CN201687429U - Coal mine down-hole drilling hydraulic fracture open hole packer - Google Patents
Coal mine down-hole drilling hydraulic fracture open hole packer Download PDFInfo
- Publication number
- CN201687429U CN201687429U CN2010202138441U CN201020213844U CN201687429U CN 201687429 U CN201687429 U CN 201687429U CN 2010202138441 U CN2010202138441 U CN 2010202138441U CN 201020213844 U CN201020213844 U CN 201020213844U CN 201687429 U CN201687429 U CN 201687429U
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- packing element
- central tube
- shoulder protector
- rubber cylinder
- coal mine
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Abstract
The utility model discloses a coal mine down-hole drilling hydraulic fracture open hole packer including a central pipe. An upper joint and a lower joint are arranged at the top end and the bottom end of the central pipe; a lock nut, a seal connector, a shoulder protector and a rubber cylinder are sleeved from the top down on the outer ring of the central pipe between the upper joint and the lower joint, and another lock nut, another seal connector and another shoulder protector are sequentially arranged at the lower part of the rubber cylinder and form symmetry with the lock nut, the seal connector and the shoulder protector above the rubber cylinder; the diameter of the middle part of the rubber cylinder is greater than those on the upper and the lower sides of the rubber cylinder; the upper-side and the lower-side shoulder protectors are positioned respectively on the outer rings on the upper side and the lower side of the rubber cylinder; the lower end of the upper-side shoulder protector is propped against the upper end of the middle part of the rubber cylinder; and the upper end of the lower-side shoulder protector is propped against the lower end of the middle part of the rubber cylinder. Aiming to the deficiencies of the conventional equipment, the utility model provides the coal mine down-hole drilling hydraulic fracture open hole packer, which has the characteristics of high expansion ratio, compact hole sealing, high pressure resistance, low starting pressure, no spacing and reusability when used for hydraulic fracture and hydraulic extrusion during coal hole and rock hole drilling and the like.
Description
Technical field
The utility model relates to a kind of coal mine down-hole drilling hydraulic fracturing open hole packer.
Background technology
Along with the dynamics of fire damp improvement and ground cbm development is further strengthened, at hypotonic, the soft characteristics of the most of coal body of China, the waterpower measure is progressively by approval and extensive use.Characteristics such as that down-hole drilling hydraulic fracturing has is simple to operate, equipment is small-sized, the pressure break control range is big, extraction is effective.As the requisite sealing of hole equipment of fracturing, the quality of packer is directly connected to the quality of fracturing effect.
The selected sealing material of waterpower measure at present (hydraulic slotted liner technique, waterpower are extruded, fracturing) mostly is capsule or chemical sealing material.Capsule has strong, the light characteristics such as easy-to-use of plasticity, but its anti-pressure ability less (less than 20Mpa) can not be repeatedly used, and is difficult to satisfy the requirement that Hydraulic fracturing pressure is big, discharge capacity is big.Chemistry sealing material (polyurethane, horse beautiful loose, Luo Kexiu) waits and must be equipped with when carrying out sealing of hole that special-purpose hole-sealing pump, operation are comparatively complicated, the workman consumes one's strength seriously, shortcomings such as compressive strength is little, cost height, so does not also promote the use of on a large scale.
The utility model content
The purpose of this utility model provides a kind of not enough and a kind of coal mine down-hole drilling hydraulic fracturing open hole packer is provided at existing equipment, be to coal hole, petrosal foramen fracturing, waterpower extrude etc. that boring has that expansion rate height, tight, the anti-high pressure of sealing of hole, starting pressure are low, infinite place, reusable characteristics.
For achieving the above object, the utility model adopts following technical scheme: a kind of coal mine down-hole drilling hydraulic fracturing open hole packer, comprise central tube, central tube top and bottom are respectively equipped with, lower contact, last, central tube outer ring between the lower contact is arranged with lock nut from top to bottom successively, head is tightly connected, shoulder protector and packing element, described lock nut, be tightly connected the head and shoulder protector be symmetricly set in the packing element both sides successively about packing element, the diameter of described packing element mid portion is greater than on the packing element, following both sides diameter, on, the downside shoulder protector lays respectively on the packing element, the outer ring of following both sides, and the upper end of the lower end of upside shoulder protector and packing element mid portion offsets, and the lower end of the upper end of downside shoulder protector and packing element mid portion offsets.
The central tube outer ring is arranged with adapter sleeve; Be tightly connected the head a side and adjacent packing element end and central tube between be provided with the gap, adapter sleeve is positioned at described gap, adapter sleeve inner lane one side contacts with the central tube outer wall, and opposite side is connected with described packing element end thread, and the adapter sleeve outer ring is connected with the head thread that is tightly connected.
Described upper and lower joint and lock nut are threaded with central tube respectively.
Between upper and lower joint and the central tube, between lock nut and the joint, be tightly connected between head and the central tube, being tightly connected is equipped with sealing ring between head and the adapter sleeve.
