Multifunctional energy-saving wellhead sealing device

Abstract

The utility model belongs to oil well sealing device technical field discloses a kind of multifunctional energy-saving wellhead sealing device. Its main technical features are: including bottom sealing mechanism and the biasing seat located above the bottom sealing mechanism, connecting sleeve is provided above the biasing seat, second spiral sealing member is provided inside the connecting sleeve, compression ring is provided above the second spiral sealing member, bottom bowl is provided in the receiving pipe, the biasing seat is located above the bottom bowl, first spiral sealing member is provided above the first bowl, sealing end cover is provided above the first spiral sealing member and is threadedly connected with the connecting sleeve, the service life of spiral sealing member is extended, the sealing performance between spiral sealing member and polished rod is increased, and the leakage of crude oil is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to oil well sealing device technical field especially relates to a multi -functional energy -conserving well mouth sealing device. BACKGROUND

[0002] In the process of oil well work, in order to prevent the light pole in the process of moving up and down, crude oil flows out from the oil well along the light pole, causes the waste of crude oil and causes the pollution to the environment, needs to set up the well mouth sealing device on the light pole outside the well mouth. The well mouth sealing device currently used includes bottom sealing mechanism and the biasing seat located above the bottom sealing mechanism, the bottom sealing mechanism includes the connecting clamp located below, the receiving pipe located above and the sealing cavity located between the connecting clamp and the receiving pipe, the blowout preventer rubber core connected with the adjusting wheel through the lead screw is arranged in the sealing cavity, the bottom bowl is arranged in the biasing seat, the biasing seat is located above the bottom bowl, the connecting sleeve is arranged above the biasing seat, the second bowl is arranged in the connecting sleeve, the second spiral sealing piece is arranged above the second bowl, the pressure ring is arranged above the second spiral sealing piece, the first bowl is arranged above the pressure ring, the first spiral sealing piece is arranged above the first bowl, the sealing end cover is arranged above the first spiral sealing piece and is screwed with the connecting sleeve, the first lock nut is arranged on the connecting sleeve below the sealing end cover, and the second lock nut is arranged outside the biasing seat below the connecting sleeve. Due to the structure, the well mouth sealing device has the following defects: first, in order to prevent the leakage of crude oil from the inner wall surface of the first spiral sealing piece and the second spiral sealing piece and the outer surface of the light pole, the inner wall surface of the first spiral sealing piece and the second spiral sealing piece and the outer surface of the light pole are in close contact, so that the light pole reciprocatingly rubs against the inner wall surface of the first spiral sealing piece and the second spiral sealing piece during the movement of the light pole up and down, thereby shortening the service life of the first spiral sealing piece and the second spiral sealing piece, and the production efficiency is reduced when the first spiral sealing piece and the second spiral sealing piece are replaced; second, the first spiral sealing piece is directly placed above the first bowl, and the first bowl cannot move up and down during the movement of the light pole up and down, so that the upper end of the first spiral sealing piece rubs against the light pole, the first spiral sealing piece is driven by the light pole to move downward, but the lower end of the first spiral sealing piece cannot move downward due to the limitation of the first bowl, the rubbing distance between the upper end of the first spiral sealing piece and the light pole is greater than that between the lower end of the first spiral sealing piece and the light pole, and the lower end of the first spiral sealing piece is severely worn, causing crude oil leakage. SUMMARY

[0003] The utility model solves the technical problem to provide a multi -functional energy -conserving well mouth sealing device that long in service life, plugging effect is good, uses safety.

[0004] In order to solve the above problems, the utility model discloses a multifunctional energy-saving wellhead sealing device which adopts the technical scheme of comprising a bottom sealing mechanism and a deviation adjusting seat located above the bottom sealing mechanism.

[0005] Its additional technical features are:

[0006] A second pressure spring is arranged below the second bowl, and a second grease hole is arranged on the side wall of the deviation adjusting seat corresponding to the second pressure spring.

[0007] A sealing rubber ring is arranged on the side surface below the deviation adjusting seat corresponding to the bottom bowl.

[0008] A plastic layer is arranged on the threaded surface radially inside the first lock nut and the second lock nut.

[0009] The deviation adjusting seat comprises a swing seat located above the bottom bowl and a swing rod located above the swing seat, and a light rod hole is arranged in the swing rod and the swing seat, the swing seat is a drum-shaped body, and the central axis of the light rod hole of the swing seat deviates from the central axis of the swing seat.

