Oil pipe hanger

Abstract

The utility model discloses an oil pipe hanger, which relates to the technical field of oil exploitation equipment and comprises an oil pipe hanger body, a through hole is axially arranged on the oil pipe hanger body, oil pipe buckles are arranged at two ends of the through hole, a ball seat groove and a fishing neck are arranged in the middle of the through hole in parallel, and the fishing neck is arranged closer to the rear end of the oil pipe hanger body than the ball seat groove; the sealing assembly is arranged on the peripheral surface of the tubing hanger body; the ball seat bushing is arranged in the ball seat groove, and a through hole is formed in the middle of the ball seat bushing; the ball sealer can be located in the through hole of the ball seat bush through the head end of the through hole, and a buckle is arranged at one end of the ball sealer and can be connected with the lifting piece. According to the oil pipe hanger, the technical problems that the sizes of flanges of a Christmas tree are not uniform, and the pressure test operation difficulty is high are solved, and the technical effect that the pressure test operation difficulty is reduced by additionally arranging the ball seat bush is achieved.

Description

Technical Field

[0001] This utility model relates to the field of oil extraction equipment technology, and in particular to an oil pipe hanger. Background Technology

[0002] In oil extraction operations, tubing hangers play a crucial role. They not only support the weight of the tubing string but also ensure an effective seal of the annular space between the tubing and casing to prevent fluid leakage and guarantee the safety and efficiency of well operations. However, in practical applications, the inconsistent flange sizes of Christmas trees necessitate the use of pressure testing tools adapted to different flange sizes during pressure testing, increasing operational complexity.

[0003] Therefore, how to provide a tubing hanger that can adapt to oil tree flanges of different sizes is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a tubing hanger that solves the technical problems of inconsistent flange sizes in the wellhead and the high difficulty of pressure testing.

[0005] To achieve the above objectives, this utility model provides an oil pipe hanger, comprising:

[0006] The tubing hanger body has an axially extending through hole, with tubing clips at both ends of the through hole. A ball seat groove and a retrieval neck are arranged side by side in the middle of the through hole, with the retrieval neck positioned closer to the rear end of the tubing hanger body than the ball seat groove.

[0007] A sealing assembly is disposed on the outer peripheral surface of the tubing hanger body;

[0008] A ball seat bushing is disposed within the ball seat groove, and a through hole is provided in its middle;

[0009] The blocking ball can be located in the through hole of the ball seat bushing through the through hole at its head end. One end of the blocking ball is provided with a buckle, which can be connected to the lifting component.

[0010] Preferably, the sealing assembly includes:

[0011] A metal sealing ring is provided between the front end and the rear end of the tubing hanger body, and the transition outer peripheral surface is a slope. The metal sealing ring is sleeved on the transition outer peripheral surface.

[0012] The support ring and tightening nut are both located on the outer circumferential surface of the rear end of the tubing hanger body, and the metal sealing ring is fixed on the transition outer circumferential surface by the support ring.

[0013] Preferably, the tightening nut is threaded onto the outer circumferential surface of the rear end of the tubing hanger body.

[0014] Preferably, it also includes a locking screw, the tightening nut is radially provided with a first threaded hole, the outer peripheral surface of the rear end of the tubing hanger body is provided with a second threaded hole corresponding to the first threaded hole, and the tightening nut and the tubing hanger body are connected by the locking screw passing through the first threaded hole and the second threaded hole.

[0015] Preferably, the outer peripheral surface of the front end of the tubing hanger body is provided with several concave grooves.

[0016] Preferably, the outer peripheral surface of the front end of the tubing hanger body is provided with a trapezoidal groove.

[0017] Preferably, the opening of the ball seat bushing is a tapered opening.

[0018] Preferably, the ball seat bushing is fixedly connected to the ball seat groove by an O-ring.

[0019] Compared to the aforementioned background technology, the tubing hanger provided in this application, by adding an external ball seat bushing, can adapt to different sizes of plugging balls, solving the problem that the plugging ball of the tubing hanger is difficult to set when the diameter of the wellhead is small, reducing the difficulty of pressure testing. The design of the retrieval neck adapts to the size of the currently recoverable retrieval spear, making the retrieval of the tubing hanger more convenient. One end of the plugging ball is provided with a buckle, which can be connected to the lifting component, facilitating the insertion and removal of the plugging ball. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a front view of the tubing hanger provided in an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the tubing hanger body provided in an embodiment of the present utility model;

[0023] Figure 3 This is a cross-sectional view of the tubing hanger provided in an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the installation of the tubing hanger provided in an embodiment of the present invention.

