CN208870548U - The hydraulic micro- rotation safety joint of down-hole string - Google Patents
The hydraulic micro- rotation safety joint of down-hole string Download PDFInfo
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- CN208870548U CN208870548U CN201821680794.0U CN201821680794U CN208870548U CN 208870548 U CN208870548 U CN 208870548U CN 201821680794 U CN201821680794 U CN 201821680794U CN 208870548 U CN208870548 U CN 208870548U
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Abstract
The utility model relates to a kind of hydraulic micro- rotation safety joints of down-hole string, including top connection and lower contact, it the centre bore coaxial line of two connectors and is mutually communicated, lower contact upper end is equipped with the cylinder upwardly extended, cylinder lumen is equipped with can be along cylinder inboard wall sliding sleeve in axial sliding, the centre bore of sliding sleeve is gradually reduced from top to bottom and lower end is equipped with the ball seat of bell mouth shape, and ball seat is configured with the steel pitching that can be turned off, and aditus laryngis and the lower contact centre bore of ball seat lower end connect；The lower end outer wall of sliding sleeve is fixed on cylinder by shear pin, and top connection lower part is mutually chimeric with the inner wall of cylinder after being inserted in cylinder and rotating, and the lower end of top connection is plugged by the upper end of spline and sliding sleeve.The middle section of top connection is equipped with top connection outer step, and top connection outer step is pressed in cylinder upper port, and top connection outer step position diameter below reduces paragraph by paragraph；Cylinder lumen reduces section by section from top to bottom.The safety joint is easy to operate, is not influenced by string friction and hole deviation, and it is high to disengage success rate.
Description
Technical field
The utility model relates to a kind of safety joint, in particular to the hydraulic micro- rotation safety joint of a kind of down-hole string belongs to
In helicoid hydraulic motor technical field.
Background technique
Safety joint is a kind of auxiliary tool applied to underground work and flow string.It, can when lock of tool drilling occurs
Card tubing string will be met to disengage from safety joint place, to create good condition for being further processed for accident.Currently, oil field is common
The main sawtooth pattern of safety joint and square two kinds of button-type, both safety joints are made of top connection, lower contact and sealing ring.On
Upper end of joint has the internal screw thread being connected with tubing string, and there is wide sawtooth external screw thread in lower half.External cylindrical surface between this two parts
On have " splayed " convex-concave structure.There is the external screw thread being connected with tubing string in lower contact lower end, inside has wide sawtooth internal screw thread, connects under
There is " splayed " convex-concave structure matched with top connection in the upper surface of head.
It is to be connected through a screw thread between the upper lower contact of both safety joints, for transmitting positive reaction torque；And above it
" splayed " convex-concave structure be to generate pretension and the locking device that keeps constant.When losing de-, safety joint is applied first
Add it is certain under hit power and reaction torque, be allowed to disengage.Just because of threaded connection, and the torque and tubing string hand of spiral phase applied
Instead, it is influenced by the frictional resistance and hole deviation of tubing string and casing wall, torque and tubing string weight transmitting are very difficult, usually move back
The phenomenon that not opening.
Utility model content
The purpose of this utility model is that overcome problems of the prior art, a kind of down-hole string is provided with hydraulic
Micro- rotation safety joint, it is easy to operate, it is not influenced by the frictional resistance and hole deviation of tubing string and casing wall, it is high to disengage success rate.
In order to solve the above technical problems, the hydraulic micro- rotation safety joint of a kind of down-hole string of the utility model, including it is upper
It the centre bore coaxial line of connector and lower contact, the top connection and lower contact and is mutually communicated, the upper end of the lower contact is equipped with
The cylinder upwardly extended, the inner cavity of the cylinder is equipped with can be along cylinder inboard wall sliding sleeve in axial sliding, the center of the sliding sleeve
Hole is gradually reduced from top to bottom and lower end is equipped with the ball seat of bell mouth shape, and the ball seat is configured with the steel that can be turned off and throws
Ball, the aditus laryngis of the ball seat lower end and the centre bore of the lower contact connect；The lower end outer wall of the sliding sleeve is solid by shear pin
It is scheduled on the cylinder, institute mutually chimeric with the inner wall of cylinder after the lower part of the top connection is inserted in the cylinder and rotates
The lower end for stating top connection is plugged by the upper end of spline and the sliding sleeve.
