CN1004216B - Cartridge-container hanger using controlling pin - Google Patents

Abstract

The present invention belongs to the technical field of a method and a device which can exploit oil, gas, water and fusible substances from a deep well. The hanging operation of a hanger can finish the hanging or can change the hanging point as long as the lifting action and the drawing action are carried out, so the present invention has the advantages of a long pulling-lifting travel without hanging and midway arbitrary cycle of mud, and a loading tool is provided with a double mechanism with a sealing stretching travel for judging the inverse buckle and the travel display for examining the inverse buckle, and an interlocking mechanism by which the sealing channel can not be damaged when the cement is not filled and the sealing head can be recovered after the cement is filled.

Description

Control pin formula extension hanger

The invention belongs to the method and apparatus technical field that maybe can dissolve material from deep mining oil, gas, water, solubilized.

Tail pipe (production string) hanger is the essential equipment of deep drilling, it connects to form the well post to the tail pipe of different bores and sleeve pipe by certain procedure, reliable fluid passage is provided, thereby changed original method of operating that hangs over well head that the sleeve pipe of all different bores, tail pipe are repeated to overlap, save a large amount of steel, cement, shortened the completion time.

Existing extension hanger has four big classes:

1. projective table type (comprising the fixture block formula), it is that located type hangs, convex shoulder or groove on outer sleeve pipe and the tail pipe hang.Its shortcoming is: one, the located type suspension is subject to buoyancy function and destroys; Two, down-hole essential prepackage boss or groove are subject to silt particle obstruction or wearing and tearing, cause inefficacy; Three, do not have circumferential chucking power, back-off, deviate from the running tool difficulty.

2.J type slot type (comprising J type hook-type) tail pipe links to each other with J type groove on the application cylinder by pin, application cylinder and one pair of slips fuse, by tail pipe " rising-reverse-put down " action slips is opened, be clamped on the outer tube and realize the suspension of tail pipe on outer tube.Its shortcoming is: the drilling rod that must reverse when, hanging has the danger that causes the epimere drilling rod to thread off; Two, go in the well process, rotating naturally of drilling rod or application cylinder can be taken place, cause suspension accident midway; Three, during back-off because the difference of hole deviation, well post, well resistance, well depth condition be can not determine the needed counter-rotating number of turns of well head drilling rod, can cause multi-pass operation.

Fluid pressure type its utilize the pressure that mud pressurization back in the drilling well is produced, cut off shear pin after, promote slips and open and realize hanging.Its shortcoming is: one, complex structure, and troublesome poeration, well head need dispose ball-throwing apparatus, and will there be sealed ball seat in the shaft bottom, and hanger itself will have a cover oil cylinder-piston apparatus, must increase pitching, the pressure of spraining operation during suspension; Two, turn on pump circulation or mud viscosity are big when sleeve pipe is hampered, and when pressure drop increases, all can cut off shear pin, cause suspension accident in advance midway; Three, can not repeat to hang, change the hitch point difficulty.

4. path type hanger external surface has eight pairs of control flumes; form by an elongated slot, short groove with by the lead-over groove that short groove leads to elongated slot for every pair; as long as raise and decentralize the suspension body; can make the control pin on the application cylinder; or enter short groove or enter elongated slot; make the slips gathering or open realization unfreezing or suspension.Its shortcoming is: one, control flume processing difficulties, fluting had both weakened the intensity that hangs body, had also dwindled annular space, were unfavorable for well cementing operation; Two, control flume can not be done very longly, and going into the stroke that does not change groove in the well process only is the part of control flume length, suspension accident ahead of time easily takes place going into well midway.

The suspension of tail pipe must be cooperated by running tool be carried out, and existing running tool has the reverse buckling equipment of not looking for the point of neutralization, and what have cementing bruising rubber plug system and check whether back-off finish lifts the stroke structure.(the sealing stroke that provides 1.2～3.5 meters distances not wait after the back-off screw thread is thrown off, utilizes the variation that lifts the stroke observation suspending weight, judges on ground whether tail pipe and running tool throw off).Its shortcoming is when lifting distance above the sealing stroke, seal promptly destroyed, it is very difficult will recovering seal channel again, particularly complicated well, inclined shaft, ocean well, because wall friction power is big and the component relation of gravity, judges that by the variation of suspending weight whether back-off is finished is very insecure.

