CN209129544U - Equal outer diameters external slips coiled tubing connector - Google Patents
Equal outer diameters external slips coiled tubing connector Download PDFInfo
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- CN209129544U CN209129544U CN201821928197.5U CN201821928197U CN209129544U CN 209129544 U CN209129544 U CN 209129544U CN 201821928197 U CN201821928197 U CN 201821928197U CN 209129544 U CN209129544 U CN 209129544U
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Abstract
The utility model provides a kind of Deng outer diameters external slips coiled tubing connector, including the upper coiled tubing connector assembly for connecting upper coiled tubing, lower coiled tubing connector assembly and transition joint assembly for connecting lower coiled tubing, upper coiled tubing connector assembly and lower coiled tubing connector assembly are threaded in the both ends of transition joint assembly, and upper coiled tubing connector assembly includes upper coiled tubing connection core pipe, upper coiled tubing joint shell, upper coiled tubing joint sliding taper slips and upper coiled tubing connector wedge block；Transition joint assembly includes intermediate thread connector and intermediate rotary joint；Other structures of the lower coiled tubing connector assembly in addition to lower coiled tubing joint shell are identical as the structure of upper coiled tubing connector assembly.For the utility model using that can reduce the length of single roller coiled tubing, to reduce interior cyclic pressure dissipation of the coiled tubing on roller, coiled tubing connector outer diameter is identical as coiled tubing outer diameter, can be by under injection head injection well.
Description
Technical field
The utility model belongs to oil-gas well engineering technical field, more specifically, is related to a kind of for coiled tubing and company
Buckle the equal outer diameters external slips coiled tubing connector connected in the rotation of continuous oil pipe, coiled tubing deep-well, ultradeep well etc. other
When special operation well, longer coiled tubing is needed, single long coiled tubing of roller is not able to satisfy transport and requires, need to be by single roller
Long coiled tubing is divided into the short coiled tubing of multiple rollers and transports to well site progress operation, while the single long coiled tubing of roller is because even
Continuous oil pipe causes secondary vortex flow to act on after the bending of roller, and cyclic pressure dissipation is larger, coiled tubing that can be short with multiple rollers
The long coiled tubing of single roller is substituted, to reduce circulation of drilling fluid pressure consumption, this is just needed between coiled tubing and coiled tubing
Attachment device；Secondly, coiled tubing needs the circumferential torque transmitted in coiled tubing deep-well, ultradeep well or drillng operation
It is all bigger with axial tension.This coiled tubing connector, to the clamping of coiled tubing end, guarantees continuous oil using conical sliding block
Manage the fastness connecting with connector；The coiled tubing connector locks taper slips using detaining in outer sliding sleeve rotation,
And be screwed, realize torque transmitting, the coiled tubing connector outer diameter is identical as coiled tubing outer diameter, can pass through injection
Under head injection well.
Background technique
Coiled tubing is widely used in old street district, well workover, salvaging, gaslift, downhole intelligent, automation application, The Small Well
The operations such as eye drilling well.Coiled tubing has operating efficiency high, it is easy to accomplish the advantages that automation, can be improved old filed, " low
The difficult development benefit for employing oil-gas reservoir such as three low oil-gas reservoirs of pressure, hypotonic, low yield ", unconventional gas reservoir, densification especially in China
In terms of the exploration and development of 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:
(1) when continuous oil pipe operation, the coiled tubing being wrapped on roller, by under injection head injection well, due to being used for
The coiled tubing diameter of operation is smaller, and hydrophthalmia diameter is smaller in coiled tubing, when using continuous oil pipe operation, is wrapped in roller
On coiled tubing due to the influence of secondary vortex flow, cause hydrophthalmia cyclic pressure dissipation in the coiled tubing being wrapped on roller larger,
Seriously affect the distribution of coiled tubing underground work water power.Therefore, when carrying out underground work, it is necessary to by long coiled tubing
It is respectively wound around on different rollers, reduces interior cyclic pressure dissipation of the coiled tubing on roller, this just needs special continuous oil
Connector between pipe and coiled tubing.
(2) it is limited by highway transportation, coiled tubing cannot be too long on single roller, will be long required for deep-well and ultradeep well
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, this
Sample can be only achieved the purpose that underground work is completed with long coiled tubing, it is also desirable between special coiled tubing and coiled tubing
Connector.
(3) for coiled tubing deep-well, ultradeep well or drilling well coiled tubing underground work, coiled tubing transmits axial tension
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, connector, grasper, rivets tightly device etc., is a kind of exist
Ground quickly connects a kind of fastening means of coiled tubing and coiled tubing or downhole tool.Coiled tubing connector is according to locking
Mode can be divided into screw-type, slip-type, groove ring pressure type etc..Most of coiled tubing connectors are mainly disadvantageous in that:
(1) screw-type coiled tubing connector carries out locking connection to coiled tubing outer wall generally by screw, realizes
The transmitting of torque and pulling force belongs to single outer wall pressuring action mostly, and the torque and tensile stress of transmitting are smaller, not applicable and active force
It is required that the operations such as biggish coiled tubing drilling or deep-well and ultradeep well；Most of screw-type connector is needed in connection procedure simultaneously
It is pivoted and is just able to achieve button connection, when coiled tubing is connect with coiled tubing, two connection coiled tubings cannot all revolve
Turn, therefore simple screw-type coiled tubing connector is not suitable for the connection operation of coiled tubing and coiled tubing.
(2) slip-type coiled tubing connector adds taper slips or coiled tubing inner wall generally by coiled tubing outer wall
Add the mode of single side clamping of expansion slips to be attached, slips clamping force is limited, the torque that is transmitted after connection and tensile stress compared with
It is small, it is not suitable for and the biggish coiled tubing drilling of effect force request or the operations such as deep-well and ultradeep well；Most of slip-type simultaneously
Connector needs to link closely around axial-rotation in connection procedure to be just able to achieve slips and is in clamping connection, when coiled tubing and coiled tubing company
When connecing, two connection coiled tubings cannot all rotate, therefore simple slip-type coiled tubing connector is not suitable for continuous oil yet
The connection operation of pipe and coiled tubing.
