CN203742508U - Hydraulic safety releasing tool - Google Patents
Hydraulic safety releasing tool Download PDFInfo
- Publication number
- CN203742508U CN203742508U CN201420099707.8U CN201420099707U CN203742508U CN 203742508 U CN203742508 U CN 203742508U CN 201420099707 U CN201420099707 U CN 201420099707U CN 203742508 U CN203742508 U CN 203742508U
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- top connection
- releasing tool
- lower contact
- lock dog
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 241000282472 Canis lupus familiaris Species 0.000 claims description 34
- 239000012530 fluid Substances 0.000 claims description 15
- 230000003628 erosive effect Effects 0.000 claims description 7
- 230000003467 diminishing effect Effects 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
Abstract
The utility model relates to a hydraulic safety releasing tool in the field of the oilfield downhole operation tools. The hydraulic safety releasing tool comprises an upper connector, a lower connector and a sliding sleeve, all of which are hermetically connected to one another; an outer table stage which is narrowed radially is arranged at the outer periphery of the lower end of the upper connector, an inner table stage matched with the outer table stage is arranged at the inner periphery of the upper end of the lower connector, and the upper connector and the lower connector are fixed together by virtue of a plurality of locking blocks arranged on the table stages circumferentially; the sliding sleeve is arranged on the internal connection sections of the upper connector and the lower connector in slide fit and fixedly connected with the upper connector by use of a shear pin arranged radially; a ball casting seat is arranged at the upper end of the sliding sleeve; the outer ends of the locking blocks are propped against in first grooves formed in the inner table stage of the lower connector, oblique lead angles are formed between the upper side edges of the first grooves and the locking blocks in a matching manner, the inner ends of the locking blocks are propped against the outer periphery of the sliding sleeve, and second grooves corresponding to the locking blocks are formed in the sliding groove circumferentially at the lower sides of the locking blocks. The releasing tool is reliable in connection, good in sealing property and convenient to disengage, and further capable of effectively preventing accidental breakage and disengagement in use.
Description
Technical field
The utility model relates to tools for downhole of oil field field, particularly the safe releasing tool of a kind of fluid pressure type.
Background technology
In the time of underground work, sometimes in order to strengthen working string safety, safety joint can be installed on working string.Normally used safety mechanical joint has two kinds of back-buckling type and pull-types, the top connection of back-buckling type safety joint is directly connected by left hand thread with lower contact, in straight well and the little well of gradient, result of use is better, but for high angle hole and horizontal well, due to the frictional resistance of tubing string and casing wall, moment of torsion is transmitted very difficult, in going into the well process, tubing string meets card or operate miss, easily cause the safety joint generation of back-off phenomenon midway, security reliability is poor; And lifting safety joint only depends on shear pin to connect upper lower contact, in operation, be easily subject to the impact (as: well head, lowering velocity too fast) of operation and hole condition and cause breaking de-midway, cause work accident.Hydraulic safe releasing tool can transmit together moment of torsion and bear various combined stresseses with tubing string, in the time that down-hole string has an accident, can throw off from safety joint meeting card tubing string.Existing hydraulic safety connector, interior latus rectum is little, is unfavorable for the expansion of operation, and produces larger chock pressure difference, erosion ball seat, easily cause poorly sealed, the situation that sliding sleeve is not opened.
Utility model content
The problems referred to above that the utility model exists for hydraulic safe back-off sub of the prior art, provide a kind of syndeton reliable, good seal performance, and throw off conveniently, and the unexpected disconnected de-safe releasing tool of fluid pressure type in effectively preventing from using.
The purpose of this utility model is to realize like this, the safe releasing tool of a kind of fluid pressure type, comprise the top connection being tightly connected, lower contact and sliding sleeve, described top connection lower end periphery is provided with the outer step section radially diminishing, in described lower contact upper end, be provided with the interior step section coordinating with outer step section week, and some lock dogs that top connection and lower contact circumferentially arrange by step section are fixed, described sliding sleeve is slidably matched and is arranged at top connection and is fixedly connected with top connection with the linkage section of lower contact inside and by the shear pin radially arranging, sliding sleeve upper end is provided with pitching seat, described lock dog outer end leans in the groove one arranging in the interior step section of lower contact, between described groove one upper edge and lock dog, coordinate and be provided with tilt fittet, described lock dog the inner is resisted against the periphery of sliding sleeve, the sliding sleeve of described lock dog downside is circumferentially with the groove corresponding with lock dog two.
