CN104088601A - Channeling sealing tool for outer packer of cement paste filled pipe - Google Patents
Channeling sealing tool for outer packer of cement paste filled pipe Download PDFInfo
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- CN104088601A CN104088601A CN201410299406.4A CN201410299406A CN104088601A CN 104088601 A CN104088601 A CN 104088601A CN 201410299406 A CN201410299406 A CN 201410299406A CN 104088601 A CN104088601 A CN 104088601A
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- fixed cover
- cement paste
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- packing element
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Abstract
The invention discloses a channeling sealing tool for an outer packer for a cement paste filled pipe. The channeling sealing tool mainly comprises a center pipe, an upper joint, a lower joint and a hydraulic filling expansion mechanism, wherein the upper joint and the lower joint are arranged at two ends of the center pipe respectively, the hydraulic filling expansion mechanism sleeves the center pipe and mainly comprises an upper fixed sleeve, a hydraulic retaining rod, an annular piston, a cylinder jacket, a cement paste one-way inflow valve, a center fixed sleeve, a rubber filling-sleeve one-way valve, an expandable rubber sleeve, a slidable sealing sleeve and a lower fixed sleeve. By alternatively pressing the annular piston from the inside and the outside of the casing, the cement paste is filled to expand the expandable rubber sleeve, dual construction processes of well cementation by cementing and filling the hydraulic expansion type outer packer by the cement paste are met, and the expansion bridge blinding method is simple in construction and good in operability, and expansion bridge blinding of shallow shafts, deep shafts and highly-deviated wells can be smoothly realized. Meanwhile, other construction processes are unaffected.
Description
Technical field
The present invention relates to offshore oilfield field of engineering technology, specifically a kind of cement paste filling tube external packer envelope is altered instrument.
Background technology
In the drilling engineering of petroleum industry, completion cementing technology is to be lowered to sleeve pipe in the open hole well having bored, and the cement paste configuring is injected into the annular space of well and sleeve pipe, and Hou Ning forms a firm cement sheath.Its Main Function is: packing oil, gas, water layer, stop the mutual channelling of ground interlayer fluid-phase, protection producing zone; Packing severe leakage layer, high pressure zone or other bad ground such as easily cave in; Supporting sleeve and prevent the corrosion of underground fluid to sleeve pipe.The quality of cementing quality directly has influence on follow-up petroleum production engineering and oil recovery factor.And thinner for oil-gas-water layer interlayer in a bite well, carry out conventional waterflooding mud construction technology, how to ensure interlayer cementing quality, avoid the mutual water breakthrough groove of oil-gas-water layer in recovery process, be to reduce production costs, improve the important channel of this well production efficiency.
Cementing Practices proves both at home and abroad, application expansion type external pipe packer technology can make the annular space between sleeve pipe and pit shaft form bridge blinding, that the hydraulic oil air water that while avoiding abnormal formation pressure or cement paste to solidify, weightlessness causes is ganged up, prevent that after cementing the well, cover outer tube oil gas occurring sprays the effective means of emitting, can improve casing centralization degree and stability, have positive effect to promoting cementing quality simultaneously.
At present, the domestic expansion type external pipe packer for bridge blinding, include and meet oil chance water self-expansion type external packer of pipe and hydraulic buckling type external packer of pipe, but relevant with the present invention, and domestic generally employing is hydraulic buckling type structure, and the fluid filling such as water, mud packer reaches sealing effectiveness.
Rough estimates, the fluid of filling for most hydraulic buckling type external packer of pipe of bridge blinding is at present all water or mud, because water and mud are fluid states always, once packer set valve is because of the aging seal failure of rubber parts, water or the mud of packer the inside filling will run off, and therefore packer can lose sealing function; Only have small part hydraulic buckling type external packer of pipe grout filling, after cement paste solidifies, can realize quite long sealing function, and packer, in expansion process, can push country rock, makes stratum become closely knit, further improves sealing effectiveness.Although above-mentioned at present grout filling hydraulic buckling type external packer of pipe used has advantages of that bridge blinding is effective, due to following reason, carry out bridge blinding user with cement paste packing fluid compression swelling formula external packer of pipe little, be difficult to apply:
1) current conventional grout filling hydraulic buckling type external packer of pipe, its construction method has two kinds, be inner tube method and full well cementing method, but due to the restriction of construction technology, these two kinds of methods all can not meet cementing well and the enforcement by the dual technique of cement paste packing fluid compression swelling formula external packer of pipe simultaneously, can only carry out wherein a kind of construction technology.
