CN201225121Y - Oil gas well selective completion tool - Google Patents
Oil gas well selective completion tool Download PDFInfo
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- CN201225121Y CN201225121Y CNU2008201090861U CN200820109086U CN201225121Y CN 201225121 Y CN201225121 Y CN 201225121Y CN U2008201090861 U CNU2008201090861 U CN U2008201090861U CN 200820109086 U CN200820109086 U CN 200820109086U CN 201225121 Y CN201225121 Y CN 201225121Y
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- gas well
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Abstract
The utility model relates to a selective completion tool for an oil and gas well, which is applied to a completion pipe string in a well of oil, natural gas and coal bed gas. The selective completion tool is characterized in that a cylindrical moving sleeve is arranged in an outer casing formed by an upper body, a middle body and a lower body, and sealing assemblies are respectively arranged among the upper body, the lower body and the middle body and outside the moving sleeve; step holes in the upper body and the lower body respectively form spacing steps, the moving sleeve can axially slide in the step holes between the upper body and the lower body, and two spacing grooves are also arranged in the lower body; an oblong through hole is arranged in the middle of the middle body, and an oblong circulating hole and an elastic claw are arranged on the moving sleeve. The utility model has the advantages that communication and the isolation of the inner circular space and the outer circular space of the completion pipe string can be realized to satisfy the requirements for the selective exploitation of production layers. According to the practical distribution situations and the exploitation requirements of the production layers of the oil and gas well, the operation technologies are realized, such as selective isolation, packing, exploitation, and the like on a plurality of layers or in a plurality of section of a single layer in a horizontal well with a single wellbore.
Description
Technical field
The present invention relates to oil, natural gas and coal-bed gas exploitation technical field.Be particularly related to a kind of oil gas well selective completion tool.
Background technology
Along with domestic each oil field progressively enters the middle and later periods of exploration and development, the difficulty and the cost of exploration and development significantly increase, and study and use stable yields yield-increasing technique and measure efficiently, become the road that must walk of each oil field development and growth.Domestic and international research and application practice prove, horizontal well technology can increase the length of well in producing zone and the drainage area of payzone widely than straight well, improve oil and gas production, slow down the fltting speed of water awl and gas coning, its exploration and development effect is equivalent to 3～6 times of straight well, therefore, recent years, domestic and international horizontal well drilling quantity rolled up.
Though horizontal well drilling technology develops comparative maturity, the horizontal well completion mode then develops slower, and the horizontal well completion mode mainly contains at present: barefoot completion, tail pipe perforation completion and screen casing+open hole packer completion.The barefoot completion mode is the simplest and completion mode cheaply, but since himself application limitation and defective seldom use; Tail pipe perforation completion mode is the completion mode of at present domestic the most extensive and main use, this mode helps avoiding intermediate water, Di Shui, pneumatic jack, but carrying out horizontal section segmenting perforating, formation testing, notes are adopted and carry out selective stimulation, but output is lower, can not give full play to horizontal well capacity advantage; Screen casing+open hole packer completion mode had both played the effect of barefoot completion, prevented the effect that pit shaft is stopped up in the bore hole cave-in again, play simultaneously the effect of sand control to a certain extent, and enough circulation areas can be provided, reservoir is not subjected to the pollution of cement paste, can prevent borehole collapse, cost is relatively low, can bring into play production capacity to greatest extent, but, well not solve processing method if payzone changes as after the complex situations such as water awl.That's about the size of it for each oilfield horizontal well completion situation of China at present, many for horizontal well at pay interval, have the required single oil pipe selectivity of the multilayer completion technique of complex reservoir exploitation of independent separately oil gas top and oil-water interfaces again, then also do not have series of solutions.And external packer of pipe+selective completion tool selectivity completion method can solve these difficult problems.
External packer of pipe+selective completion tool optional water horizontal well completion method combines the advantage of tail pipe perforation completion and screen casing+two kinds of completion methods of open hole packer completion, output is high and can take the several work method to transform payzone, is a kind of advanced completion method.This selectivity completion method is being used by instruments such as the selective completion tool that can carry out switching manipulation on ground and high performance external packer of pipe and extension hanger and equipment; realize the single oil pipe selectivity of multilayer well-completing process; not only can prevent that formation water from invading and the formation testing of branch interval; recover the oil; it is big also to have the barefoot completion seepage area simultaneously; the degree of perfection advantages of higher; not only can overcome the defective that the cementing completion technique exists; can realize the interval packing well again; reach multilayer or the packing of individual layer complex reservoir selective layering under the single borehole condition; exploitation; shutoff and operation are to improving the oil-gas reservoir production efficiency and protecting oil-gas reservoir significant.
