CN109372444A - Double lead petroleum casing screws bindiny mechanism and its casing tubing string - Google Patents
Double lead petroleum casing screws bindiny mechanism and its casing tubing string Download PDFInfo
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- CN109372444A CN109372444A CN201811553120.9A CN201811553120A CN109372444A CN 109372444 A CN109372444 A CN 109372444A CN 201811553120 A CN201811553120 A CN 201811553120A CN 109372444 A CN109372444 A CN 109372444A
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- 239000003208 petroleum Substances 0.000 title claims abstract description 41
- 230000007246 mechanism Effects 0.000 title claims abstract description 40
- 238000007789 sealing Methods 0.000 claims description 27
- 230000007704 transition Effects 0.000 claims description 23
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/08—Casing joints
Abstract
The present invention provides a kind of double lead petroleum casing screws bindiny mechanism and its casing tubing string, double lead petroleum casing screws bindiny mechanism includes: the internal thread part and internal torque shoulder for being formed in first tubular part one end, the internal thread part has the internal screw thread of predetermined taper, the internal screw thread is double lead threads, the internal screw thread has multiple partially trapezoidal internal screw thread teeth, and the guide surface angle of the internal screw thread tooth is greater than the loading end angle of the internal screw thread tooth；Be formed in second tubular part one end external thread part and outer torque shoulder, the external thread part has the external screw thread of taper identical as the internal thread part, the external screw thread is double lead threads, the external screw thread has multiple partially trapezoidal external screw thread teeth, and the guide surface angle of the external screw thread tooth is greater than the loading end angle of the external screw thread tooth.Double lead petroleum casing screws bindiny mechanism provided by the invention and its casing tubing string, reliable performance and are able to achieve quick twist-on, to greatly improve operation timeliness.
Description
Technical field
The present invention relates to joint coating on pipeline technical field more particularly to a kind of double lead petroleum casing screws bindiny mechanism and its
Casing tubing string.
Background technique
The description of this part, which is only provided, discloses relevant background information to the present invention, without constituting the prior art.
With rapid development of economy, China is continuously increased the demand of petroleum.The drilling development rate in oil field is more next
It is faster, it how to be the key problem that oil development faces in oil field prospecting and exploitation cost efficiency.Currently, solving how to improve oil
Field exploration and recovery process in cost efficiency the problem of effective means first is that: pass through improve operation timeliness.
During oil exploitation, the tripping in casing tubing string in well is needed.Currently, casing tubing string is using the side being threadedly coupled
Single casing is connected in sequence by formula.Wherein, the timeliness of threaded connection is to control the key link of casing job timeliness.And
Traditional API threaded sleeve is designed using single line structure, make-up speed is slow, the machine tight time is long, to affect operation timeliness.
Therefore, a kind of reliable performance is urgently provided at present and is able to achieve the petroleum casing screw connection type of quick twist-on,
To improve operation timeliness.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
Based on prior art defect above-mentioned, this application provides a kind of double lead petroleum casing screws bindiny mechanism and its
Casing tubing string, reliable performance and is able to achieve quick twist-on, to greatly improve operation timeliness.
To achieve the goals above, the present invention provides the following technical solutions.
A kind of double lead petroleum casing screws bindiny mechanism, comprising:
It is formed in the internal thread part and internal torque shoulder of first tubular part one end, the internal thread part has predetermined taper
Internal screw thread, the internal screw thread is double lead threads, and the internal screw thread has multiple partially trapezoidal internal screw thread teeth, the internal screw thread
The guide surface angle of tooth is greater than the loading end angle of the internal screw thread tooth；
Be formed in second tubular part one end external thread part and outer torque shoulder, the external thread part have with it is described interior
The external screw thread of the identical taper of screw thread, the external screw thread are double lead threads, and the external screw thread has multiple partially trapezoidal external screw threads
Tooth, the guide surface angle of the external screw thread tooth are greater than the loading end angle of the external screw thread tooth.
