CN209212173U - Coiled tubing connector - Google Patents
Coiled tubing connector Download PDFInfo
- Publication number
- CN209212173U CN209212173U CN201821928524.7U CN201821928524U CN209212173U CN 209212173 U CN209212173 U CN 209212173U CN 201821928524 U CN201821928524 U CN 201821928524U CN 209212173 U CN209212173 U CN 209212173U
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- CN
- China
- Prior art keywords
- lock sleeve
- coiled tubing
- upper lock
- transition joint
- slips
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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- 238000011161 development Methods 0.000 abstract description 3
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- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 125000004122 cyclic group Chemical group 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000018109 developmental process Effects 0.000 description 2
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- 230000003247 decreasing effect Effects 0.000 description 1
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Abstract
The utility model belongs to oil-gas field development field, and in particular, to a kind of coiled tubing connector specifically includes lock sleeve assembly on coiled tubing, lock sleeve assembly under transition joint assembly and coiled tubing；The end face of transition joint assembly left and right ends is close to the inner wall of lock sleeve assembly under lock sleeve assembly and coiled tubing on coiled tubing, and is connected through a screw thread, and lock sleeve assembly is connected by screw thread with transition joint assembly under coiled tubing.Coiled tubing connector provided by the utility model can solve coiled tubing on two or can not carry out the problem of rotating upper button and shackle when roller coiled tubing is connect with underground continuous oil pipe, because coiled tubing is unable to relative rotation, lock sleeve assembly lock sleeve assembly and coiled tubing under is connected through a screw thread on coiled tubing after upper button simultaneously, realize torque delivery function, practicability is good, easy for installation.
Description
Technical field
The utility model belongs to Oil-Gas Well Engineering equipment technical field, more specifically, is related to a kind of coiled tubing connection
Device is connected for the upper button of coiled tubing and coiled tubing, especially in the depth for needing to transmit big axial tension and circumferential torque
The underground work such as well and ultradeep well coiled tubing drilling, are limited by highway transportation height, coiled tubing length on single roller
Cannot be too long, when to deep-well and ultradeep well continuous oil pipe operation, multiple roller coiled tubings need to be connected, realize continuous oil
The transmitting of big pulling force and large torque between pipe and coiled tubing；Simultaneously because coiled tubing winds flecition on roller,
The fluid secondary vortex flow easy to form for leading to flow through hydrophthalmia in coiled tubing, to substantially increase on roller in coiled tubing
Hydrophthalmia fluid circulation pressure consumption, therefore from the angle for reducing roller cyclic pressure dissipation, need the long coiled tubing of single roller to be substituted for more
The short coiled tubing of a roller carries out underground work, achievees the purpose that ground roller cyclic pressure dissipation is effectively reduced；In addition, on roller
The coiled tubing of (or underground) cannot rotate, and the connection between coiled tubing and coiled tubing usually requires to rotate button ability
Realize connection, it is therefore desirable to which special connector can just be met the requirements；This connector is locked using additional slips and spring compression,
Button connection is realized using slider mechanism, to make drilling well, complete well, the well logging, well workover of coiled tubing completion deep-well and ultradeep well
It is possibly realized etc. a variety of underground work.
Background technique
Since coiled tubing purposes is very extensive: can be used to clean pipeline, rinse sand plug, wax removal, selective acidizing, gaslift
It asks production, squeeze method closure, kill-job, underbalance perforating, well testing, displacement drilling fluid, high-angle borehole logging, horizontal wellbore logging, complete well, beat
Fish out, remove set expansion type divider, bore plug, grinding fish, it is permanently installed as production pipe, shaft bottom camera shooting, small experience bore
Well, secondary drilling well and intensification drilling well, casing window sidetracking, oil pipe subsidy etc. can carry out horizontal well drilling, cased hole bores
Well, open hole well drilling well are deepened drilling well, slimhole drilling, Microdrilling drilling well, old well window sidetracking, under balance pressure drilling and are repaired
The operations such as well, complete well；Coiled tubing drilling has the characteristics that low cost, low energy consumption, safety and environmental protection, has wide range of applications, can
The difficult development benefit for employing oil-gas reservoir such as old filed, " low pressure, hypotonic, low yield " three low oil-gas reservoirs is improved, especially in China
In terms of the exploration and development of unconventional gas reservoir, tight gas, shale gas and coal bed gas etc., have a wide range of applications.