2) coiled tubing relatively good realization for inner tube method, but also more complicated of technique operates more difficult, is not easy to apply.
3) although full well cementing method operates is easier to, waste a large amount of cement, and contaminated environment, be also not easy to apply.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, provide that a kind of construction is simple, operability is good, all can expand the smoothly cement paste filling tube external packer envelope of bridge blinding of shallow well, deep-well, high angle hole is altered to instrument.
For achieving the above object, the technical solution adopted in the present invention is:
A kind of cement paste filling tube external packer envelope is altered instrument, and it is mainly by central tube, top connection, lower contact and hydraulic pressure are filled expansion mechanism and are formed, and wherein, top connection and lower contact are located at respectively the two ends of central tube, and described hydraulic pressure is filled expansion mechanism mainly by upper fixed cover, hydraulic pressure lever, annular piston, cylinder sleeve, the unidirectional inflow valve of cement paste, middle fixed cover, fill packing element one way valve, inflatable packing element, slipper seal cover and lower fixed cover form, fixed cover, annular piston, cylinder sleeve, middle fixed cover, inflatable packing element, slipper seal cover and lower fixed cover are sleeved on outside central tube, and fixed cover and middle fixed cover are fixed cylinder sleeve, and middle fixed cover and slipper seal cover are fixed inflatable packing element, and lower fixed cover is located at the lower end of central tube slipper seal cover is blocked, described central tube, cylinder sleeve, upper fixed cover and middle fixed cover surround a plunger shaft, described annular piston is arranged in plunger shaft, be provided with pressure transmission hole near the upper end of plunger shaft and the tube wall that is positioned at central tube, described upper pressure transmission hole is communicated with the plunger shaft on annular piston, described hydraulic pressure lever is laterally located in central tube, one end of hydraulic pressure lever blocks upper pressure transmission hole, described middle fixed cover is provided with lower pressure transmission hole, described lower pressure transmission hole is communicated with the lower end of plunger shaft, the unidirectional inflow valve of described cement paste is located at lower pressure transmission hole place, gap between described middle fixed cover and central tube tube wall is cement paste passage, cement paste passage is communicated with the plunger shaft under annular piston with inflatable packing element, described filling packing element one way valve is located in cement paste passage.
The inwall of described lower fixed cover is provided with internal thread, and one end of described lower fixed cover is threaded with the lower end of central tube, and the other end is threaded with lower contact.
Described top connection is to be made up of tubulose pipe nipple and adapter sleeve, and the inwall of described adapter sleeve is provided with internal thread, and one end of tubulose pipe nipple is threaded with adapter sleeve.
The inwall of fixed cover is provided with internal thread, and one end of fixed cover is threaded with the upper end of central tube, and the other end is threaded with the other end of tubulose pipe nipple.
The external diameter that fixed cover, cylinder sleeve, middle fixed cover, inflatable packing element and slipper seal are overlapped is identical.
Beneficial effect of the present invention:
1) on conventional cementing technology basis, only need by well cementation pump from ground toward sleeve pipe in circulation pressurization and the mode bleeding off pressure, be available water mud toward constantly filling in inflatable packing element, until inflatable packing element complete expansion, not only can meet cementing well and the enforcement by the dual technique of cement paste packing fluid compression swelling formula external packer of pipe simultaneously, and construction is simple, operability is good, shallow well, deep-well, the high angle hole bridge blinding that all can expand smoothly does not also affect other working procedure simultaneously.
2) after external casing packer expands, stowing pressure is generally at 10MPa～15MPa.This pressure acts on country rock by packing element, and country rock is had to good compaction, can greatly improve the buffer action of stratum, country rock place to pressure.
