CN207568539U - Without wellbore gas drilling wellhead assembly - Google Patents
Without wellbore gas drilling wellhead assembly Download PDFInfo
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- CN207568539U CN207568539U CN201721514162.2U CN201721514162U CN207568539U CN 207568539 U CN207568539 U CN 207568539U CN 201721514162 U CN201721514162 U CN 201721514162U CN 207568539 U CN207568539 U CN 207568539U
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Abstract
The utility model discloses a kind of no wellbore gas drilling wellhead assembly, which includes support sealing drum, sealing shell body and rotary sealing appts；Sealing drum top is supported to be equipped with convex edge, convex edge is to divide into external screw thread；Support sealing drum is connect with sealing shell body by flange seal；The side wall of sealing shell body is equipped with bypass, and inner wall is equipped with step, and top is spirally connected upper cover；The upper and lower seal of rotary sealing appts is tightly connected, inside formation cavity volume, rotating cylinder in installation, the bottom fixing glue core of interior rotating cylinder, outside installation thrust bearing；Rotary sealing appts are sealingly mounted in sealing shell body；When the upper cover of sealing shell body is screwed onto on sealing shell body, the upper seal of rotary sealing appts, the position of lower seal are fixed.The device establishes closing wellhead assembly under no borehole condition, bores a layer surface layer of turning up the soil suitable for shallow-layer low-pressure gas and establish wellbore using supporting sealing drum insertion stratum and insulating near surface stratum.
Description
Technical field
The utility model is related to the gas drillings in oil drilling technology field, and in particular to a kind of no wellbore gas drilling well
Mouth device.
Background technology
Air drilling is using gas as the circulatory mediator in pit shaft, Special wellhead device closing well head, to prevent at a high speed
It returns out gas entrainment landwaste to discharge without control in well site, after gas returns out ground, sealing and circulating is discharged in the pipeline of ground, shaft bottom pressure
Power is far smaller than the liquid column hydrostatic pressure of conventional liq drilling fluid.Air drilling can not only save the cost of drilling fluid, also
It can thoroughly solve the problems, such as well drilling strata dropping, improve rate of penetration.
At present, air drilling is only used for being equipped with the follow-up well section of Special wellhead device after setting of casing is cemented the well.But
It is that certain stratum are bored will encounter serious leakage problem when turning up the soil layer surface layer, and drilling fluid leaks into stratum, not only influences normal
Drilling, and because stratum skin depth it is shallow, the drilling fluid for leaking into stratum can also contaminated soil and water flooding.If using
Air drilling can solve the problems, such as the leakage of stratum surface hole drilling, but because stratum is not bored out also, without wellbore, more
There is no tripping in casing cementing, can not well head be installed so that gas drilling can not be carried out.
Invention content
The utility model provides a kind of no wellbore gas drilling wellhead assembly, solves gas drilling and bores layer surface layer of turning up the soil
Technical bottleneck using supporting sealing drum insertion stratum and insulating the nearly well head borehole wall, closing well head is established under no borehole condition, is fitted
A layer surface layer of turning up the soil, which is bored, for shallow-layer low-pressure gas establishes wellbore.
For this purpose, the technical solution of the utility model is as follows：
A kind of no wellbore gas drilling wellhead assembly, including support sealing drum, sealing shell body and rotary sealing appts；
For the ontology of the support sealing drum for tubular, top is equipped with convex edge, and the ontology below the convex edge is equipped with outer spiral shell
Line；
The top of the support sealing drum is connect with the bottom of the sealing shell body by flange seal；Outside the sealing
The side wall of housing is equipped with bypass, for connecting exhaust line；The inner wall of the sealing shell body is equipped with step, and top is spirally connected
Upper cover；The middle part of the upper cover is equipped with through hole；
The rotary sealing appts include upper seal, lower seal, interior rotating cylinder, glue core and thrust bearing；On described
Seal and lower seal are tightly connected, and inside forms cavity volume；The interior rotating cylinder includes two sections of integrally formed cylinders, diameter
One section of big cylinder is mounted in the cavity volume, and is formed with boss on its side wall；One section of small cylinder of diameter extends described
Cavity volume, bottom are fixedly installed glue core；The interior rotating cylinder is all provided with the surface that the upper seal, lower seal are in contact
It is equipped with sealing ring；There are two the thrust bearings, is separately mounted to the both sides up and down of the boss, for preventing the interior rotation
Cylinder is subjected to displacement when rotated；The glue core is hollow structure, can be with forming sealing structure across its drill string obvolvent；
The rotary sealing appts are mounted in the sealing shell body on the step of wall, and are equipped in contact position close
Seal washer；When the upper cover of the sealing shell body is screwed onto on the sealing shell body, the upper sealing of the rotary sealing appts
Body, lower seal position fix.
