CN204877311U - Lift quick -witted self sealss box centralizer and use machine of lifting of this centralizer - Google Patents

Abstract

The utility model discloses a quick -witted self sealss box centralizer lifts, its characterized in that: lift quick -witted self sealss box centralizer including rightting a section of thick bamboo (1) and strengthening rightting ring (3), wherein right a section of thick bamboo (1) for the hollow cylinder of two lamella formulas, separately be two identical pieces of rightting from the barrel center, it is located and rights (1) outer lane to strengthen rightting ring (3). The utility model discloses it has further to relate to one kind the utility model discloses a machine of quick -witted self sealss box centralizer lifts. The utility model discloses an it has reduced slewing radius effectively to lift quick -witted self sealss box centralizer for oil pipe's bucking load grow means that oil pipe is difficult to the bending deformation, has increased borehole operation's factor of safety.

Description

Lifting machine self sealss box centralizer and use the lifting machine of this centralizer

Technical field

The utility model belongs to petroleum well workover field of operation, provides a kind of erection device be arranged on bottom Operating Pressure lifting machine, and in particular to a kind of lifting machine self sealss box centralizer, the utility model relates to the lifting machine comprising described centralizer further.

Background technology

As everyone knows, lifting machine is unit indispensable in Operating Pressure equipment, its purposes realizes in the vertical direction carrying or transferring underground tool string, is the sole mode playing lower tubular column in Operating Pressure, so lifting machine has vital effect in Operating Pressure workover treatment.

Bottom lifting machine, oil pipe is suppressed curved or suppresses disconnected event and happen occasionally, often cause very serious engineering accident, such as preventer may be destroyed by suppressing in curved oil pipe snubbing well, cause gas blowout accident, even if in oil pipe lower going-into-well, because the integrality of metal is destroyed, easily rupture at weakness, and have no sign, the production of Oil/gas Well is interrupted.For another example, underground tool string is fallen in well when losing slips support, due to breaking part shape and irregular, brings great difficulty often to later stage salvage, cycle of salvaging usually longer and somewhat expensive.So oil pipe is suppressed curved or is suppressed the disconnected construction speed not only affecting whole engineering, and often the thing followed is engineering accident and casualties, thus produces serious economic loss and production loss.

We find in practice, and in Operating Pressure, oil pipe is suppressed curved disconnected position more than 80 percent of suppressing and all occurred in working window to working between preventer.Cause card oil pipe suppress curved suppress disconnected reason be due in the powerful downforce of lifting machine and well to the contradiction of the frictional force at the excessive upper top power of oil pipe and work rubber core of lubricator place, after stressed section of oil pipe exceeds certain limit, oil pipe can be surrendered in the weakest place, and in Operating Pressure, the weakest place is that working window arrives between work preventer.In addition, from the viewpoint of engineering, maximum unbraced length determines the flexing mode of oil pipe, Critical Buckling Load.And Critical Buckling Load and the radius of gyration are inversely proportional to, that is: the radius of gyration is less, and Critical Buckling Load is more.Through great many of experiments, we find, lacking erection device is cause tubing deformation, causes the arch-criminal of security incident.If can effectively take a kind of engineering measure to eliminate this weak link, so this problem just can obtain adequate solution.

For described problem, the utility model provides a kind of lifting machine self sealss box centralizer, thus effectively reduces the radius of gyration, makes the buckling load of oil pipe become large, means that oil pipe is not easy flexural deformation, add the safety factor of underground work.

Without supporting or conduit in the lifting machine self sealss box of prior art, causing tubing string distortion thus, suppressing disconnected, oil pipe placed in the middle and damage slips and problem such as work ram block and glue core etc.Lifting machine self sealss box centralizer of the present utility model solves the problems referred to above well.

Centralizer of the present utility model is applied on Operating Pressure machine, reduce the radius of gyration of tubing string, underground tool string can be placed between two parties in slips, avoid box cupling to contact or encounter slips and work ram block and glue core, solve tubing string remove occur in process because of tubing string touch slips and work ram block and the slips that causes of glue core damage and work preventer damage and be out of shape because of the drilling pipe bending of the excessive generation of the radius of gyration, thus ensure that the safety of slip system in underground work, and add Critical Buckling Load by reducing the radius of gyration, prevent tubing deformation, farthest ensure that slips removes the safety in process at tubing string, thus reduce the engineering accident and casualties that therefore produce.

Utility model content

The utility model provides a kind of lifting machine self sealss box centralizer, it is a kind of erection device be arranged on bottom Operating Pressure lifting machine, can be placed between two parties in lifting machine by described centralizer underground tool string, play the effect supporting righting, avoid box cupling to contact or encounter slips and ram block and glue core, thus ensure that the safety in underground work, and add Critical Buckling Load by reducing the radius of gyration, prevent tubing deformation.

The utility model is accomplished by following technical solution:

A kind of lifting machine self sealss box centralizer, is characterized in that: described lifting machine self sealss box centralizer comprises righting cylinder and strengthens centering ring, and wherein said righting cylinder is the hollow cylinder of two flap-type, is split up into two identical wiper blocks from body centre; A wherein lobe upper and lower both sides boring of described wiper block, another lobe makes silk, is connected between two lobe wiper blocks by bolt; Silk is made on righting cylinder top, screws in and is installed on bottom lifting machine; Described reinforcement centering ring is positioned at righting cylinder outer ring, agrees with bottom lifting machine, prevents the internal strain bottom lifting machine of lifting machine self sealss box centralizer.

