CN206458383U - Expansion cone - Google Patents

Abstract

The utility model discloses an expansion cone, which comprises a connecting rod, a hydraulic cylinder, a first connecting head, a second connecting head, two or more than two first cone blocks, two or more than two second cone blocks, a launching chamber and an expansion pipe, wherein the connecting rod is a sleeve, the connecting rod is arranged in the expansion pipe, the hydraulic cylinder, the first connecting head, the first cone block, the second cone block and the second connecting head are sequentially connected between the outer wall of the connecting rod and the inner wall of the expansion pipe from the first end to the second end of the connecting rod, and the second connecting head is connected with the launching chamber; each first cone block is suitable for entering between two adjacent second cone blocks, so that the first cone blocks and the second cone blocks form a cylindrical structure and expand one section of the expansion pipe; the connecting rod is provided with a liquid inlet hole, and the second end of the connecting rod is communicated with the launching chamber. The utility model provides a complete tubular structure is constituteed after the first cone piece and the second cone piece of expansion cone extrude each other, and the inner wall is cylindric after the expansion pipe inflation.

Description

an expanding cone

technical field

The utility model relates to the technical field of oil and gas exploitation, in particular to an expansion cone.

Background technique

Expansion cone is a tool commonly used in petroleum drilling to obtain a larger borehole diameter. Under the extrusion of the expansion cone, the expansion tube undergoes permanent deformation to obtain a larger diameter oil and gas well.

After extrusion of the commonly used expansion cone at present, the split lobes of the expansion cone are separated, so that the outer diameter increases.

In the process of realizing the utility model, the designer finds that the prior art has at least the following problems:

After the outer diameter of the currently used expansion cone is increased, it cannot be combined into a complete cylindrical structure, and there are gaps between the segments, resulting in an incomplete cylindrical structure on the inner wall of the expansion tube after expansion, so that the operating tools cannot be smoothly lowered into the well .

Utility model content

In view of this, the utility model provides an expansion cone. After the outer diameter of the expansion cone is increased, it is combined into a complete cylindrical structure, so that the inner wall of the expansion tube is a complete cylindrical structure after expansion.

Specifically, the utility model provides an expansion cone, including a connecting rod, a liquid cylinder, a first connecting head, a second connecting head, two or more first cone blocks, two or more The second cone block, launch chamber and expansion tube, wherein,

The connecting rod is a sleeve, the connecting rod is placed in the expansion tube, between the outer wall of the connecting rod and the inner wall of the expansion tube from the first end to the second end of the connecting rod The liquid cylinder, the first connection head, the first cone block, the second cone block, and the second connection head are connected in sequence, and the second connection head is connected to the firing chamber;

Each first cone block is suitable to enter between two adjacent second cone blocks, so that the two or more first cone blocks and the two or more second cone blocks form a a cylindrical structure and expands a section of said expansion tube;

The connecting rod is provided with a liquid inlet hole, the second end of the connecting rod communicates with the firing chamber, and the liquid entering from the first end of the connecting rod is suitable for entering the liquid through the liquid inlet hole. cylinder while entering the firing chamber from the second end of the connecting rod;

The hydraulic cylinder is configured to be suitable for pushing the first connecting head to move toward the second end of the connecting rod along the axial direction of the connecting rod, thereby pushing the first cone block to move, and the firing chamber is It is configured to be suitable for pushing the second connecting head to move toward the first end of the connecting rod along the axial direction of the connecting rod, thereby pushing the second cone block to move.

Optionally, the first connecting head is connected to the connecting rod, and when the first connecting head moves, it drives the connecting rod to move.

Optionally, each of the first cone blocks and each of the second cone blocks is connected with a plug-in plate.

Optionally, the first connector is provided with first grooves, the number of the first grooves is the same as the number of the first cone blocks, and the inserting plate on the first cone blocks is clamped on the In the first groove and suitable for moving in the first groove, the second connector is provided with a second groove, the number of the second groove is the same as the number of the second cone block Similarly, the inserting plate on the second cone block is locked in the second groove and is suitable for moving in the second groove.

