CN203515410U - Releasing tool - Google Patents
Releasing tool Download PDFInfo
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- CN203515410U CN203515410U CN201320699750.3U CN201320699750U CN203515410U CN 203515410 U CN203515410 U CN 203515410U CN 201320699750 U CN201320699750 U CN 201320699750U CN 203515410 U CN203515410 U CN 203515410U
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- core pipe
- slips
- boss
- sealing
- lock ring
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- 238000007789 sealing Methods 0.000 claims abstract description 81
- 230000002093 peripheral effect Effects 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 8
- 230000004323 axial length Effects 0.000 claims description 6
- 239000002131 composite material Substances 0.000 description 16
- 238000010276 construction Methods 0.000 description 8
- 229920000459 Nitrile rubber Polymers 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000003566 sealing material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000368 destabilizing effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model discloses a releasing tool. The releasing tool comprises a connector, a core pipe, a spring, a top sleeve, a connecting cylinder, a slip, a sealing device, a guiding shoe, a mother lock ring, a limit cylinder and a sealing cylinder, wherein the first end of the core pipe is fixedly and hermetically connected with the connector; the connecting cylinder sleeved outside the core pipe is fixedly connected with the connector; an annulus is formed between the connecting cylinder and the core pipe; the core pipe is sequentially sleeved with the spring, the top sleeve, the slip and the sealing device; the slip can slide in the axial direction of the core pipe; a left-hand buttress external thread is formed on the slip; the slip is divided into a plurality of parts in the circumferential direction; an internal inclined plane is arranged at one end part of the slip; the core pipe is provided with an inclined surface boss corresponding to the internal inclined plane; a first boss is formed on the core pipe; a second boss corresponding to the first boss is formed on the inner surface of the slip; the sealing device, which is used for sealing the gap between the core pipe and the sealing cylinder, is sleeved at the second end of the core pipe; the second end of the core pipe is connected with the guiding shoe; the mother lock ring is arranged in the limit cylinder and can slide in the axial direction; the sealing cylinder is fixedly connected with the limit cylinder; a left-hand buttress internal thread is formed on the mother lock ring. The releasing tool is easy to assemble and operate.
Description
Technical field
The utility model relates to a kind of releasing tool, belongs to Oil/gas Well downhole tool technical field.
Background technology
In order to improve oil, gas recovery ratio, oil field more and more adopts the drilling mode of horizontal well both at home and abroad, and in the completion mode of horizontal well, a lot of wells are selection level well subsection acidizing pressure break barefoot completion mode again, in implementing acid fracturing volume increase work progress, releasing tool has been born and staged fracturing tool pipe string is sent into well and instrument has been completed the task of giving up after setting.Therefore whether the performance direct relation acid fracturing of releasing tool volume increase construction can complete smoothly.Through facts have proved, releasing tool is extremely important instrument in staged fracturing tool, is also one of instrument that risk is the highest, gives up and operate etc. in operating principle, structure design and the scene that these risks are mainly derived from instrument itself.
The mode of giving up of the releasing tool using on market at present, mainly contains that hydraulic releasing, reversion are given up, forward gives up.These releasing tool complex structures, assembling difficulty is large, large, the follow-up tieback of execute-in-place difficulty, pressure break have a big risk, and need to have the unreliable factors such as instrument cooperation on special anti-upper top many, to construction, has brought larger risk.Hydraulic releasing tool complex structure, cost are high, assembling difficulty is large, in work progress, pressure, lower instrument speed are controlled and are required highly, may cause in advance and give up, and risk is high; Reversion is given up and is easily caused in advance and give up on the one hand in mode work progress, and constructing operation difficulty is large on the other hand, easily causes other instrument connection of thread back-offs, has a big risk.In addition, traditional releasing tool need to insert tieback plug in follow-up tieback, pressure break, and need to be equipped with special anti-upper top instrument, has increased construction risk.