3) external casing packer, in expansion process, has direct centralizing function to the upper and lower sleeve pipe of packer, and the casing annulus at the upper and lower position of packer can form complete cement sheath, can improve cementing quality.
4) stratum and cementing quality particularly thorny for oil gas water, that interlayer is thin are difficult to the interval ensureing, this instrument can improve pressure isolation function preferably, improves development effectiveness.
5) for the transformation of needs pressure, cementing quality is required to high interval, this packer also can be installed, improve the isolation effect of segmentation transformation.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Fig. 1 is structural representation of the present invention.
In figure: 1, central tube; 2, lower contact; 3, upper fixed cover; 4, hydraulic pressure lever; 5, annular piston; 6, cylinder sleeve; 7, the unidirectional inflow valve of cement paste; 8, middle fixed cover; 9, fill packing element one way valve; 10, inflatable packing element; 11, slipper seal cover; 12, lower fixed cover; 13, plunger shaft; 14, upper pressure transmission hole; 15, lower pressure transmission hole; 16, cement paste passage; 17, tubulose pipe nipple; 18, adapter sleeve.
Detailed description of the invention
As shown in Figure 1, a kind of cement paste filling tube external packer envelope is altered instrument, it is mainly by central tube 1, top connection, lower contact 2 and hydraulic pressure are filled expansion mechanism and are formed, wherein, top connection and lower contact 2 are located at respectively the two ends of central tube 1, described hydraulic pressure is filled expansion mechanism mainly by upper fixed cover 3, hydraulic pressure lever 4, annular piston 5, cylinder sleeve 6, the unidirectional inflow valve 7 of cement paste, middle fixed cover 8, fill packing element one way valve 9, inflatable packing element 10, slipper seal cover 11 and lower fixed cover 12 form, fixed cover 3, annular piston 5, cylinder sleeve 6, middle fixed cover 8, inflatable packing element 10, slipper seal cover 11 and lower fixed cover 12 are sleeved on outside central tube 1.Fixed cover 3 and middle fixed cover 8 are by fixing cylinder sleeve 6, middle fixed cover 8 and slipper seal cover 11 are by fixing inflatable packing element 10, lower fixed cover 12 is located at the lower end of central tube 1 slipper seal cover 11 is blocked, concrete mounting means is: the inwall of lower fixed cover 12 is provided with internal thread, one end of described lower fixed cover 12 is threaded with the lower end of central tube 1, and the other end is threaded with lower contact 2.Described central tube 1, cylinder sleeve 6, upper fixed cover 3 and middle fixed cover 8 surround a plunger shaft 13, described annular piston 5 is arranged in plunger shaft 13, be provided with pressure transmission hole 14 near the upper end of plunger shaft 13 and the tube wall that is positioned at central tube 1, described upper pressure transmission hole 14 is communicated with the plunger shaft 13 on annular piston 5, described hydraulic pressure lever 4 is laterally located in central tube 1, one end of hydraulic pressure lever 4 blocks upper pressure transmission hole 14, described middle fixed cover 8 is provided with lower pressure transmission hole 15, described lower pressure transmission hole 15 is communicated with the lower end of plunger shaft 13, the unidirectional inflow valve 7 of described cement paste is located at lower pressure transmission hole 15 places, gap between described middle fixed cover 8 and central tube 1 tube wall is cement paste passage 16, cement paste passage 16 is communicated with the plunger shaft under annular piston 5 13 with inflatable packing element 10, described filling packing element one way valve 9 is located in cement paste passage 16.
Described top connection is to be made up of tubulose pipe nipple 17 and adapter sleeve 18, and the inwall of described adapter sleeve 18 is provided with internal thread, and one end of tubulose pipe nipple 17 is threaded with adapter sleeve 18.The inwall of fixed cover 3 is provided with internal thread, and one end of fixed cover 3 is threaded with the upper end of central tube 1, and the other end is threaded with the other end of tubulose pipe nipple 17.
The external diameter of fixed cover 3, cylinder sleeve 6, middle fixed cover 8, inflatable packing element 10 and slipper seal cover 11 is identical, after assembling, upper fixed cover 3, cylinder sleeve 6, middle fixed cover 8, inflatable packing element 10 and the outer circumference surface of slipper seal cover 11 are concordant, therefore there is a kind of associative perception.