In one preferred embodiment, it is provided with inner sealing surface between the internal screw thread and the internal torque shoulder,
External seal face is provided between the external screw thread and the outer torque shoulder, the inner sealing surface can be sealed with the external seal face
Cooperation.
In one preferred embodiment, double lead threads include the first helix and the second helix, described
First helix has the first cutting point, and second helix has the second cutting point, first cutting point and described the
Two cutting points along the internal screw thread or the distance of the externally threaded axis direction interval half pitch, first helix
Lead and the lead of second helix are twice of the screw pitch.
In one preferred embodiment, the guide surface of the guide surface angle of the internal screw thread tooth and the external screw thread tooth
Angle is 15 degree to 45 degree, and the loading end angle of the loading end angle of the internal screw thread tooth and the external screw thread tooth is 0 degree
To 3 degree.
In one preferred embodiment, the predetermined taper is 1:16.
In one preferred embodiment, in the state of the internal screw thread and the external screw thread, the interior spiral shell
The guide surface of line can be interference fitted with the externally threaded guide surface.
In one preferred embodiment, between the internal torque shoulder and the axis direction of first tubular part
Angle be 85 degree to 90 degree, the angle between the outer torque shoulder and the axis direction of second tubular part is 85 degree
To 90 degree.
In one preferred embodiment, there is interior shoulder transition between the inner sealing surface and the internal torque shoulder
Face, has an outer shoulder transition face between the external seal face and the outer torque shoulder, the interior shoulder transition face and described outer
Shoulder transition face matches.
In one preferred embodiment, escape is provided between the internal screw thread and the inner sealing surface.
A kind of casing tubing string, comprising: multiple casings are connected with box cupling between two neighboring described sleeve pipe, described sleeve pipe with
Any of the above-described double lead petroleum casing screws bindiny mechanism is formed between the box cupling.
Double lead petroleum casing screws bindiny mechanism of embodiment of the present invention and its casing tubing string, by the first tubulose
It is provided with double lead internal screw threads on the inner wall of component one end (such as box cupling), (such as casing connects in second tubular part one end
Head) lateral wall on be provided with double lead external screw threads, when the two Matching installation, can be realized on quickly using double lead helical structures
Button, make-up speed are promoted to 200% than traditional API screw thread make-up speed, and twist-on can be completed in 2 circle of present invention rotation；In addition,
It is guide surface angle in conjunction with its internal screw thread tooth, external screw thread tooth since the internal screw thread and external screw thread all have scheduled taper
Partially trapezoidal internal screw thread tooth, partially trapezoidal external screw thread tooth greater than loading end angle when make-up, can be realized quick make-up and enter
Button greatly reduced the entire upper button time on the whole, and improved operation timeliness.
It was verified that embodiment of the present invention double lead petroleum casing screws bindiny mechanism and its casing tubing string with it is existing
Technology is compared, and is had the following beneficial effects:
(1) internal screw thread and external screw thread are all made of double lead threads, and make-up speed is mentioned than traditional API screw thread make-up speed
200% is risen to, the 2 achievable twist-ons of circle are rotated between internal screw thread and external screw thread, the button time are substantially reduced, when improving operation
Effect；
(2) the internal screw thread tooth of the internal screw thread and externally threaded external screw thread tooth are all made of partially trapezoidal screw thread dental structure, for example,
The loading end angle of internal screw thread tooth and the loading end angle of external screw thread tooth are 0.5 °, the guide surface angle of internal screw thread tooth and outer spiral shell
The guide surface angle of line tooth is 35 °, the taper of the internal screw thread and externally threaded taper be 1:16, it can be achieved that quickly make-up and
Enter button；
(3) pass through the sealing cooperation in inner sealing surface and external seal face and internal screw thread between the internal screw thread and external screw thread
The interference fit of the guide surface of the guide surface of internal screw thread tooth and externally threaded external screw thread tooth, improves the leakproofness of helicitic texture
Energy；
(4) present invention is connected using large torque interference, prevents back-off from slipping, and be can be used for rotary process and is entered well mode setting of casing work
Industry.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
Attached drawing described here is only used for task of explanation, and is not intended to limit model disclosed by the invention in any way
It encloses.In addition, shape and proportional sizes of each component in figure etc. are only schematical, it is used to help the understanding of the present invention, and
It is not the specific shape and proportional sizes for limiting each component of the present invention.Those skilled in the art under the teachings of the present invention, can
Implement the present invention to select various possible shapes and proportional sizes as the case may be.In the accompanying drawings:
Fig. 1 is a kind of assembling schematic diagram of double lead petroleum casing screws bindiny mechanism in embodiment of the present invention；
Fig. 2 is a kind of tooth form schematic diagram of internal screw thread in embodiment of the present invention；
Fig. 3 is a kind of externally threaded tooth form schematic diagram in embodiment of the present invention；
Fig. 4 is the signal of the first helix and the second helix corresponding to double lead threads in embodiment of the present invention
Figure；
Fig. 5 is the portion the A enlarged drawing in Fig. 1.
