CN202381008U - Split expansion cone - Google Patents

Abstract

The utility model relates to the technical field of expansion cones for well drilling in oil-gas fields, in particular to a split expansion cone, which comprises an expansion cone body and a cone ring. A cavity is arranged in the expansion cone body, the outer wall of the lower portion of the expansion cone body is a big-end-up conical surface, the outer diameter of the cone ring is larger than that of the expansion cone body, the inner wall of the upper portion of the cone ring is a big-end-up conical surface, a conical surface seat of the outer wall of the lower portion of the expansion cone body is positioned on the conical surface of the inner wall of the upper portion of the cone ring, and the outer wall of the cone ring is a big-end-up conical surface. The split expansion cone is reasonable and compact in structure and convenient in use, the process of expanding from top to bottom can be realized, the expansion cone can be externally arranged on the upper portion of an expansion sub, an expansion type hanger has a large annular clearance value, circulatory well flushing and cementing operations are facilitated, a guide area, an expansion area and a sizing area are integrally designed on the cone ring, and dimensional precision of the expansion cone is ensured.

Description

Split type expansion cone

Technical field

the utility model relates to the drilling well of oil gas field and uses the expansion cone technical field, is a kind of split type expansion cone.

Background technology

in the oilfield drilling operation, hanger is a kind of common liner completion instrument, and expansion cone is to be used for the expansion type hanger expansion pipe nipple necessary key tool of operation that expands.Enlarge because retrospective distortion expansion takes place under the extruding of expansion cone the expansion pipe nipple; After expansion cone is passed through; Expansion pipe nipple internal diameter will shrink 3-8mm, and expansion cone can't withdraw from the expansion pipe nipple, has two kinds so be used for the expansion cone of expansion type hanger expansion pipe nipple expansion operation at present; A kind of is the monolithic expansion cone, and another kind is split type combined expanded awl.Wherein, The monolithic expansion cone is owing to can not withdraw from the expansion pipe nipple of the back generation undergauge that expands; Can only adopt the operation of expanding from bottom to top, its shortcoming is that the gap of expansion cone place hanger and protective casing annular space is less, is unfavorable for circulation well cleanup and cementing job; Present split type combined expanded awl adopts the mode of split vertically; Expansion cone is combined into one in the down-hole before the operation of expanding; The operation of expanding then; Its shortcoming is, controls risk when expansion cone makes up in the down-hole, and the expansion cone dimensional accuracy after the combination does not have the monolithic expansion cone high simultaneously.

Summary of the invention

the utility model provides a kind of split type expansion cone; Overcome the deficiency of above-mentioned prior art, it can effectively solve the problem that existing monolithic expansion cone and split type combined expanded awl can't satisfy circulation well cleanup and cementing job and expansion cone poor dimensional precision.

The technical scheme of the utility model realizes through following measure: a kind of split type expansion cone comprises expansion cone and conical ring; There is cavity the inside of expansion cone; The bottom outer wall of expansion cone is up big and down small taper seat; The external diameter of conical ring is greater than the external diameter of expansion cone; The upper inside wall of conical ring is up big and down small taper seat, and the taper seat seat of expansion cone bottom outer wall is on the taper seat of conical ring upper inside wall, and the outer wall of conical ring is up big and down small taper seat.

Be to the further optimization of above-mentioned utility model technical scheme below or/and improve:

above-mentioned conical ring comprises sizing ring, expansion loop and guided rings, and the lower end of sizing ring is fixed with expansion loop, and the outer wall of sizing ring is cylindrical; The outer wall of expansion loop is up big and down small taper seat; The maximum outside diameter of expansion loop equates that with the external diameter of sizing ring the lower end of expansion loop is fixed with guided rings, and the outer wall of guided rings is cylindrical; The external diameter of guided rings is identical with the minimum outer diameter of expansion loop, and the bottom of guided rings is up big and down small taper seat.

The lower inner wall of above-mentioned expansion cone has annular boss; On the radially convex surface of annular boss annular groove is arranged; The external wall of upper portion of expansion cone has annular concave platform; Annular groove is arranged on the annular concave platform, and the annular concave platform upper edge circumference of annular groove below radially is evenly distributed with the circular hole of at least one.

There is external screw thread the upper end of above-mentioned annular concave platform

the utility model reasonable and compact in structure; Easy to use, because of the technology that can realize expanding from top to bottom, can expansion cone is external on expansion pipe nipple top; Guaranteed that the expansion type hanger has bigger annular clearance value; Be beneficial to circulation well cleanup and cementing job, the boot section, breathing space and the sizing area that design simultaneously on conical ring are an integral body, have guaranteed the dimensional accuracy of expansion cone.

Description of drawings

accompanying drawing 1 is looked the half section structural representation for the master of the utility model most preferred embodiment.

Coding in accompanying drawing is respectively: 1 is expansion cone, and 2 is circular hole, and 3 is the sizing ring, and 4 is expansion loop, and 5 is guided rings, and 6 is annular boss, and 7 is annular groove, and 8 is annular concave platform.

The specific embodiment

the utility model does not receive the restriction of following embodiment, can confirm concrete embodiment according to the technical scheme and the actual conditions of the utility model.

are in the utility model; For the ease of describing; The description of the relative position relation of each parts all is to describe according to the Butut mode of Figure of description 1, as: the position relation of forward and backward, upper and lower, left and right etc. is what to confirm according to the Butut direction of Figure of description.

