CN104929534B - Safety connector for oil field working - Google Patents
Safety connector for oil field working Download PDFInfo
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- CN104929534B CN104929534B CN201510346547.1A CN201510346547A CN104929534B CN 104929534 B CN104929534 B CN 104929534B CN 201510346547 A CN201510346547 A CN 201510346547A CN 104929534 B CN104929534 B CN 104929534B
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- adapter
- inner tube
- tube wall
- oil field
- limiting structure
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Abstract
The invention relates to the field of oil field downhole tubular column matching tools, in particular to a safety connector for an oil field work. The safety connector mainly aims to improve the separation function controllability. The safety connector for the oil field work comprises a first connection pipe, a second connection pipe, a first set of shear nails and an inner pipe. A first limiting structure is arranged in a first connection pipe channel. One end of the second connection pipe is provided with a second limiting structure. One end of the second connection pipe is inserted into a channel of the first connection pipe. The inner pipe is positioned on the first position in a channel of the second connection pipe. The outer surface of the pipe wall of the inner pipe makes contact with the second limiting structure in an abutted mode so that the second limiting structure can be matched with the first limiting structure in a limited mode. The superficial area of the side faces of the two ends of the axis of the inner pipe are the first area and the second area, wherein the first area value is smaller than the second area value. After the pressure in the safety connector channel is enhanced, under the action of the pressure across the side faces of the two ends of the axis of the pipe, the inner pipe moves along the axis to be separated from the second limiting structure, and the second limiting structure is capable of being movably separated from the first limiting structure.
Description
Technical field
The present invention relates to pipe string of oil field downhole kit field, more particularly to a kind of oil field operation safety joint.
Background technology
In oil and gas development operation, oil field operation safety joint is the special work for underground work and flow string
Tool.Its effect is when down-hole string has an accident, and can disengage meeting card tubing string at oil field operation safety joint, thus being
Good condition is created in processing further of accident.Oil field operation safety joint is commonly used in complex the applying of tubular column structure
Work well and having in the well of special operation requirement.At present conventional oil field operation safety joint in straight well mainly have back-buckling type and
Two kinds of shear pin formula.The top connection of back-buckling type oil field operation safety joint and lower contact are connected by left hand thread, when tubing string exists
After card is met in down-hole, need to rotate clockwise tubing string, if hole condition complexity moment of torsion is not delivered to position, oil field operation is difficult to safety joint
Open, success rate is low, reliability is poor；And routine shear pin formula oil field operation safety joint includes the two parts being plugged in together
Pipe, the tube wall of Part I and Part II is fixed how by one or with shear pin grafting, and wherein, shear pin is through Part I
Tube wall, is fixed with Part II, only leans on the spacing connection of shear pin between Part I and Part II.Relatively low in the intensity of shear pin
When, oil field operation safety joint is easily affected by hole condition in operation in well, such as occurs a well head, lowering velocity too fast
Afterwards, the shear pin of oil field operation safety joint is easy to fracture halfway, so that Part I is separated with Part II, causes operation thing
Therefore.When the intensity of shear pin is too high, the Part I of above-mentioned oil field operation safety joint with Part II when needing to separate, by
Too high in shear pin intensity, pulling force between Part I and Part II is difficult to separate shear pin so that oil field operation safety
Joint cannot realize separation function.
Content of the invention
In view of this, the present invention provides a kind of oil field operation safety joint, and main purpose is that improving oil field operation uses
The controllability of safety joint separation function.
For reaching above-mentioned purpose, present invention generally provides following technical scheme:
Embodiments of the invention provide a kind of oil field operation safety joint, comprising:
First adapter, is provided with the first position limiting structure in the passage of described first adapter；
Second adapter, one end of described second adapter is provided with the second position limiting structure, one end insertion of described second adapter
In the passage of described first adapter；
First group of shear pin, the jack insertion from described first adapter tube wall, and be inserted on described second adapter tube wall
Jack in；
Inner tube, is positioned at first position, the outer surface of tube wall of said inner tube and the institute in the passage of described second adapter
State the second position limiting structure to conflict, so that described second position limiting structure and described first position limiting structure is cooperated spacing；Wherein,
The side surface at said inner tube axis two ends is amassed and is respectively the first area and second area, and described first area value is little
In described second area value；
After the pressure in described oil field operation safety joint passage is promoted to the second pressure by the first pressure, in institute
In the presence of stating pressure at the side at inner tube axis two ends, said inner tube is in the axial direction from described primary importance movement to second
Position, the outer surface of tube wall of said inner tube is separated with described second position limiting structure, and described second position limiting structure can be to described
Two adapter channel interior direction activities, and separate with described first position limiting structure.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Optionally, aforesaid oil field operation safety joint, wherein also includes:
For said inner tube being positioned at second group of shear pin of the first position in the passage of described second adapter；
Jack insertion from described second adapter tube wall for the described second group of shear pin, and be inserted on said inner tube tube wall
In jack.
