CN217151861U - Reverse buckling joint of packer for open hole well testing of coal-bed gas well - Google Patents
Reverse buckling joint of packer for open hole well testing of coal-bed gas well Download PDFInfo
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- CN217151861U CN217151861U CN202220090966.9U CN202220090966U CN217151861U CN 217151861 U CN217151861 U CN 217151861U CN 202220090966 U CN202220090966 U CN 202220090966U CN 217151861 U CN217151861 U CN 217151861U
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- gas well
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- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 14
- 230000007423 decrease Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of the geological survey, concretely relates to packer left-hand thread connects for coal bed gas well bore hole well testing. The packer solves the technical problem that when the packer is clamped in a well in the coal-bed gas well testing process, an oil pipe/drill rod is also clamped together and cannot be lifted out. A reverse buckling joint of a packer for open hole well testing of a coal bed gas well comprises an upper adapter and a lower adapter which are both tubular structures; the upper end of the upper adapter is provided with a female thread for connecting a right thread of a drill bit or an oil pipe, and the lower end of the upper adapter is provided with a male thread for connecting a left thread; the upper end of the lower adapter is provided with a female thread which is reversely buckled, and the lower end of the lower adapter is provided with a male thread which is used for connecting a right buckle of a packer; the upper end of the lower adapter is rotatably matched with the lower end of the upper adapter. The utility model discloses simple structure, low cost is suitable for in industry popularization and application.
Description
Technical Field
The utility model belongs to the technical field of the geological survey, concretely relates to packer left-hand thread connects for coal bed gas well bore hole well testing.
Background
The method comprises the following steps that (1) a coal bed gas well constructed in coal bed gas geological exploration is required to be subjected to well testing operation, the well testing operation is generally divided into open hole well testing and casing well testing, the open hole well testing refers to well testing engineering before unbundling, and due to the fact that a well wall is soft, the well wall is damaged after well testing is finished, engineering accidents such as block falling are easily caused, and therefore a packer is clamped in the well wall and cannot be lifted out; the conventional packer joints and joints of oil pipes/drill rods are always positively buckled, so that hundreds of meters of oil pipes/drill rods are clamped in a well together and cannot be lifted out when the packer is clamped, the whole well becomes a waste well, and huge loss is caused to a first square and a construction unit. The device is designed to solve the problem in order to prevent the situation that all oil pipes/drill rods cannot be pulled out when an accident occurs.
Disclosure of Invention
In order to solve the packer card when in the well that has pertinence, oil pipe drilling rod also blocks the technical problem that can't play out together, the utility model designs a packer left-hand thread connects for coal seam gas well bore hole well testing.
The currently used joints are all right-handed joints, the packer and the oil pipe/drill rod cannot be separated through the forward/reverse rotation operation of a ground drilling machine, so that once the packer is stuck, the oil pipe/drill rod is also stuck together and cannot be recycled, and a constructor suffers huge loss.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a reverse buckling joint of a packer for open hole well testing of a coal bed gas well comprises an upper adapter and a lower adapter which are both tubular structures; the upper end of the upper adapter is provided with a female thread for connecting a right thread of a drill bit or an oil pipe, and the lower end of the upper adapter is provided with a male thread for connecting a left thread; the upper end of the lower adapter is provided with a female thread which is reversely buckled, and the lower end of the lower adapter is provided with a male thread which is used for connecting a right buckle of a packer; the upper end of the lower adapter is rotatably matched with the lower end of the upper adapter.
The upper adapter adopts a form of 'upper female lower male', wherein the upper female thread (internal thread) is a right-hand thread, and the lower male thread (external thread) is a left-hand thread.
The lower adapter adopts a form of 'upper female lower male', wherein the upper female thread (internal thread) is a left-hand thread, and the lower male thread (external thread) is a right-hand thread.
The utility model discloses when can effectively solve coal bed gas well test well card packer, the difficult problem that oil pipe drilling rod also can't play out in the well together card.
The upper adapter and the lower adapter are matched to be used for switching of a 95mm drill rod and an 80mm packer. The upper adapter and the lower adapter are matched for switching of 73mm oil pipes and 80mm packers. The upper adapter and the lower adapter are matched to be used for switching of a 60.3mm oil pipe and an 80mm packer. The upper portion adapter external diameter is the round platform shape structure that reduces gradually by female thread bottom downwards to the public screw thread top. The outer diameter of the upper adapter is of a gradually enlarged circular truncated cone-shaped structure from the bottom of the female thread to the top of the male thread. The outer diameter of the upper adapter is of a gradually enlarged circular truncated cone-shaped structure from the bottom of the female thread to the top of the male thread. The external diameter of lower part adapter is by female screw thread down to the same size of pin thread top. The utility model discloses include 4 kinds of adapters during the application, wherein the upper portion adapter has three kinds of specifications, is first adapter, third adapter, fourth adapter respectively, and the lower part adapter only has a specification, the second adapter promptly. Because supporting drilling rod of well testing operation or oil pipe generally have three kinds of specifications of 95mm, 73mm and 60.3mm, the utility model discloses the use of supporting adapter under 3 kinds of situations has been designed to above-mentioned three kinds of specification drilling rods or oil pipe.
The first adapter and the second adapter are matched for the adapter connection of a 95mm drill pipe and an 80mm packer; the third adapter and the second adapter are matched for switching of a 73mm oil pipe and an 80mm packer; the fourth adapter and the second adapter are matched to be used for switching of a 60.3mm oil pipe and an 80mm packer.
This adapter should screw up on ground before packer down, then go into the well and carry out the well testing operation. If packer card can't take out in the wall of a well after the well test, only need operate the rig on ground, make rig corotation, then upper portion adapter and lower part adapter (specifically be first adapter and second adapter or third adapter and second adapter, or fourth adapter and second adapter) because its junction is left-hand thread, can drop along with rig corotation, thereby play out the drilling tool on packer upper portion is whole, like this only need to the packer of card handle can, the handling accident degree of difficulty greatly reduced, the drilling tool on upper portion also can be retrieved and is recycled. The utility model discloses simple structure, low cost is suitable for in industry popularization and application.
Drawings
FIG. 1 the utility model discloses a first, second adapter collocation is used in the switching structure sketch map of 95mm drilling rod and 80mm packer.
Fig. 2 third, second adapter collocation is used in the switching structure sketch map of 73mm oil pipe and 80mm packer.
Figure 3 fourth, second adapter collocation is used in the switching structure sketch map of 60.3mm oil pipe and 80mm packer.
1-first adapter, 2-second adapter, 3-third adapter, 4-fourth adapter, 5-95mm drill rod, 6-73mm oil pipe, 7-60.3mm oil pipe and 8-80mm packer.
Detailed Description
For making the utility model discloses the technological means, creation characteristic, achievement purpose and efficiency that realize are easily understood and are known, combine specific implementation below, further explain the utility model discloses:
in conjunction with FIGS. 1-3: a reverse buckling connector of a packer for open hole well testing of a coal bed gas well comprises a first adapter 1, a second adapter 2, a third adapter 3 and a fourth adapter 4. The first adapter 1 and the second adapter 2 are matched and used for adapting a 95mm drill pipe and an 80mm packer; the third adapter 3 and the second adapter 2 are matched for switching of an oil pipe with 73mm and a packer with 80 mm; the fourth adapter 4 and the second adapter 2 are matched to be used for switching of a 60.3mm oil pipe and an 80mm packer.
The first adapter 1 and the second adapter 2 are matched and used for adapting a 95mm drill pipe and an 80mm packer; the third adapter 3 and the second adapter 2 are matched for switching of an oil pipe with 73mm and a packer with 80 mm; the fourth adapter 4 and the second adapter 2 are matched to be used for switching of a 60.3mm oil pipe and an 80mm packer.
As can also be seen from fig. 1-3, the outer diameter of the first adapter 1 is of a truncated cone-shaped structure which gradually decreases from the bottom of the female thread to the top of the male thread, the female thread is arranged on the inner wall of the pipe with the same outer diameter as the top end of the truncated cone and matched with the right-handed male thread at the bottom of the 95mm drill rod, the outer diameter of the male thread is the same as the outer diameter of the lower end of the truncated cone, the upper end of the structure is convenient to be connected with the 95mm drill rod 5, and the lower end of the structure is convenient to be connected with the second adapter 2.
The outer diameter of the third adapter 3 is of a cone-shaped structure gradually enlarged from the bottom of the female thread to the top of the male thread, the outer diameter of the cone is slightly enlarged from top to bottom, the female thread is arranged on the inner wall of the pipe with the outer diameter being the same as that of the top end of the cone and matched with the right-hand thread at the bottom of the oil pipe 6 with the diameter of 73mm, the outer diameter of the male thread is smaller than that of the bottom end of the cone, the upper end of the structure is convenient for the connection of the oil pipe 6 with the diameter of 73mm, and the lower end of the structure is convenient for the connection with the second adapter 2.
The 3 external diameters of fourth adapter are the round platform shape structure that enlarges gradually by female thread bottom downwards to the pin thread top, and the female thread is opened at the pipe inner wall that the external diameter is the same with round platform top external diameter, and matches with the positive thread of 60.3mm oil pipe 7 bottoms, and the pin thread external diameter is less than round platform bottom external diameter, and such structure upper end is convenient for 60.3mm oil pipe 7 to be connected, and the lower extreme is convenient for be connected with second adapter 2.
The external diameter of second adapter 2 is by female screw thread down to the same size of pin thread top, and the female screw thread of top left-hand thread cooperatees with first, third, fourth adapter respectively, and the positive thread pin thread of bottom cooperatees with the positive thread box thread at 80mm packer top.
The working principle is as follows: this adapter should screw up on ground before packer down, then go into the well and carry out the well testing operation. If packer card can't take out in the wall of a well after the well test, only need operate the rig on ground, make rig corotation, then first adapter 1 and second adapter 2 (or third adapter 3 and second adapter 2, or fourth adapter 4 and second adapter 2) because its junction is left-hand thread, can drop along with rig corotation, thereby play out the drilling tool on packer upper portion is whole, like this only need to the packer of card handle can, the handling accident degree of difficulty greatly reduced.
The present embodiment is not intended to limit the shape, material, structure, etc. of the present invention in any form, and all of the technical matters of the present invention belong to the protection scope of the present invention to any simple modification, equivalent change and modification made by the above embodiments.
Claims (8)
1. A reverse buckling joint of a packer for open hole well testing of a coal bed gas well is characterized by comprising an upper adapter and a lower adapter which are both tubular structures; the upper end of the upper adapter is provided with a female thread for connecting a right thread of a drill bit or an oil pipe, and the lower end of the upper adapter is provided with a male thread for connecting a left thread; the upper end of the lower adapter is provided with a female thread which is reversely buckled, and the lower end of the lower adapter is provided with a male thread which is used for connecting a right buckle of a packer; the upper end of the lower adapter is rotatably matched with the lower end of the upper adapter.
2. The packer stab sub for open-hole testing of a coal-bed gas well of claim 1, wherein the upper adapter and the lower adapter are used in combination for adapting a 95mm drill pipe and an 80mm packer.
3. The packer left-hand sub for open hole testing of a coal bed gas well as claimed in claim 1, wherein the upper adapter and the lower adapter are used in combination for adapting a 73mm tubing and an 80mm packer.
4. The packer back-off joint for open hole testing of a coal-bed gas well as claimed in claim 1, wherein the upper adapter and the lower adapter are used in combination for adapting a 60.3mm tubing and an 80mm packer.
5. The packer stab sub for open hole testing of a coal bed gas well of claim 2, wherein the upper adapter has a frustoconical configuration with an outer diameter that decreases from a bottom of the female thread down to a top of the male thread.
6. The packer stab sub for open hole testing of a coal bed gas well of claim 3, wherein the outer diameter of the upper adapter is in a gradually expanding truncated cone shape from the bottom of the female thread down to the top of the male thread.
7. The packer stab sub for open hole testing of a coal bed gas well according to claim 4, wherein the outer diameter of the upper adapter is in a gradually expanding truncated cone shape from the bottom of the female thread to the top of the male thread.
8. The packer stab sub for open-hole testing of a coal-bed gas well according to any of claims 1 to 7, wherein an outer diameter of the lower sub-joint is the same from the female thread down to a top of the male thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220090966.9U CN217151861U (en) | 2022-01-14 | 2022-01-14 | Reverse buckling joint of packer for open hole well testing of coal-bed gas well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220090966.9U CN217151861U (en) | 2022-01-14 | 2022-01-14 | Reverse buckling joint of packer for open hole well testing of coal-bed gas well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217151861U true CN217151861U (en) | 2022-08-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220090966.9U Active CN217151861U (en) | 2022-01-14 | 2022-01-14 | Reverse buckling joint of packer for open hole well testing of coal-bed gas well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217151861U (en) |
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2022
- 2022-01-14 CN CN202220090966.9U patent/CN217151861U/en active Active
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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: 20231107 Address after: 030006 No.170, Jinyang street, Xiaodian District, Taiyuan City, Shanxi Province Patentee after: Shanxi coal geological exploration and Research Institute Co.,Ltd. Address before: 030006 No.170, Jinyang street, Taiyuan City, Shanxi Province Patentee before: SHANXI COAL GEOLOGY SURVEYS Research Institute |
|
| TR01 | Transfer of patent right |