CN106761464B - Oil pipe buffer unit - Google Patents
Oil pipe buffer unit Download PDFInfo
- Publication number
- CN106761464B CN106761464B CN201611182701.7A CN201611182701A CN106761464B CN 106761464 B CN106761464 B CN 106761464B CN 201611182701 A CN201611182701 A CN 201611182701A CN 106761464 B CN106761464 B CN 106761464B
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- CN
- China
- Prior art keywords
- disc spring
- top connection
- oil pipe
- buffer unit
- piston
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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
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
Abstract
The invention discloses a kind of oil pipe buffer units comprising：Hollow top connection is provided with screw thread on the inside of upper part, lower part, and the inside of top connection is formed with the first limiting section；Lower contact in a tubular form, outside are provided with screw thread；In the piston of hollow revolution build, it is fed through lower contact, upper end is located in top connection, and lower end is located at outside lower contact, and screw thread is provided on the outside of lower end, and piston is formed with the second limiting section close to the position of upper end；The lower end of the seizure pipe being arranged in top connection, seizure pipe is fastened in the second limiting section, and distance the first limiting section in the upper end has preset distance；Opening is provided on the side wall of seizure pipe；It is formed with the first cavity between seizure pipe and top connection and the upper end of piston, magnet ring and disc spring are provided in the first cavity.Oil pipe buffer unit provided by the invention can effectively absorb the impact force generated during pumping pipe string use, and reducing big well workover probability and difficulty while can also reaching effectively relatively low has holddown phenomenon.
Description
Technical field
The present invention relates to technical field of oil production engineering, more particularly to a kind of oil pipe buffer unit.
Background technology
Currently, at the scene of recovering the oil, the rod string in oil well is with the frequency of 3 punchings beat/min to 12 punchings beat/min in oil pipe
It pumps in endoporus.Wherein, on the one hand being produced due to oil field development, include the well liquid of viscous crude, thin oil, high solidifying oil etc.
The physicochemical characteristics such as High water cut, high salinity may cause oil well pole eccentric wear, corrosion and scaling serious；On the other hand due to
The unreasonable of casing programme can also cause oil well pole eccentric wear, the oil well pole in above-mentioned oil well to be easy to cause oil well pump card
It pumps, touch pump phenomenon.Further, impact can be generated to all youngster's assemblies when holddown occurs or touches pump phenomenon.In addition, it is also possible to
What other reasons also resulted in touches the generation of pump phenomenon.On the whole, when touching pump, impact is generated to all youngster's assemblies and is easy to make
At all youngster's assembly failures of fixation, lead to overhauling operation, finally causing oil well output to reduce can not even exploit and easily cause peace
Complete and environmentally friendly accident.
Therefore, it is necessary to propose a kind of impact force that can effectively absorb and be generated during pumping pipe string use, reduction is repaiied
The device of well probability.
Invention content
The object of the present invention is to provide a kind of oil pipe buffer units, can effectively absorb generation during pumping pipe string use
Impact force, reducing big well workover probability and difficulty while can also reaching effectively relatively low has holddown phenomenon.
Following technical proposal can be used to realize in the above-mentioned purpose of the present invention：
A kind of oil pipe buffer unit, including
Hollow top connection is provided with the screw thread for connected pipes on the inside of upper part, is provided on the inside of its underpart
The inside of screw thread, the top connection is formed with the first limiting section；
Lower contact in a tubular form, outside are provided with the screw thread for connecting the top connection；
In the piston of hollow revolution build, it is fed through the lower contact, upper end is located in the top connection, the piston
Lower end be located at outside the lower contact, and screw thread is provided on the outside of lower end, the piston is formed with close to the position of upper end
Two limiting sections；
Seizure pipe in the top connection is set, the lower end of the seizure pipe is fastened in second limiting section,
Upper end has preset distance apart from first limiting section；Opening is provided on the side wall of the seizure pipe；The seizure pipe with
It is formed with the first cavity between the upper end of the top connection and the piston, magnet ring and dish are provided in first cavity
Spring.
In a preferred embodiment, the madial wall of the top connection is also formed with third limiting section, correspondingly, the oil
Pipe buffer unit further includes the spacer ring being arranged on the third limiting section.
