CN208870538U - A kind of high temperature resistant screw pump application tube compensator - Google Patents

Abstract

The utility model discloses a kind of high temperature resistant screw pump application tube compensators, including outer tube and torque tube, torque tube to be slidably disposed in outer tube, and terminal end stretches out housing pipe end；Housing pipe end is equipped with the torque fitting for preventing torque tube from slipping away outer tube.The utility model has and can be compensated to tubing string by thermal expansion variation length, the feature for keeping the position of torque anchor stable, when the temperature is changed, under oil pipe extension or shortening effect, torque tube 2 can be moved along outer tube 1, guaranteed that the position for being connected to the torque anchor of 2 lower end of torque tube is stablized, realized the function with automatic temperature change compensation tubing length, reach no matter oil pipe extends and shortens, oil pipe torque anchor does not fail.

Description

A kind of high temperature resistant screw pump application tube compensator

Technical field

The utility model relates to the Technology of Heavy Oil Recovery field, in particular to a kind of high temperature resistant screw pump application tube compensation Device.

Background technique

In existing thickened oil steam-stimulated oil well applying working condition, in steam injection operation process, tubing string is due to by warm Power expansion effects, cause tubing length to change, and tubing string can generate play up and down, the torque anchor for causing torque tube to connect It is same to generate play, cause the position change of torque anchor, easily leads to torque anchor and loosen, fail, then cause double The problem of torque that metal screw pump generates acts on lower oil pipe thread slip phenomenon, causes down-hole accident.

Utility model content

The technical problems to be solved in the utility model: purpose of the utility model is to solve it is in the prior art not Foot, tubing string can be compensated by thermal expansion variation length by providing one kind, keep the position of torque anchor stable A kind of high temperature resistant screw pump application tube compensator.

The technical solution of the utility model includes: a kind of high temperature resistant screw pump application tube compensator described in the utility model, Including outer tube and torque tube, the torque tube is slidably disposed in outer tube, and the terminal end stretches out outer tube End；

Further, the housing pipe end is equipped with the torque fitting for preventing the torque tube from slipping away outer tube.

Further, torque tube tube body cross section is in polygon, the torque fitting inner wall and the torque tube phase Mutually matching.

Further, central tube is additionally provided in the outer tube, described central tube one end is fixed on outer tube head end, described Central tube is inserted into torque tube.

Further, seal assembly is additionally provided between the central tube and torque tube；The seal assembly includes that sliding is close Seal group and static sealing ring group；On the centrally disposed pipe of sliding ring group, the static sealing ring group is arranged in torque tube On.

Further, the outer tube and torque fitting are threadedly coupled；The housing tube wall opposing torque joint is also Holding screw equipped with even twisting moment connector.

Further, torque tube tube body cross section is in octagonal.

The utility model compared with prior art the utility model has the advantages that when the temperature is changed, oil pipe extend or shortening effect under, Torque tube can be moved along outer tube, guaranteed that the position for being connected to the torque anchor of torque tube lower end is stablized, realized with temperature The function of the automatic compensation tubing length of variation reaches no matter oil pipe extends and shortens, and oil pipe torque anchor does not fail；Torque tube It is respectively equipped with polygon ring set with torque fitting, torque tube is made not can be carried out radial rotating, can only be moved up and down, realizes screw rod Pump, the transmitting of oil pipe torque and oil liquid sealing, tubing round thread are not influenced by reaction torque, and tubing round thread does not slip, and reduces underground Work accident reduces workover treatment number, reduces labor intensity, reduces unnecessary operating cost.Central tube plays torque tube and leads To effect, it is further ensured that torque tube telescopic process is steady；Seal assembly includes sliding ring group and static sealing ring group, is guaranteed Sealing effect is good.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the sectional view of torque tube B-B in Fig. 1；

Fig. 3 is the overall structure diagram of the utility model seal assembly.

Specific embodiment

In order to deepen the understanding of the utility model, below we will the utility model is described in further detail in conjunction with attached drawing, The embodiment is only used for explaining the utility model, does not constitute the restriction to scope of protection of the utility model.

If Fig. 1-Fig. 3 shows a kind of embodiment of high temperature resistant screw pump application tube compensator of the utility model, packet Outer tube 1 and torque tube 2 are included, 1 front end of outer tube is equipped with connector, and outer tube 1 is connected on oil pipe by connector, and oil pipe front end connects Double metal spiral bar pump is connect, torque anchor is connected with after torque tube 2, central tube 3,3 one end of central tube is additionally provided in outer tube 1 It is fixed on 1 head end of outer tube, central tube 3 is inserted into torque tube 2, serves to torque tube 2 and lead further to；Torque tube 2 can be slided Dynamic setting is in outer tube 1, specific move mode are as follows: 2 outer wall of torque tube is along outer tube 1,2 inner wall of torque tube along central tube The opposite sliding simultaneously of 3 outer walls；1 end of outer tube is equipped with the torque fitting 21 for preventing torque tube 2 from slipping away outer tube 1；Torque tube 2 is managed Body cross section is in octagonal；21 inner wall of torque fitting is mutually matched with torque tube 2；It is additionally provided between central tube 3 and torque tube 2 close Sealing assembly 4；Seal assembly 4 includes sliding ring group 41 and static sealing ring group 42；The centrally disposed pipe 3 of sliding ring group 41 On, static sealing ring group 42 is arranged on torque tube 2；Outer tube 1 and torque fitting 21 are threadedly coupled；1 tube wall of outer tube is opposite to be turned round The holding screw of even twisting moment connector 21 is additionally provided at square connector 21.

The utility model has and can be compensated to tubing string by thermal expansion variation length, keeps torque anchor The stable feature in position, when the temperature is changed, under oil pipe extension or shortening effect, torque tube 2 can be moved along outer tube 1, be guaranteed The position for being connected to the torque anchor of 2 lower end of torque tube is stablized, and realizes the function with automatic temperature change compensation tubing length Can, reach no matter oil pipe extends and shortens, oil pipe torque anchor does not fail；Torque tube 2 and torque fitting 21 are respectively equipped with more Side shape ring set, makes torque tube 2 not can be carried out radial rotating, can only move up and down, and realizes screw pump, the transmitting of oil pipe torque and oil Liquid sealing, tubing round thread are not influenced by reaction torque, and tubing round thread does not slip, and reduce underground work accident, reduce workover treatment Number reduces labor intensity, reduces unnecessary operating cost.Central tube 3 play the guiding role to torque tube 2, is further ensured that torsion 2 telescopic process of quarter bend is steady；Seal assembly 4 includes sliding ring group 41 and static sealing ring group 42, guarantees that sealing effect is good.

Above-mentioned specific embodiment only illustrates the technical concept and structure feature of the utility model, it is therefore intended that allow ripe The stakeholder for knowing technique can implement accordingly, but the above content is not intended to limit the protection scope of the utility model, all Any equivalent change or modification made by Spirit Essence according to the utility model, should all fall into the protection scope of the utility model Within.

Claims (5)

1. a kind of high temperature resistant screw pump application tube compensator, it is characterised in that: described including outer tube (1) and torque tube (2) Torque tube (2) is slidably disposed in outer tube (1), and outer tube (1) end is stretched out in torque tube (2) end；It is described outer Casing (1) end is equipped with the torque fitting (21) for preventing the torque tube (2) from slipping away outer tube (1)；Torque tube (2) tube body Cross section is in polygon, and torque fitting (21) inner wall is mutually matched with the torque tube (2).

2. a kind of high temperature resistant screw pump application tube compensator according to claim 1, it is characterised in that: the outer tube (1) it is additionally provided with central tube (3) in, described central tube (3) one end is fixed on outer tube (1) head end, and central tube (3) insertion is turned round In quarter bend (2).

3. a kind of high temperature resistant screw pump application tube compensator according to claim 2, it is characterised in that: the central tube (3) it is additionally provided between torque tube (2) seal assembly (4)；The seal assembly (4) includes sliding ring group (41) He Jingmi Seal group (42)；On the centrally disposed pipe of the sliding ring group (41) (3), the static sealing ring group (42) is arranged in torque It manages on (2).

4. a kind of high temperature resistant screw pump application tube compensator according to claim 1, it is characterised in that: the outer tube (1) it is threadedly coupled with torque fitting (21)；Even twisting moment is additionally provided at outer tube (1) the tube wall opposing torque connector (21) to connect The holding screw of head (21).

5. a kind of high temperature resistant screw pump application tube compensator according to any one of claims 1-4, it is characterised in that: institute Torque tube (2) tube body cross section is stated in octagonal.