CN204126624U - Open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string - Google Patents
Open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string Download PDFInfo
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- CN204126624U CN204126624U CN201420575193.9U CN201420575193U CN204126624U CN 204126624 U CN204126624 U CN 204126624U CN 201420575193 U CN201420575193 U CN 201420575193U CN 204126624 U CN204126624 U CN 204126624U
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Abstract
The utility model discloses a kind of open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string, comprise tail pipe, external packer of pipe and be arranged on multiple sliding sleeve ejectors, the base injcction device in described tail pipe, the upper end of described tail pipe is connected to drilling rod by hanger, described external packer of pipe is arranged on outside described tail pipe, for being fixed described tail pipe, being positioned at the first sliding sleeve ejector is connected to aboveground by oil pipe, connected by oil pipe between adjacent sliding sleeve ejector, the sliding sleeve ejector being positioned at last position is connected to described base injcction device by oil pipe.Tubular column structure in the utility model is easy to down, conveniently carry out secondary transformation after pressure break.
Description
Technical field
The utility model relates to oil drilling equipment field, in particular to a kind of open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string.
Background technology
Open-hole horizontal well staged fracturing technology is a kind of effective means of the fine and close oil-gas reservoir of exploitation, horizontal segment is divided into multistage by open hole packer by conventional " open hole packer+sliding sleeve " bore hole staged fracturing technology as required, then use the mode dropping into low-density ball to open the sliding sleeve of each section, carry out pressing crack construction.This technique one-trip string both as completion tubular column, also as fracturing string, will can save operating cost, need not carry out cementing the well and perforating job, improve completion efficiency.But the packer external diameter that existing " open hole packer+sliding sleeve " completion tubular column uses is compared with large and quantity is many, have in well enter under " open hole packer+sliding sleeve " completion tubular column in the open-hole horizontal well of the bad hole environment such as undergauge, dog-leg degree is large, frictional resistance is large more difficult, even cannot enter down, and be difficult to after pressure break carry out secondary transformation, cause the application of this technique to be restricted.
Utility model content
Technical problem to be solved in the utility model is, provides a kind of and be easy to down, conveniently carries out after pressure break the tubular column structure of secondary transformation.
Therefore, the technical solution of the utility model is as follows:
A kind of open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string, comprise tail pipe, external packer of pipe and be arranged on multiple sliding sleeve ejectors, the base injcction device in described tail pipe, the upper end of described tail pipe is connected to drilling rod by hanger, described external packer of pipe is arranged on outside described tail pipe, for being fixed described tail pipe, being positioned at the first sliding sleeve ejector is connected to aboveground by oil pipe, connected by oil pipe between adjacent sliding sleeve ejector, the sliding sleeve ejector being positioned at last position is connected to described base injcction device by oil pipe.
Wherein, external packer of pipe is used for anchoring string.
In addition, with each sliding sleeve ejector, base injcction device are equal corresponding a centralizer can be set; Described base injcction device is also connected to an one way valve by oil pipe, and described one way valve is connected to a guide head by screen casing; The end of described tail pipe is also provided with setting ball seat, float shoe and guide shoe.Wherein, the mounting means of centralizer, one way valve, screen casing, guide head, setting ball seat, float shoe and guide shoe all belongs to general knowledge known in those skilled in the art, does not repeat them here.
Tubular column structure in the utility model, combine the advantage of open-hole horizontal well completion and fixed tubular column jetting staged fracturing, adopt and hang tail pipe and not cement the well completion mode, enter under completion tubular column is easy, effectively can avoid that routine " open hole packer+sliding sleeve " staged fracturing completion tubular column packer is many, external diameter is large, problem is entered under completion tubular column in the open-hole horizontal well having the bad hole environment such as undergauge, dog-leg degree is large, frictional resistance is large, need not carry out cementing the well and perforating job, improve completion efficiency and save operating cost; In tail pipe, fixed tubular column jetting staged fracturing technology, is not with packer, and after pressure, tubing string can take out, thus is convenient to later-stage secondary transformation.