[0025] in:

[0026] 1-Tubing hanger body, 2-Tubing clamp, 3-Ball seat groove, 4-Retrieving neck, 5-Ball seat bushing, 6-Sealing ball, 7-Lifting component, 8-Metal sealing ring, 9-Transition outer circumference, 10-Support ring, 11-Tightening nut, 12-Concave groove, 13-Trapezoidal groove, A-Earthwork tree, B-Tubing hanger, C-Tubing head, D-Tubing cross, E-Casing head. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] See Figures 1-3 This application provides a tubing hanger, comprising a tubing hanger body 1, which has an axially penetrating through hole, tubing clips 2 at both ends of the through hole, a ball seat groove 3 and a retrieval neck 4 arranged side by side in the middle of the through hole, the retrieval neck 4 being positioned closer to the rear end of the tubing hanger body 1 than the ball seat groove 3; a sealing assembly disposed on the outer circumferential surface of the tubing hanger body 1; a ball seat bushing 5 disposed within the ball seat groove 3, the middle of which has a through hole; and a sealing ball 6, the first end of which passes through the through hole and is located within the through hole of the ball seat bushing 5, one end of the sealing ball 6 being provided with a buckle, the buckle being connectable to a lifting component 7. Specifically, the rear end of the tubing hanger body 1 is located at... Figure 1 On the right side.

[0030] Specifically, the body 1 of the tubing hanger has an axial through hole for the tubing to pass through, and tubing clips 2 are provided at both ends of the through hole for fixing the tubing.

[0031] A ball seat groove 3 and a retrieval neck 4 are arranged side by side in the middle of the through hole. The retrieval neck 4 is located closer to the rear end of the tubing hanger body 1 than the ball seat groove 3, and can be used with the retrieval spear to retrieve the tubing hanger body 1.

[0032] The sealing assembly is located on the outer circumferential surface of the tubing hanger body 1 to ensure the sealing between the hanger and the wellhead equipment.

[0033] The ball seat bushing 5 is set in the ball seat groove 3. The end of the blocking ball 6, which can pass through the through hole, is located in the through hole of the ball seat bushing 5 to block the through hole of the ball seat bushing 5. One end of the blocking ball 6 is provided with a buckle, which can be connected to the lifting component 7 to facilitate the insertion and removal of the blocking ball 6.

[0034] See Figure 4 The specific operating steps are as follows:

[0035] S1, Original state: Wellhead is connected to casing head E of tubing cross D.

[0036] S2. Connect the oil pipe: Connect the lower part of the oil pipe hanger B to the oil pipe through the oil pipe clamp 2, and connect the upper part of the oil pipe hanger B to the lifting oil pipe through the oil pipe clamp 2.

[0037] S3. Lowering the tubing head sleeve: Using the lifting tubing, lower the tubing hanger B into the tubing head C.

[0038] S4. Lower the sealing ball and verify the sealing performance: Use the lifting component 7 to lower the sealing ball 6 to the ball seat bushing 5 through the flange diameter of the tree A. Install the pressure test joint on the instrument flange of the tree A and use the pressure test pump to perform a pressure test. If there is no pressure leakage in the surface equipment, the surface equipment is considered to be sealed.

[0039] S5. Restore the wellhead device: After the sealing inspection is qualified, lift the sealing ball 6 through the lifting component 7 to restore the wellhead device.

[0040] Therefore, the tubing hanger provided in this application can adapt to different sizes of plugging balls by adding an external ball seat bushing, which solves the problem that the plugging ball of the tubing hanger is difficult to set when the diameter of the wellhead is small, reduces the difficulty of pressure testing, and adapts to the size of the currently recoverable retrieval spear through the design of the retrieval neck, making the retrieval of the tubing hanger more convenient.

[0041] Specifically, the tubing clip 2 is 130mm or 180mm in size, which allows the tubing hanger to be well-fitted with a variety of existing tubing heads.

[0042] Based on the above embodiments, the sealing assembly includes a metal sealing ring 8, a transition outer peripheral surface 9 is provided between the front end and the rear end of the tubing hanger body 1, the transition outer peripheral surface 9 is an inclined surface, and the metal sealing ring 8 is sleeved on the transition outer peripheral surface 9; the support ring 10 and the tightening nut 11 are both provided on the rear end outer peripheral surface of the tubing hanger body 1, and the metal sealing ring 8 is fixed on the transition outer peripheral surface 9 by the support ring 10.

[0043] Specifically, the metal sealing ring 8 is used to ensure a tight connection between the tubing hanger and the wellhead equipment. The metal sealing ring 8 has high strength and corrosion resistance, and can withstand harsh working environments such as high temperature and high pressure.

[0044] The transition outer peripheral surface 9 is a beveled structure between the front and rear ends of the tubing hanger body 1, which makes it easier for the metal sealing ring 8 to be fitted onto the tubing hanger body 1 and form a good sealing effect.

[0045] The support ring 10 is located on the outer peripheral surface of the rear end of the tubing hanger body 1 to ensure that the metal sealing ring 8 can be firmly fixed on the transition outer peripheral surface 9, preventing it from loosening or falling off during use.

[0046] The tightening nut 11 is a fastener used to secure the support ring 10 and the metal sealing ring 8. By rotating the tightening nut 11, it can be tightly connected to the tubing hanger body 1, thereby securing the metal sealing ring 8 and the support ring 10.

