CN212079245U - Mechanical and hydraulic dual-functional composite releasing tool - Google Patents
Mechanical and hydraulic dual-functional composite releasing tool Download PDFInfo
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- CN212079245U CN212079245U CN201922146034.2U CN201922146034U CN212079245U CN 212079245 U CN212079245 U CN 212079245U CN 201922146034 U CN201922146034 U CN 201922146034U CN 212079245 U CN212079245 U CN 212079245U
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Abstract
The utility model discloses a mechanical hydraulic dual-function composite releasing tool, which comprises an upper joint, a connecting sleeve, a supporting stop block, a lower joint, a ball seat, a shearing pin, an intercepting sleeve, a ball and a sealing washer; the middle part of the outer wall of the upper joint is provided with a step which contracts inwards, the outer wall above the step is a first outer wall, the outer wall below the step is a second outer wall, and an upper joint stop groove is arranged at the boundary of the first outer wall and the end face of the step; a through groove is formed in the middle of the second outer wall; the middle part of the inner wall of the connecting sleeve is provided with an annular groove; the connecting sleeve is sleeved on the outer side of the second outer wall of the upper joint, and a connecting sleeve stop groove is formed in the upper portion of the connecting sleeve; the supporting stop block is arranged in the through groove of the upper joint. The utility model discloses possess the dual function of hydraulic pressure releasing and mechanical releasing instrument simultaneously, solved current conventional releasing instrument single releasing side and have the limitation to and there is the problem that structure processing is complicated, loading and unloading difficulty, use reliability and security are not high in current compound releasing technique, simple structure, the loading and unloading is easy, convenient and practical.
Description
Technical Field
The utility model relates to an oil gas field development technical field specifically is a difunctional compound releasing tool of machinery hydraulic pressure.
Background
When the operation of lowering the completion support string is performed, the string is usually required to be placed to a predetermined position by a releasing tool after being put in place, so as to ensure that the subsequent operation is smoothly performed. The common releasing tool mainly adopts a ball-throwing hydraulic releasing, back-off mechanical releasing or hydrostatic pressure releasing mode, although the modes are common technical schemes, the single releasing modes adopted at present have the defects that: if a throwing ball thrower is used, when a highly-deviated well and a directional well are operated, due to the problem of the inclination angle, the ball and the ball seat are easy to be sealed untight, so that the ball thrower fails, and once the throwing ball thrower cannot be used smoothly, a tubular column is proposed for treatment, so that the waste of cost, resources and time is caused. Similarly, the same problem can exist with mechanical release.
Chinese patent No. CN204492719U discloses a ball throwing type hydraulic back-off dual-purpose releasing gadget, which is mainly characterized in that: the piston is sleeved in the connecting sleeve and can be ensured to axially slide on the inner wall of the connecting sleeve, and the connecting sleeve is provided with a shear pin for temporarily limiting the axial sliding of the piston; the fishing head is arranged below the connecting sleeve, a radial locking block through hole used for installing a locking block is formed in the wall of the connecting sleeve, the inner end of the locking block is flush with and abuts against the outer wall of the piston, the outer end of the locking block is spherical and protrudes out of the outer wall of the connecting sleeve, a locking block sleeve is sleeved outside the connecting sleeve at the position of the locking block, a spherical groove is formed in the inner part of the locking block sleeve, the outer end of the locking block abuts against the spherical groove, and the lower end of the locking block sleeve is connected with the upper end of the fishing head. The method is further characterized in that: the piston is a cylindrical straight pipe, the outer wall of the piston above the locking block is provided with a release space for enabling the locking block to retract radially, the inner side of the upper port of the piston is provided with a sealing surface matched with the steel ball surface, the outer wall of the upper port of the piston is tightly attached to the inner wall of the connecting sleeve, namely, a boss is formed by the outer wall of the upper port of the piston and the release space, when the shear pin is pressed to be broken, the locking block retracts into the release space, and the boss is hung on the locking block to prevent the piston from falling off downwards with the connecting sleeve. The method is further characterized in that: the radial retraction distance of the release space is greater than or equal to the distance of the locking block protruding out of the outer wall of the connecting sleeve and smaller than the overall radial width of the locking block. The method is further characterized in that: the lower end of the fishing head is connected with the lower joint through reverse threads, the upper end of the fishing head is connected with the locking block sleeve through the reverse threads, after the locking block retracts into the releasing space, the spherical groove of the locking block sleeve loses the suspension force of the locking block, and the locking block sleeve, the fishing head and the lower joint which are connected into a whole are lost in the well. The method is further characterized in that: the upper end of the connecting sleeve is connected with an upper joint.