Compared with the existing technology, the utility model achieves following the utility model has the advantages that when assembling, and sliding sleeve is first put into cylinder
In, then by the lower end insertion cylinder lumen of top connection, then rotating top connection keeps the lower part of top connection and the inner wall of cylinder mutually embedding
It closes, axial tension can be not only born between such top connection and cylinder, but also torque can be transmitted；Then sliding sleeve jacks up upwards, makes
The upper end of sliding sleeve is connected with the lower end of top connection by spline, and then sliding sleeve is fixed on cylinder by shear pin, is thus slided
Set limits the rotation of top connection and provides torque.When safety joint being needed to put aside, steel pitching is put into tubing string, steel pitching is fallen
Set at ball seat, central duct closing generated and is built the pressure, is built the pressure when reaching 10MPa, shear pin is cut, sliding sleeve slides downwards with above connect
Head is detached from, and is rotated backward top connection at this time and is allowed to chimeric with cylinder inboard wall disengaging, then top connection can be drawn upwardly out, and realization is lost
Hand.It is threadedly coupled due to not used between top connection and cylinder, but uses mutually chimeric, mutual binding force very little, given up
When, it is not influenced by the frictional resistance and hole deviation of tubing string and casing wall, as long as investment steel pitching and rotation top connection slightly
Tripping disengages success rate height, easy to operate, reliable performance.
As the improvement of the utility model, the middle section of the top connection is equipped with top connection outer step, the top connection between outer land
Rank is pressed in the upper port of cylinder, and the top connection outer step position diameter below reduces paragraph by paragraph；The inner cavity of the cylinder is certainly
Above have the cylinder stepped hole that multiple apertures reduce section by section.Top connection outer step can be inserted into the depth of cylinder to top connection
Axially position is carried out, when top connection outer step is pressed in the upper port of cylinder, can be rotated, is realized chimeric；Top connection and
Section by section on the one hand undergauge is convenient for turnery processing to cylinder from top to bottom, the mutual cooperation being on the other hand also convenient between each section.
The periphery of top connection enlarged diameter section below the top connection outer step as a further improvement of the utility model,
Three pieces of top connection convex blocks are uniformly provided with, the central angle of each top connection convex block is respectively 40 °, the first cylinder platform of the cylinder upper end
The inner wall in rank hole is symmetrically arranged with L shape caulking groove compatible with top connection convex block, the upper end opening of each L shape caulking groove and the center of circle on top
Angle is 40 °, and the central angle of each L shape caulking groove lower part is 80 °, and the total height of each L shape caulking groove is twice of top connection bump height, and
Each top connection convex block is embedded in the root of corresponding L shape caulking groove respectively.Each top connection convex block is inserted from the opening of L shape caulking groove upper end respectively
Enter, glide downwards are equivalent to the bottom of arrival L shape caulking groove after the height of top connection convex block, then rotate 40 °, make top connection convex block
It is completely embedded into the root of L shape caulking groove.Since the total height of L shape caulking groove is twice of top connection convex block, central angle is also top connection
Twice of convex block, top connection convex block are embedded into after position, top is overlapped completely with the roof of L shape caulking groove lower part, axially position with
Radial positioning is very reliable, and the ability for transmitting pulling force and torque is very big.When giving up, top connection reversely rotates 40 °, above mentions
Disengaging can be realized in tubing string.
The lower section of the top connection enlarged diameter section is equipped with top connection seal section as a further improvement of the utility model,
The circumference of the top connection seal section is equipped at least twice top connection seal groove, is embedded in the top connection seal groove and above connects
Head sealing ring is fitted in the inner wall of the second cylinder stepped hole.Top connection sealing ring can be realized reliable close between top connection and cylinder
Envelope, and processing, installation can be convenient, top connection sealing ring not will receive scraping for cylinder inboard wall before being inserted into the second cylinder stepped hole
It rubs.
The lower end of the top connection seal section is connected with top connection minor diameter as a further improvement of the utility model,
Section, the top connection reduced diameter section is plugged in the top of third cylinder stepped hole, and the periphery of top connection reduced diameter section is symmetrically set
There are three being recessed inwardly and the top connection slot of lower ending opening, the top connection slot and the top connection convex block are circumferentially
Phase mutually staggers；The top of the sliding sleeve is equipped with sliding sleeve enlarged diameter section, and the sliding sleeve enlarged diameter section is located at third cylinder step
The middle part and the two clearance fit, the upper port periphery of the sliding sleeve enlarged diameter section in hole are symmetrically arranged with three sliding sleeves stretched out upwards
Plug tenon, each sliding sleeve plug tenon correspondence are plugged in corresponding top connection slot；The central angle of each sliding sleeve plug tenon is respectively 40 °, it is each on
The central angle of connector slot is respectively 80 °.Corresponding be plugged in top connection slot of each sliding sleeve plug tenon forms spline fitted, and sliding sleeve is inserted
The inner wall of tenon is resisted against on the bottom wall of top connection slot, guarantees the lower end coaxial line of sliding sleeve upper end and top connection, sliding sleeve plug tenon
Side wall contacts transmitting torque with the side wall of top connection slot, and top connection slot and the phase of top connection convex block circumferentially are mutually wrong
It opens easy to process.The central angle of top connection slot is equal with the central angle of L shape caulking groove lower part, the central angle of sliding sleeve plug tenon with above connect
The central angle of head convex block is equal, while so that top connection convex block is embedded in L shape caulking groove root, the side wall of sliding sleeve plug tenon and top connection
The side wall of slot fits, and synchronously arrives at the state of transmitting torque.
