CN201843584U - Tubing draining device - Google Patents

Abstract

The utility model relates to a tubing draining device which consists of a friction mechanism, an inner tube and a seal sleeve; the friction mechanism and the seal sleeve are sleeved outside the inner tube; the friction mechanism is arranged on the seal sleeve; the lower part of the inner tube is provided with an oil draining hole; screw threads are arranged on the oil draining hole; internal screw threads at the upper part of the seal sleeve are connected with the screw threads on the oil draining hole; and the oil draining hole at the lower part of the inner tube is covered by the lower part of the seal sleeve. The tubing draining device is connected with an oil-well pump; when the oil draining is needed during the next operation of lifting the tubing, the tubing is lifted upward first, so that a raised key and a raised key are buckled together; the inner tube is rotated; the friction mechanism and the seal sleeve stay still under the action of the friction force between the friction mechanism and a casing; the connecting screw threads of the inner tube and the seal sleeve are screwed off under the action of the rotating torque; and the seal sleeve moves upward, so as not to cover the oil draining hole and to lead the oil draining hole on the inner tube to be communicated inside and outside to drain the oil. When the tubing draining device drains the oil, the tubing is rotated to drain the oil after being lifted upward; the oil draining can be voluntarily controlled artificially; and the tubing draining device has convenient oil draining, reliable working, high operation success rate and simple structure and is convenient to process and use.

Description

Tubing drain

Technical field

The utility model is the downhole tool of oil field oil recovery usefulness, is a kind of tubing drain.

Background technology

Existing bleeder kind is a lot, as Chinese patent application 96238554.9 " a kind of split type oil riser bleeder ", its brace type is separated lock assembly and will be contacted and draining with the draining assembly when carrying oil pipe last, will cause bleeder to open draining when running in the operation workman operate miss or the process of going into the well when new situation needs to carry oil pipe, make operation unsuccessful.Also there is the problem of above-mentioned patent in Chinese patent application 00247456.5 " oil riser bleeder " and for example.The operating worker operate miss is the custom that is difficult to change that itself needs the operation of carrying oil pipe and form for many years because of in the following oil pipe process, all might cause the draining of opening of this type of bleeder.Chinese patent application 00258996.6 " slip-type rotation bleeder ", slips can not radially open, and can not be stuck on the sleeve pipe, so draining not is that slips can radially open and is stuck on the sleeve pipe, slips can not be regained sometimes and blocks tubing string behind the draining, causes the accident.Chinese patent application 2007200290118 " a kind of tubing drain " and for example, it simple in structure, but its sealing shroud (5) and interior pipe (3) are for being threaded, because there are problems such as fouling, corrosion in the well that has, the connecting thread that causes sealing shroud (5) and interior pipe (3) easily can't get loose and can not draining.Chinese patent application 200510043764.x " oil riser bleeder " and for example, the tubing string elongation is shortened and is caused bleeder action draining during for fear of oil pumping, can not arrive lock ball (5) when making its release cover (4) inner reaming be in tubing string elongation shortening locates, need design interior pipe (1), release cover (4) very long, and to go up the elongation that causes when oil well pump work is satisfied in processing at interior pipe (1) and shorten the rail groove that requires, interior pipe (1) must be selected thick tubing for use again, therefore, cost of materials and processing charges are all higher.

Summary of the invention

The purpose of this utility model is to avoid the deficiency of existing bleeder, and a kind of tubing drain is provided, and carries the draining of opening of oil pipe realization bleeder when carrying oil pipe on the rotation back.

The purpose of this utility model is achieved in that by friction mechanism, interior pipe, sealing shroud to be formed, pipe was outside in friction mechanism, sealing shroud were sleeved on, friction mechanism is on sealing shroud, the draining hole is arranged at interior pipe bottom, the draining hole of pipe bottom in the sealing shroud bottom covers, there is protruding key the friction mechanism lower end, there is protruding key the sealing shroud upper end, pin nose is installed on inner pipe, perpendicular rail groove, horizontal rail groove are set on the sealing shroud, perpendicular rail groove, horizontal rail groove communicate, and the pin rear end is in the horizontal rail groove on the sealing shroud, and pin can arrive in the perpendicular rail groove on the sealing shroud.

The beneficial effects of the utility model are: during the utility model draining by on carry behind the oil pipe rotation pipeline and carry the oil pipe draining on again, do not need to unscrew screw thread, draining is convenient, reliable operation, job success ratio height, the utility model do not need to process on inner pipe rail groove, simple in structure, cost of materials and processing charges are low, are convenient to processing, help promoting the use of.

Description of drawings

Fig. 1 is the assembling drawing of the utility model embodiment.

Fig. 2 is the raceway surface expanded view of part 5 among Fig. 1.

The specific embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described.

Embodiment of the present utility model is by friction mechanism 1, interior pipe 3, sealing shroud 5, pin 6 is formed, friction mechanism 1, pipe 3 outsides in sealing shroud 5 is sleeved on, friction mechanism 1 is on sealing shroud 5, draining hole 7 is arranged at interior pipe 3 bottoms, the draining hole 7 of pipe 3 bottoms in sealing shroud 5 bottoms cover, there is protruding key 2 friction mechanism 1 lower end, there is protruding key 4 sealing shroud 5 upper ends, manage on 3 in pin 6 front ends are installed in, perpendicular rail groove 8 is set on the sealing shroud 5, horizontal rail groove 9, perpendicular rail groove 8, horizontal rail groove 9 communicates, and pin 6 rear ends are in 9 li of horizontal rail grooves on the sealing shroud 5, and pin 6 can arrive 8 li of perpendicular rail grooves on the sealing shroud 5.Protruding key 2, protruding key 4 are buckled together can transfer torque, does not rotate so that make friction mechanism 1 fix sealing shroud 5.Protruding key 2 can process from friction mechanism 1, parts also can be installed in addition form protruding key 2, and protruding key 4 can process on sealing shroud 5 lower surfaces, parts also can be installed in addition form protruding key 4.Friction mechanism 1 lower end and sealing shroud 5 can link into an integrated entity, but this structure friction mechanism 1 easy wear sleeve, because the tubing string wriggling that produces in the oil well pump course of work can cause friction mechanism 1 together to move with tubing string, and friction mechanism 1 tightly is attached on the sleeve pipe, so easy wear sleeve, therefore, grand between friction mechanism 1 lower end and sealing shroud 5 upper ends have a segment distance, be together not move with tubing string for the tubing string that produces in oil well pump course of work wriggling can not cause friction mechanism 1, the distance of friction mechanism 1 lower end and sealing shroud 5 upper ends must be greater than the tubing string wriggling amount that produces in the oil well pump course of work, and friction mechanism 1 does not together move with tubing string in the time of could guaranteeing oil well pump work.Last supporting positive cover is arranged at interior pipe 3 tops, on interior pipe 3 lower thread following supporting positive cover is arranged, and last supporting positive cover, following supporting positive cover external diameter are ￠ 108-￠ 154mm.

Brake pad external diameter on the friction mechanism 1 is greater than casing inner diameter, can change with casing inner diameter, under spring action, brake pad is close to internal surface of sleeve pipe, and produce friction between the sleeve pipe, when the needs draining, on carry oil pipe, the protruding key 2 of friction mechanism 1 lower end and the protruding key 4 of sealing shroud 5 upper ends are buckled together, again the rotation in the pipe 3, sealing shroud 5 is integral with friction mechanism 1 and does not rotate, pin 6 moves to the lower end of the perpendicular rail groove 8 on the sealing shroud 59 li of the horizontal rail grooves on the sealing shroud 5, carries oil pipe on again, and interior pipe 3 is up, the perpendicular rail groove 8 of pin 6 on sealing shroud 5 is up, sealing shroud 5 does not move under the effect of friction mechanism 1, and sealing shroud 5 produces relative motion with interior pipe 3, and sealing shroud 5 is the draining hole 7 of pipe 3 bottoms in covering not, draining hole 7 arrives perpendicular rail groove 8 places of sealing shrouds 5, the oil of removing heat by catharsis of draining hole 7 internal and external antithetical couplets in making on the pipe 3.Interior pipe 7 places, draining hole, 3 bottom require wall thickness thicker, are economical with materials, can be designed to two bodies.

Claims (1)

1. tubing drain, by friction mechanism (1), interior pipe (3), sealing shroud (5) is formed, friction mechanism (1), sealing shroud (5) is sleeved on interior pipe (3) outside, friction mechanism (1) is on sealing shroud (5), draining hole (7) is arranged at interior pipe (3) bottom, the draining hole (7) of pipe (3) bottom in sealing shroud (5) bottom covers, there is protruding key (2) friction mechanism (1) lower end, there is protruding key (4) sealing shroud (5) upper end, it is characterized in that: pin (6) front end is installed on the interior pipe (3), perpendicular rail groove (8) is set on the sealing shroud (5), horizontal rail groove (9), perpendicular rail groove (8), horizontal rail groove (9) communicates, pin (6) rear end is in horizontal rail groove (9) lining on the sealing shroud (5), and pin (6) can arrive perpendicular rail groove (8) lining on the sealing shroud (5).

Images