CN208236368U - One kind is anti-to bury motor head assembly - Google Patents

Abstract

The utility model relates to a kind of drilling equipments, one kind is specifically provided to prevent burying motor head assembly, including ball-and-seat assembly, it gives up and circulating sub, described give up is fixed by threaded engagement respectively between ball-and-seat assembly and circulating sub, check valve is equipped in the ball-and-seat assembly, when not working, the check valve blocks the ball-and-seat assembly, the inner wall that circulation piston is fixed by a pin to the circulating sub is equipped in the circulating sub, when pushing dynamic circulating sub for one, the shearing force that pin is generated by thrust is cut, it is connected to outside the circulating sub and circulation piston.By the technical solution in the utility model, solve the problems, such as that motor head is embedded in underground and can not extract.

Description

One kind is anti-to bury motor head assembly

Technical field

The utility model relates to a kind of motor head assemblies, more particularly to one kind to prevent burying motor head assembly.

Background technique

Motor head assembly is a tool important in the well tool of coiled tubing underground, and collection ball-and-seat is slipped out of the hand and pipe nipple and followed Ring valve frequently encounters coiled tubing during underground work and is embedded in the case where underground can not take out in one, faces well Under a few km depths well, how to ensure the problem of capable of freeing after continuous oil well is buried under the ground, be that industry commonly encounters Problem.

Summary of the invention

The purpose of this utility model is that: the utility model is directed to existing industry technology problem, proposes following resolving ideas: Motor head assembly is the front end of coiled tubing underground job part, and coiled tubing is typically due to front end and is stuck in ground end, causes to connect Continuous oil pipe can not operate.The motor head assembly of the utility model design is to try to establish first in the case where encountering and being stuck in ground end Coiled tubing and external circulation change internal and external pressure difference, and the exterior object of motor head assembly is blocked in impact, enable oil pipe Activity；It is further part and the other parts disconnection that will be embedded in underground, by remainder if not can solve the problem of blocking Divide and pulls out ground.

Solution be to provide it is a kind of anti-bury motor head assembly, collect ball-and-seat assembly, slip out of the hand pipe nipple and circulation slide sleeve are in one Body.Wherein the effect of ball-and-seat assembly is to prevent reverse flow of fluids in coiled tubing, and screw rod reversion causes screw rod to damage and prevent Down-hole high pressure is altered to ground；Slip out of the hand pipe nipple effect be can will be separated in motor head assembly by external force, rise rear end Point, to provide channel to lower step down-hole treatment.The effect of circulation slide sleeve was established inside and outside pipe and is followed at the initial stage of underground exception Ring allows motor head assembly to get rid of poverty.The technical solution of the utility model is:

One kind is anti-to bury motor head assembly, including ball-and-seat assembly, releasing pup joint and circulating sub, the releasing pup joint and list It is fixed respectively by threaded engagement between stream valve assembly and circulating sub, valve plate type check valve is equipped in the ball-and-seat assembly, Only fluid is allowed to flow from left to right, circulation slide sleeve is equipped in the circulating sub and is fixed by a pin to the circulating sub Inner wall, when pushing dynamic circulating sub for one, the shearing force cutting that the pin of the fixed circulation slide sleeve is generated by thrust is followed Ring pipe nipple moves right certain distance, leaks out the prefabricated circulation port of circulating sub, the inside and outside connection of tubing string.

Preferably, a power is to block after circulating sub to be applied on steel ball by pressure by a steel ball to generate.

Preferably, releasing pup joint includes that top gives up and gives up with lower part, and the lower part, which is given up, wraps top is given up one End, the top gives up to give up with lower part and be fixed by pin, and one end that the top is given up is extend into lower part gives up, and passes through Mutually concave-convex tooth engagement straggly, an opening lock sleeve bite top by straight-line groove and give up right end, and the opening is locked Set and lower part give up between radial direction form gap, be equipped with and give up sliding sleeve in the lower part is given up, sliding sleeve of giving up passes through pin Nail is fixed on lower part and gives up inner wall, and described piston a part of giving up is located at the gap.