The excircle of the sliding sleeve enlarged diameter section is symmetrically arranged with three along axial direction as a further improvement of the utility model,
The sliding sleeve sliding slot of perforation, the central angle of each sliding sleeve sliding slot are respectively 40 ° and mutually wrong in circumferential phase with the sliding sleeve plug tenon
It opens；The upper inside wall of the third cylinder stepped hole is symmetrically arranged with three inwardly projecting cylinder convex blocks, the circle of each cylinder convex block
Heart angle is respectively 40 ° and corresponds in corresponding sliding sleeve sliding slot.Before shear pin is cut, cylinder convex block makes in sliding sleeve sliding slot
Radial positioning is realized between sliding sleeve and cylinder and can transmit torque；Sliding sleeve sliding slot is mutually wrong in circumferential phase with sliding sleeve plug tenon
Opening can be weakened to avoid the root of sliding sleeve plug tenon.After shear pin is cut, the cooperation of cylinder convex block and sliding sleeve sliding slot is so that sliding sleeve
It slides axially downward.
It is connected with sliding sleeve reduced diameter section below the sliding sleeve enlarged diameter section as a further improvement of the utility model,
The top of the sliding sleeve reduced diameter section is located in the third cylinder stepped hole, is located at below the middle part of the sliding sleeve reduced diameter section
In 4th cylinder stepped hole, the middle part of the sliding sleeve reduced diameter section is equipped at least twice sliding sleeve seal groove, the sliding sleeve seal groove
Middle to be embedded with sliding sleeve sealing ring respectively, the sliding sleeve sealing ring is fitted in the inner wall of the 4th cylinder stepped hole.Sliding sleeve reduced diameter section
Top be located in third cylinder stepped hole the bottom of sliding sleeve enlarged diameter section made to be higher by one than the step of third cylinder stepped hole
Section distance, when to give up, the downslide of sliding sleeve enlarged diameter section and the disengagement of sliding sleeve plug tenon provide space.Sliding sleeve sealing ring realizes
The sealing of sliding sleeve and cylinder inboard wall, and with the cylinder inboard wall on top without scratch.
Two shear pin screw holes are symmetrically arranged in the lower circumference of the cylinder as a further improvement of the utility model,
The shear pin is screwed in two shear pin screw holes respectively, the inner termination of two shear pins is plugged on respectively in the shear pin counterbore of the sliding sleeve,
The shear pin counterbore is contour in short transverse and the throat site below the ball seat.The wall thickness of throat site is most thick, and intensity is most
Height is conducive to arrange shear pin counterbore；Shear pin inner termination is plugged in the shear pin counterbore of sliding sleeve, and sliding sleeve is fixed on cylinder；When
The pressure that sliding sleeve is born is sufficiently large, and shear pin will be cut.
Twice edge is symmetrically arranged in the lower circumference of the sliding sleeve reduced diameter section as a further improvement of the utility model,
The sliding sleeve that axis upwardly extends limits elongated slot, and the axial height of the sliding sleeve limit elongated slot is greater than the height of the sliding sleeve plug tenon；Institute
It states and is symmetrically screwed with position-limitting pin on the circumference of cylinder, the position-limitting pin and the shear pin are located on the same circumference and mutual
It is staggered 90 °, the inner termination of each position-limitting pin is plugged on respectively in corresponding sliding sleeve limit elongated slot.The inner termination of position-limitting pin is symmetrical
It is plugged in sliding sleeve limit elongated slot, so that sliding sleeve can only will not rotate along straight line slide downward in sliding process；Maintenance
Afterwards, be screwed on shear pin again on cylinder, and the inner termination of shear pin is extremely easy to align with the shear pin counterbore of sliding sleeve, sliding sleeve plug tenon and sliding sleeve
The phase of sliding slot will not change, and eliminate the trouble of rotation centering.