In a preferred embodiment, the disc spring includes the first disc spring, the second disc spring and third disc spring, first dish
Spring, magnet ring, the second disc spring, spacer ring and third disc spring are sequentially distributed from top to bottom in first cavity.
In a preferred embodiment, first disc spring, the second disc spring and third disc spring respectively include multiple sub- disc springs,
The elastic displacement of the sub- disc spring is 0.1 millimeter to 0.4 millimeter.
In a preferred embodiment, the number of the opening is multiple, along being arranged circumferentially for the seizure pipe,
The position of the opening is opposite with the position of the magnet ring.
In a preferred embodiment, it is also formed between the piston, the top connection and the lower contact upper surface
Second cavity is additionally provided with the 4th disc spring in second cavity.
In a preferred embodiment, the 4th disc spring includes multiple sub- disc springs, and the elastic displacement of the sub- disc spring is
0.1 millimeter to 0.4 millimeter.
In a preferred embodiment, the material of the sub- disc spring be 65 manganese steel, and by quenching and 350 degrees Celsius extremely
500 degrees Celsius of tempers and rounded corner processing.
In a preferred embodiment, the material of the magnet ring is Nd-Fe-B permanent magnet.
In a preferred embodiment, the preset distance is 1 millimeter to 2 millimeters.
In a preferred embodiment, position of the top connection close to the inside and cooperation on the outside of the lower contact of lower end
It is provided with the first sealing ring；
The piston is provided with the second sealing ring close to the outside of upper end and the position of inside top connection cooperation；
The outside of the piston and the position of the lower contact fit inside are provided with third sealing ring；Wherein, described
The number of three sealing rings is more than the number of first sealing ring or second sealing ring.
The features and advantages of the invention are：By be arranged with the top connection of top pumping pipe string screwed connection and it is described on
The lower contact of connector screwed connection, and be threaded through the top connection, in lower contact and the seizure pipe that can move to axial and
Piston, wherein the lower end of the piston is provided with the screw thread being connect with lower part pumping pipe string, the seizure pipe and the top connection
And the first cavity is formed between the upper end of the piston, it is provided with magnet ring and disc spring in first cavity.In use, oily
Disc spring effect in pipe buffer unit can absorb peak load and itself generates elastic displacement, to avoid peak load from directly making
It for oil pipe thread junction, realizes to oil pipe thread Slow loading, greatly extend tubing life and reduces tubing string and is disconnected de-
Probability；In addition, be provided with the opening being connected with inside the top connection on the side wall of the seizure pipe, in order to connect on described
Described in being adsorbed on by the opening because of the product of beam hanger, the iron filings that oil pipe eccentric wear generates or the various corrosion of rod tube in fluid in head
On magnet ring in first cavity, to achieve the purpose that prevent holddown.Generally speaking, oil pipe buffer unit provided herein
The device of connection pumping pipe string with multiple functions such as capture, bufferings.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of oil pipe buffer unit in the application embodiment；
Fig. 2 is a kind of front view of oil pipe buffer unit disc spring in the application embodiment；
Fig. 3 is a kind of sectional view of oil pipe buffer unit disc spring in the application embodiment.
Reference sign：
Magnet ring -1；Spacer ring -2；Sub- disc spring -3；Fillet -30；First disc spring -31；Second disc spring -32- thirds disc spring -33；The
Four disc springs -34；Sealing ring -4；First sealing ring -41；Second sealing ring -42；Third sealing ring -43；Top connection -5；First limit
Position portion -51；Third limiting section -52；Lower contact -6；Fabrication hole -61；Piston -7；Second limiting section -71；Seizure pipe -8；Opening-
80；First cavity -91；Second cavity -92.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, elaborate to technical scheme of the present invention, it should be understood that these
Embodiment is only illustrative of the invention and is not intended to limit the scope of the invention, after having read the present invention, this field skill
Art personnel each fall in the application range as defined in the appended claims the modification of the various equivalent forms of the present invention.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", "upper",
"lower", "left", "right" and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
The present invention provides a kind of Multifunctional oil-pipe buffer unit for having and capturing with pooling feature, can effectively absorb oil pumping
The impact force generated during tubing string use reduces big well workover probability and difficulty while can also reach effectively relatively low has holddown existing
As.
