CN203097795U - Three-layer concentric water injection wellhead - Google Patents
Three-layer concentric water injection wellhead Download PDFInfo
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- CN203097795U CN203097795U CN 201220699132 CN201220699132U CN203097795U CN 203097795 U CN203097795 U CN 203097795U CN 201220699132 CN201220699132 CN 201220699132 CN 201220699132 U CN201220699132 U CN 201220699132U CN 203097795 U CN203097795 U CN 203097795U
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- water injection
- big
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Abstract
The utility model provides a three-layer concentric water injection wellhead comprising a small four-way connector, a big four-way connector, a plurality of wellhead valves and a water injection four-way connector. The water injection four-way connector is arranged between a wellhead flange and a big four-way connector, and comprises a body. A through central channel is formed along the axis direction of the body. The inner diameter of the central channel is decreased gradually from the top end of the body to the bottom end. Two drainage grooves reserved along the axis direction on a lower end face of the body. The two drainage grooves are opposite to each other. Two channels are formed along the radial direction, corresponding to the drainage grooves and on the lateral wall of the body; and the inner end of each channel is communicated with the groove bottom of the corresponding drainage groove. The outer lateral face of the body extends outwards to form a pipe portion along the radial direction at the outer end of each channel. A plurality of clamping grooves are distributed along the periphery direction on the outer end face of the body. A plurality of connecting parts are further arranged, and respectively penetrate through the wellhead flange, the clamping grooves of the water injection four-way connector and a flange disc at the upper end of the big four-way connector. An inner oil pipe hanger is hung in the central channel of the water injection four-way connector. The three-layer concentric water injection wellhead is simple in structure; and three separated layer water injection is implemented.
Description
Technical field
The utility model belongs to technical field of petroleum extraction, is a kind of three layers of concentric water injection well that are used for ground regulation and control water injection rate.
Background technology
In the oil field development middle and later periods,, need carry out energy supplement to the stratum for keeping stratum energy, the most conventional arbitrary way is a waterflooding extraction, but in the waterflooding extraction process, owing to have physical difference between layer and the layer, cause that part layer position suction is many, the part layer position absorbs water lacks.Therefore, in order to solve the interlayer water filling difference problem that commingled water injection brings, carried out seperated layer water injection in the oil field.Conventional ground allotment water water injection technology, have simple in structure, the allotment level is really reliable, the characteristics of easy operating.
Yet, common water injection well only can be realized two-layer water filling, this common water injection well sets gradually a little four-way and a big four usually from top to bottom, four ports of little four-way and the port of big four both sides are connected with a head valve respectively, and the head valve that is connected in little four-way lower end port is connected with a wellhead flange, little four-way is connected with the upper end of big four by this wellhead flange, wherein, hang in the inner chamber of big four upper end and fix an outer tubing hanger, be separated with distance between between the lateral surface of this outer tubing hanger lower end and the inwall of big four, in use, be in oil well casing, to be lowered to an oil pipe, and the upper end of this oil pipe is connected in the lower end of outer tubing hanger by box cupling, and then form a ring cavity between the inwall of this oil pipe and oil well casing, utilize this oil pipe to be communicated with again with the inner chamber of little four-way, and form an internal channel, and the inner chamber of the port of big four both sides by big four be connected with this ring cavity, thereby form an outer tunnel, to realize two-layer water filling;
In addition, in present operation, water filling then needs common well head then to need to cooperate and could realize with the downhole measurement adjusting water injection string more than three layers, as Chinese patent application number be 200820111951.6 " concentric double pipe stratified injection water wellhead assembly ", can realize the purpose of three layers of water distribution, but this device is subjected to the well head size restrictions, interior pipe size is less, greatly reduce compliance, in addition, because of structure influence, this well head is higher, cause operation, install, to connect labour intensity bigger, reduced the application value of this instrument; Although dispensing technology such as eccentric, concentric can realize the multilayer water filling, there is pulling allotment water difficulty in it, surveys the problems such as accuracy rate is low of transferring.