[0010] Compared with the prior art, the multifunctional energy-saving wellhead sealing device has the following advantages:

[0011] One, because it includes the bottom sealing mechanism and the biasing seat located above the bottom sealing mechanism, the bottom sealing mechanism includes the connecting clamp located below, the receiving tube located above and the sealing cavity located between the connecting clamp and the receiving tube, the blowout preventer rubber core connected with the adjusting wheel through the screw is arranged in the sealing cavity, the bottom bowl is arranged in the biasing seat, the biasing seat is located above the bottom bowl, the connecting sleeve is arranged above the biasing seat, the second bowl is arranged inside the connecting sleeve, the second spiral seal is arranged above the second bowl, the pressure ring is arranged above the second spiral seal, the first bowl is arranged above the pressure ring, the first spiral seal is arranged above the first bowl, the sealing end cover is arranged above the connecting sleeve and is screwed, the first lock nut is arranged below the connecting sleeve of the sealing end cover, the second lock nut is arranged outside the biasing seat below the connecting sleeve, the first pressure spring is arranged between the pressure ring and the first bowl, the first grease hole is arranged on the connecting sleeve corresponding to the first pressure spring, so that the diameter of the polished rod is slightly smaller than the inner diameter of the first spiral seal and the second spiral seal, the grease seal is achieved between the polished rod and the first spiral seal and the second spiral seal, the friction between the polished rod and the first spiral seal and the second spiral seal is reduced, the service life of the first spiral seal and the second spiral seal is prolonged, the energy consumption is reduced, the energy saving effect is obvious, and the sealing performance is greatly improved, so that the crude oil is prevented from seeping out from the first spiral seal and the second spiral seal of the polished rod, during the downward movement of the polished rod, the first pressure spring below the first spiral seal is compressed downward under force, the first spiral seal is buffered downward, the first spiral seal and the first bowl move downward with the compression of the first pressure spring, the grease is located in the first pressure spring, during the downward movement of the polished rod, the pressure of the grease located in the first pressure spring increases, the squeezed grease moves along the polished rod and the first spiral seal with the upward and downward movement of the polished rod, so that the grease is more uniform, the sealing performance of the polished rod and the first spiral seal is better, and the grease is injected into the first pressure spring through the first grease hole after a period of use;

[0012] Second, because the second pressure spring is arranged below the second bowl, the second grease hole is arranged on the side wall of the biasing seat corresponding to the second pressure spring; during the downward movement of the polished rod, the second pressure spring below the second spiral seal is compressed downward under force, the friction between the polished rod and the second spiral seal is reduced, and the sealing performance is enhanced;

[0013] Third, because the sealing rubber ring is arranged on the side surface below the biasing seat corresponding to the bottom bowl, the sealing performance is further improved, and the crude oil is prevented from seeping out from between the bottom bowl and the biasing seat;

[0014] Fourthly, the plastic layer arranged on the threaded surface radially inside the first lock nut and the second lock nut further improves the sealing performance at the first lock nut and the second lock nut;

[0015] Fifthly, since the biasing adjusting base comprises a swing base above the bottom supporting bowl and a swing rod above the swing base, the swing rod hole is arranged in the swing rod and the swing base, the swing base is a drum-shaped body, the central axis of the swing rod hole of the swing base deviates from the central axis of the swing base, the position of the swing rod hole can be adjusted by rotating the swing base, and the position of the swing rod hole can be adjusted by rotating the swing rod, so that the adjustment is more accurate and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure schematic view of the multifunctional energy-saving wellhead sealing device;

[0017] Figure 2 It is a structure schematic view of the multifunctional energy-saving wellhead sealing device with the second pressure spring;

[0018] Figure 3 It is a structure schematic view of the first lock nut;

[0019] Figure 4 It is a structure schematic view of the biasing adjusting base;

[0020] Figure 5 It is an A-A sectional view of Figure 4 ;

[0021] Figure 6 It is a B-B sectional view of Figure 4 ;

[0022] Figure 7 It is a longitudinal sectional view of the biasing adjusting base. DETAILED DESCRIPTION

[0023] The structure and use principle of the multifunctional energy-saving wellhead sealing device will be further described in detail in combination with the drawings and specific embodiments.

[0024] For example, Figure 1 and Figure 2As shown in the structure diagram of the utility model multifunctional energy saving well mouth sealing device, the utility model multifunctional energy saving well mouth sealing device includes bottom sealing mechanism 1 and the biasing seat 2 who is located above this bottom sealing mechanism 1, bottom sealing mechanism 1 includes the connecting clamp 3 who is located below, the receiving pipe 4 who is located above and the sealing cavity 5 between connecting clamp 3 and receiving pipe 4, the blowout preventer rubber core 8 connected with the adjusting wheel 6 through the lead screw 7 is provided in the sealing cavity 5, the bottom bowl 9 is provided in the biasing seat 2, the biasing seat 2 is located above the bottom bowl 9, the connecting sleeve 10 is provided above the biasing seat 2, the second bowl 11 is provided inside the connecting sleeve 10, the second spiral sealing piece 12 is provided above the second bowl 11, the pressure ring 13 is provided above the second spiral sealing piece 12, the first bowl 14 is provided above the pressure ring 13, the first spiral sealing piece 15 is provided above the first bowl 14, the sealing end cover 17 is provided above the first spiral sealing piece 15 and is screwed with the connecting sleeve 10, the first lock nut 18 is provided on the connecting sleeve 10 below the sealing end cover 17, the second lock nut 19 is provided on the biasing seat 2 outside below the connecting sleeve 10, the first pressure spring 20 is provided between the pressure ring 13 and the first bowl 14, the first grease hole 21 is provided on the connecting sleeve 10 corresponding with the first pressure spring 20, so that the diameter of the polished rod is slightly smaller than the inner diameter of the first spiral sealing piece 15 and the second spiral sealing piece 12, the polished rod is sealed by grease between the first spiral sealing piece 15 and the second spiral sealing piece 12, the friction between the polished rod and the first spiral sealing piece 15 and the second spiral sealing piece 12 is reduced, the service life of the first spiral sealing piece 15 and the second spiral sealing piece 12 is prolonged, the energy consumption is reduced, the energy saving effect is obvious, and the sealing performance is also greatly improved, avoiding the leakage of crude oil between the first spiral sealing piece 15 and the second spiral sealing piece 12 of the polished rod, during the downward movement of the polished rod, the first pressure spring 20 below the first spiral sealing piece 12 is compressed downward under stress, the first spiral sealing piece 15 is buffered downward, the first spiral sealing piece 15 and the first bowl 14 move downward with the compression of the first pressure spring 20, the grease is located in the first pressure spring 20, during the downward movement of the polished rod, the grease pressure at the first pressure spring increases, the squeezed grease is along the polished rod and the first spiral sealing piece, with the up and down movement of the polished rod, so that the grease is more uniform, the sealing performance of the polished rod and the first spiral sealing piece 15 is better, after a period of use, the grease is injected into the first pressure spring through the first grease hole;