But there is urgent problems for coiled tubing underground work technology:
The coiled tubing diameter for being generally used for operation is smaller, and hydrophthalmia is smaller in coiled tubing, and significant portion is continuous
Oil pipe is coiled on roller, and in operation process, hydrophthalmia cyclic pressure dissipation is bigger in coiled tubing, especially on roller, because secondary
The influence of vortex, cyclic pressure dissipation is bigger, and big portion's cyclic pressure dissipation consumption seriously affects coiled tubing underground on roller of continuous oil pipe
The distribution of operation water power, this just needs the longer coiled tubing of single roller being divided into the short coiled tubing of multiple rollers successively
It is connected before going into the well, reducing ground is the length for not entering the coiled tubing of well on roller, reduces the water function of ground coiled tubing consumption
Rate, this just needs the connector between special coiled tubing and coiled tubing.
Meanwhile being limited by highway transportation, coiled tubing cannot be too long on single roller, will be required for deep-well and ultradeep well
Long coiled tubing is divided into multiple rollers and transports to well site, and roller coiled tubing of going into the well connects the coiled tubing of a roller again,
It can be only achieved the purpose that underground work is completed with long coiled tubing in this way, it is also desirable between special coiled tubing and coiled tubing
Connector.
In addition, coiled tubing transmitting is axial to draw for coiled tubing deep-well, ultradeep well or drilling well coiled tubing underground work
Power is larger, axial reaction torque is larger, needs special coiled tubing connector that can just meet the requirements.
Coiled tubing connector is also coiled tubing connector, locker (or mechanism, device), connector (or mechanism, dress
Set), grasper (or mechanism, device), rivet tightly device (or mechanism, device) etc., be it is a kind of ground quickly connect coiled tubing with
A kind of fastening means of coiled tubing or downhole tool.
Currently successfully apply close with the Chinese patent of the coiled tubing connector of authorization (or connector or connection anchor etc.)
50, wherein slip-type coiled tubing connector adds taper slips or coiled tubing inner wall to add generally by coiled tubing outer wall
The mode of single side clamping for expanding slips is attached, equally by coiled tubing stress deformation the reason of, slips clamping force is limited,
The torque and tensile stress transmitted after connection is smaller, is also only applicable to the operations such as the little well logging of down-hole string active force, gaslift
The connection of coiled tubing and downhole tool, while most of slip-type connector needs to link closely just around axial-rotation in connection procedure
It is able to achieve slips to be in clamping connection, when coiled tubing is connect with coiled tubing, two connection coiled tubings cannot all rotate, therefore single
Pure slip-type coiled tubing connector is not suitable for the connection operation of coiled tubing and coiled tubing yet.
Scene needs to increase by the way of pressurizeing pulling force and the torsion of coiled tubing connection simultaneously inside and outside coiled tubing
Square, while during connection, the taper slips that links closely by rotation is needed mostly, the large torque and axial direction of external pressurized in realization
The connection of the coiled tubing of pulling force.Currently on the market, coiled tubing connector is individually for rotation connection is provided and is used for deep-well, surpasses
The coiled tubing of deep-well or the big axial tension of drilling well and big circumferential torque meets the device country not yet.
Utility model content
In view of the above problems, the purpose of the utility model is to provide a kind of coiled tubing connectors, keep multiple-roll continuously oily
Pipe segmentation connection carries out deep-well, ultradeep well or the technique of drilling well and is possibly realized.
In order to achieve the above object, the technical solution of design is as follows:
Coiled tubing connector provided by the utility model, comprising: lock sleeve assembly, transition joint assembly on coiled tubing
With lock sleeve assembly under coiled tubing, on coiled tubing under the structure of lock sleeve assembly and coiled tubing lock sleeve assembly structure
Axially and symmetrically, lock sleeve assembly is threaded in transition joint assembly under lock sleeve assembly and coiled tubing and on coiled tubing
Both ends；
Lock sleeve assembly includes upper coiled tubing, upper lock sleeve seal nipple, upper lock sleeve shell, locking on coiled tubing
Sliding taper slips, upper lock sleeve preloading spring and upper lock sleeve coiled tubing in fixed outer fixed taper slips, upper lock sleeve
Anti-skidding slips；Wherein, upper coiled tubing ontology and upper coiled tubing cutting body of the upper coiled tubing by integral structure, upper continuous oil
The bending of coiled tubing ontology, upper lock sleeve seal nipple slide over coiled tubing ontology upwards after the right end of pipe cutting body turns up
On, the both ends of upper lock sleeve shell are threaded in respectively on lock sleeve seal nipple and transition joint assembly, upper lock sleeve
Seal nipple, upper lock sleeve shell, transition joint assembly and upper coiled tubing surround a cavity, fixed taper outside upper lock sleeve
Sliding taper slips, upper lock sleeve preloading spring and the upper other position of lock sleeve coiled tubing antiskid card watt-minute in slips, upper lock sleeve
In in cavity, sliding taper slips is slided on coiled tubing ontology in upper lock sleeve, and conic clamp is slided in upper lock sleeve
Watt right end slide into after upper coiled tubing cutting body bending and in the gap that upper coiled tubing ontology is formed, it is fixed outside upper lock sleeve
Taper slips slides in lock sleeve on sliding taper slips, and the upper anti-skidding slips of lock sleeve coiled tubing is stuck in coiled tubing
Outside after cutting body bending, upper lock sleeve preloading spring both ends hold out against sliding taper slips and upper locking in lock sleeve respectively
Cover the anti-skidding slips of coiled tubing；Transition joint assembly includes transition joint core sealing threaded connector and the rotation of transition joint shell
Adapter, transition joint core sealing threaded connector is located at the inside of transition joint shell rotary joint, and the two screw thread connects
It connects, one end sliding sleeve of transition joint shell rotary joint enters in upper coiled tubing, transition joint shell rotary joint and upper continuous
Oil pipe coaxial.