Description of symbols:
The second tubular part of 1-；100- external thread part；The first tubular part of 2-；200- internal thread part；3- internal screw thread；30-
Internal screw thread tooth；4- escape；5- inner sealing surface；Shoulder transition face in 6-；7- internal torque shoulder；8- external screw thread；80- external screw thread
Tooth；9- external seal face；10- internal wall transitions face；The outer torque shoulder of 11-；The outer shoulder transition face of 12-；13- guide surface；14- carrying
Face；The first helix of 15-；The second helix of 16-；17- inner wall；The first cutting point of 150-；The second cutting point of 160-；θ 1- is led
To face angle degree；α 1- loading end angle；θ 2- guide surface angle；α 2- loading end angle；S- lead；P- screw pitch；L- taper；O- axis
Line direction.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, below in conjunction with of the invention real
The attached drawing in mode is applied, the technical solution in embodiment of the present invention is clearly and completely described, it is clear that described
Embodiment is only some embodiments of the invention, rather than whole embodiments.Based on the embodiment party in the present invention
Formula, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
The scope of protection of the invention should belong to.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant listed item.
Embodiments, provides a kind of double lead petroleum casing screws bindiny mechanism and its casing tubing strings by the application, use
When, reliable performance and it is able to achieve quick twist-on, to greatly improve operation timeliness.
Fig. 1 to Fig. 4 is please referred to, double lead petroleum casing screws bindiny mechanism provided in the application embodiment
It may include: the internal thread part 200 and internal torque shoulder 7 for being formed in 2 one end of the first tubular part, the internal thread part 200 has
There is the internal screw thread 3 of predetermined taper, the internal screw thread 3 is double lead threads, and the internal screw thread 3 has multiple partially trapezoidal internal screw threads
Tooth 30, the guide surface angle, θ 1 of the internal screw thread tooth 30 are greater than the loading end angle [alpha] 1 of the internal screw thread tooth 30；It is formed in second
The external thread part 100 and outer torque shoulder 11 of 1 one end of tubular part, the external thread part 100 have and the internal thread part 200
The external screw thread 8 of identical taper, the external screw thread 8 are double lead threads, and the external screw thread 8 has multiple partially trapezoidal external screw thread teeth
80, the guide surface angle, θ 2 of the external screw thread tooth 80 is greater than the loading end angle [alpha] 2 of the external screw thread tooth 80.
It is interior on the first tubular part 2 for the first tubular part 2 and the second tubular part 1 by being threadedly engaged
The guide surface angle, θ 1 of thread 30 can be identical with the guide surface angle, θ 2 of external screw thread tooth 80 on the second tubular part 1.First
On tubular part 2 on the loading end angle [alpha] 1 of internal screw thread tooth 30 and the second tubular part 1 external screw thread tooth 80 loading end angle [alpha] 2
It can be identical.
