CN204457529U - Releasing tool - Google Patents
Releasing tool Download PDFInfo
- Publication number
- CN204457529U CN204457529U CN201420806556.5U CN201420806556U CN204457529U CN 204457529 U CN204457529 U CN 204457529U CN 201420806556 U CN201420806556 U CN 201420806556U CN 204457529 U CN204457529 U CN 204457529U
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- China
- Prior art keywords
- top connection
- central tube
- accessory
- giving
- square cylinder
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- Withdrawn - After Issue
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Abstract
The utility model provides a kind of releasing tool, and for accessory indwelling of giving up in precalculated position, releasing tool comprises: top connection; Pass square cylinder, one end is connected with top connection, and the other end connects with accessory of giving up and is connected; Central tube, being connected with top connection and being arranged in passes in square cylinder; Lower contact, is connected with central tube; Pars contractilis, the outer peripheral face being arranged at central tube is movably being given up between accessory and central tube, and one end and the lower contact of pars contractilis abut against; Elastic claw, one end is connected with the other end of pars contractilis; Fluid power shear pin, is connected between central tube and elastic claw; When fluid power shear pin be in not by cut off original state time, the other end of elastic claw is connected with accessory of giving up and abuts against with lower contact; When fluid power shear pin is cut off, pars contractilis extends, and the other end and the accessory of giving up of elastic claw are separated and away from lower contact, accessory of giving up is given up.Simple and the handling safety of releasing tool structure of the present utility model.
Description
Technical field
The utility model relates to oilfield well completion apparatus field, in particular to a kind of releasing tool.
Background technology
Releasing tool in existing case, what hydraulic releasing part adopted is the mode of " shear pin "+" suppressing ".On the one hand shear pin easily enters in the process of well well-flushing repeatedly tired at tubing string, and the pressure that causes giving up is forbidden, or gives up in advance; On the other hand under " upper button " effect of easily producing at tube post of shear pin because the relative motion between part is stressed and tired, the pressure that causes giving up is forbidden, or gives up in advance.
On the other hand, the releasing tool in existing case, machinery is given up, and function is a part of adopts " left-hand thread " mode, and a part adopts " directly pressing down " mode." left-hand thread " mode at lower fashionable rotating forward tubing string, can not enter difficulty under this considerably increases tubing string, extends the angle of incidence under tubing string; Be easy to after the mode that " directly presses down " enters horizontal segment under tubing string conflict with " being hampered ", make ground judge downhole conditions difficulty, operation easier is large, easily causes and gives up in advance, which has limited the use of this kind of instrument in horizontal well.
Utility model content
The utility model aims to provide that a kind of structure is simple, the releasing tool of handling safety.
To achieve these goals, the utility model provides a kind of releasing tool, and for accessory indwelling of giving up in precalculated position, releasing tool comprises: top connection; Pass square cylinder, one end is connected with top connection, and the other end connects with accessory of giving up and is connected; Central tube, being connected with top connection and being arranged in passes in square cylinder; Lower contact, is connected with central tube; Pars contractilis, the outer peripheral face being arranged at central tube is movably being given up between accessory and central tube, and one end and the lower contact of pars contractilis abut against; Elastic claw, one end is connected with the other end of pars contractilis; Fluid power shear pin, is connected between central tube and elastic claw; When fluid power shear pin be in not by cut off original state time, the other end of elastic claw is connected with accessory of giving up and abuts against with lower contact; When fluid power shear pin is cut off, pars contractilis extends, and the other end and the accessory of giving up of elastic claw are separated and away from lower contact, accessory of giving up is given up.
Further, releasing tool also comprises: mechanical shear pin, connects and passes square cylinder, central tube and top connection, and the one end passing square cylinder is connected rotationally with top connection; Wherein, when top connection rotates clockwise relative to biography square cylinder, mechanical shear pin is in not by the original state of cutting off; When top connection rotates counterclockwise relative to biography square cylinder, mechanical shear pin is cut off, and top connection promotion central tube moves to fluid power shear pin and cut off, and the other end and the accessory of giving up of elastic claw are separated and away from lower contact, accessory of giving up is given up.
Further, top connection has spaced groove, and the one end passing square cylinder has the projecting connecting portion suitable with groove, and when top connection rotates clockwise relative to biography square cylinder, the top of connecting portion and top connection abut against near the bottom passing square cylinder; When top connection rotates counterclockwise relative to biography square cylinder, connecting portion stretches in groove.
Further, releasing tool also comprises: carriage, centrally pipe axial direction be slidably disposed in central tube outer peripheral face on and be arranged in the gathering sill passing square cylinder; Elastomeric element, telescopically is arranged between the bottom of top connection and carriage; Accessory of giving up has groove towards one end of top connection, the opening of groove is towards top connection, groove is positioned at the outside of gathering sill and correspondingly with gathering sill arranges, when top connection rotates counterclockwise relative to biography square cylinder, top connection elasticity of compression parts with carriage is moved to give up accessory towards in the groove in top connection direction.
Further, carriage comprises: spacing ring, be set in slidably central tube periphery and between central tube limited step on elastomeric element and central tube periphery; Moment of torsion block, is connected to the external surface of spacing ring highlightedly, and when top connection rotates counterclockwise relative to biography square cylinder, top connection elasticity of compression parts move in groove to make moment of torsion block.
Further, pars contractilis comprises: piston rod, and one end of piston rod is connected with central tube; Piston, one end is connected with the other end of piston rod, and the other end and lower contact abut against.
Further, releasing tool also comprises linkage, and linkage comprises: tube connector, and the outer peripheral face being sheathed on central tube towards the direction of top connection is slidably connected with one end of elastic claw, and tube connector is between carriage and lower contact.
Further, linkage also comprises: lock ring, on the outer peripheral face being fixedly connected on central tube and between tube connector and central tube, lock ring has the lobe tilted towards top connection direction, and the inner surface of tube connector has the teeth groove suitable with lobe.
Further, linkage also comprises snap ring, is set on the outer peripheral face of tube connector.
Application the technical solution of the utility model, due to be in when fluid power shear pin not by cut off original state time, the other end of elastic claw is connected with accessory of giving up and abuts against with lower contact; When fluid power shear pin is cut off, pars contractilis extends, and the other end and the accessory of giving up of elastic claw are separated and away from lower contact, accessory of giving up is given up.So the simple and handling safety of releasing tool structure of the present utility model.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows the structural representation of releasing tool of the present utility model.
Reference numeral in figure:
10, to give up accessory;
11, groove;
20a, top connection; 20b, lower contact;
21, lower contact step;
30, square cylinder is passed;
31, gathering sill;
40, central tube;
41, central tube limited step;
50, linkage;
51, tube connector;
52, lock ring; 53, snap ring; 54, pipe limited step;
60, pars contractilis;
61, piston rod; 62, piston;
70, elastic claw;
80a, fluid power shear pin; 80b, mechanical shear pin;
90a, carriage; 90b, elastomeric element; 91, spacing ring; 92, moment of torsion block.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
It is noted that following detailed description is all exemplary, be intended to provide further instruction to the application.Unless otherwise, all technology used herein and scientific terminology have the identical meanings usually understood with the application person of an ordinary skill in the technical field.
It should be noted that used term is only to describe detailed description of the invention here, and be not intended to the illustrative embodiments of restricted root according to the application.
As used herein, unless the context clearly indicates otherwise, otherwise singulative is also intended to comprise plural form, in addition, it is to be further understood that, " comprise " when using term in this manual and/or " comprising " time, it indicates existing characteristics, step, operation, device, assembly and/or their combination.As shown in Figure 1, the utility model provides a kind of releasing tool.
Particularly, releasing tool is used for giving up accessory 10 indwelling in precalculated position.Releasing tool comprises top connection 20a, passes square cylinder 30, central tube 40, lower contact 20b, pars contractilis 60, elastic claw 70 and fluid power shear pin 80a.
The one end passing square cylinder 30 is connected with top connection 20a, and the other end connects with accessory 10 of giving up and is connected.Central tube 40 is connected with top connection 20a and is arranged in and passes in square cylinder 30, and lower contact 20b is connected with central tube 40.The outer peripheral face that pars contractilis 60 is arranged at central tube 40 is movably being given up between accessory 10 and central tube 40, and one end and the lower contact 20b of pars contractilis 60 abut against.One end of elastic claw 70 is connected with the other end of pars contractilis 60, and fluid power shear pin 80a is connected between central tube 40 and elastic claw 70.