Preferably, when give up described in external force pushes sliding sleeve when, the shearing force of generation cuts the pin of fixed sliding sleeve of giving up, from And sliding sleeve of giving up described in pushing is mobile, the sliding sleeve of giving up is mobile, and described sliding sleeve a part of giving up works as external force far from the gap When top being pulled to give up, opening lock sleeve loosens, and the fixed top of shearing force cutting generated gives up and gives up with lower part Between pin, the top gives up and gives up far from the lower part.

Detailed description of the invention

Fig. 1, which is that one of the utility model is anti-, buries motor head assembly structure schematic diagram.；

Fig. 2, which is that one of the utility model is anti-, buries motor head assembly structure perspective view.

Symbol description:

11 ball-and-seat assemblies；111 valve plate type ball-and-seats；12 releasing pup joints；It gives up on 121 tops；It gives up 122 lower parts； 13 circulating subs；14 opening lock sleeves；15 give up sliding sleeve；16 give up ball seat；17 circulation slide sleeves.

Specific embodiment

As depicted in figs. 1 and 2, a kind of to prevent that burying motor head assembly includes ball-and-seat assembly 11, releasing pup joint 12, circulating sub 13.Wherein unidirectional valve assembly 11 is for preventing liquid reflux, releasing pup joint 12 include top give up 121 and lower part give up 122, lose Hand pipe nipple 12 is used for when motor head assembly is embedded in underground, and lower part is given up by releasing pup joint 12 and 122 stays in underground, top Giving up 121 can retract ground.Circulating sub 13 is used to that horse can be allowed when entire motor head assembly embedment underground can not operate It is connected to inside and outside up to head assembly, establishes inner-outer circulation, so that motor head assembly frees from underground.Overall operation principle and Specific structure is as follows: where passes through threaded engagement respectively between ball-and-seat assembly 11, releasing pup joint 12 and circulating sub 13.Its Valve plate type ball-and-seat 111 there are two setting in middle ball-and-seat assembly 11, specific structure is as shown in the figure, is as shown in the figure valve plate type list Flow the case where valve 111 is opened.111 permission fluids of valve plate type ball-and-seat flow from left to right, when fluid is static or has from dextrad When the trend of left flowing, valve plate type ball-and-seat 111 can be in close state under the action of preloading spring, and fluid is prevented to pass through. To prevent reverse fluid flow, damage downhole tool and the blocking risks such as downhole tool and blowout.It gives up the lower part 122 sets are given up 121 outer surfaces on top, and are fixed by pin, middle and upper part give up 121 one end some extend into lower part It gives up in 122, an opening lock sleeve 14 is given up 121 occlusions by straight-line groove and top, wherein opening lock sleeve 14 and getting along well Lower part give up 122 inner surfaces contact, therefore, top give up 121 external force pulling under can with opening lock sleeve 14 be mutually disengaged (this Saying is in the case where not considering pin).In order to prevent this situation, lower part, which is given up, is equipped with a sliding sleeve 15 of giving up in 122, For specific structure as schemed, sliding sleeve 15 of giving up, which is fixed on lower part by pin, gives up 122(when not having pin, and sliding sleeve 15 of giving up can be with Give up in lower part and move a certain distance in 122), 15 a part of sliding sleeve of giving up is wrapped in opening lock sleeve 14 and gives up with lower part 122 inner walls contact (can not also contact, as long as both gap be less than collet straight-line groove depth, even if because the two not Contact, gap also very little, therefore the two is described as contacting), in this case, external force can not make top give up 121 and under It gives up and is detached between 122 in portion.In addition, top, which is given up, is provided with a ball seat 16 of giving up in 121, structure and 15 class of sliding sleeve of giving up Seemingly, and with sliding sleeve 15 of giving up it offsets.

A circulation slide sleeve 17 is equipped in circulating sub 13,17 structure of circulation slide sleeve is similar with sliding sleeve 15 of giving up, and leads to It crosses pin to be fixed to each other with circulating sub 13, in the case where no pin is fixed, circulation slide sleeve 17 can be in circulating sub 13 Inside move a certain distance.

The above-mentioned position and structure feature for motor head relevant component with the utility model.

The working principle of each section is described below.

In general, a pipeline penetrated through from left to right is formed inside motor head assembly.When fluid from left to right When flowing, can be flowed from right to left when fluid has by the ball-and-seat assembly 11 that is made of two valve plate type ball-and-seats 111 When trend, valve plate type ball-and-seat 111 is in close state under the action of preloading spring, and fluid is prevented to pass through.This can prevent pipe Situations such as reverse fluid flow in column influences the performance and safety of matched other tools, prevents blowout generation.