In the market the forward releasing tool similar to the design at the scene in work progress operation easier larger, in the operating process of giving up, first the tubing string point of neutralization is controlled to requirement higher, in order to reduce the stressed of screw thread place, need then forward 2 circles of 3 tons, upper lifting pipe post, until suspending weight is zero, then on carry 3 tons after forward 2 circles, so repeatedly, carry, forward, whole process need forward 12 to 13 circles of giving up just can complete and give up.Therefore traditional forward complicated operation of giving up.If not repeatedly on carry, forward: one, possibly cannot complete forward give up; Two, may cause thread damage, thread damage will directly affect normally gives up and the tieback work of follow-up tieback string, to construction, brings larger risk.
In view of problem and defect that above-mentioned existing releasing tool in use exists, the design people is actively studied and is innovated, and to invent a kind of releasing tool, eliminates the defect that prior art exists, and makes it more have practicality.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provide a kind of can releasing tool, simple in structure, be easy to assembling and operation.
In order to solve the problems of the technologies described above, the utility model has adopted following technical scheme:
A kind of releasing tool, comprise joint, core pipe, spring, top cover, connecting cylinder, slips, sealing device, guide shoe, female lock ring, position-limiting drum and sealing drum, described core pipe comprises first end and the second end, the first end of described core pipe is fixedly connected with described joint sealing, it is outside that described connecting cylinder is placed on core pipe, and connecting cylinder is fixedly connected with described joint, between described connecting cylinder and core pipe, form annular space, between described core pipe first end to the second end, cover has spring successively, top cover, slips and sealing device, its medi-spring, top cover and part slips are positioned at described annular space, described spring by top cover to slips applied thrust, described slips and described core pipe are circumferentially located, and described slips and described core pipe axially can relative slidings, one end that described slips and top cover offset is force side, the other end of described slips is keyed end, in the periphery of described keyed end, there is left-hand thread sawtooth external screw thread, described slips at least keyed end is upwards divided into a plurality of parts by axial cut-outs in week, the end of described keyed end has interior inclined-plane, on the outer peripheral face of described core pipe, there is the inclined-plane boss that makes accordingly slips radial dilatation with the interior inclined-plane of keyed end, on the excircle of described core pipe, there is the first boss that restriction slips moves to core pipe the second end, the inner surface of described slips has and corresponding the second boss of the first boss, described sealing device is placed on the second end of described core pipe, described sealing device is for the sealing between core pipe and sealing drum, the end of the second end of core pipe is connected with described guide shoe, it is inner that described female lock ring is located at described position-limiting drum, one end of described sealing drum is stretched into one end of described position-limiting drum and is fixedly connected with position-limiting drum, the inwall of described position-limiting drum has the 4th boss, described female lock ring is between described the 4th boss and described sealing drum, distance between described the 4th boss and described sealing drum is greater than the axial length of described female lock ring, described female lock ring and described position-limiting drum are circumferentially located, and described female lock ring can slide between the 4th boss and described sealing drum, on the inwall of described female lock ring, there is the suitable left-hand thread sawtooth internal thread of left-hand thread sawtooth external screw thread in the periphery with described keyed end.
As preferably, described slips integral body is combined by a plurality of parts that make progress in week, has many baffle plates that extend vertically on the outer peripheral face of described core pipe, and every part of described slips is embedded between two baffle plates.
As preferably, on the inner peripheral surface of described connecting cylinder, there is annular ridge, described top cover comprises path section and large footpath section, the external diameter of described path section is less than the external diameter of large footpath section, the internal diameter of described annular ridge is less than the external diameter of described large footpath section and is greater than the external diameter of described path section, described large footpath section is with respect to path section near spring one side, and described path section offsets through described annular ridge and described slips, and the external diameter of the force side of slips is greater than the internal diameter of annular ridge.
As preferably, between described female lock ring and described position-limiting drum, by corresponding spacing fin and the limited impression of axial setting, circumferentially locate.
As preferably, described sealing device comprises metal ring, on the inner peripheral surface of described metal ring and outer peripheral face, has seal groove, and sealing ring is set respectively in described seal groove, on the outer peripheral face of described core pipe, have the 3rd boss, described sealing device is fixed between described the 3rd boss and described guide shoe.
As preferably, the distance between described the 4th boss and described sealing drum is at least the twice of the axial length of described female lock ring.