(3) groove ring pressure type coiled tubing connector is by being pressed into coiled tubing inner hole with annular groove by force mostly
Supporting slip realizes the connection with coiled tubing using the snap action of annular groove, this kind of connector does not need to revolve when connecting
Turn, the connection that can be used between coiled tubing and coiled tubing, it can also be used to the connection of coiled tubing and downhole tool, but due to
The frictional force that groove ring pressure type depends on the outer swelling pressure of inner wall tightly to generate mostly realizes the transmitting of torque and pulling force, the torque of transmitting and
Tensile stress is smaller, and the coiled tubing deep-well bigger to pulling force and torque demand, ultradeep well or drillng operation are not applicable.
(4) successfully apply for, most of spiral shell 50 nearly with the Chinese patent of coiled tubing connector of authorization at present
Nail type and slip-type coiled tubing connector are generally by the shape for adding screw to fix or add slips fixed coiled tubing outer wall
Formula, coiled tubing outer diameter of the connector outer diameter usually than being connected is big, is unfavorable for across injection head, it is therefore desirable to injection head
It is reequiped, well operations under live coiled tubing could be completed.
In conclusion either screw-type, slip-type or groove ring pressure type, these coiled tubing connectors can mention
The pulling force or torque of confession are smaller, and while connecting much requires rotation and link closely to realize tightening for slips or screw, and continuous
Oil pipe connection operation scene, by roller cannot rotate with the not revolvable limitation of underground continuous oil pipe, on connector lower contact it
Between be unable to relative rotation, cause the rotation of the needs such as most of screw-type, slip-type, groove ring pressure type to be linked closely the just company of being able to achieve
The coiled tubing connector connect, which may not apply to connection between coiled tubing and coiled tubing or small part, can rotate connection,
But the pulling force or torque that can be provided are all smaller, be not able to satisfy the coiled tubing deep-well bigger for pulling force and torque demand,
Ultradeep well or the multiple roller coiled tubing connection requirements of drillng operation.
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, this mode mostly use the hybrid mechanism of the diversified forms such as screw, slips, groove, while during connection, mostly
The taper slips that links closely by rotation is needed, realizes the connection of the large torque of interior external pressurized and the coiled tubing of axial tension.At present
In the market, be individually for coiled tubing connector provide rotation connect and for deep-well, ultradeep well or the big axial tension of drilling well and
The coiled tubing connector country of big circumferential direction torque is not yet.
Utility model content
It in view of the above problems, should the purpose of the utility model is to provide a kind of equal outer diameters external slips coiled tubing connector
The outer diameter of connector and the outer diameter of coiled tubing keep unified, can be by under injection head injection well.When carrying out underground work,
It needs to be respectively wound around long coiled tubing on different rollers, reduces interior cyclic pressure dissipation of the coiled tubing on roller, this is just
Need the connector between special coiled tubing and coiled tubing.
In order to achieve the above object, the technical solution of design is as follows:
Equal outer diameters external slips coiled tubing connector provided by the utility model, comprising: for connecting upper coiled tubing
Upper coiled tubing connector assembly, lower coiled tubing connector assembly and transition joint assembly for connecting lower coiled tubing, upper company
Continuous oil connection assembly and lower coiled tubing connector assembly are threaded in the both ends of transition joint assembly；Wherein, upper continuous oil
Pipe fitting assembly includes upper coiled tubing connection core pipe, upper coiled tubing joint shell, upper coiled tubing joint sliding conic clamp
Watt and upper coiled tubing connector wedge block, upper coiled tubing connection core pipe be the cylinder for becoming outer diameter, coiled tubing and it is upper continuously
Oil connection shell is slided over respectively in coiled tubing connection core pipe, and upper coiled tubing joint sliding taper slips is located at continuous
It is connected together in cavity between oil pipe and upper coiled tubing joint shell and by the two, upper coiled tubing connector wedge block
Between upper coiled tubing joint shell and upper coiled tubing connection core pipe, one end wedge of upper coiled tubing connector wedge block
Enter coiled tubing and upper coiled tubing connection core pipe between wedging method in, the other end of upper coiled tubing connector wedge block and insert
The connector coiled tubing screw entered in upper coiled tubing joint shell leans；Transition joint assembly includes intermediate thread connector
With intermediate rotary joint, intermediate rotary joint is sleeved on intermediate thread connector, and upper coiled tubing joint shell is threadedly coupled
Between intermediate rotary joint and intermediate thread connector；Lower coiled tubing connector assembly includes connecting core pipe with upper coiled tubing
The identical lower coiled tubing of structure connects core pipe, lower coiled tubing identical with upper coiled tubing joint sliding taper kava structure
Joint sliding taper slips, lower coiled tubing connector wedge block identical with upper coiled tubing connector wedge block structure and under
Coiled tubing joint shell, lower coiled tubing joint shell are threadedly coupled with intermediate thread connector, outside lower coiled tubing connector
The end face of shell leans with intermediate rotary joint.
Furthermore it is preferred that scheme be, upper coiled tubing include integral structure coiled tubing ontology and coiled tubing cutting
Body, coiled tubing ontology are the coiled tubing not cut, and coiled tubing cutting body is axial by the lower end edge of coiled tubing ontology
Uniformly cut.
Additionally, it is preferred that scheme be that the upper coiled tubing connection biggish outer tube wall of core pipe outer diameter is with coiled tubing ontology
Interference fit is machined with six ring seal Cao Yu tri- on the upper coiled tubing connection biggish outer tube wall of core pipe outer diameter and compresses
Slot, three ring seals Cao Yu, tri- pressing groove therein are alternately distributed, and in addition three ring seal slots are continuously distributed；In upper company
Fluted, annular seal groove and external screw thread, the outer diameter of groove are successively processed on the continuous oil pipe connection lesser outer tube wall of core pipe outer diameter
Identical as the internal diameter of coiled tubing cutting body, coiled tubing cutting body is bonded with groove, and annular seal groove is used for mounting O-shaped rings.