Because the defective that above-mentioned known technology exists, the design people develops three layers of concentric water injection well of the present utility model according to the production design experiences of being engaged in this area and association area for many years.
The utility model content
The purpose of this utility model is to be to provide a kind of three layers of concentric water injection well, and it is simple in structure, has simplified tubular column structure, can realize three layers of seperated layer water injection of ground regulation and control water injection rate, increases the flexibility of the multistage water filling allotment of water flooding.
For this reason, the utility model proposes a kind of three layers of concentric water injection well, it includes a little four-way, one big four and a plurality of head valve, four ports of described little four-way and the port of big four both sides are connected with a described head valve respectively, and the described head valve that is connected in described little four-way lower end port further is connected with a wellhead flange by slips, on the described big four, the lower end forms a flange respectively, the upper end of one outer tubing hanger hangs in the inner chamber that is fixed on described big four upper end, be separated with distance between between the lateral surface of its lower end and the inwall of described big four, wherein, described three layers of concentric water injection well comprise in addition:
One water filling four-way, be mounted between described wellhead flange and the described big four, it comprises a columniform body, form a central passage that connects on the described body vertically, the internal diameter of described central passage is diminished to the lower end gradually by described body upper end, be concaved with two drainage troughs on the lower surface of described body vertically, two described drainage troughs are and are oppositely arranged, corresponding two described drainage troughs radially are formed with two passages on the sidewall of described body, the corresponding connection in the inner of each described passage with the bottom land of each described drainage trough, the lateral surface of described body radially stretches out respectively at the place, outer end of each described passage and forms a pipe portion, the lateral wall of described pipe portion is formed with connecting thread, to connect a described head valve, the lateral surface of described body is along circumferentially being distributed with a plurality of draw-in grooves, and each described draw-in groove connects the lateral wall of described body vertically;
Other is provided with a plurality of connectors, each described connector correspondence wears each the described draw-in groove of described wellhead flange, described water filling four-way and the flange of described big four upper end, so that described wellhead flange, described water filling four-way and described big four are connected and fixed, and being hung with an inner oil tube in the central passage of described water filling four-way hangs, the lower end that described inner oil tube is hung is suspended in the inner chamber of outer tubing hanger of described big four, be separated with distance between between the medial surface of its lateral surface and described outer tubing hanger, the notch of each described drainage trough then with the intracavity inter-connection of described outer tubing hanger.
Aforesaid three layers of concentric water injection well, wherein, further be provided with at least two locating holes on the sidewall of described water filling four-way, described locating hole radially extends to described central passage place by the lateral surface of described body, be embedded with positioning piece respectively in each described locating hole, described keeper is threaded with the inside wall of described locating hole, its head end is a taper location division, described taper location division protrudes out in the inner chamber of described central passage, and clip is in the upper surface that described inner oil tube is hung, and the tail end of described keeper then is positioned at outside the lateral surface of described body.
Aforesaid three layers of concentric water injection well, wherein, described keeper comprises a well head jackscrew, an one jackscrew pressure cap and an O grommet type seal circle, described well head jackscrew and described jackscrew pressure cap are embedded from the inside to the outside successively in described locating hole, the head end of described well head jackscrew is a described taper location division, its tail end is connected to the front end of described jackscrew pressure cap, the lateral surface of described jackscrew pressure cap and the inside wall of described locating hole are for being threaded, and its tail end is positioned at outside the lateral surface of described body, and described O shape seal washer then is embedded between the inwall of the lateral surface of described jackscrew pressure cap rear end and described locating hole.
Aforesaid three layers of concentric water injection well, wherein, the lower surface of described body is provided with down annular caulking groove, described annular caulking groove down is coaxial setting with described central passage, and be positioned at outside the notch of two described drainage troughs, the upper surface of described body is provided with annular caulking groove in addition, and described annular caulking groove is relative with the position of described annular caulking groove down, and described annular caulking groove reaches down and is respectively equipped with a ring gasket in the annular caulking groove.
