CN201310317Y - Half-way well cementing tool without drilling plug - Google Patents

Abstract

The utility model relates to a half-way well cementing tool without a drilling plug used for cementing and completion operations in oil-gas field, which solves the problem that the accessories such as a drilling rubber plug, a blind plate connector and the like are still required after half-way cementing operations. Hemicycle rings are arranged at one ends of an upper elastic inner sleeve (7) and a lower elastic inner sleeve (14), and the other ends thereof are combined by a plurality of finger-like elastic sheets, which takes the shape of a complete inclined surface hemicycle ring in the elastic retraction state; the top parts of the finger-like elastic sheets adopt inclined conical surfaces and matched with the ring-shaped inclined conical surfaces of the inner walls of a closed hole sleeve (6) and a pup joint body (11); besides, a rubber sleeve (20) forming a sealing structure with the upper elastic inner sleeve (7) and the lower elastic inner sleeve (14), a tapered rubber sleeve (26) and a rib structure for pressurizing are arranged on an inner-inserted tube pillar, so that the whole process of half-way well cementing without the drilling plug can be realized through downward pressing the inner-inserted tube pillar.

Description

A kind of brill plug half way cementing tool of exempting from

Technical field

The utility model relates to solid, the completion practice instrument of oil gas field, particularly a kind ofly exempts to bore plug half way cementing tool.

Background technology

Along with the completion technique of protection oil reservoir is constantly progressive, adopt not cementing of screen casing under the oil reservoir well section, and the oil gas well that only well section half way is cemented the well on oil reservoir is increasing.Oil field half way well shaft fixing technology commonly used all is the way that connects the shutoff of blind plate joint on screen casing at present, sprains pressure, filling external casing packer and opens the hydraulic pressure stage cementing device so that form.The greatest problem that this method exists be essential after well cementation with macaroni add the perforate plug stayed when little bit drills is fallen to cement the well in the well, close stopple, blind plate joint etc. manage in annex.And the experience of oil field practical operation shows, belongs to slim-hole, the operation of jig drill tool owing to bore well cementation annexes such as plug and blind plate, and plug may rotate with drill bit in addition, thereby this operation time and effort consuming is comparatively difficult.In addition little drilling tool transport and recovery etc. all needs the extra completion time, cause oil reservoir to soak the operation early that the pollution time increases and incur loss through delay oil well.

Summary of the invention

For overcoming the defective in the background technology, the utility model provides a kind of plug half way cementing tool of exempting to bore, and solves the problem that still need bore annexes such as plug and blind plate joint after the half way well cementing operation.

A kind of brill plug half way cementing tool of exempting from comprises drilling-free sizing collar, packoff nipple, interpolation tubing string three parts.Drilling-free sizing collar mainly by top connection, body, retaining steel ball, close the borehole jack shear pin, go up overlap shear pin in the elasticity, close borehole jack, go up cover in the elasticity, perforate cover shear pin, perforate cover, lower contact constitute.Mainly cover, bottom joint constitute packoff nipple in shear pin, the following elasticity by overlapping in pipe nipple body, seal rubber sleeve, the following elasticity.The interpolation tubing string mainly by plug, oil connection, upper boom, set upright joint, rubber sleeve, hole pipe, obturating plug shear pin, plug seat, transfer stock, sealed tube, taper plug, gum cover pipe, target seeker to constitute.