The 4th cylinder stepped hole inner wall above the shear pin screw hole is equipped with interior as a further improvement of the utility model,
The cylinder relief groove of diameter amplification, when getting out of a predicament or an embarrassing situation for the sliding sleeve enlarged diameter section is resisted against appearing on the stage for the 4th cylinder stepped hole
When on rank, the sliding sleeve sealing ring is located in the cylinder relief groove, and the top of the sliding sleeve plug tenon is detached from described and connects
Head insertion slot；The lower section of the 4th cylinder stepped hole is equipped with the 5th cylinder stepped hole.After steel pitching is put into tubing string, in ball seat
Place is set, and central duct is built the pressure to pressure of giving up, shear pin is cut, and after sliding sleeve slides downwards, sliding sleeve plug tenon and top connection slot are de-
It is reached at cylinder relief groove from, sliding sleeve sealing ring, is relaxed the hydraulic of top, thus ground handling operator judges can be after
It is continuous to carry out operation of giving up, that is, 40 ° of top connection are rotated backward, then upper lifting pipe post, realizes and be detached from.The lower section of 4th cylinder stepped hole
Centre bore equipped with the smaller 5th cylinder stepped hole of internal diameter as lower contact can slide into the tubing string of lower section to avoid sliding sleeve.
Detailed description of the invention
Utility model will be further described in detail below with reference to the attached drawings and specific embodiments, and attached drawing only provides ginseng
It examines and illustrates to use, it is non-to limit the utility model.
Fig. 1 is main view of the utility model down-hole string with hydraulic micro- rotation safety joint.
Fig. 2 is the cross-sectional view of top connection in Fig. 1.
Fig. 3 is the perspective view one of top connection in Fig. 1.
Fig. 4 is the perspective view two of top connection in Fig. 1.
Fig. 5 is the cross-sectional view of Fig. 1 middle cylinder body.
Fig. 6 is the three-dimensional cutaway view of Fig. 1 middle cylinder body.
Fig. 7 is the cross-sectional view of sliding sleeve in Fig. 1.
Fig. 8 is the perspective view one of sliding sleeve in Fig. 1.
Fig. 9 is the cross-sectional view of Fig. 8.
Figure 10 is the perspective view two of sliding sleeve in Fig. 1.
In figure: 1. top connections；1a. top connection outer step；1b. top connection enlarged diameter section；1b1. top connection convex block；On 1c.
Joint sealing section；1c1. top connection seal groove；1c2. top connection sealing ring；1d. top connection reduced diameter section；1d1. top connection is inserted
Slot；1e. taper box thread；2. cylinder；2a. the first cylinder stepped hole；2a1.L shape caulking groove；2b. the second cylinder stepped hole；2c.
Three cylinder stepped holes；2c1. cylinder convex block；The 4th cylinder stepped hole of 2d.；2d1. shear pin screw hole；2d2. cylinder relief groove；2e.
5th cylinder stepped hole；3. lower contact；3a. taper male thread；4. sliding sleeve；4a. sliding sleeve plug tenon；4b. sliding sleeve enlarged diameter section；4b1.
Sliding sleeve sliding slot；4c. sliding sleeve reduced diameter section；4c1. sliding sleeve seal groove；4c2. sliding sleeve sealing ring；4c3. shear pin counterbore；4c4. sliding sleeve
Limit elongated slot；4d. ball seat；5. shear pin；6. position-limitting pin；7. steel pitching.
Specific embodiment
As shown in Figures 1 to 10, the hydraulic micro- rotation safety joint of the down-hole string of the utility model includes top connection 1 under
Connector 3, the upper lumen of top connection 1 are equipped with the taper box thread 1e being mutually screwed on top tubing string, the outer end of lower contact 3 be equipped with
The taper male thread 3a that lower section tubing string is mutually screwed on.It the centre bore coaxial line of top connection 1 and lower contact 3 and is mutually communicated, lower contact 3
Upper end be equipped with the cylinder 2 that upwardly extends, the inner cavity of cylinder 2 is equipped with can be along 2 inner wall of cylinder sliding sleeve 4 in axial sliding, sliding sleeve 4
Centre bore be gradually reduced from top to bottom and lower end is equipped with the ball seat 4d of bell mouth shape, ball seat 4d is configured with and can be turned off
Steel pitching 7, the aditus laryngis of the lower end ball seat 4d and the centre bore of lower contact 3 connect；The lower end outer wall of sliding sleeve 4 is fixed by shear pin 5
On cylinder 2, the lower end of top connection 1 mutually chimeric with the inner wall of cylinder 2 after the lower part of top connection 1 is inserted in cylinder 2 and rotates
It is plugged by the upper end of spline and sliding sleeve 4.