The objective of the invention is to create a kind of simple in structure, handling safety, convenience, eliminated the extension hanger of above-mentioned shortcoming reliably.When running tool is delivered to hanging position to tail pipe, as long as with tail pipe handling up and down, when its stroke reaches predetermined value, just can realize hanging, its hitch point can be changed, and can repeatedly hang.It is very long that its safety that does not hang lifts stroke, be enough to satisfy normal drilling tool down, the movable drilling tool of anti-sticking, and the operation requirement of the different operating modes such as heave influence of ocean platform, its running tool has the obvious facility of judging whether back-off is finished, and before can guaranteeing that cement injects, running tool can not be deviate from hanger and keep seal channel.

Fig. 1 is the sectional view of control pin formula extension hanger;

Fig. 2 is the application cylinder inner surface expanded view that the position is sold in control down;

Fig. 3 is the application cylinder inner surface expanded view that goes up control pin position;

Fig. 4 is supporting running tool sectional drawing.

Fig. 1 is the sectional view of control pin formula extension hanger of the present invention.By the suspension body 1 on the tail pipe, slips 2, flat spring 3, application cylinder 4 is contained in the control pin 5 and 8 that hangs on the body, guide finger 7, hyoplastron 6 is formed.The top endoporus that hangs body 1 is shaped on screw thread, be used for being connected with running tool, the inner conical surface of the tapered segment of outer round surface and slips 2 matches, guide finger 7 and control pin 8 on same axial surface with control pin 5 angle of being separated by, pin 7 is slightly shorter than pin 8, be shaped on pointed tooth on the outer round surface of slips 2, be fastened on the flat spring 3 by screw, flat spring 3 usefulness screws and application cylinder 4 fuse, the same angle of being separated by on the internal circular surfaces of application cylinder 4 has two groups of groove a, b, c and e, f, g, h, i, f, the h groove is a shallow slot, have only the short guide finger 7 of length to pass through, in a groove, there is the unidirectional rotating hyoplastron of flexible fulcrum to support the control pin, the unidirectional opening structure of supporting control pin can have multiple pattern, as in inclined hole with a spring roof pressure slice of cylinder structure, only allow a compression spring direction to open and pass through; Ratchet structure and unidirectional hook chip architecture all can be used in this structure.

Transfer running tool, hang body 1 by control pin 5, hyoplastron 6 makes that tail pipe and application cylinder are descending together goes into well, the conical surface and the slips 2 that hang this moment on the body 1 keep the separation point position, when hanger is transferred when hanging position hangs, on carry and hang body 1, by flat spring 3 be close to outer sleeve inner wall and the frictional force that produces to make application cylinder be parked in original position motionless, last control pin 5 be up to will deviate from the application cylinder 4 control flume the time, guide finger 7 has entered control flume and has play the guiding role, tail pipe is carried on continuing, guide finger 7 is 8 replacements of control pin again, up to control down 8 finish automatically because the depth of groove is different change the groove action after, transfer tail pipe again, because when changing groove, the angle that hung the body rotation relative with application cylinder, then control pin 5 is just walked around hyoplastron by another groove and is down moved, and transfers to the conical surface applying of its outer conical surface and slips 2 up to hanging body 1, and slips is opened, be clamped on the inner surface of outer tube, just finished the suspension of tail pipe on outer tube.If will change hanging position, as long as carry tail pipe again, control pin 5 is pushed the top position of getting back to hyoplastron behind the hyoplastron 6 open, the conical surface that hangs on the body 1 and the conical surface of slips are separated again, and slips draws in automatically, returns to the state before hanging, repeat above-mentioned action, can hang again.