Referring to Fig. 1, providing a kind of oil pipe buffer unit in the application embodiment comprising：Hollow top connection 5,
It is provided with the screw thread for connected pipes on the inside of upper part, screw thread, the inside of the top connection 5 are provided on the inside of its underpart
It is formed with the first limiting section 51；Lower contact 6 in a tubular form, outside are provided with the screw thread for connecting the top connection 5；In being in
The piston 7 of backlash swivel type is fed through the lower contact 6, and upper end is located in the top connection 5, lower end be located at it is described under
Outside connector 6, and screw thread is provided on the outside of lower end, the piston 7 is formed with the second limiting section 71 close to the position of upper end；Setting
The lower end of seizure pipe 8 in the top connection 5, the seizure pipe 8 is fastened in second limiting section 71, the upper end distance
First limiting section 51 has preset distance；Opening 80 is provided on the side wall of the seizure pipe 8；The seizure pipe 8 and institute
It states and is formed with the first cavity 91 between the upper end of top connection 5 and the piston 7, magnet ring 1 is provided in first cavity 91
And disc spring.
In the present embodiment, the top connection 5 can be in integrally hollow revolving body, and the hollow space is through hole,
It is provided with screw thread for being connected with oil pipe, the inside of its underpart is arranged with opposite upper and lower part on the inside of upper part
Have screw thread for and lower contact 6 connection.It is formed with the first limiting section 51, first limiting section in the inside of the top connection 5
51 are specifically as follows the step in the formation of the inside of the top connection 5, can be disc spring by setting first limiting section 51
Rest position is provided.
In the present embodiment, the lower contact 6 can be in hollow tubulose, and the hollow space is through hole, described
The outside of lower contact 6 is provided with screw thread, for matching with the screw thread of 5 lower inner liner of the top connection.Further, described
The lower part of top connection 5 and the cooperation of 6 screw thread of lower contact, is also provided with the first sealing ring 41, to ensure the lower contact 6 and institute
The leakproofness for stating 5 cooperation position of top connection prevents the leakage of oily liquid in pipe.Specifically, first sealing ring 41 can be O
Type sealing ring, number can be multiple, such as can be 2,3,4 etc., and the application does not make specific limit herein
It is fixed.When the number of first sealing ring 41 is multiple, it can preferably ensure that the top connection 5 coordinates position with lower contact 6
The leakproofness set.
In addition, pin is also provided between the top connection 5 and the lower contact 6, to prevent the top connection 5
Screw thread between lower contact 6 is got loose in use.It can also be set on outer wall of the lower contact 6 close to lower end
It is equipped with the fabrication hole 61 of installation, in order to which installation tool is inserted into the fabrication hole 61, lower contact 6 is rotated, makes itself and top connection 5
Connection.
In the present embodiment, it is in hollow revolution build that the piston 7 is whole, and entirety is fed through the lower contact 6,
Upper end is located in the top connection 5, and lower end is located at outside the lower contact 6.The piston is provided with screw thread on the outside of 7 lower end, uses
It is connected in oil pipe.It is formed with the second limiting section 71 close to the position of upper end in the piston 7, which is used for
Seizure pipe 8 is set.Specifically, second limiting section 71 can be the limited step formed in 7 upper end of the piston, it is described to catch
Catching pipe 8 can be fastened in the limited step.
In the present embodiment, the piston 7 is also set close to the outside of upper end and the position of 5 fit inside of the top connection
It is equipped with the second sealing ring 42, to ensure the leakproofness of the piston 7 and 5 cooperation position of top connection, prevents letting out for oily liquid in pipe
Leakage.Specifically, second sealing ring 42 can be O-ring seal, number can be it is multiple, such as can be 2,3,
4 etc., the application does not make specific limit herein.It, can be preferable when the number of second sealing ring 42 is multiple
Ground ensures the leakproofness of the top connection 5 and 7 cooperation position of piston.
