil pipe spraycan 100 for implementing to exemplify according to another exemplary；

Fig. 3 is a kind of cross-sectional view of the oil pipe spraycan 100 according to an exemplary embodiment.

Specific embodiment

Here in detail exemplary embodiment will be illustrated, its example is illustrated in the accompanying drawings.Explained below is related to During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with this utility model.Conversely, they be only with such as Consistent example in terms of being described in detail in appended claims, more of the present utility model.

Fig. 1 is a kind of schematic diagram of the oil pipe spraycan 100 according to an exemplary embodiment, as shown in figure 1, should Oil pipe spraycan 100 can include：Union joint 1, rotation core bar 2 and leggy spray gun 3；

Union joint 1 is the tubing string for being provided with first through hole 11, rotates core bar 2 to be provided with the tubing string of the second through hole 21, leggy Spray gun 3 (is not marked in figure, is used for the logical of the accommodating other end 23 for rotating core bar 2 in specifically Fig. 1 to be provided with third through-hole 31 Hole) tubing string, be provided with least one spray-hole 32 on the side wall of leggy spray gun 3, at least one spray-hole 32 and second is logical Hole 21 connects；

Optionally, first through hole 11, the second through hole 21 are identical with the internal diameter size of third through-hole 31.

Optionally, union joint 1, rotation core bar 2 are identical with the external diameter size of leggy spray gun 3, and external diameter is less.Work as connection 1, when the external diameter of rotation core bar 2 and leggy spray gun 3 is less, the overall volume of oil pipe spraycan 100 is less, therefore oil pipe Spraycan 100 not only easily constructed by small holes instrument, and returns that to splash injury little.Exemplary, union joint 1, rotary core The external diameter of bar 2 and leggy spray gun 3 can be 38 millimeters.

One end 12 of union joint 1 is connected with one end 22 of rotation core bar 2, and first through hole 11 is connected with the second through hole 21, The other end 23 of rotation core bar 2 is socketed in the third through-hole 31 of leggy spray gun 3.

The oil pipe spraycan that this utility model embodiment is provided only includes union joint, rotation core bar and leggy spray gun three Part, simple structure.When oil pipe spraying operation is carried out using oil pipe spraycan 100, first by the other end 13 of union joint 1 It is connected with operation tubing, then by whole 100 G.I.H of oil pipe spraycan；Then suppressed power fluid by the outer pump truck of well Body passes through first through hole 11 and the second through hole 21 is transported to leggy spray gun 3, by one or several at least one spray-hole 32 Individual spray-hole is projected, so that it may complete oil pipe spraying operation (such as scale removal), when needing to carry out next oil pipe spraying operation (such as Sand washing) when, it is only necessary to other that the spray-hole for injection is replaced by least one spray-hole 32 are one or several, you can Next oil pipe spraying operation is carried out, is sprayed without another oil pipe will be installed again after current oil pipe spraycan dismounting Instrument, so oil pipe spraycan 100 is quick for installation, easy construction.

Optionally, referring to Fig. 2, Fig. 2 is that a kind of oil pipe spraycan 100 for implementing to exemplify according to another exemplary shows It is intended to.As shown in Fig. 2 being threadedly coupled by the first screw thread 44 between rotation core bar 2 and leggy spray gun 3.Optionally, the first spiral shell Stricture of vagina 44 can be love gram box thread, (English full name：ACME Trapezoidal Thread, English abbreviation：ACME) screw thread, ACME screw threads have the effect of transmitting torque, ensure that rotation core bar 2 and 3 fixation of leggy spray gun.

Optionally, referring also to Fig. 2, restraining position ring block 42, and and spacing ring are set between rotation core bar 2 and leggy spray gun 3 42 at least one corresponding spacing holes 43, at least one spacing hole 43 can include default horizontal along oil pipe spraycan 100 To 3 spacing holes of (axis direction of vertical oil pipe spraycan 100) circumference trisection distribution, certain at least one spacing hole 43 can also include other number spacing holes, and this utility model embodiment is without limitation.In addition, by boat nail (can be Six boat nails) or screw passes through at least one spacing hole 43 and tightens, to ensure that rotating core bar 2 is not shaken with leggy spray gun 3 It is dynamic, so as to prevent from rotating core bar 2 with the generation back-off phenomenon of leggy spray gun 3.