Further, oil filler point is additionally provided on the upper seal of the rotary sealing appts, the oil filler point stops with described
The installation site of thrust bearing communicates.
Further, it is additionally provided with boss I on the outer wall of the lower seal；It is installed between boss I and support sealing drum close
Seal.
Further, the outer surface on the downside of the support sealing drum is the conical surface, convenient for creeping into stratum.
Further, the support rectangular triangle in externally threaded section of sealing drum or class right angled triangle, right-angle side
In upside.
Further, it is all provided on the top surface of the upper cover of the upper seal of the rotary sealing appts and the sealing shell body
Hanging ring is equipped with, facilitates installation, dismounting.
Further, the outer wall of the sealing shell body is also vertically equipped with multiple mounting holes；Wirerope can be used in use
Across mounting hole, sealing shell body is fixed on rig floor.
A kind of method that no wellbore gas drilling wellhead assembly bores layer surface layer of turning up the soil, includes the following steps：
1) the sealing shell body of the no wellbore gas drilling wellhead assembly is removed from support sealing drum；
Installation pipe nipple connect with drill string, the bottom for installing pipe nipple circumferentially arranged with installing plate, the installing plate and
Support sealing drum passes through flanged joint；
Support sealing drum lower end, which is placed in, needs the position of bored borehole, and control drill string presses to support sealing drum, rotates drill string,
Support sealing drum is driven to pierce stratum, until when the convex edge of support sealing drum touch stratum, stop operating drilling rod；
2) installation pipe nipple is removed, sealing shell body is connected to flange on support sealing drum, the no wellbore gas is installed
Body wellhead for drilling；
3) drill string is passed through into rotary sealing appts, glue core obvolvent drill string forms sealing structure；Drill string installs drill bit, then
By drill string tripping in sealing shell body, when rotary sealing appts reach its installation site in sealing shell body, fixed cover,
Drill bit is transferred to the landscape position supported in sealing drum, starts to creep into, carries out gas drilling, establish wellbore to designing well depth；
4) it pulls out of hole, dismantles the no wellbore gas drilling wellhead assembly, carry out subsequent job.
Further, the upside of the installing plate of the installation pipe nipple is circumferentially arranged multiple securing plates.
This can realize that gas drilling bores a layer surface layer of turning up the soil under no borehole condition without wellbore gas drilling wellhead assembly；It utilizes
Gas drilling can effectively solve the problems, such as that stratum surface layer is missed, and improve rate of penetration, environmental protection.
Description of the drawings
Fig. 1 is the diagrammatic cross-section of no wellbore gas drilling wellhead assembly provided by the utility model；
Fig. 2 is the profile of rotary sealing appts；
Fig. 3 is the profile that rotary sealing appts are mounted in sealing shell body；
Fig. 4 a are the profile for installing pipe nipple；
Fig. 4 b are the vertical view for installing pipe nipple；
Fig. 5 is the diagrammatic cross-section that sealing drum is supported to pierce stratum；
Fig. 6 is the schematic diagram that layer of turning up the soil is bored using no wellbore gas drilling wellhead assembly progress gas drilling.
Specific embodiment
The technical solution of the utility model is described in detail below in conjunction with the drawings and specific embodiments.
As shown in Figures 1 to 3, a kind of no wellbore gas drilling wellhead assembly, including support sealing drum 1,2 and of sealing shell body
Rotary sealing appts 3；
The ontology 101 for supporting sealing drum 1 is tubular, and top is equipped with convex edge 102, and convex edge is set on the ontology 101 below 102
There is external screw thread, it is preferable that the support rectangular triangle in externally threaded section of sealing drum 1 or class right angled triangle, right-angle side is upper
Side；It is preferred that the outer surface of 1 downside of support sealing drum is the conical surface, convenient for creeping into stratum；
The top and the bottom of sealing shell body 2 for supporting sealing drum 1 are tightly connected by flange 4；The side of sealing shell body 2
Wall is equipped with bypass 201, for connecting exhaust line；The inner wall of sealing shell body 2 is equipped with step, and top is spirally connected upper cover 202；
The middle part of upper cover 202 is equipped with through hole 203；
Rotary sealing appts 3 include upper seal 301, lower seal 302, interior rotating cylinder 303, glue core 304 and thrust shaft
Hold 305；Upper seal 301 and lower seal 302 are tightly connected, and inside forms cavity volume；Interior rotating cylinder 303 includes integrally formed
Two sections of cylinders, one section of big cylinder of diameter are mounted in cavity volume, and be formed with boss on its side wall；One section of small cylinder of diameter prolongs
Cavity volume is stretched out, bottom is fixedly installed glue core 304；Interior rotating cylinder 303 is in contact with upper seal 301, lower seal 302
Surface is both provided with sealing ring；There are two thrust bearings 305, is separately mounted to the both sides up and down of boss, for preventing interior rotation
Cylinder 303 is subjected to displacement when rotated；Glue core 304 is hollow structure, can be with forming sealing structure across its 6 obvolvent of drill string, such as
Shown in Fig. 2；
Rotary sealing appts 3 are mounted on the step of 2 inner wall of sealing shell body, and are equipped with gasket in contact position
Circle；When the upper cover 202 of sealing shell body 2 is screwed onto on sealing shell body 2, the upper seal 301 of rotary sealing appts 3, under it is close
The position of envelope body 302 is fixed, as shown in Figure 3.
It is preferred that the outer wall of sealing shell body 2 is also vertically equipped with multiple mounting holes 204；It can be worn in use with wirerope
Mounting hole 204 is crossed, sealing shell body 2 is fixed on rig floor 7.
In addition, it is respectively provided on the top surface of the upper cover 202 of the upper seal 301 and sealing shell body 2 of rotary sealing appts 3
There is hanging ring, facilitate installation, dismounting.
As one embodiment of the utility model, oil filler point is additionally provided on the upper seal 301 of rotary sealing appts 3
306, oil filler point 306 is communicated with the installation site of thrust bearing 305.
As another embodiment of the utility model, boss I is additionally provided on the outer wall of lower seal 302；Boss I and branch
Sealing ring is installed between support sealing drum 1.
A kind of method that no wellbore gas drilling wellhead assembly bores layer surface layer of turning up the soil, includes the following steps：
1) the sealing shell body 2 of no wellbore gas drilling wellhead assembly is removed from support sealing drum 1；
Installation pipe nipple 5 with drill string 6 is connect, the bottom of pipe nipple 5 is installed circumferentially arranged with installing plate 501, installing plate 501 and
Support sealing drum 1 passes through flanged joint；
1 lower end of support sealing drum, which is placed in, needs the position of bored borehole, and control drill string 6 presses to support sealing drum 1, and rotation is bored
Column 6 drives support sealing drum 1 to pierce stratum, until when the convex edge 102 of support sealing drum 1 touch stratum, stop operating drilling rod 6, such as
Shown in Fig. 5；
2) installation pipe nipple 5 is removed, sealing shell body 2 is connected to flange on support sealing drum 1, no wellbore gas is installed
Wellhead for drilling；
3) drill string 6 is passed through into rotary sealing appts 3,304 obvolvent drill string 6 of glue core forms sealing structure；Drill string installs drill bit
8, then by 6 tripping in sealing shell body 2 of drill string, when rotary sealing appts 3 reach its installation site in sealing shell body 2
When, fixed cover 202, decentralization drill bit to the landscape position supported in sealing drum 1 starts to creep into, carries out gas drilling, establish well
Eye extremely design well depth；As shown in Figure 6；
4) it pulls out of hole, dismantles no wellbore gas drilling wellhead assembly, carry out subsequent job.
Further, the upside of the installing plate 501 of installation pipe nipple 5 is circumferentially arranged multiple securing plates 502.
This can realize that gas drilling bores a layer surface layer of turning up the soil under no borehole condition without wellbore gas drilling wellhead assembly；It utilizes
Gas drilling can effectively solve the problems, such as that stratum surface layer is missed, and improve rate of penetration, environmental protection.