[0025] As Figure 2 shown, the second pressure spring 16 is provided below the second bowl 11, the second grease hole 22 is provided on the biasing seat side wall corresponding with the second pressure spring 21; during the downward movement of the polished rod, the second pressure spring 16 below the second spiral sealing piece 12 is compressed downward under stress, the friction between the polished rod and the second spiral sealing piece 12 is reduced, and the sealing performance is enhanced.

[0026] As shown in Figure 1 and Figure 2 , a sealing rubber ring 23 is arranged on the lower side of the biasing adjusting seat 2 corresponding to the bottom supporting bowl 9, further improving the sealing performance and avoiding the leakage of crude oil from the bottom supporting bowl and the biasing adjusting seat.

[0027] As shown in Figure 3 , a plastic layer 24 is arranged on the threaded surface of the first lock nut 18 and the second lock nut 19 radially inside, further improving the sealing performance of the first lock nut 18 and the second lock nut 19.

[0028] As shown in Figure 4 , Figure 5 , Figure 6 and Figure 7 , the biasing adjusting seat 2 comprises a swing seat 25 above the bottom supporting bowl 9 and a swing rod 26 above the swing seat 25, the swing rod 26 and the swing seat 25 are provided with a light pole hole 27, the swing seat 25 is a drum-shaped body, the center axis of the light pole hole 27 of the swing seat 25 deviates from the center axis of the swing seat 25, the position of the light pole hole can be adjusted by rotating the swing seat 25, and the position of the light pole hole 27 can be adjusted by rotating the swing rod 26, so that the adjustment is more accurate and convenient.

[0029] The protection scope of the utility model is not limited to the above-mentioned embodiments, as long as the structure is the same or similar to the structure of the multifunctional energy-saving wellhead sealing device of the utility model, it falls within the protection scope of the utility model.

Claims

1. A multifunctional energy-saving wellhead sealing device, comprising a bottom sealing mechanism and a deflection seat located above the bottom sealing mechanism, the bottom sealing mechanism comprising a connecting clamp located below, a receiving pipe located above, and a sealing cavity located between the connecting clamp and the receiving pipe, a blowout prevention rubber core connected with an adjusting wheel through a lead screw being arranged in the sealing cavity, a bottom bowl being arranged in the deflection seat, the deflection seat being located above the bottom bowl, a connecting sleeve being arranged above the deflection seat, a second bowl being arranged inside the connecting sleeve, a second spiral sealing element being arranged above the second bowl, a press ring being arranged above the second spiral sealing element, a first bowl being arranged above the press ring, a first spiral sealing element being arranged above the first bowl, a sealing end cover being threadedly connected with the connecting sleeve and arranged above the first spiral sealing element, a first lock nut being arranged on the connecting sleeve below the sealing end cover, and a second lock nut being arranged outside the deflection seat below the connecting sleeve. A first pressure spring is arranged between the compression ring and the first supporting cup, and a first grease hole is arranged on a connecting sleeve corresponding to the first pressure spring.

2. The multi-functional energy saving wellhead seal apparatus of claim 1, wherein: A second pressure spring is arranged below the second supporting cup, and a second grease hole is arranged on a side wall of the bias adjusting seat corresponding to the second pressure spring.

3. The multi-functional energy saving well head sealing device as claimed in claim 1, wherein: A sealing rubber ring is arranged on a lower side of the bias adjusting seat corresponding to the bottom supporting cup.

4. The multi-functional energy saving wellhead seal apparatus as claimed in claim 1, wherein: A plastic layer is arranged on a threaded surface radially inside the first and second lock nuts.

5. The multi-functional energy saving wellhead seal apparatus as claimed in claim 1, wherein: The bias adjusting seat comprises a swing seat above the bottom supporting cup and a swing rod above the swing seat, a light rod hole is arranged in the swing rod and the swing seat, the swing seat is a drum-shaped body, and a central axis of the light rod hole of the swing seat deviates from a central axis of the swing seat.

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