Furthermore it is preferred that structure be that upper lock sleeve seal nipple is cylindrical structure, and the outer wall of upper lock sleeve seal nipple is remote
One end from transition joint assembly is the conical surface, and one end close to transition joint assembly is machined with what outer diameter was sequentially reduced along axial direction
One, two, three step, the outer diameter of level-one step are the maximum outside diameter of upper lock sleeve seal nipple, are processed in two stage steps outer
Screw thread is machined with three annular seal grooves for mounting O-shaped rings, in the inner wall of upper lock sleeve seal nipple on three-level step
On be machined with six for mounting O-shaped rings annular seal grooves.
Additionally, it is preferred that structure be, upper lock sleeve housing main body be cylindrical structure, the outer diameter of upper lock sleeve housing main body with
The maximum outside diameter of upper lock sleeve seal nipple is identical, be successively machined with along axial direction one on the inner wall of upper lock sleeve housing main body, two,
Three-level step, the internal diameter of two stage steps is less than the internal diameter of level-one step and three-level step, in the level-one of upper lock sleeve housing main body
The internal screw thread matched with the external screw thread in the two stage steps of upper lock sleeve seal nipple is machined on step, outside upper lock sleeve
Internal screw thread is machined on the three-level step of shell main body.
Furthermore preferential structure is, is successively machined with along axial direction one on the outer wall of transition joint shell rotary joint,
Two, three, four, Pyatyi step, the outer diameter of level-one step are identical as the internal diameter of upper coiled tubing；The outer diameter of two stage steps is than level-one platform
The outer diameter of rank is big, be machined in two stage steps matched with the internal screw thread on the three-level step of upper lock sleeve housing main body it is outer
Screw thread；The outer diameter of three-level step is bigger than the outer diameter of two stage steps, is the maximum outside diameter of coiled tubing connector；Outside level Four step
Diameter is identical as the outer diameter of two stage steps, is machined with external screw thread on level Four step；The outer diameter of Pyatyi step is outer with level-one step
Diameter is identical.
Furthermore it is preferred that structure be that fixed taper slips is cylindrical structure, fixed taper outside upper lock sleeve outside upper lock sleeve
The outer diameter of slips is identical as the internal diameter of two stage steps of upper lock sleeve shell, and the inner wall of fixed taper slips is court outside upper lock sleeve
The circular conical surface that the direction internal diameter of transition joint assembly gradually successively decreases, circular conical surface abut upper locking far from one end of transition joint assembly
Cover the end face of the three-level step of seal nipple.
Additionally, it is preferred that structure be that sliding taper slips is cylindrical structure in upper lock sleeve, slide taper in upper lock sleeve
The internal diameter of slips is identical as the outer diameter of upper coiled tubing, slides in upper lock sleeve and is machined on the inner wall of taper slips towards centre
The equally distributed sawtooth in the direction of connector assembly is slided on the outer wall of taper slips in upper lock sleeve towards transition joint assembly side
To one, two, three step is successively machined with, the outer wall of level-one step is that outer diameter is gradually incremental towards the direction of transition joint assembly
Circular conical surface；The outer wall of two stage steps is barrel surface, and upper lock sleeve preloading spring is placed in two stage steps；The outer diameter of three-level step
It is incremented by towards the direction of transition joint assembly is gradually gradually micro-.
Furthermore preferred structure is, the upper anti-skidding slips of lock sleeve coiled tubing is two semicircular rings, two semicircular rings it is outer
Wall is barrel surface, and the outer diameter of two semicircular rings is identical as the internal diameter of upper lock sleeve shell, is processed on the inner wall of two semicircular rings
There is the sawtooth that the direction towards transition joint assembly is gradually successively decreased.
Compared with prior art, coiled tubing connector provided by the utility model can obtain following technical effect:
1, with strong points: the coiled tubing of large torque, big axial tension is needed mainly for deep-well, ultradeep well, drilling well etc.