Aforesaid three layers of concentric water injection well wherein, further are embedded with seal washer between the outside that described inner oil tube is hung and the internal face of described central passage.
Three layers of concentric water injection well that the utility model proposes by the combining structure of little four-way, water filling four-way and big four, have constituted a whole set of three layers of concentric water injection well, have solved the difficult problem that common dispensing well head can not be realized three layers of water filling; Compare with existing off-centre, dispensing technology such as concentric, avoided using complicated downhole measurement adjusting water injection string, simplified tubular column structure, improved water-injection efficiency; Three layers of concentric water injection well of the present utility model, simple in structure, easy to operate, make this well head installation aspect, the characteristics that maintenance cost is cheap, can alleviate site operation personnel's labour intensity, be easy to extensively promote in the oil-field flooding project, it is substantial and perfect that the water flooding technology is further obtained.
Three layers of concentric water injection well that the utility model proposes, it can realize three layers of seperated layer water injection by cooperating with existing rig tool, has increased the range of application of the multistage water filling allotment of water flooding; Utilize upper and lower annular caulking groove to carry out metallic seal, can prevent the leakage in the injecting process effectively, improved result of use and operating efficiency.
Description of drawings
Fig. 1 is the user mode reference diagram of three layers of concentric water injection well of the present utility model, and it has shown composition structure of the present utility model;
Fig. 2 is the vertical view of water filling four-way in three layers of concentric water injection well of the present utility model;
Fig. 3 is the sectional view along A-A line among Fig. 2.
The critical element label declaration:
1 little four-way 2 big fours
21,22 flange, 3 head valves
4 slips, 5 wellhead flanges
6 water filling four-ways
61 bodies, 62 central passages
63 drainage troughs, 64 passages
65 pipe portions, 66 draw-in grooves
67 locating holes, 68 keepers
681 taper location divisions, 682 well head jackscrews
683 jackscrew pressure caps, 684 O grommet type seal circles
Annular caulking groove on 691 times annular caulking grooves 692
693 ring gaskets, 7 connectors
81 outer tubing hanger 82 inner oil tubes are hung
9 oil well casings, 91 casing flanges
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast the description of drawings specific embodiment of the present utility model:
Fig. 1 is the user mode reference diagram of three layers of concentric water injection well of the present utility model, and it has shown composition structure of the present utility model; Fig. 2 is the vertical view of water filling four-way in three layers of concentric water injection well of the present utility model; Fig. 3 is the sectional view along A-A line among Fig. 1.
As shown in Figure 1, a kind of three layers of concentric water injection well that the utility model proposes, it includes a little four-way 1, one big four 2 and a plurality of head valve 3, four ports of described little four-way 1 and the port of big four 2 both sides are connected with a described head valve 3 respectively, and the described head valve 3 that is connected in described little four-way 1 lower end port further is connected with a wellhead flange 5 by slips 4, on the described big four 2, the lower end forms a flange 21 respectively, 22, the upper end of one outer tubing hanger 81 hangs and is fixed in the inner chamber of described big four 1 upper end, be separated with distance between between the inwall of the lateral surface of its lower end and described big four 1, described three layers of concentric water injection well include in addition:
One water filling four-way 6, be mounted between described wellhead flange 5 and the described big four 2, please in the lump referring to Fig. 2, Fig. 3, described water filling four-way 6 comprises a columniform body 61, form a central passage 62 that connects on the described body 61 vertically, the internal diameter of described central passage 62 is diminished to the lower end gradually by described body 61 upper ends, makes this central passage form a reverse frustoconic, so that hang other parts; Be concaved with two drainage troughs 63 on the lower surface of described body 61 vertically, two described drainage troughs 63 are and are oppositely arranged, corresponding two described drainage troughs 63 radially are formed with two passages 64 on the sidewall of described body 61, the inner of each described passage 64 and each described drainage trough 63 corresponding connection, the lateral surface of described body 61 radially stretches out respectively at the place, outer end of each described passage 64 and forms a pipe portion 65, the lateral wall of described pipe portion 65 is formed with connecting thread, to connect a described head valve 3, the lateral surface of described body 61 is along circumferentially being distributed with a plurality of draw-in grooves 66, and each described draw-in groove 66 connects the lateral wall of described body 61 vertically;
Other is provided with a plurality of connectors 7 (as fastening bolt), each described connector 7 correspondence wears described wellhead flange 5, the flange 21 of described draw-in groove 66 of each of described water filling four-way 6 and described big four 2 upper ends, with with described wellhead flange 5, described water filling four-way 6 and described big four 2 are connected and fixed, and be embedded with an inner oil tube in the central passage 62 of described water filling four-way 6 and hang 82, described inner oil tube is hung in the inner chamber of outer tubing hanger 81 that 82 lower end is suspended at described big four 2, be separated with distance between between the medial surface of its lateral surface and described outer tubing hanger 81, the notch of each described drainage trough 63 then with the intracavity inter-connection of described outer tubing hanger 81.