When assembling, first sliding sleeve 4 is put into cylinder 2, then 2 inner cavity of cylinder is inserted into the lower end of top connection 1, then in rotation
Connector 1 keeps the lower part of top connection 1 mutually chimeric with the inner wall of cylinder 2, can both bear axial direction between such top connection 1 and cylinder 2
Pulling force, and torque can be transmitted；Then sliding sleeve 4 jacks up upwards, and the upper end of sliding sleeve 4 and the lower end of top connection 1 is made to pass through spline phase
Then sliding sleeve 4 is fixed on cylinder 2 by connection by shear pin 5, thus sliding sleeve 4 limits the rotation of top connection 1 and provides torsion
Square.When safety joint being needed to put aside, steel pitching 7 is put into tubing string, steel pitching 7 falls at ball seat 4d and sets, by central duct
Closing is generated and is built the pressure, and is built the pressure when reaching 10MPa, and shear pin 5 is cut, and sliding sleeve 4 glides to be detached from top connection 1, is rotated backward at this time
Top connection 1 is allowed to chimeric with cylinder 2 inner wall disengaging, and then top connection 1 can be drawn upwardly out, and realization is given up.Due to top connection 1 with
Not using threaded connection between cylinder 2, but mutually chimeric, mutual binding force very little is used, when giving up, not by tubing string and covered
The frictional resistance of tube wall and the influence of hole deviation, if investment steel pitching 7 and slightly rotate top connection 1 it is i.e. releasably engageable, disengage successfully
Rate is high, easy to operate, reliable performance.
The middle section of top connection 1 is equipped with top connection outer step 1a, and top connection outer step 1a is pressed in the upper port of cylinder 2, on
Connector outer step 1a position diameter below reduces paragraph by paragraph；The inner cavity of cylinder 2 is equipped with what multiple apertures reduced section by section from top to bottom
Cylinder stepped hole.The depth that top connection outer step 1a can be inserted into cylinder 2 to top connection 1 carries out axially position, top connection between outer land
It when rank 1a is pressed in the upper port of cylinder 2, can be rotated, be realized chimeric；Top connection 1 and cylinder 2 contract section by section from top to bottom
On the one hand diameter is convenient for turnery processing, the mutual cooperation being on the other hand also convenient between each section.
The periphery of top connection enlarged diameter section 1b below top connection outer step 1a is uniformly provided with three pieces of top connection convex block 1b1,
The central angle of each top connection convex block 1b1 is respectively 40 °, the inner wall of the first cylinder stepped hole 2a of 2 upper end of cylinder be symmetrically arranged with
The central angle on the upper end opening of top connection convex block 1b1 compatible L shape caulking groove 2a1, each L shape caulking groove 2a1 and top is 40 °, each L
The central angle of the lower part shape caulking groove 2a1 is 80 °, and the total height of each L shape caulking groove 2a1 is twice of top connection convex block 1b1 height, and each
Top connection convex block 1b1 is embedded in the root of corresponding L shape caulking groove 2a1 respectively.
Each top connection convex block 1b1 is inserted into from the opening of the upper end L shape caulking groove 2a1 respectively, and glide downwards are equivalent to top connection
The bottom that L shape caulking groove 2a1 is reached after the height of convex block 1b1, then rotates 40 °, so that top connection convex block 1b1 is completely embedded into L shape embedding
The root of slot 2a1.Since the total height of L shape caulking groove 2a1 is twice of top connection convex block 1b1, central angle is also top connection convex block
Twice of 1b1, top connection convex block 1b1 are embedded into after position, and top is overlapped with the roof of the lower part L shape caulking groove 2a1 completely, axial fixed
Position and radial positioning are very reliable, and the ability for transmitting pulling force and torque is very big.When giving up, top connection 1 is reversely rotated
40 °, disengaging can be realized in upper lifting pipe post.
The lower section of top connection enlarged diameter section 1b is equipped with top connection seal section 1c, and the circumference of top connection seal section 1c is equipped with extremely
The second cylinder platform is fitted in embedded with top connection sealing ring 1c2 in few twice top connection seal groove 1c1, top connection seal groove 1c1
The inner wall of rank hole 2b.Top connection sealing ring 1c2 can realize the reliable sealing between top connection 1 and cylinder 2, and process, install
Can be convenient, it not will receive the scratch of 2 inner wall of cylinder before the second cylinder stepped hole 2b of top connection sealing ring 1c2 insertion.
The lower end of top connection seal section 1c is connected with top connection reduced diameter section 1d, and top connection reduced diameter section 1d is plugged in third
The top of cylinder stepped hole 2c, and the periphery of top connection reduced diameter section 1d be symmetrically arranged with three be recessed inwardly and lower ending opening it is upper
Connector slot 1d1, top connection slot 1d1 are mutually staggered with the phase of top connection convex block 1b1 circumferentially；The top of sliding sleeve 4 is set
There are sliding sleeve enlarged diameter section 4b, sliding sleeve enlarged diameter section 4b to be located at middle part and the two clearance fit of third cylinder stepped hole 2c, sliding sleeve
The upper port periphery of enlarged diameter section 4b is symmetrically arranged with three sliding sleeve plug tenon 4a stretched out upwards, and each sliding sleeve plug tenon 4a correspondence is plugged on
In corresponding top connection slot 1d1；The central angle of each sliding sleeve plug tenon 4a is respectively 40 °, the central angle point of each top connection slot 1d1
It Wei not be 80 °.