Connection between coiled tubing；
2, have a wide range of application: cannot be only used for continuous tubing drill well operations, can also be used for deep-well, ultradeep well coiled tubing work
Industry simultaneously can be used for other continuous oil pipe operations such as tension and torque well logging of less demanding, well workover, gas-lift production；
3, structure is simple, easy to operate: the connector both can realize that rotation connected by transition joint shell rotary joint
It connects, and can be locked by transition joint shell rotary joint fixed screw, realize large torque transmitting, structure is simple, not multiple
Miscellaneous process, it is easy to operate.
Detailed description of the invention
By reference to the following description in conjunction with the accompanying drawings and the contents of the claims, and with to the utility model more
Comprehensive understanding, other purposes and result of the utility model will be more clearly understood and understood.
In the accompanying drawings:
Fig. 1 is the half section structure diagram of the coiled tubing connector of the utility model；
Fig. 2 is the schematic diagram of the section structure of the upper coiled tubing of the utility model；
Fig. 3 is the schematic diagram of the section structure of the upper lock sleeve seal nipple of the utility model；
Fig. 4 is the half section structure diagram of the upper lock sleeve shell of the utility model；
Fig. 5 is the half section structure diagram of sliding taper slips in the upper lock sleeve of the utility model；
Fig. 6 is the half section structure diagram of the upper anti-slips of lock sleeve coiled tubing of the utility model；
Fig. 7 is the half section structure diagram of the transition joint assembly of the utility model.
Appended drawing reference therein includes: to connect under 1- coiled tubing top connection assembly, 2- transition joint assembly, 3- coiled tubing
The outer fixed cone of head assembly, the upper coiled tubing of 11-, the upper lock sleeve seal nipple of 12-, the upper lock sleeve shell of 13-, the upper lock sleeve of 14-
Sliding taper slips, the upper lock sleeve preloading spring of 16-, the upper lock sleeve coiled tubing of 17- are anti-skidding in the upper lock sleeve of shape slips, 15-
Under slips, 21- transition joint shell rotary joint, 31- under coiled tubing, 32- under lock sleeve seal nipple, 33- outside lock sleeve
Lock sleeve preloading spring under sliding taper slips, 36- in lock sleeve under fixed taper slips, 35- outside lock sleeve under shell, 34-,
The anti-skidding slips of lock sleeve coiled tubing under 37-.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific embodiment
Below with reference to attached drawing being specifically described in detail to the utility model.
Firstly, it is necessary to explanation, in the description of following the description, term " inner headed face ", " periphery ", " left side ",
The orientation or positional relationship of the instructions such as " right side ", " step ", " from left to right " is that orientation based on the figure or position are closed
System, is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning are necessary
It with specific orientation, is constructed and operated in a specific orientation, should not be understood as the limitation of the utility model.
Fig. 1 shows as according to the half-sectional structure of the coiled tubing connector of the utility model.
As shown in Figure 1, the coiled tubing connector of the utility model, comprising: lock sleeve assembly 1, centre on coiled tubing
Lock sleeve assembly 3 under connector assembly 2 and coiled tubing, 1 spiral shell of lock sleeve assembly on the left end of transition joint assembly 2 and coiled tubing
Line connection, the right end of transition joint assembly 2 are threadedly coupled with lock sleeve assembly 3 under coiled tubing, collectively constitute coiled tubing company
Connect device；Lock sleeve assembly 1 is for connecting coiled tubing 11 on coiled tubing, and lock sleeve assembly 3 is for connecting under coiled tubing
Lower coiled tubing 31.
Fig. 2 is the cross-section structure of the upper coiled tubing of the utility model.
As shown in Fig. 2, upper coiled tubing ontology and upper coiled tubing cutting body two of the upper coiled tubing 11 by integral structure
Part constitute, the end of upper coiled tubing cutting body turn up after upwards coiled tubing ontology bend a distance, it is upper after bending
Gap together is formed between coiled tubing cutting body and upper coiled tubing ontology.
Since the structure of upper coiled tubing 11 is identical as the structure of lower coiled tubing 31, the knot of lower coiled tubing 31
Structure repeats no more.
As shown in Figure 1, lock sleeve assembly 1 includes: upper lock sleeve seal nipple 12, upper lock sleeve shell on coiled tubing
13, the interior sliding taper slips 15 of fixed taper slips 14, upper lock sleeve, upper lock sleeve preloading spring 16 and locking outside upper lock sleeve
The fixed anti-skidding slips 17 of coiled tubing.
Lock sleeve assembly 3 includes: lower lock sleeve seal nipple 32, lower lock sleeve shell 33, lower lock sleeve under coiled tubing
Taper slips 35, lower lock sleeve preloading spring 36, lower lock sleeve coiled tubing are slided in outer fixed taper slips 34, lower lock sleeve
Anti-skidding slips 37.