As preferably, described joint and described core pipe are threaded connection, and between described joint and described core pipe, by holding screw, fix.
As preferably, between described joint and described core pipe, pass through seal with O ring.
As preferably, described joint is threaded with described connecting cylinder, between described joint and described connecting cylinder, by holding screw, fixes.
As preferably, described guide shoe is connected with described core gas thread, and by holding screw, fixes between described guide shoe and described core pipe.
As preferably, described position-limiting drum is threaded with described sealing drum, and by holding screw, fixes between described position-limiting drum and described sealing drum.
Compared with prior art, the beneficial effects of the utility model are:
Originally the advantage of releasing tool of the present utility model is, simple in structure, the destabilizing factor of avoiding labyrinth to bring is assembled simple, cost-saving simultaneously; Because main weight bearing area is left-hand thread buttless thread, this structure weight capacity is strong, can carry out flexible design according to load-bearing demand, first the design of left-hand thread buttless thread is difficult for causing midway giving up, then in follow-up tieback, pressing crack construction, this structure is more reliable, does not need to be equipped with special anti-upper top instrument, has made up this large defect of hydraulic releasing; Releasing tool of the present utility model utilizes between female lock ring and position-limiting drum circumferential location and feature that axially can relative sliding, needs the complexity of upper lifting pipe post repeatedly while having made up existing forward releasing tool site operation.To sum up, releasing tool has comprehensively reduced construction risk in give up stage, tieback and pressure break stage of instrument preparatory stage, lower pipe string.
Accompanying drawing explanation
Fig. 1 is that the structure of releasing tool of the present utility model is partly cutd open figure.
Fig. 2 is the A-A sectional view of Fig. 1.
Fig. 3 is the B portion enlarged drawing of Fig. 1.
Fig. 4 is the C portion enlarged drawing of Fig. 1.
Fig. 5 is the D portion enlarged drawing of Fig. 1.
Fig. 6 is the E portion enlarged drawing of Fig. 1.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
Fig. 1 is that the structure of releasing tool of the present utility model is partly cutd open figure, the A-A sectional view that Fig. 2 is Fig. 1, the B portion enlarged drawing that Fig. 3 is Fig. 1, the C portion enlarged drawing that Fig. 4 is Fig. 1, the D portion enlarged drawing that Fig. 5 is Fig. 1, the E portion enlarged drawing that Fig. 6 is Fig. 1.As shown in Figures 1 to 6, a kind of releasing tool, comprise composite member and lower composite member, upper composite member comprises joint 1, core pipe 2, spring 3, top cover 4, connecting cylinder 5, slips 6, sealing device 9 and guide shoe 10, and lower composite member comprises female lock ring 7, position-limiting drum and sealing drum, core pipe 2 is drawn together first end 201 and the second end 202, first end 201 and the joint 1 of core pipe 2 are sealedly and fixedly connected, connecting cylinder 5 is placed on core pipe 2 outsides, and connecting cylinder 5 is fixedly connected with joint 1, between connecting cylinder 5 and core pipe 2, form annular space 17, between core pipe 2 first end 201 to second ends 202, cover has spring 4 successively, top cover 5, slips 6 and sealing device 9, its medi-spring 4, top cover 5 and part slips 6 are positioned at annular space 17, spring 4 is by 5 pairs of slips 6 applied thrusts of top cover, slips 6 is circumferentially located with core pipe 2, and slips 6 and core pipe 2 axially can relative slidings, slips 6 is force side 601 with one end that top cover 5 offsets, the other end of slips 6 is keyed end 602, in the periphery of keyed end 602, there is left-hand thread sawtooth external screw thread, slips 6 at least keyed end 602 is upwards divided into a plurality of parts by axial cut-outs in week, the end of keyed end 602 has interior inclined-plane 621, on the outer peripheral face of core pipe 2, there is the inclined-plane boss 203 that makes accordingly slips 6 radial dilatation with the interior inclined-plane 621 of keyed end 602, on the excircle of core pipe 2, there is the first boss 204 that restriction slips 6 moves to core pipe 2 second ends 202, the inner surface of slips 6 has and corresponding the second boss 603 of the first boss 204, sealing device 9 is placed on the second end 202 of core pipe 2, sealing device 9 is for the sealing between core pipe 2 and sealing drum 11, the end of the second end 202 of core pipe 2 is connected with guide shoe 10, female lock ring 7 is located at position-limiting drum 8 inside, one end of sealing drum 11 is stretched into one end of position-limiting drum 8 and is fixedly connected with position-limiting drum, the inwall of position-limiting drum 8 has the 4th boss 801, female lock ring 7 is between the 4th boss 801 and sealing drum 11, distance between the 4th boss 801 and sealing drum 11 is greater than the axial length of female lock ring 7, female lock ring 7 is circumferentially located with position-limiting drum 8, and female lock ring 7 can slide between the 4th boss 801 and sealing drum 11, on the inwall of female lock ring 7, there is the suitable left-hand thread sawtooth internal thread of left-hand thread sawtooth external screw thread in the periphery with keyed end.