Accompanying drawing explanation
Fig. 1 is the structural representation of the open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string according to the utility model embodiment
Fig. 2 is the internal construction schematic diagram of open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string in Fig. 1.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
As depicted in figs. 1 and 2, according to the open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string of embodiment of the present utility model, comprise tail pipe 4, external packer of pipe 5 and the multiple sliding sleeve ejector b be arranged in described tail pipe 4, base injcction device 10, the upper end of described tail pipe 4 is connected to drilling rod 13 by hanger 6, described external packer of pipe 5 is arranged on outside described tail pipe 4, for being fixed described tail pipe 4, being positioned at the first sliding sleeve ejector b is connected to aboveground by oil pipe 11, connected by oil pipe 11 between adjacent sliding sleeve ejector b, the sliding sleeve ejector b being positioned at last position is connected to described base injcction device 10 by oil pipe 11.
Wherein, external packer of pipe 5 is for anchoring string; 12 is safety joint; The number needs of sliding sleeve ejector b will need according to concrete construction to carry out Choice and design, but not is necessary for two shown in Fig. 2.
In addition, a centralizer a can be set with each sliding sleeve ejector b, base injcction device 10 are all corresponding; Described base injcction device 10 is also connected to an one way valve 9 by oil pipe 11, and described one way valve 9 is connected to a guide head 7 by screen casing 8; The end of described tail pipe 4 is also provided with setting ball seat 3, float shoe 2 and guide shoe 1.Wherein, the mounting means of centralizer a, one way valve 9, screen casing 8, guide head 7, setting ball seat 3, float shoe 2 and guide shoe 1 all belongs to general knowledge known in those skilled in the art, does not repeat them here.
Tubular column structure in the utility model, combine the advantage of open-hole horizontal well completion and fixed tubular column jetting staged fracturing, adopt and hang tail pipe and not cement the well completion mode, enter under completion tubular column is easy, effectively can avoid that routine " open hole packer+sliding sleeve " staged fracturing completion tubular column packer is many, external diameter is large, problem is entered under completion tubular column in the open-hole horizontal well having the bad hole environment such as undergauge, dog-leg degree is large, frictional resistance is large, need not carry out cementing the well and perforating job, improve completion efficiency and save operating cost; In tail pipe, fixed tubular column jetting staged fracturing technology, is not with packer, and after pressure, tubing string can take out, thus is convenient to later-stage secondary transformation.
Beneficial effect in the utility model is as follows: hang tail pipe completion mode of not cementing the well and need not carry out cementing the well and perforating job, without cementing slurry pollution, and reservoir protec-tion; The completion tubular column that hanger hangs tail pipe arranges that near casing shoe an external packer of pipe is used for packing barefoot interval and grappling completion tubular string, enters easily under tubing string, little by bad hole ambient influnence; In tail pipe, fixed tubular column jetting fracturing strings, is not with packer, and after pressure, tubing string can take out, and is convenient to later-stage secondary transformation; In tail pipe, fixed tubular column jetting fracturing strings is without packer, drops into corresponding size ball and can open sliding sleeve at different levels, realize a running string and complete multistage perforation and fracturing work; Closed the advantage of open-hole horizontal well completion and fixed tubular column jetting fracturing strings, this technology can manufacture crack at assigned address more exactly, can save the activity duration, reduce operating risk.
Based on the tubular column structure in the utility model, its form of construction work is as follows:
Completion tubular column implementation process: after Open-Hole Section finishing drilling, through scraping-simulation drifting operation, ensures that well is smooth, sends into completion tubular column with drilling rod; Connect and just note pipeline, replace mud in pit shaft with the KCL aqueous solution, until it is consistent to import and export aqueous solution performance; After having replaced mud, drop into low-density ball from well head, with cementing truck pumping ball to setting ball seat 3, pressure foot sealing tube external packer 5 and hanger 6 in drilling rod; Setting complete after, continue raised pressure in drilling rod, put hanger 6 aside, above carry drilling rod, suppress in drilling rod, the sealing of inspection hanger 6, voltage stabilizing, after pressure drop is qualified, trips out drilling rod.