Summary of the invention
The purpose of this utility model is: a kind of oil gas well selective completion tool is provided, by with being used of completion tools such as external packer of pipe, can be according to oil gas well payzone distribution situation and exploitation needs, be lowered to selective completion tool at payzone, packing payzone and non-payzone selectively, and by using supporting switching manipulation tool applications, the realization selective completion tool opens or closes, thereby realize selective layering packing, exploitation, shutoff and the operation of corresponding payzone, improve oil, natural gas or coal bed gas well exploitation benefit.
The technical solution of the utility model is: oil gas well selective completion tool, form by upper body, movable sleeve, last seal group, middle body, lower seal group and following body, it is characterized in that: the upper body upper end has oil casing threaded, the upper body lower end middle body that is threaded, middle body is connected with following body by screw thread again, form the shell of selective completion tool, there is the cylindrical shape movable sleeve in portion in the enclosure, in seal group between upper body and the middle body and on the outside of movable sleeve has; The lower seal group is being arranged between body and the middle body and in the outside of movable sleeve down, be sealed and matched between the shell that movable sleeve and upper body, middle body and following body are formed, there is shoulder hole to form limited step in upper body and the following body respectively, movable sleeve can endwisely slip in the shoulder hole between upper body and the following body, also has two stopper slots in the following body; There is the Long Circle opening at middle body middle part; Long Circle circulation cycle hole and elastic claw are arranged on the movable sleeve.
The Long Circle opening at body middle part axially can be single row or multiple rows in described, and the quantity of every current drainage through hole is 4-16, and through hole radially evenly distributes, and the through-hole diameter at middle body middle part is between the 10-50 millimeter.
Long Circle circulation cycle hole on the described movable sleeve is in the upper end of movable sleeve, the design of circulation cycle hole is corresponding with middle bulk flow through hole, can be single row or multiple rows, and quantity is 4-32, the circulation cycle hole evenly distributes, and the circulation cycle bore dia on the movable sleeve is between the 10-50 millimeter.
4-8 on a movable sleeve elastic claw radially evenly distributes; be higher than the movable sleeve external diameter during elastic tip free state of elastic claw; after stressed; it is recoverable to; its effect is to match with two locating slots of following body interior; movable sleeve can be locked and this oil gas well selective completion tool opens and closes two positions, guarantee that movable sleeve only under certain external force effect, can open and close.
The internal diameter of described upper body and following body interior limited step is less than the external diameter of movable sleeve.Limited step is used for the distance that the restraint cover moves up.
For guaranteeing that selective completion tool opens and closes the reliability of operation; the design of described inner body wall down has two detents; the effect of two locating slots is to cooperate with elastic claw cover on the movable sleeve; movable sleeve can be locked with this oil gas well selective completion tool open and close two positions; guarantee that movable sleeve only under certain external force effect, can open and close.
In order to ensure the state reliability of the opening and closing of selective completion tool, describedly go up the V-type combination sealing that seal group and lower seal group adopt, and between movable sleeve and middle body, 0 RunddichtringO is arranged.
In order to adapt to the needs of selectivity completion practice different size hole diameter, the external diameter of upper body, middle body and following body is between 50-300 millimeters.
The beneficial effects of the utility model are: oil gas well selective completion tool, can realize oil gas well selectivity completion purpose, reach and overcome the defective that the cementing completion technique exists, realize the interval packing well, reach multilayer or the packing of individual layer complex reservoir selective layering, exploitation, shutoff and operation under the single borehole condition, improve oil-gas reservoir exploitation benefit.And have following characteristics:
1. oil gas well selectivity instrument is gone into well easily, reliably in well.It goes into well with completion tubular column, and the instrument external diameter is not more than the outer warp of corresponding external packer of pipe, and the instrument that can guarantee is gone into well smoothly.
2. adopt the V-type combination sealing inside and outside the oil gas well selectivity instrument, sealing performance is reliable, the life-span is long, movable sleeve moves axially smooth and easy.
3. oil gas well selectivity instrument outer body and movable sleeve design the logical circulation port of corresponding axial many Volleyball Associations respectively, in the time of can satisfying selective completion tool and open, and the needs of corresponding payzone high-efficiency mining, pressure break or acidifying.
4. simple, the construction technology safety of oil gas well selectivity instrument overall structure.Oil gas well selectivity instrument is to be serially connected on the completion tubular column, and its external diameter is not more than the external diameter of supporting packer, and it is easy to go into the well process, and switching manipulation is reliable easily.