The disclosed technical scheme can achieve the purpose of hydraulic and mechanical composite releasing to a certain extent, but according to the disclosed characteristic principle, to achieve mechanical back-off releasing, the lock block sleeve must be ensured to rotate along with the connecting sleeve and all drilling tools on the upper part of the connecting sleeve, so that the lock block sleeve, the connecting sleeve and the lock block cannot rotate relatively; simultaneously, according to the further characteristics of this patent publication when the shear pin pressurized breaks, in the locking piece withdrawal release space, the boss hung on the locking piece, prevented that the piston from dropping with the adapter sleeve downwards, promptly: after the shear pin is cut off, the piston and the locking block are still left in the connecting sleeve, and the piston, the locking block and the connecting sleeve are not separated from each other and still have a certain restriction relation, so that the tool needs to be further disassembled or processed when being subsequently maintained and overhauled, the use effect is influenced, and the maintenance cost is increased; secondly, according to the further characteristics that this patent is disclosed the first lower extreme of salvaging passes through the left-hand thread connection lower clutch, and the first upper end of salvaging passes through left-hand thread connection locking piece cover, and consequently there are two left-hand threads in the first of salvaging, when adopting machinery back-off to give up, can cause the screw thread to throw off the position uncertain, probably makes the first of salvaging drop and there is the safety risk in dropping into the well from locking piece cover or lower clutch, and in addition, after the shear pin falls absolutely, the part of breaking off also can directly fall into the well owing to not blockking.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the utility model is to provide a difunctional compound releasing tool of mechanical hydraulic pressure, it possesses hydraulic pressure releasing and mechanical releasing tool's dual function simultaneously, has solved the single releasing side of current conventional releasing tool and has had the limitation to and there is the problem that structure processing is complicated, loading and unloading difficulty, use reliability and security are not high in current compound releasing technique, simple structure, and loading and unloading are easy, convenient and practical.
The technical scheme of the utility model as follows:
a mechanical-hydraulic dual-function composite releasing tool comprises an upper joint, a connecting sleeve, a supporting stop block, a lower joint, a ball seat, a shearing pin, an intercepting sleeve, a ball and a sealing washer;
the upper joint is a hollow pipe body, the middle part of the outer wall of the upper joint is provided with a step which contracts inwards, the outer wall above the step is a first outer wall, the outer wall below the step is a second outer wall, and the boundary between the first outer wall and the end face of the step is provided with upper joint stop grooves which are symmetrically and uniformly distributed; the middle part of the second outer wall is provided with symmetrical and uniform through grooves, and the lower part of the second outer wall is provided with symmetrical and uniform threaded holes for fixing the shearing pins;
the connecting sleeve is a hollow pipe body, an annular groove is formed in the middle of the inner wall of the connecting sleeve, and left-hand threads are formed in the bottom of the connecting sleeve; the connecting sleeve is sleeved on the outer side of the second outer wall of the upper joint, a connecting sleeve stop groove is formed in the upper portion of the connecting sleeve, the upper joint stop groove is matched with the connecting sleeve stop groove, and a thread section is formed in the bottom of the connecting sleeve;
the number of the supporting stop blocks is at least 2, the supporting stop blocks are symmetrically and uniformly arranged in the through groove matched with the upper joint, the upper end surface and the lower end surface of the protruding part of the outer wall of the upper joint are matched with the upper end surface and the lower end surface of the annular groove of the inner wall of the connecting sleeve, and the connecting sleeve is axially limited relative to the upper joint;
the lower joint is a hollow pipe body, the upper part and the lower part of the lower joint are provided with threads, the middle part of the lower joint is provided with a thickened section, the threads on the upper part of the lower joint are left-hand threads and are connected with the thread sections at the bottom of the connecting sleeve, and the threads on the lower part of the lower joint are conversion threads;