Fig. 2 and Fig. 3 are the expanded views of application cylinder inner surface, and a, b, c, e, six grooves of g, i are deep trouth.Allow control pin 5 and 8 and guide finger 7 pass through, two grooves of f, h are shallow slot, only allow guide finger 7 to pass through.It change that groove is performed such: along with the rising of hanging body, control pin 5 is along moving on a groove, guide finger 7 enters the e groove, and control pin 5 breaks away from application cylinder, and guide finger 7 enters the f groove along the e groove, control pin 8 enters the e groove, guide finger 7 breaks away from application cylinders, and control pin 8 improves the groove into g because of not entering the f groove, enters the i groove then, make application cylinder and hang the relative angle of turning right of body, finished and changed groove.Transferring tail pipe time control cotter 8 moves down along the i groove, guide finger 7 enters application cylinder by the h groove, control pin 8 breaks away from application cylinder, and guide finger 7 is descending by the i groove, and control pin 5 enters the b groove, guide finger 7 breaks away from application cylinder, control pin 5 enters the c groove, walks around the bottom that hyoplastron 6 enters a groove, and application cylinder and the relative position that hangs body are resetted, owing to hang moving down of body, slips is worked and realize hanging.Fig. 2 also show the present invention can obtain with short control flume length long do not hang lift stroke, establishing S is that the maximum that does not take place to hang allows to lift stroke, L is the length of control flume, n is the number of guide finger, then has:

S＝A-B+（n+1）（L-d）

If A=L-150, B=50, general L gets 500,

S=(n+2 then) L-(nd+200)

And nd+200 is similar to 1/2L

S≈（n+0.5）L

Promptly for " double-pin type " structure without guide finger, its stroke is about 1.5 times control flume length, with " three pin-type " structure of a guide finger, and S=2.5L, or the like.So just can satisfy the needs of long stroke, and need not strengthen the length of component with the number that increases guide finger.

Fig. 4 is the sectional view of supporting running tool, whether it checks and hangs the function that body throws off except that the usefulness with existing running tool lifts suspending weight, it has a groove on core barrel 11, in seal head, be provided with one with collar 13, when promoting core barrel when collar snaps in groove, be lift stroke during, just can demonstrate irreducible phenomenon on the ground greater than the H value, this just can prove more reliably running tool with hang the judgement that body has separated.Also increased an opening type fixture block 17 in addition and have groove D2 and several elastic grooves in the lower end of core barrel 11 in seal head, before injecting cement, tail plug assembly 19 usefulness shear pins 18 link to each other with core barrel, because D ₄＞D ₃＞D ₁＞D ₂, D then ₃Just can not be by the endoporus of seal head 14, core barrel 11 can not be deviate to hang body and destroy seal channel, plays the effect of protecting seal channel before cement injects.Have only after cementing is finished, cut off shear pin 18, tail plug assembly 19 comes off, and worries pipe 11 on again, because the effect of elastic groove makes D ₃Dwindle, and enter the endoporus of seal head, make fixture block 17 because of being in the D on the core barrel ₂Groove location and in contract D ₄Convex shoulder just is recovered to seal head aboveground together.

The present invention is simple in structure, handling safety, convenience, reliable, simplified processing technology, reduced cost, under various complex working conditions, when implementing in the well suspension sleeve, all can reach into the once successful effect of well, suspension, back-off and recovery, avoided contingent accident, this is concerning operations such as deep-well, complicated well, inclined shaft, directional well, ocean well, and having very, large economy is worth and significance.

Claims (4)

1, a kind of control pin formula extension hanger, it is by suspension body, the control pin of tail pipe, the application cylinder of trough of belt and slips are formed, and hang by corresponding running tool, it is characterized in that hanging that body is provided with two control pins and from zero to a plurality of guide fingers (also can be feather key), move groove certainly and be by guide finger and the differing heights of control pin and the track and the different depth of control flume and realize.

2, the said hanger of claim 1 is characterized in that controlling pin and supports with a kind of unidirectional opening mechanism.

3, the said hanger of claim 1 is characterized in that a control pin and guide finger are on same axial plane, separates an angle with another control pin.

4, the said hanger of claim 1 is characterized in that on the core barrel of running tool a convex shoulder, two grooves being arranged, and the lower end has several elastic grooves, has on the seal head in one in collar and one group to fixture block, and is corresponding with two grooves on the core barrel.

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