Optionally, referring also to Fig. 2, fluted 28 at the surface of the inwall for rotating one end 22 of core bar 2, are arranged, groove 28 is used In when rotation core bar 2 is installed, installation personnel can rotate core bar 2 by 28 taking and placing of groove.

Optionally, the other end 13 of union joint 1 is provided with female thread 16.Female thread 16 is for the external screw thread with operation tubing Connection, so as to oil pipe spraycan 100 is connected with oil pipe, and then can be by 100 G.I.H of oil pipe spraycan.It is optional , female thread 16 can be minor diameter tubing screw thread (English full name：American Mining Macaroni Tubing, English Referred to as：AMMT), AMMT screw threads have the effect of transmitting torque, can protect union joint 1 and be connected firmly with operation tubing.

In addition, it is necessary to illustrate, at least one spray-hole 32 can be positioned at different angles in leggy spray gun 3 On the diverse location of side wall.When oil pipe spraying operation is carried out, suitable spray can be selected according to different oil pipe spraying operations Suitable spray-hole is opened by perforation immediately, inappropriate spray-hole closure, to carry out oil pipe spraying operation, so as to eliminate When needing to be carried out continuously oil pipe spraying operation, the process of oil pipe spraycan is changed, so as to improve applying for oil pipe spraying operation Work efficiency rate.

Exemplary, at least one spray-hole 32 includes three groups of spray-holes, respectively first group spray-hole, second group of injection Hole and the 3rd group of spray-hole, first group of spray-hole are included in transversely eccentered circumference trisection distribution on the side wall of leggy spray gun 3 Three spray-holes, can be used for scale removal, for slurry or gaslift；Second group of spray-hole is included on the side wall of leggy spray gun 3 to rotation The direction of one end 22 of core bar 2 inclines three spray-holes of predetermined angle off-centre operation week trisection distribution, can be used for sand washing, replaces Slurry or gaslift；3rd group of spray-hole includes perforation hole of second through hole 21 at the direction of one end 22 of rotation core bar 2, can be used for Sand washing, for slurry or gaslift.So when needing to be carried out continuously oil pipe spraying operation, can only change spray according to oil pipe spraying operation Perforation, and oil pipe spraycan replacing is not carried out, so as to save the Renewal process of oil pipe spraycan, and then improve oil pipe injection The efficiency of construction of operation.

In addition, first group of spray-hole and second group of spray-hole include multiple spray-holes, so in spraying operation, it is multiple Spray-hole can be used simultaneously, to improve the efficiency of sandblasting operation.

In addition, in oil pipe spraying operation, the screw thread that the spray-hole not used at least one spray-hole 32 can pass through Post is blocked；Optionally, threaded post can be taper pipe thread (English full name：National(American)Pipe Thread, referred to as:NPT), NPT threaded posts come with sealing and the effect locked, so as to improve the efficiency of oil pipe spraying operation.

Optionally, referring also to Fig. 2, oil pipe spraycan 100 also includes nozzle 4, and nozzle 4 is the circle for being provided with fourth hole 41 Post, the diameter of the diameter of fourth hole 41 less than first through hole 11, the second through hole 21 and third through-hole 31, nozzle 41 be built in In a few spray-hole 32.

Wherein, as nozzle 41 is built at least one spray-hole 32, so power liquid is finally projected from nozzle 41, Again as the diameter of fourth hole 41 is less than the diameter of first through hole 11, the second through hole 21 and third through-hole 31, so working as power When liquid enters into fourth hole 41 from the second through hole 21, fourth hole 41 has throttling action, so that working as power fluid Body from nozzle 41 project when, the flow velocity of power liquid is greatly improved, and produces high-speed jet, as high-speed jet is compared to general stream The jet of speed is bigger to the impulsive force of oil pipe, so the effect of oil pipe spraying operation is more preferable.