When fluid power shear pin 80a be in not by cut off original state time, the other end of elastic claw 70 is connected with accessory 10 of giving up and abuts against with lower contact 20b.When fluid power shear pin 80a is cut off, pars contractilis 60 extends, and the other end and the accessory 10 of giving up of elastic claw 70 are separated and away from lower contact 20b, accessory 10 of giving up is given up.
Due to be in as fluid power shear pin 80a not by cut off original state time, the other end of elastic claw 70 is connected with accessory 10 of giving up and abuts against with lower contact 20b.When fluid power shear pin 80a is cut off, pars contractilis extends, and the other end and the accessory 10 of giving up of elastic claw 70 are separated and away from lower contact 20b, accessory 10 of giving up is given up.So the simple and handling safety of releasing tool structure of the present utility model.
Preferably, releasing tool also comprises mechanical shear pin 80b.Machinery shear pin 80b connects biography square cylinder 30, central tube 40 and top connection 20a, and the one end passing square cylinder 30 is connected rotationally with top connection 20a.
Wherein, when top connection 20a rotates clockwise relative to biography square cylinder 30, mechanical shear pin 80b is in not by the original state of cutting off.When top connection 20a rotates counterclockwise relative to biography square cylinder 30, machinery shear pin 80b is cut off, top connection 20a promotion central tube 40 moves to fluid power shear pin 80a and is cut off, and the other end and the accessory 10 of giving up of elastic claw 70 are separated and away from lower contact 20b, accessory 10 of giving up is given up.
Top connection 20a has spaced groove, and the one end passing square cylinder 30 has the projecting connecting portion suitable with groove, is jointly formed " ear formula structure " with groove.When top connection 20a rotates clockwise relative to biography square cylinder 30, the top of connecting portion and top connection 20a abut against near the bottom passing square cylinder 30.When top connection 20a rotates counterclockwise relative to biography square cylinder 30, connecting portion stretches in groove, and " ear formula structure " is separated.
Preferably, releasing tool also comprises carriage 90a, carriage 90a centrally pipe 40 axial direction be slidably disposed in central tube 40 outer peripheral face on and be arranged in the gathering sill 31 passing square cylinder 30.Elastomeric element 90b telescopically is arranged between the bottom of top connection 20a and carriage 90a, accessory 10 of giving up has groove 11 towards one end of top connection 20a, the opening of groove 11 is towards top connection 20a, and groove 11 is positioned at the outside of gathering sill 31 and correspondingly with gathering sill 31 arranges.
When top connection 20a rotates counterclockwise relative to biography square cylinder 30, top connection 20a elasticity of compression parts 90b with carriage 90a is moved to give up accessory 10 towards in the groove 11 in top connection 20a direction.
Carriage 90a comprises spacing ring 91 and moment of torsion block 92.Spacing ring 91 is set in the periphery of central tube 40 slidably and between central tube limited step 41 on elastomeric element 90b and central tube 40 periphery, moment of torsion block 92 is connected to the external surface of spacing ring 91 highlightedly.
When top connection 20a rotates counterclockwise relative to biography square cylinder 30, top connection 20a elasticity of compression parts 90b moves in groove 11 to make moment of torsion block 92.
Pars contractilis 60 comprises piston rod 61 and piston 62.One end of piston rod 61 is connected with central tube 40, and one end of piston 62 is connected with the other end of piston rod 61, and the other end and the lower contact 20b of piston 62 abut against.
Preferably, releasing tool also comprises linkage 50, and linkage 50 comprises tube connector 51.The outer peripheral face that tube connector 51 can be sheathed on central tube 40 slidably towards the direction of top connection 20a is connected with one end of elastic claw 70, and tube connector 51 is between carriage 90a and lower contact 20b.
Linkage 50 also comprises lock ring 52, on the outer peripheral face that lock ring 52 is fixedly connected on central tube 40 and between tube connector 51 and central tube 40, lock ring 52 has the lobe tilted towards top connection 20a direction, and the inner surface of tube connector 51 has the teeth groove suitable with lobe.
Preferably, linkage 50 also comprises snap ring 53, is set on the outer peripheral face of tube connector 51.