Releasing tool of the present utility model is simple and reliable for structure, simplifies tool assemble, improves tool assemble efficiency, overall reduction instrument cost; Employing forward is given up, and improves instrument supporting capacity, effectively avoids giving up midway, improves the reliability of instrument; Unique female lock ring structure design in axial sliding, make on-site construction operations simple, greatly reduce construction risk.The interior inclined-plane 621 of the keyed end 602 of slips 6 matches and makes keyed end 602 radial dilatation of slips 6 with inclined-plane boss 203 on core pipe 2, thereby has increased the adhesion between slips 2 and female lock ring 7, improves the reliability of releasing tool, avoids giving up midway.
As above-described embodiment preferably, in order to make the smooth radial dilatation of keyed end 602, to be keyed end 602 (determined according to actual conditions being upwards divided into a plurality of parts week by axial otch a kind of mode, generally be divided into 6-8 part), and the force side 601 of slips 6 is still axially continuous tubular, concrete structure can be with reference to the expand tube structure of expansion bolt.Now realize by the corresponding chute and the slide rail that axially arrange between the two the circumferential location between slips 6 and core pipe 2, and chute can be opened on slips 6 vertically, and the slide rail being embedded in accordingly in chute is located on core pipe 2.Certainly also can arrange conversely, chute is located on core pipe 2, and slide rail is located on slips 6.Referring to Fig. 2, to be slips 6 integral body (determined according to actual conditions being upwards divided into a plurality of parts week by axial otch another mode, generally be divided into 6-8 part), on the outer peripheral face of core pipe 2, have many baffle plates 205 that extend vertically, every part of slips 6 is embedded between two baffle plates 205.A kind of mode after adopting in the embodiment of Fig. 1, wherein slips 6 is upwards being divided into 7 parts week, 7 baffle plates 205 are axially set on the outer peripheral face of core pipe 2, and every part of slips 6 is stuck between two baffle plates 205, thereby realization is circumferentially located axially slidably.
As above-described embodiment preferably, referring to Fig. 3, on the inner peripheral surface of connecting cylinder 5, there is annular ridge 501, top cover 4 comprises path section 402 and large footpath section 401, the external diameter of path section 402 is less than the external diameter of large footpath section 401, and the internal diameter of annular ridge 501 is less than the external diameter of large footpath section 401 and is greater than the external diameter of path section 402, and large footpath section contacts with spring, path section offsets through annular ridge and slips, and the external diameter of the force side 601 of slips 6 is greater than the internal diameter of annular ridge 501.
In releasing tool of the present utility model, referring to Fig. 2, between female lock ring 7 and position-limiting drum 8, by corresponding spacing fin and the limited impression of axial setting, circumferentially locate.Certainly can be that spacing fin is arranged on the inner peripheral surface of position-limiting drum 8 vertically, and relative limited impression is located on the outer peripheral face of female lock ring vertically, also can be conversely, be that limited impression is arranged on the inner peripheral surface of position-limiting drum 8 vertically, and relative spacing fin is located on the outer peripheral face of female lock ring vertically.In the present embodiment, 3 spacing fins are uniformly distributed on the inner peripheral surface of position-limiting drum 8, and 3 corresponding limited impressions are located on the outer peripheral face of female lock ring 7.Certainly, the number of limited impression can be corresponding with the number of spacing fin, also the multiple of the number of spacing fin.And the number of spacing fin can be one or more.