the ball seat is arranged in the upper joint, the inner wall of the upper end face of the ball seat is a conical surface, pressure relief holes which are uniformly distributed are arranged below the conical surface, and the outer wall of the bottom of the ball seat is provided with one or more annular grooves; the shear pin is uniformly arranged between the upper joint and the ball seat, and temporarily keeps the position of the ball seat relative to the upper joint in an axial direction limited; the outer wall of the upper part of the ball seat is in contact with the inner wall of the supporting stop block, so that the supporting stop block is kept limited in radial position; the sealing washer is arranged between the inner wall of the upper joint and the outer wall of the ball seat, so that a gap between the outer wall of the ball seat and the inner wall of the upper joint is blocked up and down; the intercepting sleeve is of a cylindrical structure with a closed bottom end, and a plurality of through holes are formed in the side wall and the bottom end face of the intercepting sleeve.
Preferably, the size of an inner hole of the intercepting sleeve is the same as the diameter of the inner hole of the ball seat, the diameter of a through hole of the intercepting sleeve is not higher than the diameter of the shearing pin, meanwhile, the sum of the sectional areas of all the through holes is larger than or equal to the sectional area of the inner hole of the ball seat, and the intercepting sleeve is fixed at the bottom end of the upper joint.
Preferably, the upper joint stop groove is a rectangular sawtooth groove uniformly distributed on the outer wall of the upper joint, and the concave-convex shape of the sawtooth is matched with the stop groove of the connecting sleeve. By such design, the groove ensures that the connecting sleeve cannot rotate circumferentially relative to the upper joint but can slide axially relative to the upper joint.
Preferably, the conversion thread is an internal thread or an external thread, and the thread rotation direction of the back-off thread is always opposite to the rotation direction of the conversion thread.
Preferably, the contact line of the section of the support stop and the annular groove on the inner wall of the connecting sleeve has a certain inclination angle relative to the radial direction, and the inclination angle is not less than 30 degrees. When the ball seat moves downwards to be separated from the supporting stop block, the supporting stop block can automatically separate inwards under the gravity action of the connecting sleeve, and the connecting sleeve is completely released.
Preferably, the surface hardness of the material adopted by the connecting sleeve is greater than that of the lower joint. When the mechanical back-off is released, the threads are more easily disengaged.
The utility model discloses an useful part lies in:
1. the mechanical and hydraulic dual-function composite releasing tool of the utility model has the dual functions of a hydraulic releasing tool and a mechanical releasing tool; on site, a proper releasing mode can be selected according to actual conditions, and meanwhile, when a certain releasing mode has problems and is difficult to release, other releasing modes can be adopted for releasing;
2. by applying the connecting sleeve of the utility model, the structure of the inner wall of the connecting sleeve which is matched with the supporting stop block is an annular groove, the mutual alignment direction is not needed to be considered during installation, and the assembly is simple;
3. by applying the lower joint of the utility model, the upper and lower end threads are always opposite, only one part is disengaged when the machine is released, and the reliability is high;
4. by using the sawtooth rectangular sawtooth concave-convex groove structure of the lower joint and the connecting sleeve of the utility model, the structure is simple and practical, and the disassembly and the assembly are convenient;
5. when the mechanical and hydraulic dual-function composite releasing tool is applied, under normal conditions, as the total area of the flow holes of the intercepting sleeve is equal to the area of the inner hole of the ball seat, the accidental releasing caused by the falling of the ball seat due to throttling can not be caused;
6. after releasing, the ball seat, the ball, the supporting check block, the shearing pin and the like fall into the lower intercepting sleeve, then the well head is lifted out along with the drilling tool, all parts can be taken out by opening the intercepting sleeve, and later maintenance and overhaul are not influenced.
Drawings
FIG. 1 is a schematic diagram of a half-section structure of a mechanical and hydraulic dual-function composite releasing tool according to the present invention;
FIG. 2 is a schematic diagram of the external structure of an upper joint applying the mechanical and hydraulic dual-function composite releasing tool shown in FIG. 1;
fig. 3 is an enlarged sectional view of a portion of the structure of fig. 1.
The labels in the figure are:
1-upper joint, 2-connecting sleeve, 3-supporting block, 4-lower joint, 5-ball seat, 6-shearing pin, 7-intercepting sleeve, 8-ball, 9-sealing washer, 11-upper joint stop groove, 12-through groove, 13-threaded hole, 21-connecting sleeve stop groove, 41-left thread and 42-conversion thread.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
As shown in fig. 1, a mechanical-hydraulic dual-function composite releasing tool comprises an upper joint 1, a connecting sleeve 2, a supporting stop block 3, a lower joint 4, a ball seat 5, a shearing pin 6, an intercepting sleeve 7, a ball throwing 8 and a sealing washer 9; the upper joint is a hollow pipe body, the middle part of the outer wall of the upper joint is provided with a step which contracts inwards, the outer wall above the step is a first outer wall, the outer wall below the step is a second outer wall, and the boundary between the first outer wall and the end face of the step is provided with upper joint stop grooves 11 which are symmetrically and uniformly distributed; the middle part of the second outer wall is provided with symmetrical and uniform through grooves 12, and the lower part of the second outer wall is provided with symmetrical and uniform threaded holes 13 for fixing the shearing pins 6; the connecting sleeve 2 is a hollow pipe body, an annular groove is formed in the middle of the inner wall of the connecting sleeve, and a back-off thread 41 is formed in the bottom of the connecting sleeve; the connecting sleeve 2 is sleeved on the outer side of the second outer wall of the upper connector 1, a connecting sleeve stop groove 21 is formed in the upper portion of the connecting sleeve 2, the upper connector stop groove 11 is matched with the connecting sleeve stop groove 21, and a thread section is formed in the bottom of the connecting sleeve 2; the number of the supporting stop blocks 3 is at least 2, the supporting stop blocks are symmetrically and uniformly arranged in a through groove matched with the upper joint 1, the upper end surface and the lower end surface of a protruding part of the outer wall of the upper joint 1 are matched with the upper end surface and the lower end surface of an annular groove of the inner wall of the connecting sleeve 2, and the connecting sleeve 2 is axially limited relative to the upper joint 1; the lower joint 4 is a hollow pipe body, the middle part of the lower joint is provided with a thickened section, the upper part and the lower part of the lower joint are provided with threads, the upper threads are left-hand threads 41 and are connected with the thread sections at the bottom of the connecting sleeve 2, and the lower threads are conversion threads 42; the ball seat 5 is arranged in the upper joint 1, the inner wall of the upper end face of the ball seat is a conical surface, pressure relief holes which are uniformly distributed are arranged below the conical surface, and the outer wall of the bottom of the ball seat is provided with one or more annular grooves; the shear pin is uniformly arranged between the upper joint and the ball seat, and temporarily keeps the position of the ball seat relative to the upper joint in an axial direction limited; the outer wall of the upper part of the ball seat 5 is contacted with the inner wall of the supporting stop 3, so that the supporting stop 3 is kept limited in radial position; the sealing washer 9 is arranged between the inner wall of the upper joint 1 and the outer wall of the ball seat 5, so that a gap between the outer wall of the ball seat 5 and the inner wall of the upper joint 1 is blocked up and down.