Specifically, double leads provided by the application embodiment are discussed in detail incorporated by reference to the concrete application in petroleum casing pipe
Petroleum casing screw bindiny mechanism.Wherein, the first tubular part 2 can be the form of box cupling, and the second tubular part 1 can be set
The form of the connector of pipe.
Double lead petroleum casing screws bindiny mechanism is mainly used for that large scale casing field is arranged.Specifically, this pair is led
Journey petroleum casing screw bindiny mechanism applies in casing tubing string.Wherein, connector is located at the both ends of casing, and box cupling and casing connect
Head cooperation, for connecting two neighboring casing.
The box cupling is integrally in hollow cylinder, with opposite first end and second end.On the inner wall of the box cupling
It can be disposed with respectively inwards from the first end, the second end: internal screw thread 3, inner sealing surface with predetermined taper L
5 and internal torque shoulder 7.The internal screw thread 3 is double lead threads, and the internal screw thread 3 has multiple partially trapezoidal internal screw thread teeth
30.The guide surface angle, θ 1 of the internal screw thread tooth 30 is between 15 degree to 45 degree；The loading end angle [alpha] 1 of the internal screw thread tooth 30
Between 0 degree to 3 degree.
It can be disposed on the connector: the external screw thread 8 to match with the internal screw thread 3, with the inner sealing surface 5
The external seal face 9 to match, the outer torque shoulder 11 to match with the internal torque shoulder 7.The external screw thread 8 is double lead spiral shells
Line, the external screw thread 8 have multiple partially trapezoidal external screw thread teeth 80, the guide surface angle, θ 2 of the external screw thread tooth 80 at 15 degree extremely
Between 45 degree；The loading end angle [alpha] 2 of the external screw thread tooth 80 is between 0 degree to 3 degree.Wherein, the inner sealing surface 5 with it is outer close
Cover 9 is that interference fit forms the first sealing structure.
On the whole, double lead petroleum casing screws bindiny mechanism provided in the application embodiment, by box cupling
Inner wall on double lead internal screw threads 3 are set, double lead external screw threads 8 are set on the lateral wall of connector, when the two Matching installation, benefit
With the design of double lead helix structures, it can be achieved that quickly upper detain, speed is detained thereon and is promoted to than traditional API screw thread make-up speed
200%, the 2 achievable twist-ons of circle of the application embodiment rotation, further, since the internal screw thread 3 and external screw thread 8 all have it is scheduled
Taper L is that 13 angle of guide surface is greater than the partially trapezoidal of 14 angle of loading end in conjunction with its internal screw thread tooth 30, external screw thread tooth 80
When thread, internal screw thread 3 and 8 make-up of external screw thread, it can be realized quick make-up and enter button, greatly reduce entire upper button on the whole
Time improves operation timeliness.The application is elaborated below with reference to specific embodiment and attached drawing.
In the application embodiment, specifically provide a kind of double lead petroleum casing screws bindiny mechanism comprising: box cupling and
Connector.Wherein, the both ends of box cupling are respectively arranged with internal screw thread 3.Correspondingly, the connector with box cupling cooperation is that two external screw threads connect
Head.Two male connections are connect by external screw thread 8 with box cupling, and casing threads bindiny mechanism is constituted.Wherein, two external screw threads
Connector can be set in the end for two casings for needing to connect by box cupling.
As shown in Figures 2 and 3, wherein internal screw thread 3, external screw thread 8 are improved buttress thread.Specifically, in described
Screw thread 3, the external screw thread 8 guide surface angular range between 15 degree to 45 degree.Preferably, the guide surface angle can be with
Be 35 degree, the internal screw thread 3, the external screw thread 8 loading end angular range between 0 degree to 3 degree, it is preferred that loading end
Angle can be 0.5 degree.When the guide surface angle be 15 degree to 45 degree between, especially when the guide surface angle be 35 degree, institute
State internal screw thread 3, the external screw thread 8 loading end angle be 0.5 degree when, on the one hand advantageously ensure that connector and box cupling assembly when
Quick make-up and enter button, is on the other hand also beneficial to guarantee the reliability that internal screw thread 3 and external screw thread 8 connect.