Preferred embodiment be, further be provided with at least two locating holes 67 on the sidewall of described water filling four-way 6, described locating hole 67 radially extends to described central passage 62 places by the lateral surface of described body 61, be embedded with positioning piece 68 respectively in each described locating hole 67, described keeper 68 is threaded with the inside wall of described locating hole 67, its head end is a taper location division 681, described taper location division protrudes out in the inner chamber of described central passage 62, and clip hangs 82 upper surface in described inner oil tube, and the tail end of described keeper 68 then is positioned at outside the lateral surface of described body 61.
Wherein, preferred described keeper 68 comprises a well head jackscrew 682, an one jackscrew pressure cap 683 and an O grommet type seal circle 684, described well head jackscrew 682 and described jackscrew pressure cap 683 are embedded from the inside to the outside successively in described locating hole 68, the head end of described well head jackscrew 682 is a described taper location division 681, its tail end is connected to the front end of described jackscrew pressure cap 683, the inside wall of the lateral surface of described jackscrew pressure cap 683 and described locating hole 68 is for being threaded, and its tail end is positioned at outside the lateral surface of described body 61, and described O shape seal washer 684 then is set between the inwall of the lateral surface of described jackscrew pressure cap 683 rear ends and described locating hole 67.
Further, the lower surface of described body 61 is provided with down annular caulking groove 691, described annular caulking groove 691 down is coaxial setting with described central passage 62, and be positioned at outside the notch of two described drainage troughs 63, the upper surface of described body 61 is provided with annular caulking groove 692 in addition, described annular caulking groove 692 is relative with the position of described annular caulking groove 691 down, and described annular caulking groove reaches down and is respectively equipped with a ring gasket 693 in the annular caulking groove.
In addition, for improving sealing performance, further be embedded with the seal washer (not shown) between the outside of described inner oil tube extension 82 and the internal face of described central passage 62.