Fracturing string implementation process: after drifting, well-flushing, according to shown in Fig. 2 connect and under enter fixed tubular column jetting staged fracturing operating tool string; Fracture well head is installed, sets Construction traffic, connect surface line, after pressure testing is qualified, can pressing crack construction be carried out; Lowly after completing, directly carry out first paragraph abrasive perforating pressure break by base injcction device; Drop into corresponding size low-density ball, open sliding sleeve ejector, carry out subsequent segment abrasive perforating pressure break.The perforation stage need control sleeve pipe back pressure by oil nozzle, and during guarantee perforation, casing pressure is less than upper strata termination of pumping pressure, and the pressing crack construction stage controls casing pressure by adjustment pressure break pump truck output; Pressing crack construction terminates, open flow discharge opeing.
For 6, " open-hole horizontal well divides 3 sections of constructions to be described; be below concrete implementation step: as shown in Figure 1; after finishing drilling, and the completion mode of 7 " tail tube hanging 4.5 " tail pipe is opened in employing two, and what whole pipe ganged up that the hanger 6 of topmost is fixed in the above two drives sleeve pipe 7 " on sleeve pipe.The step that completion, pressure break are specifically implemented is:
After 1 Open-Hole Section finishing drilling, through scraping-simulation drifting operation, ensure well smooth, under enter completion tubular column carry out pit shaft prepare;
2 press connection shown in Fig. 1 and running string: tail pipe+" drilling rod is to well head for hanger 6+3.5 for guide shoe 1+4.5 " tail pipe+float shoe 2+4.5 " tail pipe+setting ball seat 3+4.5 " tail pipe+external packer of pipe 5+4.5 ";
3 connections just note pipeline, and surface line pressure testing is to 30MPa, and tubing string ballast 10t, with whole mud in 2%KCL aqueous solution replacement pit shaft to slurry tank, until it is consistent to import and export aqueous solution performance;
4 replaced mud after, drop into low-density ball to setting ball seat 3, with 0.5 ~ 0.6m from well head
3the release of/min displacement pump puts in place, pressure foot sealing tube external packer 5 and hanger 6 in drilling rod;
Continue raised pressure in 5 drilling rods, put hanger 6 aside, above carry drilling rod 10m, suppress 15MPa in drilling rod, the sealing of inspection hanger 6, voltage stabilizing 15min, it is qualified that pressure drop is no more than 0.5MPa, trips out drilling rod;
After 6 driftings, well-flushing, according to shown in Fig. 2 connect and under enter fixed tubular column jetting staged fracturing operating tool string: oil pipe+oil pipe+" oil pipe is to well head for safety joint 12+2-7/8 for sliding sleeve ejector b1+ centralizer a+2-7/8 " oil pipe+sliding sleeve ejector b2+2-7/8 " for guide head 7+ screen casing 8+ one way valve 9+2-7/8 " oil pipe+base injcction device 10+ centralizer a+2-7/8 ";
7 install fracture well head, set pressing crack construction car group, connect surface line, carry out pressing crack construction after pressure testing is qualified;
8 open wellhead casing pipe gate, with 0.5 ~ 1.0m
3the discharge capacity of/min carries out low replacing, and replaces the liquid measure of a hole volume;
9 is low for after completing, and carry out the perforating job of first paragraph by default sand ratio and design perforation discharge capacity, sand-laden fluid forms high-speed jet by base injcction device 10, penetrates sleeve-penetrating and stratum;
After 10 perforations complete, replace a certain amount of base fluid, close sleeve gate and complete first floor pressing crack construction according to infusion program;
11 first paragraphs add after sand completes, and drop into and low-density ball that second segment sliding sleeve ejector b1 matches, release discharge capacity should control at 1.0m
3within/min, ball falls on the ball seat of sliding sleeve ejector b1, opens sliding sleeve and exposes nozzle, carries out the abrasive perforating pressure break of second segment;
After 12 second segments add a certain amount of base fluid of the complete replacement of sand, the low-density ball that input and the 3rd section of sliding sleeve ejector b2 match, opens the abrasive perforating pressure break that sliding sleeve carries out the 3rd section;
13 pressing crack constructions terminate, open flow discharge opeing.