Furthermore Preferable scheme is that being successively machined with zigzag structure, recessed on the inner wall of upper coiled tubing joint shell
For slot and one to level Four step, the internal diameter of level-one step is less than the internal diameter of groove, is machined on level-one step and connects for installing
The screw hole of head coiled tubing screw；The internal diameter of two stage steps is less than the internal diameter of level-one step, adds on the inner wall of two stage steps
The internal screw thread that work has the external screw thread connecting in core pipe with upper coiled tubing to match；The internal diameter of three-level step is less than two stage steps
Internal diameter；The internal diameter of level Four step is less than the internal diameter of three-level step, processes on the inner wall of level Four step at least together for installing O
The outer wall of the annular seal groove of type circle, level Four step is taper, is machined with external screw thread on the outer wall of level Four step.
In addition, upper coiled tubing joint sliding taper slips is the cylindrical structure of the identical annulus composition of four valve structures,
Small broached-tooth design, the outer wall clamping of small broached-tooth design and coiled tubing cutting body are machined on the inner wall of cylindrical structure；In cylinder
Big broached-tooth design, the zigzag structure on big broached-tooth design and upper coiled tubing joint shell inner wall are machined on the outer wall of structure
It matches.
Additionally, it is preferred that scheme be that the internal diameter of upper coiled tubing connector wedge block connect core pipe with upper coiled tubing
The outer diameter of groove is identical, and one end of upper coiled tubing connector wedge block is the conical surface, and the other end is barrel surface.
Furthermore Preferable scheme is that upper coiled tubing connector wedge block is composed of two mutually isostructural semi-rings,
One end of each semi-ring is double card locking structure, and the other end is single deck tape-recorder locking structure, the single deck tape-recorder locking structure of a semi-ring and another half
The double card locking structure of ring is engaged, and forms the upper coiled tubing connector wedge block of the domain.
Furthermore it is preferred that scheme be that zigzag structure, recessed is successively machined on the inner wall of lower coiled tubing joint shell
For slot and one to Pyatyi step, the internal diameter of level-one step is less than the internal diameter of groove, is machined on level-one step for connecing under installing
The screw hole of head coiled tubing screw；The internal diameter of two stage steps is less than the internal diameter of level-one step, adds on the inner wall of two stage steps
The internal screw thread that work has the external screw thread connecting in core pipe with lower coiled tubing to match；The internal diameter of three-level step is less than two stage steps
Internal diameter；The internal diameter of level Four step is less than the internal diameter of two stage steps and is greater than the internal diameter of three-level step, on the inner wall of level Four step
Processing is at least used for the annular seal groove of mounting O-shaped rings together, and the internal diameter of Pyatyi step and the internal diameter of two stage steps are equal, five
Internal screw thread is machined on the inner wall of grade step.
Additionally, it is preferred that scheme be, intermediate thread connector be cylindrical structure, on the inner wall of intermediate thread connector plus
Work has one to Pyatyi step, and the outer diameter of level-one step is equal with the internal diameter of level Four step of upper coiled tubing joint shell；Second level
The outer diameter of step is greater than the outer diameter of level-one step, is evenly distributed on the outer wall of two stage steps and is machined with blind hole；Three-level step
Outer diameter it is equal with the outer diameter of level-one step；The outer diameter of level Four step is less than the outer diameter of three-level step, in the outer diameter of level Four step
On be machined with the external screw thread matched with the internal screw thread of the Pyatyi step of lower coiled tubing joint shell；The outer diameter of Pyatyi step is small
In the outer diameter of level Four step.
Furthermore Preferable scheme is that intermediate rotary joint is cylindrical structure, successively add on the inner wall of intermediate rotary joint
One, two, three step that work has internal diameter gradually to successively decrease, the inner wall of the level-one step of intermediate rotary joint are taper, are revolved in centre
It is machined on the inner wall of the level-one step of adapter and matches with the external screw thread of the level Four step of upper coiled tubing joint shell
Internal screw thread；The internal diameter of the two stage steps of intermediate rotary joint is equal with the outer diameter of the two stage steps of intermediate thread connector, in
Between rotary joint two stage steps on correspond to blind hole position be threaded through-hole；The three-level step of intermediate rotary joint
Internal diameter is equal with the outer diameter of three-level step of intermediate thread connector, processes on the inner wall of the three-level step of intermediate rotary joint
There is the annular seal groove for being at least used for mounting O-shaped rings together.
Compared with prior art, equal outer diameters external slips coiled tubing connector provided by the utility model can obtain following
Technical effect:
(1), outer diameter is small, and operation is convenient: coiled tubing connector outer diameter is identical as coiled tubing outer diameter, without to injection head
It is changed, scene is easy to use；
(2), comprehensive strong: the connector contains three kinds of connection sides such as screw prefastening, slip-type, groove ring pressure type
Formula is comprehensive strong；
(3), with strong points: the continuous oil of large torque, big axial tension is needed mainly for deep-well, ultradeep well, drilling well etc.
Connection between pipe and coiled tubing；
(4), pulling force is big, torque is big: can not only transmit big pulling force, while can also transmit big torque, be advantageously implemented
Multiple-roll coiled tubing connection drilling, effectively reduces the length of single roller coiled tubing, to substantially reduce because of roller mistake
Cyclic pressure dissipation brought by long.
(5), 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
Operation 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.
(6), traffic limitation is avoided.
(7), the water power loss for effectively reducing ground coiled tubing, is conducive to execute-in-place.