The preferred embodiment that the utility model provides is as follows:
As shown in Figure 1, top connection 20a and biography square cylinder 30 are by ear formula Standard relation.Top connection 20a and central tube 40 are connected by high strength screw thread.The moment of torsion block 92 of carriage 90a and spacing ring 91 are removably connected by screw.Its entirety of whole carriage can be slided on central tube 40, and spacing by the central tube limited step 41 on elastomeric element 90b and central tube 40.Central tube 40 is connected by high strength screw thread with lower contact 20b.Central tube 40, tube connector 51 are connected by lock ring 52.Snap ring 53 is split rings, by elastic card on tube connector 51.Tube connector 51 and elastic claw 70 there is no screwed connection by tube connector limited step 54 is spacing.Central tube 40 and piston rod 61 be can relative motion there is no screwed connection.Piston 62 and central tube 40 are also can relative motion also without screw thread connection.Accessory 10 top of giving up has groove 11, so that moment of torsion block 92 inserts transmitting torque, the inside of accessory 10 of giving up has groove, to coordinate with elastic claw 70.
Specific operation process is as follows:
Enter under tubing string (straight well section):
Under straight well, enter the stage, tail pipe weight acts in the projection of the end of elastic claw 70 by accessory 10 of giving up, and lower contact step 21 close contact on the projection of the end on elastic claw 70 and lower contact 20b, acts on tubing string weight on central tube 40.Elastic claw 70 and lower contact 20b are only by shearing force and extruding force.Elastic claw 70, lower contact 20b and accessory 10 three close contact of giving up, whole tail pipe weight is pulling down accessory 10 of giving up, this weight acts on elastic claw 70 by internal groove by accessory 10 of giving up, elastic claw 70 and lower contact 20b close contact, without space between two, therefore elastic claw 70 there is no fear of being pulled by the groove from accessory 10 of giving up, and ensure that tubing string safety.Now, can rotate tubing string, moment of torsion, by top connection 20a and " ear " formula structure passed on square cylinder 30, drives whole tubing string to rotate via moment of torsion block 92 and accessory 10 of giving up accordingly, and elastic claw 70 and lower contact 20b be not by moment of torsion.Now the following figure of state of top connection 20a and biography square cylinder 30, is still reset condition, the i.e. appearance of ground-mounted.
Enter under tubing string (inclined shaft, horizontal well Open-Hole Section):
Due to the effect of Open-Hole Section frictional force, tail pipe weight diminishes gradually or disappears, elastic claw 70 and accessory 10 no longer close contact of giving up.Under the tubing string weight effect of top, elastic claw 70 can be separated certain distance with lower contact 20b, and elastic claw 70 under the effect of the pressure, is separated by a distance with lower contact 20b); The weight of top tubing string passes square cylinder via part 1 top connection, part 2 and acts on and give up on accessory 10, promotes whole tubing string descending.Now still can rotate tubing string, top connection 20a and the state passing square cylinder 30 are still reset condition, can transmitting torque, under accelerating, enter process.Moment of torsion, by top connection 20a and " ear " formula structure passing square cylinder 30, drives whole tubing string to rotate via moment of torsion block 92 and accessory 10 of giving up accordingly, and elastic claw 70 and lower contact 20b be not by torque influence.As needed well-flushing, circulation, can on carry certain tonnage, elastic claw 70 is contacted again with lower contact 20b, and like this due to the position-limiting action of lower contact 20b, no matter pressure height, elastic claw 70 all can not be given up in advance.
Fluid power is given up:
When giving up, certain tubing string weight need be pressed down, elastic claw 70 is made to be separated certain distance with lower contact 20b lower contact, suppress to certain value, the hole entering tool of liquid on central tube 40, promote piston rod 61 to move upward, because piston 62 has been blocked by lower contact 20b, inactive, so movable part can only move upward, fluid power shear pin 80a is cut off, fluid power meeting pushing connecting pipe 51 also drives lock ring 52 to move upward, due to the one-way movement characteristic of lock ring 52, corresponding sports part can only move upward, and can not move downward.After moving to certain distance, elastic claw 70 just can be regained from accessory 10 of giving up, and complete and give up, accessory 10 of giving up stays in down-hole.If do not press down constant weight, elastic claw 70 and lower contact 20b, due to position-limiting action, can not be separated from each other under pressure, namely can not mistake give up.