Embodiments of the present invention comprise the following steps:
1) the present invention is connected on sleeve pipe, and is lowered into downhole designs by packing position with sleeve pipe, cement the well.
2) move down in sleeve pipe when well cementation replaces plug, and while arriving hydraulic pressure lever 4 position of instrument of the present invention, hydraulic pressure lever 4 is severed and is opened upper pressure transmission hole 14, makes to communicate with the plunger shaft 13 on annular piston 5 in sleeve pipe.
3) well cementation replaces after plug bruising, descending under the hydraulic action of annular piston 5 in sleeve pipe, the unidirectional inflow valve 7 of cement paste cuts out, cement paste in plunger shaft 13 under annular piston 5 is pushed cement paste passage 16 by annular piston 5, be filled in inflatable packing element 10 through filling packing element one way valve 9, inflatable packing element 10 is expanded.
4) after well head bleeds off pressure, pressure in plunger shaft 13 on annular piston 5 is less than the pressure in the plunger shaft 13 under annular piston 5, annular piston 5 is up, filling packing element one way valve 9 closes, the unidirectional inflow valve 7 of cement paste is opened, and cement paste, by lower pressure transmission hole 14 and the unidirectional inflow valve 7 of cement paste that communicates with it, enters into the plunger shaft 13 under annular piston 5, in the time that annular piston 5 reaches the top of plunger shaft 13, complete a filling action cycle.
5) and then by well cementation pump pressurize in from ground toward sleeve pipe, make again annular piston 5 descending, the unidirectional inflow valve 7 of cement paste cuts out, cement paste in plunger shaft 13 under annular piston 5 is pushed cement grout passage 16 by annular piston 5, be filled in inflatable packing element 10 through filling packing element one way valve 9, inflatable packing element 10 is expanded; Then well head bleeds off pressure again, annular piston 5 is up, filling packing element one way valve 9 closes, the unidirectional inflow valve 7 of cement paste is opened, cement paste is by lower pressure transmission hole 14 and the unidirectional inflow valve 7 of cement paste that communicates with it, enter into the plunger shaft 13 under annular piston 5, in the time that annular piston 5 reaches the top of plunger shaft 13, complete another filling action cycle.
6) repeating step 5), can realize and use cement paste toward the interior continuous filling of inflatable packing element 10, until 10 complete expansions of inflatable packing element are for this reason, after cement paste solidifies, complete design by the successful bridge blinding of packing position.
The above is the preferred embodiment of the present invention; certainly can not limit with this interest field of the present invention; should be understood that; for those skilled in the art; technical scheme of the present invention is modified or is equal to replacement, do not depart from the protection domain of technical solution of the present invention.
Claims (5)
1. cement paste filling tube external packer envelope is altered an instrument, it is characterized in that: it is mainly by central tube, top connection, lower contact and hydraulic pressure are filled expansion mechanism and are formed, and wherein, top connection and lower contact are located at respectively the two ends of central tube, and described hydraulic pressure is filled expansion mechanism mainly by upper fixed cover, hydraulic pressure lever, annular piston, cylinder sleeve, the unidirectional inflow valve of cement paste, middle fixed cover, fill packing element one way valve, inflatable packing element, slipper seal cover and lower fixed cover form, fixed cover, annular piston, cylinder sleeve, middle fixed cover, inflatable packing element, slipper seal cover and lower fixed cover are sleeved on outside central tube, and fixed cover and middle fixed cover are fixed cylinder sleeve, and middle fixed cover and slipper seal cover are fixed inflatable packing element, and lower fixed cover is located at the lower end of central tube slipper seal cover is blocked, described central tube, cylinder sleeve, upper fixed cover and middle fixed cover surround a plunger shaft, described annular piston is arranged in plunger shaft, be provided with pressure transmission hole near the upper end of plunger shaft and the tube wall that is positioned at central tube, described upper pressure transmission hole is communicated with the plunger shaft on annular piston, described hydraulic pressure lever is laterally located in central tube, one end of hydraulic pressure lever blocks upper pressure transmission hole, described middle fixed cover is provided with lower pressure transmission hole, described lower pressure transmission hole is communicated with the lower end of plunger shaft, the unidirectional inflow valve of described cement paste is located at lower pressure transmission hole place, gap between described middle fixed cover and central tube tube wall is cement paste passage, cement paste passage is communicated with the plunger shaft under annular piston with inflatable packing element, described filling packing element one way valve is located in cement paste passage.