When entire power tool, which is embedded in underground, to be operated, confirmation can not be extracted tool by normal mode When, it can attempt to again attempt to extract tool by opening circulating sub 13 come circulation well bottom slurry and impurity.Step is such as Under:

Lost into motor head assembly from ground into a steel ball, steel ball is finally located on circulation slide sleeve 17, from well head to It is suppressed in motor head assembly, increases internal pressure.So that steel ball pushes circulation slide sleeve 17 and cuts pin by shearing force.Pin Circulation slide sleeve 17 moves right certain distance after nail fracture, and the circulation port exposed on circulating sub (is not shown, position is solid in figure Near the pin for determining circulation slide sleeve 17), this can allow circulating sub 13 is inside and outside to be connected to, thus total by internal pressure impact motor head At outer mud and impurity, a possibility that motor head assembly is pulled out is improved.

When the above method can not still allow motor head assembly to restore normal, it would be desirable to motor head leading portion is stayed in into underground, He partially returns to ground, and subsequent processing is given to provide channel, this just needs to carry out following steps: staff is from ground to motor A steel ball is thrown again in head assembly withstands on the steel ball in ball seat 16(the step of giving up and the steel ball size size in last step Difference, the steel ball in last step can pass through ball seat 16 of giving up), then by into motor head assembly injection pressure be applied to It gives up ball seat 16, ball seat 16 of giving up applies pressure to sliding sleeve 15 of giving up, so that giving up passes through shearing force between sliding sleeve 15 and pin Pin is cut, so that sliding sleeve 15 of giving up moves forward a distance, so that opening lock sleeve 14 does not have radially The effect of power, under the action of external pull, top give up 121 and the pin given up between 122 of lower part cut, top is lost Hand 121 is detached from lower part and gives up 122.Meanwhile top gives up and 121 overcomes power between the lock sleeve 14 that is open,.Top gives up 121 Oil well is suggested together with unidirectional valve assembly 11.

Claims (4)

1. one kind is anti-to bury motor head assembly, it is characterised in that: described to lose including ball-and-seat assembly, releasing pup joint and circulating sub It is fixed respectively by threaded engagement between hand pipe nipple and ball-and-seat assembly and circulating sub, valve plate is equipped in the ball-and-seat assembly Formula check valve only allows fluid to flow from left to right, and circulation slide sleeve is equipped in the circulating sub and is fixed by a pin to institute The inner wall for stating circulating sub, when pushing dynamic circulating sub for one, the pin of the fixed circulation slide sleeve is cut by what thrust generated Shear force is cut, and circulating sub moves right certain distance, leaks out the prefabricated circulation port of circulating sub, the inside and outside connection of tubing string.

2. one kind as described in claim 1 is anti-to bury motor head assembly, it is characterised in that: one power is by a steel ball It blocks after circulating sub to be applied to by pressure and be generated on steel ball.

3. one kind as described in claim 1 is anti-to bury motor head assembly, it is characterised in that: the releasing pup joint includes that top is given up It gives up with lower part, the lower part, which is given up, wraps one end that top is given up, and the top gives up to give up with lower part to be consolidated by pin Fixed, one end that the top is given up is extend into lower part gives up, and passes through mutually concave-convex tooth engagement straggly, an opening lock sleeve Top is bitten by straight-line groove to give up right end, the opening lock sleeve and lower part give up between radial direction form gap, The lower part is equipped with and gives up sliding sleeve in giving up, and sliding sleeve of giving up is fixed by a pin to lower part and gives up inner wall, the piston one of giving up Part is located at the gap.

4. one kind as claimed in claim 3 is anti-to bury motor head assembly, it is characterised in that: sliding sleeve of giving up described in being pushed when external force When, the shearing force of generation cuts the pin of fixed sliding sleeve of giving up, so that sliding sleeve of giving up described in pushing is mobile, the sliding sleeve shifting of giving up Dynamic, described sliding sleeve a part of giving up is far from the gap, and when external force pulls top to give up, opening lock sleeve loosens, and produces Raw shearing force cut the fixed top give up with lower part give up between pin, the top is given up loses far from the lower part Hand.