[0047] Specifically, the ball seat groove 3 has a size of 60mm, and the ball seat bushing has a size of 50mm.

[0048] Based on the above embodiment, the tightening nut 11 is threadedly connected to the outer peripheral surface of the rear end of the tubing hanger body 1. Specifically, the outer peripheral surface of the rear end of the tubing hanger body 1 is designed with a threaded groove that matches the tightening nut 11, and the inner wall of the tightening nut 11 is correspondingly provided with threads that mesh with the threaded groove. During installation, simply screw the tightening nut 11 into the threaded groove of the tubing hanger body 1 and tighten it appropriately to achieve a secure connection between the two.

[0049] This application also provides another embodiment, which includes a locking screw and a tightening nut 11 radially provided with a first threaded hole. The outer peripheral surface of the rear end of the tubing hanger body 1 is provided with a second threaded hole corresponding to the first threaded hole. The tightening nut 11 and the tubing hanger body 1 are connected by the locking screw passing through the first threaded hole and the second threaded hole. Specifically, the outer peripheral surface of the rear end of the tubing hanger body 1 is pre-drilled with a second threaded hole corresponding to the first threaded hole on the tightening nut 11 according to the design requirements. The position, size and depth of the above threaded hole need to ensure that the locking screw can pass through smoothly and be effectively tightened.

[0050] During installation, screw the locking screw into the first and second threaded holes until it is fully tightened. The tightness of the locking screw should be adjusted according to actual needs to ensure that it provides sufficient tightening force while avoiding over-tightening that could damage the threads or cause the locking screw to break.

[0051] Based on the above embodiments, the outer peripheral surface of the front end of the tubing hanger body is provided with a plurality of concave grooves 12, and the outer peripheral surface of the front end of the tubing hanger body is provided with trapezoidal grooves 13, and the trapezoidal grooves 13 are located between adjacent concave grooves 12.

[0052] Specifically, the concave groove 12 allows the O-ring to fit tightly against the inner wall of the tubing cross, improving the sealing performance. The trapezoidal groove 13 is located between adjacent concave grooves 12 and, through its cooperation with the set screw, enables the tubing hanger to be fixed inside the tubing cross.

[0053] Based on the above embodiments, the opening of the ball seat bushing 5 is a conical opening, and the ball seat bushing 5 is fixedly connected to the ball seat groove 3 by an O-ring. Specifically, the opening of the ball seat bushing 5 is designed to be conical, which facilitates the blocking of the ball 6 from entering the through hole of the ball seat bushing 5.

[0054] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0055] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A tubing hanger, characterized in that, include: The tubing hanger body (1) has an axial through hole, and tubing clips (2) are provided at both ends of the through hole. A ball seat groove (3) and a retrieval neck (4) are arranged side by side in the middle of the through hole. The retrieval neck (4) is located closer to the rear end of the tubing hanger body (1) than the ball seat groove (3). A sealing assembly is provided on the outer peripheral surface of the tubing hanger body (1); A ball seat bushing (5) is provided in the ball seat groove (3), and a through hole is provided in the middle of it; The blocking ball (6) can be located in the through hole of the ball seat bushing (5) through the first end of the through hole. One end of the blocking ball (6) is provided with a buckle, which can be connected to the lifting component (7).

2. The tubing hanger according to claim 1, characterized in that, The sealing assembly includes: A metal sealing ring (8) is provided between the front end of the tubing hanger body (1) and the rear end of the tubing hanger body (1). The transition outer peripheral surface (9) is an inclined surface, and the metal sealing ring (8) is sleeved on the transition outer peripheral surface (9). The support ring (10) and the tightening nut (11) are both located on the outer peripheral surface of the rear end of the tubing hanger body (1), and the metal sealing ring (8) is fixed on the transition outer peripheral surface (9) by the support ring (10).

3. The tubing hanger according to claim 2, characterized in that, The tightening nut (11) is threaded onto the outer circumferential surface of the rear end of the tubing hanger body (1).

4. The tubing hanger according to claim 2, characterized in that, It also includes a locking screw, the tightening nut (11) is radially provided with a first threaded hole, and the outer peripheral surface of the rear end of the tubing hanger body (1) is provided with a second threaded hole corresponding to the first threaded hole. The tightening nut (11) and the tubing hanger body (1) are connected by the locking screw passing through the first threaded hole and the second threaded hole.

5. The tubing hanger according to claim 1, characterized in that, The front end outer peripheral surface of the tubing hanger body (1) is provided with several concave grooves (12).

6. The tubing hanger according to claim 5, characterized in that, The front end outer peripheral surface of the tubing hanger body (1) is provided with a trapezoidal groove (13).

7. The tubing hanger according to claim 1, characterized in that, The opening of the ball seat bushing (5) is a conical opening.

8. The tubing hanger according to claim 7, characterized in that, The ball seat bushing (5) is fixedly connected to the ball seat groove (3) by an O-ring.

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