In the present embodiment, the outside of the piston 7 and the position of 6 fit inside of the lower contact are additionally provided with third
Sealing ring 43 prevents the leakage of oily liquid in pipe to ensure the leakproofness of the piston 7 and 6 cooperation position of the lower contact.Tool
Body, second sealing ring 42 can be O-ring seal, number can be it is multiple, such as can be 2,3,4,5
It is a, 6 etc., the application does not make specific limit herein.Due to being that activity is matched between the piston 7 and the lower contact 6
Close, therefore, the number of the third sealing ring 43 can be oppositely arranged it is some more, for example, 5 or more, when the third
When the number setting of sealing ring 43 is more, it can preferably ensure the sealing of the lower contact 6 and the movable cooperation position of piston 7
Property, prevent fluid from being leaked out from the position.
In the present embodiment, the generally hollow tube body of the seizure pipe 8 is arranged in the top connection 5.It is described
There are seizure pipe 8 opposite top and bottom, lower end to be positioned by second limiting section 71, described in the distance of the upper end
First limiting section 51 has preset distance.The preset distance is moved when the piston 7 relative to the lower contact 6 for ensureing,
When compressing disc spring, the piston 7 has mobile surplus.Specifically, the preset distance can be 1 millimeter to 2 millimeters, certain institute
Stating the concrete numerical value of preset distance can be adaptively adjusted according to the demand of actual pumping pipe string, and the application is herein not
Make specific limit.
At least one opening 80 is provided on the side wall of the seizure pipe 8, the opening 80 is passed through with the top connection 5
Through-hole is connected.The first cavity 91 is formed between the seizure pipe 8 and the upper surface of the top connection 5 and the piston 7,
It is provided with magnet ring 1 and disc spring in first cavity 91.
Wherein, first cavity 91 specifically can be in annular shape, can by the seizure pipe 8 lateral wall with it is described
The step surface and the upper surface of madial wall below and the piston 7 that 5 inside of top connection is formed cooperatively form.
Wherein, the disc spring, which can be used for effectively absorbing, touches the impact force that pump generates all youngster's assemblies, reduces big well workover probability.
Specifically, the disc spring may include multiple sub- disc springs, such as it can be 20 to 40 etc..Specifically, the sub- dish
The number of spring can accordingly be set according to the size of practical oil pipe column required buffer power, and the application does not make to have herein
The restriction of body.
Fig. 2 to Fig. 3 is please referred to, whole every a sub- disc spring 3 can be in circular, the position in face and face boundary, with
And the position etc. of boundary chamfering is provided with fillet 30, is heat-treated at the wedge angle and chamfering so as to greatly reduce interface generation
When generated crackle tendency；In addition fillet 30 can also reduce the stress concentration phenomenon during use.In addition, the sub- disc spring
3 material can be 65Mn (manganese steel), by quenching and 350 degrees Celsius to heat treatments such as 500 degrees Celsius of average temperings.On the whole
It can ensure the fatigue life of the sub- disc spring 3 up to 3,000,000 times, limit load is 40 tons to 60 tons, and elastic displacement is 0.1 millimeter
To 0.4 millimeter, for existing common disc spring, has and efficiently use performance and longer service life, it can be complete
Adapt to the various complex working conditions of oil well.
In general, when sucker rod is together with plunger upstroke, fluid column weight is born by sucker rod and plunger in oil pipe, tubing string
It is subjected only to itself load.When sucker rod is together with plunger down stroke, fluid column weight is born by tubing string and pump barrel in oil pipe.Upper and lower
Stroke switching instant, fluid column weight, which instantaneously acts on generated peak load on tubing string, can exceed normal duty after conversion
30%-50%.It is generally strength weak link at tubing string screwed connection, after certain fatigue life, is acted in peak load
Under be easy to happen disconnected de-, lead to big well workover accident.And the disc spring effect in the oil pipe buffer unit can absorb peak load simultaneously certainly
Body generates elastic displacement and is realized slow to oil pipe thread to avoid peak load from directly acting on oil pipe thread junction
Load greatly extends tubing life and reduces the disconnected de- probability of tubing string.
In addition, tubing string is serious using aging phenomenon after the several years, it is disconnected it is de- after fall within shaft bottom moment and generate powerful impact
Tubing string can be made to be broken into several sections or bending, increase overhaul difficulty.And the disc spring of the oil pipe buffer unit can effectively absorb impact,
The probability that tubing string fracture or bending are reduced by itself displacement deformation, to reduce oil-water well overhaul difficulty.