Corresponding be plugged in top connection slot 1d1 of each sliding sleeve plug tenon 4a forms spline fitted, and the inner wall of sliding sleeve plug tenon 4a supports
On the bottom wall for leaning against top connection slot 1d1, guarantee the lower end coaxial line of 4 upper end of sliding sleeve and top connection 1, the side wall of sliding sleeve plug tenon 4a
Transmitting torque, top connection slot 1d1 and the phase of top connection convex block 1b1 circumferentially are contacted with the side wall of top connection slot 1d1
It mutually staggers easy to process.The central angle of top connection slot 1d1 is equal with the central angle of the lower part L shape caulking groove 2a1, sliding sleeve plug tenon 4a
Central angle it is equal with the central angle of top connection convex block 1b1 so that top connection convex block 1b1 insertion the root L shape caulking groove 2a1 it is same
When, the side wall of the side wall and top connection slot 1d1 of sliding sleeve plug tenon 4a fits, and synchronously arrives at the state of transmitting torque.
The excircle of sliding sleeve enlarged diameter section 4b be symmetrically arranged with three edges axially through sliding sleeve sliding slot 4b1, each sliding sleeve sliding slot
The central angle of 4b1 is respectively 40 ° and mutually staggers with sliding sleeve plug tenon 4a in circumferential phase；The top of third cylinder stepped hole 2c
Inner wall is symmetrically arranged with three inwardly projecting cylinder convex block 2c1, and the central angle of each cylinder convex block 2c1 is respectively 40 ° and correspondence is embedding
In corresponding sliding sleeve sliding slot 4b1.Before shear pin 5 is cut, cylinder convex block 2c1 makes sliding sleeve 4 and cylinder in sliding sleeve sliding slot 4b1
Radial positioning is realized between 2 and can transmit torque；Sliding sleeve sliding slot 4b1 and sliding sleeve plug tenon 4a is mutually staggered in circumferential phase can
Root to avoid sliding sleeve plug tenon 4a is weakened.After shear pin 5 is cut, the cooperation of cylinder convex block 2c1 and sliding sleeve sliding slot 4b1 so that
Sliding sleeve 4 slides axially downward.
Sliding sleeve reduced diameter section 4c is connected with below sliding sleeve enlarged diameter section 4b, the top of sliding sleeve reduced diameter section 4c is located at third
In cylinder stepped hole 2c, it is located in the 4th cylinder stepped hole 2d below the middle part of sliding sleeve reduced diameter section 4c, sliding sleeve reduced diameter section 4c
Middle part be equipped at least twice sliding sleeve seal groove 4c1, sliding sleeve sealing ring 4c2 is embedded in sliding sleeve seal groove 4c1 respectively, sliding sleeve is close
Seal 4c2 is fitted in the inner wall of the 4th cylinder stepped hole 2d.The top of sliding sleeve reduced diameter section 4c is located at third cylinder stepped hole 2c
In make the bottom of sliding sleeve enlarged diameter section 4b be higher by a distance than the step of third cylinder stepped hole 2c, when to give up, sliding sleeve
The downslide of enlarged diameter section 4b and the disengagement of sliding sleeve plug tenon 4a provide space.Sliding sleeve sealing ring 4c2 realizes sliding sleeve 4 and cylinder 2
The sealing of inner wall, and with 2 inner wall of the cylinder on top without scratch.
It is symmetrically arranged with to be screwed with respectively in two shear pin screw holes 2d1, two shear pin screw hole 2d1 in the lower circumference of cylinder 2 and cut
Nail 5, the inner termination of two shear pins 5 is plugged on respectively in the shear pin counterbore 4c3 of sliding sleeve 4, and shear pin counterbore 4c3 is in short transverse and ball seat
Throat site below 4d is contour.The wall thickness of throat site is most thick, intensity highest, is conducive to arrange shear pin counterbore 4c3；Shear pin 5
Inner termination is plugged in the shear pin counterbore 4c3 of sliding sleeve 4, and sliding sleeve 4 is fixed on cylinder 2；When the pressure that sliding sleeve 4 is born is enough
Greatly, shear pin 5 will be cut.
