Deep and far sea offshore wind power exploration drill rod posture keeping system

Abstract

The utility model discloses a deep and far sea offshore wind power exploration drill rod posture keeping system which comprises a pile casing pipe and a drill rod, and further comprises a drill rod butt joint deviation rectifying device and a drill rod drilling posture keeping device, the drill rod butt joint deviation rectifying device comprises a stepped shaft capable of being connected with the pile casing pipe in an inserted mode, and the axis of the stepped shaft is provided with an inserting hole matched with the drill rod in an inserted mode. The drill rod drilling posture keeping device comprises a disc inserted into the pile casing pipe, an inner hole matched with the drill rod in an inserted mode is formed in the center of the disc, a plurality of containing grooves are formed in the outer side of the disc in the radial direction, balls are placed in the containing grooves and can roll in the containing grooves, and the outer sides of the balls are exposed to make contact with the wall of the pile casing pipe all the time. The system not only can improve the butt joint speed of the drill rod, but also can effectively prevent collision between the active drill rod and the pile casing in the drilling process and reduce the bending speed of the drill rod, so that the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to a drilling operation in a deep-sea offshore wind power exploration process, in particular to a deep-sea offshore wind power exploration drill rod posture maintaining system. Background Art

[0002] In order to build a strong maritime nation and achieve "carbon peak and carbon neutrality", my country has planned and constructed a large number of offshore wind power projects in recent years, and has gradually developed into the deep sea. The deep sea operation environment is characterized by deep water and thick surface mud layer. Before drilling, the casing and sleeve need to be lowered from the drilling rig platform until they are stably supported on the seabed; however, compared with the water depth and drilling depth, the total length of the drill pipe during drilling is too large, and the verticality of the drill pipe cannot be maintained, which inevitably leads to the bending of the drill pipe, causing collision and vibration with the casing and sleeve, and when docking or pulling the drill pipe, there is a large deviation from the docking position of the active drill pipe, which requires manual correction. In this way, the life of the drilling equipment and the operating efficiency will be greatly affected. Utility Model Content

[0003] The purpose of the utility model is to provide a deep-sea offshore wind power exploration drill rod posture maintaining system to solve the problem that the verticality of the drill rod cannot be maintained during the deep-sea offshore wind power exploration, resulting in the drill rod bending, causing collision and vibration between the drill rod and the casing, and a large deviation from the drill rod docking position when docking or pulling the drill rod.

[0004] The utility model is realized through the following technical solutions.

[0005] A deep-sea offshore wind power exploration drill pipe attitude maintaining system comprises a casing sleeve, a drill pipe, and also comprises a drill pipe docking correction device and a drill pipe drilling attitude maintaining device. The drill pipe docking correction device comprises a stepped shaft plugged into the casing sleeve, the axis center is provided with a socket for inserting and cooperating with the drill pipe, and the drill pipe drilling attitude maintaining device comprises a disc inserted into the casing sleeve, the center is provided with an inner hole that can be inserted into and cooperate with the drill pipe, and the outer side is provided with a plurality of receiving grooves along the radial direction, and balls are placed in the receiving grooves and can roll in the receiving grooves, and the outer side of the balls is exposed and always in contact with the casing sleeve wall.

[0006] Furthermore, the socket is provided with threads for being threadedly connected with the drill rod.

[0007] Furthermore, the stepped shaft is composed of a large shaft with a diameter larger than the outer diameter of the casing sleeve and a small shaft with a clearance fit with the casing sleeve, and the cross section is T-shaped.

[0008] Furthermore, the stepped shaft is in the form of two-petal butt joint.

[0009] Furthermore, the inner hole is provided with threads for threaded connection with the drill rod.

[0010] Furthermore, there are 8 containing grooves evenly distributed along the circumference of the disc.

[0011] The beneficial effects of the utility model are:

[0012] During the drilling process of long drill pipes, the system can not only increase the drill pipe docking speed, but also enhance the verticality of the connection positions of adjacent drill pipes, minimize the deflection of the drill pipe, and thus increase the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the system structure of the utility model;

[0014] Figure 2 This is a structural schematic diagram of a drill pipe docking correction device;

[0015] Figure 3 It is a structural schematic diagram of a device for maintaining the drilling posture of a drill rod;

[0016] Figure 4 A cross-sectional view of a ball and a receiving groove of a drilling posture maintaining device for a drill rod;

[0017] Figure 5 A top view of the ball and receiving groove of the drill rod drilling posture maintaining device.

[0018] In the figure: 1-drill rod; 2-docking correction device; 21-large shaft; 22-small shaft; 23-jacket; 3-casing; 4-drill rod drilling posture maintaining device; 41-disc; 42-inner hole; 43-receiving groove; 44-ball. DETAILED DESCRIPTION

[0019] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. The described embodiments only serve as an explanation and should not limit the utility model.

