CN201526299U - Shearing fully-closed flashboard preventer - Google Patents

Abstract

The utility model provides a shearing fully-closed flashboard preventer which comprises a body, a semi-closed flashboard assembly and a fully-closed flashboard assembly, wherein the semi-closed flashboard assembly including a semi-closed locking screw rod, a semi-closed gland, a semi-closed side door and a semi-closed locking shaft, and the fully-closed flashboard assembly including a fully-closed flashboard, a fully-closed locking screw rod, a fully-closed locking nut cap, a fully-closed side door and a fully-closed gland are positioned on a same plane and correspondingly arranged in flashboard cavities at two sides of the body; and the front ends of the fully-closed flashboard and the semi-closed locking shaft are respectively provided with an upper shear plate and a lower shear plate. The flashboard preventer has reasonable structure, not only can quickly shear a cable or a steel wire rope, but also has the function of completely sealing a well mouth, has high sealing reliability, and is abrasion resistant and high-temperature resistant.

Description

A kind of shearing blind rams preventer

Technical field

The utility model relates to a kind of oil well control appliance, particularly a kind of shearing blind rams preventer.

Background technology

Preventer is that the oil field is in completion practice, workover treatment with remove oil pipe, oil recovery, formation testing, drag in the wet goods operation process to preventing that well kick, blowout are installed in the safety sealing device of well head.In well head, often can be useful on the cable or the wire rope of operations such as down-hole well logging, formation testing, perforation, well workover, salvaging, sampling, in case when needing shut-in well, must rapidly it be cut off, to obtain good sealing effectiveness.Existing shearing preventer is normally partly to seal ram preventer, be respectively equipped with at the front end of two half-closed type flashboards and be the scissors plate that distributes up and down, by handling the leading screw of both sides half-closed type flashboard assembly, make the firm and hard existing shearing operation of these two scissors, rely on binding face between two scissors plates to realize sealing simultaneously well head to well inner cable or wire rope.Shear and the function of sealing though existing shearing preventer has, yet because its sealing is a binding face between dependence two scissors plates realizes, so the reliability of its sealing is relatively poor, and wear-resisting, resistance to elevated temperatures is also relatively poor.

The utility model content

For overcoming the deficiencies in the prior art part, the utility model provides a kind of shearing blind rams preventer, and it is rational in infrastructure, can not only cut off cable or wire rope rapidly, and has reliable sealing effect and good wear-resisting, resistance to elevated temperatures.

The technical scheme that its technical problem that solves the utility model adopts is: comprise body, half-closed type flashboard assembly and full-enclosed type flashboard assembly; Include half block tight leading screw, half sealed cover, partly seal side door, partly block the half-closed type flashboard assembly of mandrel and include blind rams, entirely block tight leading screw, block tight nut entirely, the full-enclosed type flashboard assembly that seals side door and full sealed cover entirely is in same plane, is loaded in the flashboard die cavity of body both sides accordingly; At above-mentioned blind rams and the front end that partly blocks mandrel scissors plate and lower scissors plate are housed respectively.

In case borehole pressure is excessive or when cable or wire rope (or cable and wire rope) occurring having in well kick, blowout phenomenon and the well head, tight leading screw and the tight leading screw of full blockade are partly blocked in rotation rapidly simultaneously, make scissors plate and lower scissors plate to the well head central motion, cable in the well head or wire rope are cut off; Then, backward rotation is partly blocked mandrel, and it is resetted, and is rotated further the tight leading screw of full blockade, until blind rams sealing well head.When needing shut-in well, then directly rotate the complete tight leading screw that blocks, make blind rams sealing well head when no cable or wire rope in the well head.

The beneficial effects of the utility model are: it is rational in infrastructure, can not only cut off cable or wire rope rapidly, and has the function of full shut-in well mouth, and sealing reliability is strong, and is wear-resisting, high temperature resistant.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1 be half block tight leading screw, 2 be half sealed cover, 3 be half envelope side door, 4 be half block mandrel, 5 for holder, 6 for the lower scissors plate, 7 for body, 8 be that main latus rectum, 9 is full sealed cover for full envelope side door, 15 for the complete tight nut, 14 that blocks for the complete tight leading screw, 13 that blocks for blind rams, 12 for last scissors plate, 11 for seal receptacle, 10.

The specific embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

The utility model comprises:body 7, half-closed type flashboard assembly and full-enclosed type flashboard assembly; The middle part ofbody 7 is provided withmain latus rectum 8, and the both sides, middle part of mainlatus rectum 8 are provided with left and right flashboard die cavity accordingly; Described half-closed type flashboard assembly includes and half blocks tightleading screw 1, half sealedcover 2, partly sealsside door 3 and partly blockmandrel 4, and the inner of partly blockingmandrel 4 places in the left side flashboard die cavity of body 6.Described full-enclosed type flashboard assembly includeblind rams 11, entirely block tightleading screw 12, entirely blocktight nut 13,seal side door 14 and full sealedcover 15 entirely; Full-enclosed type flashboard 11 places themain latus rectum 8 of theinherent body 7 in template chamber, right side of body 7.The upper andlower seal receptacle 9 that is equipped with at left and right flashboard die cavity.The above-mentioned front end that partly blocksmandrel 4 is equipped withlower scissors plate 6 byholder 5, and the front end ofblind rams 11 is equipped withscissors plate 10;Last scissors plate 10 andlower scissors plate 6 go to upper and lower and are crisscross arranged.

During use, at first the upper and lower opening flange of the utility model by itsbody 7 is installed on the well head of oil well.When in needs sealing oil well and the well head cable or wire rope being arranged, rotate simultaneously and partly block tightleading screw 1 and the tightleading screw 12 of full blockade, drivelower scissors plate 6 andlast scissors plate 10 tomain latus rectum 8 central motions, cable in the well head or wire rope are cut off; Then, backward rotation is partly blockedmandrel 4, and it is resetted, and is rotated further the tightleading screw 12 of full blockade, untilblind rams 11 sealing well heads.When needing shut-in well, then directly rotate the complete tightleading screw 12 that blocks, makeblind rams 11 sealing well heads when no cable or wire rope in the well head.

Claims (1)

1. shear the blind rams preventer for one kind, comprise body, half-closed type flashboard assembly and full-enclosed type flashboard assembly; It is characterized in that: include half block tight leading screw, half sealed cover, partly seal side door, partly block the half-closed type flashboard assembly of mandrel and include blind rams, entirely block tight leading screw, block tight nut entirely, the full-enclosed type flashboard assembly that seals side door and full sealed cover entirely is in same plane, is loaded in the flashboard die cavity of body both sides accordingly; At above-mentioned blind rams and the front end that partly blocks mandrel scissors plate and lower scissors plate are housed respectively.

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