The sliding sleeve limit elongated slot 4c4 that twice extend vertically is symmetrically arranged in the lower circumference of sliding sleeve reduced diameter section 4c,
The axial height that sliding sleeve limits elongated slot 4c4 is greater than the height of sliding sleeve plug tenon 4a；Position-limitting pin is symmetrically screwed on the circumference of cylinder 2
6, position-limitting pin 6 and shear pin 5 are located on the same circumference and mutually stagger 90 °, and the inner termination of each position-limitting pin 6 is plugged on respectively
In corresponding sliding sleeve limit elongated slot 4c4.The inner termination of position-limitting pin 6 is symmetrically plugged in sliding sleeve limit elongated slot 4c4, so that sliding sleeve
4 can only will not rotate along straight line slide downward in sliding process；After maintenance, be screwed on shear pin 5 again on cylinder 2, cuts
The phase of shear pin counterbore 4c3, sliding sleeve plug tenon 4a and sliding sleeve sliding slot 4b1 that the inner termination of nail 5 is extremely easy to align with sliding sleeve 4 will not
It changes, eliminates the trouble of rotation centering.
The 4th cylinder stepped hole 2d inner wall above shear pin screw hole 2d1 is equipped with the cylinder relief groove 2d2 of internal diameter amplification, when
When in the top bar for being resisted against the 4th cylinder stepped hole 2d of getting out of a predicament or an embarrassing situation of sliding sleeve enlarged diameter section 4b, sliding sleeve sealing ring 4c2 is located at cylinder
In body relief groove 2d2, and the top of sliding sleeve plug tenon 4a is detached from top connection slot 1d1；It is set below 4th cylinder stepped hole 2d
There is the 5th cylinder stepped hole 2e.It after steel pitching 7 is put into tubing string, is set at ball seat 4d, central duct is built the pressure to giving up
Pressure cuts shear pin 5, and after sliding sleeve 4 glides, sliding sleeve plug tenon 4a and top connection slot 1d1 are detached from, and sliding sleeve sealing ring 4c2 is reached
At cylinder relief groove 2d2, it is relaxed the hydraulic of top, thus ground handling operator judges that the behaviour that gives up can be continued
Make, that is, rotate backward 40 ° of top connection, then upper lifting pipe post, realizes and be detached from.The lower section of 4th cylinder stepped hole 2d is equipped with internal diameter more
Centre bore of the 5th small cylinder stepped hole 2e as lower contact 3 can slide into the tubing string of lower section to avoid sliding sleeve 4.
The above is only the preferable possible embodiments of the utility model, patent protection that is non-therefore limiting to the utility model
Range.In addition to the implementation, the utility model can also have other embodiments.It is all to use equivalent substitution or equivalent transformation shape
At technical solution, all fall in the protection scope of the requires of the utility model.The utility model can without the technical characteristic of description
To pass through or realize that details are not described herein using the prior art.
Claims (10)
1. a kind of down-hole string hydraulic micro- rotation safety joint, including top connection and lower contact, the top connection and lower contact
It centre bore coaxial line and is mutually communicated, it is characterised in that: the upper end of the lower contact is equipped with the cylinder upwardly extended, the cylinder
Be equipped with can be along cylinder inboard wall sliding sleeve in axial sliding for inner cavity, the centre bore of the sliding sleeve is gradually reduced from top to bottom and lower end
Ball seat equipped with bell mouth shape, the ball seat are configured with the steel pitching that can be turned off, the aditus laryngis of the ball seat lower end and institute
The centre bore for stating lower contact connects；The lower end outer wall of the sliding sleeve is fixed on the cylinder by shear pin, the top connection
Lower part be inserted in the cylinder and rotate after it is mutually chimeric with the inner wall of cylinder, the lower end of the top connection passes through spline and institute
The upper end for stating sliding sleeve plugs.
2. the hydraulic micro- rotation safety joint of down-hole string according to claim 1, it is characterised in that: in the top connection
Section is equipped with top connection outer step, and the top connection outer step is pressed in the upper port of cylinder, and the top connection outer step is below
Position diameter reduces paragraph by paragraph；The inner cavity of the cylinder is equipped with the cylinder stepped hole that multiple apertures reduce section by section from top to bottom.
3. the hydraulic micro- rotation safety joint of down-hole string according to claim 2, it is characterised in that: the top connection between outer land
The periphery of top connection enlarged diameter section below rank is uniformly provided with three pieces of top connection convex blocks, and the central angle of each top connection convex block is respectively
40 °, the inner wall of the first cylinder stepped hole of the cylinder upper end is symmetrically arranged with L shape caulking groove compatible with top connection convex block, each L
The central angle on the upper end opening of shape caulking groove and top is 40 °, and the central angle of each L shape caulking groove lower part is 80 °, each L shape caulking groove it is total
Height is twice of top connection bump height, and each top connection convex block is embedded in the root of corresponding L shape caulking groove respectively.
4. the hydraulic micro- rotation safety joint of down-hole string according to claim 3, it is characterised in that: the top connection is straight greatly
The lower section of diameter section is equipped with top connection seal section, and the circumference of the top connection seal section is equipped at least twice top connection seal groove,
The inner wall of the second cylinder stepped hole is fitted in the top connection seal groove embedded with top connection sealing ring.