It can visually see from Fig. 1, lock sleeve assembly 1 and lock sleeve assembly 3 under coiled tubing are same on coiled tubing
Axis, and the structure of the two is axially symmetric, i.e., the structure and the phase of lower lock sleeve seal nipple 32 of upper lock sleeve seal nipple 12
Together, the structure of upper lock sleeve shell 13 is identical as the structure of lower lock sleeve shell 33, fixed taper slips 14 outside upper lock sleeve
Structure is identical as the structure of taper slips 34 fixed outside lower lock sleeve, the structure of sliding taper slips 15 and lower lock in upper lock sleeve
The structure of fixed interior sliding taper slips 35 is identical, the structure of upper lock sleeve preloading spring 16 and lower lock sleeve preloading spring 36
Structure is identical, the structure and the structure phase of the anti-skidding slips 37 of lower lock sleeve coiled tubing of the upper anti-skidding slips 17 of lock sleeve coiled tubing
Together.
The utility model by taking lock sleeve assembly 1 on coiled tubing as an example, to upper lock sleeve seal nipple 12, upper lock sleeve outside
Fixed taper slips 14 outside shell 13, upper lock sleeve, sliding taper slips 15 in upper lock sleeve, upper lock sleeve preloading spring 16 and on
The structure of the anti-skidding slips 17 of lock sleeve coiled tubing is described in detail, lower lock sleeve seal nipple 32, lower lock sleeve shell 33, lower lock
Sliding taper slips 35, lower lock sleeve preloading spring 36, lower lock sleeve are continuous in fixed outer fixed taper slips 34, lower lock sleeve
The structure of the anti-skidding slips 37 of oil pipe can similarly obtain.
Fig. 3 shows the cross-section structure of the upper lock sleeve seal nipple for the utility model.
As shown in figure 3, upper lock sleeve seal nipple 12 generally cylindrical structure, the periphery of cylinder left end is the conical surface, circle
The periphery of cylinder right end is successively machined with one, two, three step that outer diameter gradually successively decreases from left to right, and the middle part of cylinder is level-one
Step, largest outside diameter, for the maximum outside diameter of upper lock sleeve seal nipple 12, the threading in two stage steps, in three-level platform
It is machined with three annular seal grooves on rank, is used for mounting O-shaped rings, the inner headed face of cylinder is machined with six annular seal grooves, is used for
Mounting O-shaped rings.
Fig. 3 combination Fig. 1, upper lock sleeve seal nipple 12 slide on coiled tubing 11.
Fig. 4 shows the half-sectional structure of the upper lock sleeve shell for the utility model.
As shown in figure 4, the main body of upper lock sleeve shell 13 is cylindrical structure, the outer diameter of cylinder and upper lock sleeve seal nipple
12 maximum outside diameter is identical, one, two, three step is successively machined with from left to right in the inner headed face of cylinder, on level-one step
It is machined with internal screw thread, which matches with the external screw thread of the two stage steps of the periphery of locking seal nipple 12, in three-level
Internal screw thread is machined on step.
In conjunction with Fig. 4 and Fig. 1, fixed taper slips 14 generally cylindrical structure, the outer diameter of cylinder and locking outside upper lock sleeve
The internal diameter of the two stage steps of the inner headed face of fixed shell 13 is identical, and the inner headed face of cylinder is the circle that internal diameter gradually successively decreases from left to right
The conical surface, the left end of circular conical surface is against the right side of lock seal nipple 12.
Fig. 5 shows the half-sectional structure of sliding taper slips in the upper lock sleeve of the utility model.
As shown in figure 5, sliding taper slips 15 generally cylindrical structure in upper lock sleeve, the inner structural wall are barrel surface,
Internal diameter is identical as upper 11 outer diameter of coiled tubing, and sliding taper slips inwall processing is uniformly distributed saw to be left small and right large in upper lock sleeve
Dentalation, outer wall are successively machined with one, two, three step from left to right, level-one step be outer wall be outer diameter from left to right by
Gradually incremental circular conical surface；The outer wall of two stage steps is barrel surface, and upper lock sleeve preloading spring 16 is placed above in two stage steps；Three
Outer diameter increases grade step slightly from left to right.
In conjunction with Fig. 1 and Fig. 5, sliding taper slips 15 is placed on coiled tubing 11, the sealing of upper lock sleeve in upper lock sleeve
In the cavity that connector 12, upper lock sleeve shell 13 and transition joint assembly 2 surround, the right side of sliding taper slips 15 in upper lock sleeve
End slides into the gap between the upper coiled tubing cutting body and upper coiled tubing ontology after the bending of upper coiled tubing 11, according to
The sawtooth of sliding 15 inner wall of taper slips increases frictional force to the outer wall of upper coiled tubing 11 in top lock sleeve.