Optionally, the outer face of nozzle 41 is provided with the stuck point of default Circlip tongs, so that being tightened using Circlip tongs During nozzle 41, Circlip tongs are extend into into stuck point, Circlip tongs are transported with convenient construction personnel, so as to nozzle 41 is tightened.In addition, card The stuck point of spring pincers can be the counterbore arranged in the outer face of nozzle 41.The number of the stuck point of default Circlip tongs can be 4, Certainly the number of the stuck point of Circlip tongs can also be other numbers, and this utility model embodiment is without limitation.Nozzle 41 Outer face be the axle center away from oil pipe spraycan 100 end face.

Optionally, referring to Fig. 3, Fig. 3 is a kind of the transversal of the oil pipe spraycan 100 according to an exemplary embodiment Face figure.As shown in figure 3, in Fig. 3 black round dot the axis 101 for oil pipe spraycan 100, at least one spray-hole 32 is eccentric Circular shaft is distributed, and eccentric circular shaft refers to that the axis 102 of at least one spray-hole 32 is no with the axis 101 of oil pipe spraycan 100 and hands over Point.Due to the eccentric circular shaft distribution of at least one spray-hole 32, so the also eccentric circle distribution of nozzle 41, thus when power liquid from When nozzle 41 is projected and produces high-speed jet, at least one spray-hole 32 can produce eccentric jet；Additionally, due to eccentric jet meeting Propulsive thrust is produced, propulsive thrust is acted on leggy spray gun 3, drive leggy spray gun 3 to rotate, due to leggy spray gun 3 and rotation Core bar 2 connects, so rotation core bar 2 is also driven to rotate, when rotating core bar 2 and rotating, oil pipe spraycan 100 can be with For completing the oil pipe spraying operations such as sandblasting cutting.

In addition, when the rotation of core bar 2 is rotated, the jet area coverage that not only nozzle 41 is projected increases big, can be comprehensive complete Scale removal in Cheng Jing, sand washing, for oil pipe spraying operations such as slurry, gaslift or sandblasting cuttings, and rotate the rotation of core bar 2 and can produce whirlpool Stream, vortex can be improved in well takes sand and fluid-carrying capability, so as to improve the working performance of oil pipe injection.

Optionally, nozzle 41 can be connected by NPT screw threads with least one spray-hole 32.

Optionally, referring also to Fig. 2, oil pipe spraycan 100 also includes seal 5, and seal 5 is hollow cylinder, close Envelope body 5 is socketed in the outside of one end 22 of rotation core bar 2, while seal 5 is also socketed in the outside of one end 12 of union joint 1； Seal 5 is used for firm rotation core bar 2 and union joint 1, to prevent core bar 2 is rotated in oil pipe 100 operation of spraycan and connect Joint 1 is rocked；Due to preventing rotation core bar 2 and union joint 1 to rock so that oil pipe spraycan 100 can stablize operation, from And improve 100 efficiency of construction of oil pipe spraycan.

Optionally, seal 5 is threadedly coupled by the second screw thread 17 with rotation core bar 2.In addition, the second screw thread 17 can be ACME screw threads.

Optionally, referring also to Fig. 2, oil pipe spraycan 100 also include the first thrust bearing 6, the first thrust bearing 6 be to Heart thrust bearing, the first thrust bearing 6 are arranged on the outside of one end 22 of rotation core bar 2.First thrust bearing 6 is used for firm rotation Core bar 2, to ensure rotation 2 concentric rotation of core bar.

Optionally, referring also to Fig. 2, the outer wall for rotating one end 22 of core bar 2 is provided with first step 24, and seal 5 is being leaned on Blind plate 25 is formed at the position of one end 22 of nearly rotation core bar 2, and blind plate 25 is more than first to the distance of the bottom surface of rotation core bar 2 Distance of the step 24 to the bottom surface of rotation core bar 2；In addition, oil pipe spraycan 100 also includes the second thrust bearing 7, second pushes away Power bearing 7 is arranged between first step 24 and blind plate 25, and the bottom surface for rotating core bar 2 is that rotation core bar 2 is connected with union joint 1 The face of one end 13.Second thrust bearing 7 is used to reduce the friction between rotation core bar 2 and seal 5, and limits rotation core bar 2 eccentric wear seals 5 and blind plate 25.