The intercepting sleeve 7 is of a cylindrical structure with a closed bottom end, the size of an inner hole of the intercepting sleeve is the same as the diameter of the inner hole of the ball seat, a plurality of through holes are formed in the side wall and the bottom end face of the intercepting sleeve, the diameters of all the through holes are not higher than the diameter of the shearing pin, meanwhile, the sum of the sectional areas of all the through holes is larger than or equal to the sectional area of the inner hole of the ball seat 5, and the intercepting sleeve 7 is fixed at.
The upper joint stopping grooves 11 are rectangular saw-tooth grooves evenly distributed on the outer wall of the upper joint 1, and the concave-convex shape of the saw teeth of the upper joint is matched with the connecting sleeve stopping grooves 21. The conversion thread 42 is an internal thread or an external thread depending on the thread orientation of its lower connection string, and the thread rotation direction of the back-off thread is always opposite to the rotation direction of the conversion thread. The contact line of the section of the supporting stop block 3 and the annular groove in the inner wall of the connecting sleeve 2 has an inclination angle of not less than 30 degrees relative to the radial direction, and the inclination angle has the effect of facilitating the later separation of the supporting stop block 3.
The utility model discloses a working method as follows:
1. when the pipe column is put in place and needs to be released by hydraulic pressure, the ball throwing operation is carried out from the well mouth, the pump of the well mouth is started to be suppressed after the ball falls to the ball seat 5, the resultant force action direction of the ball 8 is downward, the contact surface of the ball 8 and the inner wall of the ball seat 5 and the sealing washer 9 have double sealing action to prevent the upper medium at the contact part of the ball seat 5 from flowing downward, the larger the resultant force action is, the tighter the contact surface is, the harder the upper medium flows downward until the shearing pin 6 can not bear the resultant force, the shearing force transmitted to the shearing pin 6 is greater than the maximum shearing force of the shearing pin 6 to be cut, the ball seat 5 slides axially relatively, the support block 3 is separated inwards after the ball seat 5 moves downwards, the connecting sleeve 2 and all pipe columns at the lower part of the connecting sleeve 2 fall off to complete the releasing, and the ball seat 5, the ball 8, the support block 3, the, then, the drilling tool is lifted out of the wellhead, all parts can be taken out by opening the intercepting sleeve 7, and the later maintenance and overhaul are not influenced;
2. when a mechanical releasing tool is needed, the drilling tool is directly and continuously rotated in the forward direction, the connecting sleeve 2 rotates along with the drilling tool due to the limitation of the stop clamping groove, the connecting pipe column below the lower left-hand thread 41 is slowly reversed due to the action of gravity and bottom friction force and finally falls into a well to complete releasing, and the connecting sleeve 2 and all components on the upper portion of the connecting pipe column are lifted out of a well head along with the drilling tool.
3. On the spot, a proper releasing mode can be selected according to actual conditions, and meanwhile, when a certain releasing mode has problems and is difficult to release, other releasing modes can be adopted for releasing.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (5)
1. A mechanical and hydraulic dual-function composite releasing tool is characterized by comprising an upper joint (1), a connecting sleeve (2), a supporting stop block (3), a lower joint (4), a ball seat (5), a shearing pin (6), an intercepting sleeve (7), a ball (8) and a sealing gasket (9);
the upper joint is a hollow pipe body, the middle part of the outer wall of the upper joint is provided with a step which contracts inwards, the outer wall above the step is a first outer wall, the outer wall below the step is a second outer wall, and the boundary between the first outer wall and the end face of the step is provided with upper joint stop grooves (11) which are symmetrically and uniformly distributed; the middle part of the second outer wall is provided with symmetrical and uniform through grooves (12), and the lower part of the second outer wall is provided with symmetrical and uniform threaded holes (13);