2. cement paste filling tube external packer envelope according to claim 1 is altered instrument, it is characterized in that: the inwall of described lower fixed cover is provided with internal thread, and one end of described lower fixed cover is threaded with the lower end of central tube, and the other end is threaded with lower contact.
3. cement paste filling tube external packer envelope according to claim 2 is altered instrument, it is characterized in that: described top connection is to be made up of tubulose pipe nipple and adapter sleeve, and the inwall of described adapter sleeve is provided with internal thread, and one end of tubulose pipe nipple is threaded with adapter sleeve.
4. cement paste filling tube external packer envelope according to claim 3 is altered instrument, it is characterized in that: the inwall of fixed cover is provided with internal thread, one end of fixed cover is threaded with the upper end of central tube, and the other end is threaded with the other end of tubulose pipe nipple.
5. cement paste filling tube external packer envelope according to claim 4 is altered instrument, it is characterized in that: the external diameter that fixed cover, cylinder sleeve, middle fixed cover, inflatable packing element and slipper seal are overlapped is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299406.4A CN104088601A (en) | 2014-06-30 | 2014-06-30 | Channeling sealing tool for outer packer of cement paste filled pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410299406.4A CN104088601A (en) | 2014-06-30 | 2014-06-30 | Channeling sealing tool for outer packer of cement paste filled pipe |
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| CN104088601A true CN104088601A (en) | 2014-10-08 |
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| CN201410299406.4A Pending CN104088601A (en) | 2014-06-30 | 2014-06-30 | Channeling sealing tool for outer packer of cement paste filled pipe |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278095A (en) * | 2018-03-15 | 2018-07-13 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of piston reciprocating type exempts to bore plug stage cementing device |
| CN110905442A (en) * | 2019-12-12 | 2020-03-24 | 中国石油集团渤海钻探工程有限公司 | Empty cement paste of sleeve pipe outer loop fills packer |
| CN111005701A (en) * | 2020-01-14 | 2020-04-14 | 胜利油田利丰稠油技术开发有限公司 | Fishing and fast drilling composite material well fixing and completing tool |
| CN111101886A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Sectional well cementing tool and technological method |
| CN116291299A (en) * | 2023-03-16 | 2023-06-23 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
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Patent Citations (5)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108278095A (en) * | 2018-03-15 | 2018-07-13 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of piston reciprocating type exempts to bore plug stage cementing device |
| CN108278095B (en) * | 2018-03-15 | 2024-04-02 | 中国石油化工股份有限公司 | Piston reciprocating type drilling-free plug stage cementing device |
| CN111101886A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Sectional well cementing tool and technological method |
| CN111101886B (en) * | 2018-10-25 | 2023-08-04 | 中国石油化工股份有限公司 | Sectional well cementation tool and process method |
| CN110905442A (en) * | 2019-12-12 | 2020-03-24 | 中国石油集团渤海钻探工程有限公司 | Empty cement paste of sleeve pipe outer loop fills packer |
| CN110905442B (en) * | 2019-12-12 | 2022-04-01 | 中国石油集团渤海钻探工程有限公司 | Empty cement paste of sleeve pipe outer loop fills packer |
| CN111005701A (en) * | 2020-01-14 | 2020-04-14 | 胜利油田利丰稠油技术开发有限公司 | Fishing and fast drilling composite material well fixing and completing tool |
| CN116291299A (en) * | 2023-03-16 | 2023-06-23 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
| CN116291299B (en) * | 2023-03-16 | 2023-11-17 | 河海大学 | Rapidly-rebounded compression type oil cylinder packer and packer sealing method |
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Application publication date: 20141008 |
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