Drilling-free sizing collar top connection, lower contact link to each other with the body upper/lower terminal respectively, and the bottom surface of top connection and the end face of lower contact are deep into chamber body and form two ring-like interior step surfaces up and down.Close borehole jack, perforate cover, go up in the elasticity cover and all the other components place two ring-like between the step surfaces.Close borehole jack and body for being slidingly matched, pass borehole jack shear pin will close borehole jack and be fixed on the body.Close the borehole jack outer wall and have a cone tank, the retaining steel ball places in the cone tank, and this cone tank and inner body wall form an airtight space.Closing the borehole jack inwall has an annular scalene cone, and on this scalene cone, the cover shear pin will be gone up to overlap in the elasticity to be fixed on and close in the borehole jack in the last elasticity, and cover forms with the pass borehole jack and is slidingly matched in the last elasticity.Cover one end is a semicircular ring in the last elasticity, and the other end is combined by several finger-like flexure strips, and its elastic shrinkage state is complete inclined-plane semicircular ring.The top of finger-like flexure strip is a scalene cone, forms with wall circular scalene cone in the borehole jack of pass to cooperate.Close borehole jack bottom wall thickness less than its top wall thickness, close the annular space that wall circular scalene cone in the borehole jack, borehole jack bottom, pass and perforate cover end face form a depression, this annular space length is more than or equal to overlapping length in the last elasticity.Perforate cover end face inside is the conical surface, and the outside is an anchor ring.Perforate cover shear pin is fixed on the perforate cover on the body.Have several axially cementing holes of symmetry on the body wall under the perforate cover shear pin, a cementing hole part is covered by the perforate cover, and another part is communicated with the annular space that forms between the perforate outer step surface of cover and body, the lower contact end face; The through hole that has some axial symmetries on the body wall under the cementing hole in addition is communicated with this annular space.Perforate cover bottom and lower contact inwall be for being slidingly matched, and sealed by encapsulant between the two.

The pipe nipple inner body wall of packoff nipple has the tiltedly interior step surface of an annular, and tiltedly interior step surface of this annular and bottom joint end face form the annular space of a depression, and this annular space length is more than or equal to overlapping length in the elasticity down.Seal rubber sleeve and taper gum cover match with cover inside in the following elasticity and form sealing.

Interpolation tubing string foot is a target seeker.On the target seeker, embedded the taper gum cover on the outer wall between gum cover pipe and the sealed tube.On the pipe outer wall of hole two annular table terraces are up and down arranged, have lower through-hole on some groups on the hole tube wall under the following annular table terrace.The plug seat is fixed on the hole inside pipe wall by the obturating plug shear pin.Rubber sleeve is fixed in the annular groove of setting upright joint and hole pipe formation, and its external diameter is greater than the external diameter of hole pipe.Set upright the lobed bar shaped fusiform structure of joint, the maximum outside diameter of its rib overlaps in last elasticity, overlaps between internal diameter and the external diameter in the elasticity down.

Advantage of the present utility model is: the utility model is simple in structure, and is easy to operate.Need not to use perforate plug, pass stopple, blind plate joint etc. to manage interior annexes can cement the well by the cementing half way, can set up circulation after the end of cementing the well, cannula cleaning inwall, the cleaning in the assurance sleeve pipe.

Description of drawings

Fig. 1 drilling-free sizing collar is gone into the well view

Fig. 2 drilling-free sizing collar perforate cover downstream state schematic diagram

Fig. 3 drilling-free sizing collar closes borehole jack, goes up condom downstream state schematic diagram in the elasticity

Cover release conditions schematic diagram in the elasticity on Fig. 4 drilling-free sizing collar

Fig. 5 packoff nipple sealing state schematic diagram

Cover release conditions schematic diagram in the elasticity under Fig. 6 packoff nipple

Fig. 7 interpolation pipe rod structure schematic diagram

Fig. 8 plug

Fig. 9 the utility model general structure schematic diagram

The specific embodiment

The utility model is described in more detail below in conjunction with accompanying drawing.

As Fig. 1-a kind of brill plug half way cementing tool of exempting from shown in Figure 9, comprise drilling-free sizing collar, packoff nipple, interpolation tubing string three parts.Drilling-free sizing collar mainly by top connection 1, body 2, retaining steel ball 3, close borehole jack shear pin 4, go up cover shear pin 5 in the elasticity, close borehole jack 6, go up overlap 7 in the elasticity, perforate cover shear pin 8, perforate cover 9, lower contact 10 constitute.Packoff nipple mainly by pipe nipple body 11, seal rubber sleeve 12, down cover shear pin 13 in the elasticity, overlap 14 in the elasticity down, bottom joint 15 constitutes.The interpolation tubing string mainly by plug 16, oil connection 17, upper boom 18, set upright joint 19, rubber sleeve 20, hole pipe 21, obturating plug shear pin 22, plug seat 23, transfer stock 24, sealed tube 25, taper plug 26, gum cover pipe 27, target seeker 28 to constitute.

