CN201391266Y - Automatic regulation device for sliding-disc eccentric wellhead - Google Patents

Abstract

An automatic regulation device for a sliding-disc eccentric wellhead relates to a wellhead matching device for oil recovery operation, and is characterized in that an upper groove, a fixed hole and an upper round hole are formed on a pressure plate; a lower groove, a fixed hole, a lower round hole and a steel ring seal groove are formed on a base plate; and a pipe connection is arranged on a sliding disc, and is connected with an upper short connection and a lower short connection. The device has the benefits that the sliding disc can freely slide between the base plate and the pressure plate to avoid the eccentric wear of a wellhead device and protect a wellhead sealing device from be damaged. In oil recovery production, the eccentric wear of a polish rod and a packing box is avoided, thereby reducing packing replacement workload, improving wellhead working efficiency, reducing work capacity of workers, and reducing materials consumption. The device can automatically regulate the position of the wellhead within a large range, thereby solving the eccentric problem of the wellhead in pumping and sucking operation, and also solving the eccentric problems of the polish rod and the packing box during recovering oil from an oilwell.

Description

Sliding plate formula decentralized wellhead self-checking device

Technical field

The utility model relates to a kind of oil producing operation well head corollary apparatus, is applicable in the oil producing operation technology.

Background technology

When oil well adopts reciprocating beam-pumping unit to recover the oil; because the deviation of polished rod center and packing box center; cause the eccentric wear of polished rod to packing; accelerated the rate of wear of packing; shortened the application life of packing; need to shut down continually to change packing, directly influenced the efficient of oil producing operation, also increased the cost of use of working strength of workers and material.When oil well carries out the pumping discharge opeing, the shelf of working rig need be stood on the well head, derrick center and well head center are aligned, derrick is held shelf with wire rope, adjusts wire rope it is fixed, and just can carry out operation.But the shelf of working rig has the height of 18-24 rice, and derrick center and well head center always have some skews, and during the pumping discharge opeing, regular meeting makes the seal generation eccentric wear of well head, damages its sealing.Owing to be operation in the open air, the shelf of working rig will wave when blowing in addition, also can vacillate in the derrick center, if can not in time adjust the centering problem of it and well head, will accelerate the well head sealing part abrasion.For addressing this problem, used a kind of double eccentric wheel adjusting device at the scene, because its complex structure, weight is big, and the cost height need be by manually regulating, and the operation of conciliation is numerous and diverse, and the amplitude of adjusting deviation is less, is difficult to adapt to on-the-spot needs.

The utility model content

The purpose of this utility model provides a kind of sliding plate formula decentralized wellhead self-checking device, utilizes it can regulate the center of well mouth of oil well automatically, reduces the wearing and tearing to the well head seal, prolongs its application life.

Technical solution of the present utility model is to realize like this, a kind of sliding plate formula decentralized wellhead self-checking device, be in the same place by bolted on connection with platen in the chassis, sliding plate is installed between chassis and the platen, its special character is, on platen, have circular upper groove and fixing hole, and the heart has last circular hole therein; Have circular low groove and fixing hole on the chassis, the heart has following circular hole therein, and has the steel ring seal groove on its bottom surface; Upper and lower at the middle part of sliding plate have union respectively, and union has internal thread, is linked with short circuit and following short circuit respectively by internal thread, has annular groove respectively in the above and below of sliding plate, and sealing ring and lower seal are housed in groove.

Usefulness of the present utility model is; because the center-hole diameter on platen and chassis is than the big 50-60 millimeter of diameter of the union part of sliding plate; the circular groove diameter of chassis and platen is greater than sliding plate external diameter 50-60 millimeter; the space that sliding plate can be free to slide between chassis and platen is bigger; last short circuit and following short circuit are installed on the joint screw thread of sliding plate; when carrying out the oil well operation; if there is skew at working rig derrick center and well head center; make sliding plate displacement within the specific limits thus; can avoid wellhead assembly generation eccentric wear, the sealing of protection well head is injury-free.When recovering the oil production, if polished rod and packing box misalignment, packing box drives sliding plate by little four-way of well head and short circuit can do certain displacement, make the polished rod center remain consistent with the packing box center, can avoid polished rod and packing box eccentric wear, thereby can reduce the workload of changing packing, improve the operating efficiency of oil well, reduce workman's workload, reduce material consumption.The scope of utilizing the automatic adjusting of this device pithead position to depart from is bigger; the skew problem of working rig and well head in the time of both can solving pumping; the skew problem at polished rod and well head packing box center in the time of also can solving oil recovery; both protected the swabbing well mouth sealing device; can protect polished rod stuffing box again; prolong their application life, saved material consumption, reduced cost of production.

Description of drawings

Accompanying drawing is the structural representation that partly cuts open of the present utility model.

The specific embodiment

Difference processing and fabricating chassis 6, platen 8, sliding plate 11 etc., making chassis 6, platen 8 and the contacted surface portion of encapsulant is hard smooth flat, the upper and lower Circularhole diameter at platen 8 and 6 centers, chassis is greater than about 60 millimeters of tubing string diameter, the upper and lower groove diameter of the circle of chassis 6 and platen 8 is greater than about 60 millimeters of sliding plate external diameter, on chassis 6 and platen 8, be evenly equipped with 12 fixing holes 7, they are corresponding with the bolt hole of well head big four upper flange, 6 bottom surface is processed with steel ring seal groove 3 on the chassis, also has 2 fastener holes in addition.Upper and lower at the center of sliding plate 11 have upper and lower union respectively, by screw thread short circuit 13, short circuit 1 down is installed, and the upper end of last short circuit 13 is oil pipe internal threads, and its lower end is an oil tube external thread, and the two ends of lower contact 1 have oil tube external thread respectively.All dose sealing ring 10 and lower seal 4 on the oil resistant rubber in the annular groove with the upper and lower surface of sliding plate 11, sliding plate 11 is installed between chassis 6 and the platen 8, by 2 fastening bolts 14 chassis 6 and platen 8 are bound up, the tail cap of bolt is trapped in the groove below the chassis, and sliding plate 11 can slide between them.To descend short circuit 1 to be installed on the union of sliding plate 11 belows by screw thread, last short circuit 13 will be installed on the union of sliding plate 11 tops.

This device is installed on the flange of well head big four by fixing hole 7, the steel sealing ring is installed between them.When pumping production, well head packing box, little four-way are bound up by last short circuit and this device, if pumping unit horsehead and well head have deviation, sliding plate 11 can be regulated automatically, avoids polished rod and packing box generation eccentric wear.When working rig carries out the oil well swabbing operation, can adjust deviation between well head and the working rig center automatically by this device, make their centerings of trying one's best, reduce eccentric wear to well mouth sealing device, the protection wellhead assembly prolongs its application life.

Claims (1)

1. A kind of sliding plate formula decentralized wellhead self-checking device, chassis (6) and platen (8) are bound up by bolt (14), sliding plate (11) is installed between chassis (6) and the platen (8), it is characterized in that: on platen (8), have circular upper groove (9) and fixing hole, and the heart has last circular hole (12) therein; Have circular low groove (5) and fixing hole (7) on chassis (6), the heart has following circular hole (5) therein, and has steel ring seal groove (3) on its bottom surface; Upper and lower at the middle part of sliding plate (11) have union respectively, union has internal thread, be linked with short circuit (13) and following short circuit (1) respectively by internal thread, have annular groove respectively, sealing ring (10) and lower seal (4) are housed in groove in the above and below of sliding plate (11).

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