A sea directional drilling pipe crossing operation system and method

Abstract

The application discloses a kind of sea directional drilling pipeline crossing operation system and method.It relates to offshore pipeline construction technical field, including: drilling platform;Supporting component, including support rod and telescopic rod, the top of support rod and telescopic rod are hinged with the bottom of drilling platform;Drilling system, including external ring frame, hydraulic travelling mechanism, drilling machine and rotary power mechanism, external ring frame is set on drilling platform, hydraulic travelling mechanism is set multiple, hydraulic travelling mechanism, drilling machine and rotary power mechanism are set in external ring frame, and rotary power mechanism is set on hydraulic travelling mechanism, rotary power mechanism is connected with drilling machine;Pipeline clamping mechanism, set in the side of external ring frame away from drilling machine.The application is telescopic by telescopic rod, and the height and angle of drilling platform are adjusted by cooperating support rod;By setting pipeline clamping mechanism, the pipeline pushed into borehole is clamped;Directional drilling, reaming and pipeline laying are all completed on single side, and the degree of integration is high.

Description

Technical Field

[0001] This invention relates to the field of offshore pipeline construction technology, and more specifically to a system and method for offshore directional drilling pipeline crossing operations. Background Technology

[0002] Currently, horizontal directional drilling land-sea crossing technology is mainly used for land-based drainage pipelines entering the sea, offshore wind farm submarine cables landing, and oil and gas pipeline landing, and the demand is large.

[0003] However, nearshore marine ecological protection red lines are set up, and excavation is strictly prohibited. Construction sites are restricted: environmental protection requirements for sites in marine ecological red line areas are high, and the size of construction sites is limited; extreme weather such as typhoons, cold waves, heavy fog, and thunderstorms occur frequently at sea, resulting in harsh construction environments and short construction windows; conventional non-excavation horizontal directional drilling crossing technology requires auxiliary drilling rigs, and there needs to be a barge or offshore platform to place the auxiliary drilling rigs at sea.

[0004] Therefore, how to provide a marine directional drilling pipeline crossing operation system and method with minimal environmental impact, high safety and convenient maintenance is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a system and method for directional drilling pipeline crossing operations in the sea, which aims to solve one of the problems in the background art mentioned above, with minimal environmental impact, high safety and convenient maintenance.

[0006] To achieve the above objectives, the present invention provides a system for offshore directional drilling pipeline crossing operations, comprising:

[0007] Drill into the platform;

[0008] The support assembly includes a support rod and a telescopic rod. The tops of both the support rod and the telescopic rod are hinged to the bottom of the drilling platform. The telescopic rod extends and retracts in conjunction with the support rod to adjust the height and angle of the drilling platform.

[0009] The drilling system includes an outer ring frame, a hydraulic traveling mechanism, a drilling rig, and a rotary power mechanism. The outer ring frame is disposed on the drilling platform. Multiple hydraulic traveling mechanisms are disposed, each of which is movably disposed within the outer ring frame. The drilling rig and the rotary power mechanism are sequentially disposed within the outer ring frame, and the rotary power mechanism is disposed on the hydraulic traveling mechanism and connected to the drilling rig.

[0010] A pipe clamping mechanism is provided on the side of the outer ring frame away from the drilling rig, and the pipe pushed into the borehole is clamped by the pipe clamping mechanism.

[0011] Furthermore, the outer ring frame includes a base, enclosing plates, and a locking bolt. Two enclosing plates are provided, and both enclosing plates are hinged to the base to form an enclosure. The top of the outer ring frame is opened by the hinge of the enclosing plates to the base. The locking bolt is located at the top connection position of the two enclosing plates and is used to lock and close the outer ring frame.

[0012] Furthermore, both the base and the enclosure plate are provided with racks, and multiple hydraulic travel mechanisms are provided on the racks, and multiple hydraulic travel mechanisms travel on the racks.

[0013] Furthermore, the pipe clamping mechanism is provided with a latch, which is correspondingly provided with the locking insert.

[0014] Furthermore, the hydraulic travel mechanism is connected to the rotary power mechanism and the pipe clamping mechanism by bolts.

[0015] On the other hand, the present invention provides a method for offshore directional drilling pipeline crossing operations, using the above-described offshore directional drilling pipeline crossing operation system, including:

[0016] Step 1: Determine the location of the drilling platform and install support rods at the bottom of the drilling platform;

[0017] Step 2: Drive the tree root stakes into the ground from the bottom of the support pole to prepare the foundation for the drilling platform;

[0018] Step 3: Install the telescopic rod at the bottom of the drilling platform, adjust the angle of the drilling platform, and drive the tree root stake into the ground from the bottom of the telescopic rod to fix it.