Claims (7)
1. a kind of no wellbore gas drilling wellhead assembly, it is characterised in that：Including support sealing drum (1), sealing shell body (2) and
Rotary sealing appts (3)；
For the ontology (101) of the support sealing drum (1) for tubular, top is equipped with convex edge (102), and the convex edge (102) is below
Ontology (101) is equipped with external screw thread；
The top of the support sealing drum (1) is tightly connected with the bottom of the sealing shell body (2) by flange (4)；It is described
The side wall of sealing shell body (2) is equipped with bypass (201), for connecting exhaust line；On the inner wall of the sealing shell body (2)
Equipped with step, top is spirally connected upper cover (202)；The middle part of the upper cover (202) is equipped with through hole (203)；
The rotary sealing appts (3) include upper seal (301), lower seal (302), interior rotating cylinder (303), glue core
(304) and thrust bearing (305)；The upper seal (301) and lower seal (302) are tightly connected, and inside forms cavity volume；Institute
It states interior rotating cylinder (303) and includes two sections of integrally formed cylinders, one section of big cylinder of diameter is mounted in the cavity volume, and its side
Boss is formed on wall；One section of small cylinder of diameter extends the cavity volume, and bottom is fixedly installed glue core (304)；It is described
Interior rotating cylinder (303) is both provided with sealing ring with the surface that the upper seal (301), lower seal (302) are in contact；It is described
There are two thrust bearings (305), is separately mounted to the both sides up and down of the boss, for preventing the interior rotating cylinder (303) from existing
It is subjected to displacement during rotation；The glue core (304) is hollow structure, can form sealing structure with drill string (6) obvolvent across it；
The rotary sealing appts (3) are equipped on the step of sealing shell body (2) inner wall in contact position
Seal washer；When the upper cover (202) of the sealing shell body (2) is screwed onto on the sealing shell body (2), the rotatory sealing
The upper seal (301) of device (3), the position of lower seal (302) are fixed.
2. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：The rotary sealing appts (3)
Oil filler point (306), the oil filler point (306) and the installation position of the thrust bearing (305) are additionally provided on upper seal (301)
It puts and communicates.
3. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：Outside the lower seal (302)
Boss I is additionally provided on wall；Sealing ring is installed between boss I and support sealing drum 1.
4. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：On the downside of the support sealing drum (1)
Outer surface be the conical surface.
5. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：Outside the support sealing drum (1)
The rectangular triangle in section or class right angled triangle of screw thread, right-angle side is in upside.
6. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：Outside the sealing shell body (2)
Wall is also vertically equipped with multiple mounting holes (204).
7. as described in claim 1 without wellbore gas drilling wellhead assembly, it is characterised in that：The rotary sealing appts (3)
Hanging ring is both provided on the upper surface of the upper cover (202) of upper seal (301) and the sealing shell body (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721514162.2U CN207568539U (en) | 2017-11-14 | 2017-11-14 | Without wellbore gas drilling wellhead assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721514162.2U CN207568539U (en) | 2017-11-14 | 2017-11-14 | Without wellbore gas drilling wellhead assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207568539U true CN207568539U (en) | 2018-07-03 |
Family
ID=62693327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721514162.2U Active CN207568539U (en) | 2017-11-14 | 2017-11-14 | Without wellbore gas drilling wellhead assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207568539U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829702A (en) * | 2017-11-14 | 2018-03-23 | 中国石油集团渤海钻探工程有限公司 | Without well gas drilling wellhead assembly and bore a layer top layer method of turning up the soil |
-
2017
- 2017-11-14 CN CN201721514162.2U patent/CN207568539U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107829702A (en) * | 2017-11-14 | 2018-03-23 | 中国石油集团渤海钻探工程有限公司 | Without well gas drilling wellhead assembly and bore a layer top layer method of turning up the soil |
| CN107829702B (en) * | 2017-11-14 | 2023-09-05 | 中国石油天然气集团有限公司 | Well mouth device for gas drilling without well hole and method for drilling stratum surface layer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210910 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 Second Avenue 83, China Petroleum Tianjin building Bohai Drilling Engineering Co., Ltd. Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |
|
| TR01 | Transfer of patent right |