Optionally, each first cone block is provided with a first track, and each second cone block is provided with a second track that cooperates with the first track, and each of the first cone blocks is suitable for The second track enters between two adjacent second cone blocks.

Optionally, there are two or more liquid inlet holes, and the two or more liquid inlet holes are evenly distributed on the circumference of the section of the connecting rod perpendicular to the axis of the connecting rod.

Optionally, a first annular groove is provided on the outer wall of the first connector, a second annular groove is provided on the outer wall of the second connector, and the first annular groove and the second An O-ring is arranged in the annular groove.

Optionally, the launch chamber includes two circular baffles, the two circular baffles form a cavity with the inner wall of the expansion tube, the first circular baffle is connected to the second connection head, The second circular baffle is fixed inside the expansion tube, and the first circular baffle is adapted to be pushed by the liquid to move toward the first end of the connecting rod when the liquid flows into the launching chamber.

Optionally, threads are provided on the inner wall near the first end of the connecting rod.

Optionally, the expansion cone further includes a hemispherical bottom plug, and a planar portion of the hemispherical bottom plug is connected to the firing chamber.

The beneficial effect of the technical scheme that the utility model embodiment provides is:

When using the expansion cone provided by the utility model, the expansion cone is lowered into the well, and after reaching the predetermined position, the fluid is injected from the first end of the connecting rod, and the fluid enters the liquid cylinder through the liquid inlet hole, and at the same time, the fluid is injected from the first connecting rod. The second end flows into the launch chamber. When the pressure of the liquid entering the hydraulic cylinder reaches a certain value, the hydraulic cylinder moves toward the second end of the connecting rod along the axial direction of the connecting rod, and the movement of the hydraulic cylinder pushes the first connector to move, and then the first connector pushes the two And more than two first cones move, and then the first cone and the second cone squeeze each other, and each first cone enters between two adjacent second cones, so that two or two The above first cone block and two or more second cone blocks form a complete cylindrical structure, and the expansion cone is opened to expand the expansion tube. Continue to inject fluid from the first end of the connecting rod. When the pressure of the liquid in the firing chamber reaches a certain value, the firing chamber pushes the second connecting head to move toward the first end of the connecting rod along the axial direction of the connecting rod, and the second connecting head The movement of the first cone and the second cone move to the first end of the connecting rod at the same time, so that the other section of the expansion tube expands, and the firing chamber continues to move towards the first end of the connecting rod, so that each section of the expansion tube expands . Since the first cone block and the second cone block are extruded together to form a complete cylindrical structure, there is no gap between the cone blocks, so the inner wall of the expansion tube is cylindrical after expansion, which will not affect subsequent construction operations.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. For example, those of ordinary skill in the art can also obtain other drawings based on these drawings on the premise of not paying creative efforts.

Fig. 1 is the structural representation of a kind of expansion cone in an embodiment of the utility model;

Fig. 2 is a schematic structural view of a part of an expansion cone in an embodiment of the present invention;

Fig. 3 is a schematic diagram when the expansion cone is opened in an embodiment of the utility model;

Fig. 4 is a schematic diagram of expanding the expansion pipe by the expansion cone in an embodiment of the present invention.

The reference signs in the figure represent respectively:

1. Connecting rod; 2. Inlet hole; 3. Liquid cylinder; 4. O-ring; 5. First connector; 6. First groove; 7. First cone; 8. Expansion tube; 9 1, the second cone block; 10, the second groove; 11, the O-ring; 12, the second connector; 13, the launch chamber; 14, the hemispherical bottom plug; 17, the second track; 18, the board.

