CN209556950U - The equal diameter drilling well coiled tubing connector of enlarged outside diameter - Google Patents

Abstract

The utility model provides a kind of equal diameter drilling well coiled tubing connector of enlarged outside diameter, including coiled tubing top connection assembly, coiled tubing lower contact assembly and transition joint assembly, coiled tubing top connection assembly and coiled tubing lower contact assembly are threaded in the both ends of transition joint assembly, collectively constitute an internal diameter coaxial cylinders equal with outer diameter.Coiled tubing top connection assembly includes upper seal nipple, top connection shell, the fixed taper slips of top connection, top connection activity taper slips and top connection connector；Transition joint assembly includes intermediate upper rotary joint and intermediate upper anchor tip；Coiled tubing lower contact assembly includes lower seal nipple, lower contact shell, the fixed taper slips of lower contact, lower contact activity taper slips and lower contact connector.The utility model has many advantages, such as that comprehensive strong, with strong points, pulling force and torque are big, has a wide range of application, structure is simple and convenient to operate, and the loss of circulation water power in coiled tubing is also effectively reduced on ground roller.

Description

The equal diameter drilling well coiled tubing connector of enlarged outside diameter

Technical field

The utility model belongs to Oil and Natural Gas Engineering technical field, more specifically, is related to a kind of enlarged outside diameter Equal diameter drilling well coiled tubing connector detains connection in the rotation of coiled tubing and coiled tubing, especially is needing to pass The underground work such as deep-well and the ultradeep well coiled tubing drilling of big axial tension and circumferential torque are passed, by the limit of highway transportation height It makes, coiled tubing length cannot be too long on single roller, when to deep-well and ultradeep well continuous oil pipe operation, need to connect multiple rollers Continuous oil pipe connects, and realizes the transmitting of the big pulling force and large torque between coiled tubing and coiled tubing；Simultaneously because continuous Oil pipe winds flecition on roller, leads to flow through the fluid secondary vortex flow easy to form of hydrophthalmia in coiled tubing, thus pole The earth increases on roller hydrophthalmia fluid circulation pressure consumption in coiled tubing, therefore from the angle for reducing roller cyclic pressure dissipation, needs The single long coiled tubing of roller is substituted for the short coiled tubing of multiple rollers and carries out underground work, reaches and ground roller is effectively reduced The purpose of cyclic pressure dissipation；In addition, the coiled tubing of (or underground) cannot rotate on roller, and between coiled tubing and coiled tubing Connection usually require to rotate button and be just able to achieve connection, it is therefore desirable to special connector can just be met the requirements；This connector Slips swelling is added using coiled tubing inner hole, is additional by way of the folding of cutting coiled tubing back and external slips locking, it is real The transmitting of now big axial tension is realized using slider mechanism and is detained in rotation when connecting, using lock-screw mechanism, spiral shell after upper button Large torque transmitting is realized in nail locking, the big axial tension between completion multistage coiled tubing, the company of button in the rotation of big circumferential torque It connects, to make it possible that coiled tubing completes a variety of underground work such as drilling well, complete well, well logging, the well workover of deep-well and ultradeep well.

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, slim-hole 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 following urgent problem in 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, these coiled tubing connectors are summed up, and can be divided into screw-type, slip-type, groove ring pressing type according to locking mode Deng.Screw-type and slip-type coiled tubing connector add screw to fix or slips are added to fix generally by coiled tubing outer wall Form, it is relatively simple for structure, load and unload more convenient, but be limited to the connection of coiled tubing and downhole tool mostly, it is main insufficient Place is:

(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, it is contemplated that meeting contraction distortion when coiled tubing compresses, therefore it is single Outer wall pressing force is restricted, and the torque and tensile stress of transmitting are smaller, is only applicable to the little well logging of down-hole string active force, gaslift The connection of the coiled tubing and downhole tool of equal operations, be not suitable for the biggish coiled tubing drilling of effect force request or deep-well and The operations such as ultradeep well；Most of screw-type connector is pivoted in connection procedure needs and is just able to achieve upper button connection simultaneously, when When coiled tubing is connect with coiled tubing, two connection coiled tubings cannot all rotate, therefore simple screw-type coiled tubing connects Connect the connection operation that device is not suitable for 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, equally by coiled tubing stress deformation the reason of, slips clamping force by Limit, 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 Coiled tubing and downhole tool connection, while most of slip-type connector needs to link closely around axial-rotation in connection procedure It is just 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 Simple slip-type coiled tubing connector is not suitable for the connection operation of coiled tubing and coiled tubing yet.

(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 grove shaped circumferential pressure type depends on the outer swelling pressure of inner wall tightly to generate mostly realizes the transmitting of torque and pulling force, rather than inside and outside Wall pressurizes simultaneously, it is contemplated that consumption of the coiled tubing dilatancy to pulling force and torque, the simple groove type are continuously oily Tube connector is also only applicable to the coiled tubing and downhole tool or continuous oil of the operations such as torque and little well logging, the gaslift of pulling force The connection of pipe, but it is not applicable to the bigger coiled tubing deep-well of pulling force and torque demand, ultradeep well or drillng operation.

