CN207728340U - A kind of extruding expanding external casing packer - Google Patents
A kind of extruding expanding external casing packer Download PDFInfo
- Publication number
- CN207728340U CN207728340U CN201820005819.0U CN201820005819U CN207728340U CN 207728340 U CN207728340 U CN 207728340U CN 201820005819 U CN201820005819 U CN 201820005819U CN 207728340 U CN207728340 U CN 207728340U
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- central tube
- cylinder
- rubber layer
- lower tray
- sliding sleeve
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Abstract
The utility model discloses a kind of extruding expanding external casing packer, one end end of its sliding sleeve is surrounded with outer tube, central tube is formed with annular compartment, the hydrophthalmia that annular compartment is equipped with by central tube and unicom inside central tube, lower tray can slide axially along central tube, central tube is equipped with gingival cyst of mucous gland in the newborn button with the periphery that packing element position matches, lower tray inner circumferential is embedded with clamp spring, the cylinder of packing element includes the layer of polyurethane that the rubber layer and cladding positioned inside are set on the outside of rubber layer, and several annular grooves are equipped on the inside of rubber layer.The utility model passes through hydraulic drive sliding sleeve, lower tray is driven to move, lower tray, which squeezes cylinder, makes Kiln body camber, outer diameter increase, to insulate the annular space between casing and wellbore, clamp spring and gingival cyst of mucous gland in the newborn snap fit close retaining, and realization is permanent setting, and cylinder thickness is constant when setting, simultaneously, it is contacted with bore hole inside wall using the higher layer of polyurethane of hardness, cylinder is not easy to burst, and packing effect is reliable.
Description
Technical field
The utility model is related to petroleum works technical fields, and in particular to a kind of extruding expanding external casing packer.
Background technology
Packer refer to elastic packing original paper, and insulate whereby between various sizes tubing string and wellbore and tubing string it
Between annular space, and completely cut off payzone, with the downhole tool of control production fluid injection protection sleeve pipe.
External casing packer is set between casing and wellbore, to insulate the annular space between casing and wellbore.It is common
External casing packer be hydraulic expansion type, operation principle is：Apply certain pressure into casing after well cementing impact pressure,
So that drilling fluid in casing is filled into the packing element of packer by the specific device of packer, packing element is made to expand, it is empty to insulate annular
Between.
Since bore hole inside wall is irregular, packing element after expansion unbalance stress everywhere, and the packing element thickness after expanding is thinned, easily
Cause packer to burst, loses packing effect.
Utility model content
The purpose of this utility model is to provide a kind of extruding expanding external casing packers.
To realize above-mentioned purpose of utility model, the utility model adopts the following technical solution：
A kind of extruding expanding external casing packer, including：
Central tube, outer tube, the sliding sleeve of coaxial arrangement, the outer tube are connect by screw thread with the central tube, the sliding sleeve
It is set between the central tube and the outer tube and is connect with the outer tube by cutting off, one end end of the sliding sleeve and institute
State outer tube, central tube surrounds and is formed with annular compartment, the hydrophthalmia that the annular compartment is equipped with by the central tube with it is described
Unicom inside central tube；
Further include：
Packing element, the packing element include cylinder and top tray and lower tray for fixing the cylinder both ends, the subiculum
Disk can slide axially along central tube, and other end end and the lower tray of the sliding sleeve lean, the top tray with it is described
Central tube is fixedly connected；
Wherein, the central tube is equipped with gingival cyst of mucous gland in the newborn button, the lower tray inner circumferential with the periphery that the packing element position matches
It is embedded with clamp spring；
The cylinder of the packing element includes the polyurethane that the rubber layer and cladding positioned inside are set on the outside of the rubber layer
Layer；Several annular grooves are equipped on the inside of the rubber layer, the width of the annular groove is gradually reduced from the inside to the outside, the layer of polyurethane
Hardness be higher than the rubber layer hardness.
As the further improved technical solution of the utility model, the both ends of the cylinder be respectively installed in it is described it is upper,
In the annular groove of lower tray.
As the further improved technical solution of the utility model, several annular grooves on the inside of the rubber layer are located at described
The axial middle part of cylinder.