Drilling-free sizing collar top connection 1, lower contact 10 link to each other with body 2 upper/lower terminals respectively, and the end face of the bottom surface of top connection 1 and lower contact 10 is deep into body 2 inner chambers and forms two ring-like interior step surfaces up and down.Close borehole jack 6, perforate cover 9, go up in the elasticity cover 7 and all the other components place two ring-like between the step surfaces.Close borehole jack 6 and body 2 for being slidingly matched, pass borehole jack shear pin 4 will close borehole jack 6 and be fixed on the body 2.Close borehole jack 6 outer walls and have a cone tank, retaining steel ball 3 places in the cone tank, and this cone tank and body 2 inwalls form an airtight space.Closing borehole jack 6 inwalls has an annular scalene cone, and on this scalene cone, cover shear pin 5 will be gone up in the elasticity cover 7 and be fixed on and close in the borehole jack 6 in the last elasticity, and cover 7 is slidingly matched with 6 formation of pass borehole jack in the last elasticity.Cover 7 one ends are semicircular ring in the last elasticity, and the other end is combined by several finger-like flexure strips, and its elastic shrinkage state is complete inclined-plane semicircular ring.The top of finger-like flexure strip is a scalene cone, forms with wall circular scalene cones in the borehole jack 6 of pass to cooperate.Close borehole jack 6 bottom wall thickness less than its top wall thickness, close wall circular scalene cone in the borehole jack 6, borehole jack 6 bottoms, pass and perforate and overlap the annular space that 9 end faces form a depression, this annular space length is more than or equal to cover 7 length in the last elasticity.It is the conical surface that perforate is overlapped 9 end faces inner, and the outside is an anchor ring.Perforate cover shear pin 8 is fixed on perforate cover 9 on the body 2.Have several axially cementing holes of symmetry on body 2 walls under the perforate cover shear pin 8, a cementing hole part is covered by perforate cover 9, and another part is communicated with the annular space that forms between perforate cover 9 outer step surfaces and body 2, lower contact 10 end faces; The through hole that has some axial symmetries on body 2 walls under the cementing hole in addition is communicated with this annular space.Perforate is overlapped 9 bottoms and lower contact 10 inwalls for being slidingly matched, and is sealed by encapsulant between the two.

Pipe nipple body 11 inwalls of packoff nipple have the tiltedly interior step surface of an annular, and tiltedly interior step surface of this annular and bottom joint 15 end faces form the annular space of a depression, and this annular space length is more than or equal to overlapping 14 length in the elasticity down.Seal rubber sleeve 12 and taper gum cover 26 match with cover 14 inside in the following elasticity and form sealing.

Interpolation tubing string foot is a target seeker 28.On the target seeker 28, embedded taper gum cover 26 on the outer wall between gum cover pipe 27 and the sealed tube 25.Manage in the hole two annular table terraces up and down on 21 outer walls, the hole under the following annular table terrace is managed and had lower through-hole on some groups on 21 walls.Plug seat 23 is fixed on the hole by obturating plug shear pin 22 and manages 21 inwalls.Rubber sleeve 20 is fixed in the annular grooves of setting upright joint 19 and hole pipe 21 formation, and its external diameter is greater than the external diameter of hole pipe 21.Set upright joint 19 lobed bar shaped fusiform structures, the maximum outside diameter of its rib overlaps 7, overlaps between 14 internal diameters and the external diameter in the elasticity down in last elasticity.