In the present embodiment, the magnet ring 1 is arranged uses in first cavity 91 being connected with above-mentioned top connection 5
In capturing the iron filings in fluid, prevent iron filings from entering in oil well pump, it can effective relatively low holddown probability so that oil pipe buffering
Device has capture function.
Specifically, the magnet ring 1 can be in integrally annular shape, size can be with the size phase of first cavity 91
Match, specific the application does not make specific limit herein.The material of the magnet ring 1 is Nd-Fe-B permanent magnet.The magnet ring 1 passes through
The high temperature resistant type Nd-Fe-B permanent magnet material of magnetic field intensity up to 50 Gausses are made, and firmly can capture and adsorb sucker rod, oil pipe
The product of iron filings or the various corrosion of rod tube that eccentric wear generates, reaching prevents holddown purpose.
In the present embodiment, it is provided on the side wall of the seizure pipe 8 and to be connected with the through hole of the top connection 5
Opening 80, in order in the fluid in the top connection 5 because beam hanger, oil pipe eccentric wear generate iron filings or the various corrosion of rod tube production
Object is adsorbed on by the opening 80 on the magnet ring 1 in first cavity 91, to achieve the purpose that prevent holddown.Specifically,
It is described opening 80 number can be it is multiple, it is the multiple opening 80 being arranged circumferentially along the seizure pipe 8, from
And can be adsorbed as much as possible by the magnet ring 1 convenient for the iron filings in fluid, prevent holddown.In addition, the position of the opening 80
Setting can be opposite with the position of the magnet ring 1, specifically, the altitude range where the opening 80 can coat the magnet ring 1
Position, in order to shorten the iron filings in fluid at a distance from the magnet ring 1, ensure iron filings can be reliably by the magnet ring 1
Absorption.
Oil pipe buffer unit provided herein, by the top connection 5 of setting and top pumping pipe string screwed connection, and
The lower contact 6 of 5 screwed connection of the top connection, and be threaded through the top connection 5, in lower contact 6 and can move to axial
Seizure pipe 8 and piston 7, wherein the lower end of the piston 7 is provided with the screw thread being connect with lower part pumping pipe string, the seizure pipe
It is formed with the first cavity 91 between 8 and the upper end of the top connection 5 and the piston 7, is provided in first cavity 91
Magnet ring 1 and disc spring.In use, the disc spring effect in oil pipe buffer unit can absorb peak load and itself generates elastic displacement,
To avoid peak load from directly acting on oil pipe thread junction, realizes to oil pipe thread Slow loading, greatly extend oil
Tube lifetime simultaneously reduces the disconnected de- probability of tubing string；In addition, being provided on the side wall of the seizure pipe 8 and 5 inside phase of the top connection
The opening 80 of connection, in order in the fluid in the top connection 5 because beam hanger, oil pipe eccentric wear generate iron filings or the various corruption of rod tube
The product of erosion is adsorbed on by the opening 80 on the magnet ring 1 in first cavity 91, to achieve the purpose that prevent holddown.It is whole
For body, oil pipe buffer unit provided herein has the device for the connection pumping pipe string for the multiple functions such as capturing, buffering.
As shown in Figure 1, the madial wall of the top connection 5 is also formed with third limiting section 52, phase in one embodiment
It answers, the oil pipe buffer unit further includes the spacer ring 2 being arranged on the third limiting section 52.Correspondingly, the disc spring can
To include the first disc spring 31, the second disc spring 32 and third disc spring 33, first disc spring 31, magnet ring 1, the second disc spring 32, spacer ring
2, third disc spring 33 is sequentially distributed from top to bottom in first cavity 91.
Specifically, the third limiting section 52 can be the limited step formed on 5 madial wall of the top connection.The limit
Position step is used to, against the spacer ring 2, limit its upward axial movement.The spacer ring 2 is used to carry out adjacent sub- disc spring 3
Positioning ensures that the disc spring group that multiple sub- disc springs 3 are composed has preferable axial damping effect.
In the present embodiment, first disc spring 31, the second disc spring 32 and third disc spring 33 respectively include multiple sub- dish
Spring 3.
