CN201705252U - Hydraulic expansion type rotating liner hanger - Google Patents

Abstract

The utility model relates to a hydraulic expansion type rotating liner hanger which mainly comprises a central pipe, a rubber ring, an expansion cone, a hanger body, a spline shaft, a double-head male joint, a hollow rubber plug, a well cementing rubber plug, a rubber plug shear seat and a rubber plug catheter. The hanger body is a reducing expansion pipe, the rubber ring is added at the upper end of the hanger body, the lower end thereof is connected with the double-head male joint, and the spline shaft in the double-head male joint is coupled with spline on the spline shaft; the upper end of the spline shaft is connected with the central pipe, a rupture disc is installed on the spline shaft, the expansion cone is sheathed on the spline shaft, the rubber plug catheter is connected at the lower end of the double-head male joint and the lower end of the rubber plug catheter with a liner; and the hollow rubber plug and the shear seat are arranged in the rubber plug catheter, the shear seat is placed on a shoulder in the rubber plug catheter and the hollow rubber plug is connected with the rubber plug shear seat through pins and threads. The utility model has the advantages that the entire string can be turned during well cementing and the liner well cementing quality and the well cementing success rate are improved; and the trouble in the annular space sealing of the overlapped section of the liners is solved, the back-off is not required after setting, the hand can be directly released and the inner diameter is large.

Description

Hydraulic expansion-type rotary liner hanger

Technical field

The utility model is the rotatable extension hanger of a kind of hydraulic buckling type, hangs tail pipe when being used for liner completion, relates to oil well cementation completion technique field.

Background technology

The liner completion technology is meant the technology that adopts extension hanger to hang liner-type well completion on the sleeve pipe of upper strata, and extension hanger is the essential tool of liner completion.Development along with drilling technology, the continuous rise of drilling technologies such as deep-well, ultradeep well, high angle hole, horizontal well, Multilateral Wells, the little gap of slim-hole well, and the high speed development of old well SIDETRACKING TECHNOLOGY, the liner completion The Application of Technology more and more widely, these are treated that different well carries out the liner completion operation and uses the existing conventional hanger to be difficult to satisfy to produce needs, sometimes even cause great down-hole accident.

At present, extension hanger can be divided into slip-type and buckling type tail pipe hanger by its mode of setting, and slip-type hanger suspension back sealing performance is unreliable, seat is hung the back latus rectum and diminished the danger that has seal leakage and do not open button; And the well cementation of expansion type hanger the time can not be rotated, and exists to replace the dead band, and cementing quality can not get guaranteeing.

Patent publication No. CN200946473Y provides a kind of buckling type tail pipe hanger, adopts hydraulic pressure expansion fashion from top to down to expand, complex structure and can not rotary tail; Patent publication No. CN101173601A and CN101187300A are disclosed to be the expansion rotation hanger of hydraulic pressure and two kinds of expansion fashions of mechanical and hydraulic double-acting, the joint of sending into that connects the expansion hanger assembles inconvenient, and be processed with spline on the hanger body, affect for the later stage operation; The block ring that is used for the secondary bruising simultaneously is positioned at following tube connector and the cement paste of the following tail pipe of tube connector can't be replaced, and also need creep into row down and bore plug.

Deficiency at conventional tail pipe hanger and expansion extension hanger, develop the disclosed inflatable rotary liner hanger of a kind of CN101173601A of being different from and CN101187300A system, this system has the function of effective suspension, sealing and rotation well cementation.

Summary of the invention

The purpose of this utility model is to provide a kind of inflatable rotary liner hanger to the scene, be taken to down and on expansion fashion, sealing and rotation are hung in realization to tail pipe, the deficiency that waterpower leakage, back-off difficulty and the latus rectum of having avoided slip-type hanger to take place diminishes.

The utility model is to realize like this.Hydraulic expansion-type rotary liner hanger mainly is made of central tube, rubber ring, expansion cone, hanger body, splined shaft, two male joint, hollow plug, cementing plug, plug Cut Block and rubber plug pipe.The hanger body links to each other with two male joints, two male joints lower end connects rubber plug pipe, the hanger body is the expansion tube of one section reducing, have one section changeover portion that has the conical surface, be the bell mouth shape structure, the body bigger diameter end does not expand, external diameter was identical with bigger diameter end after miner diameter end expanded, miner diameter end is processed with the multistage rubber ring on the body, and the back rubber ring that expands is close between upper strata sleeve pipe and the hanger body, forms effective seal.Central tube links to each other with splined shaft, and expansion cone is installed on the splined shaft, and expansion cone is up-narrow and down-wide cone through-hole structure, is positioned at body and splined shaft annular space, and its conical surface and hanger body form and be sealed and matched, and splined shaft circumferentially has through hole, and rupture disk is housed in the through hole.The lower end of splined shaft is processed with spline, is of coupled connections with spline in two male joints.Rubber plug pipe is connected two male joint lower ends, its lower end is processed with screw thread, be used for connecting the tail pipe of needs rotation, hollow plug and plug Cut Block all are positioned at rubber plug pipe, the plug Cut Block is placed on the shoulder of rubber plug pipe inside, and hollow plug links to each other with the plug Cut Block by pin and helicitic texture.Cementing plug lower end plug head external diameter is less than plug Cut Block center-hole diameter, and greater than the diameter of hollow plug centre bore, hollow plug can cooperate the composition Compounded rubber plug with cementing plug when well cementation.

