CN102454379A - Four-winged multifunctional ram blowout preventer - Google Patents

Abstract

The invention provides a four-winged multifunctional ram blowout preventer, wherein an enclosed inner chamber is composed of a main body, a side door assembly and a ram assembly; a locking screw is connected with a locking shaft. Four cavities forming double layers run through on all sides, wherein each layer is provided with two pairs of rams having different specifications; diameters of semi-circular sealed faces of the front ends of the half-sealed rams of the three pairs of half-sealed type ram assemblies are different to be suitable for full sealing and half-sealing for oil pipes with three pipe diameters. The ram blowout preventer is rational in structure, and has a better half-sealed effect and an excellent full-sealed function. The ram blowout preventer brings great convenience for front-line workers in oil fields to operate, ensures work efficiency, has a simple structure, is convenient to use, and is suitable to be spread(promoted) in the oil fields.

Description

The multi-functional ram preventer of four wing formulas

Affiliated technical field

The present invention relates to a kind of oil well control appliance, the multi-functional ram preventer of particularly a kind of four wing formulas.

Background technology

Ram preventer is the oil field in heavy oil wells completion practice, workover treatment and removes and stop the stratum high pressure gas to carry the well kick that crude oil and water possibly form and the generation of blowout secretly in oil pipe operation, oil recovery, the formation testing process, is installed in the safety sealing device of well head for preventing well kick, blowout.

Common ram preventer is formed by body, side door assembly, flashboard assembly three parts.Every layer of ram preventer all has an auxiliary gate-board at corresponding die cavity two ends, and the body die cavity adopts ellipsoidal structure, and the flashboard assembly is made up of preceding seal, top seal, flashboard body, and the locking leading screw connects lock shaft.

The most existing well head needs preventer to have the function of sealing two or three different tube diameters oil pipe; For this reason; People have researched and developed double ram type preventer at present; Half-closed type flashboard summation full-enclosed type flashboard assembly under presenting, it is installed with being provided with, to reach half envelope and full envelope effect preferably in the body of preventer; Now even have triple ram preventer and four ram preventers to appear on the market, it is to adopt two covers or three cover half-closed type flashboard summations, one cover full-enclosed type flashboard assembly, to realize full envelope and to half envelope of two different tube diameters oil pipes.But; That double disc, three flashboards, four ram preventers are respectively is two-layer, three layers, four layers, preventer has increased overall height, the weight of preventer, has increased the operation height of raised platform around a well; Increase operator's work difficulty, brought new inconvenience again for the operator.

Summary of the invention

For overcoming the weak point of prior art; The present invention provides a kind of multi-functional ram preventer of four wing formulas rational in infrastructure; Be double-decker, die cavity all around connects, every layer of flashboard that two pairs of different sizes are installed; The diameter that partly seals the semicircle sealing surface of flashboard front end of three cover half-closed type flashboard assemblies does not wait, to be applicable to half envelope of full envelope and three kinds of caliber oil pipes.

The scheme that the present invention solves this technical problem is:

Whole domestic four wing formula flashboard structures of developing at first of preventer, lower inner cavity upper wall and flashboard joint are welded the embedding seal receptacle respectively on body.Flashboard is when the chamber body central motion; Conflict with the seal receptacle interference in flashboard packing unit upper end; The semicircle rubber concave surface in front end center moves to the center simultaneously, holds the oil pipe of different size tightly, plays the effect of sealing well head; Full envelope chamber flashboard assembly plays the effect of full shut-in well mouth when move at the center, possessed the function of common four ram preventers.

The technical problem that this structure mainly solves does

Because every layer has two auxiliary gate-boards, comprise the oil pipe sealing specification of various sizes, its function is more comprehensive; In the time of in use need sealing the oil pipe of different size, need not dismounting and change flashboard and seal, the present invention has increased by two auxiliary gate-boards; But the employing double-decker, height and weight are well below the four common ram preventers of function of the same race, for shop floor worker operation in oil field brings very big convenience; Guaranteed operating efficiency; And simple in structure, easy to use, be suitable at each elephant and promote.

Description of drawings

Below in conjunction with accompanying drawing and instance the present invention is further specified.

Fig. 1 is a front view of the present invention

Fig. 2 is a vertical view of the present invention

Among Fig. 1,1. be seal receptacle, 2. flange, 3. slotted cheese head screw, 4. flashboard; 5. caulking gum, 6. body, 7. " O " type rubber seal, 8. " O " type rubber seal; 9. interior hexagonal cylinder head bolt, 10. lock shaft, 11. side doors, 12. pads; 13. thrust ball bearing, 14. glands, 15. locking leading screws, 16. sign of direction.

The specific embodiment

Below in conjunction with description of drawings, carry out detailed elaboration through instance:

Fig. 1; When needing the oil pipe A of certain specification of sealing, during preventer work, place two interior 4 flashboard assemblies of 6 body die cavities to rotate 10 lock shafts and move to the well head center through manual work with oil pipe A correspondingly-sized; Produce strength translation forward simultaneously; Make two 5 caulking gum contacts hold oil pipe A and extruding generation slight deformation tightly, 5 caulking gums contact and push with 6 body flashboard cavity walls and produce slight deformation simultaneously, because the band that 5 caulking gums constitute seals; At this moment, 4 flashboard assemblies form the initial sealing of preventer upside well head.

When needs seal oil pipe B or the C of other a kind of model; Need not dismantle flashboard as common preventer; Change caulking gum; The 4 flashboard assemblies that directly withdraw from a certain specification are to initial position, and 4 flashboard assemblies of rotation and oil pipe B correspondingly-sized just can be accomplished Seal Oil pipe ring shape space by normal running then.

When needs are shunt in a well, directly rotate both sides full envelope 4 flashboards by common ram preventer, can accomplish full shut-in well mouth.

Claims (2)

1. the multi-functional ram preventer of four wing formulas constitutes closed inner chamber by body, side door assembly, flashboard assembly, and the locking leading screw connects lock shaft.It is characterized in that: product is four wing formula structures, double-deck four chambeies, and the axis of every layer of flashboard assembly is in the same horizontal plane.

2. the multi-functional ram preventer of four wing formulas according to claim 1 is characterized in that: partly seal paddle type and the rectangular structure of blind rams die cavity on the above-mentioned body; Every stratotype chamber all around connects, every layer of flashboard that two secondary different sizes are installed, and the diameter that partly seals the semicircle sealing surface of flashboard front end of three cover half-closed type flashboard assemblies does not wait, to be applicable to half envelope of full envelope and three kinds of caliber oil pipes.

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