A pneumatic mud scraper

Abstract

The present application belongs to the technical field of oil and gas drilling, and particularly relates to a pneumatic mud scraper. The pneumatic mud scraper removes the mud on the outer wall of the tubular column at the wellbore of the drilling rig through the jetting mode, and comprises a supporting member and a jetting member arranged on the supporting member and facing the tubular column. In the process of lifting the tubular column, the jetting member of the pneumatic mud scraper sprays high-pressure air flow to the outer wall of the tubular column, so as to clean the mud on the outer wall of the tubular column.

Description

Technical Field

[0001] This invention belongs to the field of oil and gas drilling technology, specifically, it relates to a pneumatic sludge scraper. Background Technology

[0002] During the construction of oil drilling platforms, the handling of the drill string during drilling and tripping operations is basically automated through the cooperation of equipment such as the second-level platform pipe rack operator, drilling platform robot, and iron driller. However, 2-3 people are still required to complete tasks such as drilling tool slurry scraping, splash prevention, thread oiling, and drilling platform cleaning. The degree of automation is low and the labor intensity of personnel is high.

[0003] During tripping out of the well, splash guards are usually manually carried to the wellhead for splash protection. Although some drill rigs have integrated mud splash protection functions, they only protect the mud at the joint of the tubing string during tripping out. Mud on the surface of each tubing string needs to be manually scraped off during tripping out. Although some drilling rigs are equipped with mechanical scrapers with hydraulic slips, the mud scraping effect is not good.

[0004] Therefore, there is an urgent need to develop a device capable of cleaning mud from the surface of tubing. Summary of the Invention

[0005] To address the technical problems described above, the present invention aims to provide a pneumatic sludge scraper capable of cleaning sludge from the surface of a tubing column.

[0006] According to the present invention, a pneumatic mud scraper is provided to remove mud from the outer wall of the tubing in the wellbore of a drilling rig by means of air jetting. The scraper includes a support member and an air jetting member disposed on the support member, the air jetting member being directed toward the tubing.

[0007] In one specific embodiment, the jet element is configured to conform to the shape of the outer wall of the column.

[0008] In one specific embodiment, the jet component is constructed in a ring shape, and the central axis of the tube column coincides with the central axis of the jet component.

[0009] In one specific embodiment, the jetting element includes two semi-circular jetting rings, which are horizontally movable relative to the drill table surface. By adjusting the distance between the two jetting rings, different sizes of tubing can be accommodated.

[0010] In one specific embodiment, a guide is provided on the drill platform, two support members are movably disposed on the guide, and two air jet rings are respectively fixed on the two support members.

[0011] In one specific embodiment, the two supports move closer or further apart simultaneously.

[0012] In one specific embodiment, two synchronous drive blocks are provided between the support member and the guide member. The two synchronous drive blocks are movably disposed on the guide member and fixedly connected to the two support members respectively. A synchronous drive rod is rotatably disposed on the guide member, and the two ends of the synchronous drive rod are connected to the two synchronous drive blocks by a helix.

[0013] In one specific embodiment, a telescopic cylinder is provided between the two support members.

[0014] In one specific embodiment, the two ends of the telescopic cylinder are respectively fixedly connected to the two synchronous drive blocks.

[0015] In one specific embodiment, the jetting element is located below the drilling platform of the drilling rig.

[0016] Compared with the prior art, the advantages of this application are as follows.

[0017] This invention cleans sludge from the outer wall of a tubing column using an air jet. During the lifting process, the air jet component of the pneumatic scraper of this invention sprays high-pressure airflow onto the outer wall of the tubing column, thereby cleaning the sludge. Attached Figure Description

[0018] The present invention will now be described with reference to the accompanying drawings.

[0019] Figure 1 A schematic diagram of one embodiment of the pneumatic scraper according to the present invention is shown;

[0020] Figure 2 A top view schematic diagram of an embodiment of a pneumatic scraper according to the present invention is shown;

[0021] Figure 3 A schematic diagram of the structure of the pneumatic scraper according to the present invention installed below the drill table of the drilling rig is shown.

[0022] The reference numerals in the figure are as follows:

[0023] 1. Pneumatic scraper; 11. Air jet component; 111. Air jet ring; 12. Support component; 13. Guide component; 131. Telescopic cylinder; 132. Synchronous drive block; 133. Synchronous drive rod; 134. Bearing; 21. Mechanical scraper; 100. Drilling platform.

[0024] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0025] The invention will now be described with reference to the accompanying drawings.

[0026] It should be noted that the directional terms or qualifiers used in this application, such as "upper," "lower," "left," and "right," refer to the accompanying drawings. They are not used to define the absolute position of the components involved, but can vary depending on the specific circumstances.

[0027] Figure 1 The structure of the pneumatic scraper 1 according to the present invention is shown. For example... Figure 1 As shown, the pneumatic scraper 1 mainly includes a support member 12 and an air jet member 11.

[0028] The support member 12 is connected to the drill table 100 of the drilling rig and is used to provide support for the jet 11. The jet 11 is fixedly mounted on the support member 12, and the jet nozzle of the jet 11 faces the drill string. The jet 11 is connected to the air supply mechanism (not shown in the figure) through a pipeline. The specific structure of the connection between the jet 11 and the air supply mechanism is well known to those skilled in the art and will not be described in detail here.

[0029] In one specific embodiment, the tubing string is specifically the drill string. When the drill string needs to be pulled from downhole to above the drill platform 100, the pneumatic scraper 1 can clean the mud on the surface of the drill string by spraying high-pressure airflow. Specifically, as the drill string moves upward and passes the jet nozzle 11 of the pneumatic scraper 1, the jet nozzle 11 sprays high-pressure airflow toward the outer wall of the drill string, thereby cleaning the mud on the surface of the drill string. When the drill string has completely moved upward above the jet nozzle 11 of the pneumatic scraper 1, the mud cleaning on the surface of the drill string is completed.

[0030] In a preferred embodiment, the jet 11 is configured to conform to the shape of the outer wall of the tubing.

[0031] Specifically, such as Figure 1 and Figure 2 As shown, the jet nozzle 11 is constructed in a circular shape. During the upward movement of the drill bit, the central axis of the drill bit coincides with the central axis of the jet nozzle 11, and the drill bit passes through the interior of the jet nozzle 11. The jet nozzle of the jet nozzle 11 is located on the inner wall of the jet nozzle 11, thereby enabling the jetting of high-pressure airflow onto the surface of the drill bit.

[0032] In this embodiment, the jetting element 11 includes two semi-circular jetting rings 111, which are horizontally movable relative to the drill table surface. Specifically, the moving direction of the jetting rings 111 is perpendicular to the contact surface of the two jetting rings 111, and the distance between the two jetting rings 111 can be adjusted to accommodate drill bits of different sizes.

[0033] like Figure 1 and Figure 2As shown, the pneumatic scraper 1 includes a guide member 13, and two support members 12 are movably mounted on the guide member 13, with the direction of movement of the support members 12 perpendicular to the contact surface of the two jet rings 111. The two jet rings 111 are respectively fixed to the two support members 12. In this configuration, the distance between the two jet rings 111 can be adjusted by moving the two support members 12 along the guide member 13.

[0034] In a preferred embodiment, the two supports 12 move closer or further apart simultaneously.

[0035] Specifically, such as Figure 2 As shown, the support member 12 is movably mounted on the guide member 13 via the synchronous drive block 132. The two synchronous drive blocks 132 are movably mounted on the guide member 13, and the two support members 12 are respectively fixedly mounted on the two synchronous drive blocks 132.

[0036] A synchronous drive rod 133 is rotatably mounted on the guide member 13. The central axis of the synchronous drive rod 133 is parallel to the length direction of the guide member 13, and the middle part of the synchronous drive rod 133 is rotatably connected to the guide member 13 via a bearing 134. That is, a bearing 134 is mounted in the middle part of the guide member 13 via a bearing seat, and the synchronous drive rod 133 passes through the bearing 134, thereby enabling the synchronous drive rod 133 to rotate relative to the guide member 13.

[0037] The synchronous drive rod 133 has threads with opposite directions and the same pitch at both axial ends, and the thread helix angle is greater than the equivalent friction angle. The two ends of the synchronous drive rod 133 are connected to two synchronous drive blocks 132 via threads. In this configuration, when one synchronous drive block 132 moves a certain distance axially relative to the synchronous drive rod 133, the synchronous drive rod 133 will rotate relative to the synchronous drive block 132 under the action of the threads. At this time, the other synchronous drive block 132 will move the same distance in the opposite direction under the action of the threads due to the rotation of the synchronous drive rod 133, thereby achieving synchronous approach or distance between the two synchronous drive blocks 132, and consequently, synchronous approach or distance between the jet rings 111 on the two support members 12.

[0038] A telescopic cylinder 131 is provided between the two support members 12, and the telescopic cylinder 131 provides power for the movement of the support member 12 relative to the guide member 13. Specifically, as shown in the figure... Figure 2 As shown, the two ends of the telescopic cylinder 131 are fixedly connected to two synchronous drive blocks 132 respectively.

[0039] In a preferred embodiment, such as Figure 1 As shown, the support member 12 is constructed in the shape of a long rod, and two guide members 13 are respectively arranged at both ends of the axial direction of the support member 12, so that the support member 12 can move more smoothly.

[0040] According to the present invention, such as Figure 1 and Figure 3 As shown, the jetting element 11 is located below the drilling platform 100 of the drilling rig. A mud recovery umbrella is provided below the jetting element 11. The structure of the mud recovery umbrella is well known to those skilled in the art and will not be described in detail here.

[0041] According to the present invention, such as Figure 1 and Figure 3 As shown, a mechanical scraper 21 is provided above the jetting component 11. The structure of the mechanical scraper 21 is well known to those skilled in the art and will not be described in detail here.

[0042] During the tripping process, the pneumatic scraper 1 and the mechanical scraper 21 are used together to thoroughly remove mud from the surface of the drill string. The drill string is first scraped by the high-pressure airflow of the pneumatic scraper 1, and then the mechanical scraper 21 removes the solidified mud from the surface of the drill string, improving the mud removal effect. The removed mud falls directly into the mud recovery umbrella for recycling. When the bottom drill string is reached, the pneumatic scraper and the mechanical scraper 21 automatically open to ensure the smooth retrieval of the drill bit, auger stabilizer, and other bottom drill string components.

[0043] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic sludge scraper, characterized in that, The drilling rig removes mud from the outer wall of the tubing in the wellbore by means of air jetting. The rig includes a support (12) and an air jetting device (11) mounted on the support (12), with the air jetting device (11) facing the tubing.

2. The pneumatic scraper according to claim 1, characterized in that, The jetting element (11) is configured to fit the shape of the outer wall of the tube column.

3. The pneumatic sludge scraper according to claim 2, characterized in that, The jetting element (11) is constructed in a circular shape, and the central axis of the tube column coincides with the central axis of the jetting element (11).

4. The pneumatic scraper according to claim 1, characterized in that, The jetting component (11) includes two semi-circular jetting rings (111), which are horizontally movable relative to the drilling platform of the drilling rig. The distance between the two jetting rings (111) can be adjusted to accommodate different sizes of tubing.

5. The pneumatic scraper according to claim 4, characterized in that, A guide (13) is provided on the drill platform, and two support members (12) are movably disposed on the guide (13). Two air jet rings (111) are respectively fixed on the two support members (12).

6. The pneumatic scraper according to claim 5, characterized in that, The two support members (12) move closer or further apart simultaneously.

7. The pneumatic sludge scraper according to claim 6, characterized in that, Two synchronous drive blocks (132) are provided between the support member (12) and the guide member (13). The two synchronous drive blocks (132) are movably arranged on the guide member (13) and fixedly connected to the two support members (12) respectively. A synchronous drive rod (133) is rotatably arranged on the guide member (13). The two ends of the synchronous drive rod (133) are connected to the two synchronous drive blocks (132) by a spiral.

8. The pneumatic scraper according to claim 7, characterized in that, A telescopic cylinder (131) is provided between the two support members (12).

9. The pneumatic scraper according to claim 8, characterized in that, The two ends of the telescopic cylinder (131) are respectively fixedly connected to the two synchronous drive blocks (132).

10. The pneumatic scraper according to any one of claims 1 to 9, characterized in that, The jetting element (11) is located below the drilling platform of the drilling rig.

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