Advantage of the present utility model is:

(1) spline by two male joints connects, and tubing string and hanger and tail pipe are fixed in making, tubing string be lowered to the cementing process in can the up and down and whole tubing string of rotation, guarantee that tubing string safety is lowered to, and effectively avoid the mud dead band, and improve displacement efficiency, significantly improve the drilling liner cementing quality; Secondly it is little effectively to solve annular clearance, and tail pipe is difficult to a difficult problem placed in the middle, improves cementing quality and well cementation success rate.

(2) adopt the hydraulic buckling mode to expand, integrate and hang sealing function, can prevent that conventional hanger from sitting puts the waterpower that the back occurs and leaks, saving and squeeze method, expense that the extension hanger packer is relevant to greatest extent, make annular space have necessary waterpower integrality, help boring well deeplyer.

(3) after hanger sit to be hung, do not need back-off, directly give up, look for the point of neutralization inaccurate and the serious accident of button takes place not open when avoiding conventional hanger back-off.

(4) eliminated conventional slips and hung the damage that the upper strata sleeve pipe is caused, and bigger suspension force can be provided and have higher reliability.

(5) adopt integral structure, seat does not have mechanisms such as central tube, slips after hanging, and latus rectum is big in the tubing string, increases inner effective flow area, guarantees the smooth and easy of other intraductal operation.

Description of drawings

Accompanying drawing 1 inflatable rotary liner hanger structural representation

Structural representation after accompanying drawing 2 inflatable rotary liner hangers expand

1 central tube, 2 rubber rings, 3 expansion cone, 4 hanger bodies, 5 rupture disks, 6 splined shafts, 7 splines, 8 crossover subs, 9 plug Cut Blocks, 10 hollow plug 11 rubber plug pipe 12 cementing plugs 13 upper strata sleeve pipes 14 tail pipes

The specific embodiment

Now the utility model will be further described in conjunction with Figure of description.

Shown in accompanying drawing 1, accompanying drawing 2, hydraulic expansion-type rotary liner hanger mainly is made of central tube 1, rubber ring 2, expansion cone 3, hanger body 4, splined shaft 6, two male joint 8, plug Cut Block 9, hollow plug 10, cementing plug 12 and rubber plug pipe 11.Hanger body 4 is the expansion tube of one section reducing, be processed with one section changeover portion that has the conical surface, be the bell mouth shape structure, its miner diameter end adds the individual rubber ring 2 that has, the body lower end links to each other with two male joints 8, two male joints [8] inside is processed with spline, and spline 7 couplings on spline and the splined shaft 6 are fixing.Splined shaft 6 upper ends link to each other with central tube 1, in the circumferential a pair of through hole of splined shaft 6 rupture disk 5 is installed respectively, expansion cone 3 is enclosed within splined shaft 6 upper ends, in the annular space between hanger body 4 and splined shaft 6, its conical surface and hanger body form and are sealed and matched, also can adopt fixedly pipe nipple that expansion cone 3 is fixed between expansion cone 3 and the central tube 1, rubber plug pipe 11 is connected two male joint 8 lower ends, its lower end is processed with screw thread, be used for connecting the tail pipe 14 of needs rotation, hollow plug 10 and plug Cut Block 9 all are positioned at rubber plug pipe 11, plug Cut Block 9 is placed on the shoulder of rubber plug pipe 11 inside, and hollow plug 10 links to each other with plug Cut Block 9 by pin and helicitic texture.Cementing plug 12 lower end external diameters are less than plug Cut Block 9 center-hole diameters, and greater than the diameter of hollow plug 10 centre bores, cementing plug 12 cooperates with hollow plug 10 and forms Compounded rubber plug during well cementation.In splined shaft 6 and the two male joint 8 sealing ring is housed all, guarantees effectively to seal when hanger expands.

