CN109138857A - 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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- CN109138857A CN109138857A CN201811207389.1A CN201811207389A CN109138857A CN 109138857 A CN109138857 A CN 109138857A CN 201811207389 A CN201811207389 A CN 201811207389A CN 109138857 A CN109138857 A CN 109138857A
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- sliding sleeve
- top connection
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 27
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000006872 improvement Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 241000565675 Oncomelania Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B17/06—Releasing-joints, e.g. safety joints
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The present invention 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 present invention 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 spiral shell
Bar drill has 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.
Summary of the invention
It is an object of the present invention to overcome problems of the prior art, provide a kind of down-hole string 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, a kind of down-hole string of the invention hydraulic micro- rotation safety joint, including top connection
And lower contact, it the centre bore coaxial line of the top connection and lower contact and is mutually communicated, the upper end of the lower contact is equipped with upward
The cylinder of extension, the inner cavity of the cylinder be equipped with can along cylinder inboard wall sliding sleeve in axial sliding, the centre bore of the sliding sleeve from
It is gradually reduced under above and ball seat of the lower end equipped with bell mouth shape, the ball seat is configured with the steel pitching that can be turned off, institute
The centre bore of the aditus laryngis and the lower contact of stating ball seat lower end connects；The lower end outer wall of the sliding sleeve is fixed on institute by shear pin
State on cylinder, the lower part of the top connection is mutually chimeric with the inner wall of cylinder after being inserted in the cylinder and rotating, it is described on connect
The lower end of head is plugged by the upper end of spline and the sliding sleeve.
Compared with the existing technology, the present invention achieve it is following the utility model has the advantages that assembling when, first sliding sleeve is put into cylinder, then
Cylinder lumen is inserted into the lower end of top connection, then rotating top connection keeps the lower part of top connection mutually chimeric with the inner wall of cylinder, this
Not only axial tension can be born between sample top connection and cylinder, but also can transmit torque；Then sliding sleeve jacks up upwards, makes sliding sleeve
Upper end is connected with the lower end of top connection by spline, and then sliding sleeve is fixed on cylinder by shear pin, and thus sliding sleeve limits
The rotation of top connection simultaneously provides torque.When safety joint being needed to put aside, steel pitching is put into tubing string, steel pitching falls in ball seat
Place is set, and central duct closing is generated and is built the pressure, is built the pressure when reaching 10MPa, and shear pin is cut, and sliding sleeve slides downwards and top connection are de-
From rotating backward top connection at this time and be allowed to chimeric with cylinder inboard wall disengaging, then top connection can be drawn upwardly out, and realization is given up.
It is threadedly coupled due to not used between top connection and cylinder, but uses mutually chimeric, mutual binding force very little, when giving up,
It is not influenced by the frictional resistance and hole deviation of tubing string and casing wall, as long as putting into steel pitching and rotating top connection slightly can take off
Button disengages success rate height, easy to operate, reliable performance.
As an improvement of the present invention, the middle section of the top connection is equipped with top connection outer step, the top connection outer step pressure
In the upper port of cylinder, the top connection outer step position diameter below reduces paragraph by paragraph；The inner cavity of the cylinder from upper and
Have the cylinder stepped hole that multiple apertures reduce section by section.The depth that top connection outer step can be inserted into cylinder to top connection carries out
Axially position when top connection outer step is pressed in the upper port of cylinder, can be rotated, and be realized chimeric；Top connection and cylinder
Section by section on the one hand undergauge is convenient for turnery processing from top to bottom, the mutual cooperation being on the other hand also convenient between each section.
As a further improvement of the present invention, the periphery of the top connection enlarged diameter section below the top connection outer step is uniform
Equipped with three pieces of top connection convex blocks, the central angle of each top connection convex block is respectively 40 °, the first cylinder stepped hole of the cylinder upper end
Inner wall be symmetrically arranged with L shape caulking groove compatible with top connection convex block, the upper end opening of each L shape caulking groove and central angle on top is
40 °, 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 it is each on
Connector convex block is embedded in the root of corresponding L shape caulking groove respectively.Each top connection convex block is inserted into from the opening of L shape caulking groove upper end respectively,
Glide downwards are equivalent to the bottom of arrival L shape caulking groove after the height of top connection convex block, then rotate 40 °, keep top connection convex block complete
The root of full insertion L shape caulking groove.Since the total height of L shape caulking groove is twice of top connection convex block, central angle is also that top connection is convex
Twice of block, top connection convex block are embedded into after position, and top is overlapped with the roof of L shape caulking groove lower part completely, axially position and diameter
It is very reliable to positioning, and the ability for transmitting pulling force and torque is very big.When giving up, top connection reversely rotates 40 °, upper lifting pipe
Disengaging can be realized in column.
