CN211058763U - Special packer - Google Patents
Special packer Download PDFInfo
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- CN211058763U CN211058763U CN201922172003.4U CN201922172003U CN211058763U CN 211058763 U CN211058763 U CN 211058763U CN 201922172003 U CN201922172003 U CN 201922172003U CN 211058763 U CN211058763 U CN 211058763U
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Abstract
The utility model relates to an oil gas field development well completion measure operation technical field is a special packer, including top connection, center tube, packing element, floating head and lower clutch, top connection lower extreme inboard and center tube upper end outside fixed mounting are in the same place, and the center tube lower extreme outside is in the same place with lower clutch upper end outside fixed mounting. The utility model has the advantages of reasonable and compact structure, high durability and convenient use, through setting up the head that floats, be convenient for installation and fixed packing element, through setting up effect chamber and feed liquor hole, can make the intraductal high-pressure fluid of center act on packing element, when intraductal fluidic pressure of center is greater than the intraductal fluid pressure of well casing, support tightly at the well casing inner wall after packing element inflation, realize the seat and seal, can increase the deflection of packing element through the effect chamber, can seat the well pipe wall that the clearance between the packing element outside and well pipe wall is between 10mm to 12mm, after the packing element, can take out smoothly through the clearance between packing element and the well casing inner wall.
Description
Technical Field
The utility model relates to an oil gas field development well completion measure operation technical field is a special packer.
Background
The Suliger gas field belongs to a heterogeneous and extremely strong compact lithologic gas field, has the characteristics of compact reservoir, multiple layer systems, low porosity and low permeability, almost has no natural productivity, each well can be put into operation after fracturing modification, and hydraulic fracturing becomes an effective measure for putting into operation of the gas field. The conventional string adopted by the separate-layer fracturing is mainly a conventional K344 packer, and is matched with a fracturing sliding sleeve, a safety joint and a hydraulic anchor to form a process string. The clearance between the outer side of the packer and the wall of the well pipe is small (2 mm-4 mm), and after fracturing, the problem that the packer swells at high temperature or the hydraulic anchor fluke does not retract causes the problem that the pipe lifting column is blocked, so that the tool cannot be lifted; the requirement of changing the small pipe column after the special packer is suitable for the work area pressure is researched, the number of accident wells is reduced, and a foundation is laid for later-stage operation.
Disclosure of Invention
The utility model provides a special packer has overcome above-mentioned prior art not enough, and it can effectively solve the problem that the tubular column meets the card, and the instrument can't be proposed after current oil gas well fracturing.
The technical scheme of the utility model is realized through following measure: a special packer comprises an upper joint, a central pipe, a packing rubber cylinder, a floating head and a lower joint, wherein the inner side of the lower end of the upper joint is fixedly installed together with the outer side of the upper end of the central pipe, the outer side of the lower end of the central pipe is fixedly installed together with the outer side of the upper end of the lower joint, the floating head is fixedly installed on the outer side of the lower part of the central pipe corresponding to the position above the lower joint, the packing rubber cylinder sleeved on the outer side of the central pipe is fixedly installed on the outer side of the upper end of the packing rubber cylinder, the inner side of the upper end of the packing rubber cylinder is fixedly installed together with the outer side of the lower end of the upper joint, an action cavity is formed between the outer side of the central pipe corresponding to the position between the lower end.
The following are further optimization or/and improvement of the technical scheme of the utility model:
the packing rubber cylinder comprises an upper rubber cylinder joint, a lower rubber cylinder joint, an inner rubber cylinder, an outer rubber cylinder and a steel belt framework, wherein the outer side of the lower end of the upper joint is fixedly installed with the inner side of the upper end of the cylindrical upper rubber cylinder joint, the outer side of the upper end of the floating head is fixedly provided with the cylindrical lower rubber cylinder joint, a gap is arranged between the upper end of the lower rubber cylinder joint and the lower end of the upper rubber cylinder joint, the inner rubber cylinder sleeved outside the central tube is fixedly installed on the inner side of the middle part of the upper rubber cylinder joint corresponding to the lower position of the upper joint, the outer side of the lower end of the inner rubber cylinder is fixedly installed with the inner side of the middle part of the lower rubber cylinder joint together corresponding to the lower position, the outer side of the inner rubber cylinder is provided with an annular groove, the steel belt framework is fixedly installed in the annular groove, the outer side of the upper end of the steel belt framework is fixedly installed with the, The lower rubber cylinder joint, the inner rubber cylinder and the upper rubber cylinder joint can enclose an action cavity, and the outer rubber cylinder is fixedly installed on the outer side of the middle of the steel belt framework corresponding to the position between the upper rubber cylinder joint and the lower rubber cylinder joint.