Machinery is given up:
As needed machinery to give up, after afterbody instrument sets, can reverse certain moment of torsion, cutting off mechanical shear pin 80b, " ear " formula structure is separated, and length groove enters mutually, and namely connecting portion stretches in groove.Press down constant weight, top connection 20a, central tube 40 can move down, and just no longer continue to move downward afterwards because snap ring 53 elastic claw 70 stops, central tube 40 just can be cut off fluid power shear pin 80a and continue to move downward.Lock ring 52 just can move upward certain distance under relative motion effect, upper lifting pipe post afterwards, central tube 40 just can drivening piece lock ring 52, tube connector 51 move upward together with elastic claw 70, and elastic claw 70 proposes from accessory 10 of giving up, complete machinery to give up, accessory 10 of giving up stays in down-hole.
As can be seen from the above description, the utility model the above embodiments achieve following technique effect:
When fluid power shear pin be in not by cut off original state time, the other end of elastic claw is connected with accessory of giving up and abuts against with lower contact; When fluid power shear pin is cut off, pars contractilis extends, and the other end and the accessory of giving up of elastic claw are separated and away from lower contact, accessory of giving up is given up.So the simple and handling safety of releasing tool structure of the present utility model.
It should be noted that, term " first ", " second " etc. in the manual of the application and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as the embodiment example of the application described herein if with except here diagram or describe those except order implement.
In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
For convenience of description, here can usage space relative terms, as " ... on ", " in ... top ", " at ... upper surface ", " above " etc., be used for the spatial relation described as a device shown in the figure or feature and other devices or feature.
Should be understood that, space relative terms is intended to comprise the different azimuth in use or operation except the described in the drawings orientation of device.Such as, " in other devices or structure below " or " under other devices or structure " will be positioned as after if the device in accompanying drawing is squeezed, being then described as the device of " above other devices or structure " or " on other devices or structure ".
Thus, exemplary term " in ... top " can comprise " in ... top " and " in ... below " two kinds of orientation.This device also can other different modes location (90-degree rotation or be in other orientation), and relatively describe space used here and make respective explanations.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (9)
1. a releasing tool, for giving up, accessory (10) indwelling, in precalculated position, is characterized in that, described releasing tool comprises:
Top connection (20a);
Pass square cylinder (30), one end is connected with described top connection (20a), and the other end was connected with described accessory of giving up (10) company;
Central tube (40), is connected with described top connection (20a) and is arranged in described biography square cylinder (30);
Lower contact (20b), is connected with described central tube (40);
Pars contractilis (60), the outer peripheral face being arranged at described central tube (40) is movably given up between accessory (10) and described central tube (40) described in being positioned at, and one end and the described lower contact (20b) of described pars contractilis (60) abut against;
Elastic claw (70), one end is connected with the other end of described pars contractilis (60);
Fluid power shear pin (80a), is connected between described central tube (40) and described elastic claw (70);
When fluid power shear pin (80a) be in not by cut off original state time, the other end of described elastic claw (70) is connected with described accessory of giving up (10) and abuts against with described lower contact (20b); When fluid power shear pin (80a) is cut off, described pars contractilis (60) extends, the other end of described elastic claw (70) and described accessory of giving up (10) are separated and away from described lower contact (20b), described in accessory (10) of giving up given up.
2. releasing tool according to claim 1, is characterized in that, described releasing tool also comprises:
Machinery shear pin (80b), connect described biography square cylinder (30), described central tube (40) and described top connection (20a), one end of described biography square cylinder (30) is connected rotationally with described top connection (20a);
Wherein, when described top connection (20a) rotates clockwise relative to described biography square cylinder (30), described mechanical shear pin (80b) is in not by the original state of cutting off; When described top connection (20a) rotates counterclockwise relative to described biography square cylinder (30), described mechanical shear pin (80b) is cut off, described top connection (20a) promotes described central tube (40) and moves to described fluid power shear pin (80a) and cut off, the other end of described elastic claw (70) and described accessory of giving up (10) are separated and away from described lower contact (20b), described in accessory (10) of giving up given up.