Optionally, aforesaid oil field operation safety joint, wherein also includes:
Snap ring；
First groove of one ring-type is had on the outer surface of tube wall of said inner tube；
Second groove of one ring-type is had on the inner surface of tube wall of described second adapter；
The inner surface of tube wall pressure that described snap ring is taken over by described second sets elastic deformation in described first groove；
In said inner tube movement to the second position, at mobile extremely described second groove location of described snap ring, described snap ring
To described second groove, the internal ring of described snap ring is located in described first groove for outer shroud elastic deformation.
Optionally, aforesaid oil field operation safety joint, wherein said inner tube one end is inserted into described first adapter
In passage, the other end of said inner tube is located in the passage of described second adapter；
First group of seal groove is provided with the outer surface of tube wall of said inner tube one end；
Second group of seal groove is provided with the outer surface of tube wall of the said inner tube other end；
It is provided with first group of o shape sealing ring, the tube wall of said inner tube one end and described first in described first group of seal groove
By described first group of o shape sealing ring sealing between nozzle inner wall；
It is provided with second group of o shape sealing ring, the tube wall of the said inner tube other end and described the in described second group of seal groove
By described second group of o shape sealing ring sealing between two nozzle inner walls.
Optionally, aforesaid oil field operation safety joint, wherein said first position limiting structure is to connect positioned at described first
Stopper slot on inside pipe wall；
Described second position limiting structure includes at least one strip plate positioned at described second adapter one end and is located at described
Projection on strip plate；
Described strip plate is pressed on the inwall of described first adapter the outer surface of tube wall of said inner tube, and described projection is stretched
Enter in described stopper slot.
Optionally, aforesaid oil field operation safety joint, the first side of wherein said projection is and described stopper slot
Stress surface；
First outer surface of described strip plate is connected with the first side of described projection；
Angle between described first side and described first outer surface is obtuse angle；
When the outer surface of tube wall of said inner tube is separated with described strip plate, described first adapter and the described second adapter are subject to
External pull, under the guiding of described first side, described projection moves in described stopper slot to described stopper slot, described
Strip plate is bent to the second form from the first form.
Optionally, aforesaid oil field operation safety joint, wherein said strip plate be elastic plate, described strip plate to
The bending shape of said inner tube channel interior bending is configured to straight bar shape by the outer wall pressure of said inner tube；
When the outer surface of tube wall of said inner tube is separated with described strip plate, in the elastic restoring force effect of described strip plate
Under, described strip plate bends deformation to said inner tube channel interior, and described projection moves to described spacing from described stopper slot
Outside groove.
Optionally, aforesaid oil field operation safety joint, wherein said inner tube is included positioned at described first area side
The Part I of side and the Part II being located at described second area side side；
Described strip plate is pressed on the inwall of described first adapter the outer surface of tube wall of described Part I；
The outer surface of tube wall of described Part II is provided with the receiving space for accommodating described strip plate；
When the outer surface of tube wall of said inner tube is separated with described strip plate, described strip plate can be from the described first adapter
It is bent on inwall in described receiving space, described projection moves to described stopper slot in described stopper slot.
Optionally, aforesaid oil field operation safety joint, the external diameter of wherein said Part I is less than described second
The external diameter dividing, the internal diameter of described Part I is equal to the internal diameter of described Part II.
Optionally, aforesaid oil field operation safety joint, the external diameter of wherein said Part I is equal to described second
The external diameter dividing, the internal diameter of described Part I is more than the internal diameter of described Part II.
Optionally, aforesaid oil field operation safety joint, wherein said strip plate is a plurality of；
A plurality of strip plate is looped around described second adapter tube wall one week.
Optionally, aforesaid oil field operation safety joint, the jack on wherein said first adapter tube wall and/or described
Jack on second adapter tube wall is more than in described oil with the bore size on safety joint length direction in described oil field operation
Field operation safety joint bore size in the radial direction；
Jack on described first adapter tube wall and/or the jack ovalize hole on described second adapter tube wall or rhombus
Hole；
Jack on described first adapter tube wall and/or the jack on described second adapter tube wall and described first group of shear pin
Side wall be linear contact lay.