Fig. 6 shows the half-sectional structure of the upper anti-slips of lock sleeve coiled tubing of the utility model.
As shown in fig. 6, the upper anti-skidding slips 17 of lock sleeve coiled tubing is two semicircular rings, two outer walls are barrel surface,
The outer diameter of two semicircular rings is identical as the internal diameter of upper lock sleeve shell 13, and the inner walls of two semicircular rings is that internal diameter is gradually from left to right
Incremental sawtooth, the upper anti-skidding slips 17 of lock sleeve coiled tubing be placed on coiled tubing 11, upper lock sleeve seal nipple 12, on
In the cavity that lock sleeve shell 13 and transition joint assembly 2 surround, it is in the right end of coiled tubing 11, upper coiled tubing 11
The top of upper coiled tubing cutting body bending rear surface；The left side of the upper anti-skidding slips 17 of lock sleeve coiled tubing is pre- by upper lock sleeve
Tight spring 16 is held out against, and the sawtooth on upper anti-skidding 17 inner wall of slips of lock sleeve coiled tubing is that upper coiled tubing 11 applies pressure, is mentioned
For bigger frictional force, prevent the upper coiled tubing cutting body of coiled tubing 11 from slipping.
Fig. 7 shows the half section structure diagram of the transition joint assembly of the utility model.
As shown in fig. 7, transition joint assembly 21 includes transition joint core sealing threaded connector and transition joint shell
Rotary joint 21, transition joint core sealing threaded connector are located at the inside of transition joint shell rotary joint 21, and the two
It is threadedly coupled.
The inner wall of transition joint shell rotary joint 21 is barrel surface, and the internal diameter of transition joint shell rotary joint 21 is to connect
The internal diameter of continuous oil pipe connector, transition joint shell rotary joint 21 and upper coiled tubing 11 are coaxial, revolve in transition joint shell
Successively it is machined with one, two, three, four, Pyatyi step on the outer wall of adapter 21 from left to right, the outer diameter of level-one step and upper continuous
The internal diameter of oil pipe 11 is identical；The outer diameter of two stage steps is bigger than the outer diameter of level-one step, is machined in two stage steps and upper locking
Cover the external screw thread that the internal screw thread on the three-level step of housing main body 13 matches；Outer diameter of the outer diameter of three-level step than two stage steps
It greatly, is the maximum outside diameter of coiled tubing connector；The outer diameter of level Four step and the outer diameter of two stage steps are identical, on level Four step
It is machined with the external screw thread being threadedly coupled with lower lock sleeve shell 33；The outer diameter of Pyatyi step is identical as the outer diameter of level-one step.
Fig. 7 combination Fig. 1, one end sliding sleeve of transition joint shell rotary joint 21 enter in upper coiled tubing 11, transition joint
Shell rotary joint and upper coiled tubing are coaxial.
Above content is described in detail on connection coiled tubing under lock sleeve assembly 1, transition joint assembly 2 and coiled tubing
The specific structure of lock sleeve assembly 3, below will be to lock sleeve assembly 3 under lock sleeve assembly 1, coiled tubing on connection coiled tubing
It makes an explanation with the connection process of transition joint assembly 2.
Step 1: lock sleeve assembly 1 on connection coiled tubing:
(1) upper lock sleeve seal nipple 12 is slided over into suitable position on upper coiled tubing 11, it will be solid outside upper lock sleeve
Determine taper slips 14 and slide over suitable position on coiled tubing 11, is slided over taper slips 15 is slided in upper lock sleeve
Upper locking preloading spring 16 is mounted in the suitable position of upper coiled tubing 11 by suitable position on coiled tubing 11；
(2) by the upper coiled tubing cutting body outward bending of upper 11 end of coiled tubing, taper will be slided in upper lock sleeve
15 right end sliding sleeve of slips enters in the gap between the upper coiled tubing cutting body and coiled tubing ontology of upper 11 end of coiled tubing；
(3) upper lock sleeve coiled tubing 17 two semicircular rings of anti-skidding slips are stuck in the upper company of upper 11 end of coiled tubing
The outside of continuous oil pipe cutting body；
(4) left end of transition joint shell rotary joint 22 is slided in upper coiled tubing 11, by transition joint shell
The internal screw thread of the three-level step of 13 inside of the external screw thread of the two stage steps of 22 left end of rotary joint and upper lock sleeve shell screws company
It connects；
(5) by taper slips 14, upper locking fixed outside upper coiled tubing 11, upper lock sleeve seal nipple 12, upper lock sleeve
Sliding sleeve enters the suitable position of upper lock sleeve shell 13 together for sliding taper slips 15, upper locking preloading spring 16 in set；It will locking