The safe releasing tool of fluid pressure type of the present utility model, upper lower contact is fixedly connected with by some lock dogs, be connected firmly, lock dog the inner is resisted against on sliding sleeve outer wall, and sliding sleeve is fixedly connected with top connection by shear pin, under normal operation, shear pin and sliding sleeve are not subject to other power except self gravitation, axial force and radial load that downhole tool transmits through upper lower contact all act on lock dog, are connected firmly, and can effectively prevent that downhole tool is disconnected de-midway.When downhole tool is met card midway need disconnect upper lower contact time, from well head pitching, suppress, cut off shear pin, sliding sleeve slides downwards, when sliding to groove two and lock dog at once, lock dog is under the guide effect of tilt fittet, radially slide in groove two, lock dog is skidded off in groove one, thereby top connection and lower contact are disconnected.Therefore the safe releasing tool of the fluid pressure type of this structure, reliable in structure, security performance is high, adapts to especially in the underground work of high angle hole and horizontal well, the instrument that can effectively prevent is disconnected de-midway in down-hole, and disconnect while meeting card convenient.
For ease of the differential pressure inside and outside balance sliding sleeve, anti-anti-skid sheath is surprisingly disconnected de-, and the sliding sleeve of described groove two correspondences is radially provided with equilibrium pressure hole.
For further improving the ability that downhole tool moment of torsion transmits, the end of described top connection and lower contact step section is respectively equipped with the axial emboss pit of mutual interlock.
For the sealing performance after further resistance to abrasion and the pitching that improves pitching seat, on the sealing sphere of described pitching seat, be coated with erosion resistant layer.
For further improving the performance that upper and lower joint sealing connects, the periphery of the sliding sleeve periphery of the upper and lower both sides of described shear pin and lock dog upside top connection step section is respectively equipped with some sealing rings.
Brief description of the drawings
Fig. 1 is the safe releasing tool structural representation of fluid pressure type of the present utility model.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the partial enlarged drawing at I place in Fig. 1.
Wherein, 1 top connection; 2 sealing rings; 3 sliding sleeves; 4 shear pins; 5 equilibrium pressure holes; 6 grooves two; 7 lock dogs; 8 grooves one; 9 lower contacts; 10 emboss pits; 11 erosion resistant layers.
Detailed description of the invention
As Fig. 1, shown in Fig. 2 and Fig. 3, for the safe releasing tool of fluid pressure type of the present utility model, comprise the top connection 1 being tightly connected, lower contact 9 and sliding sleeve 3, top connection 1 lower end periphery is provided with the outer step section radially diminishing, in lower contact 9 upper ends, be provided with the interior step section coordinating with outer step section week, and top connection 1 is fixing with some lock dogs 7 that lower contact 9 circumferentially arranges by step section, sliding sleeve 3 is slidably matched and is arranged at top connection 1 and is fixedly connected with top connection 1 with the linkage section of lower contact 9 inside and by the shear pin 4 radially arranging, sliding sleeve 3 upper ends are provided with pitching seat, lock dog 7 outer ends lean in the groove 1 arranging in the interior step section of lower contact 9, between groove one 8 upper edge and lock dog 7, coordinate and be provided with tilt fittet, lock dog 7 the inners are resisted against the periphery of sliding sleeve 3, the sliding sleeve 3 of lock dog 7 downsides is circumferentially with the groove corresponding with lock dog 726, the sliding sleeve 3 of groove 26 correspondences is radially provided with equilibrium pressure hole 5, the end of top connection 1 and lower contact 9 step sections is respectively equipped with the axial emboss pit 10 of mutual interlock, on the sealing sphere of pitching seat, be coated with erosion resistant layer 11, the periphery of sliding sleeve 3 peripheries of shear pin both sides Shang Xia 4 and the top connection 1 step section of lock dog 7 upsides is respectively equipped with some sealing rings 2.