As a further improvement of the present invention, the lower section of the top connection enlarged diameter section is equipped with top connection seal section, described
The circumference of top connection seal section is equipped at least twice top connection seal groove, and it is close to be embedded with top connection in the top connection seal groove
Seal is fitted in the inner wall of the second cylinder stepped hole.Top connection sealing ring can realize the reliable sealing between top connection and cylinder,
And processing, installation can be convenient, not will receive the scratch of cylinder inboard wall before top connection sealing ring the second cylinder stepped hole of insertion.
As a further improvement of the present invention, the lower end of the top connection seal section is connected with top connection reduced diameter section, institute
The top that top connection reduced diameter section is plugged in third cylinder stepped hole is stated, and the periphery of top connection reduced diameter section is symmetrically arranged with three
It is recessed inwardly and the top connection slot of lower ending opening, phase phase of the top connection slot with the top connection convex block circumferentially
Mutually it is staggered；The top of the sliding sleeve is equipped with sliding sleeve enlarged diameter section, and the sliding sleeve enlarged diameter section is located in third cylinder stepped hole
Portion and the two clearance fit, the upper port periphery of the sliding sleeve enlarged diameter section are symmetrically arranged with three sliding sleeve plug tenons stretched out upwards,
Each sliding sleeve plug tenon correspondence is plugged in corresponding top connection slot；The central angle of each sliding sleeve plug tenon is respectively 40 °, and each top connection is inserted
The central angle of slot is respectively 80 °.Corresponding be plugged in top connection slot of each sliding sleeve plug tenon forms spline fitted, sliding sleeve plug tenon it is interior
Wall is resisted against on the bottom wall of top connection slot, guarantee sliding sleeve upper end and top connection lower end coaxial line, the side wall of sliding sleeve plug tenon with
The side wall contact transmitting torque of top connection slot, top connection slot is mutually staggered with the phase of top connection convex block circumferentially to be convenient for
Processing.The central angle of top connection slot is equal with the central angle of L shape caulking groove lower part, the central angle and top connection convex block of sliding sleeve plug tenon
Central angle it 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 slot
Side wall fits, and synchronously arrives at the state of transmitting torque.
As a further improvement of the present invention, the excircle of the sliding sleeve enlarged diameter section be symmetrically arranged with three edges axially through
Sliding sleeve sliding slot, the central angle of each sliding sleeve sliding slot is respectively 40 ° and mutually staggers with the sliding sleeve plug tenon in circumferential phase；Institute
The upper inside wall for stating third cylinder stepped hole is symmetrically arranged with three inwardly projecting cylinder convex blocks, the central angle point of each cylinder convex block
It Wei not be 40 ° and corresponding in corresponding sliding sleeve sliding slot.Before shear pin is cut, cylinder convex block make in the sliding sleeve sliding slot sliding sleeve with
Radial positioning is realized between cylinder and can transmit torque；Sliding sleeve sliding slot and sliding sleeve plug tenon are mutually staggered in circumferential phase can be with
Avoid the root of sliding sleeve plug tenon weakened.After shear pin is cut, the cooperation of cylinder convex block and sliding sleeve sliding slot is so that sliding sleeve edge is axial
It slides downwards.
As a further improvement of the present invention, it is connected with sliding sleeve reduced diameter section below the sliding sleeve enlarged diameter section, it is described
The top of sliding sleeve reduced diameter section is located in the third cylinder stepped hole, is located at the 4th below the middle part of the sliding sleeve reduced diameter section
In cylinder stepped hole, the middle part of the sliding sleeve reduced diameter section is equipped at least twice sliding sleeve seal groove, divides in the sliding sleeve seal groove
Not Qian Zhuanyou sliding sleeve sealing ring, the sliding sleeve sealing ring is fitted in the inner wall of the 4th cylinder stepped hole.Sliding sleeve reduced diameter section it is upper
Portion be located in third cylinder stepped hole make the bottom of sliding sleeve enlarged diameter section than the step of third cylinder stepped hole be higher by one section away from
From 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 sliding sleeve
With the sealing of cylinder inboard wall, and with the cylinder inboard wall on top without scratch.
As a further improvement of the present invention, two shear pin screw holes are symmetrically arranged in the lower circumference of the cylinder, two cut
The shear pin is screwed in oncomelania hole respectively, the inner termination of two shear pins is plugged on respectively in the shear pin counterbore of the sliding sleeve, described
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 highest has
Conducive to arrangement 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 sliding sleeve is held
The pressure received is sufficiently large, and shear pin will be cut.