In the utility model, sealing device 9 is for the sealing between core pipe 2 and sealing drum 11, and sealing device 9 can be the O shape circle in the seal groove being arranged on the outer peripheral face of core pipe 2.Certainly in order to improve sealing effectiveness and durability, in the present embodiment, sealing device 9 adopts joint ring, and referring to Fig. 6, the concrete structure of joint ring is as follows: sealing device 9 comprises metal ring 901, and outer peripheral face and the outer peripheral face of metal ring 901 are equipped with sealant.Sealant can adopt following two kinds of modes to arrange, and a kind of is outer peripheral face and/or the whole composite seal layer of outer peripheral face of metal ring, and the material of compound sealing material layer can be phosphatization nitrile rubber or other applicable materials.Another be metal ring inner peripheral surface and/have seal groove on outer peripheral face, the O shape circle of buying on sealing ring 902(market is set respectively, or the sealing ring of employing phosphatization nitrile rubber material in seal groove).Sealing material layer is set or sealing ring is set and can be used in combination also and can be used alone.While adopting joint ring, fixing on core pipe 2 of joint ring can be in the following way: on the outer peripheral face of core pipe 2, have the 3rd boss 206, sealing device is fixed between the 3rd boss 206 and guide shoe.Joint ring can be a plurality of uses of combining, the mode that adopts 4 packing ring combinations to use in the present embodiment.
In the utility model, the endwisely slipping of female lock ring 7 when the distance between the 4th boss 801 and sealing drum 11 at least should guarantee rotational release, this distance can be definite according to the length of the junction button between slips 6 and female lock ring 7.In the present embodiment, determine that the distance between the 4th boss 801 and sealing drum 11 is at least the twice of the axial length of female lock ring 7.So that female lock ring 7 has enough sliding distances while guaranteeing to give up.
In the utility model, for guaranteeing being fixedly connected with between two parts, many employings are threaded and add the fixing mode of holding screw.For example, joint 1 is threaded connection with core pipe 2, and fixing by holding screw 13 between joint 1 and core pipe 2.Between joint 1 and core pipe 2, by O shape circle 12, seal.
Joint 1 is threaded with connecting cylinder 5, and by holding screw, fixes between joint 1 and connecting cylinder 5.
Position-limiting drum 8 is threaded with sealing drum 9, and fixing by holding screw 14 between position-limiting drum 8 and sealing drum 9.
The utility model center tap 1 is the female female joint of tool.Equally, sealing drum 11 also has the internal thread being connected with oil pipe in tubing string or other pipe fittings.Joint 1 one end forms the first link, and the end of sealing drum 11 forms the second link.
The assembling of releasing tool of the present utility model is as follows: releasing tool of the present utility model assembling is divided into composite member and lower composite member two parts, upper composite member comprise female joint 1., core pipe 2, spring 3, top cover 4, connecting cylinder 5, slips 6, sealing device (adopting joint ring in the present embodiment) 9 and guide shoe 10.
4 seal ring sets are at core pipe 2 second ends 202, and joint ring outer peripheral face is phosphatization nitrile rubber, and 2 of joint ring and core pipes seal by 〇 type circle 15.Guide shoe 10 is connected with core pipe 2 by screw thread, and fixing with holding screw 16.Slips 6 is split-types, and slips 6 integral body are upwards being divided into 7 parts (7 lobe) week, and slips 6. each lobe is stuck in two axial baffles on core pipe 2, is used for limiting relatively rotating of slips 6 and core pipe 2; And the second boss 603 of the first boss 204 of the vertical axial of core pipe 2 and the inner surface of slips 6 interacts, limit the scope that slips 6 moves to core pipe 2 second ends 202.Connecting cylinder 5 is enclosed within on core pipe 2, and then successively top cover 4, spring 3 is enclosed within on core pipe 2, joint 1 is connected by trapezoidal thread with core pipe 2, and fixing with holding screw 13, between joint 1 and core pipe 2, by 〇 type circle 12, seals.Connecting cylinder 5 is connected by trapezoidal thread and fixes with holding screw with joint 1, and the annular ridge 501 in connecting cylinder 5 has following two effects: one, to 4 position-limiting actions of top cover; Two, in the assembling of upper composite member and lower composite member, rely on this annular ridge 501 spacing and promote slips 6, complete the assembling of slips 6 and female lock ring 7.The path section of top cover 4 heads on slips 6, and bigger diameter end heads on spring 3, and spring 3 relies on top cover 4 that elastic force is passed to slips 6, and the effect of spring 3 is mainly to head on slips 6 by top cover 4, and the end of slips 6 is withstood on the inclined-plane boss 203 of core pipe 2 all the time.