As shown in Figure 1 and Figure 2, when the utility model is specifically implemented, adopt central tube 1 to accompany, the conical surface by expansion cone 3 cooperates suspension hanger and tail pipe 14 with the reducing conical surface seal of hanger body 4, make its G.I.H to the precalculated position.After in tubing string, pumping into the cement slurry volume of design during well cementation, drop into cementing plug 12, pump into completion fluid then, it is descending to replace cementing plug 12, safety is by splined shaft 6, arrive rubber plug pipe 11 inherent hollow plug 10 places bruisings, shear plug Cut Block 9, cementing plug 12 cooperates the formation Compounded rubber plug with hollow plug 10.Under the replacement effect of completion fluid, continue descendingly, scrape off the cement paste of tail pipe 14 inwall remnants, in the float shoe of tail pipe 14 bottoms, be built-in with the plug seat that cooperates with Compounded rubber plug, when Compounded rubber plug is replaced to plug seat place, form the secondary bruising, finish the well cementation operation.Being lowered in the process of tubing string, can be by center of rotation pipe 1, the whole tubing string rotation of spline 7 drives by splined shaft 6 and two male joints 8 guarantees that tail pipe tubing string safety is lowered to.Simultaneously when cementing operation, also can be up and down and overall process rotate whole tubing string, solve effectively that annular clearance is little, tail pipe is difficult to a difficult problem placed in the middle, and effectively avoid the mud dead band, improve displacement efficiency, significantly improve tail pipe 14 cementing qualities and well cementation success rate.After the secondary bruising, continue to build the pressure to design pressure, the rupture disk 5 on the splined shaft 6 is opened, the hydraulic cavities in pressure is passed between pipe and hanger body [4].Expansion cone 3 is under the effect of hydraulic pressure, driving splined shaft 6 and central tube 1 moves upward together, hanger body 4 is expanded, rubber ring 2 on the body 4 is close between upper strata sleeve pipe 13 and the hanger body 4, rubber ring [2] can provide reliable sealing and suspension force, form effective seal, realize that the seat of tail pipe 14 strings is hung.After 4 expansions of hanger body finished, expansion cone 3, splined shaft 6 and central tube 1 were released hanger body 4 by hydraulic pressure, enter in the upper strata sleeve pipe 13, realized not needing back-off directly to give up the danger of having avoided slip-type hanger not open button.After giving up, recycle unnecessary cement paste, trip out expansion cone 3, splined shaft 6 and central tube 1, do not bore plug and do not need to creep into down again row.After hanger is sat and hung, have bigger and smooth unified internal diameter, guarantee the smooth and easy of other intraductal operation.

Claims (6)

1. hydraulic expansion-type rotary liner hanger, mainly constitute by central tube [1], rubber ring [2], expansion cone [3], hanger body [4], splined shaft [6], two male joint [8], plug Cut Block [9], hollow plug [10], cementing plug [12] and rubber plug pipe [11], it is characterized in that: hanger body [4] is the expansion tube of one section reducing, the upper end is processed with rubber ring [2], the lower end links to each other with two male joints [8], and spline that two male joints [8] are inner and the spline [7] on the splined shaft [6] are coupled; Splined shaft [6] upper end links to each other with central tube [1], and rupture disk [5] is installed on the splined shaft [6], and expansion cone [3] is enclosed within on the splined shaft [6], and rubber plug pipe [11] is connected two male joint [8] lower ends, and its lower end is processed with screw thread, connects the tail pipe [14] that needs rotation; Hollow plug [10] and plug Cut Block [9] all are positioned at rubber plug pipe [11], and plug Cut Block [9] is placed on the inner shoulder of rubber plug pipe [11], and hollow plug [10] links to each other with plug Cut Block [9] by pin and screw thread.

2. hydraulic expansion-type rotary liner hanger as claimed in claim 1 is characterized in that: hanger body [4] is the expansion tube of one section reducing, is processed with one section changeover portion that has the conical surface, is the bell mouth shape structure.

3. hydraulic expansion-type rotary liner hanger as claimed in claim 1 is characterized in that: expansion cone [3] is up-narrow and down-wide cone through-hole structure, is positioned at hanger body [4] and splined shaft [6] annular space, and its conical surface and hanger body [4] form and be sealed and matched.

4. hydraulic expansion-type rotary liner hanger as claimed in claim 1, it is characterized in that: cementing plug [12] lower end plug head external diameter is less than plug Cut Block [9] center-hole diameter, and greater than the diameter of hollow plug [10] centre bore, cementing plug [12] cooperates the composition Compounded rubber plug with hollow plug [10] when well cementation.

5. hydraulic expansion-type rotary liner hanger as claimed in claim 1 is characterized in that: hanger body [4] upper end face is processed with multistage rubber ring [2].

6. hydraulic expansion-type rotary liner hanger as claimed in claim 1 is characterized in that: sealing ring all is equipped with in splined shaft [6] two ends and two male joints [8] upper end.

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