To sum up, either screw-type, slip-type or groove ring pressure type, what these coiled tubing connectors can be provided Pulling force or torque are smaller, and while connecting much requires rotation and link closely to realize tightening for slips or screw, and coiled tubing Connection operation scene, by roller cannot rotate with the not revolvable limitation of underground continuous oil pipe, on connector between lower contact not Energy relative rotation causes the rotation of the needs such as most of screw-type, slip-type, groove ring pressing type to be linked closely and is just able to achieve connection Coiled tubing connector may not apply to connection between coiled tubing and coiled tubing or small part and can rotate connection, but The pulling force or torque that can be provided are all smaller, are not able to satisfy the coiled tubing deep-well bigger for pulling force and torque demand, surpass Deep-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 of big circumferential direction 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 equal diameter drilling well coiled tubing of enlarged outside diameter companies Device is connect, slips swelling, the additional side folded by cutting coiled tubing back and external slips are locked are added using coiled tubing inner hole Formula realizes the transmitting of big axial tension, is realized using slider mechanism and is detained in rotation when connecting, using lock-screw mechanism, on Screw is locked after button, realizes large torque transmitting, has that comprehensive strong, with strong points, pulling force and torque are big, have a wide range of application, tie Structure is simple and convenient to operate, and without traffic limitation is avoided after use, is also effectively reduced and is recycled in coiled tubing on ground roller Water power loss, so that coiled tubing be made to complete a variety of underground work such as drilling well, complete well, well logging, the well workover of deep-well and ultradeep well It is possibly realized.

In order to achieve the above object, the technical solution of design is as follows:

The equal diameter drilling well coiled tubing connector of enlarged outside diameter provided by the utility model, comprising: including for connecting The coiled tubing top connection assembly of upper coiled tubing, the coiled tubing lower contact assembly for connecting lower coiled tubing and in indirectly Head assembly, coiled tubing top connection assembly and coiled tubing lower contact assembly are threaded in the both ends of transition joint assembly, altogether With one internal diameter of composition coaxial cylinders equal with outer diameter；Wherein, coiled tubing top connection assembly include upper seal nipple, on connect Head shell, the fixed taper slips of top connection, top connection activity taper slips and top connection connector, the indentation of top connection connector connect In the inner hole of continuous oil pipe, upper seal nipple and top connection activity conic clamp watt-minute are not slided on coiled tubing, top connection shell Both ends be threaded on seal nipple and top connection connector, the fixed taper slip sleeve of top connection is mounted in top connection activity In annular space between taper slips and top connection shell；Transition joint assembly includes that intermediate upper rotary joint connects with fixation on centre Head, rotary joint slides over the freedom for being formed and being rotated about the axis on the periphery of anchor tip on centre by step on centre Pair, top connection connector are threaded on centre between rotary joint and intermediate upper anchor tip；Coiled tubing lower contact is total At include lower seal nipple identical with upper seal joint structure, lower contact shell identical with top connection shell mechanism, with it is upper The fixed taper slips of the identical lower contact of the fixed taper kava structure of connector, it is identical with top connection activity taper kava structure under Connector activity taper slips and lower contact connector, lower contact connector are threadedly coupled with the upper anchor tip in centre, and lower contact connects The end face and the upper rotary joint in centre for connecing device lean.

Furthermore it is preferred that scheme be that upper coiled tubing and lower coiled tubing respectively include the coiled tubing sheet of integral structure Body and coiled tubing cutting body, coiled tubing ontology are the coiled tubing not cut, and coiled tubing cutting body is by coiled tubing The axial uniformly distributed cutting of the lower end edge of ontology is formed, and is bent to the direction of coiled tubing ontology.

Additionally, it is preferred that scheme be that upper seal nipple is conically shaped, the shape of the upper end of conically shaped is taper, is being bored The lower end of shape cylinder is machined with one, two, three step that outer diameter successively decreases, and external screw thread is machined in two stage steps, in three-level platform It is machined with the annular seal groove for being at least used for mounting O-shaped rings together on rank, is axially inside machined with equal diameter in conically shaped Through-hole, processed on through-hole at least together be used for mounting O-shaped rings annular seal groove.

Furthermore Preferable scheme is that the outer diameter of top connection shell is identical as the maximum outside diameter of upper seal nipple, in top connection The inner circle of shell is successively machined with one, two, three, four step, the level-one step of top connection shell, two stage steps and three along axial direction The internal diameter of grade step gradually successively decreases, and the internal diameter of the level Four step of top connection shell is identical as the internal diameter of three-level step, in top connection The internal screw thread matched with the external screw thread of the two stage steps of upper seal nipple, top connection shell are machined on the level-one step of shell Two stage steps matched with the three-level step of upper seal nipple, be machined with interior spiral shell in the end of the level Four step of top connection shell Line.

