CN207315270U - Simple extension hanger - Google Patents
Simple extension hanger Download PDFInfo
- Publication number
- CN207315270U CN207315270U CN201721375636.XU CN201721375636U CN207315270U CN 207315270 U CN207315270 U CN 207315270U CN 201721375636 U CN201721375636 U CN 201721375636U CN 207315270 U CN207315270 U CN 207315270U
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- CN
- China
- Prior art keywords
- wall
- torsion shaft
- hanger
- hanger body
- bottom end
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- 238000007789 sealing Methods 0.000 claims abstract description 30
- 230000004323 axial length Effects 0.000 claims description 6
- 210000002445 nipple Anatomy 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005553 drilling Methods 0.000 abstract description 6
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model discloses a kind of simple extension hanger, including the hanger body with tube structure, the torsion shaft that is arranged at hanger body medial center and tool joint, left-hand thread swivel nut and sealing shroud of the spacer sleeve mounted in the outside of torsion shaft successively from top to bottom；Wherein, hanger body external wall of upper portion has along the circumferential direction been uniformly arranged a plurality of righting strip；Tool joint bottom is threaded on the top outer wall of torsion shaft；Left-hand thread swivel nut slide fit by the way of spline fitted in torsion shaft, and can move axially in reciprocal fashion on the outer wall of torsion shaft；Sealing shroud is fixed on torsion shaft bottom, and by being provided with least one sealing ring on the inner and outer wall of sealing shroud；The simple extension hanger is simple in structure, easy to operate, can effectively ensure that tail pipe in the wellbore straight and upright placed in the middle, cementing quality is guaranteed, and effectively reduces manufacture cost, and then effectively reduces production drilling cost.
Description
Technical Field
The utility model relates to a well completion construction tool technical field, in particular to simple and easy liner hanger in the development of urban geothermal well.
Background
The liner hanger is an indispensable important well cementing tool in liner well cementing construction operation, and has large using amount and wide application. The existing hanger used on a well cementation site has complete functions, but has complex structure and high manufacturing cost, has strict construction process requirement, large construction difficulty and higher requirement on a well with a tail pipe; the technical level requirements for the technical service personnel are also high. However, in the current practical application, some liner cementing construction operations have not high requirements on construction and cementing quality, such as the development of urban geothermal wells; therefore, it is necessary to develop a simple liner hanger to put the liner into the bottom of the well and hang the liner at a preset position, so that the construction process can be greatly simplified, and the manufacturing cost of the hanger can be greatly reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a realize reduce cost, simplify the construction process flow, reduce the construction degree of difficulty, can effectively guarantee the simple and easy liner hanger of safety in production simultaneously.
Therefore, the utility model discloses technical scheme as follows:
a simple liner hanger comprises a hanger body with a barrel structure, a torsion shaft, a drill rod joint, a back-off threaded sleeve and a sealing sleeve, wherein the drill rod joint, the back-off threaded sleeve and the sealing sleeve are sequentially sleeved on the outer side of the torsion shaft at intervals from top to bottom; the outer wall of the upper part of the hanger body is uniformly provided with a plurality of righting strips along the circumferential direction; the torsion shaft is arranged on the inner side of the hanger body, and the central axis of the torsion shaft is superposed with the central axis of the hanger body; the bottom end of the drill rod joint is in threaded connection with the outer wall of the top end of the torsion shaft; the left-hand thread sleeve is in sliding fit on the torsion shaft in a spline fit mode and can reciprocate on the outer wall of the torsion shaft along the axial direction; a plurality of axial through holes which are uniformly distributed are formed in the reverse-buckling screw sleeve along the circumferential direction; the sealing sleeve is fixed at the bottom end of the torsion shaft, and at least one sealing ring is arranged on the inner wall and the outer wall of the sealing sleeve, so that sealing is formed between the inner wall of the sealing sleeve and the outer wall of the torsion shaft and between the outer wall of the sealing sleeve and the inner wall of the hanger body.
Furthermore, the simple tail pipe hanger further comprises a thrust bearing sleeved on the outer side of the bottom end of the drill rod joint, the top end of the thrust bearing abuts against the lower end face of an annular step arranged on the outer wall of the bottom end of the drill rod joint, and the bottom end of the thrust bearing is pressed on the upper end face of the annular step arranged on the inner wall of the top end of the hanger body.
Furthermore, a plurality of external splines and internal splines which are matched with each other are respectively arranged on the outer wall of the middle part of the torsion shaft and the inner wall of the turnbuckle thread sleeve, and the axial length of the external splines is 2.5 times of the axial length of the internal splines.
Furthermore, a limiting step for limiting the reverse-buckling threaded sleeve to descend is arranged on the inner wall of the hanger body, and the upper end face of the limiting step is flush with the bottom end face of the external spline arranged on the torsion shaft.
Furthermore, an annular step is formed by outwards protruding the inner wall of the bottom end of the torsion shaft, and an annular groove provided with a limit ring is formed in the side wall of the torsion shaft above the annular step, so that the seal sleeve is fixed between the limit ring and the annular step.
Furthermore, the number of the righting strips is 10-18.
Further, the width of the righting strip is 1-3 mm smaller than a hanging groove in a hanging nipple matched with the liner hanger.
Furthermore, a connecting internal thread for connecting a drill rod is processed on the inner wall of the top end of the drill rod joint; and a connecting external thread for connecting with a sleeve is processed on the outer wall of the bottom end of the hanger body.
The simple liner hanger is designed based on the angles of simplifying the construction process, simplifying the operation flow, simplifying the construction difficulty, reducing the manufacturing cost and reducing the production and drilling cost, has a simple structure, is convenient to operate, can effectively ensure that a liner is upright and centered in a well, ensures the well cementation quality, effectively reduces the manufacturing cost and further effectively reduces the production and drilling cost.
Drawings
FIG. 1 is a schematic structural view of a simple liner hanger of the present invention;
fig. 2 is a schematic structural view of the simple and easy liner hanger of the present invention matching with the hanging nipple.
Detailed Description
The present invention will be further described with reference to the following drawings and specific examples, but the following examples are by no means limiting the present invention.
As shown in FIG. 1, the simple liner hanger comprises a hanger body 12 with a barrel structure, a torsion shaft 5, a drill rod joint 2, a reverse threaded sleeve 6 and a sealing sleeve 10 which are sleeved on the outer side of the torsion shaft 5 at intervals from top to bottom; wherein,
ten centering bars 13 are uniformly distributed on the outer wall of the upper part of the hanger body 12 along the circumferential direction; the outer wall of the bottom end of the hanger body 12 is provided with a connecting external thread for connecting with a sleeve;
the torsion shaft 5 is arranged on the inner side of the hanger body 12, and the central axis of the torsion shaft 5 is superposed with the central axis of the hanger body 12; the outer wall of the top end of the torsion shaft 5 is provided with a connecting external thread;
the inner wall of the top end of the drill rod joint 2 is provided with a connecting internal thread for connecting with a drill rod, and the inner wall of the bottom end of the drill rod joint is provided with a connecting internal thread for matching with the external thread of the top end of the torsion shaft 5, so that the drill rod joint 2 and the torsion shaft 5 are connected and fixed in a threaded manner; the outer wall of the bottom end of the drill rod joint 2 is inwards sunken to form an annular step, and a thrust bearing 4 for bearing the axial force applied by the drill rod joint 2 is sleeved outside the drill rod joint 2 below the annular step; correspondingly, the inner wall of the top end of the hanger body 12 is inwards sunken to form an annular step, so that the top surface of the thrust bearing 4 is abutted against the lower end surface of the annular step of the drill rod joint 2, and the bottom surface of the thrust bearing is pressed on the upper end surface of the annular step of the hanger body 12;