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 schematic diagram of the section structure of the equal outer diameters external slips coiled tubing connector of the utility model；
Fig. 2 is the upper coiled tubing connector assembly half-section diagram of the utility model；
Fig. 3 is the half section structure diagram of the transition joint assembly of the utility model；
Fig. 4 is the half section structure diagram of the lower coiled tubing connector assembly of the utility model；
Fig. 5 a is the half section structure diagram of the upper coiled tubing of the utility model；
Fig. 5 b is the plane outspread drawing of the upper coiled tubing of the utility model；
Fig. 6 is that the upper coiled tubing of the utility model connects the half section structure diagram of core pipe；
Fig. 7 is the half section structure diagram of the upper coiled tubing joint shell of the utility model；
Fig. 8 a is the half section structure diagram of the upper coiled tubing joint sliding taper slips of the utility model；
Fig. 8 b is the side view of coiled tubing joint sliding taper slips on the pintongs of the utility model；
Fig. 9 a is the wedge block half section structure diagram of the upper coiled tubing connector of the utility model；
Fig. 9 b is the side view of the wedge block of the upper coiled tubing connector of the utility model；
Figure 10 is the half section structure diagram of the intermediate thread connector of the utility model；
Figure 11 is the half section structure diagram of the intermediate rotary joint of the utility model；
Figure 12 is the half section structure diagram of the lower coiled tubing joint shell of the utility model.
Appended drawing reference therein include: under coiled tubing connector assembly on 1-, 2- transition joint assembly, 3- coiled tubing connect
The upper coiled tubing connection core pipe of head assembly, the upper coiled tubing of 11-, 12-, the upper coiled tubing joint shell of 13-, the upper continuous oil of 14-
Pipe fitting slides taper slips, the upper coiled tubing connector wedge block of 15-, 16- top connection coiled tubing screw, 21- middle screw
Coiled tubing connects under coiled tubing connection core pipe, 33- under coiled tubing, 32- under rotary joint, 31- among line connector, 22-
Coiled tubing connector wedge block, 36- lower contact are continuous under coiled tubing joint sliding taper slips, 35- under head shell, 34-
Oil pipe screw.
Identical label indicates similar or corresponding feature or function in all the appended drawings.
Specific embodiment
The utility model is described in detail below with reference to attached drawing.
As shown in Figure 1, equal outer diameters external slips coiled tubing connector provided by the utility model, comprising: upper coiled tubing
Connector assembly 1, transition joint assembly 2 and lower coiled tubing connector assembly 3, upper coiled tubing connector assembly 1 are total in transition joint
At 2 left end, it is threadedly coupled with transition joint assembly 2；Lower coiled tubing connector assembly 3 transition joint assembly 2 right end, with
Transition joint assembly 2 is threadedly coupled；Transition joint assembly 2 connects for connecting coiled tubing connector assembly 1 with lower coiled tubing
Head assembly 3, lower coiled tubing connector assembly 3 is for connecting lower coiled tubing 31, and upper coiled tubing connector assembly 1 is for connecting
Coiled tubing 11；Wait the outer diameter of outer diameters external slips coiled tubing connector, the outer diameter of upper coiled tubing 11 and lower coiled tubing 31
Outer diameter it is all the same, and wait outer diameters external slips coiled tubing connector, upper coiled tubing 11 and lower 31 three of coiled tubing coaxial.
As shown in Fig. 1,2,5a, 5b, upper coiled tubing 11 by integral structure upper coiled tubing ontology and upper coiled tubing
Cutting body two parts composition, upper coiled tubing ontology is the coiled tubing not cut, by the end edge of upper coiled tubing ontology
The axial circular ring structure for being uniformly cut into four 1/4, four 1/4 circular ring structures are combined into columnar upper coiled tubing cutting
Body, the outer diameter of upper coiled tubing cutting body are less than the outer diameter of upper coiled tubing ontology.The structure of lower coiled tubing 31 and upper continuous
The structure of oil pipe 11 is identical, therefore details are not described herein.
As depicted in figs. 1 and 2, upper coiled tubing connector assembly 1 includes: upper coiled tubing connection core pipe 12, upper continuous oil
Pipe fitting shell 13, upper coiled tubing joint sliding taper slips 14, upper coiled tubing connector wedge block 15 and top connection connect
Continuous oil pipe screw 16；Wherein, upper coiled tubing connection core pipe 12 is the cylinder for becoming outer diameter, upper coiled tubing 11 and upper coiled tubing
Joint shell 13 is slided over respectively in coiled tubing connection core pipe 12, and upper coiled tubing joint sliding taper slips 14 is located at upper
It is connected together in cavity between coiled tubing 11 and upper coiled tubing joint shell 13 and by the two, upper coiled tubing connector
Wedge block 15 is located between upper coiled tubing joint shell 13 and upper coiled tubing connection core pipe 12, upper coiled tubing connector wedge
One end of shape sliding block 15 is wedged in the wedging method between upper coiled tubing 11 and upper coiled tubing connection core pipe 12, and upper coiled tubing connects
The other end of head wedge block 15 leans with the top connection coiled tubing screw 16 being inserted into upper coiled tubing joint shell 13.
As shown in Fig. 1,2,6, upper coiled tubing connection core pipe 12 is a cylinder-like structure, connects core in upper coiled tubing
Be processed as on the left end outer wall of pipe 12 one section of outer diameter be slightly larger than upper 11 internal diameter of coiled tubing seal section, upper coiled tubing 11 with it is upper
The seal section that coiled tubing connects core pipe 12 is interference fit, processes six on the seal section of upper coiled tubing connection core pipe 12
Ring seal slot and three pressing grooves, from the left end of seal section to three ring seal Cao Yu tri- of right end (i.e. from left to right)
Pressing groove is alternately distributed, and in addition three ring seal slots are continuously distributed；The middle section of upper coiled tubing connection core pipe 12 is one
A groove, the outer diameter of groove are identical as the internal diameter of upper coiled tubing cutting body of upper coiled tubing 11；Upper coiled tubing connects core
The cylinder that the right end of pipe 12 is one section bigger than groove outer diameter, is machined with twice annular seal groove in the left end of cylinder, for installing O
Type circle is machined with external screw thread in the right end of cylinder.
