CN2567337Y - Tool for sealing in borehole - Google Patents

Abstract

The utility model relates to a sealing tool outside a sleeve tube, which is composed of a seat sealing tool and a cement retainer, wherein, the seat sealing tool part is composed of an upper joint 1, a central tube 2, a steel sleeve 3, a thrust ring 4, a piston 5, a righting body 6, a righting block 7, a spring plate 8, a lower joint 9, a ball seat 10, a baffle ring 11 of the righting block, a locking pin 12, a shearing sleeve 13, a ball basket 14, a breaking joint 15, a plug tube 16, a push cylinder 17, a shearing pin 31 and screws 32; all the components are mutually connected and fitted to jointly realize releasing and righting functions of seat seal. The cement retainer part is composed of a breaking ring 18, an upper slip 19, an upper cone 20, a locking ring 21, an auxiliary ring 22, a bulge preventing ring 23, a rubber cylinder assembly 24, a mandrel 25, a lower cone 26, a lower slip 27, a sealing sleeve 28, a sliding sleeve 29 and a valve seat 30, wherein, the upper and the lower ends of the breaking ring 18 are respectively connected with the breaking joint 15 and the mandrel 25 via threads; while in use, the combined action of all components realizes the functions of separating an upper and a lower oil layers and opening/closing channels. Due to the adoption of the seat sealing tool in which the breaking ring is connected with the cement retainer, the utility model causes a tube pillar for one-time job to squeeze and pour in layers, overcomes the hollow phenomena in repaired sealing cementing segments caused by back-pouring of squeezed poured mortar, shortens construction period, simplifies construction procedure, raises sealing quality and provides a simple, effective and reliable tool for sealing construction with squeezing and pouring.

Description

Sleeve pipe is scurried the sealing instrument outward

The utility model relates to the downhole tool that uses on a kind of oilfield, and particularly a kind of sleeve pipe is scurried the sealing instrument outward.

Cementing quality difference or the inner local deficit of the long-term productive formation of oil well cause that the stratum internal pressure is unbalanced in the drilling completion construction, overlap outer interlayer and scurry in groove and the stratum oil, gas, water layer and scurry mutually and happen occasionally, adopt usually in the past that light pipe, packer or cement retainer carried out the squeeze note operation down.And down in the light pipe squeeze note, can not realize having behind layering squeeze note and the squeeze note existence of problems such as the squeeze note mortar is instead told, the deficit of squeeze note section.

The purpose of this utility model is to provide a kind of sleeve pipe to scurry the sealing instrument outward, and it is the instrument that the one-stop operation tubing string developed on the basis of cement retainer is realized seat envelope, squeeze note, solves successfully that the squeeze note mortar is instead told, the problem of squeeze note deficit, layering squeeze note.

The utility model purpose is to realize like this, it seals instrument by seat, cement retainer two parts are formed, wherein seat envelope instrument is by top connection (1), central tube (2), steel bushing (3), thrust ring (4), piston (5), centralizer body (6), wiper block (7), spring leaf (8), lower contact (9), ball seat (10), wiper block baffle ring (11), lock pin (12), shear sleeve (13), ball indigo plant (14), break joint (15), intubate (16), pushing cylinder (17), shear pin (31), screw (32) is formed, top connection (1) connects with central tube (2) with screw thread, lower contact (9) upper end connects with central tube (2), in the lower end, outward with screw thread and ball indigo plant (14), breaking joint (15) connects, intubate (16) is inserted and is broken in the joint (15), leaves therebetween and breaks ring qualification position; Thrust ring (4), piston (5), be set on the central tube (2), thrust ring (4) is fixed on the central tube (2) with shear pin (31), shear sleeve (13) is set in the lower contact (9), and be fixed in the lower contact (9) with screw (32), lock pin (12) limits on the ball seat (10) that places in the lower contact (9), steel bushing (3) upper end is fixed in the top connection (1) with shear pin (31), lower end and centralizer body (6) upper end is with thread connection, be placed in thrust ring (4), on the piston (5), centralizer body (6) lower end and pushing cylinder (17) are with thread connection, wiper block (7), spring leaf (8) places centralizer body (6) appearance depression position, and is fixing by wiper block baffle ring (11).

