Guide head for radial horizontal well and well completion tool

Abstract

The utility model relates to a guide head and a well completion tool for a radial horizontal well, the guide head comprises an adapter piece and a guide piece, the adapter piece comprises a first hinge part, and a plurality of through holes are formed in the first hinge part. The guide piece comprises a second hinge part hinged to the first hinge part. And the second hinge part is constructed to enable part of the through hole to be exposed when the axis of the guide piece intersects with the axis of the adapter piece, so that fluid with pressure can be sprayed out through the exposed through hole. The fluid in the adapter is ejected from the unblocked through hole, so that the guide head is driven to move forwards in the hoistway along the axial direction of the guide piece, a bent hoistway wall or a convex obstacle is effectively avoided, and the guide head is prevented from being blocked in time. In addition, an elastic piece is further arranged between the adapter piece and the guide piece, the elastic piece can enable the guide head to reset to the first state from the second state in time, and therefore the trafficability of the guide head in the hoistway is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of well completion, and particularly relates to a guide head and a well completion tool for a radial horizontal well. Background Art

[0002] Well completion refers to the last step in the process of oil and gas drilling. A well completion tool is a general term for related devices that connect the oil and gas interlayers in an oil and gas well to artificial pipeline equipment, including a guide head that plays a guiding role when lowering the connecting device.

[0003] A radial horizontal well is a wellbore drilled radially along the main well. Since the direction is continuously changed during the drilling process, the wellbore of the radial horizontal well is not completely straight, thus increasing the difficulty of sending the well completion tool into the radial horizontal well. In the prior art, the guide head mainly uses a conical or spherical front end for guiding. However, in the actual construction process, there is still a risk that the guide head gets stuck. Summary of the Utility Model

[0004] Based on the above problems existing in the prior art, the utility model provides a guide head for a radial horizontal well, which can avoid the guide head from getting stuck. At the same time, the utility model also provides a well completion tool for a radial horizontal well including the guide head.

[0005] In the first aspect of the utility model, a guide head for a radial horizontal well is provided, which includes an adapter configured to communicate with a conveying pipeline for conveying fluid under pressure, and includes a first hinge portion on which a plurality of through holes are formed; and

[0006] a guide member including a second hinge portion hinged to the first hinge portion,

[0007] wherein, when the axes of the guide member and the adapter intersect, the second hinge portion is configured to expose some of the through holes, so that the fluid under pressure can spray out through the exposed through holes.

[0008] Further, the plurality of through holes are uniformly arranged along the circumferential direction of the first hinge portion.

[0009] Further, the adapter further includes a main body connected to the first hinge portion and a connecting portion provided on the main body, and the connecting portion is configured to be connected to the conveying pipeline.

[0010] Further, the guide member further includes a flow guiding portion provided at the rear end of the second hinge portion, the inner surface of the flow guiding portion is configured as a flow guiding surface for restricting the fluid spraying direction, and the outer surface of the flow guiding portion is configured as an annular cutting surface for reducing the circumferential dimension of the guide head.

[0011] Further, the guiding member further includes a guiding portion provided at the front end of the second hinged portion. A reinforcing portion with a solid structure is provided at the end of the guiding portion. The reinforcing portion extends towards the adapter and forms a groove between the guiding portion and the adapter.

[0012] Further, the guiding head further includes an elastic member disposed between the guiding member and the adapter. The elastic member is configured to reset the guiding head from a state where the axes of the guiding member and the adapter intersect to a state where the axes of the guiding member and the adapter coincide.

[0013] Further, the elastic member is a spring, and the spring is pre-assembled between the guiding member and the adapter.

[0014] Further, a mounting seat is provided on the end face of the guiding member. One end of the spring is sleeved outside the mounting seat, and the other end of the spring is installed in the groove.

[0015] Further, an extension portion is further provided between the second hinged portion and the guiding portion. The extension portion is configured to provide an installation space for the elastic member.

[0016] A second aspect of the present invention provides a completion tool, including the guiding head described in any one of the above.