Furthermore it is preferred that scheme be that the fixed taper slips of top connection is surrounded by the identical taper slips of three valve structures Columnar structured, columnar structured outer diameter is identical as the internal diameter of level Four step of top connection shell, in columnar structured The position that circle corresponds to coiled tubing ontology is machined with large scale taper slips, corresponds to continuous oil in columnar structured inner circle The position of pipe cutting body is machined with small size taper slips.

Additionally, it is preferred that scheme be, columnar structured length be less than top connection shell level Four step length, small ruler The outer diameter that the minimum diameter of very little taper slips is formed after bending with coiled tubing cutting body to the direction of coiled tubing ontology is equal, Small size taper slips is less than the length that coiled tubing cutting body is bent to the direction of coiled tubing ontology along the length of axis.

Furthermore Preferable scheme is that top connection activity taper slips is that there are three types of the cylinders of the conical surface for processing, in cylinder Disc is machined with fine taper slips in top connection activity, is machined with respectively and the fixed taper slips of top connection in the periphery of cylinder The top connection activity locking auger shape slips that matches of large scale taper slips and small ruler with the fixed taper slips of top connection The top connection activity necking down fine taper slips that very little taper slips matches.

Furthermore it is preferred that scheme be that top connection connector includes the top connection CT clamping core pipe and top connection of integral structure Connector body, top connection CT clamping core pipe is inserted in coiled tubing ontology and is interference fitted with coiled tubing ontology, upper Two ends of splice connector body are machined with two sections of external screw threads, one section of external screw thread therein and the four of top connection shell respectively The internal screw thread of grade step tail end matches, and the middle part of top connection connector body has a boss, outside the outer diameter of boss and top connection The outer diameter of shell is equal, is machined with one section of widened step of internal diameter in the inner headed face of top connection connector body；Lower contact connector Lower contact CT clamping core pipe and lower contact connector body including integral structure, lower contact CT clamping core pipe are inserted in continuous oil It is interference fitted in tube body and with coiled tubing ontology, close to the one of lower contact CT clamping core pipe on lower contact connector body End is machined with the external screw thread matched with the internal screw thread of the level Four step tail end of lower contact shell, in lower contact connector body Inner headed face is machined with level-one step and two stage steps, and the internal diameter of level-one step is greater than the internal diameter of two stage steps, on level-one step It is machined with internal screw thread.

Additionally, it is preferred that scheme be that rotary joint includes rotating to connect on intermediate upper rotary joint ontology and centre on centre Head fixed screw, the inner headed face of rotary joint ontology is machined with one, two, three step on centre, the rotary joint on centre It is machined with the internal screw thread matched with another section on top connection connector body of external screw thread on the level-one step of ontology, in centre Four are evenly distributed on upper rotary joint ontology for installing the screwing through hole of rotary joint fixed screw on centre.

Furthermore Preferable scheme is that anchor tip is successively machined with fixation on the centre that outer diameter does not wait along axial direction on centre Ring packing step on connector, anchor tip step on centre, anchor tip locking step on centre, anchor tip chain on centre Ring packing step under consecutive rank and intermediate upper anchor tip, on centre on anchor tip the outer diameter of ring packing step with above connect The internal diameter of the step of the inner headed face of head connector ontology is equal, the outer diameter of anchor tip step and intermediate upper rotary joint on centre The internal diameter of the second step of ontology is equal, and ring packing step and annular under the upper anchor tip in centre are close on anchor tip on centre Envelope step processes the both ends of the anchor tip on centre respectively, on centre on anchor tip on ring packing step and on centre Circumferentially it is machined with the annular seal groove for being at least used for mounting O-shaped rings together under anchor tip on ring packing step respectively；In The locking being machined with for installing anchor tip lock-screw on centre is evenly distributed on anchor tip locking step on centre Blind hole；It is machined on anchor tip link step on centre and is matched with the internal screw thread of the level-one step of lower contact connector body External screw thread.

Compared with prior art, the equal diameter drilling well coiled tubing connector of enlarged outside diameter provided by the utility model can Obtain following technical effect:

1, comprehensive strong: the connector includes three kinds of connection types such as screw-type, slip-type, groove ring pressure type, comprehensive Property is strong；

2, 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；

3, pulling force is big, torque is big: can not only transmit big pulling force, while can also transmit big torque, be conducive to reality Existing multiple-roll coiled tubing connection drilling, effectively reduces the length of single roller coiled tubing, to substantially reduce because of roller Cyclic pressure dissipation brought by too long；

4, 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；

5, traffic limitation is avoided；

6, the water power loss for effectively reducing ground coiled tubing, is conducive to execute-in-place；

7, structure is simple, easy to operate: the connector is made of three main components, can both be connect by rotating on centre Head assembly realizes rotation connection, and can be locked by rotary joint fixed screw on centre, realizes large torque transmitting, structure letter Single, complicated process, not 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 semi-section structural representation of the equal diameter drilling well coiled tubing connector of the enlarged outside diameter of the utility model Figure；

Fig. 2 is the semi-section structural schematic diagram of the coiled tubing top connection assembly of the utility model；