An interval can be arranged between the upper end of the outer rubber cylinder and the lower end of the upper rubber cylinder joint, and an interval is arranged between the lower end of the outer rubber cylinder and the upper end of the lower rubber cylinder joint.
The lower end surface of the upper rubber cylinder joint can be a conical surface with a small upper part and a large lower part, and the upper end surface of the lower rubber cylinder joint is a conical surface with a large upper part and a small lower part.
The outer side of the middle part of the upper joint can be provided with an upper step which is contacted with the upper end of the upper rubber barrel joint.
The outer side of the lower end of the floating head can be provided with a lower step which is contacted with the lower end of the lower rubber cylinder joint.
The sealing device can also comprise sealing rings, at least two sealing rings are arranged between the inner side of the upper end of the upper rubber cylinder joint and the outer side of the lower part of the upper joint at intervals up and down, at least two sealing rings are arranged between the inner side of the lower end of the lower rubber cylinder joint and the outer side of the upper part of the floating head at intervals up and down, and at least two sealing rings are arranged between the inner side of the lower end of the floating head and the outer side of the.
The utility model has the advantages of reasonable and compact structure, high durability and convenient use, through setting up the head that floats, be convenient for installation and fixed packing element, through setting up effect chamber and feed liquor hole, can make the intraductal high-pressure fluid of center act on packing element, when intraductal fluidic pressure of center is greater than the intraductal fluid pressure of well casing, support tightly at the well casing inner wall after packing element inflation, realize the seat and seal, can increase the deflection of packing element through the effect chamber, can seat the well pipe wall that the clearance between the packing element outside and well pipe wall is between 10mm to 12mm, after the packing element, can take out smoothly through the clearance between packing element and the well casing inner wall.
Drawings
Fig. 1 is a schematic sectional view of the preferred embodiment of the present invention.
The codes in the figures are respectively: the device comprises a base, a central pipe, a floating joint, an upper joint, a lower joint, an upper rubber cylinder joint, a lower rubber cylinder joint, an inner rubber cylinder, an outer rubber cylinder, a steel belt framework, an upper step, a lower step, a liquid inlet hole, a sealing ring and an action cavity, wherein the base is 1, the central pipe is 2, the floating joint is 3, the lower joint is 4, the upper rubber cylinder joint is 5, the lower rubber cylinder joint is 6, the inner rubber cylinder is 7, the outer rubber cylinder is.
Detailed Description
The utility model discloses do not receive the restriction of following embodiment, can be according to the utility model discloses a technical scheme and actual conditions determine concrete implementation.
In the present invention, for convenience of description, the description of the relative position relationship of the components is described according to the layout mode of the attached drawing 1 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention will be further described with reference to the following examples and drawings:
as shown in the attached figure 1, the special packer comprises an upper joint 1, a central pipe 2, packing rubber cylinders, a floating head 3 and a lower joint 4, wherein the inner side of the lower end of the upper joint 1 is fixedly installed together with the outer side of the upper end of the central pipe 2, the outer side of the lower end of the central pipe 2 is fixedly installed together with the outer side of the upper end of the lower joint 4, the outer side of the lower part of the central pipe 2 corresponding to the position above the lower joint 4 is fixedly installed with the floating head 3, the packing rubber cylinders sleeved on the outer side of the central pipe 2 are fixedly installed on the outer side of the upper end of the floating head 3, the inner side of the upper end of the packing rubber cylinders is fixedly installed together with the outer side of the lower end of the upper joint 1, an action cavity 14 is formed between the outer side of the central pipe 2 corresponding to the position between the lower end of the upper.