Specifically, 3 numbers of sub- disc spring that first disc spring 31, the second disc spring 32, third disc spring 33 are included can be with for 6
It is a.Certainly, 3 numbers of sub- disc spring that first disc spring 31, the second disc spring 32, third disc spring 33 respectively contain can also be more than 6
It is a or be less than 6, it can be adjusted correspondingly according to actual tubing string stress, the application does not make specific herein
It limits.
As shown in Figure 1, since first cavity 91 is used to be arranged the size of 2 position below of the spacer ring compared with spacer ring 2
Above position is relatively large, and first disc spring 31, the size of sub- disc spring 3 in the second disc spring 32 can be identical, and described
The size of the sub- disc spring 3 of three disc springs 33 can be more than first disc spring 31, the size of the sub- disc spring 3 of the second disc spring 32, to match
Close the size of first cavity 91.Certainly, first disc spring 31, the second disc spring 32 and the corresponding sub- disc spring of third disc spring 33
3 size can be adaptively adjusted according to the difference of the size of the first cavity 91, and the application does not make specific limit herein
It is fixed.
In one embodiment second is also formed between 6 upper surface of the piston 7, top connection 5 and the lower contact
Cavity 92 is additionally provided with the 4th disc spring 34 in second cavity 92.4th disc spring 34 may include multiple sub- disc springs 3.
In the present embodiment, the global shape of second cavity 92 can be in annular shape, can be by the outer of piston 7
The upper surface of side wall, the madial wall of top connection 5 and the lower contact 6 is formed.It is provided with the 4th dish in second cavity 92
Spring 34, for matching the pooling feature realized to tubing string with first disc spring 31, the second disc spring 32 and third disc spring 33.
Specifically, the 4th disc spring 34 may include multiple sub- disc springs 3, the number of the sub- disc spring 3 can be according to practical tubing string
Stressing conditions set accordingly, the application does not make specific limit herein.As shown in figure 3, the 4th disc spring 34
May include 3 sub- disc springs, the size of the 4th disc spring 34 can be identical as the size of the third disc spring 33.
When oil well pump is in upstroke, piston 7 moves relatively upward, compresses first disc spring 31, the second disc spring 32
With third disc spring 33；When the oil well pump is in down stroke, piston 7 moves down under the effect of gravity, first disc spring
31, the second disc spring 32 and third disc spring 33 reset, while the 4th disc spring 34 is compressed, to be connected with it to the piston 7
The tubing string connect plays cushioning effect.
Above-mentioned each embodiment in this specification is described in a progressive manner, identical between each embodiment
Similar portion is cross-referenced, and what each embodiment stressed is and other embodiment difference.
The foregoing is merely several embodiments of the invention, although disclosed herein embodiment it is as above, institute
Content is stated only to facilitate the embodiment for understanding the present invention and using, is not intended to limit the present invention.Any institute of the present invention
State those skilled in the art, do not depart from disclosed herein spirit and scope under the premise of, can be in embodiment
Formal and details on make any modification and variation, but the scope of patent protection of the present invention still must be with appended claims
Subject to the range that book is defined.
Claims (11)
1. a kind of oil pipe buffer unit, which is characterized in that including
Hollow top connection is provided with the screw thread for connected pipes on the inside of upper part, screw thread is provided on the inside of its underpart,
The inside of the top connection is formed with the first limiting section；
Lower contact in a tubular form, outside are provided with the screw thread for connecting the top connection；
In the piston of hollow revolution build, it is fed through the lower contact, upper end is located in the top connection, under the piston
End is located at outside the lower contact, and screw thread is provided on the outside of lower end, and the piston is formed with the second limit close to the position of upper end
Position portion；
Seizure pipe in the top connection is set, and the lower end of the seizure pipe is fastened in second limiting section, the upper end
There is preset distance apart from first limiting section；Opening is provided on the side wall of the seizure pipe；The seizure pipe with it is described
It is formed with the first cavity between the upper end of top connection and the piston, magnet ring and disc spring are provided in first cavity.
2. oil pipe buffer unit as described in claim 1, which is characterized in that the madial wall of the top connection is also formed with third
Limiting section, correspondingly, the oil pipe buffer unit further includes the spacer ring being arranged on the third limiting section.