[0017] The beneficial effects of the present invention are as follows: A guiding head for a radial horizontal well provided by the present invention includes an adapter and a guiding member for communicating with a conveying pipeline for conveying fluid under pressure. The adapter includes a first hinged portion, and a plurality of through holes are provided in the first hinged portion. The guiding member includes a second hinged portion hinged to the first hinged portion. Among them, the second hinged portion is configured to expose some of the through holes when the axes of the guiding member and the adapter intersect, so that the fluid under pressure can be ejected through the exposed through holes. The fluid in the adapter is ejected from the unblocked through holes, thereby driving the guiding head to move forward along the axial direction of the guiding member in the wellbore, effectively avoiding the bent wellbore wall or protruding obstacles, and further avoiding the guiding head from being stuck in time. In addition, an elastic member is further provided between the adapter and the guiding member, and the elastic member can reset the guiding head from the second state to the first state in time, thereby further improving the passing performance of the guiding head in the wellbore. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 The figure shows a schematic structural view of a guiding head for a radial horizontal well in a first state from one perspective.

[0020] Figure 2 As shownFigure 1 Partial structural sectional view of the guide head for a radial horizontal well in the first state from another perspective.

[0021] Figure 3 As shown Figure 1 Schematic diagram of the guide head for a radial horizontal well in the second state from another perspective.

[0022] Among them, the reference numerals in the figures: 100, guide head; 10, adapter; 11, main body; 12, connecting part; 13, first hinge part; 131, through hole; 132, mounting seat;

[0023] 20, guide member; 21, second hinge part; 22, diversion part; 221, diversion surface; 222, annular cutting surface; 23, guiding part; 231, strengthening part; 232, groove; 24, extension part;

[0024] 30, elastic member. Detailed implementation mode

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic way, so it only shows the components related to the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Refer to Figure 1 and Figure 2 As shown in

[0027] Combined with Figure 2 and Figure 3As shown, the adapter 10 is generally a tubular structure with one end open. The adapter 10 includes a main body 11, a connecting portion 12 provided at one end of the main body 11, and a first hinge portion 13 provided at the other end of the main body 11. The connecting portion 12 is used to connect with the conveying pipeline, and the first hinge portion 13 is used to be hinged with the guide member 20.

[0028] In some embodiments, the connection between the connecting portion 12 and the conveying pipeline can be snap connection or screw connection. In this embodiment, the connection between the connecting portion 12 and the conveying pipeline is screw connection. Threads are provided on the inner wall or outer wall of the connecting portion 12.

[0029] In some embodiments, the outer wall of the first hinge portion 13 protrudes radially outward in an arc shape. A plurality of through holes 131 are provided at one end of the first hinge portion 13 close to the main body 11, and the plurality of through holes 131 are uniformly arranged along the circumferential direction of the first hinge portion 13.

[0030] Combined Figure 2 As shown, the guide member 20 is also generally a tubular structure with one end open. The guide member 20 includes a second hinge portion 21 sleeved outside the first hinge portion 13, a diversion portion 22 provided at one end of the second hinge portion 21 close to the adapter 10, and a guide portion 23 provided at the end of the hinge portion away from the adapter 10.

[0031] In some embodiments, the inner diameters at both ends of the second hinge portion 21 are smaller than the outer diameter of the portion with the largest curvature of the first hinge portion 13, so as to form an axial limit between the second hinge portion 21 and the first hinge portion 13. In one preferred embodiment, the curvature of the inner wall of the second hinge portion 21 is the same as the curvature of the outer wall of the first hinge portion 13, and the arc length of the inner wall of the second hinge portion 21 is smaller than the arc length of the outer wall of the first hinge portion 13.

[0032] In some embodiments, the guide portion 23 is conical or spherical, which improves the passability of the guide member 20 and reduces the risk of the guide member 20 being stuck in the shaft.

[0033] In some of these embodiments, a reinforcing portion 231 is further provided at the end of the guide portion 23, and the reinforcing portion 231 is a solid structure. The reinforcing portion 231 can improve the strength of the end of the guide portion 23 and prevent the guide portion 23 from being damaged due to multiple collisions with the shaft wall or obstacles.