By technique scheme, the oil field operation safety joint that technical solution of the present invention provides at least has following excellent
Point:
First adapter of the oil field operation safety joint that the present invention provides and the second adapter are fixed by first group of shear pin
Together, with respect to prior art, inner tube is set up by the first position in the passage of the second adapter, by said inner tube
The second position limiting structure on outer surface of tube wall and the second adapter is conflicted, and makes described second position limiting structure and described first position limiting structure
Cooperate spacing, can outside first group of shear pin, also by the first position limiting structure and the second position limiting structure cooperation with solid
Fixed first adapter and the second adapter, increased the external pull that can bear between the first adapter and the second adapter.Wherein, described interior
The side surface at pipe axis two ends is amassed and is respectively the first area and second area, and described first area value is less than described second area
Value, after the pressure in described oil field operation safety joint passage is risen to certain value, positioned at said inner tube axis two ends
The stress difference of side surface can be continuously increased value one numerical value, so that said inner tube is subjected to displacement, so that the tube wall of said inner tube
Outer surface can be separated with described second position limiting structure, in the presence of not being subject to said inner tube outer surface of tube wall pressure, described
Two position limiting structures can be movable into described second adapter passage, and separates with described first position limiting structure, described first spacing knot
Structure and described second position limiting structure no longer play position-limiting action to the first adapter with the second adapter.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of description, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Brief description
By reading the detailed description of hereafter preferred implementation, various other advantages and benefit are common for this area
Technical staff will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as to the present invention
Restriction.And in whole accompanying drawing, it is denoted by the same reference numerals identical part.In the accompanying drawings:
Fig. 1 is a kind of structural representation of oil field operation safety joint that embodiments of the invention provide；
Fig. 2 is the structural representation of the second adapter in a kind of oil field operation safety joint that embodiments of the invention provide
Figure；
Fig. 3 is the structural representation of inner tube in a kind of oil field operation safety joint that embodiments of the invention provide；
Fig. 4 is the structural representation of the first adapter in a kind of oil field operation safety joint that embodiments of the invention provide
Figure.
Specific embodiment
The present invention is to solve the shadow that oil field operation safety joint in prior art is easily subject to hole condition in operation in well
Ring, the shear pin of oil field operation safety joint is easy to the problem that midway fractures, there is provided a kind of oil field operation of new structure
With safety joint, to improve the controllability of oil field operation safety joint separation function.
The technical scheme of the embodiment of the present invention is to solve above-mentioned technical problem, and general thought is as follows:
A kind of oil field operation safety joint that the present invention provides includes:
First adapter, is provided with the first position limiting structure in the passage of described first adapter；
Second adapter, one end of described second adapter is provided with the second position limiting structure, one end insertion of described second adapter
In the passage of described first adapter；
First group of shear pin, the jack insertion from described first adapter tube wall, and be inserted on described second adapter tube wall
Jack in；
Inner tube, is positioned at first position, the outer surface of tube wall of said inner tube and the institute in the passage of described second adapter
State the second position limiting structure to conflict, so that described second position limiting structure and described first position limiting structure is cooperated spacing；Wherein,
The side surface at said inner tube axis two ends is amassed and is respectively the first area and second area, and described first area value is little
In described second area value；
After the pressure in described oil field operation safety joint passage is promoted to the second pressure by the first pressure, in institute
In the presence of stating pressure at the side at inner tube axis two ends, said inner tube is in the axial direction from described primary importance movement to second
Position, the outer surface of tube wall of said inner tube is separated with described second position limiting structure, and described second position limiting structure can be to described
Two adapter channel interior direction activities, and separate with described first position limiting structure.
First adapter of the oil field operation safety joint that the present invention provides and the second adapter are fixed by first group of shear pin
Together, with respect to prior art, inner tube is set up by the first position in the passage of the second adapter, by said inner tube
The second position limiting structure on outer surface of tube wall and the second adapter is conflicted, and makes described second position limiting structure and described first position limiting structure
Cooperate spacing, can outside first group of shear pin, also by the first position limiting structure and the second position limiting structure cooperation with solid
Fixed first adapter and the second adapter, increased the external pull that can bear between the first adapter and the second adapter.Wherein, described interior
The side surface at pipe axis two ends is amassed and is respectively the first area and second area, and described first area value is less than described second area
Value, after the pressure in described oil field operation safety joint passage is risen to certain value, positioned at said inner tube axis two ends
The stress difference of side surface can be continuously increased value one numerical value, so that said inner tube is subjected to displacement, so that the tube wall of said inner tube
Outer surface can be separated with described second position limiting structure, in the presence of not being subject to said inner tube outer surface of tube wall pressure, described
Two position limiting structures can be movable into described second adapter passage, and separates with described first position limiting structure, described first spacing knot
Structure and described second position limiting structure no longer play position-limiting action to the first adapter with the second adapter.