As shown in figure 4, in the present embodiment, double lead threads on the box cupling or connector may include: first
Helix 15 and the second helix 16, first helix 15 have the first cutting point 150, and second helix 16 has
Second cutting point 160, first cutting point 150 and second cutting point 160 are along the internal screw thread 3 or the external screw thread
The distance of 8 interval axis direction O half pitch P.Second helix of lead S or described 16 of first helix 15 is led
Journey S is twice of the pitch P.
Wherein, what pitch P indicated is the axial distance that adjacent two tooth corresponds to point-to-point transmission on middle line.Lead S indicates same
Adjacent two tooth on one helix corresponds to the axial distance between two o'clock, line number n, lead S and the pitch P of screw thread on middle line
With following relationship: S=n × P.
In the present embodiment, internal screw thread 3 has scheduled taper L.Specifically, the predetermined taper L can be 1:16.Phase
It answers, the external screw thread 8 also taper L having the same.The internal screw thread 3 or the external screw thread 8 are 4 teeth of per inch, and screw pitch is
6.35 millimeter；Lead is 12.7 millimeters.As shown in Figures 2 and 3, the guide surface angle, θ 1 of the internal screw thread tooth 30 of the internal screw thread 3
It is 35 °, loading end angle [alpha] 1 is 0.5 °, and the guide surface angle, θ 2 of the external screw thread tooth 80 of the external screw thread 8 is 35 °, carries face angle
Spending α 2 is 0.5 °, and the taper L of internal screw thread 3 and external screw thread 8 is 1:16, and pitch P 6.35mm, lead S are 12.7mm, internal screw thread
3 and external screw thread 8 cooperate relative rotation 2 enclose can be achieved twist-on complete, greatly reduce the button time, improve operating efficiency.
Thread height in double lead petroleum casing screws bindiny mechanism provided herein is than same specification API thread
Gao Yaogao, and useful thread increases, and improves the bonding strength of link position.
In one embodiment, when the internal screw thread 3 cooperates with the external screw thread 8, the guide surface 13 of internal screw thread tooth 30
It is interference fit, the tooth top and external screw thread of internal screw thread tooth 30 and/or external screw thread tooth 80 between the guide surface 13 of external screw thread tooth 80
It is clearance fit between tooth 80 and the bottom of the tooth of/internal screw thread tooth 30.
In the present embodiment, interference between the guide surface 13 of the internal screw thread tooth 30 and the guide surface 13 of external screw thread tooth 80
After cooperation, the first sealing mechanism is formed.The inner sealing surface 5 of box cupling and the external seal face 9 of connector use metal to metal seal shape
At second seals structure.On the whole, pass through the sealing cooperation in inner sealing surface 5 and external seal face 9 and the interior spiral shell of internal screw thread 3
The interference fit of the guide surface 13 of the external screw thread tooth 80 of the guide surface 13 and external screw thread 8 of line tooth 30, substantially increases threaded connection
The sealing performance of structure.Further, since when internal screw thread 3 and external screw thread 8 match, internal screw thread tooth 30 and/or external screw thread tooth 80
It is clearance fit between tooth top and external screw thread tooth 80 and the bottom of the tooth of/internal screw thread tooth 30, for avoiding box cupling and connector from when cooperating
Existing stuck situation.
In one embodiment, one end of the connector is provided with outer torque shoulder 11, sets on the inner wall of the box cupling
It is equipped with internal torque shoulder 7.Positioning by setting internal torque shoulder 7 and outer torque shoulder 11 convenient for being threadedly coupled.