the back-off thread insert 6 is in sliding fit on the torsion shaft 5 in a spline fit manner and can reciprocate on the outer wall of the torsion shaft 5 along the axial direction; specifically, a plurality of external splines and internal splines which are matched with each other are respectively arranged on the outer wall of the middle part of the torsion shaft 5 and the inner wall of the turnbuckle thread sleeve 6, and the axial length of the external splines is 2.5 times of the axial length of the internal splines; correspondingly, a limiting step for limiting the reverse-threaded screw sleeve 6 to descend is arranged on the inner wall of the hanger body 12, the upper end face of the limiting step is flush with the bottom end face of the external spline arranged on the torsion shaft 5, and the reverse-threaded screw sleeve 6 is prevented from slipping off from the external spline arranged on the outer wall of the torsion shaft 5;
in order to ensure that the back-off thread insert 6 can easily reciprocate on the outer wall of the torsion shaft 5 along the axial direction, a plurality of axial through holes are uniformly distributed on the back-off thread insert 6 along the circumferential direction;
an annular step is formed by outwards protruding the inner wall of the bottom end of the torsion shaft 5, and an annular groove provided with a limiting ring 7 is formed in the side wall of the torsion shaft 5 above the annular step, so that the sealing sleeve 10 is fixed between the limiting ring 7 and the annular step, namely the sealing sleeve 10 is fixed at the bottom end of the torsion shaft 5; meanwhile, two sealing rings are respectively arranged on the inner wall and the outer wall of the sealing sleeve 10, so that sealing is respectively formed between the inner wall of the sealing sleeve 10 and the outer wall of the torsion shaft 5 and between the outer wall of the sealing sleeve 10 and the inner wall of the hanger body 12, and slurry entering from the bottom end of the hanger body 12 is prevented from entering a structure above the sealing sleeve 10.
When in use, the simple liner hanger is matched with the sitting hanging short section for use. Correspondingly, the matched sitting and hanging short section comprises a sitting and hanging short section body 16 with a barrel structure, and a connecting internal thread and a connecting external thread for connecting and fixing are respectively processed on the inner wall of the top end and the outer wall of the bottom end of the sitting and hanging short section body 16; a sitting hanging step 15 is machined on the inner wall of the sitting hanging nipple body 16, and the upper end surface of the sitting hanging step 15 is machined into a conical surface; the inner wall below the sitting hanging step 15 is provided with a plurality of ten sitting hanging grooves 14 which are uniformly distributed along the circumferential direction and can be matched with the centralizing strips on the simple tail pipe hanger, and the width of the centralizing strips 13 is less than 3mm of the sitting hanging grooves.
The working principle of the simple liner hanger is as follows:
firstly, assembling the simple tail pipe hanger according to a figure 1, then connecting a drill rod at the top end of the simple tail pipe hanger through threads, connecting a tail pipe to be put into a well at the bottom end of the simple tail pipe hanger through threads, and combining the drill rod and the tail pipe to form a pipe string; when all the pipes are strung to a set position, the sitting and hanging righting strip 13 of the hanger of the utility model is directly hung on the sitting and hanging step 15; after the cement injection operation is completed according to the well cementation design, the drilling rod is fed rightwards to be reversely buckled, the sitting and hanging righting strip 13 naturally slides into the sitting and hanging groove 14 if rotating, the sitting and hanging righting strip 13 does not rotate along with the drilling rod, and after the reversing is completed, the fed drilling rod and all components of the simple liner hanger except the body are lifted out, so that the liner hanging construction operation is completed. If the hanger does not need to be grouted after being hung, the hanger can be directly turned over, and then all components of the simple tail pipe hanger except the body are lifted out, so that all construction operations are completed.
Claims (8)
1. The simple tail pipe hanger is characterized by comprising a hanger body (12) with a barrel structure, a torsion shaft (5), a drill rod joint (2), a back-off thread sleeve (6) and a sealing sleeve (10), wherein the drill rod joint (2), the back-off thread sleeve and the sealing sleeve are sequentially sleeved on the outer side of the torsion shaft (5) at intervals from top to bottom; wherein,
a plurality of righting strips (13) are uniformly distributed on the outer wall of the upper part of the hanger body (12) along the circumferential direction;
the torsion shaft (5) is arranged on the inner side of the hanger body (12), and the central axis of the torsion shaft (5) is superposed with the central axis of the hanger body (12);
the bottom end of the drill rod joint (2) is in threaded connection with the outer wall of the top end of the torsion shaft (5);
the reverse-buckling threaded sleeve (6) is in sliding fit on the torsion shaft (5) in a spline fit mode and can reciprocate on the outer wall of the torsion shaft (5) along the axial direction; a plurality of axial through holes are uniformly distributed on the left-hand thread insert (6) along the circumferential direction;
the sealing sleeve (10) is fixed at the bottom end of the torsion shaft (5), and at least one sealing ring is arranged on the inner wall and the outer wall of the sealing sleeve (10), so that sealing is formed between the inner wall of the sealing sleeve (10) and the outer wall of the torsion shaft (5) and between the outer wall of the sealing sleeve (10) and the inner wall of the hanger body (12).
2. The simple liner hanger as claimed in claim 1, further comprising a thrust bearing (4) sleeved outside the bottom end of the drill pipe joint (2), wherein the top end of the thrust bearing (4) abuts against the lower end face of the annular step formed on the outer wall of the bottom end of the drill pipe joint (2), and the bottom end of the thrust bearing is press-fitted on the upper end face of the annular step formed on the inner wall of the top end of the hanger body (12).
3. The simple liner hanger according to claim 1, wherein a plurality of external splines and internal splines are respectively formed on the outer wall of the middle part of the torsion shaft (5) and the inner wall of the turn-back thread insert (6), and the axial length of the external splines is 2.5 times of the axial length of the internal splines.
4. The simple liner hanger as claimed in claim 3, wherein a limit step for limiting the backward movement of the reverse threaded sleeve (6) is formed on the inner wall of the hanger body (12), and the upper end surface of the limit step is flush with the bottom end surface of the external spline formed on the torsion shaft (5).
5. The simple liner hanger as claimed in claim 1, wherein an annular step is formed by the outward protrusion of the inner wall of the bottom end of the torsion shaft (5), and an annular groove with a limit ring (7) is formed on the side wall of the torsion shaft (5) above the annular step, so that the sealing sleeve (10) is fixed between the limit ring (7) and the annular step.
6. The simple liner hanger according to claim 1, wherein the number of the centralizing strips (13) is 10-18.
7. The simple liner hanger as claimed in claim 1, wherein the width of the centralizing bar (13) is 1-3 mm smaller than the hanging slot on the hanging nipple used with the liner hanger.
8. The simple liner hanger as claimed in claim 1, wherein the inner wall of the top end of the drill rod joint (2) is provided with a connecting internal thread for connecting with a drill rod; and a connecting external thread for connecting with a sleeve is processed on the outer wall of the bottom end of the hanger body (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375636.XU CN207315270U (en) | 2017-10-24 | 2017-10-24 | Simple extension hanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721375636.XU CN207315270U (en) | 2017-10-24 | 2017-10-24 | Simple extension hanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207315270U true CN207315270U (en) | 2018-05-04 |
Family
ID=62382284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721375636.XU Active CN207315270U (en) | 2017-10-24 | 2017-10-24 | Simple extension hanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207315270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389509A (en) * | 2021-07-20 | 2021-09-14 | 河北上善石油机械有限公司 | Liner hanger for well completion |
-
2017
- 2017-10-24 CN CN201721375636.XU patent/CN207315270U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113389509A (en) * | 2021-07-20 | 2021-09-14 | 河北上善石油机械有限公司 | Liner hanger for well completion |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210628 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. |