[0034] In some embodiments, the inner surface of the diversion portion 22 is a diversion surface 221, and the diversion surface 221 is a frustum surface. The diversion surface 221 can constrain the direction of the fluid ejected from the through holes 131, thereby improving the propulsion effect of the guide head 100. The outer surface of the diversion portion 22 is an annular cutting surface 222. The annular cutting surface 222 can reduce the outer diameter of the diversion portion 22, and further reduce the circumferential dimension of the guide head 100, improving the passability of the guide head 100.

[0035] Combined with Figure 2 As shown, in a specific embodiment, when the axes of the guide member 20 and the adapter member 10 are collinear, the guide head 100 is in the first state. That is, the guide member 20 and the adapter member 10 are in the same direction, and the second hinge portion 21 can block a plurality of through holes 131. Under the pushing action of the conveying pipeline at the distal end, the guide head 100 moves forward along the axial direction of the guide member 20 in the wellbore.

[0036] Combined with Figure 3 As shown, when the axes of the guide member 20 and the adapter member 10 intersect, the guide head 100 is in the second state. That is, the guide member 20 touches the bent wellbore wall or the protruding obstacle and deflects relative to the adapter member 10, and the second hinge portion 21 only blocks some of the through holes 131 facing the deflected side of the guide member 20. The pressurized liquid in the conveying pipeline can be ejected from the unblocked through holes 131 on the side away from the deflected side of the guide member 20. Under the action of the diversion portion 22, the ejected liquid moves backward. Under the reaction force of the ejected liquid, the guide head 100 can move forward along the axial direction of the guide member 20 in the wellbore, effectively avoiding the bent wellbore wall or the protruding obstacle, realizing the turning of the guide head 100 in the wellbore, and timely preventing the guide head 100 from being stuck.

[0037] It can be understood that in another specific embodiment, when the guide head 100 is in the first state, that is, when the axes of the guide member 20 and the adapter member 10 are collinear, the second hinge portion 21 does not block a plurality of through holes 131. The pressurized liquid can be ejected from the plurality of through holes 131, thereby increasing the forward speed of the guide head 100 in the wellbore.

[0038] When the guide head 100 is in the second state, that is, when the guide member 20 deflects relative to the adapter member 10 so that their axes intersect, the second hinge portion 21 only blocks some of the through holes 131. The pressurized liquid can be ejected from the unblocked through holes 131, enabling the guide head 100 to move forward along the axial direction of the guide member 20 in the wellbore. Similarly, the turning of the guide head 100 in the wellbore is realized, and the guide head 100 is prevented from being stuck.

[0039] Combined with again Figure 2 As shown, the guide head 100 further includes an elastic member 30 disposed between the guide member 20 and the adapter member 10. The elastic member 30 can timely reset the deflected guide member 20, so that the axes of the guide member 20 and the adapter member 10 can be collinear again, and further enable the guide head 100 to move forward normally in the wellbore.

[0040] In some embodiments, the elastic member 30 can be a spring, a leaf spring or a rod spring. The elastic member 30 can enable the guiding head 100 to reset from the second state to the first state in a timely manner. When the guiding head 100 is in the second state, that is, when the guiding member 20 is deflected relative to the adapter 10, the elastic member 30 is bent and deformed. When the guiding member 20 leaves the bent wellbore wall or the protruding obstacle, the elastic member 30 returns to its original state. During this process, the elastic member 30 drives the guiding member 20 to deflect, so that the axis of the guiding member 20 coincides with the axis of the adapter 10 again. At this time, the guiding head 100 resets to the first state again.

[0041] Combined with Figure 2 As shown, in a specific embodiment, the elastic member 30 is a spring. An installation seat 132 for installing the spring is provided on the end face of the first hinge portion 13 of the adapter 10. The reinforcing portion 231 of the guiding member 20 extends towards the installation seat 132, so as to form a groove 232 between the reinforcing portion 231 and the guiding portion 23. One end of the spring is sleeved outside the installation seat 132, and the other end of the spring is installed in the groove 232. In one preferred embodiment, the spring is installed between the guiding member 20 and the adapter 10 in a pre-compressed assembly manner to improve the bending stiffness of the spring, so that the guiding member 20 can be reset in a timely manner.