5. oil gas well selectivity instrument can be connected in series a plurality ofly in tubing string arbitrarily, can optionally open or close operation by supporting switching tools, and not interact, and can satisfy any selectivity exploitation of each payzone section or operation.
Description of drawings
Fig. 1 is the generalized section of the utility model oil gas well selectivity instrument closed condition.
Fig. 2 is the generalized section of the utility model oil gas well selectivity TO state.
Among the figure, 1. upper body, 2. movable sleeve is 3. gone up seal group, 4. in body, 5. the lower seal group is 6. descended body.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and the specific embodiments.
Embodiment: consult Fig. 1.An oil gas well selective completion tool is made up of upper body 1, movable sleeve 2, last seal group 3, middle body 4, lower seal group 5 and following body 6.The external diameter of upper body 1, middle body 4 and following body 6 is 130 millimeters.
There is a cylindrical shape movable sleeve 2 in portion in the enclosure, and the external diameter of movable sleeve 2 is 99 millimeters.Long Circle circulation cycle hole and elastic claw are arranged on the movable sleeve 2.Circulation cycle hole on the movable sleeve 2 is in the upper end of movable sleeve 2, and quantity is 16, and the circulation cycle hole evenly distributes, and the circulation cycle bore dia on the movable sleeve 2 is 38 millimeters.Elastic claw on the movable sleeve 2 radially evenly distributes, and is higher than the movable sleeve external diameter during elastic tip free state of elastic claw, stressed after, it is recoverable to.
In seal group 3 between upper body 1 and the middle body 3 and on the outside of movable sleeve 2 has; Between body 6 and the middle body 3 and in the outside of movable sleeve 2 lower seal group 5 is being arranged down.What last seal group 3 and lower seal group 5 adopted respectively is a V-type combination sealing, and an O RunddichtringO is arranged between movable sleeve 2 and middle body 4.Be sealed and matched between the shell that movable sleeve 2 and upper body 1, middle body 4 and following body 6 are formed.
Have shoulder hole to form limited step in upper body 1 and the following body 6 respectively, movable sleeve 2 can endwisely slip in the shoulder hole between upper body 1 and the following body 6.The internal diameter of upper body 1 and following body 6 inner limited steps is 88 millimeters, less than the external diameter of movable sleeve 2.Limited step is used for restraint cover 2 distances that move up.
Also have two stopper slots in the following body 6; Following body 6 inwalls design has two detents; the effect of two locating slots is to cooperate with elastic claw cover on the movable sleeve 2; movable sleeve 2 can be locked with this oil gas well selective completion tool open and close two positions; guarantee that movable sleeve 2 only under certain external force effect, can open and close.
Operating principle: according to the needs of the distribution of oil gas well payzone or same payzone segmentation exploitation, the relation of mounting pipe external packer packing connects oil gas well selectivity well-completing process tubing string between, the payzone corresponding with payzone according to oil gas well selective completion tool.Pairing selectivity well-completing process tubing string once is from top to bottom: guide shoe, blind tail pipe, external packer of pipe, selective completion tool, external packer of pipe, selective completion tool, external packer of pipe, blind tail pipe, extension hanger etc., wherein the quantity of the blind tail pipe of each section is decided according to the actual needs of payzone.All be in closed condition when the oil gas selective completion tool is gone into well, consult Fig. 1.When selectivity well-completing process tubing string arrives design attitude down, job requirements according to external packer of pipe, soft-shelled turtle is pressed and sets whole external packer of pipe in the completion tubular column, sit and hang extension hanger, trip out the selectivity completion tubular column and send into drill string, this moment, all payzones all were in closed condition, then, be lowered to the working string of band selective completion tool switching manipulation instrument, needs according to each payzone exploitation, selective opening (consulting Fig. 2) or close the not selective completion tool of corresponding payzone, thus realize the selectivity exploitation or the operation of payzone, reach the purpose that improves oil gas well mining efficient.
Claims (8)
1, a kind of oil gas well selective completion tool, form by upper body (1), movable sleeve (2), last seal group (3), middle body (4), lower seal group (5) and following body (6), it is characterized in that: upper body (1) upper end has oil casing threaded, upper body (1) the lower end middle body (3) that is threaded, middle body (3) is connected with following body (6) by screw thread again, form the shell of selective completion tool, there is cylindrical shape movable sleeve (2) in portion in the enclosure, between upper body (1) and middle body (3) and in the outside of movable sleeve (2) last seal group (3) is arranged; Lower seal group (5) is being arranged between body (6) and the middle body (3) and in the outside of movable sleeve (2) down, be sealed and matched between the shell that movable sleeve (2) and upper body (1), middle body (4) and following body (6) are formed, there is shoulder hole to form limited step in upper body (1) and the following body (6) respectively, movable sleeve (2) can endwisely slip in the shoulder hole between upper body (1) and the following body (6), also has two stopper slots in the following body (6); There is the Long Circle opening at middle body (4) middle part; Movable sleeve has Long Circle circulation cycle hole and elastic claw on (2).