See also Fig. 1, three layers of concentric water injection well that the utility model proposes, in concrete the enforcement, the utility model with in, outer oil pipe and oil well casing are used, be in inciting somebody to action in advance, outer oil pipe is lowered in the oil well casing 9 in the lump, and inner oil tube 83 is located in the outer oil pipe 84, wherein, the upper end of inner oil tube 83 is connected in the lower end of the inner oil tube extension 82 in the water filling four-way 6 by tubing coupling (indicating among the figure), the upper end of outer oil pipe 84 then is connected in the outer tubing hanger 81 in the described big four 2 by tubing coupling, at last, the flange 22 of the utility model by the big four lower end is mounted on casing flange 91 places that are positioned at the well head place in the oil well casing 9, this assembling process is similar to prior art, does not repeat them here.At this moment, form an outer ring cavity between the inwall of the outside of outer oil pipe 84 and big four 2 and oil well casing 9, the lateral surface of described inner oil tube 83 and outer tubing hanger 81, then form ring cavity between the outer oil pipe 84, in conjunction with aforementioned content, owing to be separated with distance between between the inwall of outer tubing hanger 81 lower ends and big four 2, and be separated with distance between between described inner oil tube extension 82 and the described outer oil pipe 84, make this outer ring cavity be connected with the port of the both sides of described big four 2, and form an outer layer channel, should then communicate with the pipe portion 65 of described water filling four-way 6 both sides by middle ring cavity by the inner chamber and the drainage trough 63 of outer tubing hanger 81, to form a middle level passage, the inner chamber of described inner oil tube 83 and inner oil tube extension 82 then upwards is connected with described little four-way 1 by the inner chamber of wellhead flange 5, and form an internal layer passage, thus, by three layers of concentric water injection well of the present utility model, constitute one or three layers of concentric waterflood path;
During concrete work, the degree of depth according to water filling layers at different levels in the oil well, the length of the inside and outside oil pipe of chosen in advance when assembling, make aforesaid internal layer waterflood path, middle level waterflood path and outer waterflood path corresponding with lower floor, middle level and the upper strata of three grades of water filling layers of down-hole respectively, simultaneously, the port of big four both sides, the port of water filling four-way both sides and the port of little four-way top and both sides are connected in the ground waterflood-transmission line by head valve respectively, so that each water filling layer is carried out the water filling operation.
In addition, for the utility model,, can realize the regulation and control water filling of two-layer ground, have higher flexibility by only using internal layer waterflood path, middle level waterflood path and outer waterflood path wherein any two;
Three layers of concentric water injection well that the utility model proposes by the combining structure of little four-way, water filling four-way and big four, have constituted a whole set of three layers of dispensing well head, have solved the difficult problem that common dispensing well head can not be realized three layers of water filling; Compare with existing off-centre, dispensing technology such as concentric, avoided using complicated downhole measurement adjusting water injection string, simplified tubular column structure, improved water-injection efficiency; Three layers of concentric water injection well of the present utility model, simple in structure, easy to operate, make this well head installation aspect, the characteristics that maintenance cost is cheap, can alleviate site operation personnel's labour intensity, be easy to extensively promote in the oil-field flooding project, it is substantial and perfect that the water flooding technology is further obtained.
Three layers of concentric water injection well that the utility model proposes, it can realize three layers of seperated layer water injection by cooperating with existing rig tool, has increased the range of application of the multistage water filling allotment of water flooding; Utilize upper and lower annular caulking groove to carry out metallic seal, can prevent the leakage in the injecting process effectively, improved result of use and operating efficiency.
The above only is the schematic specific embodiment of the utility model, is not in order to limit scope of the present utility model.Any those skilled in the art, equivalent variations of having done under the prerequisite that does not break away from design of the present utility model and principle and modification all should belong to the scope that the utility model is protected.
Claims (6)
1. three layers of concentric water injection well, it includes a little four-way, one big four and a plurality of head valve, four ports of described little four-way and the port of big four both sides are connected with a described head valve respectively, and the described head valve that is connected in described little four-way lower end port further is connected with a wellhead flange by slips, on the described big four, the lower end forms a flange respectively, the upper end of one outer tubing hanger hangs in the inner chamber that is fixed on described big four upper end, be separated with distance between between the lateral surface of its lower end and the inwall of described big four, it is characterized in that described three layers of concentric water injection well comprise in addition:
One water filling four-way, be mounted between described wellhead flange and the described big four, it comprises a columniform body, form a central passage that connects on the described body vertically, the internal diameter of described central passage is diminished to the lower end gradually by described body upper end, be concaved with two drainage troughs on the lower surface of described body vertically, two described drainage troughs are and are oppositely arranged, corresponding two described drainage troughs radially are formed with two passages on the sidewall of described body, the corresponding connection in the inner of each described passage with the bottom land of each described drainage trough, the lateral surface of described body radially stretches out respectively at the place, outer end of each described passage and forms a pipe portion, the lateral wall of described pipe portion is formed with connecting thread, to connect a described head valve, the lateral surface of described body is along circumferentially being distributed with a plurality of draw-in grooves, and each described draw-in groove connects the lateral wall of described body vertically;
Other is provided with a plurality of connectors, each described connector correspondence wears each the described draw-in groove of described wellhead flange, described water filling four-way and the flange of described big four upper end, so that described wellhead flange, described water filling four-way and described big four are connected and fixed, and being hung with an inner oil tube in the central passage of described water filling four-way hangs, the lower end that described inner oil tube is hung is suspended in the inner chamber of outer tubing hanger of described big four, be separated with distance between between the medial surface of its lateral surface and described outer tubing hanger, the notch of each described drainage trough then with the intracavity inter-connection of described outer tubing hanger.