The upper joint 1, the central tube 2, the floating joint 3 and the lower joint 4 are all coaxially arranged according to the prior art. In the use, through setting up floating head 3, be convenient for installation and fixed packing rubber barrel, through setting up action chamber 14 and feed liquor hole 12, can make the high-pressure fluid in the center tube 2 to packing rubber barrel effect, when the fluidic pressure in center tube 2 is greater than the fluidic pressure in the well casing, packing rubber barrel supports tightly at the well casing inner wall after the inflation, realize the seat and seal, can increase the deflection of packing rubber barrel through acting chamber 14, can seat the well casing wall that the clearance between packing rubber barrel outside and well casing wall is between 10mm to 12mm, after the while unseals, can take out smoothly through the clearance between packing rubber barrel and the well casing inner wall the utility model discloses, through setting up top connection 1 and lower joint 4, be convenient for with the utility model discloses together with downhole tool mounting, easy operation.
The special packer can be further optimized or/and improved according to actual needs:
as shown in figure 1, the packing rubber cylinder comprises an upper rubber cylinder joint 5, a lower rubber cylinder joint 6, an inner rubber cylinder 7, an outer rubber cylinder 5 and a steel belt framework 9, the outer side of the lower end of the upper joint 1 is fixedly installed with the inner side of the upper end of the upper rubber cylinder joint 5 in a cylindrical shape, the outer side of the upper end of a floating head 3 is fixedly provided with the lower rubber cylinder joint 6 in a cylindrical shape, a gap is arranged between the upper end of the lower rubber cylinder joint 6 and the lower end of the upper rubber cylinder joint 5, the inner side of the middle part of the upper rubber cylinder joint 5 corresponding to the lower position of the upper joint 1 is fixedly provided with the inner rubber cylinder 7 sleeved on the outer side of a central tube 2, the outer side of the lower end of the inner rubber cylinder 7 is fixedly installed with the inner side of the middle part of the lower rubber cylinder joint 6, the outer side of the inner rubber cylinder 7 is provided with an annular groove, the steel belt framework 9 is fixedly installed in the annular groove, the outer side of the upper end of, the upper joint 1, the central pipe 2, the floating head 3, the lower rubber sleeve joint 6, the inner rubber sleeve 7 and the upper rubber sleeve joint 5 can enclose an action cavity 14, and the outer rubber sleeve 5 is fixedly installed on the outer side of the middle of the steel belt framework 9 corresponding to the position between the upper rubber sleeve joint 5 and the lower rubber sleeve joint 6.
According to the requirement, the outer diameters of the upper rubber cylinder joint 5, the lower rubber cylinder joint 6 and the outer rubber cylinder 5 are all 99 mm. In the use, be equipped with the interval through being equipped with between 6 upper ends of lower packing element joint and the 5 lower extremes of upper packing element joint, can increase the deflection of steel band skeleton 9 and interior packing element 7, make 5 outer walls of outer packing element can be sealed between the wall of a well completely, increase the length of sealed section, it is reliable to sit to seal, and the deblocking is simple.
As shown in figure 1, a gap is arranged between the upper end of the outer rubber cylinder 5 and the lower end of the upper rubber cylinder joint 5, and a gap is arranged between the lower end of the outer rubber cylinder 5 and the upper end of the lower rubber cylinder joint 6.
In the use, through such setting, can make 9 upper portions of steel band skeleton and the outside and the lower part outside expose, the internal packing element 7 of high-pressure fluid in the effect chamber 14 is acted on the back, make 9 outer walls of steel band skeleton and well casing inner wall support tightly after internal packing element 7 and the expansion of steel band skeleton 9, can play the effect of hydraulic anchor, prevent instrument drunkenness from top to bottom, realize the anchoring, treat to seal and separate packing element unseal the back (the fluid pressure in the center tube 2 reduces), internal packing element 7 recovers under the effect of steel band skeleton 9 with outer packing element 5, can make the utility model discloses used repeatedly reduces the utility model discloses a use cost.
As shown in fig. 1, the lower end surface of the upper rubber cylinder joint 5 is a conical surface with a small top and a large bottom, and the upper end surface of the lower rubber cylinder joint 6 is a conical surface with a large top and a small bottom.