Optionally, referring also to Fig. 2, first step 24 is being also provided with the 4th at one end 22 of rotation core bar 2 Step 26, the step surface of the 4th step 26 is towards the one end 22 for rotating core bar 2.The cavity that 4th step is formed with seal 5, should Cavity is used to house the first thrust bearing 7.

Optionally, referring also to Fig. 2, exist between first step 24 and the projection and seal 5 of the formation of the 4th step 26 pre- If the gap of width, to reduce the friction between rotation core bar 2 and seal 5.Predetermined width can be 0.3 millimeter, certainly, in advance If width can also be default other numerical value, this utility model embodiment is without limitation.

Optionally, referring also to Fig. 2, spacing ring 51 between seal 5 and union joint 1, is provided with, and it is corresponding with spacing ring 51 At least one spacing hole 52.At least one spacing hole 52 can include default third along 100 lateral circumferential of oil pipe spraycan 3 spacing holes of distribution, certain at least one spacing hole 52 can also include other number spacing holes, this utility model reality Apply example without limitation.In addition, boat nail (can be interior six boat nail) or screw are passed through at least one spacing hole 52 simultaneously Tighten, to ensure that seal 5 and union joint 1 are not rocked, so as to when preventing from rotating the rotation of core bar 2, seal 5 is produced with union joint 1 Back-off phenomenon.

Optionally, referring also to Fig. 2, the bottom surface for rotating core bar 2 is provided with counterbore 27, and one end 12 of union joint 1 extend into counterbore In 27 so that rotation core bar 2 is more firm with the connection of union joint 1.In addition, rotation core bar 2 can be connected for screw thread with union joint 1 Connect.

Optionally, referring also to Fig. 2, the outer wall of one end 12 of union joint 1 is provided with second step 14, rotates the bottom surface of core bar 2 Contact with second step 14, so that rotation core bar 2 is more consolidated, so as to increase the fastness of oil pipe spraycan 100.

Optionally, referring also to Fig. 2, the outer wall of union joint 1 is additionally provided with the 3rd step 15, and the 3rd step 15 is away from union joint At 1 one end 12；The bottom surface of seal 5 is contacted with the 3rd step 15, so that seal 5 is more consolidated, so as to increase oil pipe The fastness of spraycan 100.The bottom surface of seal 5 is bottom surface of the seal 5 near one end 12 of union joint 1.

In addition, optional, referring also to Fig. 2, rotation core bar 2 can be sealed by the first seal groove a with union joint 1, to protect Sealing between card rotation core bar 2 and union joint 1；Rotation core bar 2 is sealed by the second seal groove b with leggy spray gun 3, with Ensure the sealing between rotation core bar 2 and leggy spray gun 3；Seal 5 can be close by the 3rd seal groove c with union joint 1 Envelope, to ensure the sealing between seal 5 and union joint 1.Using the first seal groove a, the second seal groove b and the 3rd seal groove After c is sealed, it is ensured that the sealing between first through hole 11, the second through hole 21 and third through-hole 31, so as to ensure The pressure of the power liquid in one through hole 11 and the second through hole 21, so as to ensure that oil pipe spraying operation is smoothed out.

In sum, the oil pipe spraycan for providing in this utility model embodiment includes union joint, rotates core bar and many Phase place spray gun, arranges at least one spray-hole on leggy spray gun, and each spray-hole that at least one spray-hole includes is arranged on The various location of leggy spray gun outer wall, according to different oil pipe spraying operations, can with the different spray-hole of instantaneously changing, from And the process for repeatedly mounting and dismounting oil pipe spraycan is saved, the convenience of oil pipe spraying operation is improve, and then is improve The efficiency of construction of oil pipe spraying operation.In addition, the oil pipe spraycan provided in this utility model embodiment also includes nozzle, spray The diameter of the through hole of mouth, is penetrated so that nozzle has throttling action so as to improve less than the diameter of the through hole of rotation core bar The flow velocity of stream, and then also improve the efficiency of construction of oil pipe spraying operation.In addition, the oil pipe provided in this utility model embodiment Spraycan also includes radial thrust bearing, and radial thrust bearing is used for firm rotation core bar, concentric to ensure rotation core bar Rotate, and then ensure that pipe inspection operation is smoothed out.