Compared with the existing technology, the utility model has technical effect that：
The utility model drives lower tray to move by hydraulic drive sliding sleeve, and lower tray, which squeezes cylinder, makes Kiln body camber, outside
Diameter increases, and to insulate the annular space between casing and wellbore, clamp spring and gingival cyst of mucous gland in the newborn snap fit close retaining, realize permanent setting, seat
Cylinder thickness is constant when envelope, meanwhile, it is contacted with bore hole inside wall using the higher layer of polyurethane of hardness, cylinder is not easy to burst, envelope
It is reliable every effect.
Description of the drawings
Fig. 1 is a kind of half section structural representation squeezing expanding external casing packer in the utility model embodiment
Figure；
Fig. 2 is the partial enlargement structural representation at A in Fig. 1；
Fig. 3 is the partial enlargement structural representation at B in Fig. 1；
Fig. 4 is a kind of use state diagram squeezing expanding external casing packer in the utility model embodiment.
Specific implementation mode
The utility model is described in detail below with reference to specific implementation mode shown in the drawings.But these embodiment party
Formula is not intended to limit the utility model, structure that those skilled in the art are made according to these embodiments, method or
Transformation functionally is all contained in the scope of protection of the utility model.
Refer to Fig. 1 to 4, a kind of extruding expanding external casing packer 100, including：
Central tube 1, outer tube 2, the sliding sleeve 3 of coaxial arrangement, the outer tube 2 is connect by screw thread with the central tube 1, described
Sliding sleeve 3 is set between the central tube 1 and the outer tube 2 and is connect with the outer tube 2 by cutting off 4, and the one of the sliding sleeve 3
End end is surrounded with the outer tube 2, central tube 1 is formed with annular compartment 5, and the annular compartment 5 on the central tube 1 by setting
Some hydrophthalmias 6 and 1 inside unicom of the central tube；
Further include：
Packing element 7, the packing element 7 include cylinder 71 and top tray 72 and lower tray for fixing 71 both ends of the cylinder
73, the lower tray 73 can slide axially along central tube 1, and other end end and the lower tray 73 of the sliding sleeve 3 lean,
The top tray 72 is fixedly connected with the central tube 1；
Wherein, the periphery that the central tube 1 and 7 position of the packing element match is equipped with gingival cyst of mucous gland in the newborn button 8, in the lower tray 73
Circumferentially it is embedded with clamp spring 9；
The cylinder 71 of the packing element 7 includes that the rubber layer 711 and cladding positioned inside are set to 711 outside of the rubber layer
Layer of polyurethane 712；711 inside of the rubber layer is equipped with several annular grooves, and the width of the annular groove gradually subtracts from the inside to the outside
Small, the hardness of the layer of polyurethane 712 is higher than the hardness of the rubber layer 711.
It should be noted that gingival cyst of mucous gland in the newborn button 8 be several with bevelled annular groove, the angle on inclined-plane and 1 axis of central tube
For 30-45 degree, the bottom of the slope has a plane perpendicular to 1 axis of central tube.
Cylinder 71 uses outside for layer of polyurethane 712, and inside is the design of rubber layer 711, utilizes 712 hardness of layer of polyurethane
Higher characteristic can increase the intensity of cylinder 71, be not easy to burst because of unbalance stress.
Since 711 inside of rubber layer is equipped with the annular groove that width successively decreases from the inside to the outside, when lower tray 73 squeezes cylinder 71, cylinder
Body 71 protrudes outward bending naturally, and outer diameter becomes larger.But unlike that hydraulic expansion type packer, 71 outer diameter of cylinder becomes larger same
When, 71 thickness of cylinder is constant, is not easy to burst because of unbalance stress.
Meanwhile the annular groove that 711 inside of rubber layer is arranged makes cylinder 71 be easier flexural deformation, required liquid when setting
Compressive Strength is smaller, and since the diameter inside and outside cylinder 71 is different (internal diameter is less than outer diameter) in setting bending process, rubber layer
The annular groove of 711 insides gradually collapses disappearance (referring to Fig. 4) so that 711 structure of rubber layer is continuous, to ensure 71 thickness of cylinder
Uniformly.
Further, the both ends of the cylinder 71 are respectively installed in the ring of the upper and lower pallet in the present embodiment
In slot.