In the use, when the high-pressure fluid in the effect chamber 14 acted on interior packing element 7, interior packing element 7 outwards expanded with the packing steel band, through setting up the conical surface, can increase the area of contact between packing steel band inflation back and last packing element joint 5 and lower packing element joint 6, avoided packing steel band and last packing element joint 5 and lower packing element joint 6 between lead to stress increase because of area of contact is little, finally made steel band skeleton 9 early inefficacy, through such setting, can improve the utility model discloses a life.
As shown in figure 1, the outer side of the middle part of the upper joint 1 is provided with an upper step 10, and the upper step 10 is contacted with the upper end of the upper rubber cylinder joint 5.
In the use, when the high-pressure fluid in the effect chamber 14 set up the wall of a well, steel band skeleton 9 inflation back upper portion can upwards be glued joint 5 lower terminal surface and apply an ascending power, through setting up the step 10, can weaken the axial force of the 1 lower extreme outside of top connection and the inboard junction in 5 upper ends of last gluing joint, can increase the utility model discloses a reliability improves the bearing strength.
As shown in fig. 1, the lower end of the floating head 3 is provided with a lower step 11 on the outer side, and the lower step 11 is contacted with the lower end of the lower rubber cylinder joint 6.
In the use, when the high-pressure fluid in the effect chamber 14 set up the wall of a well, steel band skeleton 9 inflation back lower part can apply a decurrent power to the packing element connects 6 up ends downwards, through setting up down step 11, can weaken the axial force of the first 3 upper ends outsides of floating and the inboard junction of lower packing element connects 6 lower extreme down, can increase the utility model discloses a reliability improves the bearing strength of the utility model.
As shown in the attached figure 1, the floating joint further comprises a sealing ring 13, at least two sealing rings 13 are arranged between the inner side of the upper end of the upper rubber cylinder joint 5 and the outer side of the lower part of the upper joint 1 at intervals up and down, at least two sealing rings 13 are arranged between the inner side of the lower end of the lower rubber cylinder joint 6 and the outer side of the upper part of the floating head 3 at intervals up and down, and at least two sealing rings 13 are arranged between the inner side of the lower end of the floating head 3 and the.
In the use, through such setting, can increase the sealing performance who acts on 14 chambeies, can contract fast after making interior packing element 7 and the expansion back pressure release of steel band skeleton 9, make the utility model discloses realize setting and deblocking easily, easy operation is reliable.
Above technical feature constitutes the utility model discloses a best embodiment, it has stronger adaptability and best implementation effect, can increase and decrease unnecessary technical feature according to actual need, satisfies the demand of different situation.
Claims (10)
1. A special packer is characterized by comprising an upper joint, a central pipe, a packing rubber cylinder, a floating head and a lower joint, wherein the inner side of the lower end of the upper joint is fixedly installed together with the outer side of the upper end of the central pipe, the outer side of the lower end of the central pipe is fixedly installed together with the outer side of the upper end of the lower joint, the floating head is fixedly installed on the outer side of the lower part of the central pipe corresponding to the position above the lower joint, the packing rubber cylinder sleeved on the outer side of the central pipe is fixedly installed on the outer side of the upper end of the floating head, the inner side of the upper end of the packing rubber cylinder is fixedly installed together with the outer side of the lower end of the upper joint, an action cavity is formed between the outer side of the central pipe corresponding to the position between the lower end of.
2. The special packer of claim 1, wherein the packing rubber cylinder comprises an upper rubber cylinder joint, a lower rubber cylinder joint, an inner rubber cylinder, an outer rubber cylinder and a steel band frame, the outer side of the lower end of the upper joint is fixedly connected with the inner side of the upper end of the upper cylindrical rubber cylinder joint, the outer side of the upper end of the floating head is fixedly connected with the lower cylindrical rubber cylinder joint, a gap is arranged between the upper end of the lower rubber cylinder joint and the lower end of the upper rubber cylinder joint, the inner rubber cylinder sleeved on the outer side of the central tube is fixedly arranged on the inner side of the middle part of the upper rubber cylinder joint corresponding to the lower position of the upper joint, the outer side of the lower end of the inner rubber cylinder is fixedly connected with the inner side of the middle part of the lower rubber cylinder joint, an annular groove is arranged on the outer side of the inner rubber cylinder, the steel band frame is fixedly arranged in the annular groove, the outer side of the upper end of the steel band frame is fixedly, the upper joint, the central pipe, the floating head, the lower rubber sleeve joint, the inner rubber sleeve and the upper rubber sleeve joint can enclose an action cavity, and the outer rubber sleeve is fixedly installed on the outer side of the middle of the steel belt framework corresponding to the position between the upper rubber sleeve joint and the lower rubber sleeve joint.