Do deflecting process inside the latus rectum of described righting cylinder, there is the interior chamfering being greater than 60 degree at the top of its cylinder and low side position.The concrete size Selection of righting cylinder depends on different tubing string and pressure.

Have interior hexagon groove above described lifting machine self sealss box centralizer, the effect of interior hexagon groove prevents bolt back-off and convenient installation.

Lifting machine self sealss box centralizer latus rectum (that is: its inner circular aperture internal diameter), slightly larger than tubing coupling external diameter, all does deflecting process inside latus rectum, plays and guides tubing string effect.

Described lifting machine self sealss box centralizer body is outside to be agreed with lifting machine bottom thread, and it can freely screw in bottom lifting machine in self sealss box, on to prescribed torque.Its top is sat load-bearing slips, so can not unexpectedly back-off is out or come off in operation process.

The edge of lifting machine self sealss box centralizer can do Passivation Treatment, prevents that appearance is too sharp keen produces unsafe factor to operating personnel.Phosphorating treatment is done on the surface of centralizer, prevents centralizer because of liquid corrosion corrosion.

For same lifting machine, lifting machine self sealss box centralizer outer shape is constant, and its latus rectum can change according to be suitable for tubing string difference.

The material of described slips centralizer can be converted steel material, because partially liq is corrosive, can select stainless steel, or phosphorating treatment is done on common iron surface, prevents rust.

The size of lifting machine self sealss box centralizer decides according to lifting machine latus rectum and string size, it designs with screw thread, screw thread is positioned at the top of lifting machine self sealss box centralizer, can in precession lifting machine flange in the bottom, thus ensure that lifting machine self sealss box centralizer can not drop after installing when prescribed torque, and be easy to dismounting.Do deflecting process in the upper and lower end face of tubing string process, allow tubing string remove more level and smooth, play the guiding role.

The utility model relates to a kind of lifting machine further, it is characterized in that: described lifting machine is with lifting machine self sealss box centralizer described in the utility model.

Accompanying drawing illustrates:

Fig. 1 is the overall structure schematic diagram of lifting machine self sealss box centralizer of the present utility model.

Fig. 2 is the generalized section of lifting machine self sealss box centralizer of the present utility model integral installation in lifting machine bottom state.

Fig. 3 is hexagon groove schematic diagram in lifting machine self sealss box centralizer top of the present utility model.

Description of reference numerals

1-lifting machine self sealss box righting cylinder; 2-bolt; 3-strengthens centering ring; 4-lifting machine flange in the bottom; Hexagon groove in 5-

Detailed description of the invention

Exemplary and without limitation the utility model is described by detailed description of the invention below in conjunction with accompanying drawing.

During running string, if centralizer do not installed by lifting machine self sealss box, in this operating process, tubing string will against certain side of working rig, cause the damage of tubing string G.I.H difficulty and slips and preventer, if well head pressure is too large, lifting machine pressure must be regulated to press down tubing string, if tubing string has occurred diastrophic situation at slips place, be more unfavorable for entering under tubing string.Lifting machine is installed centralizer of the present utility model, described centralizer righting cylinder 1 is outside to be agreed with lifting machine bottom inside, it freely to screw in bottom lifting machine in self sealss box, connected by bolt 2 between two lobes of described centralizer, then from outside by special upper shackle instrument, on prevent it from coming off to prescribed torque, strengthen centering ring 3 and fully ensure that righting cylinder is placed in the middle, and then tubing string bottom lifting machine in self sealss box place held up in middle position, drilling pipe bending distortion can not be produced, and add Critical Buckling Load by reducing the radius of gyration, prevent Strings Helical Buckled in Vertical, thus ensure that tubing string safety in underground work.And, by the deflecting process inside centralizer, in running string process, tubing string can successfully be transferred, thus avoids slips and damaged by tubing string, avoid work ram block and glue core is hung wound, thus ensure that the safety of slip system safety and work preventer.

Claims (8)

1. a lifting machine self sealss box centralizer, it is characterized in that: described lifting machine self sealss box centralizer comprises righting cylinder (1) and strengthens centering ring (3), wherein said righting cylinder (1) is the hollow cylinder of two flap-type, is split up into two identical wiper blocks from body centre; Described reinforcement centering ring (3) is positioned at righting cylinder (1) outer ring.

2. lifting machine self sealss box centralizer according to claim 1, is characterized in that: have interior hexagon groove above described lifting machine self sealss box centralizer.

3. lifting machine self sealss box centralizer according to claim 1, is characterized in that: a wherein lobe upper and lower both sides boring of described wiper block, another lobe makes silk, connects between two lobes with bolt (2).

4. lifting machine self sealss box centralizer according to claim 1, is characterized in that: deflecting inside the latus rectum of described righting cylinder (1).

5. lifting machine self sealss box centralizer according to claim 1, is characterized in that: there is the interior chamfering being greater than 60 degree at described righting cylinder (1) top and low side position.

6. lifting machine self sealss box centralizer according to claim 1, is characterized in that: the latus rectum of described lifting machine self sealss box centralizer (1) is slightly larger than string collar external diameter.

7. lifting machine self sealss box centralizer according to claim 1, is characterized in that: the top of described lifting machine self sealss box centralizer is designed with screw thread.

8. a lifting machine, is characterized in that: described lifting machine comprises the lifting machine self sealss box centralizer according to aforementioned any one of claim.