Those skilled in the art will readily occur to this utility model after considering description and putting into practice invention disclosed herein Other embodiments.The application is intended to any modification of the present utility model, purposes or adaptations, these changes Type, purposes or adaptations follow general principle of the present utility model and including the undocumented this technology of this utility model Common knowledge or conventional techniques in field.Description and embodiments be considered only as it is exemplary, it is of the present utility model true Positive scope is pointed out by claim.

It should be appreciated that this utility model is not limited to the accurate knot for being described above and being shown in the drawings Structure, and various modifications and changes can be being carried out without departing from the scope.Scope of the present utility model only will by appended right Ask to limit.

Claims (10)

1. a kind of oil pipe spraycan, it is characterised in that the oil pipe spraycan includes：Union joint, rotation core bar and multiphase Position spray gun；

The union joint is the tubing string for being provided with first through hole, and the rotation core bar is the tubing string for being provided with the second through hole, the multiphase Position spray gun is the tubing string for being provided with third through-hole, is provided with least one spray-hole on the side wall of the leggy spray gun, it is described extremely A few spray-hole is connected with second through hole；

One end of the union joint is connected with one end of the rotation core bar, and the first through hole is connected with second through hole Logical, the other end of the rotation core bar is socketed in the third through-hole of the leggy spray gun.

2. oil pipe spraycan according to claim 1, it is characterised in that the oil pipe spraycan also includes nozzle, The nozzle is the cylinder for being provided with fourth hole, and the diameter of the fourth hole is less than the first through hole, second through hole With the diameter of the third through-hole, the nozzle is built at least one spray-hole.

3. oil pipe spraycan according to claim 1, it is characterised in that the oil pipe spraycan also includes sealing Body, the seal are hollow cylinder, and the seal is socketed in the outside of one end of the rotation core bar, while described close Envelope body is also socketed in the outside of one end of the union joint.

4. oil pipe spraycan according to claim 1, it is characterised in that the oil pipe spraycan is also pushed away including first Power bearing, first thrust bearing be radial thrust bearing, first thrust bearing be arranged on it is described rotation core bar one The outside at end.

5. oil pipe spraycan according to claim 3, it is characterised in that the outer wall of one end of the rotation core bar is provided with First step, and the seal forms blind plate at the position near one end of the rotation core bar, and the blind plate is to institute The distance for stating the bottom surface of rotation core bar is more than the first step to the distance of the bottom surface of the rotation core bar；The oil pipe injection Instrument also includes the second thrust bearing, and second thrust bearing is arranged between the first step and the blind plate, described The bottom surface of rotation core bar is the face of one end that the rotation core bar is connected with the union joint.

6. oil pipe spraycan according to claim 3, it is characterised in that set between the seal and the union joint Restraining position ring block, the seal with least one spacing hole corresponding with the spacing ring is provided with the union joint.

7. oil pipe spraycan according to claim 1, it is characterised in that the bottom surface of the rotation core bar is provided with counterbore, One end of the union joint is deep in the counterbore, and the bottom surface of the rotation core bar is the rotation core bar and the union joint The face of one end of connection.

8. oil pipe spraycan according to claim 1, it is characterised in that the outer wall of one end of the union joint is provided with Two steps, the bottom surface of the rotation core bar are contacted with the second step, and the bottom surface of the rotation core bar is the rotation core bar The face of the one end being connected with the union joint.

9. oil pipe spraycan according to claim 3, it is characterised in that the outer wall of the union joint is provided with the 3rd Rank, the 3rd step is in the end away from the union joint；The bottom surface of the seal is contacted with the 3rd step, institute The bottom surface for stating seal is bottom surface of the seal near one end of the union joint.

10. oil pipe spraycan according to claim 1, it is characterised in that the rotation core bar is logical with the union joint The sealing of the first seal groove is crossed, the rotation core bar is sealed by the second seal groove with the leggy spray gun.