[0019] Step 4: Install the outer ring frame;

[0020] Step 5: Open the outer ring frame and install the hydraulic travel mechanism and slewing power mechanism;

[0021] Step Six: Install the drilling rig and connect it to the rotary power mechanism;

[0022] Step 7: Install the sleeve to isolate the shallow, defective underlying layer;

[0023] Step 8: Construct the pilot hole using a drilling rig;

[0024] Step 9: Drive the drilling rig through the rotary power mechanism to complete the forward hole reaming;

[0025] Step 10: After drilling, install the pipe clamping mechanism and close the outer ring frame by locking the insertion bolt;

[0026] Step 11: The prefabricated pipes are pushed into the borehole in sections and held by the pipe clamping mechanism to complete the pipe laying.

[0027] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a system and method for directional drilling pipeline crossing operations. The system uses telescopic rods for extension and retraction, and supports the support rods to adjust the height and angle of the drilling platform. A pipeline clamping mechanism is set up to clamp the pipeline pushed into the borehole. The system requires less ground space and has less environmental impact. The drilling system has a stable foundation and high safety. Directional drilling, borehole enlargement, and pipeline laying are all completed on one side, resulting in a high degree of integration, high efficiency, and convenient maintenance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 The process flow diagram of the offshore directional drilling pipeline crossing operation system provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the drilling platform provided by the present invention;

[0031] Figure 3 A schematic diagram of the structure of the tree root pile, hydraulic travel mechanism, and rotary power mechanism provided by the present invention;

[0032] Figure 4 A schematic diagram of the drilling system and drilling platform provided by the present invention;

[0033] Figure 5 Cross-sectional views of the hydraulic travel mechanism and the rotary power mechanism;

[0034] Figure 6 This is a cross-sectional view of the pipe clamping mechanism provided by the present invention.

[0035] Wherein: 1 is the drilling platform; 2 is the support rod; 3 is the telescopic rod; 4 is the drilling system; 5 is the outer ring frame; 51 is the base; 52 is the enclosure plate; 53 is the locking insertion bolt; 54 is the rack; 6 is the hydraulic travel mechanism; 7 is the drilling rig; 8 is the rotary power mechanism; 9 is the pipe clamping mechanism; 91 is the buckle; 10 is the pipe; 11 is the tree root pile; 12 is the ground; 13 is the steel cable. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] See Figure 1-6 This invention discloses a system for offshore directional drilling pipeline crossing operations, comprising:

[0038] Drilling into platform 1;

[0039] The support assembly includes a support rod 2 and a telescopic rod 3. The tops of both the support rod 2 and the telescopic rod 3 are hinged to the bottom of the drilling platform 1. The height and angle of the drilling platform 1 are adjusted by the telescopic rod 3 in conjunction with the support rod 2. The ground 12 occupies less space and has less environmental impact.

[0040] The drilling system 4 includes an outer ring frame 5, a hydraulic traveling mechanism 6, a drilling rig 7, and a rotary power mechanism 8. The outer ring frame 5 is mounted on the drilling platform 1. Multiple hydraulic traveling mechanisms 6 are provided, and each hydraulic traveling mechanism 6 can be movably mounted within the outer ring frame 5. The drilling rig 7 and the rotary power mechanism 8 are sequentially mounted within the outer ring frame 5, with the rotary power mechanism 8 mounted on the hydraulic traveling mechanism 6 and connected to the drilling rig 7. The rotary power mechanism 8 drives the drilling rig 7 to rotate, completing drilling and forward reaming. By setting up the drilling system 4, directional drilling, reaming, and pipeline laying are all completed on one side, resulting in high integration, high efficiency, and convenient maintenance.

[0041] The pipe clamping mechanism 9 is located on the side of the outer ring frame away from the drilling rig 7. The pipe 10 pushed into the borehole is clamped by the pipe clamping mechanism 9. The frictional resistance between the pipe 10 and the pipe clamping mechanism 9 is increased by the circumferential clamping force, thereby pushing the pipe 10 into the borehole.

[0042] In this embodiment, the outer ring frame 5 includes a base 51, a surrounding plate 52, and a locking bolt 53. Two surrounding plates 52 are provided, and both surrounding plates 52 are hinged to the base 51 to form a enclosure. The hinge between the surrounding plates 52 and the base 51 allows the top of the outer ring frame 5 to be opened. The locking bolt 53 is located at the top connection position of the two surrounding plates 52, and the outer ring frame 5 is locked closed by locking the bolt 53. The top of the outer ring frame 5 can be rotated open to facilitate drilling.

[0043] In this embodiment, racks 54 are provided on both the base 51 and the enclosure plate 52, and multiple hydraulic travel mechanisms 6 are provided on the racks 54, and the multiple hydraulic travel mechanisms 6 travel on the racks 54.

[0044] In this embodiment, a latch 91 is provided on the pipe clamping mechanism 9, and the latch 91 is correspondingly provided with the locking insertion bolt 53. The pipe clamping mechanism 9 clamps the pipe 10 by providing the latch 91.

[0045] In this embodiment, the hydraulic travel mechanism 6 is connected to the rotary power mechanism 8 and the pipe clamping mechanism 9 by bolts.