As shown in figure 5, specifically, folder between the internal torque shoulder 7 and the axis direction O of first tubular part 2
Angle b is 85 degree to 90 degree.Correspondingly, the folder between the outer torque shoulder 11 and the axis direction of second tubular part 1
Angle c is 85 degree to 90 degree.The internal torque shoulder 7 and the outer torque shoulder 11, which match, may be constructed 85 degree to 90 degree of torsion
Square shoulder structure.In particular, not only act as the effect of auxiliary seal when using 90 ° of torque shoulder structures, and can undertake compared with
Big torque wrench moment.
In one embodiment, between the inner sealing surface 5 and the internal torque shoulder 7 have interior shoulder transition face 6,
Between the external seal face 9 and the outer torque shoulder 11 have outer shoulder transition face 12, the interior shoulder transition face 6 with it is described
Outer shoulder transition face 12 matches.There is internal wall transitions face 10, institute between the outer shoulder transition face 12 and the external seal face 9
Internal wall transitions face 10 and the box cupling inner wall are stated as smooth transition.
In the present embodiment, interior shoulder transition face 6, outer shoulder transition face 12 match, for realizing connector and box cupling
Smoothly transit.The inner wall 17 of inner nosepiece wall transition face 10 and box cupling is smooth transition, so that fluid flows through the connector and connects
There is better passability when binding round the position of cooperation, be conducive to eliminate turbulent flow.
In one embodiment, escape 4 can be set between the internal screw thread 3 and the inner sealing surface 5.This is moved back
Cutter groove 4 realizes the transition of the internal screw thread 3 and inner sealing surface 5 of box cupling, is conducive to turnery processing, to the damage of sealing surface when avoiding processing
Wound.
As shown in figure 4, double lead petroleum casing screws bindiny mechanism provided in the application embodiment is using double spiral shells
Spiral line structure design is, it can be achieved that quickly upper detain, and button speed is promoted to 200% than traditional API screw thread make-up speed thereon, 2 circles
Twist-on can be achieved to complete, when processing, the lead S of single thread is 6.35mm, pitch P=6.35mm.And for double lead threads
For, lead S=6.35 × 2=12.7mm, pitch P=6.35mm.The first helix 15 first is processed from the first cutting point 150,
Then from the first cutting point 150 along Z-direction (namely internal screw thread 3 axial direction or external screw thread 8 axial direction) translation 6.35/2=
The second cutting point 160 is reached after 3.175mm, processes the second helix 16 from the second cutting point 160.
On the whole, a kind of double lead petroleum casing screws bindiny mechanism is provided in embodiment of the present invention, on the whole structure
Simply, easy to operate, reliable performance, work efficiency is high.
In a specific embodiment, double lead threads, i.e. 2 head threads, are designed using double helix structure,
The loading end angle of internal screw thread tooth 30 and the loading end angle of external screw thread tooth are 0.5 °, the guide surface angle of internal screw thread tooth 30 and
The guide surface angle of external screw thread tooth is 35 °, and the taper L of internal screw thread 3 and the taper L of external screw thread 8 are 1:16, internal screw thread 3
It is 12.7mm that pitch P and the pitch P of external screw thread 8, which are 6.35mm, the lead S of internal screw thread 3 and the lead S of external screw thread 8, can be real
Now quick make-up speed is promoted to 200% than traditional API screw thread make-up speed, and 2, which enclose achievable twist-on, completes, and guarantees screw thread spiral shell
Away from new setting, embody double lead petroleum casing screws bindiny mechanism can realize quick make-up, it is upper button etc. various features, from
And meet oil field prospecting and exploitation cost efficiency requirement, operation timeliness is improved, there is good practicability.The application embodiment
Provided in double lead petroleum casing screws bindiny mechanism suitable for 13-3/8in or more heavy caliber casing tubing string.