detailed description

In order to make the technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

This embodiment provides an expansion cone, as shown in Figure 1, including a connecting rod 1, a liquid cylinder 3, a first connecting head 5, a second connecting head 12, two or more first cone blocks 7, Two or more second cone blocks 9, firing chambers 13 and expansion tubes 8, wherein the connecting rod 1 is a sleeve, the connecting rod 1 is placed in the expansion tube 8, and the outer wall of the connecting rod 1 and the expansion tube 8 From the first end to the second end of the connecting rod 1, there are sequentially connected a liquid cylinder 3, a first connecting head 5, two or more first cone blocks 7, two or more The second cone block 9, the second connection head 12, the second connection head 12 is connected with the firing chamber 13; each first cone block 7 is suitable for entering between two adjacent second cone blocks 9, so that the two And more than two first cone blocks 7 and two or more second cone blocks 9 form a cylindrical structure and expand a section of the expansion tube 8; the connecting rod 1 is provided with a liquid inlet hole 2, and the connecting rod The second end of 1 communicates with the firing chamber 13, and the liquid entering from the first end of the connecting rod 1 is suitable for entering the liquid cylinder 3 from the liquid inlet hole 2, and at the same time enters the firing chamber 13 from the second end of the connecting rod 1; the liquid cylinder 3 is set to be suitable for pushing the first connecting head 5 to move toward the second end of the connecting rod 1 along the axial direction of the connecting rod 1, thereby pushing the first cone block 7 to move, and the firing chamber 13 is set to be suitable for pushing the second connecting rod 1 The head 12 moves toward the first end of the connecting rod 1 along the axial direction of the connecting rod 1 , and then pushes the second cone block 9 to move.

When the expansion cone provided by the utility model is used, the expansion cone is lowered into the well, and after reaching the predetermined position, the fluid is injected from the first end of the connecting rod 1, and the fluid enters the liquid cylinder 3 through the liquid inlet hole 2, and simultaneously flows from the first The second end of the connecting rod 1 flows into the firing chamber 13 . When the pressure of the liquid entering the hydraulic cylinder 3 reaches a certain value, the hydraulic cylinder 3 moves toward the second end of the connecting rod 1 along the axial direction of the connecting rod 1, and the movement of the hydraulic cylinder 3 pushes the first connecting head 5 to move, and the first The connecting head 5 pushes two or more first cone blocks 7 to move, and then the first cone blocks 7 and the second cone blocks 9 squeeze each other, and each first cone block 7 enters two adjacent second cone blocks. Between blocks 9, so that two or more first cone blocks 7 and two or more second cone blocks 9 form a complete cylindrical structure, the expansion cone opens and expands the expansion tube 8, as shown in the figure 3. Continue to inject fluid from the first end of the connecting rod 1. When the pressure of the liquid in the firing chamber 13 reaches a certain value, the firing chamber 13 pushes the second connecting head 12 to the first end of the connecting rod 1 along the axial direction of the connecting rod 1. end movement, the movement of the second connecting head 12 pushes the first cone block 7 and the second cone block 9 to move toward the first end of the connecting rod 1 at the same time, and then expands the other section of the expansion tube, and the firing chamber 13 continues to move toward the connecting rod 1 The first end of the expansion tube is moved to expand each section of the expansion tube, as shown in Figure 4. Since the first cone block 7 and the second cone block 9 are extruded to form a complete cylindrical structure, there is no gap between the cone blocks, so the inner wall of the expansion tube 8 is cylindrical after expansion, which will not affect subsequent construction operations .

In this embodiment, the number of the first conical block 7 and the second conical block 9 may be the same, and one first conical block 7 enters between the two second conical blocks 9 after mutual extrusion. Since the gap between the second cone blocks 9 is smaller than the width of the first cone block 7, after the first cone block 7 enters the second cone block 9, the diameter of the formed cylindrical structure will become larger, so that the expansion tube A section swells.

In this embodiment, as shown in FIG. 2 , the width of the part of the first conical block 7 and the second conical block 9 connected to the first connector 5 and the second connector 12 may be greater than that away from the second connector 12 In this way, the first cone block 7 can more easily enter the gap between the second cone blocks 9, and the second cone block 9 can more easily enter the gap between the first cone blocks 7. The middle parts of the first cone block 7 and the second cone block 9 are combined together to form a cylindrical structure. After the first cone block 7 enters between the second cone blocks 9, the outer diameter of the cylindrical structure formed by the middle part of the first cone block 7 and the second cone block 9 is greater than the inner diameter of the expansion tube 8, so that the expansion tube 8 for a stretch.