Fig. 3 is the semi-section structural schematic diagram of the transition joint assembly of the utility model；

Fig. 4 is the half section structure diagram of the coiled tubing lower contact assembly of the utility model；

Fig. 5 a is that the upper coiled tubing of the utility model cuts envelope expansion main view diagrammatic cross-section；

Fig. 5 b is that the upper coiled tubing of the utility model cuts envelope overturning main view diagrammatic cross-section；

Fig. 5 c is that the upper coiled tubing of the utility model cuts envelope expansion schematic side view

Fig. 6 is the half-section diagram of the upper seal nipple of the utility model；

Fig. 7 is the half-section diagram of the top connection shell of the utility model；

Fig. 8 a is the half-sectional schematic front view of the fixed taper slips of top connection of the utility model；

Fig. 8 b is the half-sectional right side view of the fixed taper slips of top connection of the utility model；

Fig. 9 is the half-sectional schematic front view of the top connection activity taper slips of the utility model；

Figure 10 is the half-sectional schematic front view of the top connection connector of the utility model；

Figure 11 is the half-sectional schematic front view of the lower contact connector of the utility model；

Figure 12 a is the schematic front view that rotary joint is half-sectional on the centre of the utility model；

Figure 12 b is the schematic cross-sectional view of the Section A-A along Figure 12 a；

Figure 13 is the semi-section structural schematic diagram of anchor tip on the centre 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 Head assembly, the upper coiled tubing of 11-, the upper coiled tubing ontology of 111-, the upper coiled tubing cutting body of 112-, the upper seal nipple of 12-, 13- top connection shell, the fixed taper slips of 14- top connection, 15- top connection activity taper slips, 151- top connection activity locking Big taper slips, 152- top connection activity necking down fine taper slips, fine taper slips, 16- top connection in 153- top connection activity Connector, 161- top connection CT clamping core pipe, 162- top connection top bar screw thread, 163- top connection connector body, on 164- Connector get out of a predicament or an embarrassing situation screw thread, rotary union assembly on the centre 21-, rotary joint ontology on the centre 211-, rotate and connect on the centre 212- Head fixed screw, anchor tip on centre 22-, ring packing step on anchor tip, fixation on the centre 222- on the centre 221- On connector step, the centre 223- anchor tip locking step, the upper anchor tip in centre 224- link step, fixation on the centre 225- Seal nipple, 33- lower contact shell, 34- lower contact fixed cone under coiled tubing, 32- under ring packing step, 31- under connector Shape slips, 35- lower contact activity taper slips, 36- lower contact connector, 361- lower contact CT clamping core pipe, 362- lower contact Step screw thread, 363- lower contact connector body.

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.

As shown in Figure 1, the equal diameter drilling well coiled tubing connector of the enlarged outside diameter of the utility model, comprising: continuous oil Pipe top connection assembly 1, transition joint assembly 2 and coiled tubing lower contact assembly 3, coiled tubing top connection assembly 1 and continuous oil Pipe lower contact assembly 3 is threaded in the both ends of transition joint assembly 2 respectively, collectively constitutes equal coaxial of an internal-and external diameter Cylinder, coiled tubing top connection assembly 1 is for connecting coiled tubing 11, and coiled tubing lower contact assembly 3 under connecting for connecting Continuous oil pipe 31.

As shown in Fig. 1,2,5a, 5b, 5c, upper coiled tubing 11 is coiled tubing connecting pin, by the upper continuous of integral structure Oil pipe ontology 111 and upper 112 two parts of coiled tubing cutting body composition, upper coiled tubing ontology 111 be do not cut it is continuous Oil pipe, upper coiled tubing cutting body 112 are uniformly to cut the tail end of upper coiled tubing ontology 111 along axial direction with abrasive wheel cutting machine Be cut into 8 equal portions, and the direction bending of coiled tubing ontology 111 upwards, for increase coiled tubing connector axial load and Torque.

The structure of lower coiled tubing 31 is identical as the structure of upper coiled tubing 11, and lower coiled tubing 31 includes lower coiled tubing Ontology and lower coiled tubing cutting body, the structure of lower coiled tubing ontology is identical as the structure of upper coiled tubing ontology 111, lower company The structure of continuous oil pipe cutting body is identical as the structure of upper coiled tubing cutting body 112.

As shown in Fig. 2, coiled tubing top connection assembly 1 includes: that upper seal nipple 12, top connection shell 13, top connection are solid Determine taper slips 14, top connection activity taper slips 15, top connection connector 16；Wherein, upper seal nipple 12 with outside top connection The threaded one end of shell 13 connects, and the other end of top connection shell 13 is threadedly coupled with top connection connector 16, upper seal nipple 12 It is slided on upper coiled tubing 11 together with top connection activity taper slips 15, the fixed taper slips 14 of top connection, which is sleeved on, to be connect In annular space between head activity taper slips 15 and top connection shell 13, top connection connector 16 is pressed into upper coiled tubing 11 Kong Zhong.