For further illustrating that the present invention is to reach technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to according to oil field operation proposed by the present invention its specific embodiment of safety joint, structure, feature
And its effect, after describing in detail such as.In the following description, being not necessarily that different " embodiment " or " embodiment " refers to is same
Embodiment.Additionally, special characteristic in one or more embodiments, structure or feature can be combined by any suitable form.
The terms "and/or", only a kind of incidence relation of description affiliated partner, represents there may be three kinds of passes
System, for example, a and/or b, specifically it is interpreted as: a and b can be included simultaneously, can be with individualism a it is also possible to individualism
B, can possess above-mentioned three kinds arbitrary middle situations.
As shown in figure 1, a kind of oil field operation safety joint that one embodiment of the present of invention proposes, comprising: first
Adapter 1,2, first group of shear pin 3 of the second adapter and inner tube 4.It is provided with the first position limiting structure in the passage of described first adapter 1
11.One end of described second adapter 2 is provided with the second position limiting structure 21, and one end insertion described first of described second adapter 2 connects
In the passage of pipe 1.Jack insertion from described first adapter 1 tube wall for the described first group of shear pin 3, and be inserted into described second and connect
In jack on pipe 2 tube wall.Said inner tube 4 is positioned at the first position in the passage of described second adapter 2, said inner tube 4
Outer surface of tube wall conflict with described second position limiting structure 21, make described second position limiting structure 21 and described first position limiting structure 11
Cooperate spacing.Wherein, the side surface at said inner tube 4 axis two ends is amassed and is respectively the first area and second area, described
First area value is less than described second area value.By described oil field operation with the pressure in safety joint passage by the first pressure
After being promoted to the second pressure, in the presence of pressure at the side at said inner tube 4 axis two ends, said inner tube 4 is in the axial direction
From described primary importance movement to the second position, the outer surface of tube wall of said inner tube 4 is separated with described second position limiting structure 21, institute
State the second position limiting structure 21 can to the activity of described second adapter 2 channel interior direction, and with 11 points of described first position limiting structure
From.Wherein, in the axial direction from described primary importance movement to the second position, the direction of its displacement is the first area to said inner tube
Side direction direction.The number of first group of shear pin can be one, and alternatively for multiple, multiple shear pins are uniformly looped around first
On adapter tube wall.
In oil and gas development operation, specific operating process is:
Squeeze into an outer tube to underground；
First adapter is connected an outer tube, the second adapter is connected an outer tube, in outer tube, oil field operation
With connecting and composing inner passage in safety joint；
Outer tube and oil field operation safety joint are together inserted in outer tube, in outer tube and outer tube, oil
Form external channel, the bottom of inner passage is connected with external channel between the operation safety joint of field；
Accident occurs in effect, after external channel is blocked, when needing to separate oil field operation safety joint, can be to
Inner passage is passed through liquid (as water) or gas, to increase the pressure in inner passage, until the side at said inner tube axis two ends
Surface pressure only poor to certain value, the outer surface of tube wall of said inner tube can be made by inner tube by primary importance movement to the second position
Separate with described second position limiting structure, to release restriction to the second position limiting structure position, thus release the first position limiting structure with
Matching relationship between second position limiting structure；
Then, add pulling force by direct or indirect between the first adapter and the second adapter, due to the first spacing knot
Structure and the second position limiting structure no longer produce position-limiting action it is only necessary to destroy first group of shear pin, you can by the first adapter and second
Adapter separates.
First adapter of the oil field operation safety joint that one embodiment of the invention provides and the second adapter pass through first group
Shear pin is fixed together, and with respect to prior art, sets up inner tube by the first position in the passage of the second adapter, by institute
The second position limiting structure stated on the outer surface of tube wall and the second adapter of inner tube is conflicted, and makes described second position limiting structure and described first
Position limiting structure cooperate spacing, can be outside first group of shear pin, also by the first position limiting structure and the second position limiting structure
Cooperation, to fix the first adapter and the second adapter, increased the external pull that can bear between the first adapter and the second adapter.Its
In, the side surface at said inner tube axis two ends is amassed and is respectively the first area and second area, and described first area value is less than institute
State second area value, after the pressure in described oil field operation safety joint passage is risen to certain value, positioned at described interior
The stress difference of the side surface at pipe axis two ends can be continuously increased value one numerical value, so that said inner tube is subjected to displacement, so that described
The outer surface of tube wall of inner tube can be separated with described second position limiting structure, is not being acted on by said inner tube outer surface of tube wall pressure
Under, described second position limiting structure can the activity into described second adapter passage, and separate with described first position limiting structure, described the
One position limiting structure and described second position limiting structure no longer play position-limiting action to the first adapter with the second adapter.