The safe releasing tool of fluid pressure type of the present utility model, upper lower contact is fixedly connected with by some lock dogs 7, lock dog 7 the inners are resisted against on sliding sleeve 3 outer walls, sliding sleeve 3 is fixedly connected with top connection 1 by shear pin 4, under normal operation, shear pin 1 and sliding sleeve 3 are not subject to other power except self gravitation, and axial force and radial load that downhole tool transmits through upper lower contact all act on lock dog 7, be connected firmly, can effectively prevent that downhole tool is disconnected de-midway.And the emboss pit 10 of the mutual interlock of upper lower contact link can effectively improve the ability that downhole tool moment of torsion transmits; When downhole tool is met card midway need disconnect upper lower contact time, from well head pitching, suppress, cut off shear pin 4, sliding sleeve 3 glides, when sliding to groove 26 and lock dog 7 at once, lock dog 7 is under the guide effect of tilt fittet, radially slide in groove 26, lock dog 7 is skidded off in groove 1, thereby top connection 1 and lower contact 9 are disconnected.Therefore the safe releasing tool of the fluid pressure type of this structure, reliable in structure, security performance is high, in the special underground work that adapts to high angle hole and horizontal well, the instrument that can effectively prevent is disconnected de-midway in down-hole, it is convenient while meeting card, to disconnect, and the erosion resistant layer of pitching seat can stand the erosion of high pressure, high speed gravel for a long time, thereby ensures the sealing performance after pitching is suppressed.
The utility model is not limited to above-described embodiment; every on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in the scope of the utility model protection.
Claims (5)
1. the safe releasing tool of fluid pressure type, comprise the top connection being tightly connected, lower contact and sliding sleeve, it is characterized in that, described top connection lower end periphery is provided with the outer step section radially diminishing, in described lower contact upper end, be provided with the interior step section coordinating with outer step section week, and some lock dogs that top connection and lower contact circumferentially arrange by step section are fixed, described sliding sleeve is slidably matched and is arranged at top connection and is fixedly connected with top connection with the linkage section of lower contact inside and by the shear pin radially arranging, sliding sleeve upper end is provided with pitching seat, described lock dog outer end leans in the groove one arranging in the interior step section of lower contact, between described groove one upper edge and lock dog, coordinate and be provided with tilt fittet, described lock dog the inner is resisted against the periphery of sliding sleeve, the sliding sleeve of described lock dog downside is circumferentially with the groove corresponding with lock dog two.
2. the safe releasing tool of fluid pressure type according to claim 1, is characterized in that, the sliding sleeve of described groove two correspondences is radially provided with equilibrium pressure hole.
3. the safe releasing tool of fluid pressure type according to claim 1 and 2, is characterized in that, the end of described top connection and lower contact step section is respectively equipped with the axial emboss pit of mutual interlock.
4. the safe releasing tool of fluid pressure type according to claim 3, is characterized in that, on the sealing sphere of described pitching seat, is coated with erosion resistant layer.
5. the safe releasing tool of fluid pressure type according to claim 3, is characterized in that, the periphery of the top connection step section of the sliding sleeve periphery of the upper and lower both sides of described shear pin and lock dog upside is respectively equipped with some roads sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420099707.8U CN203742508U (en) | 2014-03-06 | 2014-03-06 | Hydraulic safety releasing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420099707.8U CN203742508U (en) | 2014-03-06 | 2014-03-06 | Hydraulic safety releasing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203742508U true CN203742508U (en) | 2014-07-30 |
Family
ID=51342325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420099707.8U Expired - Lifetime CN203742508U (en) | 2014-03-06 | 2014-03-06 | Hydraulic safety releasing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203742508U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422031A (en) * | 2015-12-18 | 2016-03-23 | 贵州高峰石油机械股份有限公司 | Method and device for improving hydraulic releasing working reliability |
| CN108222854A (en) * | 2016-12-21 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of stress joint |
-
2014
- 2014-03-06 CN CN201420099707.8U patent/CN203742508U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422031A (en) * | 2015-12-18 | 2016-03-23 | 贵州高峰石油机械股份有限公司 | Method and device for improving hydraulic releasing working reliability |
| CN108222854A (en) * | 2016-12-21 | 2018-06-29 | 中国石油天然气股份有限公司 | A kind of stress joint |
| CN108222854B (en) * | 2016-12-21 | 2019-06-11 | 中国石油天然气股份有限公司 | A kind of stress joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |
|
| CX01 | Expiry of patent term |