As an improvement of this embodiment, the first connecting head 5 is connected to the connecting rod 1 , and when the first connecting head 5 moves, it drives the connecting rod 1 to move. Specifically, the first connecting head 5 can be connected to the connecting rod 1 through threads, and when the first connecting head 5 moves, it drives the connecting rod 1 to move, so that the liquid inlet hole 2 is always in communication with the liquid cylinder 3 .

As an improvement of this embodiment, as shown in FIG. 1 and FIG. 2 , each first cone block 7 is connected with a flashboard 15 , and each second cone block 9 is connected with a flashboard 18 .

As an improvement of this embodiment, as shown in Figure 1 and Figure 2, the first connecting head 5 is provided with first grooves 6, the number of the first grooves 6 is the same as the number of the first cone blocks 7, the first A plug plate on the cone block 7 is stuck in the first groove 10 and is suitable for moving in the first groove 10, the second connector 12 is provided with the second groove 10, the number of the second groove 10 The number of the second cone blocks 9 is the same, and the inserting plate on the second cone block 9 is clamped in the second groove 10 and is suitable for moving in the second groove 10 .

In this embodiment, as shown in Figure 2, the first groove 6, the second groove 10, the board 15, and the board 18 can all be "T" shaped, and the board 15 is stuck in the first groove 6 , the plugboard 18 is stuck in the second groove 10 . When the first cone block 7 and the second cone block 9 are pressed against each other, the flashing plate 15 and the flashing plate 18 move in the direction close to the inner wall of the expansion tube 8 in the first groove 6 and the second groove 10 respectively, so as to be adjacent to each other. The distance between the two first cone blocks 7 and the adjacent two second cone blocks 9 increases, and the first cone blocks 7 and the second cone blocks 9 can be embedded in each other. But the utility model is not limited thereto, and the first groove 6, the second groove 10, the board 15, and the board 18 can all be "L" or other shapes.

As an improvement of this embodiment, as shown in FIG. 2, a first track 16 can be set on each first cone block 7, and a second track cooperating with the first track 16 can be set on each second cone block 9. 17 , each first cone block 7 is adapted to enter between two adjacent second cone blocks 9 along the second track 17 . Concretely, the first track 16 is arranged on the two edges of the first cone block 7, the second track 17 is arranged on the two edges of the second cone block 9, the first track 16 can be set as a groove, and the second The track 17 is set as a protrusion matching the groove, so that when the first cone block 7 enters between the two second cone blocks 9, the first track 16 is stuck outside the second track 17, and the first cone block 7 moves along the The direction of the second track 17 enters between the two second cone blocks 9 . But the utility model is not limited thereto, and the first track 16 can also be set as a protrusion, and the second track 17 can be set as a groove matching the protrusion.

As an improvement of this embodiment, there may be two or more liquid inlet holes 2, and the two or more liquid inlet holes 2 are evenly distributed on the circumference of the cross section of the connecting rod 1 perpendicular to its axis. In this way, when the liquid in the connecting rod 1 flows out through the liquid inlet hole 2, the inner wall of the connecting rod 1 is evenly stressed to ensure its stable operation.

As an improvement of this embodiment, a first annular groove can be provided on the outer wall of the first connector 5, a second annular groove can be provided on the outer wall of the second connector 12, and the first annular groove can be provided with O O-ring 4, and an O-ring 11 is arranged in the second annular groove. The O-shaped sealing ring can ensure a good seal between the first connector 5 and the second connector 12 and the inner wall of the expansion tube 8. During the movement of the first connector 5 and the second connector 12, the expansion tube 8 exercise together.

As an improvement of this embodiment, the launch chamber 13 may include two circular baffles, the two circular baffles form a cavity with the inner wall of the expansion tube 8, and the first circular baffle is connected to the second connection head 12 , the second circular baffle is fixed inside the expansion tube, and the first circular baffle is suitable for being pushed by the liquid to move toward the first end of the connecting rod 1 when the liquid flows into the firing chamber 13 . When the pressure of the liquid in the firing chamber 13 reaches a certain value, it will push the first circular baffle to move in the direction of the first end of the connecting rod 1, and the first circular baffle will push the second connecting head 12, the first cone The block 7, the second cone block 9, the first connecting head 5, the liquid cylinder 3, and the connecting rod 1 move together to the first end of the connecting rod 1, so that other unexpanded parts of the expansion tube 8 expand.