3. releasing tool according to claim 2, is characterized in that, described top connection (20a) has spaced groove, and one end of described biography square cylinder (30) has the projecting connecting portion suitable with described groove,
When described top connection (20a) rotates clockwise relative to described biography square cylinder (30), the top of described connecting portion and described top connection (20a) abut against near the bottom of described biography square cylinder (30); When described top connection (20a) rotates counterclockwise relative to described biography square cylinder (30), described connecting portion stretches in described groove.
4. releasing tool according to claim 3, is characterized in that, described releasing tool also comprises:
Carriage (90a), the outer peripheral face being slidably disposed in described central tube (40) along described central tube (40) axial direction is arranged in the gathering sill (31) of described biography square cylinder (30);
Elastomeric element (90b), telescopically is arranged between the bottom of described top connection (20a) and described carriage (90a);
Described accessory of giving up (10) has groove (11) towards one end of described top connection (20a), the opening of described groove (11) is towards described top connection (20a), described groove (11) is positioned at the outside of described gathering sill (31) and correspondingly with described gathering sill (31) arranges, when described top connection (20a) rotates counterclockwise relative to described biography square cylinder (30), described top connection (20a) compress described elastomeric element (90b) with make described carriage (90a) move to described in give up accessory (10) towards in the groove (11) in described top connection (20a) direction.
5. releasing tool according to claim 4, is characterized in that, described carriage (90a) comprising:
Spacing ring (91), is set in the periphery of described central tube (40) slidably and is positioned between the central tube limited step (41) on described elastomeric element (90b) and described central tube (40) periphery;
Moment of torsion block (92), be connected to the external surface of described spacing ring (91) highlightedly, when described top connection (20a) rotates counterclockwise relative to described biography square cylinder (30), described top connection (20a) is compressed described elastomeric element (90b) and is moved in described groove (11) to make described moment of torsion block (92).
6. releasing tool according to claim 5, is characterized in that, described pars contractilis (60) comprising:
Piston rod (61), one end of described piston rod (61) is connected with described central tube (40);
Piston (62), one end is connected with the other end of described piston rod (61), and the other end and described lower contact (20b) abut against.
7. releasing tool according to claim 6, is characterized in that, described releasing tool also comprises linkage (50), and described linkage (50) comprising:
Tube connector (51), the outer peripheral face being sheathed on described central tube (40) towards the direction of described top connection (20a) is slidably connected with one end of described elastic claw (70), and described tube connector (51) is positioned between described carriage (90a) and described lower contact (20b).
8. releasing tool according to claim 7, is characterized in that, described linkage (50) also comprises:
Lock ring (52), the outer peripheral face being fixedly connected on described central tube (40) is positioned between described tube connector (51) and described central tube (40), described lock ring (52) has the lobe tilted towards described top connection (20a) direction, and the inner surface of described tube connector (51) has the teeth groove suitable with described lobe.
9. releasing tool according to claim 8, is characterized in that, described linkage (50) also comprises snap ring (53), is set on the outer peripheral face of described tube connector (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420806556.5U CN204457529U (en) | 2014-12-17 | 2014-12-17 | Releasing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420806556.5U CN204457529U (en) | 2014-12-17 | 2014-12-17 | Releasing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204457529U true CN204457529U (en) | 2015-07-08 |
Family
ID=53664431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420806556.5U Withdrawn - After Issue CN204457529U (en) | 2014-12-17 | 2014-12-17 | Releasing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204457529U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756595A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Releasing tool |
| CN107288563A (en) * | 2016-03-31 | 2017-10-24 | 中国石油天然气股份有限公司 | Releasing tool |
| CN108019159A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Mechanical back-off sub |
-
2014
- 2014-12-17 CN CN201420806556.5U patent/CN204457529U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756595A (en) * | 2014-12-17 | 2016-07-13 | 中国石油天然气股份有限公司 | Releasing tool |
| CN105756595B (en) * | 2014-12-17 | 2019-07-05 | 中国石油天然气股份有限公司 | Releasing tool |
| CN107288563A (en) * | 2016-03-31 | 2017-10-24 | 中国石油天然气股份有限公司 | Releasing tool |
| CN107288563B (en) * | 2016-03-31 | 2023-04-25 | 中国石油天然气股份有限公司 | Releasing tool |
| CN108019159A (en) * | 2016-11-04 | 2018-05-11 | 天津汇铸石油设备科技有限公司 | Mechanical back-off sub |
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