As a further improvement of the present invention, twice are symmetrically arranged in the lower circumference of the sliding sleeve reduced diameter section along axial
The sliding sleeve of upper extension 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；The cylinder
Position-limitting pin is symmetrically screwed on the circumference of body, the position-limitting pin is located on the same circumference and mutually staggers with the shear pin
90 °, the inner termination of each position-limitting pin is plugged on respectively in corresponding sliding sleeve limit elongated slot.The symmetrical grafting of the inner termination of position-limitting pin
In sliding sleeve limit elongated slot, so that sliding sleeve can only will not rotate along straight line slide downward in sliding process；After maintenance,
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, and sliding sleeve plug tenon and sliding sleeve are sliding
The phase of slot will not change, and eliminate the trouble of rotation centering.
As a further improvement of the present invention, the 4th cylinder stepped hole inner wall above the shear pin screw hole is put equipped with internal diameter
Big cylinder relief groove, when getting out of a predicament or an embarrassing situation for the sliding sleeve enlarged diameter section is resisted against in the top bar of the 4th cylinder stepped hole
When, 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 and inserts
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, sat at ball seat
Envelope, 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 detached from, sliding
Cover sealing ring to reach at cylinder relief groove, be relaxed the hydraulic of top, ground handling operator thus judge can to continue into
Capable operation of giving up, that is, rotate backward 40 ° of top connection, then upper lifting pipe post, realizes and is detached from.The lower section of 4th cylinder stepped hole is equipped with
Centre bore of 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
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to
Illustrate to use, it is non-to limit the present invention.
Fig. 1 is main view of the down-hole string of the present invention 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, down-hole string of the invention includes top connection 1 and lower contact with hydraulic micro- rotation safety joint
3, the upper lumen of top connection 1 is equipped with the taper box thread 1e being mutually screwed on top tubing string, and the outer end of lower contact 3 is equipped with and lower section
The taper male thread 3a that tubing string is mutually screwed on.The centre bore coaxial line of top connection 1 and lower contact 3 and be mutually communicated, lower contact 3 it is upper
End is equipped with the cylinder 2 that upwardly extends, and 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
Heart hole is gradually reduced from top to bottom and lower end is equipped with the ball seat 4d of bell mouth shape, and ball seat 4d is configured with the steel that can be turned off and throws
Ball 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 on cylinder by shear pin 5
On body 2, the lower part of top connection 1 is mutually chimeric with the inner wall of cylinder 2 after being inserted in cylinder 2 and rotating, and the lower end of top connection 1 passes through
The upper end of spline and sliding sleeve 4 plugs.
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 present invention, non-therefore limitation scope of patent protection of the invention.It removes
Outside above-described embodiment, the present invention can also have other embodiments.All technical sides formed using equivalent substitution or equivalent transformation
Case is all fallen within the protection domain of application claims.Technical characteristic of the present invention without description can by or use existing skill
Art realizes that details are not described herein.
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 |
|---|---|---|---|
| CN201811207389.1A CN109138857A (en) | 2018-10-17 | 2018-10-17 | The hydraulic micro- rotation safety joint of down-hole string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811207389.1A CN109138857A (en) | 2018-10-17 | 2018-10-17 | The hydraulic micro- rotation safety joint of down-hole string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109138857A true CN109138857A (en) | 2019-01-04 |
Family
ID=64812228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811207389.1A Pending CN109138857A (en) | 2018-10-17 | 2018-10-17 | The hydraulic micro- rotation safety joint of down-hole string |
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| Country | Link |
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| CN (1) | CN109138857A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109854213A (en) * | 2019-03-18 | 2019-06-07 | 中国石油化工股份有限公司 | Set damage repairs the sand control pipe of well |
| CN109869120A (en) * | 2019-03-18 | 2019-06-11 | 中国石油化工股份有限公司 | The sand control back-up sand system of large cased well |
| CN114985224A (en) * | 2022-07-08 | 2022-09-02 | 沈阳芯源微电子设备股份有限公司 | Waste discharge mechanism and photoresist coating platform |
| CN115788326A (en) * | 2023-02-07 | 2023-03-14 | 山东华冠能源技术有限公司 | Hydraulic micro-rotation safety joint for downhole pipe column |
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| CN115788326A (en) * | 2023-02-07 | 2023-03-14 | 山东华冠能源技术有限公司 | Hydraulic micro-rotation safety joint for downhole pipe column |
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