2, oil gas well selective completion tool according to claim 1, it is characterized in that: the Long Circle opening at body (4) middle part axially can be single row or multiple rows in described, the quantity of every current drainage through hole is 4-16, through hole radially evenly distributes, and the through hole footpath at middle body (4) middle part is between the 10-50 millimeter.
3, oil gas well selective completion tool according to claim 1, it is characterized in that: the Long Circle circulation cycle hole on the described movable sleeve (2) is in the upper end of movable sleeve (2), the design of circulation cycle hole is corresponding with middle body (4) opening, can be single row or multiple rows, quantity is 4-32, the circulation cycle hole evenly distributes, and the circulation cycle bore dia on the movable sleeve (2) is between the 10-50 millimeter.
4, oil gas well selective completion tool according to claim 1 is characterized in that: 4-8 elastic claw on the movable sleeve (2) radially evenly distributes, and is higher than the movable sleeve external diameter during elastic tip free state of elastic claw, stressed after, it is recoverable to.
5, oil gas well selective completion tool according to claim 1 is characterized in that: the internal diameter of described upper body (1) and the inner limited step of following body (6) is less than the external diameter of movable sleeve (2).
6, according to claim 1,2,3,4 or 5 described oil gas well selective completion tools, it is characterized in that: it is to cooperate with elastic claw on the movable sleeve (2) that described down body (6) inwall design has two detents, the effect of two locating slots.
7, according to claim 1,2,3,4 or 5 described oil gas well selective completion tools, it is characterized in that: the described V-type combination sealing of going up seal group (3) and lower seal group (5) employing, and between movable sleeve (2) and middle body (4), the O RunddichtringO is arranged.
8, according to claim 1,2,3,4 or 5 described oil gas well selective completion tools, it is characterized in that: the external diameter of upper body (1), middle body (4) and following body (6) is between 50-300 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201090861U CN201225121Y (en) | 2008-07-08 | 2008-07-08 | Oil gas well selective completion tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201090861U CN201225121Y (en) | 2008-07-08 | 2008-07-08 | Oil gas well selective completion tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201225121Y true CN201225121Y (en) | 2009-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201090861U Expired - Lifetime CN201225121Y (en) | 2008-07-08 | 2008-07-08 | Oil gas well selective completion tool |
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| Country | Link |
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| CN (1) | CN201225121Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296978A (en) * | 2011-07-29 | 2011-12-28 | 安阳鑫龙煤业(集团)有限责任公司 | Coal-face flooding hole packer |
| CN110924903A (en) * | 2019-12-06 | 2020-03-27 | 中国石油集团渤海钻探工程有限公司 | Selective plugging process pipe column for screen pipe well completion |
| CN111188586A (en) * | 2018-11-15 | 2020-05-22 | 中国石油化工股份有限公司 | Electric control piston type while-drilling bypass valve |
-
2008
- 2008-07-08 CN CNU2008201090861U patent/CN201225121Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296978A (en) * | 2011-07-29 | 2011-12-28 | 安阳鑫龙煤业(集团)有限责任公司 | Coal-face flooding hole packer |
| CN111188586A (en) * | 2018-11-15 | 2020-05-22 | 中国石油化工股份有限公司 | Electric control piston type while-drilling bypass valve |
| CN110924903A (en) * | 2019-12-06 | 2020-03-27 | 中国石油集团渤海钻探工程有限公司 | Selective plugging process pipe column for screen pipe well completion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM GROUP POHAI DRILLING ENGINEERING C Free format text: FORMER OWNER: INST OF DRILLING-WELL TECHNOLOGY, HUABEI PETROLEUM ADMINISTRATION Effective date: 20090508 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090508 Address after: No. 106 Huang Hai Road, Tianjin economic and Technological Development Zone, post code: 300457 Patentee after: CNPC Bohai Drilling Engineering Co., Ltd. Address before: Research Institute of Huabei Petroleum Drilling Technology Institute, Hebei, Renqiu 062552, China Patentee before: Inst of Drilling-Well Technology, Huabei Petroleum Administration |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090422 |