Its operating principle is: drilling-free sizing collar is connected the upper end of external casing packer, its upper joint sleeve tubing string; Packoff nipple is connected the lower end of external casing packer, and it connects completion screen casing string down.At the bottom of above completion tubular column lower going-into-well, one week of turn on pump circulation well cleanup, the normal back termination of pumping of circulation.G.I.H behind interpolation tubing string top jointed rod or the beam hanger.Control lowering velocity and transfer pressure when entering drilling-free sizing collar, treat that interpolation tubing string bottom enters packoff nipple sealed lower portion space after, turn on pump filling external casing packer (ECP); Continue the perforate cover shear pin 8 that turn on pump builds the pressure and cuts off drilling-free sizing collar, it is 9 descending that perforate is overlapped, the exposure of cementing hole.After setting up circulation normally, carry out the cementing well operation.The pump pressure rising is finished for the slurry bruising when plug 16 goes downwards to plug seat 23, and cementing finishes.Termination of pumping presses down the interpolation tubing string, closes borehole jack shear pin 4 and cuts off, and closes the borehole jack 6 descending cementing holes of closing.Continue to press down the interpolation tubing string, cover shear pin 5 is cut off in the last elasticity, in the last elasticity cover 7 with close borehole jack 6 and separate descendingly, 12 finger-like bullet pieces of cover 7 flick under resilient force in the groove that is hidden in pass borehole jack 6 reservations in the last elasticity.Continue to transfer the interpolation tubing string, in the following elasticity that is pressed in packoff nipple, overlap on 14.Cover shear pin 13 is cut off in the following elasticity, and the interior cover 14 of following elasticity discharges and is hidden in the groove of pipe nipple body 11.At this moment, transfer and on carry the interpolation tubing string and do not had any obstruction.Turn on pump is cut off plug seat shear pin 22, and plug 16 and plug seat 23 are together descending, and circulation port exposes, and sets up circulation, and cement paste that may be residual in the irrigating cannula is rinsed well until affirmation.Termination of pumping proposes interpolation tubing string completion.

Claims (1)

1. exempt to bore plug half way cementing tool for one kind, comprise drilling-free sizing collar, packoff nipple, interpolation tubing string three parts; Drilling-free sizing collar is connected the upper end of external casing packer, and packoff nipple is connected the lower end of external casing packer, jointed rod or beam hanger on the interpolation tubing string; It is characterized in that:

The pass borehole jack (6) of drilling-free sizing collar forms with body (2) and is slidingly matched; Close borehole jack (6) outer wall and have a cone tank, retaining steel ball (3) places in the cone tank; Cover (7) forms with pass borehole jack (6) and is slidingly matched in the last elasticity; Cover (7) one ends are semicircular ring in the last elasticity, and the other end is combined by several finger-like flexure strips, and its elastic shrinkage state is complete inclined-plane semicircular ring; Close the annular space of the interior wall circular scalene cone of borehole jack (6), borehole jack (6) bottom, pass and a depression of perforate cover (9) end face formation, this annular space length is more than or equal to cover (7) length in the last elasticity; Have several axially cementing holes of symmetry on body (2) wall under the perforate cover shear pin (8), a cementing hole part is covered by perforate cover (9), the annular space that forms between another part connection outer step surface of perforate cover (9) and body (2), lower contact (10) end face; The through hole that has some axial symmetries on body under the cementing hole (2) wall in addition is communicated with this annular space; Pipe nipple body (11) inwall of packoff nipple has the tiltedly interior step surface of an annular, and tiltedly interior step surface of this annular and bottom joint (15) end face form the annular space of a depression, and this annular space length is more than or equal to overlapping (14) length in the elasticity down; Seal rubber sleeve (12) and taper gum cover (26) match with cover (14) inside in the following elasticity and form sealing;

Embedded taper gum cover (26) on the outer wall between interpolation tubing string gum cover pipe (27) and the sealed tube (25); On pipe (21) outer wall of hole two annular table terraces are up and down arranged, have lower through-hole on some groups on hole pipe (21) wall under the following annular table terrace; Plug seat (23) is fixed on hole pipe (21) inwall by obturating plug shear pin (22); Rubber sleeve (20) is fixed in the annular groove of setting upright joint (19) and hole pipe (21) formation, and its external diameter is greater than the external diameter of hole pipe (21); Set upright the lobed bar shaped fusiform structure of joint (19), the maximum outside diameter of its rib overlaps (7), overlaps between (14) internal diameter and the external diameter in the elasticity down in last elasticity.

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