Further, several annular grooves of 711 inside of the rubber layer are located at the axial middle part of the cylinder 71, so that cylinder
It is located at axial middle part when 71 bending at largest outside diameter.
The utility model is connected in bunch tube when use, when well cementing impact pressure rear sleeve bottom end has blocked, is sprained into casing
Pressure, when pressure rises to certain value, highly pressurised liquid enters through hydrophthalmia 6 in annular compartment 5, acts on sliding sleeve 3 and cuts off
4, sliding sleeve 3 and 73 uplink of lower tray are pushed, because of the presence of 711 interior annular slot of rubber layer, intensity is uneven inside and outside cylinder 71,
It is bent outwardly naturally after compression, outer diameter becomes larger (thickness is constant), fills up annular space, and clamp spring 9 is stuck in the gingival cyst of mucous gland in the newborn button 8 of corresponding position
On, lower tray 73 is unable to downlink and is locked, and packing element 7 is securely in the setting annular space outside casing.
Compared with the existing technology, the utility model has technical effect that：
The utility model drives lower tray to move by hydraulic drive sliding sleeve, and lower tray, which squeezes cylinder, makes Kiln body camber, outside
Diameter increases, and to insulate the annular space between casing and wellbore, clamp spring and gingival cyst of mucous gland in the newborn snap fit close retaining, realize permanent setting, seat
Cylinder thickness is constant when envelope, meanwhile, it is contacted with bore hole inside wall using the higher layer of polyurethane of hardness, cylinder is not easy to burst, envelope
It is reliable every effect.
Finally it should be noted that：Embodiment of above is only to illustrate the technical solution of the utility model, rather than limits it
System；Although the utility model is described in detail with reference to aforementioned embodiments, those skilled in the art should
Understand：It can still modify to the technical solution recorded in aforementioned each embodiment, or special to which part technology
Sign carries out equivalent replacement；And these modifications or replacements, each reality of the utility model that it does not separate the essence of the corresponding technical solution
Apply the spirit and scope of mode technical solution.
Claims (3)
1. a kind of extruding expanding external casing packer, which is characterized in that including：
Central tube, outer tube, the sliding sleeve of coaxial arrangement, the outer tube are connect by screw thread with the central tube, the sliding sleeve setting
Connect with the outer tube between the central tube and the outer tube and by cutting off, one end end of the sliding sleeve with it is described outer
Pipe, central tube surround and are formed with annular compartment, the hydrophthalmia that the annular compartment is equipped with by the central tube and the center
Unicom inside pipe；
Further include：
Packing element, the packing element include cylinder and top tray and lower tray for fixing the cylinder both ends, and the lower tray can
It slides axially along central tube, other end end and the lower tray of the sliding sleeve lean, the top tray and the center
Pipe is fixedly connected；
Wherein, the central tube is equipped with gingival cyst of mucous gland in the newborn button with the periphery that the packing element position matches, and the lower tray inner circumferential is embedded
There is clamp spring；
The cylinder of the packing element includes the layer of polyurethane that the rubber layer and cladding positioned inside are set on the outside of the rubber layer；Institute
State and be equipped with several annular grooves on the inside of rubber layer, the width of the annular groove is gradually reduced from the inside to the outside, the layer of polyurethane it is hard
Hardness of the degree higher than the rubber layer.
2. a kind of extruding expanding external casing packer according to claim 1, which is characterized in that the both ends of the cylinder
It is respectively installed in the annular groove of the upper and lower pallet.
3. a kind of extruding expanding external casing packer according to claim 1, which is characterized in that on the inside of the rubber layer
Several annular grooves be located at the axial middle part of the cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820005819.0U CN207728340U (en) | 2018-01-03 | 2018-01-03 | A kind of extruding expanding external casing packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820005819.0U CN207728340U (en) | 2018-01-03 | 2018-01-03 | A kind of extruding expanding external casing packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207728340U true CN207728340U (en) | 2018-08-14 |
Family
ID=63084896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820005819.0U Active CN207728340U (en) | 2018-01-03 | 2018-01-03 | A kind of extruding expanding external casing packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207728340U (en) |
-
2018
- 2018-01-03 CN CN201820005819.0U patent/CN207728340U/en active Active
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