As shown in Fig. 1,2,6, upper seal nipple 12 generally taper barrel shape, the shape of the upper end of conically shaped is cone Shape is machined with one, two, three step that outer diameter successively decreases in the lower end of conically shaped, external screw thread, In is machined in two stage steps The annular seal groove for being at least used for mounting O-shaped rings together is machined on three-level step, in being axially inside machined with for conically shaped Isodiametric through-hole processes the annular seal groove for being at least used for mounting O-shaped rings together on through-hole.

As shown in Fig. 1,2,7, the generally cylindrical shape of top connection shell 13, the outer diameter of cylinder and upper seal nipple 12 Maximum outside diameter is identical, and one, two, three, four step, top connection shell are successively machined with along axial direction in the inner circle of top connection shell 13 The internal diameter of 13 level-one step, two stage steps and three-level step gradually successively decreases, the internal diameter of the level Four step of top connection shell 13 with The internal diameter of three-level step is identical, is machined on the level-one step of top connection shell 13 and the two stage steps of upper seal nipple 12 The internal screw thread that external screw thread matches, the two stage steps of top connection shell 13 are matched with the three-level step of upper seal nipple 12, In The end of the level Four step of top connection shell 13 is machined with internal screw thread.

As shown in Fig. 1,2,8a, 8b, the fixed taper slips 14 of top connection is by the identical taper slips group of three valve structures At three valve taper slips are grouped together into columnar structured, a columnar structured outer diameter and top connection shell 13 The internal diameter of level Four step is identical, and columnar structured length is less than the length of the level Four step of top connection shell 13, in cylindrical shape The position that the inner circle of structure corresponds to upper coiled tubing ontology 111 is machined with large scale taper slips, in columnar structured The position that circle corresponds to upper coiled tubing cutting body 112 is machined with small size taper slips, in the minimum of small size taper slips The outer diameter formed after diameter and the bending of the direction of the upward coiled tubing ontology 111 of upper coiled tubing cutting body is equal, small size taper Slips is slightly less than the length of the direction bending of the upward coiled tubing ontology 111 of upper coiled tubing cutting body 112 along the length of axis Degree prevents coiled tubing cutting body 112 from slipping, increases axial tension and axially turn round for compressing coiled tubing cutting body 112 Square.

As shown in Fig. 1,2,9, the main body of top connection activity taper slips 15 is that there are three types of the cylinders of the conical surface for processing, in cylinder Disc is machined with fine taper slips 153 in top connection activity；Cylinder periphery upper end is machined with and the fixed taper slips of top connection Auger shape slips 151 is locked in the large scale taper anchor ring top connection activity that 14 upper end inner cone discs match；Under cylinder periphery End is machined with reversed small size taper anchor ring top connection activity necking down fine taper slips 152, fine taper slips in top connection activity 153 are mounted between coiled tubing ontology 111 and upper coiled tubing cutting body 112, fine taper slips in top connection activity 153 along the length of axis and the equal length of coiled tubing cutting body 112.

As shown in Fig. 1,2,10, the generally cylinder of top connection connector 16, by the top connection CT clamping core of integral structure Pipe 161 and top connection connector body 163 are constituted, and top connection CT clamping core pipe 161 is inserted in coiled tubing ontology 111 And be interference fitted with upper coiled tubing ontology 111, it is machined with outside two sections respectively in two ends of top connection connector body 163 Screw thread, respectively top connection top bar screw thread 162 and top connection are got out of a predicament or an embarrassing situation screw thread 164, top connection top bar screw thread 162 with it is upper The internal screw thread of the level Four step tail end of joint shell 13 matches, and the middle part of top connection connector body 163 has boss, boss Diameter it is equal with the outer diameter of top connection shell 13, be machined with one section of internal diameter in the inner headed face of top connection connector body 163 and expand Big step.

As shown in figure 4, coiled tubing lower contact assembly 3 includes: that lower seal nipple 32, lower contact shell 33, lower contact are solid Determine taper slips 34, lower contact activity taper slips 35, lower contact connector 36；Wherein, lower seal nipple 32 with outside lower contact The threaded one end of shell 33 connects, and the other end of lower contact shell 33 is threadedly coupled with lower contact connector 36, lower seal nipple 32 It is slided on lower coiled tubing 31 together with lower contact activity taper slips 35, the fixed taper slips 34 of lower contact, which is sleeved on down, to be connect In annular space between head activity taper slips 35 and lower contact shell 33, lower contact connector 36 is pressed into lower coiled tubing 31 In inner hole.

The structure of lower seal nipple 32 is identical as the structure of upper seal nipple 12.

The structure of lower contact shell 33 is identical as the structure of lower contact shell 13.

The structure of the fixed taper slips 34 of lower contact is identical as the fixed structure of taper slips 14 of top connection.

The structure of lower contact activity taper slips 35 is identical as the structure of top connection activity taper slips 15, lower contact activity Taper slips 35 includes lower contact activity taper slips, lower contact activity locking auger shape slips, lower contact activity necking down conelet Fine taper slips in shape slips and lower contact activity.