Lower composite member comprises female lock ring 7, position-limiting drum 8, sealing drum 11, and female lock ring 7 is loaded in position-limiting drum 8, then sealing drum 11 is threaded with position-limiting drum, and fixing with holding screw 14.On female lock ring 7 outer peripheral faces, there is the axial limited impression in 3 roads, inner peripheral surface has left-hand thread buttless thread, coincideing with the left-hand thread buttless thread of slips 6, (the sawtooth buckle teeth type of slips 6 is to joint 1 one sides, the sawtooth buckle teeth type of female lock ring 7 is to sealing drum one side), the inclined-plane boss 203 of core pipe 2 is used for the interior inclined-plane of keyed end 602 of supporting slip 6; Position-limiting drum 8 inner peripheral surfaces have the limited impression on the axial spacing fin in 3 roads and female lock ring 7 outer peripheral faces to coincide, for preventing what female lock ring 7 relative limit cylinders 8 from rotating, position-limiting drum 8 provides the track that can slide up and down for female lock ring 7, when forward is given up, female lock ring 7 is along with forward slowly moves down, until depart from slips 6, this Track desigh be realize in the on-the-spot operating process of giving up, do not need repeatedly on carry, the key structure of the complex operations such as forward; Sealing drum 11 inner peripheral surfaces are partly sealing surfaces, reach sealing function with the joint ring interference fit of upper composite member.
When upper composite member of the present utility model assembles mutually with lower composite member, guide shoe one end is inserted in sealing drum 11, joint ring is realized the sealing between core pipe 2 and sealing drum.Effect lower slips in thrust can directly insert (slips 6 departs from inclined-plane boss 203, and the direction of sawtooth buckle teeth causes) in female lock ring, also can adopt the mode of rotation that slips 6 is connected by anti-mouthful of buttless thread with female lock ring 7 as do not inserted smoothly.When giving up, will on instrument, carry, directly forward approximately 12～13 circles (length of thoroughly doing away with the design of sawtooth button can be adjusted) depart from composite member and lower composite member, complete and give up.
Above embodiment is only exemplary embodiment of the present utility model, is not used in restriction the utility model, and protection domain of the present utility model is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (11)
1. a releasing tool, it is characterized in that, comprise joint, core pipe, spring, top cover, connecting cylinder, slips, sealing device, guide shoe, female lock ring, position-limiting drum and sealing drum, described core pipe comprises first end and the second end, the first end of described core pipe is fixedly connected with described joint sealing, it is outside that described connecting cylinder is placed on core pipe, and connecting cylinder is fixedly connected with described joint, between described connecting cylinder and core pipe, form annular space, between described core pipe first end to the second end, cover has spring successively, top cover, slips and sealing device, its medi-spring, top cover and part slips are positioned at described annular space, described spring by top cover to slips applied thrust, described slips and described core pipe are circumferentially located, and described slips and described core pipe axially can relative slidings, one end that described slips and top cover offset is force side, the other end of described slips is keyed end, in the periphery of described keyed end, there is left-hand thread sawtooth external screw thread, described slips at least keyed end is upwards divided into a plurality of parts by axial cut-outs in week, the end of described keyed end has interior inclined-plane, on the outer peripheral face of described core pipe, there is the inclined-plane boss that makes accordingly slips radial dilatation with the interior inclined-plane of keyed end, on the excircle of described core pipe, there is the first boss that restriction slips moves to core pipe the second end, the inner surface of described slips has and corresponding the second boss of the first boss, described sealing device is placed on the second end of described core pipe, described sealing device is for the sealing between core pipe and sealing drum, the end of the second end of core pipe is connected with described guide shoe, it is inner that described female lock ring is located at described position-limiting drum, one end of described sealing drum is stretched into one end of described position-limiting drum and is fixedly connected with position-limiting drum, the inwall of described position-limiting drum has the 4th boss, described female lock ring is between described the 4th boss and described sealing drum, distance between described the 4th boss and described sealing drum is greater than the axial length of described female lock ring, described female lock ring and described position-limiting drum are circumferentially located, and described female lock ring can slide between the 4th boss and described sealing drum, on the inwall of described female lock ring, there is the suitable left-hand thread sawtooth internal thread of left-hand thread sawtooth external screw thread in the periphery with described keyed end.