The internal screw thread of the level-one step of 13 inside of the external screw thread of the two stage steps of fixed seal nipple 12 and upper lock sleeve shell screws company
It connects；
Step 2: lock sleeve assembly 3 under connection coiled tubing:
(1) lower lock sleeve seal nipple 32 is slided over into suitable position on lower coiled tubing 31, it will be solid outside lower lock sleeve
Determine taper slips 34 and slide over suitable position on lower coiled tubing 31, is slided over down taper slips 35 is slided in lower lock sleeve
Lower locking preloading spring 36 is mounted in the suitable position of lower coiled tubing 31 by suitable position on coiled tubing 31；
(2) by the upper coiled tubing cutting body outward bending of lower 31 end of coiled tubing, taper will be slided in lower lock sleeve
35 right end sliding sleeve of slips enters in the gap between the upper coiled tubing cutting body and coiled tubing ontology of lower 31 end of coiled tubing；
(3) two semicircular rings of the anti-skidding slips 37 of lower lock sleeve coiled tubing are stuck in the upper of lower 31 end of coiled tubing
The outside of coiled tubing cutting body；
(4) right end of transition joint shell rotary joint 22 is slided in lower coiled tubing 31, by transition joint shell
The internal screw thread of the three-level step of 33 inside of the external screw thread of the two stage steps of 22 right end of rotary joint and lower lock sleeve shell screws company
It connects；
(5) by taper slips 34, lower locking fixed outside lower coiled tubing 31, lower lock sleeve seal nipple 32, lower lock sleeve
Sliding sleeve enters the suitable position of lower lock sleeve shell 33 together for sliding taper slips 35, lower locking preloading spring 36 in set；By lower lock
The internal screw thread of the level-one step of 33 inside of the external screw thread of the two stage steps of fixed seal nipple 32 and lower lock sleeve shell screws company
It connects, is installed.
More than, only specific embodiment of the present utility model, but protection scope of the utility model is not limited thereto,
Anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in variation or replace
It changes, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with claim
Subject to protection scope.
Claims (7)
1. a kind of coiled tubing connector, which is characterized in that including lock sleeve assembly, transition joint assembly and company on coiled tubing
Continue lock sleeve assembly under oil pipe, the structure of lock sleeve assembly and lock sleeve assembly under the coiled tubing on the coiled tubing
Structure is axially symmetric, and lock sleeve assembly is threaded in institute under lock sleeve assembly and the coiled tubing on the coiled tubing
State the both ends of transition joint assembly；Wherein,
Lock sleeve assembly includes upper coiled tubing, upper lock sleeve seal nipple, upper lock sleeve shell, locking on the coiled tubing
Sliding taper slips, upper lock sleeve preloading spring and upper lock sleeve coiled tubing in fixed outer fixed taper slips, upper lock sleeve
Anti-skidding slips；Wherein, the upper coiled tubing by integral structure upper coiled tubing ontology and upper coiled tubing cutting body, it is described
The right end of upper coiled tubing cutting body is bent after turning up to the upper coiled tubing ontology, the upper lock sleeve seal nipple sliding sleeve
On the upper coiled tubing ontology, the both ends of the upper lock sleeve shell are threaded in the upper lock sleeve sealing respectively and connect
On head and the transition joint assembly, the upper lock sleeve seal nipple, the upper lock sleeve shell, the transition joint assembly
A cavity is surrounded with the upper coiled tubing, fixed taper slips outside the upper lock sleeve, sliding cone in the upper lock sleeve
Shape slips, the upper lock sleeve preloading spring and the upper lock sleeve coiled tubing antiskid card watt are located in the cavity,
Sliding taper slips slides on the upper coiled tubing ontology in the upper lock sleeve, and taper slips is slided in upper lock sleeve
Right end slide into the locking after the upper coiled tubing cutting body bending and in the gap that the upper coiled tubing ontology is formed
Fixed outer fixed taper slips slides in the upper lock sleeve on sliding taper slips, and the upper lock sleeve coiled tubing is anti-skidding
Slips is stuck in the outside after the upper coiled tubing cutting body bending, and the upper lock sleeve preloading spring both ends hold out against described respectively
Sliding taper slips and the upper anti-skidding slips of lock sleeve coiled tubing in upper lock sleeve；
The transition joint assembly includes that transition joint core seals threaded connector and transition joint shell rotary joint, described
Transition joint core sealing threaded connector is located at the inside of the transition joint shell rotary joint, and the two is threadedly coupled,
One end sliding sleeve of the transition joint shell rotary joint enters in the upper coiled tubing, the transition joint shell rotary joint
It is coaxial with the upper coiled tubing.