[0046] On the other hand, the present invention provides a method for offshore directional drilling pipeline crossing operations, using the above-mentioned offshore directional drilling pipeline crossing operation system, including:

[0047] Step 1: Determine the position of drilling platform 1, and install support rod 2 at the bottom of drilling platform 1;

[0048] Step 2: Drive the tree root stake 11 into the ground 12 from the bottom of the support rod 2 to prepare the foundation for the drilling platform 1;

[0049] Step 3: Adjust the bottom of the drilling platform 1 to install the telescopic rod 3, adjust the angle of the drilling platform 1, and similarly drive the tree root stake 11 into the ground 12 from the bottom of the telescopic rod 3 for fixation;

[0050] Step 4: Install the outer ring frame 5;

[0051] Step 5: Open the outer ring frame 5 and install the hydraulic travel mechanism 6 and the rotary power mechanism 8;

[0052] Step Six: Install the drilling rig 7 and connect it to the rotary power mechanism 8;

[0053] Step 7: Install the sleeve to isolate the shallow, defective underlying layer;

[0054] Step 8: Construct the pilot hole using drilling rig 7;

[0055] Step 9: Drive the drilling rig 7 through the rotary power mechanism 8 to complete the forward hole reaming;

[0056] Step 10: After drilling, install the pipe clamping mechanism 9 and close the outer ring frame 5 by locking the insertion bolt 53;

[0057] Step 11: The prefabricated pipe 10 is pushed into the borehole in sections and held by the pipe clamping mechanism 9, thus completing the pipe laying.

[0058] In addition, in this embodiment, a steel cable 13 is provided between the drilling platform 1 and the support rod 2 and the telescopic rod 3 to improve the stability of the connection.

[0059] It also includes tree root piles 11, with multiple tree root piles 11 installed at the bottom of the support rod 2 and the telescopic rod 3, and the tree root piles 11 are driven into the ground 12; the tree root piles 11 improve the stability of the drilling system 4 foundation and enhance its safety; after the construction of the tree root piles 11 is completed, they can serve as the foundation for the permanent connection base of the pipeline on land and sea.

[0060] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for directional drilling pipeline crossing operations in the sea, characterized in that, include: Drill into the platform; The support assembly includes a support rod and a telescopic rod. The tops of both the support rod and the telescopic rod are hinged to the bottom of the drilling platform. The telescopic rod extends and retracts in conjunction with the support rod to adjust the height and angle of the drilling platform. The drilling system includes an outer ring frame, a hydraulic traveling mechanism, a drilling rig, and a rotary power mechanism. The outer ring frame is disposed on the drilling platform. Multiple hydraulic traveling mechanisms are disposed, each of which is movably disposed within the outer ring frame. The drilling rig and the rotary power mechanism are sequentially disposed within the outer ring frame, and the rotary power mechanism is disposed on the hydraulic traveling mechanism and connected to the drilling rig. A pipe clamping mechanism is provided on the side of the outer ring frame away from the drilling rig, and the pipe pushed into the borehole is clamped by the pipe clamping mechanism. The outer ring frame includes a base, enclosing plates, and locking bolts. Two enclosing plates are provided, and both enclosing plates are hinged to the base to form an enclosure. The top of the outer ring frame is opened by the hinge of the enclosing plates to the base. The locking bolts are located at the top connection position of the two enclosing plates and are used to lock and close the outer ring frame.

2. The offshore directional drilling pipeline crossing system according to claim 1, characterized in that, Both the base and the enclosure plate are provided with racks, and multiple hydraulic travel mechanisms are provided on the racks, and multiple hydraulic travel mechanisms travel on the racks.

3. The offshore directional drilling pipeline crossing system according to claim 1, characterized in that, The pipe clamping mechanism is provided with a latch, which is correspondingly provided with the locking insert.

4. A directional drilling pipeline crossing system according to claim 3, characterized in that, The hydraulic travel mechanism is connected to the rotary power mechanism and the pipe clamping mechanism by bolts.

5. A method for offshore directional drilling pipeline crossing operations, based on the offshore directional drilling pipeline crossing operation system according to any one of claims 1-4, characterized in that, include: Step 1: Determine the location of the drilling platform and install support rods at the bottom of the drilling platform; Step 2: Drive the tree root stakes into the ground from the bottom of the support pole to prepare the foundation for the drilling platform; Step 3: Install the telescopic rod at the bottom of the drilling platform, adjust the angle of the drilling platform, and drive the tree root stake into the ground from the bottom of the telescopic rod to fix it. Step 4: Install the external ring frame on the drilling platform; Step 5: Open the outer ring frame and install the hydraulic travel mechanism and slewing power mechanism; Step Six: Install the drilling rig and connect it to the rotary power mechanism; Step 7: Install the sleeve to isolate the shallow, defective underlying layer; Step 8: Construct the pilot hole using a drilling rig; Step 9: Drive the drilling rig through the rotary power mechanism to complete the forward hole reaming; Step 10: After drilling, install the pipe clamping mechanism and close the outer ring frame by locking the insertion bolt; Step 11: The prefabricated pipes are pushed into the borehole in sections and held by the pipe clamping mechanism to complete the pipe laying.

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