A kind of casing tubing string is also provided in the application embodiment, which may include: multiple casings, and adjacent two
Double lead petroleum casing screws bindiny mechanism described in above embodiment is provided between a casing.Specifically, being provided with
The casing tubing string of double lead petroleum casing screws bindiny mechanism can reach double institutes of lead petroleum casing screw bindiny mechanism can be real
Existing technical effect, specifically, details are not described herein by the application.
It was verified that embodiment of the present invention double lead petroleum casing screws bindiny mechanism and its casing tubing string with it is existing
Technology is compared, and is had the following beneficial effects:
(1) internal screw thread 3 and external screw thread 8 are all made of double lead threads, and make-up speed is than traditional API screw thread make-up speed
It is promoted to 200%, the 2 achievable twist-ons of circle are rotated between internal screw thread 3 and external screw thread 8, the button time is substantially reduced, improves work
Industry timeliness；
(2) the external screw thread tooth 80 of the internal screw thread tooth 30 of the internal screw thread 3 and external screw thread 8 uses partially trapezoidal screw thread dental structure,
For example, the loading end angle [alpha] 1 of internal screw thread tooth 30 and the loading end angle [alpha] 2 of external screw thread tooth 80 are 0.5 °, internal screw thread tooth 30
The guide surface angle, θ 2 of guide surface angle, θ 1 and external screw thread tooth 80 is 35 °, the taper L of the internal screw thread 3 and the taper of external screw thread 8
L is 1:16, it can be achieved that quickly make-up and entering button；
(3) pass through the sealing cooperation in inner sealing surface 5 and external seal face 9 and interior spiral shell between the internal screw thread 3 and external screw thread 8
The interference fit of the guide surface 13 of the external screw thread tooth 80 of the guide surface 13 and external screw thread 8 of the internal screw thread tooth 30 of line 3, improves screw thread
The sealing performance of structure；
(4) it is connected in embodiment of the present invention using large torque interference, prevents back-off from slipping, can be used for rotary process and enter well side
Formula casing job.
It should be noted that in the description of the present invention, term " first ", " second " etc. are used for description purposes only and distinguish
Similar object between the two and is not present sequencing, can not be interpreted as indication or suggestion relative importance.In addition,
In description of the invention, unless otherwise indicated, the meaning of " plurality " is two or more.
Herein cited any digital value all include between lower limit value to upper limit value with the lower value of an incremented and
The all values of upper value, there are the intervals of at least two units between any lower value and any much higher value.For example, such as
Fruit elaborates that the quantity an of component or the value of process variable (such as temperature, pressure, time etc.) are from 1 to 90, preferably from 21
To 80, more preferably from 30 to 70, then purpose is arrived in order to illustrate also clearly listing such as 15 to 85,22 in the specification
68,43 to 51,30 to 32 is equivalent.For the value less than 1, suitably think that a unit is 0.0001,0.001,0.01,0.1.
These are only intended to the example clearly expressed, it is believed that all possibility for the numerical value enumerated between minimum and peak
Combination is all expressly set forth in the specification in a similar manner.
Unless otherwise indicated, all ranges all include all numbers between endpoint and endpoint.It is used together with range
" about " or " approximation " be suitable for two endpoints of the range.Thus, " about 20 to 30 " are intended to cover that " about 20 to about
30 ", including at least the endpoint indicated.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except provided example all will be aobvious and easy for a person skilled in the art
See.Therefore, the range of this introduction should not be determined referring to foregoing description, but should referring to preceding claims and this
The full scope of the equivalent that a little claims are possessed determines.For comprehensive purpose, all articles and with reference to including special
The disclosure of benefit application and bulletin is all by reference to being incorporated herein.Theme disclosed herein is omitted in preceding claims
Any aspect is not intended to abandon the body matter, also should not be considered as applicant the theme is not thought of as it is disclosed
A part of subject matter.