The upper coiled tubing cutting body of upper coiled tubing 11 connect the groove phase of 12 middle section of core pipe with upper coiled tubing
Fitting.
As shown in Fig. 1,2,7, the outer diameter of upper coiled tubing joint shell 13 and equal outer diameters external slips coiled tubing connector
Outer diameter it is identical and the two is coaxial.Zigzag structure is machined in the inner wall left end of upper coiled tubing joint shell 13；It is upper continuous
The inner wall middle section of oil connection shell 13 is groove, is machined with one, two, three, four step on the right side of groove, from left to right
It sees, the internal diameter of level-one step is smaller than the internal diameter of groove, and is barrel surface, screw hole is processed in the left end of level-one step, for pacifying
Load onto connector coiled tubing screw 16；The internal diameter of two stage steps is smaller than the internal diameter of level-one step, adds on the inner wall of two stage steps
Work has internal screw thread, and the external screw thread which connect on 12 outer wall of core pipe with upper coiled tubing matches；The internal diameter of three-level step
Smaller than the internal diameter of two stage steps, internal diameter is the internal diameter of equal outer diameters external slips coiled tubing connector, and the inner wall of three-level step is circle
Cylinder face；The internal diameter of level Four step and the internal diameter of two stage steps are equal, and the inner wall of level Four step is barrel surface, in level Four step
It is machined with three annular seal grooves on wall, is used for mounting O-shaped rings, the outer wall of level Four step is taper, in the outer wall of level Four step
Upper processing screw thread.
As shown in Fig. 1,2,8a, 8b, upper coiled tubing joint sliding taper slips 14 is identical 1/4 annulus of four valve structures
The cylindrical structure of composition is machined with small broached-tooth design on the inner wall of upper coiled tubing joint sliding taper slips 14, in upper company
The big broached-tooth design reversed with small broached-tooth design is machined on the outer wall of continuous oil connection sliding taper slips 14；Upper coiled tubing
Joint sliding taper slips 14 is in the cavity inside between upper coiled tubing joint shell 13 and upper coiled tubing 11, upper continuous
Oil connection slides the big broached-tooth design of 14 outer wall of taper slips and the zigzag of upper 13 inner wall left end of coiled tubing joint shell
Structure cooperation；The small broached-tooth design of upper 14 inner wall of coiled tubing joint sliding taper slips and the outer wall of upper coiled tubing cutting body
Clamping increases the frictional resistance between coiled tubing connector and upper coiled tubing cutting body.
As shown in Fig. 1,2,9a, 9b, the internal diameter of upper coiled tubing connector wedge block 15 connect core pipe with upper coiled tubing
The outer diameter of 12 grooves is identical, and the left end outer wall of upper coiled tubing connector wedge block 15 is processed as outer diameter cone left small and right large
Face, the right end outer wall of upper coiled tubing connector wedge block 15 are barrel surface.
Upper coiled tubing connector wedge block 15 is combined by mutually isostructural two semi-rings and is formed, and one end of semi-ring is double card
Locking structure, the other end are single deck tape-recorder locking structure, and the single deck tape-recorder locking structure of a semi-ring is engaged with the double card locking structure of another semi-ring, shape
At the upper coiled tubing connector wedge block 15 of a domain.Its position is in upper coiled tubing joint shell 13 and upper continuous oil
Pipe connects 12 middle position of core pipe, the right end of upper coiled tubing connector wedge block 15 against top connection coiled tubing screw 16,
The left end of upper coiled tubing connector wedge block 15 is wedged between coiled tubing 11 and upper coiled tubing connection core pipe 12, on
Coiled tubing connector wedge block 15 provides extruding force for the end of upper coiled tubing 11.
As shown in Figure 1,3, transition joint assembly 2, including intermediate thread connector 21 and intermediate rotary joint 22, middle screw
Line connector 21 is in the inside of intermediate rotary joint 22, and intermediate rotary joint 22 is in the outside of intermediate thread connector 21, the two
It is connected by screw to.
As shown in Fig. 1,3,10, the internal diameter of intermediate thread connector 21 is interior with equal outer diameters external slips coiled tubing connector
Diameter is equal and the two is coaxial；The inner wall of intermediate thread rotary joint 21 is cylinder, and one, two, three, four, five are machined on inner wall
Grade step, the left end of intermediate thread rotary joint 21 are level-one step, the outer diameter of the level-one step of intermediate thread rotary joint 21
It is equal with the internal diameter of level Four step of upper 13 inner wall of coiled tubing joint shell；The two stage steps of intermediate thread rotary joint 21
Outer diameter is bigger than the outer diameter of the level-one step of intermediate thread rotary joint 21, in the middle position processing blind hole of two stage steps outer wall；
The three-level step of intermediate thread rotary joint 21 and the outer diameter of level-one step of intermediate thread rotary joint 21 are identical；Intermediate thread
The outer diameter of the level Four step of rotary joint 21 is smaller than the outer diameter of the three-level step of intermediate thread rotary joint 21, revolves in intermediate thread
External screw thread is machined on the outer wall of the level Four step of adapter 21；In the outer diameter ratio of the Pyatyi step of intermediate thread rotary joint 21
Between screw thread rotation connector 21 level Four step outer diameter it is small.
As shown in Fig. 1,3,11, the outer wall of intermediate rotary joint 22 is columnar structured, the outer diameter of intermediate rotary joint 22
It is equal with equal outer diameter of outer diameters external slips coiled tubing connector, and the two is coaxial；Add on the inner wall of intermediate rotary joint 22
Work has one, two, three step that from left to right internal diameter reduces, and the inner wall of level-one step is taper, on the inner wall of level-one step
It is machined with the internal screw thread matched with the external screw thread of the level Four step of upper coiled tubing joint shell 13；The inner wall of two stage steps is
The internal diameter of cylinder, the two stage steps of intermediate rotary joint 22 is equal with the outer diameter of the two stage steps of intermediate thread connector 21,
Four threaded holes of processing, the threaded hole and intermediate thread connector 21 are evenly distributed in the two stage steps of intermediate rotary joint 22
The blind holes of two stage steps match；The internal diameter of the three-level step of intermediate rotary joint 22 and the three-level of intermediate thread connector 21
The outer diameter of step is equal, is machined on the inner wall of the three-level step of intermediate rotary joint 22 at least together for mounting O-shaped rings
Annular seal groove.
As shown in figs. 1 and 4, lower coiled tubing connector assembly 3 includes: lower coiled tubing connection core pipe 32, lower coiled tubing
Joint shell 33, lower coiled tubing joint sliding taper slips 34, lower coiled tubing connector wedge block 35, lower contact are continuously oily
Pipe screw 36；Wherein, the structure of lower coiled tubing connection core pipe 32 is identical as the upper coiled tubing connection structure of core pipe 12, lower company
The structure of continuous oil connection sliding taper slips 34 is identical as the structure of upper coiled tubing joint sliding taper slips 14, lower continuous
The structure of oil connection wedge block 35 is identical as the structure of upper coiled tubing connector wedge block 15, lower contact coiled tubing spiral shell
The structure of nail 36 is identical as the structure of top connection coiled tubing screw 16.
The structure of the structure and upper coiled tubing joint shell 13 of lower coiled tubing joint shell 33 is slightly different, as Fig. 1,
4, shown in 12, the outer diameter of lower coiled tubing joint shell 33 is identical as equal outer diameter of outer diameters external slips coiled tubing connector and two
Person is coaxial, one, two, three, four, Pyatyi step is machined with from left to right on the inner wall of lower coiled tubing joint shell 33, one
It is machined with internal screw thread on the inner wall of grade step, the external screw thread of the level Four step of the internal screw thread and intermediate thread connector 21 matches
It closes；The internal diameter of two stage steps is equal with the outer diameter of Pyatyi step of intermediate thread connector 21, adds on the inner wall of two stage steps
Tri- annular seal groove of Gong You is used for mounting O-shaped rings；The internal diameter of three-level step is equal outer diameters external slips coiled tubing connector
Internal diameter, the internal diameter of three-level step are less than the internal diameter of two stage steps；It is machined with internal screw thread on the inner wall of level Four step, the internal screw thread
The external screw thread that 32 left end outer wall of core pipe is connect with lower coiled tubing matches；The internal diameter of Pyatyi step connect core with lower coiled tubing
The outer diameter of 32 left end of pipe is identical, is threaded hole on the right side of Pyatyi step, for installing lower contact coiled tubing screw 36；
The middle section of lower 33 inner wall of coiled tubing joint shell is groove；The right side processing one of lower 33 inner wall of coiled tubing joint shell
Section zigzag structure.
In the description of the utility model, it is to be understood that term " inner wall ", " outer wall ", " inside ", " outside ", " a left side
The orientation or positional relationship of the instructions such as end ", " right end ", " step ", " from left to right " is orientation based on the figure or position
Relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, should not be understood as the limitation of the utility model.
It is triangle, rectangle, trapezoidal and zigzag that external screw thread and internal screw thread in the utility model, which can be cross sectional shape,
Etc. shapes screw thread.
It is the specific descriptions about the utility model above, is merely to illustrate the utility model and is not limited to practical
Novel technical solution, those skilled in the art should understand that, still the utility model can be modified or be waited
With replacement, to reach identical technical effect；As long as meeting requirement, it is within the protection scope of the utility model.
When carrying out deep-well, ultradeep well or drillng operation with coiled tubing, can be replaced with the short coiled tubing of multiple rollers
The long coiled tubing of single roller, when lower brill: the coiled tubing often gone into the well on a roller can be connected by this coiled tubing
Device quickly connects next roller coiled tubing, and the operating process of two sections of coiled tubings connection is as follows:
Step 1: upper coiled tubing connector assembly 1:
(1) after loading onto O-ring in upper coiled tubing connection 12 seal groove of core pipe, sliding sleeve enters the conjunction of upper coiled tubing 11
Right position is set, and carries out cutting process to the end of upper coiled tubing 11；
(2) upper coiled tubing connector wedge block 15 is slided on the right side of upper coiled tubing connection 12 intermediate groove of core pipe
Suitable position；
(3) upper 14 sliding sleeve of coiled tubing joint sliding taper slips is entered to the suitable position of upper coiled tubing joint shell 13
It sets, makes the broached-tooth design and upper 13 left end inner wall of coiled tubing joint shell of 14 outer wall of coiled tubing joint sliding taper slips
Broached-tooth design cooperation；
(4) upper coiled tubing 11 is same as above coiled tubing connection core pipe 12, upper coiled tubing connector wedge block 15 together
Sliding sleeve enters the suitable position of upper coiled tubing joint shell 13；
(5) external screw thread when upper coiled tubing connection 12 right end of core pipe and upper 13 two stage steps of coiled tubing joint shell
Internal screw thread when screwing, top connection coiled tubing spiral shell is installed in the screw hole of the level-one step of upper coiled tubing joint shell 13
Nail 16.
Step 2: lower coiled tubing connector assembly 3:
(1) after loading onto O-ring in the seal groove of lower coiled tubing connection core pipe 32, sliding sleeve enters lower coiled tubing 31
Suitable position, and cutting process is carried out to the end of lower coiled tubing 31；
(2) lower coiled tubing connector wedge block 35 is slided on the left of lower coiled tubing connection 32 intermediate groove of core pipe
Suitable position；
(3) lower 34 sliding sleeve of coiled tubing joint sliding taper slips is entered to the suitable position of lower coiled tubing joint shell 33
It sets, makes the broached-tooth design and lower 33 left end inner wall of coiled tubing joint shell of lower 34 outer wall of coiled tubing joint sliding taper slips
Broached-tooth design cooperation；
(4) lower coiled tubing 31 is connected into core pipe 32, lower coiled tubing connector wedge block 35 together with lower coiled tubing
Sliding sleeve enters the suitable position of lower coiled tubing joint shell 33；
(5) the second level platform of the external screw thread of 32 left end of core pipe of coiled tubing connection instantly and lower coiled tubing joint shell 33
When the internal screw thread of rank screws, lower contact coiled tubing is installed in the screw hole of the level-one step of lower coiled tubing joint shell 33
Screw 36.
Step 3: transition joint assembly 2
(1) in the inner wall mounting O-shaped rings of the two stage steps of lower coiled tubing joint shell 33；By intermediate thread connector 21
Sliding sleeve enters the suitable position of intermediate rotary joint 22, and 21 sliding sleeve of intermediate thread connector is entered lower 13 left end of coiled tubing joint shell
Suitable position, make the external screw thread of the level Four step of intermediate thread connector 21 and the two stage steps of lower coiled tubing joint shell 13
Internal screw thread screw connection；
(2) after the level Four step mounting O-shaped rings of upper coiled tubing joint shell 13,21 sliding sleeve of intermediate thread connector enters
The suitable position of upper 13 right end of coiled tubing joint shell makes the internal screw thread of the level-one step of intermediate rotary joint 22 and upper continuous
The external screw thread of the level Four step of oil connection shell 13 screws connection；
(3) in the screw thread of the blind hole of the two stage steps of intermediate thread connector 21 and the two stage steps of intermediate rotary joint 22
Mounting screw in hole.
When continuous oil pipe operation pulls out of hole, every coiled tubing gone out coils a full roller of continuous oil pipe, can pass through
This coiled tubing connector quick-release, and remaining coiled tubing is coiled with the roller of continuous oil pipe of next sky, it is so past
Multiple circulation, whole coiled tubings may be implemented plays well operations.Dismantle the operating process and above-mentioned company that two sections of coiled tubings connect
The operating process of two sections of coiled tubings is connect just on the contrary, such as: (step 3: five → tetra- → tri- → bis- → mono-) → (step 2: five →
Four → tri- → bis- → mono-) → (step 1: three → bis- → mono-).
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 (10)
1. a kind of equal outer diameters external slips coiled tubing connector, which is characterized in that including the upper company for connecting upper coiled tubing
Continuous oil connection assembly, lower coiled tubing connector assembly and transition joint assembly for connecting lower coiled tubing, the upper company
Continuous oil connection assembly and the lower coiled tubing connector assembly are threaded in the both ends of the transition joint assembly；Wherein,
The upper coiled tubing connector assembly includes upper coiled tubing connection core pipe, upper coiled tubing joint shell, upper continuous oil
Pipe fitting slides taper slips and upper coiled tubing connector wedge block, and the upper coiled tubing connection core pipe is the circle for becoming outer diameter
Cylinder, the coiled tubing slide over the upper coiled tubing with the upper coiled tubing joint shell respectively and connect in core pipe, institute
State the sky that coiled tubing joint sliding taper slips is located between the coiled tubing and the upper coiled tubing joint shell
It is intracavitary and the two is connected together, the upper coiled tubing connector wedge block be located at the upper coiled tubing joint shell with
Between the upper coiled tubing connection core pipe, one end of the upper coiled tubing connector wedge block wedge the coiled tubing with
In wedging method between the upper coiled tubing connection core pipe, the other end of the upper coiled tubing connector wedge block and insertion institute
The connector coiled tubing screw stated in coiled tubing joint shell leans；
The transition joint assembly includes intermediate thread connector and intermediate rotary joint, and the intermediate rotary joint is sleeved on institute
It states on intermediate thread connector, the upper coiled tubing joint shell is threaded in the intermediate rotary joint and the centre
Between threaded connector；
The lower coiled tubing connector assembly includes connecting the identical lower coiled tubing of core pipe structure with the upper coiled tubing to connect
Connect core pipe, lower coiled tubing joint sliding taper slips identical with the upper coiled tubing joint sliding taper kava structure,
With the upper identical lower coiled tubing connector wedge block of coiled tubing connector wedge block structure and lower coiled tubing connector
Shell, the lower coiled tubing joint shell are threadedly coupled with the intermediate thread connector, outside the lower coiled tubing connector
The end face of shell and the intermediate rotary joint lean.
2. equal outer diameters external slips coiled tubing connector according to claim 1, which is characterized in that the upper coiled tubing
Coiled tubing ontology and coiled tubing cutting body including integral structure, the coiled tubing ontology are the continuous oil not cut
Pipe, the coiled tubing cutting body are axially uniformly cut by the lower end edge of the coiled tubing ontology.
3. equal outer diameters external slips coiled tubing connector according to claim 2, which is characterized in that the upper coiled tubing
It connects the biggish outer tube wall of core pipe outer diameter and the coiled tubing ontology is interference fit, connect core pipe in the upper coiled tubing
Six ring seal Cao Yu, tri- pressing groove, three ring seals Cao Yu tri- therein are machined on the biggish outer tube wall of outer diameter
Pressing groove is alternately distributed, and in addition three ring seal slots are continuously distributed；
Fluted, annular seal groove and outer spiral shell are successively processed on the upper coiled tubing connection lesser outer tube wall of core pipe outer diameter
Line, the outer diameter of the groove is identical as the internal diameter of the coiled tubing cutting body, the coiled tubing cutting body and the groove
Fitting, the annular seal groove are used for mounting O-shaped rings.