As an improvement of this embodiment, threads can be provided on the inner wall near the first end of the connecting rod 1 . The thread is engaged with the external thread of the drill rod, so that the drill rod can be connected with the connecting rod 1 through the thread.

As an improvement of this embodiment, as shown in FIG. 1 , the expansion cone further includes a hemispherical bottom plug 14 , and the plane part of the hemispherical bottom plug 14 is connected with the firing chamber 13 . Such a design can make the expansion cone easier to lower into the well. But the utility model is not limited thereto, and the bottom plug 14 can also be designed as a conical shape, and one end with a larger outer diameter is connected with the firing chamber.

The above description is only for those skilled in the art to understand the technical solution of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. a kind of expansion cone, it is characterised in that including connecting rod, fluid cylinder, the first connector, the second connector, two and two The first cone block, two and more than two second cone blocks, bay and expansion tube above, wherein,

The connecting rod is sleeve, and the connecting rod is placed in the expansion tube, outer wall and the expansion in the connecting rod From the first end of the connecting rod to being connected with the fluid cylinder, first connection the second end in turn between the inwall of pipe Head, the first cone block, the second cone block, second connector, second connector are connected with the bay；

Each first cone block is adapted to enter between two adjacent second cone blocks, so that described two and more than two first Cone block and described two and more than two second cone block composition cylinder-like structures simultaneously make one section of the expansion tube to expand；

Inlet opening is provided with the connecting rod, the second end of the connecting rod is connected with the bay, from the connecting rod First end enter liquid be suitable to from the inlet opening enter the fluid cylinder, while entering institute from the second end of the connecting rod State bay；

The fluid cylinder is arranged to be suitable to promote first connector along the connecting rod axially to the of the connecting rod Two end motions, and then the first cone block motion is promoted, the bay is arranged to be suitable to promote the second connector edge Axial the first end motion to the connecting rod of the connecting rod, and then promote the second cone block motion.

2. expansion cone according to claim 1, it is characterised in that first connector is connected with the connecting rod, when During the first connector motion, the connecting rod motion is driven.

3. expansion cone according to claim 1, it is characterised in that on each first cone block and each second cone block It is connected with a plate.

4. expansion cone according to claim 3, it is characterised in that the first groove, institute are provided with first connector The quantity for stating the first groove is identical with the quantity of the described first cone block, and the plate on the first cone block is stuck in institute first and states groove It is interior and suitable for being moved in first groove, the second groove, the number of second groove are provided with second connector Amount is identical with the quantity of the described second cone block, and the plate on the second cone block is stuck in second groove and suitable for described Moved in second groove.

5. expansion cone according to claim 1, it is characterised in that be provided with the first track on each first cone block, often The second track coordinated with first track is provided with one second cone block, each described first cone block fits along institute The second track is stated between two the second adjacent cone blocks.

6. expansion cone according to claim 1, it is characterised in that the inlet opening is two or more, two or More than two inlet openings are evenly distributed in the cross-sectional periphery vertical with the axis of the connecting rod of the connecting rod.

7. expansion cone according to claim 1, it is characterised in that be provided with the first ring on the outer wall of first connector The second annular groove, the first annular groove and second ring are provided with connected in star, the outer wall of second connector O-ring seal is provided with connected in star.

8. expansion cone according to claim 1, it is characterised in that the bay includes two circular baffle plates, described two Individual circular baffle plate and the inwall composition cavity of the expansion tube, the first circular baffle plate are connected with second connector, the second circle Shape baffle plate is fixed on inside the expansion tube, and first circular baffle plate is suitable to when liquid is flow in the bay, by liquid Body promotes the direction of the first end to the connecting rod to move.

9. expansion cone according to claim 1, it is characterised in that set on the inwall near the first end of the connecting rod There is screw thread.

10. the expansion cone according to claim 1-9 any of which, it is characterised in that the expansion cone also includes hemisphere Shape bottom is blocked up, and the stifled planar section in the hemispherical bottom is connected with the bay.