3. oil pipe buffer unit as claimed in claim 2, which is characterized in that the disc spring includes the first disc spring, the second disc spring
With third disc spring, first disc spring, magnet ring, the second disc spring, spacer ring and third disc spring in first cavity from top to bottom
It is sequentially distributed.
4. oil pipe buffer unit as claimed in claim 3, which is characterized in that first disc spring, the second disc spring and third dish
Spring respectively includes multiple sub- disc springs, and the elastic displacement of the sub- disc spring is 0.1 millimeter to 0.4 millimeter.
5. oil pipe buffer unit as claimed in claim 3, which is characterized in that the number of the opening is multiple, along described
Seizure pipe is arranged circumferentially, and the position of the opening is opposite with the position of the magnet ring.
6. oil pipe buffer unit as described in claim 1, which is characterized in that the piston, the top connection and it is described under connect
Head is also formed with the second cavity between upper surface, and the 4th disc spring is additionally provided in second cavity.
7. oil pipe buffer unit as claimed in claim 6, which is characterized in that the 4th disc spring includes multiple sub- disc springs, institute
The elastic displacement for stating sub- disc spring is 0.1 millimeter to 0.4 millimeter.
8. the oil pipe buffer unit as described in claim 4 or 7, which is characterized in that the material of the sub- disc spring is 65 manganese steel, and
By quenching and 350 degrees Celsius to 500 degrees Celsius tempers and rounded corner processing.
9. oil pipe buffer unit as described in claim 1, which is characterized in that the material of the magnet ring is Nd-Fe-B permanent magnet.
10. oil pipe buffer unit as described in claim 1, which is characterized in that the preset distance is 1 millimeter to 2 millimeters.
11. oil pipe buffer unit as described in claim 1, which is characterized in that
The top connection is provided with the first sealing ring close to the inside of lower end with the position coordinated on the outside of the lower contact；
The piston is provided with the second sealing ring close to the outside of upper end and the position of inside top connection cooperation；
The outside of the piston and the position of the lower contact fit inside are provided with third sealing ring；Wherein, the third is close
The number of seal is more than the number of first sealing ring or second sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182701.7A CN106761464B (en) | 2016-12-20 | 2016-12-20 | Oil pipe buffer unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611182701.7A CN106761464B (en) | 2016-12-20 | 2016-12-20 | Oil pipe buffer unit |
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| Publication Number | Publication Date |
|---|---|
| CN106761464A CN106761464A (en) | 2017-05-31 |
| CN106761464B true CN106761464B (en) | 2018-08-10 |
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| CN201611182701.7A Active CN106761464B (en) | 2016-12-20 | 2016-12-20 | Oil pipe buffer unit |
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|---|---|---|---|---|
| US7044240B2 (en) * | 2002-12-20 | 2006-05-16 | Mcneilly Keith | Torque absorber for downhole drill motor |
| CN201301672Y (en) * | 2008-12-05 | 2009-09-02 | 重庆望江工业有限公司 | Full-hydraulic drilling string shock absorber |
| RU2467150C2 (en) * | 2011-02-25 | 2012-11-20 | Общество с ограниченной ответственностью "Фирма "Радиус-Сервис" | Drill string damper |
| CN202001283U (en) * | 2011-03-31 | 2011-10-05 | 李广青 | Strong magnetic rod oil well pump protector |
| CN202140034U (en) * | 2011-04-15 | 2012-02-08 | 盐城市佳鑫石化机械制造有限公司 | Tubular column expansion compensator capable of transferring torque |
| CN102913145A (en) * | 2012-10-29 | 2013-02-06 | 陕西联盟物流有限公司 | Hydraulic mechanical drill stem damper |
| US9988859B2 (en) * | 2014-07-07 | 2018-06-05 | Klx Energy Services Llc | Impact dampening apparatus |
| CN105545223A (en) * | 2016-01-29 | 2016-05-04 | 贵州高峰石油机械股份有限公司 | Drill bit damping method and disc spring bidirectional damper |
| CN205605135U (en) * | 2016-01-29 | 2016-09-28 | 贵州高峰石油机械股份有限公司 | Dish spring double -acting shock absorber |
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2016
- 2016-12-20 CN CN201611182701.7A patent/CN106761464B/en active Active
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