Below in conjunction with embodiment and accompanying drawing the utility model is further described:

shown in accompanying drawing 1, this split type expansion cone comprises expansion cone 1 and conical ring; There is cavity the inside of expansion cone 1; The bottom outer wall of expansion cone 1 is up big and down small taper seat; The external diameter of conical ring is greater than the external diameter of expansion cone; The upper inside wall of conical ring is up big and down small taper seat, and the taper seat seat of expansion cone 1 bottom outer wall is on the taper seat of conical ring upper inside wall, and the outer wall of conical ring is up big and down small taper seat.The taper seat of the bottom outer wall of expansion cone 1 combines to offset with the taper seat of conical ring upper inside wall, is easy to separate.

Can according to actual needs above-mentioned split type expansion cone be done further to optimize or/and improve:

shown in accompanying drawing 1, conical ring comprises sizing ring 3, expansion loop 4 and guided rings 5, and the lower end of sizing ring 3 is fixed with expansion loop 4; The outer wall of sizing ring 3 is cylindrical, and the outer wall of expansion loop 4 is up big and down small taper seat, and the maximum outside diameter of expansion loop equates with the external diameter of sizing ring; The lower end of expansion loop 4 is fixed with guided rings 5; The outer wall of guided rings 5 is cylindrical, and the external diameter of guided rings 5 is identical with the minimum outer diameter of expansion loop 4, and the bottom of guided rings 5 is up big and down small taper seat.Conical ring is divided into sizing ring 3, expansion loop 4 and guided rings 5, can better makes expansion pipe nipple generation plastic expansion.

are shown in accompanying drawing 1; The lower inner wall of expansion cone 1 has annular boss 6; On the radially convex surface of annular boss 6 annular groove 7 is arranged; The external wall of upper portion of expansion cone 1 has annular concave platform 8, and annular groove 7 is arranged on the annular concave platform 8, and the annular concave platform 8 upper edge circumference of annular groove 7 belows radially are evenly distributed with the circular hole 2 of at least one.Connector member when circular hole 2 is used for expansion cone 1 and is connected with other instruments, the annular grooves 7 in annular groove on the annular boss 6 and 7 annular concave platforms 8 are used to install sealing ring, the sealing function when playing expansion cone 1 and being connected with other instruments.

shown in accompanying drawing 1, there is external screw thread the upper end of annular concave platform 8.Expansion cone 1 can be fixed together through external screw thread with other instruments.

above technical characterictic has constituted the most preferred embodiment of the utility model, and it has stronger compliance and best implementation result, can increase and decrease non-essential technical characterictic according to actual needs, satisfies the demand of different situations.

The use of the utility model most preferred embodiment: this split type expansion cone is under the promotion of fluid cylinder, and the expansion pipe nipple one end entering from the expansion type hanger makes expansion pipe nipple generation plastic expansion; After the expansion operation of accomplishing the expansion pipe nipple; Expansion pipe nipple generation undergauge, sizing ring 3, expansion loop 4 and guided rings 5 part external diameters are greater than the expansion pipe nipple internal diameter after expanding, and the external diameter of expansion cone 1 is less than the internal diameter of expansion pipe nipple; When expansion cone 1 is retreated; Expansion cone 1 separates along the taper seat that mutually combines with conical ring, and expansion cone 1 is realized withdrawing from the expansion pipe nipple, and conical ring is then stayed in the expansion pipe nipple; So conical ring can not influence the suspension operation of expansion type hanger and other follow-up underground work owing to stay in the expansion pipe nipple for cavity structure.

Claims (4)

1. a split type expansion cone is characterized in that comprising expansion cone and conical ring; There is cavity the inside of expansion cone; The bottom outer wall of expansion cone is up big and down small taper seat; The external diameter of conical ring is greater than the external diameter of expansion cone; The upper inside wall of conical ring is up big and down small taper seat, and the taper seat seat of expansion cone bottom outer wall is on the taper seat of conical ring upper inside wall, and the outer wall of conical ring is up big and down small taper seat.

2. split type expansion cone according to claim 1; It is characterized in that conical ring comprises sizing ring, expansion loop and guided rings, the lower end of sizing ring is fixed with expansion loop, and the outer wall of sizing ring is cylindrical; The outer wall of expansion loop is up big and down small taper seat; The maximum outside diameter of expansion loop equates that with the external diameter of sizing ring the lower end of expansion loop is fixed with guided rings, and the outer wall of guided rings is cylindrical; The external diameter of guided rings is identical with the minimum outer diameter of expansion loop, and the bottom of guided rings is up big and down small taper seat.

3. split type expansion cone according to claim 1 and 2; The lower inner wall that it is characterized in that expansion cone has annular boss; On the radially convex surface of annular boss annular groove is arranged; The external wall of upper portion of expansion cone has annular concave platform, and annular groove is arranged on the annular concave platform, and the annular concave platform upper edge circumference of annular groove below radially is evenly distributed with the circular hole of at least one.

4. split type expansion cone according to claim 3 is characterized in that in the upper end of annular concave platform external screw thread being arranged.