Wherein, the first position in order to be positioned at said inner tube in the passage of described second adapter, can adopt multiple
Implementation, specifically can be found in following manner, when being not limited to following implementations:
First, the oil field operation safety joint described in above-described embodiment, as shown in figure 1, wherein also include: for by institute
State second group of shear pin 5 that inner tube 4 is positioned at the first position in the passage of described second adapter 2.Described second group of shear pin 5 from
Jack insertion on described second adapter 2 tube wall, and be inserted in the jack on said inner tube 4 tube wall.Described second group of shear pin
Number can be one or more.
2nd, the oil field operation safety joint described in above-described embodiment, the one or both ends of wherein said inner tube and bullet
Spring is conflicted, and described spring is connected on the inwall of described second adapter, and under the elastic force of described spring, said inner tube is positioned in
First position in the passage of described second adapter.
Further, it is passed through liquid or gas in internally pipeline, make said inner tube by primary importance movement to second
Postpone, a latch-up structure can be set inner tube is locked in second position.Specifically, as shown in Figure 1, Figure 2 and Figure 3, above-mentioned reality
Apply the oil field operation safety joint described in example, wherein also include: snap ring 6.One is had on the outer surface of tube wall of said inner tube 4
First groove 41 of ring-type.Second groove 22 of one ring-type is had on the inner surface of tube wall of described second adapter 2.Described snap ring 6
Elastic deformation is set in described first groove 41 by the inner surface of tube wall pressure of described second adapter 2.Said inner tube 4 mobile to the
Two positions, at mobile extremely described second groove 22 position of described snap ring 6, the outer shroud elastic deformation extremely described second of described snap ring 6
In groove 22, the internal ring of described snap ring 6 is located in described first groove 41.Snap ring can limit described first groove and described the
Relative position relation between two grooves is such that it is able to be limited to second position by inner tube.Even if by the pressure in security header
Recover to the first pressure, inner tube still can rest on second position.Wherein, snap ring can be the ring spring with opening.
In order to improve the sealing effectiveness between the first adapter, the second adapter, the oil field operation described in above-described embodiment is used
Safety joint, as shown in figures 1 and 3, wherein said inner tube 4 one end is inserted in the passage of described first adapter 1, said inner tube
4 other end is located in the passage of described second adapter 2.Be provided with the outer surface of tube wall of said inner tube 4 one end first group close
Sealing groove 42.Second group of seal groove 43 is provided with the outer surface of tube wall of said inner tube 4 other end.In described first group of seal groove 42
It is provided with first group of o shape sealing ring 7, between the tube wall of said inner tube 4 one end and described first adapter 1 inwall, pass through described first
Group o shape sealing ring 7 seals.It is provided with second group of o shape sealing ring 8 in described second group of seal groove 43, said inner tube 4 other end
Sealed by described second group of o shape sealing ring 8 between tube wall and described second adapter 2 inwall.Wherein, first group of seal groove,
Two groups of seal grooves can be ring groove, and number can be respectively one or more.When internally passage is passed through liquid or gas,
The first adapter, the sealing effectiveness of the second adapter junction can be increased, thus improving compression rate.
Wherein, described first position limiting structure, the concrete structure of described second position limiting structure can be found in following sides of implementing
Formula, but it is not only limited to following manner:
The first: as shown in Figure 1, Figure 2 and Figure 4, the oil field operation safety joint described in one embodiment of the invention
Also provide following embodiment, wherein said first position limiting structure 11 is the stopper slot on described first adapter 1 inwall.
Described second position limiting structure 21 includes at least one strip plate 211 positioned at described second adapter 2 one end and is located at described length
Projection 212 on batten 211.Described strip plate 211 is pressed on described first adapter 1 by the outer surface of tube wall of said inner tube 4
On inwall, described projection 212 is inserted in described stopper slot.Under the cooperation with stopper slot for the projection, limit described first adapter
Displacement and described second adapter between.