As shown in figure 11, lower contact connector 36 includes that the lower contact CT clamping core pipe 361 of integral structure and lower contact connect Device ontology 363 is connect, lower contact CT clamping core pipe 361 is inserted in lower coiled tubing ontology and matches with lower coiled tubing ontology interference It closes, one end on lower contact connector body 363 close to lower contact CT clamping core pipe 361 is machined with and lower contact shell 33 The lower contact step screw thread 362 that the internal screw thread of level Four step tail end matches, adds in the inner headed face of lower contact connector body 363 Work has level-one step and two stage steps, and the internal diameter of level-one step is greater than the internal diameter of two stage steps, is machined on level-one step interior Screw thread.

As shown in Figure 1,3, transition joint assembly 2 includes: rotary union assembly 21 and intermediate upper anchor tip 22 on centre, Rotary union assembly 21 is slided over by step and forms oneself rotated about the axis on centre on 22 periphery of anchor tip on centre By pair.

As shown in Fig. 1,3,12a, 12b, rotary union assembly 21 includes intermediate upper rotary joint ontology 211 on centre Between upper rotary joint fixed screw 212, rotary joint ontology 211 is a cylinder on centre, and the inner headed face of cylinder is machined with internal diameter The outer diameter of one, two, three step being gradually reduced, cylinder is equal with the outer diameter of top connection connector body 163, for the continuous oil The outer diameter of tube connector；It is machined on the level-one step of rotary joint ontology 163 on centre and gets out of a predicament or an embarrassing situation screw thread 164 with top connection The internal screw thread matched；Position on centre on rotary joint ontology by caudal part is evenly distributed four screwing through hole, uses In the intermediate upper rotary joint fixed screw 212 of installation.

As shown in Fig. 1,3,13, the generally cylinder of anchor tip 22 on centre, the diameter of the inner via hole of cylinder with above connect The internal diameter of head CT clamping core pipe 161 is equal, is equal to the internal diameter of the coiled tubing connector；The outer circle of cylinder successively adds along axial direction The Pyatyi step that work has outer diameter not equal, ring packing step 221 on respectively intermediate upper anchor tip, anchor tip platform on centre Ring under anchor tip is gone up in anchor tip locking step 223, the upper anchor tip link step 224 in centre and centre on rank 222, centre Shape sealed step 225, on centre on anchor tip the outer diameter of ring packing step 221 and top connection connector body 163 it is interior The internal diameter of the step of disc is equal, and ring packing step 221 and annular under the upper anchor tip in centre are close on anchor tip on centre Envelope step 225 processes the both ends of the anchor tip 22 on centre respectively, on centre on anchor tip on ring packing step 221 Be circumferentially machined with respectively on ring packing step 225 under anchor tip on centre at least together be used for mounting O-shaped rings ring Shape seal groove；The internal diameter of the second step of the outer diameter of anchor tip step 222 and intermediate upper rotary joint ontology 211 on centre It is equal；It is evenly distributed to be machined on anchor tip locking step 223 on centre and be locked for installing anchor tip on centre The locking blind hole of screw；It is machined with external screw thread on anchor tip link step 224 on centre, the external screw thread and lower contact connector The internal screw thread of the level-one step of ontology 363 matches, and anchor tip link step 224 plays the role of connection on centre.

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: a roller coiled tubing of often going into the well, it can be quick by this coiled tubing connector Next roller coiled tubing is connected, the operating process of two sections of coiled tubings connection is as follows:

Step 1: connection coiled tubing top connection assembly 1:

(1) after upper 12 inner hole of seal nipple loads onto O-ring, suitable position on coiled tubing 11 is slided over；

(2) top connection shell 13 is slided over into suitable position on upper coiled tubing 11；

(3) top connection activity taper slips 15 is slided over into suitable position on upper coiled tubing 11, top connection will be stretched out After 11 top of upper coiled tubing of activity taper slips 15 is cut into the shape of coiled tubing cutting body 112, and it is bent by after, Coiled tubing cutting body 112 is set to be adjacent to top connection activity necking down fine taper slips 152；

(4) the fixed taper slips 14 of three valve top connections is pressed on to the male cone (strobilus masculinus) of top connection activity taper slips 15 respectively On, so that the auger face of fixed 14 upper end of taper slips of three valve top connections is pressed on top connection activity locking auger shape slips 151 big Cylindrical structure is formed on the conical surface, then top connection shell 13 is slided in the cylindrical structure；

(5) the top connection CT clamping core pipe 161 on top connection connector 16 is inserted into upper coiled tubing ontology 111 Kong Zhong screws the external screw thread of top connection top bar screw thread 162 with the internal screw thread of 13 lower end of top connection shell and connect；

(6) load onto O-ring in the outer circle of upper seal nipple 12, and slide upper seal nipple 12, make its external screw thread with it is upper The internal screw thread of joint shell 13 screws connection.