The beneficial effects of the utility model are: because water under high pressure passes through in the open hole packer central tube, interior siphunculus caliber difference produces chock pressure difference in the caliber changing unit, and when chock pressure difference during greater than 2Mpa, the packing element expansion realizes the annular space sealing.Simultaneously, because the expansion of packing element, lock nut promotes shoulder protector and is moved, and has played the purpose of protection packing element.The utility model be to coal hole, petrosal foramen fracturing, waterpower extrude etc. that boring has that expansion rate height, tight, the anti-high pressure of sealing of hole, starting pressure are low, infinite place, reusable characteristics.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
By a kind of coal mine down-hole drilling hydraulic fracturing open hole packer shown in Figure 1, a kind of coal mine down-hole drilling hydraulic fracturing open hole packer, comprise central tube 7, central tube 7 tops and bottom are respectively equipped with, lower contact 1,9, last, lower contact 1, central tube 7 outer rings between 9 are arranged with lock nut 3 from top to bottom successively, be tightly connected 4, shoulder protector 6 and packing element 8, described lock nut 3, be tightly connected 4 and shoulder protector 6 be symmetricly set in packing element 8 both sides successively about packing element 8, the diameter of described packing element 8 mid portions is greater than on the packing element 8, following both sides diameter, on, downside shoulder protector 6 lays respectively on the packing element 8, the outer ring of following both sides, and the upper end of the lower end of upside shoulder protector 6 and packing element 8 mid portions offsets, and the lower end of the upper end of downside shoulder protector 6 and packing element 8 mid portions offsets.Central tube 7 outer rings are arranged with adapter sleeve 5; Be provided with the gap between 4 the side of being tightly connected and adjacent packing element 8 ends and the central tube 7, adapter sleeve 5 is positioned at described gap, adapter sleeve 5 inner lanes one side contacts with central tube 7 outer walls, and opposite side is connected with described packing element 8 end thread, and adapter sleeve 5 outer rings 4 are threaded with being tightly connected.Described upper and lower joint 1,9 and lock nut 3 are threaded with central tube 7 respectively.Between upper and lower joint 1,9 and the central tube 7, between lock nut 3 and the joint, be tightly connected 4 and central tube 7 between, be tightly connected 4 and adapter sleeve 5 between be equipped with sealing ring 2.
Because water under high pressure passes through in open hole packer central tube 7, interior siphunculus caliber difference produces chock pressure difference in the caliber changing unit, and when chock pressure difference during greater than 2Mpa, packing element 8 expansions realize the annular space sealing.Simultaneously, because the expansion of packing element 8, lock nut 3 promotes shoulder protector 6 and is moved, and has played the purpose of protection packing element 8.The utility model be to coal hole, petrosal foramen fracturing, waterpower extrude etc. that boring has that expansion rate height, tight, the anti-high pressure of sealing of hole, starting pressure are low, infinite place, reusable characteristics.
Claims (4)
1. coal mine down-hole drilling hydraulic fracturing open hole packer, comprise central tube, central tube top and bottom are respectively equipped with, lower contact, it is characterized in that: last, central tube outer ring between the lower contact is arranged with lock nut from top to bottom successively, head is tightly connected, shoulder protector and packing element, described lock nut, be tightly connected the head and shoulder protector be symmetricly set in the packing element both sides successively about packing element, the diameter of described packing element mid portion is greater than on the packing element, following both sides diameter, on, the downside shoulder protector lays respectively on the packing element, the outer ring of following both sides, and the upper end of the lower end of upside shoulder protector and packing element mid portion offsets, and the lower end of the upper end of downside shoulder protector and packing element mid portion offsets.
2. a kind of coal mine down-hole drilling hydraulic fracturing open hole packer as claimed in claim 1, it is characterized in that: the central tube outer ring is arranged with adapter sleeve; Be tightly connected the head a side and adjacent packing element end and central tube between be provided with the gap, adapter sleeve is positioned at described gap, adapter sleeve inner lane one side contacts with the central tube outer wall, and opposite side is connected with described packing element end thread, and the adapter sleeve outer ring is connected with the head thread that is tightly connected.
3. a kind of coal mine down-hole drilling hydraulic fracturing open hole packer as claimed in claim 1 or 2 is characterized in that: described upper and lower joint and lock nut are threaded with central tube respectively.
4. a kind of coal mine down-hole drilling hydraulic fracturing open hole packer as claimed in claim 3, it is characterized in that: between upper and lower joint and the central tube, between lock nut and the joint, be tightly connected between head and the central tube, being tightly connected is equipped with sealing ring between head and the adapter sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138441U CN201687429U (en) | 2010-06-03 | 2010-06-03 | Coal mine down-hole drilling hydraulic fracture open hole packer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202138441U CN201687429U (en) | 2010-06-03 | 2010-06-03 | Coal mine down-hole drilling hydraulic fracture open hole packer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201687429U true CN201687429U (en) | 2010-12-29 |
Family
ID=43375713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202138441U Expired - Fee Related CN201687429U (en) | 2010-06-03 | 2010-06-03 | Coal mine down-hole drilling hydraulic fracture open hole packer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201687429U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2010
- 2010-06-03 CN CN2010202138441U patent/CN201687429U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20180603 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |