CN103184848B - Hydraulic base sealed permanent type open hole packer and barefoot completion packing method - Google Patents
Hydraulic base sealed permanent type open hole packer and barefoot completion packing method Download PDFInfo
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- CN103184848B CN103184848B CN201110450022.4A CN201110450022A CN103184848B CN 103184848 B CN103184848 B CN 103184848B CN 201110450022 A CN201110450022 A CN 201110450022A CN 103184848 B CN103184848 B CN 103184848B
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Abstract
The invention discloses a kind of hydraulic base sealed permanent type open hole packer and barefoot completion packing method, wherein packer comprises the mandrel with axially extending bore, one end of mandrel connects the first joint, the other end connects the second joint, mandrel is socketed a left side successively from the first joint and pushes away slips, the first expansion of metal bowl, the first auxiliary packing element pressure ring, the first auxiliary packing element, the first spacer ring, main packing element, the second spacer ring, the second auxiliary packing element pressure ring, the second auxiliary packing element, the second expansion of metal bowl, shearing ring, piston and locating snap ring; Mandrel has and pushes away the first pressure transmission hole corresponding to slips and the first slips with a left side; Support ring is provided with between main packing element and mandrel; The outside cover of piston has urceolus, and one end of urceolus is connected with the second joint, and the other end is connected with shearing ring, and mandrel is provided with second slips corresponding with piston; Mandrel also has the second pressure transmission hole, and the second pressure transmission hole is between locating snap ring and piston.Packer packing of the present invention is every fast, lastingly.
Description
Technical field
The present invention relates to oil field straight well or open hole completion of horizontal well segmentation renovation technique field, specifically a kind of hydraulic base sealed permanent type open hole packer and barefoot completion packing method.
Background technology
In oilfield process, the segmentation renovation technique of straight well or horizontal well is Efficient Development low permeability reservoirs, effective well stimulation that the unconventionaloil pool such as Oil in Super-low Permeability, special hypotonic, shale gas reservoir are hidden.Due to straight well multilayer system or horizontal well individual layer system but the reason such as horizontal segment length, non-homogeneity be strong, carry out disposable general acidifying or pressure break specific aim strong, often can not reach the object of transformation.And adopt open hole packer to carry out sectional well completion and transformation, modification measures targetedly can be taked to each payzone, or increase acid strength or increase sand fracturing scale, thus really realize each payzone Duan Jun and reach efficient solution except nearly well blocking, the object linking up reservoir.Open hole packer is one of instrument in barefoot completion segmentation reforming technology, serves the key operation of packing bore hole Reservoir Section, obtains extensive application.In straight well or open hole completion of horizontal well segmentation storey increase design process, according to geology transformation requirement, enter sectional well completion tubing string string under needs and bore hole Reservoir Section is divided into some sections, open hole packer is entered under the relevant position of completion tubular column string, under the correspondence position needing transformation, enter sliding sleeve (fluid enters reservoir by sliding sleeve) simultaneously, when completion tubular column string is after design attitude, packer carries out packing, can realize staged fracturing or acid stimulation operation.
In straight well or open hole completion of horizontal well segmentation storey increase design process, according to geology transformation requirement, enter sectional well completion tubing string string under needs and bore hole Reservoir Section is divided into some sections, open hole packer is entered under the relevant position of completion tubular column string, under the correspondence position needing transformation, enter sliding sleeve (fluid enters reservoir by sliding sleeve) simultaneously, when completion tubular column string is after design attitude, build the pressure base sealed packer, and pitching is opened sliding sleeve and can be realized staged fracturing or acid stimulation operation successively.But existing packer all has deficiency.Wherein, inflatable packer: its sealing is restricted because of relevant with packing element inside and outside differential pressure, general pressure-bearing difference ability is lower.Meet liquid swell packers: the first, because of its packing element meet liquid after automatic slowly expand, if under enter process and to have etc. and stop operation, produce midway and meet the risk that liquid expands; The second, how many sealing and downhole fluid type, fluids have relation, when instrument needs to give after entering well chien shih its fully expand, therefore long construction period.
In view of above-mentioned existing packer all has weak point, the present inventor is actively studied and is innovated, to found a kind of novel hydraulic base sealed permanent type open hole packer and barefoot completion packing method, it is made to have more practicality in barefoot completion segmentation renovation technique field.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of hydraulic base sealed permanent type open hole packer, packer of the present invention has the advantages that sealing is quick, Sealing period is of a specified duration.
In order to solve the problems of the technologies described above, present invention employs following technical scheme:
Hydraulic base sealed permanent type open hole packer, comprise the mandrel with axially extending bore, one end of mandrel connects the first joint, the other end connects the second joint, mandrel is socketed a left side successively from the first joint to the second joint and pushes away slips, the first expansion of metal bowl, the first auxiliary packing element pressure ring, the first auxiliary packing element, the first spacer ring, main packing element, the second spacer ring, the second auxiliary packing element pressure ring, the second auxiliary packing element, the second expansion of metal bowl, shearing ring, piston and locating snap ring; Wherein a left side pushes away one end of slips between the first joint and mandrel, and be slidably connected with the first joint and stem seal, a left side is pushed away slips and is connected by the first shear pin with the first joint, a left side pushes away slips and the first joint and mandrel and jointly forms the first pressure transmission room, mandrel has the first pressure transmission hole of connection first pressure transmission room and mandrel inside; The inner surface that a left side pushes away slips has dentation slip insert, and mandrel is provided with and stops a left side to push away first slips with slips tooth of slips to the first joint direction movement; Be provided with support ring between main packing element and mandrel, support ring is positioned at the middle part of main packing element; In the outside of piston, cover has urceolus, one end of urceolus is connected with the second joint sealing, the other end of urceolus is connected by the second shear pin with shearing ring, piston is connected with slipper seal between mandrel and urceolus, the inwall of piston has dentation slip insert, mandrel is provided with second slips with slips tooth stoping piston to the second joint direction movement; Described mandrel also has the second pressure transmission hole, described second pressure transmission hole between locating snap ring and piston, described locating snap ring and urceolus and mandrel axial restraint.
Further, a described left side pushes away between slips and the first joint, and a left side pushes away and is respectively arranged with the first O-ring seals between slips and mandrel and seals.
Further, be provided with the second O-ring seals between described piston and urceolus and mandrel to seal.
Further, seal by arranging the 3rd O-ring seals between described urceolus and the second joint.
Further, described mandrel with between the first joint and the second joint for being threaded.
Another object of the present invention is for providing a kind of barefoot completion packing method using above-mentioned packer, and the inventive method packing is quick, and packing is of long duration.
The technical scheme realizing above-mentioned purpose is as follows:
Use the barefoot completion packing method of above-mentioned packer, comprise the steps:
A. by above-mentioned packer access completion tubular column, the second joint of wherein said packer passes through the shaft isolation valve of oil pipe connecting band ball seat, and the first joint is connected with oil pipe or drilling rod;
B. described packer is delivered to downhole designs position, drop into setting ball on the ball seat of shaft isolation valve by drilling rod or oil pipe;
C. suppress from oil pipe or drilling rod, pressure is delivered to a left side respectively by the first pressure transmission hole on mandrel and the second pressure transmission hole and pushes away on slips and piston, after pressure reaches shear force, first shear pin and the second shear pin are cut off respectively, a left side pushes away slips and piston moves to the middle part of mandrel under effect respectively vertically at pressure, final pressure is passed to the both sides of main packing element, makes main packing element by compression swelling, finally forms seal pack;
D. simultaneously, a left side pushes away slips and is mutually engaged with the first slips, stops a left side to push away slips and moves to the first joint direction, piston and the second slips engaged, prevention piston moves to the second joint direction, thus stops main packing element resilience, forms lasting packing.
Compared with prior art, beneficial effect of the present invention is:
Hydraulic base sealed permanent type open hole packer of the present invention transmits hydraulic pressure by the first pressure transmission hole and the second pressure transmission hole, and then the left side of pushing set on mandrel pushes away slips and piston is cut off respective shear pin and moves to middle part, the mechanical presses power of generation finally makes the packing element Expansion sealing bore hole Reservoir Section being positioned at middle part.Meanwhile, the dentalation with slip insert of design make setting after main packing element not deblocking, bearing capacity is high; Setting procedure completes instantaneously, saves the operating time.Smart structural design, reliable, to horizontal well or the effective packing of straight well bore hole Reservoir Section, the operation of each payzone section security implementation can be ensured through overtesting.
Accompanying drawing explanation
Fig. 1 is that the structure of the hydraulic base sealed permanent type open hole packer of invention partly cuts open figure.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Embodiment 1:
Fig. 1 is that the structure of the hydraulic base sealed permanent type open hole packer of invention partly cuts open figure.As shown in Figure 1, hydraulic base sealed permanent type open hole packer, comprise the mandrel 17 with axially extending bore, one end of mandrel 17 connects the first joint 1, the other end connects the second joint 18, mandrel 17 is socketed a left side successively from the first joint 1 to the second joint 18 and pushes away auxiliary packing element 6, first spacer ring 7 of slips 3, first expansion of metal bowl the 5, first auxiliary packing element pressure ring 19, first, main packing element 9, second spacer ring 20, second auxiliary auxiliary packing element pressure ring 10, the second expansion of metal bowl 11 of packing element 21, second, shearing ring 12, piston 14 and locating snap ring 15; Wherein a left side pushes away one end of slips 3 between the first joint 1 and mandrel 17, and seal with the first joint 1 and mandrel 17 and be slidably connected, a left side is pushed away slips 3 and is connected by the first shear pin 2 with the first joint 1, a left side pushes away slips 3 and the first joint 1 and mandrel 17 and jointly forms the first pressure transmission room 22, mandrel 17 has the first pressure transmission hole 23 of connection first pressure transmission room 22 and mandrel 17 inside; The inner surface that a left side pushes away slips 3 has dentation slip insert 24, and mandrel 17 is provided with and stops a left side to push away first slips 4 with slips tooth of slips 3 to the first joint 1 direction movement; Be provided with support ring 8 between main packing element 9 and mandrel 17, support ring 8 is positioned at the middle part of main packing element 9; In the outside of piston 14, cover has urceolus 16, one end and second joint 18 of urceolus 16 are tightly connected, the other end of urceolus 16 is connected by the second shear pin 13 with shearing ring 12, piston 14 is connected with slipper seal between mandrel 17 and urceolus 16, the inwall of piston 14 has dentation slip insert 25, mandrel 17 is provided with second slips 26 with slips tooth stoping piston 14 to the second joint 18 direction movement; Mandrel 17 also has the second pressure transmission hole 27, second pressure transmission hole position 27 between locating snap ring 15 and piston 14, locating snap ring 15 and urceolus 16 and mandrel 17 axial restraint.A left side pushes away between slips 3 and the first joint 1, and a left side pushes away and is respectively arranged with the first O-ring seals 28 between slips 3 and mandrel 17 and seals.Be respectively equipped with the second O-ring seals 29 between piston 14 and urceolus 16 and mandrel 17 to seal.Seal by arranging the 3rd O-ring seals 30 between urceolus 16 and the second joint 18.Mandrel 17 with between the first joint 1 and the second joint 18 for being threaded.First joint 1 female joint, the second joint 18 is male joint.
Embodiment 2:
The present embodiment is the barefoot completion packing method of the above-mentioned packer of use of the present invention, relates to excluder portion and please refer to Fig. 1 and foregoing description.The present embodiment is specific as follows: the barefoot completion packing method using above-mentioned packer, comprises the steps:
A. by above-mentioned packer access completion tubular column, the second joint of wherein said packer passes through the shaft isolation valve of oil pipe connecting band ball seat, and the first joint is connected with oil pipe or drilling rod;
B. described packer is delivered to downhole designs position, drop into setting ball on the ball seat of shaft isolation valve by drilling rod or oil pipe;
C. suppress from oil pipe or drilling rod, pressure is delivered to a left side respectively by the first pressure transmission hole 23 on mandrel 17 and the second pressure transmission hole 27 and pushes away on slips 3 and piston 14, after pressure reaches shear force, first shear pin 2 and the second shear pin 13 are cut off respectively, a left side pushes away slips 3 and piston 14 moves to the middle part of mandrel 17 under effect respectively vertically at pressure, final pressure is passed to the both sides of main packing element 9, makes main packing element 9 by compression swelling, finally forms seal pack;
D. simultaneously, a left side pushes away slips 3 and is mutually engaged with the first slips 4, stops a left side to push away slips 3 and moves to the first joint 1 direction, piston 14 and the second slips 26 engaged, stop piston 14 to move to the second joint 18 direction, thus stop the resilience of main packing element 9, form lasting packing.
Above embodiment is only exemplary embodiment of the present invention, and be not used in restriction the present invention, protection scope of the present invention is defined by the claims.Those skilled in the art can in essence of the present invention and protection domain, and make various amendment or equivalent replacement to the present invention, this amendment or equivalent replacement also should be considered as dropping in protection scope of the present invention.
Claims (5)
1. hydraulic base sealed permanent type open hole packer, it is characterized in that, comprise the mandrel with axially extending bore, one end of mandrel connects the first joint, the other end connects the second joint, mandrel is socketed a left side successively from the first joint to the second joint and pushes away slips, the first expansion of metal bowl, the first auxiliary packing element pressure ring, the first auxiliary packing element, the first spacer ring, main packing element, the second spacer ring, the second auxiliary packing element pressure ring, the second auxiliary packing element, the second expansion of metal bowl, shearing ring, piston and locating snap ring; Wherein a left side pushes away one end of slips between the first joint and mandrel, and be slidably connected with the first joint and stem seal, a left side is pushed away slips and is connected by the first shear pin with the first joint, a left side pushes away slips and the first joint and mandrel and jointly forms the first pressure transmission room, mandrel has the first pressure transmission hole of connection first pressure transmission room and mandrel inside; The inner surface that a left side pushes away slips has dentation slip insert, and mandrel is provided with and stops a left side to push away first slips with slips tooth of slips to the first joint direction movement; Be provided with support ring between main packing element and mandrel, support ring is positioned at the middle part of main packing element; In the outside of piston, cover has urceolus, one end of urceolus is connected with the second joint sealing, the other end of urceolus is connected by the second shear pin with shearing ring, piston is connected with slipper seal between mandrel and urceolus, the inwall of piston has dentation slip insert, mandrel is provided with second slips with slips tooth stoping piston to the second joint direction movement; Described mandrel also has the second pressure transmission hole, described second pressure transmission hole between locating snap ring and piston, described locating snap ring and urceolus and mandrel axial restraint;
A described left side pushes away between slips and the first joint, and a left side pushes away and is respectively arranged with the first O-ring seals between slips and mandrel and seals;
Be provided with the second O-ring seals between described piston and urceolus and mandrel to seal.
2. hydraulic base sealed permanent type open hole packer according to claim 1, is characterized in that, seals between described urceolus and the second joint by arranging the 3rd O-ring seals.
3. hydraulic base sealed permanent type open hole packer according to claim 1, is characterized in that, described mandrel with between the first joint and the second joint for being threaded.
4. hydraulic base sealed permanent type open hole packer according to claim 1, is characterized in that, described first joint is female joint, and described second joint is male joint.
5. use the barefoot completion packing method of the packer described in any one of claim 1 to 4, it is characterized in that, comprise the steps:
A. by above-mentioned packer access completion tubular column, the second joint of wherein said packer passes through the shaft isolation valve of oil pipe connecting band ball seat, and the first joint is connected with oil pipe or drilling rod;
B. described packer is delivered to downhole designs position, drop into setting ball on the ball seat of shaft isolation valve by drilling rod or oil pipe;
C. suppress from oil pipe or drilling rod, pressure is delivered to a left side respectively by the first pressure transmission hole on mandrel and the second pressure transmission hole and pushes away on slips and piston, after pressure reaches shear force, first shear pin and the second shear pin are cut off respectively, a left side pushes away slips and piston moves to the middle part of mandrel under effect respectively vertically at pressure, final pressure is passed to the both sides of main packing element, makes main packing element by compression swelling, finally forms seal pack;
D. simultaneously, a left side pushes away slips and is mutually engaged with the first slips, stops a left side to push away slips and moves to the first joint direction, piston and the second slips engaged, prevention piston moves to the second joint direction, thus stops main packing element resilience, forms lasting packing.
Priority Applications (1)
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CN201110450022.4A CN103184848B (en) | 2011-12-29 | 2011-12-29 | Hydraulic base sealed permanent type open hole packer and barefoot completion packing method |
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CN201110450022.4A CN103184848B (en) | 2011-12-29 | 2011-12-29 | Hydraulic base sealed permanent type open hole packer and barefoot completion packing method |
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CN103184848B true CN103184848B (en) | 2015-09-30 |
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CN103670331B (en) * | 2013-12-31 | 2016-06-08 | 安东石油技术(集团)有限公司 | A kind of shaft isolation valve |
CN104120998A (en) * | 2014-07-04 | 2014-10-29 | 中国石油天然气股份有限公司 | Suspension packer for gas well layered exploitation |
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CN109798086A (en) * | 2019-03-01 | 2019-05-24 | 中石化石油工程技术服务有限公司 | High temperature and pressure oil/gas well Open-Hole Section insulates completion system |
CN110905439B (en) * | 2019-11-28 | 2022-03-01 | 中国石油集团川庆钻探工程有限公司 | Integrated downhole operation tool based on bidirectional slip hydraulic permanent packer |
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CN113123753A (en) * | 2019-12-31 | 2021-07-16 | 中国石油化工股份有限公司 | Soluble easy-to-drill open hole packer and using method thereof |
CN111350473B (en) * | 2020-03-17 | 2021-02-26 | 江苏柯沣石化机械有限公司 | Packer |
CN113445958B (en) * | 2021-05-26 | 2023-04-11 | 中国海洋石油集团有限公司 | Compression packer |
CN113338839A (en) * | 2021-06-15 | 2021-09-03 | 中石化石油工程技术服务有限公司 | Self-locking type oil and gas well open hole section packing well completion device |
CN114837599B (en) * | 2022-05-12 | 2022-11-04 | 百勤能源科技(惠州)有限公司 | High-temperature high-pressure recoverable packer |
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