4. equal outer diameters external slips coiled tubing connector according to claim 3, which is characterized in that in the upper continuous oil
Zigzag structure, groove and one are successively machined on the inner wall of pipe fitting shell to level Four step, the internal diameter of level-one step is less than
The internal diameter of the groove is machined with the screw hole for installing top connection coiled tubing screw on the level-one step；Second level
The internal diameter of step is less than the internal diameter of the level-one step, is machined on the inner wall of the two stage steps and the upper coiled tubing
The internal screw thread that external screw thread in connection core pipe matches；The internal diameter of three-level step is less than the internal diameter of the two stage steps；Level Four platform
The internal diameter of rank is less than the internal diameter of the three-level step, processes on the inner wall of the level Four step at least together for mounting O-shaped
The outer wall of the annular seal groove of circle, the level Four step is taper, is machined with external screw thread on the outer wall of the level Four step.
5. equal outer diameters external slips coiled tubing connector according to claim 4, which is characterized in that the upper coiled tubing
Joint sliding taper slips is the cylindrical structure of the identical annulus composition of four valve structures, is processed on the inner wall of the cylindrical structure
There are small broached-tooth design, the outer wall clamping of the small broached-tooth design and the coiled tubing cutting body；In the outer of the cylindrical structure
Big broached-tooth design, the zigzag structure on the big broached-tooth design and the upper coiled tubing joint shell inner wall are machined on wall
It matches.
6. equal outer diameters external slips coiled tubing connector according to claim 3, which is characterized in that the upper coiled tubing
The internal diameter of connector wedge block is identical as the upper coiled tubing connection outer diameter of groove of core pipe, and the upper coiled tubing connects
One end of head wedge block is the conical surface, and the other end is barrel surface.
7. equal outer diameters external slips coiled tubing connector according to claim 6, which is characterized in that the upper coiled tubing
Connector wedge block is composed of two mutually isostructural semi-rings, and one end of each semi-ring is double card locking structure, and the other end is
Single deck tape-recorder locking structure, the single deck tape-recorder locking structure of a semi-ring are engaged with the double card locking structure of another semi-ring, form the upper continuous of the domain
Oil connection wedge block.
8. equal outer diameters external slips coiled tubing connector according to claim 5, which is characterized in that in the lower continuous oil
Zigzag structure, groove and one are successively machined on the inner wall of pipe fitting shell to Pyatyi step, the internal diameter of level-one step is less than
The internal diameter of the groove is machined with the screw hole for installing lower contact coiled tubing screw on the level-one step；Second level
The internal diameter of step is less than the internal diameter of the level-one step, is machined on the inner wall of the two stage steps and the lower coiled tubing
The internal screw thread that external screw thread in connection core pipe matches；The internal diameter of three-level step is less than the internal diameter of the two stage steps；Level Four platform
The internal diameter of rank is less than the internal diameter of the two stage steps and is greater than the internal diameter of the three-level step, on the inner wall of the level Four step
Processing is at least used for the annular seal groove of mounting O-shaped rings together, and the internal diameter of Pyatyi step is equal with the internal diameter of the two stage steps,
Internal screw thread is machined on the inner wall of the Pyatyi step.
9. equal outer diameters external slips coiled tubing connector according to claim 4, which is characterized in that the intermediate thread connects
Connector is cylindrical structure, and one is machined on the inner wall of the intermediate thread connector to Pyatyi step, the outer diameter of level-one step
It is equal with the internal diameter of level Four step of upper coiled tubing joint shell；The outer diameter of two stage steps is greater than the outer of the level-one step
Diameter is evenly distributed on the outer wall of the two stage steps and is machined with blind hole；The outer diameter of three-level step and the level-one step
Outer diameter is equal；The outer diameter of level Four step be less than the three-level step outer diameter, be machined on the outer diameter of the level Four step with
The external screw thread that the internal screw thread of the Pyatyi step of the lower coiled tubing joint shell matches；The outer diameter of Pyatyi step is less than described
The outer diameter of level Four step.
10. equal outer diameters external slips coiled tubing connector according to claim 9, which is characterized in that the intermediate rotation
Connector is cylindrical structure, and internal diameter gradually successively decreases one, two, three is successively machined on the inner wall of the intermediate rotary joint
The inner wall of rank, the level-one step of the intermediate rotary joint is taper, in the inner wall of the level-one step of the intermediate rotary joint
On be machined with the internal screw thread matched with the external screw thread of the level Four step of the upper coiled tubing joint shell；The intermediate rotation
The internal diameter of the two stage steps of connector is equal with the outer diameter of two stage steps of the intermediate thread connector, connects in the intermediate rotation
The position for corresponding to the blind hole in the two stage steps of head is threaded through-hole；The three-level step of the intermediate rotary joint
Internal diameter is equal with the outer diameter of three-level step of the intermediate thread connector, in the three-level step of the intermediate rotary joint
The annular seal groove for being at least used for mounting O-shaped rings together is machined on wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928197.5U CN209129544U (en) | 2018-11-22 | 2018-11-22 | Equal outer diameters external slips coiled tubing connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821928197.5U CN209129544U (en) | 2018-11-22 | 2018-11-22 | Equal outer diameters external slips coiled tubing connector |
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| Publication Number | Publication Date |
|---|---|
| CN209129544U true CN209129544U (en) | 2019-07-19 |
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ID=67246236
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821928197.5U Active CN209129544U (en) | 2018-11-22 | 2018-11-22 | Equal outer diameters external slips coiled tubing connector |
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| CN (1) | CN209129544U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209251A (en) * | 2018-11-22 | 2019-01-15 | 重庆科技学院 | Equal outer diameters external slips coiled tubing connector |
| CN111140180A (en) * | 2019-12-30 | 2020-05-12 | 宋楚晗 | Continuous oil pipe connector |
-
2018
- 2018-11-22 CN CN201821928197.5U patent/CN209129544U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209251A (en) * | 2018-11-22 | 2019-01-15 | 重庆科技学院 | Equal outer diameters external slips coiled tubing connector |
| CN109209251B (en) * | 2018-11-22 | 2023-09-12 | 重庆科技学院 | Constant-diameter external slip continuous oil pipe connector |
| CN111140180A (en) * | 2019-12-30 | 2020-05-12 | 宋楚晗 | Continuous oil pipe connector |
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