[0020] like Figure 1-5As shown, a drill pipe attitude maintaining system for deep-sea offshore wind power exploration comprises a drill pipe 1, a casing sleeve 3, a drill pipe docking correction device 2 and a drill pipe drilling attitude maintaining device 4, wherein the drill pipe docking correction device 2 comprises a stepped shaft plugged into the casing sleeve 3, the axis center is provided with a socket 23 for inserting and cooperating with the drill pipe 1, the drill pipe drilling attitude maintaining device 4 comprises a disc 41 inserted into the casing sleeve 3, the center of the disc 41 is provided with an inner hole 42 capable of inserting and cooperating with the drill pipe 1, a plurality of receiving grooves 43 are radially provided on the outer side of the disc 41, a ball 44 is placed in the receiving groove 43 and the ball 44 can roll in the receiving groove 43, and the outer side of the ball 44 is exposed to always contact with the wall of the casing sleeve 3.

[0021] The drill rod 1 can be a drill rod or an active drill rod. The outer wall of the drill rod 1 is provided with a thread that matches the inner hole 42 of the disc.

[0022] The drill rod docking correction device 2 can improve the efficiency of drill rod docking. The drill rod drilling posture maintaining device 4 is used to connect the active drill rod or the adjacent drill rod, which can effectively prevent the collision between the active drill rod and the casing during drilling and slow down the bending speed of the drill rod, thereby improving the service life of the equipment. This system is suitable for deep water and deep hole drilling conditions in deep sea offshore wind power surveys.

[0023] As an optional embodiment, the stepped shaft is composed of a large shaft 21 having a diameter larger than the outer diameter of the casing sleeve 3 and a small shaft 22 having a clearance fit with the casing sleeve 3, and has a T-shaped cross section. Specifically, the diameter of the large shaft 21 is the same as the outer diameter of the casing sleeve 3.

[0024] As an optional embodiment, the insertion hole 23 is provided with threads and is threadedly connected to the drill rod 1 .

[0025] As an optional embodiment, the stepped shaft is in the form of two butt-jointed pieces, which are naturally squeezed tight under the action of their own weight, thereby ensuring flexible disassembly during actual use without increasing the number of operating steps and time.

[0026] As an optional embodiment, the inner hole 42 is provided with threads and is threadedly connected to the drill rod 1 .

[0027] As an optional embodiment, the receiving grooves 43 are evenly distributed along the circumference of the disc, and the number is not limited. Specifically, 8 receiving grooves 43 are arranged at equal intervals. The size of the receiving groove 43 is designed to ensure that the radial size allows the outer side of the ball 44 to always contact the wall of the casing sleeve 3, that is, the distance between the outer side of the ball 44 and the center of the disc 41 is greater than the outer diameter of the disc 41, so as to reduce the wear of the drill rod 1 on the casing sleeve 3 during the drilling process and ensure smooth drilling. The radius of the receiving groove 43 is slightly different from the radius of the ball 44, ensuring that after the device enters the soil layer, the gap between the two will not be blocked by soil.

[0028] The working process of the utility model is as follows: after the casing 3 is lowered, the drill rod drilling posture maintaining device 4 is fixed to the middle part of the drill rod 1 by means of threads and is sent into the casing 3; when the total length of the drill rod after docking reaches the drilling depth requirement, the drill rod docking correction device 2 is plugged into the top of the casing 3, and the active drill rod or drill rod which is also equipped with the drill rod docking correction device 2 is docked with the drill rod and tightened.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A deep sea offshore wind power exploration drill pipe attitude maintenance system, comprising a casing and a drill pipe, characterized in that: The drill rod docking correction device and the drill rod drilling posture maintaining device are included. The drill rod docking correction device includes a stepped shaft plugged into the casing, and the axis center is provided with a socket for inserting the drill rod. The drill rod drilling posture maintaining device includes a disc inserted into the casing, and the center is provided with an inner hole that can cooperate with the drill rod insertion, and the outer side is provided with a plurality of receiving grooves along the radial direction. Balls are placed in the receiving grooves and can roll in the receiving grooves. The outer side of the balls is exposed and always in contact with the wall of the casing.

2. The deep sea offshore wind power exploration drill pipe attitude maintaining system according to claim 1, characterized in that: The socket is provided with threads and is connected with the drill pipe threads.

3. The deep sea offshore wind power exploration drill pipe attitude maintaining system according to claim 1, characterized in that: The stepped shaft is composed of a large shaft whose diameter is larger than the outer diameter of the casing sleeve and a small shaft which has a clearance fit with the casing sleeve, and has a T-shaped cross section.

4. The deep sea offshore wind power exploration drill pipe attitude maintaining system according to claim 3, characterized in that: The stepped shaft is in the form of two-piece butt joint.

5. The deep sea offshore wind power exploration drill pipe attitude maintaining system according to claim 1, characterized in that: The inner hole is provided with threads and connected with the drill pipe threads.

6. The deep sea offshore wind power exploration drill pipe attitude maintaining system according to claim 1, characterized in that: There are 8 holding slots evenly distributed along the circumference of the disc.

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