14 according to above step principle, and can realize the pressing crack construction of nearly 10 sections, after pressing crack construction completes, low-density ball returns out from shaft bottom, catches recovery, realize the without hindrance production of full pit shaft by the ball device of catching being installed on well head.
In sum, content of the present utility model is not limited in the above-described embodiment, and those skilled in the art can propose other embodiment within technological guidance's thought of the present utility model, but this embodiment is all included within scope of the present utility model.
Claims (4)
1. an open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string, it is characterized in that, comprise tail pipe (4), external packer of pipe (5) and multiple sliding sleeves ejector (b) be arranged in described tail pipe (4), base injcction device (10), the upper end of described tail pipe (4) is connected to drilling rod (13) by hanger (6), described external packer of pipe (5) is arranged on described tail pipe (4) outward, for being fixed described tail pipe (4), being positioned at the first sliding sleeve ejector (b) is connected to aboveground by oil pipe (11), connected by oil pipe (11) between adjacent sliding sleeve ejector (b), sliding sleeve ejector (b) being positioned at last position is connected to described base injcction device (10) by oil pipe (11).
2. open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string according to claim 1, it is characterized in that, be provided with a centralizer (a) with each sliding sleeve ejector (b), base injcction device (10) are all corresponding.
3. open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string according to claim 1 and 2, it is characterized in that, described base injcction device (10) is also connected to an one way valve (9) by oil pipe (11), and described one way valve (9) is connected to a guide head (7) by screen casing (8).
4. open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string according to claim 1 and 2, it is characterized in that, the end of described tail pipe (4) is also provided with setting ball seat (3), float shoe (2) and guide shoe (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420575193.9U CN204126624U (en) | 2014-09-30 | 2014-09-30 | Open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string |
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| CN201420575193.9U CN204126624U (en) | 2014-09-30 | 2014-09-30 | Open-hole horizontal well fixed tubular column jetting sectional well completion fracturing string |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267983A (en) * | 2017-07-17 | 2019-01-25 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye |
| CN110671086A (en) * | 2018-07-02 | 2020-01-10 | 中国石油化工股份有限公司 | Composite acid fracturing construction pipe column and application method |
| CN111594123A (en) * | 2020-05-09 | 2020-08-28 | 大庆辰平钻井技术服务有限公司 | Jet staged fracturing method for bare hole immovable pipe column of ultra-short radius horizontal well |
| CN113803016A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Well cementation segmented reconstruction pipe column and method |
| CN117514115A (en) * | 2023-12-18 | 2024-02-06 | 河南省地质研究院 | Completion device and method for fracturing horizontal well based on high-rank coal bed gas |
-
2014
- 2014-09-30 CN CN201420575193.9U patent/CN204126624U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109267983A (en) * | 2017-07-17 | 2019-01-25 | 中国石油化工股份有限公司华北油气分公司石油工程技术研究院 | Horizontal well refracturing device and method based on the complete well of the preset tubing string of naked eye |
| CN110671086A (en) * | 2018-07-02 | 2020-01-10 | 中国石油化工股份有限公司 | Composite acid fracturing construction pipe column and application method |
| CN111594123A (en) * | 2020-05-09 | 2020-08-28 | 大庆辰平钻井技术服务有限公司 | Jet staged fracturing method for bare hole immovable pipe column of ultra-short radius horizontal well |
| CN113803016A (en) * | 2020-06-12 | 2021-12-17 | 中国石油化工股份有限公司 | Well cementation segmented reconstruction pipe column and method |
| CN117514115A (en) * | 2023-12-18 | 2024-02-06 | 河南省地质研究院 | Completion device and method for fracturing horizontal well based on high-rank coal bed gas |
| CN117514115B (en) * | 2023-12-18 | 2024-05-10 | 河南省地质研究院 | Completion device and method for fracturing horizontal well based on high-rank coal bed gas |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210203 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
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| TR01 | Transfer of patent right |