Double-seal wellhead device for oil and gas production

Abstract

The utility model discloses an oil and gas extraction double-seal well head device which comprises a well head device body and a polish rod capable of moving up and down, supporting rods and fixing inserting rods which are distributed at equal intervals in the circumferential direction are arranged on the outer wall of the well head device body, and an annular supporting plate is fixed to the bottom of the outer wall of the well head device body. And limiting insertion rods which are circumferentially distributed at equal intervals are arranged at the top of the supporting plate. The wellhead device has the advantages that during use, the handle is adjusted to control rotation of the fixed insertion rods, the fixed insertion rods extend and are inserted into soil, the wellhead device body can be preliminarily fixed through the four fixed insertion rods inserted into the soil, and then the four limiting insertion rods are inserted into the soil through external equipment; and the position of the wellhead device body can be fixed again, through double fixing of the wellhead device body, the wellhead device body can be effectively prevented from shaking or deviating, and therefore the influence on follow-up oil exploitation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil production equipment, in particular to a double-sealed wellhead device for oil and gas production. Background Art

[0002] In the process of oil extraction, the rod of the pumping unit needs to go through the process of upstroke and downstroke. In addition, in oil extraction, it is usually necessary to set a wellhead device at the wellhead to achieve sealing to prevent oil leakage during the oil extraction process.

[0003] After searching, the patent document with application number CN202121495152.5 discloses a double-seal wellhead device for oil and gas production, including a wellhead device body, a polished rod passing through the wellhead device body, a retaining ring fixed inside the wellhead device body, a sealing ring fixed inside the retaining ring, the polished rod passing through the sealing ring and being slidingly and sealingly connected thereto, a lower cone sleeve concentric with the retaining ring being fixed at the lower end of the retaining ring, the polished rod passing through the lower cone sleeve, the polished rod and the lower end of the lower cone sleeve are in sliding contact, an upper cone sleeve is fixed in the wellhead device body above the retaining ring, the polished rod passes through the upper cone sleeve, a conical sealing sleeve is installed in the upper cone sleeve, the polished rod passes through the sealing sleeve, and the outer edge of the polished rod is slidingly and sealingly connected to the inner edge of the sealing sleeve.

[0004] In the above-mentioned prior art, although the sealing performance is good through the cooperation of the sealing ring, the sealing sleeve and the sealing ring, and it has a double sealing effect, it can prevent oil and gas leakage, avoid oil and gas waste, avoid pollution of the surrounding environment, and have a long service life, but the outside of the wellhead device body lacks corresponding fixing measures. In the process of continuous upward and downward movement of the bare rod, if the wellhead device body does not have corresponding fixing measures, the wellhead device body may shake or shift, thereby affecting subsequent oil extraction. Therefore, a double-sealed wellhead device for oil and gas extraction is now proposed. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a double-sealed wellhead device for oil and gas production.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The double-sealed wellhead device for oil and gas production comprises a wellhead device body and a light rod that can move up and down, the outer wall of the wellhead device body is provided with support rods and fixed plug rods that are equidistantly distributed around the circumference, the bottom of the outer wall of the wellhead device body is fixed with a ring-shaped support plate, the top of the support plate is provided with a limit plug rod that is equidistantly distributed around the circumference, the outer wall of the support rod is provided with an external thread, the top of the fixed plug rod is provided with an adjusting thread groove, the support rod is threadedly connected to the adjusting thread groove, the outer wall of the fixed plug rod is symmetrically fixedly connected with an adjusting handle, the bottom of the fixed plug rod is fixedly connected with a first plug block that is conically arranged, the top of the outer wall of the support rod is provided with a first fixing hole, the inside of the first fixing hole is inserted with a fixing bolt, the outer wall of the wellhead device body is fixedly connected with a fixing plate that is equidistantly distributed around the circumference, the fixing plate is provided with a second fixing hole, and the fixing bolt passes through the second fixing hole and the first fixing hole in sequence.

[0008] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: one end of the fixing bolt is threadedly connected with a fixing nut, and one side of the fixing nut is against the fixing plate.

[0009] In order to better achieve the above-mentioned purpose, the utility model adopts a further technical solution: the top of the support plate is provided with support holes which are equidistantly distributed around the circumference, the limit rod slides through the support holes, the bottom of the limit rod is fixedly connected with a second plug block which is arranged in a conical shape, and the top of the limit rod is fixedly connected with a pull ring for removing the limit rod.

[0010] The advantages of the utility model are: when in use, the handle is adjusted to control the rotation of the fixed rod, so that the fixed rod is extended and inserted into the soil. The four fixed rods inserted into the soil can play a preliminary fixing role on the wellhead device body, and then the four limit rods are inserted into the soil through external equipment to fix the position of the wellhead device body again. Through the double fixation of the wellhead device body, the shaking or deviation of the wellhead device body can be effectively avoided, thereby avoiding the impact on subsequent oil production. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the external three-dimensional structure of the oil and gas production double-seal wellhead device proposed by the utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the connection of the fixed plug rod, the support rod and the fixed plate in the oil and gas double-seal wellhead device proposed by the utility model;

[0013] Figure 3 The utility model is a three-dimensional structural diagram of the connection between the fixing plate, the fixing bolts and the supporting rods in the double-sealed wellhead device for oil and gas production proposed by the utility model.