5. the hydraulic micro- rotation safety joint of down-hole string according to claim 4, it is characterised in that: the top connection sealing
The lower end of section is connected with top connection reduced diameter section, and the top connection reduced diameter section is plugged in the top of third cylinder stepped hole, and
The periphery of top connection reduced diameter section is symmetrically arranged with three and is recessed inwardly and the top connection slot of lower ending opening, the top connection slot
It is mutually staggered with the phase of the top connection convex block circumferentially；The top of the sliding sleeve is equipped with sliding sleeve enlarged diameter section, the cunning
Set enlarged diameter section is located at middle part and the two clearance fit of third cylinder stepped hole, the upper port periphery of the sliding sleeve enlarged diameter section
Three sliding sleeve plug tenons stretched out upwards are symmetrically arranged with, each sliding sleeve plug tenon correspondence is plugged in corresponding top connection slot；Each sliding sleeve
The central angle of plug tenon is respectively 40 °, and the central angle of each top connection slot is respectively 80 °.
6. the hydraulic micro- rotation safety joint of down-hole string according to claim 5, it is characterised in that: the sliding sleeve major diameter
Section excircle be symmetrically arranged with three edges axially through sliding sleeve sliding slot, the central angle of each sliding sleeve sliding slot be respectively 40 ° and with institute
Sliding sleeve plug tenon is stated to mutually stagger in circumferential phase；The upper inside wall of the third cylinder stepped hole is symmetrically arranged with three to convex
Cylinder convex block out, the central angle of each cylinder convex block are respectively 40 ° and correspond in corresponding sliding sleeve sliding slot.
7. the hydraulic micro- rotation safety joint of down-hole string according to claim 5, it is characterised in that: the sliding sleeve major diameter
The lower section of section is connected with sliding sleeve reduced diameter section, and the top of the sliding sleeve reduced diameter section is located in the third cylinder stepped hole, institute
It states the middle part of sliding sleeve reduced diameter section or less to be located in the 4th cylinder stepped hole, the middle part of the sliding sleeve reduced diameter section is equipped at least two
Road sliding sleeve seal groove, sliding sleeve sealing ring is embedded in the sliding sleeve seal groove respectively, and the sliding sleeve sealing ring is fitted in the 4th
The inner wall of body stepped hole.
8. the hydraulic micro- rotation safety joint of down-hole string according to claim 7, it is characterised in that: the lower part of the cylinder
It is symmetrically arranged with two shear pin screw holes on circumference, is screwed with the shear pin, the inner termination difference of two shear pins in two shear pin screw holes respectively
It is plugged in the shear pin counterbore of the sliding sleeve, throat site etc. of the shear pin counterbore below short transverse and the ball seat
It is high.
9. the hydraulic micro- rotation safety joint of down-hole string according to claim 8, it is characterised in that: the sliding sleeve minor diameter
The sliding sleeve limit elongated slot that twice extend vertically, the axial height of the sliding sleeve limit elongated slot are symmetrically arranged in the lower circumference of section
Degree is greater than the height of the sliding sleeve plug tenon；Position-limitting pin, the position-limitting pin and institute are symmetrically screwed on the circumference of the cylinder
It states shear pin to be located on the same circumference and mutually stagger 90 °, the inner termination of each position-limitting pin is plugged on corresponding sliding sleeve limit respectively
In bit length slot.
10. the hydraulic micro- rotation safety joint of down-hole string according to claim 8, it is characterised in that: the shear pin screw hole
4th cylinder stepped hole inner wall of top is equipped with the cylinder relief groove of internal diameter amplification, when getting out of a predicament or an embarrassing situation for the sliding sleeve enlarged diameter section
When being resisted against in the top bar of the 4th cylinder stepped hole, the sliding sleeve sealing ring is located in the cylinder relief groove, and
The top of the sliding sleeve plug tenon is detached from the top connection slot；The lower section of the 4th cylinder stepped hole is equipped with the 5th cylinder step
Hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680794.0U CN208870548U (en) | 2018-10-17 | 2018-10-17 | The hydraulic micro- rotation safety joint of down-hole string |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821680794.0U CN208870548U (en) | 2018-10-17 | 2018-10-17 | The hydraulic micro- rotation safety joint of down-hole string |
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| Publication Number | Publication Date |
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| CN208870548U true CN208870548U (en) | 2019-05-17 |
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ID=66470329
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138857A (en) * | 2018-10-17 | 2019-01-04 | 中国石油化工股份有限公司 | The hydraulic micro- rotation safety joint of down-hole string |
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2018
- 2018-10-17 CN CN201821680794.0U patent/CN208870548U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109138857A (en) * | 2018-10-17 | 2019-01-04 | 中国石油化工股份有限公司 | The hydraulic micro- rotation safety joint of down-hole string |
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