CN201915884U - Center-adjustable Christmas tree wellhead device - Google Patents

Abstract

A Christmas tree wellhead device with an adjustable center is applied to oilfield Christmas wellheads. An adjustable oil pipe connector is arranged on a flange at the upper end of the wellhead lock cone seat type oil pipe head; the adjustable oil pipe connector consists of an annular steel plate and an oil pipe nipple, and the lower plane of the annular steel plate of the adjustable oil pipe connector is contacted with the upper plane of a flange of the wellhead lock cone type oil pipe head; a circular connecting flange is arranged on the plane of the circular steel plate of the adjustable oil pipe connector. The lower plane of the connecting flange is provided with an annular groove, and an upper sealing steel ring of the flange is arranged in the annular groove. The effect is as follows: the adjustable oil pipe connector can move in the tapered central hole of the wellhead brake cone type oil pipe head, and the center of the adjustable oil pipe connector is adjusted to be opposite to the sucker rod. The eccentric wear caused by the misalignment of the sucker rod and the oil pumping pipe is solved, the operation times of the oil well are reduced, the well opening rate is improved, and the production running cost is reduced.

Description

Christmas tree wellhead device with adjustable center

technical field

The utility model relates to the technical field of oil production in oil fields, in particular to an oil production wellhead device, which is a center-adjustable Christmas tree wellhead device.

Background technique

At present, the production and development of domestic onshore oilfields has entered the middle and later stages. Except for self-spray oil recovery in some blocks with sufficient formation capacity, most of them are mechanical oil recovery, and mechanical oil recovery is dominated by beam pumping units. In practice, due to the installation of the Christmas tree wellhead device and the structure of the wellbore, the sucker rod and the tubing are often not concentric (aligned), resulting in eccentric wear between the sucker rod and the tubing when it reciprocates up and down, affecting the normal operation. Oil recovery and production operation, reducing the well-opening time rate and increasing production and operation costs.

Utility model content

The purpose of the utility model is to provide an adjustable center wellhead device of the Christmas tree, which can adjust the center of the wellhead of the Christmas tree, avoid the eccentric wear of the rod and tube caused by the misalignment of the sucker rod and the oil pipe, and improve the oil recovery efficiency.

The technical scheme adopted by the utility model is: the adjustable center Christmas tree wellhead device, mainly composed of wellhead gate cone seat type tubing head, connecting flange, adjustable tubing connector, flange upper sealing steel ring and flange lower sealing steel Composed of rings, the upper end of the wellhead sluice seat type tubing head has a tapered central hole, the upper end of the wellhead sluice seat type tubing head has a flange, there is an annular groove on the upper plane of the flange, and there is a flange in the annular groove The lower sealing steel ring; it is characterized in that: there is an adjustable tubing connector on the upper flange of the wellhead gate cone seat type tubing head; the adjustable tubing connector is composed of a circular steel plate and a short section of the tubing, and the short section of the tubing is vertical It passes through the center hole of the circular steel plate and is welded in the central hole of the circular steel plate; the two ends of the short joint of the oil pipe are respectively provided with external threads of the oil pipe; the external threads of the oil pipe can be connected to the oil pipe. The lower plane of the circular steel plate of the adjustable tubing connector is in contact with the upper plane of the flange of the wellhead gate cone seat type tubing head; there is a circular connecting flange on the upper plane of the circular steel plate of the adjustable tubing connector. There is an annular groove on the lower plane of the connecting flange, and a sealing steel ring on the flange is arranged in the annular groove.

The outer diameter of the tubing pup joint is 0.5 to 0.8 times the maximum inner diameter of the conical center hole at the upper end of the wellhead sluice seat type tubing head. The oil pipe short energy saving moves in the conical center hole of the wellhead gate cone seat type tubing head, adjusts the centerline of the adjustable tubing connector and the centerline of the upper sucker rod to be in the same straight line, and then tightens the bolts suitable for connecting the flange , fix the adjustable tubing connector between the wellhead taper tubing head and the connecting flange.