Cement retainer part is formed by breaking ring (18), upper slips (19), upper cone (20), lock ring (21), subring (22) protrusion-dispelling ring (23), seal assembly (24), axle (25), lower cone (26), lower slips (27), sealing shroud (28), sliding sleeve (29), valve seat (30), break ring (18) upper and lower end respectively with break joint (15), axle (25) connects, axle (25) lower end connects with valve seat (30); Lower slips (27), lower cone (26), seal assembly (24), protrusion-dispelling ring (23), subring (22), upper cone (20), upper slips (21) are set on the axle (25) successively, and upper cone (20), lower cone (26) are fixed on the axle (25) with shear pin respectively.Sliding sleeve (29), sealing shroud (28) are loaded in the axle (25) in respectively.

Function is given up, set upright to seat envelope instrument realization seat envelope; Each parts acting in conjunction of cement retainer realizes separating upper and lower oil reservoir, the function of open and close passage during use.

During work, this sleeve pipe guest performer sealing instrument is gone into the well by oil pipe, and seat envelope instrument connects with cement retainer by breaking ring.The cement retainer passage of going into the well in the process is opened, down after desired depth, and a beginning seat envelope cement retainer.Along with the one-level shear pin of the rising seat of pump pressure envelope instrument is cut off, steel bushing 3 is descending, driving pushing cylinder 17, to promote upper slipses 19, upper cone 20, seal assembly 24, lower cone 26 descending, along with steel bushing 3 is descending, motive force strengthens, and sleeve pipe is bitten in lower slips 27 spallings, seal assembly 24 is pressed and is expanded, and realizes sealing; Sleeve pipe is bitten in upper slips 19 spallings, and steel bushing 3 is further descending, and upper and lower slips and sleeve pipe are firmly embraced, and breaks ring subsequently and breaks, and cement retainer is realized giving up.Joint piston 5 promotes to cut joint cover 13 and cuts off the secondary shear pin, and lock pin 12 lost efficacy, and ball seat 10 is descending under pump pressure promotes, and seat envelope tool cycle passage is opened, and the squeeze note operation begins.After the squeeze note operation was finished, the moving intubate 16 of upper lifting pipe cornice was up, drove the cement retainer inner sliding sleeve 29 up squeeze note passages of closing, and had prevented to clamp-on the counter of mortar and had told, and finished a tubing string construction of squeeze note operation.

The utility model has been owing to adopted seat envelope instrument to connect with cement retainer by breaking ring, realizes sealing giving up, setting upright and separate upper and lower oil reservoir, the function of open and close passage.Make the one-stop operation tubing string realize the layering squeeze note, overcome counter the telling of squeeze note mortar and cause the generation of repairing sealing well section phenomenon in debt, shorten construction period, simplify construction sequence, improve the sealing quality, for squeeze note sealing job execution provides easy, effective, reliable instrument.The utility model is rational in infrastructure, easy to operate, is well suited for field popularization application, is the ideal tools that present sealing sleeve pipe is scurried outward and oil, gas, water layer are scurried mutually.

Accompanying drawing is a structural representation of the present utility model.

Below in conjunction with accompanying drawing the utility model is further specified.