[0014] In the figure: 1 wellhead device body, 2 support rod, 3 fixed plug rod, 4 support plate, 5 limit plug rod, 6 adjustment thread groove, 7 adjustment handle, 8 first plug block, 9 first fixing hole, 10 fixing bolt, 11 fixing plate, 12 second fixing hole, 13 fixing nut, 14 support plug hole, 15 second plug block, 16 pull ring, 17 bare rod. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0016] Reference Figure 1-Figure 3 As shown, a double-sealed wellhead device for oil and gas production comprises a wellhead device body 1 and a polished rod 17 that can be moved up and down. The outer wall of the wellhead device body 1 is provided with support rods 2 and fixed plug rods 3 that are equidistantly distributed in a circle. A circular ring-shaped support plate 4 is fixed to the bottom of the outer wall of the wellhead device body 1. The top of the support plate 4 is provided with limit plug rods 5 that are equidistantly distributed in a circle. The wellhead device body 1 and the polished rod 17 that can be moved up and down are both prior arts, and a double sealing structure is provided inside the wellhead device body 1 to prevent oil and gas leakage. The specific structure and principle are described in the patent document proposed in the background technology: Double-sealed wellhead device for oil and gas production The wellhead device application number: CN202121495152.5 has been introduced in detail and will not be explained again. The outer wall of the support rod 2 is provided with an external thread, and the top of the fixed rod 3 is provided with an adjusting thread groove 6. The support rod 2 is threadedly connected to the adjusting thread groove 6, and the outer wall of the fixed rod 3 is symmetrically fixedly connected with an adjusting handle 7, and the bottom of the fixed rod 3 is fixedly connected with a first plug block 8 set in a cone; the adjusting handle 7 controls the rotation of the fixed rod 3, allowing the fixed rod 3 to extend and insert into the soil. Through the four fixed rods 3 inserted into the soil, the wellhead device body 1 can be initially fixed.

[0017] A first fixing hole 9 is provided at the top of the outer wall of the support rod 2, and a fixing bolt 10 is inserted into the inside of the first fixing hole 9. The outer wall of the wellhead device body 1 is fixedly connected with fixing plates 11 which are equidistantly distributed around the circumference. A second fixing hole 12 is provided on the fixing plate 11, and the fixing bolt 10 passes through the second fixing hole 12 and the first fixing hole 9 in sequence. A fixing nut 13 is threadedly connected to one end of the fixing bolt 10, and one side of the fixing nut 13 is abutted against the fixing plate 11. The top of the support rod 2 is placed between the two fixing plates 11, and then the fixing bolt 10 is inserted into the first fixing hole 9 and the second fixing hole 12 in sequence, and then the fixing nut 13 is screwed on. The support rod 2 can be installed and fixed, and it is convenient to disassemble it at the same time.

[0018] The top of the support plate 4 is provided with support holes 14 which are equidistantly distributed around the circumference. The limit rods 5 slide through the support holes 14. The four limit rods 5 are inserted into the soil through external equipment, so that the position of the wellhead device body 1 can be fixed again. The bottom of the limit rod 5 is fixedly connected to a second plug block 15 which is arranged in a cone shape, and the top of the limit rod 5 is fixedly connected to a pull ring 16 for removing the limit rod.

[0019] During use, the handle 7 is adjusted to control the rotation of the fixed rod 3, so that the fixed rod 3 is extended and inserted into the soil. The four fixed rods 3 inserted into the soil can play a preliminary fixing role on the wellhead device body 1, and then the four limit rods 5 are inserted into the soil through external equipment to fix the position of the wellhead device body 1 again. By doubly fixing the wellhead device body 1, the shaking or deviation of the wellhead device body 1 can be effectively avoided, thereby avoiding affecting the subsequent oil extraction.

Claims

1. A double-sealed wellhead device for oil and gas production, comprising a wellhead device body (1) and a polished rod (17) movable up and down, characterized in that: The outer wall of the wellhead device body (1) is provided with support rods (2) and fixed plug rods (3) which are equidistantly distributed around the circumference; a circular ring-shaped support plate (4) is fixed to the bottom of the outer wall of the wellhead device body (1); the top of the support plate (4) is provided with limit plug rods (5) which are equidistantly distributed around the circumference; the outer wall of the support rod (2) is provided with an external thread; the top of the fixed plug rod (3) is provided with an adjustment thread groove (6); the support rod (2) is threadedly connected to the adjustment thread groove (6); the outer wall of the fixed plug rod (3) is symmetrically fixedly connected to the adjustment thread groove (6); An adjustment handle (7) is connected, the bottom of the fixed plug rod (3) is fixedly connected to a first plug block (8) arranged in a conical shape, the top of the outer wall of the support rod (2) is provided with a first fixing hole (9), a fixing bolt (10) is inserted into the inside of the first fixing hole (9), the outer wall of the wellhead device body (1) is fixedly connected to fixing plates (11) distributed equidistantly around the circumference, the fixing plate (11) is provided with second fixing holes (12), and the fixing bolt (10) passes through the second fixing hole (12) and the first fixing hole (9) in sequence.

2. The double-seal wellhead device for oil and gas production according to claim 1, characterized in that: One end of the fixing bolt (10) is threadedly connected to a fixing nut (13), and one side of the fixing nut (13) abuts against the fixing plate (11).

3. The double-seal wellhead device for oil and gas production according to claim 2, characterized in that: The top of the support plate (4) is provided with support holes (14) which are equidistantly distributed around the circumference, the limit rod (5) slides through the support hole (14), the bottom of the limit rod (5) is fixedly connected to a second plug block (15) arranged in a conical shape, and the top of the limit rod (5) is fixedly connected to a pull ring (16) for removing the limit rod.

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