the connecting sleeve (2) is a hollow pipe body, an annular groove is formed in the middle of the inner wall of the connecting sleeve, and left-hand threads (41) are formed in the bottom of the connecting sleeve; the connecting sleeve (2) is sleeved on the outer side of the second outer wall of the upper joint (1), a connecting sleeve stop groove (21) is formed in the upper portion of the connecting sleeve (2), the upper joint stop groove (11) is matched with the connecting sleeve stop groove (21), and a thread section is formed in the bottom of the connecting sleeve (2);
the supporting stop blocks (3) are at least not less than 2, symmetrically and uniformly arranged in a through groove matched with the upper joint (1), and the upper end surface and the lower end surface of a protruding part of the outer wall of the upper joint (1) are matched with the upper end surface and the lower end surface of an annular groove in the inner wall of the connecting sleeve (2), so that the connecting sleeve (2) is axially limited relative to the upper joint (1);
the lower joint (4) is a hollow pipe body, the upper part and the lower part of the lower joint are provided with threads, the middle part of the lower joint is provided with a thickened section, the threads on the upper part of the lower joint are left-hand threads and are connected with the thread sections at the bottom of the connecting sleeve (2), and the threads on the lower part of the lower joint are conversion threads;
the ball seat (5) is arranged in the upper connector (1), the inner wall of the upper end face of the ball seat is a conical surface, pressure relief holes which are uniformly distributed are formed below the conical surface, and one or more annular grooves are formed in the outer wall of the bottom of the ball seat; the shear pin is uniformly arranged between the upper joint and the ball seat, and temporarily keeps the position of the ball seat relative to the upper joint in an axial direction limited; the outer wall of the upper part of the ball seat (5) is in contact with the inner wall of the supporting stop block (3) so that the supporting stop block (3) is kept limited in radial position; the sealing washer (9) is arranged between the inner wall of the upper joint (1) and the outer wall of the ball seat (5), so that a gap between the outer wall of the ball seat (5) and the inner wall of the upper joint (1) is blocked up and down;
the intercepting sleeve (7) is of a cylindrical structure with a closed bottom end, and a plurality of through holes are formed in the side wall and the bottom end face of the intercepting sleeve.
2. The mechanical hydraulic dual-function composite releasing tool as claimed in claim 1, wherein the size of the inner hole of the intercepting sleeve (7) is the same as the diameter of the inner hole of the ball seat (5), the diameter of the through hole of the intercepting sleeve (7) is not higher than the diameter of the shear pin, meanwhile, the sum of the cross-sectional areas of all the through holes is larger than or equal to the cross-sectional area of the inner hole of the ball seat (5), and the intercepting sleeve (7) is fixed at the bottom end of the upper joint (1).
3. The mechanical-hydraulic dual-function composite releasing tool as claimed in claim 2, wherein the upper joint stopping grooves (11) are rectangular saw-tooth grooves evenly distributed on the outer wall of the upper joint (1), and the concave-convex shape of the saw teeth of the upper joint is matched with the connecting sleeve stopping grooves (21).
4. The mechanical-hydraulic dual-function composite releasing tool as claimed in claim 3, wherein the switching thread (42) is an internal thread or an external thread, and the thread rotation direction of the reverse thread is always opposite to the rotation direction of the switching thread.
5. The mechanical-hydraulic dual-function composite releasing tool as claimed in claim 4, wherein the contact line of the cross section of the supporting block (3) and the annular groove on the inner wall of the connecting sleeve (2) has an inclination angle of not less than 30 ° with respect to the radial direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146034.2U CN212079245U (en) | 2019-12-04 | 2019-12-04 | Mechanical and hydraulic dual-functional composite releasing tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922146034.2U CN212079245U (en) | 2019-12-04 | 2019-12-04 | Mechanical and hydraulic dual-functional composite releasing tool |
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| CN212079245U true CN212079245U (en) | 2020-12-04 |
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| CN201922146034.2U Active CN212079245U (en) | 2019-12-04 | 2019-12-04 | Mechanical and hydraulic dual-functional composite releasing tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075758A (en) * | 2021-03-10 | 2022-09-20 | 中国石油化工股份有限公司 | Hydraulic composite releasing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115075758A (en) * | 2021-03-10 | 2022-09-20 | 中国石油化工股份有限公司 | Hydraulic composite releasing device |
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