As shown in the figure, the utility model seat envelope tools section by top connection 1, central tube 2, steel bushing 3, thrust ring 4, piston 5, centralizer body 6, wiper block 7, spring leaf 8, lower contact 9, ball seat 10, wiper block baffle ring 11, lock pin 12, shear sleeve 13, ball indigo plant 14, break joint 15, intubate 16, pushing cylinder 17 and form.Each parts connects cooperation mutually, and function is given up, set upright to the common seat envelope that realizes; Cement retainer part is formed by breaking ring 18, upper slips 19, upper cone 20, lock ring 21, subring 22, protrusion-dispelling ring 23, packing element assembly 24, axle 25, lower cone 26, lower slips 27, sealing shroud 28, sliding sleeve 29, valve seat 30, break the ring 18 upper and lower ends with screw thread respectively with break joint 15, axle 25 connects, each parts acting in conjunction, realize separating upper and lower oil reservoir, the function of open and close passage during use.

The utility model divides two parts in design.The one, seat envelope tools section, this part have two kinds of functions envelope function that realizes giving up in design under action of hydraulic force; To go into the well the function of setting upright in the process of entire tool.The 2nd, cement retainer part, this part satisfy the demand of the upper and lower oil reservoir of packing in design; Open and close passage demand when satisfy squeezing grey job execution.This design prevents that advantageously the squeeze note mortar from instead telling, the generation of squeeze note deficit, is that mortar enters the door of waiting to squeeze the location.

Development of the present utility model has solved oil well casing and has scurried the production problem that influence is recovered the oil outward, has realized that tubing string finishes the squeeze note operation, shortens construction period, increases work efficiency.Overcome that mortar after the squeeze note operation is instead told, the generation of squeeze note section phenomenon in debt, realized that the operation of layering squeeze note, easy, efficient, high-quality realize that cover is outer and scurry the purpose that tubing string of groove repairing work construction is finished.

Claims (2)

1, a kind of sleeve pipe is scurried the sealing instrument outward, it seals instrument by seat, cement retainer two parts are formed, wherein seat envelope instrument is by top connection (1), central tube (2), steel bushing (3), thrust ring (4), piston (5), centralizer body (6), wiper block (7), spring leaf (8), lower contact (9), ball seat (10), wiper block baffle ring (11), lock pin (12), shear sleeve (13), ball indigo plant (14), break joint (15), intubate (16), pushing cylinder (17), shear pin (31), screw (32) is formed, the cement retainer part is by breaking ring (18), upper slips (19), upper cone (20), lock ring (21), subring (22) protrusion-dispelling ring (23), seal assembly (24), axle (25), lower cone (26), lower slips (27), sealing shroud (28), sliding sleeve (29), valve seat (30) is formed, it is characterized in that: top connection (1) connects with central tube (2) with screw thread, lower contact (9) upper end connects with central tube (2), in the lower end, outward with screw thread and ball indigo plant (14), breaking joint (15) connects, intubate (16) is inserted and is broken in the joint (15), leaves therebetween and breaks ring qualification position; Thrust ring (4), piston (5), be set on the central tube (2), thrust ring (4) is fixed on the central tube (2) with shear pin (31), shear sleeve (13) is set in the lower contact (9), and be fixed in the lower contact (9) with screw (32), lock pin (12) limits on the ball seat (10) that places in the lower contact (9), steel bushing (3) upper end is fixed in the top connection (1) with shear pin (31), lower end and centralizer body (6) upper end is with thread connection, be placed in thrust ring (4), on the piston (5), centralizer body (6) lower end and pushing cylinder (17) are with thread connection, wiper block (7), spring leaf (8) places centralizer body (6) appearance depression position, and is fixing by wiper block baffle ring (11); Break ring (18) upper and lower end respectively with break joint (15), axle (25) connects, axle (25) lower end connects with valve seat (30); Lower slips (27), lower cone (26), seal assembly (24), protrusion-dispelling ring (23), subring (22), upper cone (20), upper slips (21) are set on the axle (25) successively, and upper cone (20), lower cone (26) are fixed on the axle (25) with shear pin respectively.Sliding sleeve (29), sealing shroud (28) are loaded in the axle (25) in respectively.

2, sleeve pipe according to claim 1 is scurried the sealing instrument outward, it is characterized in that:

Described seal assembly (24) is the packing element assembly.

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