3. The special packer of claim 2, wherein a space is provided between an upper end of the outer packer element and a lower end of the upper packer element joint, and a space is provided between the lower end of the outer packer element and an upper end of the lower packer element joint.
4. The special packer of claim 3, wherein the lower end surface of the upper rubber barrel joint is a conical surface with a small top and a large bottom, and the upper end surface of the lower rubber barrel joint is a conical surface with a large top and a small bottom.
5. The special packer as claimed in claim 2, 3 or 4, wherein the upper joint has an upper step outside the middle part, and the upper step is in contact with the upper end of the upper joint of the upper rubber tube.
6. A special packer as claimed in claim 2 or 3 or 4, where the floating head has a lower step on the outside of its lower end, the lower step being in contact with the lower end of the lower rubber nipple.
7. The special packer as claimed in claim 5, wherein the floating head has a lower step outside the lower end thereof, the lower step being in contact with the lower end of the lower rubber cylinder joint.
8. The special packer as claimed in claim 2, 3, 4 or 7, further comprising a sealing ring, wherein at least two sealing rings are provided at an interval from top to bottom between the inner side of the upper end of the upper joint of the upper rubber tube and the outer side of the lower portion of the upper joint, at least two sealing rings are provided at an interval from top to bottom between the inner side of the lower end of the lower joint of the lower rubber tube and the outer side of the upper portion of the floating head, and at least two sealing rings are provided at an interval from top to bottom between the inner side of.
9. The special packer as claimed in claim 5, further comprising a seal ring, at least two seal rings are provided at an interval from top to bottom between the inside of the upper end of the upper joint and the outside of the lower portion of the upper joint, at least two seal rings are provided at an interval from top to bottom between the inside of the lower end of the lower joint and the outside of the upper portion of the floating head, and at least two seal rings are provided at an interval from top to bottom between the inside of the lower end of the floating head and the outside of the lower portion of the.
10. The special packer as claimed in claim 6, further comprising a seal ring, at least two seal rings are provided at intervals up and down between the inner side of the upper end of the upper joint and the outer side of the lower portion of the upper joint, at least two seal rings are provided at intervals up and down between the inner side of the lower end of the lower joint and the outer side of the upper portion of the floating head, and at least two seal rings are provided at intervals up and down between the inner side of the lower end of the floating head and the outer side of the lower portion of the.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922172003.4U CN211058763U (en) | 2019-12-06 | 2019-12-06 | Special packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922172003.4U CN211058763U (en) | 2019-12-06 | 2019-12-06 | Special packer |
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| Publication Number | Publication Date |
|---|---|
| CN211058763U true CN211058763U (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922172003.4U Active CN211058763U (en) | 2019-12-06 | 2019-12-06 | Special packer |
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| CN (1) | CN211058763U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627763A (en) * | 2020-12-11 | 2021-04-09 | 中国石油集团渤海钻探工程有限公司 | Floating expansion type packer |
| CN112682019A (en) * | 2020-12-28 | 2021-04-20 | 中国石油集团渤海钻探工程有限公司 | Expanding type layered fracturing packer with anchoring function |
| CN113756775A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Hydraulic permeability increasing process for large-dip-angle low-permeability coal seam |
-
2019
- 2019-12-06 CN CN201922172003.4U patent/CN211058763U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627763A (en) * | 2020-12-11 | 2021-04-09 | 中国石油集团渤海钻探工程有限公司 | Floating expansion type packer |
| CN112682019A (en) * | 2020-12-28 | 2021-04-20 | 中国石油集团渤海钻探工程有限公司 | Expanding type layered fracturing packer with anchoring function |
| CN113756775A (en) * | 2021-09-27 | 2021-12-07 | 中煤科工集团重庆研究院有限公司 | Hydraulic permeability increasing process for large-dip-angle low-permeability coal seam |
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