Step 2: connection coiled tubing lower contact assembly 3:

Connection type is with reference to connection coiled tubing top connection assembly 1；

(1) after the inner hole mounting O-shaped rings of lower seal nipple 32, suitable position on lower coiled tubing 31 is slided over；

(2) lower contact shell 33 is slided over into suitable position on lower coiled tubing 31；

(3) top for stretching out the lower coiled tubing 31 of lower contact activity taper slips 35 lower coiled tubing is cut into cut It after cutting the shape of body, and is bent by after, lower coiled tubing cutting body is made to be adjacent to lower contact activity necking down fine taper slips；

(4) the fixed taper slips 34 of three valve lower contacts is pressed on to the male cone (strobilus masculinus) of lower contact activity taper slips 35 respectively On, so that the auger face of fixed 34 lower end of taper slips of three valve lower contacts is pressed on the lower contact activity locking big conical surface of auger shape slips Upper formation cylindrical structure, then lower contact shell 33 is slided in the cylindrical structure；

(5) the lower contact CT clamping core pipe 361 on lower contact connector 36 is inserted into lower coiled tubing ontology 311 Kong Zhong screws the external screw thread of lower contact top bar screw thread 362 with the internal screw thread of 33 upper end of lower contact shell and connect；

(6) mounting O-shaped rings in lower 32 upper end outer circle of seal nipple, and slide lower seal nipple 32, make its external screw thread with The internal screw thread of lower contact shell 33 screws connection.

Step 3: connection transition joint assembly 2:

(1) rotary union assembly 21 on centre is slided on centre on anchor tip 22, and goes up rotary joint with centre Fixed screw 212 is locked, and transition joint assembly 2 is formed；

(2) ring packing step 225 under anchor tip upper among 22 lower end of anchor tip on centre is loaded into O-ring, led to Upper anchor tip link 224 external screw thread of screw thread is screwed with 33 upper end internal screw thread of lower contact shell among crossing connect, in completion indirectly The connection of head assembly 2 and coiled tubing lower contact assembly 3；

(3) rotary joint fixed screw 212 on the centre on transition joint assembly 2 is dismantled；

(4) by ring packing step 221 loads onto O-ring on anchor tip on the centre of 22 upper end of anchor tip on centre Afterwards, the intermediate upper rotary joint ontology 211 of rotation makes the internal screw thread of 211 upper end of rotary joint ontology and top connection on centre leave office Rank screw thread 164 screws connection, completes the connection of transition joint assembly 2 and coiled tubing top connection assembly 1；

(5) rotary joint fixed screw 212 on the centre on transition joint assembly 2 is tightened, realizes coiled tubing top connection The torque transmitting of assembly 1, transition joint assembly 2, coiled tubing lower contact assembly 3, connection are completed.

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: six → Five → tetra- → tri- → bis- → mono-) → (step 1: six → five → tetra- → tri- → 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 diameter drilling well coiled tubing connector of enlarged outside diameter, which is characterized in that including for connecting upper continuous oil The coiled tubing top connection assembly of pipe, coiled tubing lower contact assembly and transition joint assembly for connecting lower coiled tubing, The coiled tubing top connection assembly and the coiled tubing lower contact assembly are threaded in the two of the transition joint assembly End, collectively constitutes an internal diameter coaxial cylinders equal with outer diameter；Wherein,

The coiled tubing top connection assembly includes upper seal nipple, top connection shell, top connection fixed taper slips, top connection Activity taper slips and top connection connector, the top connection connector are pressed into the inner hole of the coiled tubing, described close Sealing joint and the top connection activity conic clamp watt-minute do not slide on the coiled tubing, the both ends spiral shell of the top connection shell Line is connected on the upper seal nipple and the top connection connector, and the fixed taper slip sleeve of the top connection is mounted on described In annular space between connector activity taper slips and the top connection shell；

The transition joint assembly includes intermediate upper rotary joint and intermediate upper anchor tip, and rotary joint passes through on the centre Step, which slides over to be formed on the periphery of anchor tip on the centre, rotates about the axis freely secondary, the top connection connector It is threaded on the centre on rotary joint and the centre between anchor tip；

The coiled tubing lower contact assembly include lower seal nipple identical with the upper seal joint structure, with it is described on connect The identical lower contact shell of head shell mechanism, the fixed conic clamp of lower contact identical with the fixed taper kava structure of the top connection Watt, lower contact activity taper slips identical with the top connection activity taper kava structure and lower contact connector, under described Anchor tip is threadedly coupled on joint connector and the centre, is rotated on the end face and the centre of the lower contact connector Connector leans.

2. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 1, which is characterized in that on described Coiled tubing and the lower coiled tubing respectively include the coiled tubing ontology and coiled tubing cutting body of integral structure, the company Continuous oil pipe ontology is the coiled tubing not cut, the coiled tubing cutting body by the coiled tubing ontology lower end edge axis It is formed to uniformly distributed cutting, and is bent to the direction of the coiled tubing ontology.

3. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 2, which is characterized in that on described Seal nipple is conically shaped, and the shape of the upper end of the conically shaped is taper, is machined in the lower end of the conically shaped outer One, two, three step that diameter successively decreases, is machined with external screw thread in two stage steps, is machined on three-level step and at least uses together In the annular seal groove of mounting O-shaped rings, it is axially inside machined with isodiametric through-hole in the conically shaped, in the through-hole Upper processing is at least used for the annular seal groove of mounting O-shaped rings together.

4. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 3, which is characterized in that on described The outer diameter of joint shell is identical as the maximum outside diameter of the upper seal nipple, the top connection shell inner circle along axial direction successively It is machined with one, two, three, four step, the internal diameter of the level-one step of the top connection shell, two stage steps and three-level step is gradually Successively decrease, the internal diameter of the level Four step of the top connection shell is identical as the internal diameter of the three-level step, in the top connection shell Level-one step on be machined with the internal screw thread matched with the external screw thread of the two stage steps of the upper seal nipple, the top connection The two stage steps of shell are matched with the three-level step of the upper seal nipple, at the end of the level Four step of the top connection shell End is machined with internal screw thread.

5. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 4, which is characterized in that on described The fixed taper slips of connector be surrounded by the identical taper slips of three valve structures it is columnar structured, it is described columnar structured outer Diameter is identical as the internal diameter of level Four step of the top connection shell, corresponds to the continuous oil in the columnar structured inner circle The position of tube body is machined with large scale taper slips, cuts in the columnar structured inner circle corresponding to the coiled tubing The position of body is machined with small size taper slips.

6. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 5, which is characterized in that the circle The length of tubular construction is less than the length of the level Four step of the top connection shell, the minimum diameter of the small size taper slips The outer diameter formed after bending with the coiled tubing cutting body to the direction of the coiled tubing ontology is equal, the small size cone Shape slips is less than the length that the coiled tubing cutting body is bent to the direction of the coiled tubing ontology along the length of axis.

7. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 5, which is characterized in that on described Connector activity taper slips is processing there are three types of the cylinder of the conical surface, is machined in the inner headed face of the cylinder small in top connection activity Taper slips is machined with the large scale taper slips with the fixed taper slips of the top connection in the periphery of the cylinder respectively The top connection activity locking auger shape slips matched and the small size taper slips phase with the fixed taper slips of the top connection The top connection activity necking down fine taper slips of cooperation.

8. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 4, which is characterized in that on described Joint connector includes the top connection CT clamping core pipe and top connection connector body of integral structure, the top connection CT clamping core Pipe is inserted in the coiled tubing ontology and is interference fitted with the coiled tubing ontology, in the top connection connector body Two ends be machined with two sections of external screw threads, the level Four step tail end of one section of external screw thread therein and the top connection shell respectively Internal screw thread match, the middle part of the top connection connector body has boss, the outer diameter of the boss and the top connection The outer diameter of shell is equal, is machined with one section of widened step of internal diameter in the inner headed face of the top connection connector body；

The lower contact connector includes the lower contact CT clamping core pipe and lower contact connector body of integral structure, is connect under described Head CT clamping core pipe is inserted in the coiled tubing ontology and is interference fitted with the coiled tubing ontology, in the lower contact One end on connector body close to the lower contact CT clamping core pipe is machined with the level Four step tail with the lower contact shell The external screw thread that the internal screw thread at end matches is machined with level-one step and second level platform in the inner headed face of the lower contact connector body Rank, the internal diameter of the level-one step are greater than the internal diameter of the two stage steps, are machined with internal screw thread on the level-one step.

9. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 8, which is characterized in that in described Between upper rotary joint include intermediate upper rotary joint ontology and intermediate upper rotary joint fixed screw, rotate and connect on the centre The inner headed face of head ontology is machined with one, two, three step, is machined on the level-one step of rotary joint ontology on the centre The internal screw thread matched with another section on the top connection connector body of external screw thread, the rotary joint ontology on the centre On be evenly distributed four for installing the screwing through hole of rotary joint fixed screw on the centre.

10. the equal diameter drilling well coiled tubing connector of enlarged outside diameter according to claim 9, which is characterized in that described Anchor tip is successively machined on the centre that outer diameter does not wait ring packing step on anchor tip along axial direction, consolidates on centre on centre Determine that connector step, ring under anchor tip is gone up in anchor tip locking step, the upper anchor tip link step in centre and centre on centre Shape sealed step, on the centre on anchor tip the outer diameter of ring packing step and the top connection connector body inner circle The internal diameter of the step in face is equal, on the centre on the outer diameter of anchor tip step and the centre rotary joint ontology second The internal diameter of step is equal, ring packing under anchor tip on ring packing step and the centre on anchor tip on the centre Step processes the both ends of the anchor tip on the centre respectively, on the centre on anchor tip on ring packing step with Circumferentially it is machined with the annular for being at least used for mounting O-shaped rings together on the centre under anchor tip on ring packing step respectively Seal groove；It is evenly distributed to be machined on anchor tip locking step on the centre and be locked for installing anchor tip on centre The locking blind hole of tight screw；The level-one platform with the lower contact connector body is machined on centre on anchor tip link step The external screw thread that the internal screw thread of rank matches.