2. three layers of concentric water injection well as claimed in claim 1, it is characterized in that, further be provided with at least two locating holes on the sidewall of described water filling four-way, described locating hole radially extends to described central passage place by the lateral surface of described body, be embedded with positioning piece respectively in each described locating hole, described keeper is threaded with the inside wall of described locating hole, its head end is a taper location division, described taper location division protrudes out in the inner chamber of described central passage, and clip is in the upper surface that described inner oil tube is hung, and the tail end of described keeper then is positioned at outside the lateral surface of described body.
3. three layers of concentric water injection well as claimed in claim 2, it is characterized in that, described keeper comprises a well head jackscrew, an one jackscrew pressure cap and an O grommet type seal circle, described well head jackscrew and described jackscrew pressure cap are embedded from the inside to the outside successively in described locating hole, the head end of described well head jackscrew is a described taper location division, its tail end is connected to the front end of described jackscrew pressure cap, the lateral surface of described jackscrew pressure cap and the inside wall of described locating hole are for being threaded, and its tail end is positioned at outside the lateral surface of described body, and described O shape seal washer then is embedded between the inwall of the lateral surface of described jackscrew pressure cap rear end and described locating hole.
4. as each described three layers of concentric water injection wells in the claim 1 to 3, it is characterized in that, the lower surface of described body is provided with down annular caulking groove, described annular caulking groove down is coaxial setting with described central passage, and be positioned at outside the notch of two described drainage troughs, the upper surface of described body is provided with annular caulking groove in addition, and described annular caulking groove is relative with the position of described annular caulking groove down, and described annular caulking groove reaches down and is respectively equipped with a ring gasket in the annular caulking groove.
5. three layers of concentric water injection well as claimed in claim 4 is characterized in that, further are embedded with seal washer between the outside that described inner oil tube is hung and the internal face of described central passage.
6. three layers of concentric water injection well as claimed in claim 1 is characterized in that, further are embedded with seal washer between the outside that described inner oil tube is hung and the internal face of described central passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220699132 CN203097795U (en) | 2012-12-17 | 2012-12-17 | Three-layer concentric water injection wellhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220699132 CN203097795U (en) | 2012-12-17 | 2012-12-17 | Three-layer concentric water injection wellhead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203097795U true CN203097795U (en) | 2013-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220699132 Expired - Fee Related CN203097795U (en) | 2012-12-17 | 2012-12-17 | Three-layer concentric water injection wellhead |
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| CN (1) | CN203097795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818967A (en) * | 2015-04-13 | 2015-08-05 | 南京伟业机械有限公司 | Separate injector for water injection well mouth and three-pipe water injection well mouth device using separate injector |
-
2012
- 2012-12-17 CN CN 201220699132 patent/CN203097795U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104818967A (en) * | 2015-04-13 | 2015-08-05 | 南京伟业机械有限公司 | Separate injector for water injection well mouth and three-pipe water injection well mouth device using separate injector |
| CN104818967B (en) * | 2015-04-13 | 2018-01-05 | 南京伟业机械有限公司 | Water injection well dispenser and the three pipe Water injection well head devices using the dispenser |
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Granted publication date: 20130731 Termination date: 20211217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |