Device for realizing casing circulation from top drive

Abstract

The utility model relates to the technical field of well drilling construction, in particular to a device for realizing casing circulation from a top drive, which comprises a top drive circulation joint, a well cementation hose and a casing circulation head, one end of the top drive circulation connector is connected with a top drive through a top drive square protection connector, and the other end of the top drive circulation connector is connected with one end of the well cementation hose. The other end of the well cementation hose is connected with one end of the casing pipe circulation head, and the other end of the casing pipe circulation head is in threaded connection with a casing pipe. According to the utility model, the problems of low timeliness and high risk in the conventional casing running operation are solved, and the goals of cost reduction and efficiency improvement are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling construction, in particular to a device for realizing casing circulation from a top drive. Background Art

[0002] In oil drilling operations, after completing a well section, casing of the appropriate size is typically run to seal the formation. This process is crucial for maintaining downhole stability and preventing drilling fluid loss. Casing running requires timely grouting to prevent excessive hollowing and the resulting collapse of the casing. Furthermore, to prevent complications such as casing sticking, the casing must be kept stationary for a limited period of time. This is especially important in complex downhole sections or those with large pressure differentials.

[0003] During casing running in offshore oil drilling, it is generally required to connect the last casing to the casing circulation head while running casing. During the operation, when running the second-to-last casing, the last casing is hoisted to the main entrance of the drilling platform, the casing circulation head is connected to the female end of the last casing and tightened, and the second-to-last casing is grouted while being run, and the entire casing string is required to be filled. After the second-to-last casing is in place, the slips are set, and the top drive elevator buckles the last casing and lifts it above the second-to-last casing. After the casing clamp is buckled, the drilling platform pneumatic winch is used to lift the hanging basket and cementing hose to the casing circulation head. The operator wears high-altitude work labor protection and stands in the hanging basket to connect the cementing hose union with the upper union of the casing circulation head and tighten it. The pneumatic winch slowly lowers the operator and the hanging basket to the drilling platform, lifts the casing string on the top drive and takes out the casing slips, starts the mud pump to let the drilling fluid from the mud pump through the cementing hose into the casing string for circulation while lowering the casing.

[0004] However, this conventional operation mode has some significant shortcomings:

[0005] 1. Workers face a greater risk of falling and injury when working at height.

[0006] 2. When connecting the cementing hose and the casing circulation head at a high altitude, the buckling operation is difficult and it is easy to buckle them incorrectly, resulting in low operation efficiency.

[0007] 3. Since the operators have no fixed fulcrum at high altitudes, they have poor stability when swinging the hammer to hit the buttons, which affects the work efficiency.

[0008] 4. The length of the cementing hose limits the upward and downward movement range of the casing string, which may lead to restricted movement in complex situations. It is also easy to collide with the top drive movable beam during movement, increasing the operation risk.

[0009] 5. Low operating efficiency may cause the casing string to remain stationary in the well for too long, increasing the risk of casing jamming due to pressure differential.

[0010] 6. The efficiency and effect of using top drive to directly grout casing string are not ideal. Utility Model Content

[0011] The purpose of the present invention is to provide a casing circulation device from a top drive in order to solve at least one of the above technical problems, so as to improve the safety, efficiency and reliability of the operation, reduce the operation risk, and ensure the smooth progress of the casing operation.

[0012] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0013] A casing circulation device for realizing casing circulation from a top drive, comprising: a top drive circulation joint, a cementing hose, and a casing circulation head;

[0014] One end of the top drive circulation joint is connected to the top drive through a top drive square connector, and the other end is connected to one end of the cementing hose;

[0015] The other end of the cementing hose is connected to one end of the casing circulation head, and the other end of the casing circulation head is threadedly connected to the casing.

[0016] Furthermore, both ends of the cementing hose are provided with hose oil female joints.

[0017] Furthermore, one end of the top drive circulation joint is provided with a female joint and the other end is provided with a joint oil male buckle;

[0018] The female joint is matched and connected with the top drive square connector; the joint oil pin buckle is connected with the hose oil pin female joint provided at one end of the cementing hose.

[0019] Furthermore, the length of the top drive circulation joint is set to 1m.

[0020] Furthermore, one end of the casing circulation head is provided with a circulation head oil pin buckle, and the other end is provided with a circulation head thread pin buckle;

[0021] The circulating head oil nipple buckle is connected to the hose oil nipple female connector at one end of the cementing hose away from the top drive circulating connector;

[0022] The circulating head threaded male buckle is threadedly connected to the casing female joint at one end of the casing.

[0023] Furthermore, the casing circulation head is also provided with a circulation head lifting lug, and the circulation head lifting lug is provided at an end away from the circulation head threaded male buckle.

[0024] Furthermore, the length of the cementing hose is calculated by the following formula:

[0025] Cementing hose length = top drive lifting ring length - top drive circulation joint length - casing circulation head height + (5-10cm).

[0026] Furthermore, the length of the cementing hose is set to 40-50 cm.

[0027] The utility model has the following effects:

[0028] (1) Simple structure, easy processing and low investment cost.

[0029] (2) It has good application prospects and can be widely used in casing operations in oil drilling.

[0030] (3) On-site operations are simple, time-efficient, and risk-free.

[0031] The utility model provides a casing circulation equipment for top drive, which utilizes a top drive circulation joint, a cementing hose and a casing circulation head to realize the direct entry of drilling fluid from the top drive into the casing string for circulation; at the same time, the connection operation of the cementing hose, the casing circulation head and the top drive circulation joint is arranged on the drilling platform, which effectively avoids the risk of high-altitude operation for operators and the risk of complex underground situations caused by low efficiency, and realizes high-quality and efficient casing running operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a device for realizing casing circulation from a top drive according to one embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of a cementing hose according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of a top drive circulation joint according to an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of a casing circulation head according to an embodiment of the present invention.

[0036] In the figure: 1, female connector, 2, male connector oil connector, 3, female connector oil connector for hose, 4, cementing hose, 5, male connector oil connector for circulating head, 6, lifting eye for circulating head, 7, circulating head for casing, 8, male threaded connector for circulating head, 9, circulating connector for top drive. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] Figure 1 This is a schematic diagram of the overall structure of a casing circulation device implemented from a top drive according to an embodiment of the present invention. Figure 1 As shown, according to one embodiment of the present invention, a casing circulation device is provided for realizing casing circulation from a top drive, comprising: a top drive circulation joint 9, a cementing hose 4, and a casing circulation head 7;

[0039] One end of the top drive circulation joint 9 is connected to the top drive through the top drive square joint, and the other end is connected to one end of the cementing hose 4;

[0040] The other end of the cementing hose 4 is connected to one end of the casing circulation head 7, and the other end of the casing circulation head 7 is threadedly connected to the casing.

[0041] In this embodiment, the casing circulation device for top drive operation includes a top drive circulation connector 9, a cementing hose 4, and a casing circulation head 7, which are connected in sequence. The end of the top drive circulation connector 9, facing away from the cementing hose 4, is connected to the top drive via a top drive square connector. The end of the casing circulation head 7, facing away from the cementing hose 4, is threadedly connected to the casing. Drilling fluid circulates directly from the top drive into the casing string. The connection of the cementing hose 4 to the casing circulation head 7 and the top drive circulation connector 9 is performed on the rig floor, effectively avoiding the risks of high-altitude operations and the complex downhole conditions caused by time constraints, thereby achieving high-quality and efficient casing running.

[0042] The utility model solves the problems of low efficiency and high risk in conventional casing running operations, and achieves the goal of reducing costs and increasing efficiency.

[0043] Figure 2 This is a schematic diagram of a cementing hose according to an embodiment of the present invention. Figure 2 As shown, according to an embodiment of the present invention, both ends of the cementing hose 4 are provided with hose oil female connectors 3.

[0044] In this embodiment, a hose oil female connector 3 is provided at both ends of the cementing hose 4. The upper end of the cementing hose 4 is connected to the top drive circulation joint 9 through the hose oil female connector 3, and the lower end of the cementing hose 4 is connected to the casing circulation head 7 through the hose oil female connector 3. The cementing hose 4 can be bent in the middle and can be used to achieve a soft connection with a certain torsion angle.

[0045] The cementing hose of this utility model is connected to the top drive circulation joint and the casing circulation head through hose oil female connectors at both ends, forming a flexible connection system. This allows the cementing hose to bend in the middle and withstand a certain degree of torsion, thus realizing a flexible connection function when grouting the casing during drilling operations. This flexible connection not only improves the flexibility and adaptability of the operation, but also helps to reduce the stress concentration caused by rigid connections, improving the efficiency and safety of the entire cementing operation.

[0046] Figure 3 This is a schematic diagram of a top drive circulation joint according to an embodiment of the present invention. Figure 3 As shown, according to one embodiment of the present invention, a top drive circulation joint 9 is provided with a female joint 1 at one end and a joint oil pin 2 at the other end;

[0047] The female connector 1 is matched with the top drive square connector; the connector oil-retaining male buckle 2 is connected to the hose oil-retaining female connector 3 provided at one end of the cementing hose 4;

[0048] The length of the top drive circulation joint 9 is set to 1m.

[0049] In this embodiment, the top drive circulation joint 9 is a section of drill pipe with a female joint. The upper end female joint 1 is matched and connected with the top drive square joint, and the lower end is processed into a joint oil pin male buckle 2, which is matched and connected with the hose oil pin female joint 3 of the cementing hose 4; the 1-meter length of the top drive circulation joint 9 is set to ensure operational efficiency and safety while also taking into account the durability of the equipment and the convenience of operation, providing a reliable and efficient connection solution for the entire drilling operation.

[0050] The design of this new top drive circulation joint cleverly integrates the female connector and the male connector on the same drill pipe structure, allowing the top drive circulation joint to be directly and tightly connected to the top drive square connector. At the same time, the male connector is reliably connected to the cementing hose through the female connector. This integrated design not only simplifies the connection process during drilling operations and reduces the number of connecting parts, but also improves the stability of the connection and the efficiency of the operation. The new top drive circulation joint can effectively transmit the power of the top drive to the cementing hose, thereby promoting the circulation of drilling fluid in the casing and providing a solid foundation for grouting operations.

[0051] Figure 4 This is a schematic diagram of a casing circulation head according to an embodiment of the present invention. Figure 4 As shown, according to one embodiment of the present invention, a casing circulation head 7 is provided with a circulation head oil pin 5 at one end and a circulation head thread pin 8 at the other end;

[0052] The circulating head oil reel male buckle 5 is connected to the hose oil reel female connector 3 at the end of the cementing hose 4 away from the top drive circulating connector 9;

[0053] The circulating head threaded male buckle 8 is threadedly connected to the casing female joint at one end of the casing;

[0054] The casing circulation head 7 is also provided with a circulation head lifting lug 6 , which is arranged at one end away from the circulation head threaded male buckle 8 .

[0055] In this embodiment, the hose oil female connector 3 at the bottom of the cementing hose 4 connects to the circulating head oil female male connector 5 at the top of the casing circulation head 7. The circulating head threaded male connector 8 at the bottom of the casing circulation head 7 is threadedly connected to the casing female connector at the top of the last casing. The casing circulation head 7 is a straight tube body, serving as an intermediate buckle connection. Two circulating head lifting lugs 6 are located at the same end as the circulating head oil female male connector 5 to facilitate installation and handling of the casing circulation head 7, playing a key role in ensuring operational stability and safety.

[0056] The casing circulation head of the utility model ensures the circulation flow of drilling fluid inside the casing, forms a stable connection channel, provides a reliable intermediate variable buckle connection point, reduces the potential risks caused by improper connection, and ensures the smooth progress of the casing grouting process.

[0057] According to one embodiment of the present invention, the length of the cementing hose 4 is calculated by the following formula:

[0058] Cementing hose length = top drive lifting ring length - top drive circulation joint length - casing circulation head height + (5-10cm);

[0059] The length of the cementing hose 4 is set to 40-50 cm.

[0060] In this embodiment, the length of the entire cementing hose 4 is calculated as follows: cementing hose length = top drive lifting ring length - top drive circulation joint length - casing circulation head height + 5-10 cm; preferably, in this embodiment, the length of the cementing hose 4 is set to 40-50 cm.

[0061] The length of the cementing hose of the utility model ensures that the connection between the top drive circulation joint and the casing circulation head during drilling operations is both compact and appropriate, ensuring sufficient adjustment margin and adaptability, while avoiding operational inconvenience or connection problems caused by being too long or too short, and also reducing material waste, thereby optimizing the cost-effectiveness of the entire cementing operation.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0063] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A casing circulation device from a top drive, characterized in that: include: Top drive circulation joint (9), cementing hose (4), casing circulation head (7); One end of the top drive circulation joint (9) is connected to the top drive through a top drive square connector, and the other end is connected to one end of the cementing hose (4); The other end of the cementing hose (4) is connected to one end of the casing circulation head (7), and the other end of the casing circulation head (7) is threadedly connected to the casing.

2. The casing circulation device from top drive according to claim 1, characterized in that: Both ends of the cementing hose (4) are respectively provided with hose oil non-male connectors (3).

3. The casing circulation device from top drive according to claim 2, characterized in that: The top drive circulation joint (9) is provided with a female joint (1) at one end and a joint oil pin (2) at the other end; The female connector (1) is matched and connected with the top drive square connector; the connector oil pin (2) is connected with the hose oil pin female connector (3) provided at one end of the cementing hose (4).

4. The device for realizing casing circulation from a top drive according to claim 3, characterized in that: The length of the top drive circulation joint (9) is set to 1 m.

5. The casing circulation device from top drive according to claim 2, characterized in that: One end of the casing circulation head (7) is provided with a circulation head oil pin (5), and the other end is provided with a circulation head thread pin (8); The circulating head oil non-male buckle (5) is connected to the hose oil non-female joint (3) at one end of the cementing hose (4) away from the top drive circulating joint (9); The circulating head threaded male buckle (8) is threadedly connected to the sleeve female joint at one end of the sleeve.

6. The device for realizing casing circulation from a top drive according to claim 5, characterized in that: The casing circulation head (7) is also provided with a circulation head lifting lug (6), and the circulation head lifting lug (6) is provided at an end away from the circulation head threaded male buckle (8).

7. The casing circulation device from top drive according to claim 1, characterized in that: The length of the cementing hose (4) is calculated by the following formula: Cementing hose length = top drive lifting ring length - top drive circulation joint length - casing circulation head height + (5-10cm).

8. The device for realizing casing circulation from a top drive according to claim 7, characterized in that: The length of the cementing hose (4) is set to 40-50 cm.

Images