[0042] In a specific embodiment, an extension portion 24 is further provided between the second hinge portion 21 and the guiding portion 23 to ensure that there is sufficient space between the guiding member 20 and the adapter 10 for installing the elastic member 30.

[0043] The beneficial effect of a guiding head 100 for a radial horizontal well provided by the present utility model is that a guiding head 100 is provided, which includes an adapter 10 and a guiding member 20. The adapter 10 includes a first hinge portion 13, and a plurality of through holes 131 are formed in the first hinge portion 13. The guiding member 20 includes a second hinge portion 21 hinged to the first hinge portion 13. Wherein, when the guiding member 20 is in the second state, the second hinge portion 21 is configured to be able to block part of the through holes 131. The fluid in the adapter 10 is ejected from the unblocked through holes 131, so as to drive the guiding head 100 to move forward along the axis of the guiding member 20 in the wellbore, thereby effectively avoiding the bent wellbore wall or the protruding obstacle, and further avoiding the guiding head 100 from being stuck in a timely manner. In addition, an elastic member 30 is further provided between the adapter 10 and the guiding member 20. The elastic member 30 can enable the guiding head 100 to reset from the second state to the first state in a timely manner, thereby further improving the passing performance of the guiding head 100 in the wellbore.

[0044] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0046] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant workers can completely make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A guide head for radial horizontal wells, characterized in that: include The adapter (10) is configured to communicate with a conveying pipeline for conveying pressurized fluid, and comprises a first hinged portion (13), wherein the first hinged portion (13) is provided with a plurality of through holes (131); and The guide member (20) comprises a second hinged portion (21) hingedly connected to the first hinged portion (13), The second hinged portion (21) is configured to expose a portion of the through hole (131) when the axes of the guide member (20) and the adapter member (10) intersect, thereby allowing pressurized fluid to be ejected through the exposed through hole (131).

2. The guide head for radial horizontal wells according to claim 1, characterized in that: The plurality of through holes (131) are evenly arranged along the circumference of the first hinged portion (13).

3. The guide head for radial horizontal wells according to claim 1, characterized in that: The adapter (10) further comprises a main body (11) connected to the first hinged portion (13) and a connecting portion (12) arranged on the main body (11), wherein the connecting portion (12) is configured to be connected to the conveying pipeline.

4. The guide head for radial horizontal wells according to claim 3, characterized in that: The guide member (20) further comprises a guide portion (22) arranged at the rear end of the second hinged portion (21), the inner surface of the guide portion (22) being configured as a guide surface (221) for constraining the fluid injection direction, and the outer surface of the guide portion (22) being configured as an annular section (222) for reducing the circumferential dimension of the guide head (100).

5. The guide head for radial horizontal wells according to claim 4, characterized in that: The guide member (20) further comprises a guide portion (23) arranged at the front end of the second hinged portion (21); a reinforcing portion (231) of a solid structure is arranged at the end of the guide portion (23); the reinforcing portion (231) extends in the direction of the adapter (10) to form a groove (232) between the reinforcing portion (23) and the guide portion (23).

6. The guide head for radial horizontal wells according to claim 5, characterized in that: The guide head (100) further comprises an elastic member (30) arranged between the guide member (20) and the adapter member (10), wherein the elastic member (30) is configured to enable the guide head (100) to be reset from a state in which the axes of the guide member (20) and the adapter member (10) intersect to a state in which the axes of the guide member (20) and the adapter member (10) coincide.

7. The guide head for radial horizontal wells according to claim 6, characterized in that: The elastic member (30) is a spring, and the spring is pre-compressed and assembled between the guide member (20) and the adapter member (10).

8. The guide head for radial horizontal wells according to claim 7, characterized in that: A mounting seat (132) is provided on the end surface of the guide member (20), one end of the spring is sleeved outside the mounting seat (132), and the other end of the spring is mounted in the groove (232).

9. The guide head for radial horizontal wells according to claim 6, characterized in that: An extension portion (24) is also provided between the second hinge portion (21) and the guide portion (23), and the extension portion (24) is configured to provide an installation space for the elastic member (30).

10. A completion tool for radial horizontal wells, characterized in that: It comprises the guide head (100) according to any one of claims 1 to 9.

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