Claims (10)
1. a kind of double lead petroleum casing screws bindiny mechanism characterized by comprising
It is formed in the internal thread part and internal torque shoulder of first tubular part one end, the internal thread part has the interior of predetermined taper
Screw thread, the internal screw thread are double lead threads, and the internal screw thread has multiple partially trapezoidal internal screw thread teeth, the internal screw thread tooth
Guide surface angle is greater than the loading end angle of the internal screw thread tooth；
The external thread part and outer torque shoulder, the external thread part for being formed in second tubular part one end have and the internal screw thread
The external screw thread of the identical taper in portion, the external screw thread are double lead threads, and the external screw thread has multiple partially trapezoidal external screw thread teeth,
The guide surface angle of the external screw thread tooth is greater than the loading end angle of the external screw thread tooth.
2. lead petroleum casing screw bindiny mechanisms as described in claim 1 double, which is characterized in that the internal screw thread with it is described
It is provided with inner sealing surface between internal torque shoulder, external seal face, institute are provided between the external screw thread and the outer torque shoulder
It states inner sealing surface and can be sealed with the external seal face and cooperated.
3. double lead petroleum casing screw bindiny mechanisms as described in claim 1, which is characterized in that double lead thread packets
The first helix and the second helix are included, first helix has the first cutting point, and second helix has second
Cutting point, first cutting point and second cutting point are along the internal screw thread or the externally threaded axis direction interval half
The lead of the distance of a screw pitch, the lead of first helix and second helix is twice of the screw pitch.
4. double lead petroleum casing screws bindiny mechanism as described in claims 1 or 2 or 3, which is characterized in that the internal screw thread
The guide surface angle of tooth and the guide surface angle of the external screw thread tooth are 15 degree to 45 degree, the carrying face angle of the internal screw thread tooth
The loading end angle of degree and the external screw thread tooth is 0 degree to 3 degree.
5. double lead petroleum casing screw bindiny mechanisms as described in claim 1, which is characterized in that the predetermined taper is 1:
16。
6. double lead petroleum casing screw bindiny mechanisms as claimed in claim 1 or 2, which is characterized in that in the internal screw thread
In the state of the external screw thread, the guide surface of the internal screw thread can be interference fitted with the externally threaded guide surface.
7. lead petroleum casing screw bindiny mechanisms as described in claim 1 double, which is characterized in that the internal torque shoulder with
Angle between the axis direction of first tubular part is 85 degree to 90 degree, the outer torque shoulder and second tubulose
Angle between the axis direction of component is 85 degree to 90 degree.
8. double lead petroleum casing screw bindiny mechanisms as claimed in claim 2, which is characterized in that the inner sealing surface and institute
Stating has interior shoulder transition face between internal torque shoulder, have outer shoulder mistake between the external seal face and the outer torque shoulder
Face is crossed, the interior shoulder transition face is matched with the outer shoulder transition face.
9. lead petroleum casing screw bindiny mechanisms as claimed in claim 2 double, which is characterized in that the internal screw thread with it is described
Escape is provided between inner sealing surface.
10. a kind of casing tubing string characterized by comprising multiple casings are connected with box cupling between two neighboring described sleeve pipe,
Double lead petroleum casing screws as in one of claimed in any of claims 1 to 9 are formed between described sleeve pipe and the box cupling
Bindiny mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553120.9A CN109372444A (en) | 2018-12-19 | 2018-12-19 | Double lead petroleum casing screws bindiny mechanism and its casing tubing string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811553120.9A CN109372444A (en) | 2018-12-19 | 2018-12-19 | Double lead petroleum casing screws bindiny mechanism and its casing tubing string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109372444A true CN109372444A (en) | 2019-02-22 |
Family
ID=65370817
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811553120.9A Pending CN109372444A (en) | 2018-12-19 | 2018-12-19 | Double lead petroleum casing screws bindiny mechanism and its casing tubing string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109372444A (en) |
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| CN202140037U (en) * | 2011-07-25 | 2012-02-08 | 天津鲍斯威尔金属管材科技有限公司 | Connecting structure of tapered threaded sleeve with twin buttresses |
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