Beneficial effects of the utility model: the utility model can adjust the center of the Christmas tree wellhead device, and the adjustable tubing connector can move in the conical center hole of the wellhead brake cone seat type tubing head, and the center of the adjustable tubing connector and the oil pumping can be adjusted. The poles are opposite. Solve the eccentric wear caused by the misalignment of the sucker rod and the sucker pipe, reduce the number of oil well operations, increase the well operation time, and reduce the production and operation costs.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the structure of the Christmas tree wellhead device with an adjustable center of the utility model.

Fig. 2 is a schematic structural diagram of the adjustable oil pipe connector.

In the figure, 1-wellhead gate cone seat type tubing head, 2-connecting flange, 3-center adjustable tubing connector, 4-flange upper sealing steel ring, 5-flange lower sealing steel ring.

Detailed ways

Embodiment 1: Taking a center-adjustable Christmas tree wellhead device as an example, the utility model is further described in detail.

See Figure 1. The utility model can adjust the center of the Christmas tree wellhead device, which is mainly composed of wellhead gate cone seat type tubing head 1, connecting flange 2, adjustable tubing connector 3, flange upper sealing steel ring 4 and flange lower sealing steel ring 5 Composition, the upper end of the wellhead gate cone seat type tubing head 1 has a conical central hole, and the maximum diameter of the upper opening of the conical central hole is 150mm. There is a flange on the upper end of the wellhead gate cone seat type tubing head 1, and an annular groove is arranged on the upper plane of the flange, and a flange lower sealing steel ring 5 is arranged in the annular groove.

There is an adjustable oil pipe connector 3 on the flange of the upper end flange of the cone seat type oil pipe head 1 of the wellhead gate. Refer to FIG. 2 . The adjustable oil pipe connector 3 is composed of an annular steel plate 31 and a short joint 32 of the oil pipe. The outer diameter of the tubing nipple 32 is 73 mm, and the length is 350 mm. The oil pipe nipple 32 vertically passes through the center hole of the annular steel plate 31 and is welded in the center hole of the annular steel plate 31; the two ends of the oil pipe nipple 32 respectively have API standard oil pipe external threads. Refer to Fig. 1. The lower plane of the annular steel plate 31 of the adjustable tubing connector 3 is in contact with the upper plane of the flange of the wellhead gate cone seat type tubing head 1; the upper plane of the annular steel plate 31 of the adjustable tubing connector 3 has An annular connection flange 2. There is an annular groove on the lower plane of the connecting flange 2, and a sealing steel ring 4 on the flange is arranged in the annular groove.

Claims (2)

1. An adjustable center Christmas tree wellhead device, mainly composed of a wellhead gate cone seat type tubing head (1), a connecting flange (2), an adjustable tubing connector (3), and a sealing steel ring on the flange (4 ) and the sealing steel ring (5) under the flange, the upper end of the wellhead gate cone seat type tubing head (1) has a tapered center hole, the upper end of the wellhead gate cone seat type tubing head (1) has a flange, and the flange There is an annular groove on the upper plane, and there is a flange lower sealing steel ring (5) in the annular groove; it is characterized in that there is an adjustable oil pipe connection on the upper flange of the wellhead gate cone seat type oil pipe head (1) (3); the adjustable oil pipe connector (3) is composed of an annular steel plate (31) and an oil pipe nipple (32), and the oil pipe nipple (32) passes through the center hole of the annular steel plate (31) vertically and is welded In the central hole of the annular steel plate (31); the two ends of the tubing nipple (32) have tubing external threads respectively; The flange of the seat type oil pipe head (1) is in contact with the plane; there is an annular connecting flange (2) on the upper plane of the annular steel plate (31) of the adjustable oil pipe connector (3); the connecting flange (2) ) has an annular groove on the lower plane, and a sealing steel ring (4) on the flange is arranged in the annular groove. 2. The Christmas tree wellhead device with adjustable center according to claim 1, characterized in that: the outer diameter of the tubing nipple (32) is the conical center hole at the upper end of the wellhead brake cone seat type tubing head (1) 0.5 to 0.8 times the maximum inner diameter. the

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