2. releasing tool according to claim 1, is characterized in that, described slips integral body is combined by a plurality of parts that make progress in week, has many baffle plates that extend vertically on the outer peripheral face of described core pipe, and every part of described slips is embedded between two baffle plates.
3. releasing tool according to claim 1, it is characterized in that, on the inner peripheral surface of described connecting cylinder, there is annular ridge, described top cover comprises path section and large footpath section, the external diameter of described path section is less than the external diameter of large footpath section, the internal diameter of described annular ridge is less than the external diameter of described large footpath section and is greater than the external diameter of described path section, described large footpath section with respect to path section near spring one side, described path section offsets through described annular ridge and described slips, and the external diameter of the force side of slips is greater than the internal diameter of annular ridge.
4. releasing tool according to claim 1, is characterized in that, between described female lock ring and described position-limiting drum, by corresponding spacing fin and the limited impression of axial setting, circumferentially locates.
5. releasing tool according to claim 1, it is characterized in that, described sealing device comprises metal ring, on the inner peripheral surface of described metal ring and outer peripheral face, have seal groove, sealing ring is set respectively in described seal groove, on the outer peripheral face of described core pipe, have the 3rd boss, described sealing device is fixed between described the 3rd boss and described guide shoe.
6. releasing tool according to claim 1, is characterized in that, the distance between described the 4th boss and described sealing drum is at least the twice of the axial length of described female lock ring.
7. releasing tool according to claim 1, is characterized in that, described joint and described core pipe are threaded connection, and between described joint and described core pipe, by holding screw, fixes.
8. releasing tool according to claim 1, is characterized in that, between described joint and described core pipe, passes through seal with O ring.
9. releasing tool according to claim 1, is characterized in that, described joint is threaded with described connecting cylinder, between described joint and described connecting cylinder, by holding screw, fixes.
10. releasing tool according to claim 1, is characterized in that, described guide shoe is connected with described core gas thread, and by holding screw, fixes between described guide shoe and described core pipe.
11. releasing tools according to claim 1, is characterized in that, described position-limiting drum is threaded with described sealing drum, and by holding screw, fix between described position-limiting drum and described sealing drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699750.3U CN203515410U (en) | 2013-11-07 | 2013-11-07 | Releasing tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320699750.3U CN203515410U (en) | 2013-11-07 | 2013-11-07 | Releasing tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203515410U true CN203515410U (en) | 2014-04-02 |
Family
ID=50374357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320699750.3U Expired - Lifetime CN203515410U (en) | 2013-11-07 | 2013-11-07 | Releasing tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203515410U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603615A (en) * | 2013-11-07 | 2014-02-26 | 安东石油技术（集团）有限公司 | Releasing tool |
-
2013
- 2013-11-07 CN CN201320699750.3U patent/CN203515410U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603615A (en) * | 2013-11-07 | 2014-02-26 | 安东石油技术（集团）有限公司 | Releasing tool |
| CN103603615B (en) * | 2013-11-07 | 2016-06-08 | 安东石油技术（集团）有限公司 | A kind of releasing tool |
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