After the outer surface of tube wall of said inner tube is separated with described second position limiting structure, need the described first adapter and institute
When stating the second adapter pulling and opening, described projection is also possible to rest in described stopper slot.In pulling first adapter and the second adapter
During, for the ease of making projection separate in stopper slot, the oil field operation safety joint described in above-described embodiment,
As shown in Fig. 2 first side 212a of wherein said projection is the stress surface with described stopper slot.The of described strip plate 211
One outer surface 221a is connected with first side 212a of described projection.Described first side 212a and described first outer surface 211a
Between angle be obtuse angle.First outer surface of described strip plate is fitted with the inwall of the described first adapter.When said inner tube
Outer surface of tube wall is separated with described strip plate, and described first adapter is subject to external pull with described second adapter, described first
Under the guiding of side, described projection moves to described stopper slot in described stopper slot, and described strip plate is curved from the first form
Roll over to the second form.Described first side is set to inclined-plane, the outer surface of described first side and strip plate in obtuse angle, first
Guide effect can be played in side, so that projection is easily facilitated and separate in stopper slot.In addition, on described stopper slot with described
The competing surface of first side of projection may also be employed the structure on inclined-plane.
Or, the oil field operation safety joint described in one embodiment of the invention also provides following embodiment,
Wherein said strip plate is elastic plate, and described strip plate is from the bending shape bending to said inner tube channel interior by said inner tube
Outer wall pressure be configured to straight bar shape.When the outer surface of tube wall of said inner tube is separated with described strip plate, in described strip plate
Under elastic restoring force effect, described strip plate bends deformation to said inner tube channel interior, and described projection is in described stopper slot
Outside mobile extremely described stopper slot.After said inner tube movement to the second position, projection can be automatically separated with stopper slot.Wherein, long
Batten can be made using sheet metal material.
In the middle of being embodied as, as shown in figure 3, the safety joint of the oil field operation described in one embodiment of the invention is also
Following embodiment is provided, wherein said inner tube 4 include Part I 4a positioned at described first area side side and
Part II 4b positioned at described second area side side.The outer surface of tube wall of described Part I 4a is by described strip plate pressure
It is located on the inwall of described first adapter.The outer surface of tube wall of described Part II 4b is provided with for accommodating described strip plate
Receiving space 44.When the outer surface of tube wall of said inner tube 4 is separated with described strip plate, described strip plate can connect from described first
It is bent on the inwall of pipe in described receiving space 44, described projection moves to described stopper slot in described stopper slot.?
In concrete manufacture link, described receiving space can be made up of a ring groove, and ring groove is located at the appearance in the middle part of said inner tube
On face.
In the middle of be embodied as, in order to obtain the side of two different size sizes at inner tube two ends, wherein said first
Partial external diameter is less than the external diameter of described Part II, and the internal diameter of described Part I is equal to the internal diameter of described Part II.Or
Person, the external diameter of described Part I is equal to the external diameter of described Part II, and the internal diameter of described Part I is more than described second
The internal diameter dividing.
In the middle of be embodied as, the oil field operation safety joint described in above-described embodiment, wherein said strip plate is
A plurality of.A plurality of strip plate is looped around described second adapter tube wall one week.
Second: the oil field operation safety joint described in one embodiment of the invention also provides following embodiment party
Formula, wherein said first position limiting structure is the projection on described first nozzle inner wall.Described second position limiting structure includes position
At least one strip plate and the groove being located on described strip plate in described second adapter one end.Outside the tube wall of said inner tube
Described strip plate is pressed on the inwall of described first adapter on surface, and described projection is inserted in described stopper slot.In projection
Under the cooperation of stopper slot, limit the displacement between described first adapter and described second adapter.
Further, in order to improve the resistance to impact of oil field operation safety joint, as shown in Figure 2 and Figure 4, the present invention's
Oil field operation safety joint described in one embodiment also provides following embodiment, wherein said first adapter 1 tube wall
On jack 12 and/or the jack 23 on described second adapter 2 tube wall in described oil field operation with safety joint length direction
Bore size be more than described oil field operation with safety joint bore size in the radial direction.Described first adapter 1 tube wall
On jack 12 and/or the jack 23 ovalize hole on described second adapter 2 tube wall.Or, on described first adapter 1 tube wall
Jack 23 on jack 12 and/or described second adapter 2 tube wall assumes diamond in shape shape hole.Jack on described first adapter tube wall and/
Or the jack on described second adapter tube wall is linear contact lay with the side wall of described first group of shear pin.In oil field operation safety joint
Impacted, after making described first adapter, described second adapter occur slight position mobile, adopted with respect in prior art
Circular hole, for the structure that first group of shear pin is wrapped by circular hole, oval or rhombus through hole can give the first shear pin deformation
Space, make described first shear pin that slight deformation to occur, therefore, after receiving impact, be not easily broken.