2. coiled tubing connector according to claim 1, which is characterized in that the upper lock sleeve seal nipple is cylinder
Structure, the outer wall of the upper lock sleeve seal nipple is the conical surface far from one end of the transition joint assembly, close to the centre
One end of connector assembly is machined with one, two, three step that outer diameter is sequentially reduced along axial direction, and the outer diameter of level-one step is on described
The maximum outside diameter of lock sleeve seal nipple, the threading in two stage steps are machined with three for pacifying on three-level step
The annular seal groove for filling O-ring is machined with six rings for mounting O-shaped rings on the inner wall of the upper lock sleeve seal nipple
Shape seal groove.
3. coiled tubing connector according to claim 2, which is characterized in that the upper lock sleeve housing main body is cylinder
Structure, the outer diameter of the upper lock sleeve housing main body is identical as the maximum outside diameter of the upper lock sleeve seal nipple, the locking
One, two, three step is successively machined on the inner wall of fixed housing main body along axial direction, the internal diameter of two stage steps is less than level-one step
With the internal diameter of three-level step, it is machined on the level-one step of the upper lock sleeve housing main body and is connect with the upper lock sleeve sealing
The internal screw thread that external screw thread in the two stage steps of head matches, is machined on the three-level step of the upper lock sleeve housing main body
Internal screw thread.
4. coiled tubing connector according to claim 3, which is characterized in that in the transition joint shell rotary joint
Outer wall on be successively machined with one, two, three, four, Pyatyi step along axial direction, the outer diameter of level-one step and the upper coiled tubing
Internal diameter is identical；The outer diameter of two stage steps is bigger than the outer diameter of the level-one step, be machined in the two stage steps with it is described on
The external screw thread that internal screw thread on the three-level step of lock sleeve housing main body matches；The outer diameter of three-level step is than the two stage steps
Outer diameter it is big, be the coiled tubing connector maximum outside diameter；The outer diameter phase of the outer diameter of level Four step and the two stage steps
Together, external screw thread is machined on the level Four step；The outer diameter of Pyatyi step is identical as the outer diameter of the level-one step.
5. coiled tubing connector according to claim 3, which is characterized in that fixed taper slips outside the upper lock sleeve
For cylindrical structure, the upper lock sleeve fixes the internal diameter of the outer diameter of taper slips and the two stage steps of the upper lock sleeve shell outside
Identical, the inner wall of fixed taper slips gradually successively decreases outside the upper lock sleeve for the direction internal diameter towards the transition joint assembly
Circular conical surface, the circular conical surface abut the three-level step of the upper lock sleeve seal nipple far from one end of the transition joint assembly
End face.
6. coiled tubing connector according to claim 1, which is characterized in that slide taper slips in the upper lock sleeve
Internal diameter for cylindrical structure, the interior sliding taper slips of the upper lock sleeve is identical as the outer diameter of the upper coiled tubing, described
The equally distributed sawtooth in direction towards the transition joint assembly is machined in upper lock sleeve on the inner wall of sliding taper slips,
One, two, three is successively machined with towards transition joint assembly direction on the outer wall of sliding taper slips in the upper lock sleeve
Step, the outer wall of level-one step are the circular conical surface that the direction of outer diameter towards the transition joint assembly is gradually incremented by；Two stage steps
Outer wall is barrel surface, and the upper lock sleeve preloading spring is placed in the two stage steps；The outer diameter of three-level step is towards in described
Between connector assembly direction gradually gradually it is micro- be incremented by.
7. coiled tubing connector according to claim 3, which is characterized in that the upper lock sleeve coiled tubing antiskid card
It watt is two semicircular rings, the outer walls of two semicircular rings is barrel surface, the outer diameter of two semicircular rings and the upper lock sleeve shell
Internal diameter is identical, and the sawtooth gradually to successively decrease towards the direction of the transition joint assembly is machined on the inner wall of two semicircular rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928524.7U CN209212173U (en) | 2018-11-22 | 2018-11-22 | Coiled tubing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928524.7U CN209212173U (en) | 2018-11-22 | 2018-11-22 | Coiled tubing connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209212173U true CN209212173U (en) | 2019-08-06 |
Family
ID=67460622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821928524.7U Withdrawn - After Issue CN209212173U (en) | 2018-11-22 | 2018-11-22 | Coiled tubing connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209212173U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138856A (en) * | 2018-11-22 | 2019-01-04 | 重庆科技学院 | Coiled tubing connector |
-
2018
- 2018-11-22 CN CN201821928524.7U patent/CN209212173U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138856A (en) * | 2018-11-22 | 2019-01-04 | 重庆科技学院 | Coiled tubing connector |
| CN109138856B (en) * | 2018-11-22 | 2023-11-10 | 重庆科技学院 | coiled tubing connector |
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