CN221546893U - Drilling mud circulation wellhead device - Google Patents
Drilling mud circulation wellhead device Download PDFInfo
- Publication number
- CN221546893U CN221546893U CN202323582720.7U CN202323582720U CN221546893U CN 221546893 U CN221546893 U CN 221546893U CN 202323582720 U CN202323582720 U CN 202323582720U CN 221546893 U CN221546893 U CN 221546893U
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- Prior art keywords
- pipe
- drilling mud
- mud circulation
- inner guide
- annular cavity
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- 238000005553 drilling Methods 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 125000003003 spiro group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Earth Drilling (AREA)
Abstract
The utility model belongs to the technical field of drilling, and discloses a drilling mud circulation wellhead device, which comprises a circulating pipe, a sealing gasket and a locking piece, wherein the circulating pipe comprises an inner guide pipe and an outer barrel which are coaxially arranged, the two axial ends of the inner guide pipe are communicated, and the outer barrel is sleeved outside the inner guide pipe and is enclosed with the inner guide pipe to form an annular cavity with one end closed and the other end open; the sealing gasket is arranged in the annular cavity and fixedly connected with the end face of the closed end of the annular cavity; the locking piece is inserted into the annular cavity along the radial direction and is in threaded connection with the outer cylinder. The drilling mud circulation wellhead device can play a role of quickly connecting the surface casing, so that the period of drilling operation is greatly shortened, and the cost is reduced.
Description
Technical Field
The utility model relates to the technical field of drilling, in particular to a drilling mud circulation wellhead device.
Background
The wellhead device is a device which is arranged at a wellhead and used for controlling the pressure and direction of gas and liquid (oil, water and the like) fluid, suspending a casing pipe and an oil pipe and sealing the oil pipe, the casing pipe and annular spaces of the casings of all layers in petroleum and natural gas drilling. In order to achieve circulation of mud during drilling, it is often necessary to use a wellhead to connect the surface casing to a surface-mounted mud pump.
Because the length of the surface casing is not necessarily consistent with the depth required for well drilling, the top end of the surface casing needs to be cut off to be consistent with the well drilling depth after the surface casing is lowered into the well, as shown in fig. 1, before the existing wellhead device is connected with the surface casing 20, the flange 30 needs to be welded at the top end of the surface casing 20 and then is in flanged connection with the circulating pipe (original) 40 with the flange in the wellhead device, and the flange 30 welded on the surface casing 20 needs to be cut off in order to suspend the technical casing and the oil layer casing in the later stage, so that the whole process is complex and takes a long time, and the time cost of drilling operation is increased.
Disclosure of utility model
The utility model aims to provide a drilling mud circulation wellhead device which can realize quick connection with a surface casing and has high operation efficiency.
To achieve the purpose, the utility model adopts the following technical scheme:
The quick connector comprises a circulating pipe, a sealing gasket and a locking piece, wherein the circulating pipe comprises an inner guide pipe and an outer barrel which are coaxially arranged, the two axial ends of the inner guide pipe are communicated, and the outer barrel is sleeved outside the inner guide pipe and is enclosed with the inner guide pipe to form an annular cavity with one end closed and the other end open; the sealing gasket is arranged in the annular cavity and fixedly connected with the end face of the closed end of the annular cavity; the locking piece is inserted into the annular cavity in the radial direction and is in threaded connection with the outer cylinder.
Preferably, the outer cylinder is radially provided with a branch pipe communicated with the inner cavity of the outer cylinder, and the inner wall of the branch pipe is provided with an inner thread matched with the outer thread on the locking piece.
Preferably, a plurality of locking members are provided at intervals along the circumferential direction of the outer cylinder.
Preferably, the outer diameter of the inner guide tube is the same as the inner diameter of the surface layer sleeve.
Preferably, the length of the inner guide tube is 2-3m, and the length of the outer cylinder is 0.3-0.5m.
Preferably, the gasket is a lip gasket, and inner and outer sides of the lip gasket are respectively abutted against an outer wall of the inner guide tube and an inner wall of the outer tube.
Preferably, the inner guide tube comprises a lifting tube section and a connecting tube section which are connected along the axial direction, the bypass tube is arranged on the lifting tube section, and the outer tube is sleeved on the connecting tube section.
Preferably, the riser section is flanged to the connecting section.
Preferably, the length of the connecting pipe section is 2-3m, and the length of the outer cylinder is 0.3-0.5m.
Preferably, a flare is welded to the end of the raised pipe section remote from the connecting pipe section.
Preferably, the inside of the end of the connecting pipe section away from the lifting pipe section is chamfered.
The utility model has the beneficial effects that: the drilling mud circulation wellhead device is provided with the double-layer tubular circulation pipe to form the annular cavity, the surface sleeve can be inserted into the annular cavity and is quickly connected with the quick connector under the action of the locking piece, the whole connection process is few in process, the operation is simple, the drilling operation period is greatly shortened, the circulation pipe can be reused, and the operation cost is reduced.
Drawings
FIG. 1 is a schematic diagram of a prior art connection structure of a circulation pipe and a surface layer sleeve;
FIG. 2 is a schematic illustration of the construction of a drilling mud circulation wellhead in accordance with an embodiment of the present utility model;
Figure 3 is a general assembly view of a surface casing and drilling mud circulation wellhead in an embodiment of the present utility model.
In the figure: 1. a circulation pipe; 11. an inner guide tube; 111. connecting pipe sections; 112. raising the pipe section; 113. a horn mouth; 12. an outer cylinder; 121. a branch pipe; 13. a bypass pipe; 2. a sealing gasket; 3. a locking member;
20. a surface layer sleeve; 30. a flange; 40. circulation pipe (original); 50. and (3) drilling rod.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", etc., azimuth or positional relationship are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description and simplification of operations, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Referring to fig. 2 and 3, a drilling mud circulation wellhead device is provided in an embodiment of the present utility model, and the drilling mud circulation wellhead device comprises a circulation pipe 1, a sealing gasket 2 and a locking member 3, wherein the circulation pipe 1 is provided with a double-layer tubular structure, and comprises an inner guide pipe 11 and an outer cylinder 12 which are coaxially arranged, the outer cylinder 12 is sleeved outside the inner guide pipe 11 and is enclosed with the inner guide pipe 11 to form an annular cavity with one closed end and the other open end, and the sealing gasket 2 is arranged in the annular cavity and is fixedly connected with the end face of the annular cavity, where the end face is sealed. The axial both ends of interior guide tube 11 link up, and drilling rod 50 can insert from the first end of interior guide tube 11 to wear out from the second end, and still be provided with by-pass pipe 13 on the interior guide tube 11 for connect the slush pump, by-pass pipe 13 is located the annular chamber and set up in interior guide tube 11 and be close to annular chamber confined one end, retaining member 3 can insert in the annular chamber and with urceolus 12 spiro union along radial from the urceolus 12 outside, retaining member 3 optional jackscrew.
The drilling mud circulation wellhead described above enables quick connection to the surface casing 20. When in connection, the surface sleeve 20 is inserted into the annular cavity formed by the inner guide pipe 11 and the outer barrel 12, under the gravity action of the whole circulating pipe 1, the top end of the surface sleeve 20 is extruded with the sealing gasket 2 arranged at one closed end in the annular cavity to realize sealing, and the locking piece 3 can be abutted against the surface sleeve 20 by adjusting the length of the locking piece 3 inserted into the annular cavity to realize quick connection and sealing of the surface sleeve 20 and the circulating pipe 1. The whole connection process is quick and simple, has few working procedures and reduces the operation cost because flange connection and flange cutting operation on the surface layer sleeve 20 are not needed. Notably, the drilling mud circulation wellhead is suitable for oil and water wells without shallow formation pressure and familiar with formation pressure in oilfield zones, and is not suitable for use in wells where high formation pressure exists or where formation pressure is not familiar.
In this embodiment, the gasket 2 is a rubber lip gasket, which has an opening facing the annular cavity, and the inner side of the lip gasket is in contact with the outer wall of the inner guide tube 11, and the outer side of the lip gasket is in contact with the inner wall of the outer tube 12. Under the action of gravity of the circulating pipe 1, the surface sleeve 20 is matched with the circulating pipe 1 to extrude the lip-shaped sealing gasket, so that not only is the sealing formed at the end face of the surface sleeve 20, but also the sealing is formed on the inner wall and the outer wall of the surface sleeve 20, and the sealing effect is good.
In order to form stable connection between the locking member 3 and the outer cylinder 12, the outer cylinder 12 is radially provided with a branch pipe 121 communicated with the inner cavity of the outer cylinder 12, namely, the annular cavity, the inner wall of the branch pipe 121 is provided with internal threads matched with external threads on the locking member 3, and the locking member 3 is inserted into the branch pipe 121 to realize threaded connection with the outer cylinder 12. Further, the branch pipes 121 are provided in plural at intervals along the circumferential direction of the outer cylinder 12, and the plurality of locking pieces 3 are inserted in the branch pipes 121 in one-to-one correspondence.
It will be appreciated that the entire inner guide tube 11 may be integrally formed, and that the inner guide tube 11 is separately provided in consideration of the hanging cost and the limitation of the storage space, and includes a lifting tube section 112 and a connecting tube section 111 connected in the axial direction, as shown in fig. 2 and 3, the bypass tube 13 is provided on the side wall of the lifting tube section 112, and the outer tube 12 is sleeved on the connecting tube section 111 and encloses with the wall of the connecting tube section 111 to form an annular cavity. The riser section 112 and the connecting section 111 are flange-connected. Specifically, an upper flange is disposed at one end of the lifting pipe section 112 near the connecting pipe section 111, a lower flange is disposed at one end of the connecting pipe section 111 near the lifting pipe section 112, a mounting groove is disposed on an end face of the upper flange and/or the lower flange, and a sealing steel ring is disposed in the mounting groove to realize sealing connection between the connecting pipe section 111 and the lifting pipe section 112.
It will be appreciated that the dimensions of the inner lead tube 11 and the outer tube 12 constituting the circulation tube 1 are selected depending on the dimensions of the surface layer sleeve 20. In order to enable the skin sleeve 20 to be inserted into the annular cavity, the outer diameter of the connecting tube section 111 is not larger than the inner diameter of the skin sleeve 20, and the inner diameter of the outer tube 12 is not smaller than the outer diameter of the skin sleeve 20. In this embodiment, in order to prevent the surface tube 20 inserted into the annular cavity from being eccentric, the outer diameter of the connection tube section 111 is the same as or similar to the inner diameter of the surface tube 20, and the inner wall of the surface tube 20 is in contact with the outer wall of the connection tube section 111 after the surface tube 20 is inserted into the annular cavity, the surface tube 20 is concentric with the circulation tube 1 under the restriction of the connection tube section 111. Illustratively, on the basis of the 24 "sleeve for the surface sleeve 20, the 22" sleeve for the connecting tube section 111, the 20 "sleeve for the lifting tube section 112, the length of the connecting tube section 111 between 2 and 3m, and the 26" sleeve for the outer tube 12 between 0.3 and 0.5 m. The locking members 3 are provided with 4-6, and the branch pipes 121 are provided with 4-6 correspondingly.
Optionally, the end of the riser section 112 remote from the connecting section 111 is also welded with a flare 113 for providing drill-in guidance for the drilling tool. And the inside of the end of the connecting pipe section 111 far away from the lifting pipe section 112 is provided with a chamfer, the chamfer is 45 degrees, so that the clamping of the drilling tool and the circulating pipe 1 during the drilling is prevented.
When the drilling operation is executed, the drilling tool pipe string and the drilling tool sequentially pass through the lifting pipe section 112 and the connecting pipe section 111, and mud flows out of the mud tank under the action of the mud pump and then sequentially flows through the ground pipeline, the top drive, the drill pipe 50, the drill bit, the outer annulus of the drilling tool (the annular space between the drill pipe 50 and the surface casing pipe and between the drill pipe 50 and the inner guide pipe 11), the bypass pipe 113 and the circulation tank, and then returns to the mud tank again, so that circulation is realized.
It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.
Claims (10)
1. Drilling mud circulation wellhead assembly, characterized in that it comprises:
The circulating pipe (1), the circulating pipe (1) comprises an inner guide pipe (11) and an outer barrel (12) which are coaxially arranged, the outer barrel (12) is sleeved outside the inner guide pipe (11) and is enclosed with the inner guide pipe (11) to form an annular cavity with one closed end and the other open end, the two axial ends of the inner guide pipe (11) are communicated, a bypass pipe (13) is further arranged on the inner guide pipe (11), and the bypass pipe (13) is positioned outside the annular cavity and is close to one closed end of the annular cavity;
The sealing gasket (2) is arranged in the annular cavity and fixedly connected with the end face of the closed end of the annular cavity;
The locking piece (3) is inserted into the annular cavity in the radial direction and is in threaded connection with the outer cylinder (12).
2. Drilling mud circulation wellhead according to claim 1, characterised in that the outer barrel (12) is radially provided with a branch pipe (121) communicating with the inner cavity of the outer barrel (12), the inner wall of the branch pipe (121) being provided with an internal thread cooperating with an external thread on the locking element (3).
3. Drilling mud circulation wellhead according to claim 1, characterised in that the locking elements (3) are arranged in a plurality at intervals along the circumference of the outer barrel (12).
4. Drilling mud circulation wellhead according to claim 1, characterised in that the external diameter of the inner guide tube (11) is the same as the internal diameter of the surface casing (20).
5. Drilling mud circulation wellhead according to claim 1, characterised in that the gasket (2) is a lip gasket, the inner and outer sides of which abut against the outer wall of the inner guide tube (11) and the inner wall of the outer barrel (12), respectively.
6. Drilling mud circulation wellhead according to claim 1, characterised in that the inner guide tube (11) comprises an axially connected riser section (112) and a connecting section (111), the bypass tube (13) being arranged on the riser section (112), the outer tube (12) being sleeved on the connecting section (111).
7. Drilling mud circulation wellhead according to claim 6, characterised in that the riser section (112) is flanged to the connection section (111).
8. Drilling mud circulation wellhead according to claim 6, characterised in that the length of the connecting pipe section (111) is 2-3m and the length of the outer barrel (12) is 0.3-0.5m.
9. Drilling mud circulation wellhead according to claim 6, characterised in that the end of the riser section (112) remote from the connection section (111) is welded with a flare (113).
10. Drilling mud circulation wellhead according to claim 6, characterised in that the end of the connecting pipe section (111) remote from the riser section (112) is internally chamfered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323582720.7U CN221546893U (en) | 2023-12-27 | 2023-12-27 | Drilling mud circulation wellhead device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323582720.7U CN221546893U (en) | 2023-12-27 | 2023-12-27 | Drilling mud circulation wellhead device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221546893U true CN221546893U (en) | 2024-08-16 |
Family
ID=92261032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323582720.7U Active CN221546893U (en) | 2023-12-27 | 2023-12-27 | Drilling mud circulation wellhead device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221546893U (en) |
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2023
- 2023-12-27 CN CN202323582720.7U patent/CN221546893U/en active Active
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