" first ", " second " in above-described embodiment etc. is for distinguishing each embodiment, and does not represent each embodiment
Good and bad.
The above, be only presently preferred embodiments of the present invention, and not the present invention is made with any pro forma restriction, according to
Any simple modification, equivalent variations and modification above example made according to the technical spirit of the present invention, all still falls within this
In the range of bright technical scheme.
Claims (12)
1. a kind of oil field operation safety joint is it is characterised in that include:
First adapter, is provided with the first position limiting structure in the passage of described first adapter；
Second adapter, one end of described second adapter is provided with the second position limiting structure, and one end insertion of described second adapter is described
In the passage of the first adapter；
First group of shear pin, the jack insertion from described first adapter tube wall, and it is inserted into inserting on described second adapter tube wall
In the hole；
Inner tube, is positioned at the first position in the passage of described second adapter, the outer surface of tube wall of said inner tube and described the
Two position limiting structures are conflicted, and so that described second position limiting structure and described first position limiting structure is cooperated spacing；Wherein,
The side surface at said inner tube axis two ends is amassed and is respectively the first area and second area, and described first area value is less than institute
State second area value；
After the pressure in described oil field operation safety joint passage is promoted to the second pressure by the first pressure, described interior
In the presence of pressure at the side at pipe axis two ends, said inner tube is in the axial direction from described primary importance movement to second
Put, the outer surface of tube wall of said inner tube is separated with described second position limiting structure, described second position limiting structure can be to described second
The activity of adapter channel interior direction, and separate with described first position limiting structure.
2. oil field operation safety joint according to claim 1 is it is characterised in that also include:
For said inner tube being positioned at second group of shear pin of the first position in the passage of described second adapter；
Jack insertion from described second adapter tube wall for the described second group of shear pin, and it is inserted into the jack on said inner tube tube wall
Interior.
3. oil field operation safety joint according to claim 1 is it is characterised in that also include:
Snap ring；
First groove of one ring-type is had on the outer surface of tube wall of said inner tube；
Second groove of one ring-type is had on the inner surface of tube wall of described second adapter；
The inner surface of tube wall pressure that described snap ring is taken over by described second sets elastic deformation in described first groove；
In said inner tube movement to the second position, at mobile extremely described second groove location of described snap ring, the outer shroud of described snap ring
To described second groove, the internal ring of described snap ring is located in described first groove for elastic deformation.
4. oil field operation safety joint according to claim 1 it is characterised in that
Said inner tube one end is inserted in the passage of described first adapter, and the other end of said inner tube is located at described second adapter
In passage；
First group of seal groove is provided with the outer surface of tube wall of said inner tube one end；
Second group of seal groove is provided with the outer surface of tube wall of the said inner tube other end；
It is provided with first group of o shape sealing ring, the tube wall of said inner tube one end and described first adapter in described first group of seal groove
By described first group of o shape sealing ring sealing between inwall；
It is provided with second group of o shape sealing ring, the tube wall of the said inner tube other end connects with described second in described second group of seal groove
By described second group of o shape sealing ring sealing between inside pipe wall.
5. according to described oil field operation safety joint arbitrary in Claims 1 to 4 it is characterised in that
Described first position limiting structure is the stopper slot on described first nozzle inner wall；
Described second position limiting structure includes at least one strip plate positioned at described second adapter one end and is located at described strip
Projection on plate；
Described strip plate is pressed on the inwall of described first adapter the outer surface of tube wall of said inner tube, and described projection is inserted into
In described stopper slot.
6. oil field operation safety joint according to claim 5 it is characterised in that
The first side of described projection is the stress surface with described stopper slot；
First outer surface of described strip plate is connected with the first side of described projection；
Angle between described first side and described first outer surface is obtuse angle；
When the outer surface of tube wall of said inner tube is separated with described strip plate, described first adapter is subject to outside with described second adapter
Pulling force, under the guiding of described first side, described projection moves in described stopper slot to described stopper slot, described strip
Plate is bent to the second form from the first form.
7. oil field operation safety joint according to claim 5 it is characterised in that
Described strip plate is elastic plate, and described strip plate is from the bending shape bending to said inner tube channel interior by said inner tube
Outer wall pressure be configured to straight bar shape；
When the outer surface of tube wall of said inner tube is separated with described strip plate, under the elastic restoring force of described strip plate acts on, institute
State strip plate and bend deformation to said inner tube channel interior, described projection moves to described stopper slot in described stopper slot.
8. oil field operation safety joint according to claim 5 it is characterised in that
Said inner tube includes the Part I positioned at described first area side side and is located at described second area side one
The Part II of side；
Described strip plate is pressed on the inwall of described first adapter the outer surface of tube wall of described Part I；
The outer surface of tube wall of described Part II is provided with the receiving space for accommodating described strip plate；
When the outer surface of tube wall of said inner tube is separated with described strip plate, described strip plate can be from the inwall of the described first adapter
On be bent in described receiving space, described projection in described stopper slot move to described stopper slot.
9. oil field operation safety joint according to claim 8 it is characterised in that
The external diameter of described Part I is less than the external diameter of described Part II, and the internal diameter of described Part I is equal to described second
The internal diameter dividing.
10. oil field operation safety joint according to claim 8 it is characterised in that
The external diameter of described Part I is equal to the external diameter of described Part II, and the internal diameter of described Part I is more than described second
The internal diameter dividing.
11. oil field operation safety joints according to claim 5 it is characterised in that
Described strip plate is a plurality of；
A plurality of strip plate is looped around described second adapter tube wall one week.
12. according to described oil field operation safety joint arbitrary in Claims 1 to 4 it is characterised in that
Jack on described first adapter tube wall and/or the jack on described second adapter tube wall are in described oil field operation safety
Bore size on joint length direction be more than described oil field operation with safety joint bore size in the radial direction；
Jack on described first adapter tube wall and/or the jack ovalize hole on described second adapter tube wall or diamond hole；
Jack on described first adapter tube wall and/or the side of the jack on described second adapter tube wall and described first group of shear pin
Wall is linear contact lay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346547.1A CN104929534B (en) | 2015-06-19 | 2015-06-19 | Safety connector for oil field working |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510346547.1A CN104929534B (en) | 2015-06-19 | 2015-06-19 | Safety connector for oil field working |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104929534A CN104929534A (en) | 2015-09-23 |
| CN104929534B true CN104929534B (en) | 2017-01-18 |
Family
ID=54116928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510346547.1A Active CN104929534B (en) | 2015-06-19 | 2015-06-19 | Safety connector for oil field working |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104929534B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625954B (en) * | 2016-01-12 | 2017-10-31 | 中国石油大学(华东) | Intelligent well completion safety device |
| CN110787918B (en) * | 2017-11-28 | 2020-12-11 | 海宁百丽丝染整有限责任公司 | Adjustable nozzle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2858927Y (en) * | 2005-10-24 | 2007-01-17 | 张宣来 | Sliding sucker rod safety joint |
| RU2296206C2 (en) * | 2005-03-02 | 2007-03-27 | Закрытое акционерное общество "Нефтемашвнедрение" | Disconnector |
| CN201007186Y (en) * | 2007-02-06 | 2008-01-16 | 大港油田集团有限责任公司 | Lifting safety joint |
| CN201056994Y (en) * | 2007-02-06 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic inverse-buckling safety joint |
| CN201212360Y (en) * | 2008-06-18 | 2009-03-25 | 北京华油油气技术开发有限公司 | Ring-releasing safety joint |
| CN204877305U (en) * | 2015-06-19 | 2015-12-16 | 安东石油技术（集团）有限公司 | Oil field is safety joint for operation |
-
2015
- 2015-06-19 CN CN201510346547.1A patent/CN104929534B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2296206C2 (en) * | 2005-03-02 | 2007-03-27 | Закрытое акционерное общество "Нефтемашвнедрение" | Disconnector |
| CN2858927Y (en) * | 2005-10-24 | 2007-01-17 | 张宣来 | Sliding sucker rod safety joint |
| CN201007186Y (en) * | 2007-02-06 | 2008-01-16 | 大港油田集团有限责任公司 | Lifting safety joint |
| CN201056994Y (en) * | 2007-02-06 | 2008-05-07 | 大港油田集团有限责任公司 | Hydraulic inverse-buckling safety joint |
| CN201212360Y (en) * | 2008-06-18 | 2009-03-25 | 北京华油油气技术开发有限公司 | Ring-releasing safety joint |
| CN204877305U (en) * | 2015-06-19 | 2015-12-16 | 安东石油技术（集团）有限公司 | Oil field is safety joint for operation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104929534A (en) | 2015-09-23 |
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