CN201053300Y

CN201053300Y - Throttle kill manifold

Info

Publication number: CN201053300Y
Application number: CNU2007200712637U
Authority: CN
Inventors: 陈建光; 孙国安; 陆家琛; 沈永兴
Original assignee: Shanghai Shenkai Oil Extraction Equipment Co Ltd; Shanghai SK Petroleum Chemical Equipment Corp Ltd
Current assignee: Shanghai Shenkai Oil Extraction Equipment Co Ltd; Shanghai SK Petroleum Chemical Equipment Corp Ltd
Priority date: 2007-06-19
Filing date: 2007-06-19
Publication date: 2008-04-30
Anticipated expiration: 2017-06-19

Abstract

The utility model relates to a throttling killing well manifold, comprising a hydraulically operated long-distance control box, a control throttling manifold, a drilling spool and a killing well manifold, wherein, one end of the drilling spool is connected with the control choke manifold through a valve, and the other end of the drilling spool is connected with the killing well manifold through a valve; the hydraulically operated long-distance control box is connected with the control throttling manifold. The utility model is characterized in that the control choke manifold is of a four-wing structure and the kill-line manifold is of a double-wing structure. The utility model has the advantage that the throttling killing well manifold can more rapidly and stably complete choke circulation and blowout prevention when facing the high pressure grade and high acid corruption working condition.

Description

The throttle well killing manifold

Technical field

The utility model relates to a kind of throttle well killing manifold, is applicable to oil, gas drilling, belongs to oil, gas drilling technical field.

Background technology

Formation fluid is in a single day out of hand in oil, gas drilling process just well kick or blowout out of control may take place, blowout out of control can make the down-hole situation complicated, normal drillng operation be can't carry out, even drilling equipment, destruction petroleum resources etc., the safety that jeopardizes drilling implementer and oil gas well damaged.Throttling, kill manifold are connected to the both sides of preventer, and choke manifold can be realized circulating with choke and open flow by regulating, and can regulate the pressure reduction of the pressure of the drill and casing pressure; Kill manifold can utilize high-pressure slurry control blowout and well kick.The conventional at present choke manifold that uses is double-vane or three wings, and kill manifold is a single-blade.

The function of choke manifold is:

(1) implements kill job by the throttling action of choke valve, replace out contaminated mud while control well muzzle pipe pressure and standpipe pressure in the well, recover of the pressure control of mud fluid column, prevent overflow the shaft bottom;

(2) by the pressure release effect of choke valve, reduce well head pressure, realize " soft closing ";

(3) by a large amount of earial drainage effects of open flow valve, reduce the well head casing pressure, protection wellhead blowout preventor group.The function of kill manifold is:

(1) when shunting in a well entirely with blind rams mouthful, in pit shaft, hangs filling weighted mud by force, implement kill job by kill manifold;

(2) when blowout taking place, by the past well head injection clear water of kill manifold, with anti-burning on fire;

(3) when blowout is caught fire,, can help fire extinguishing by kill manifold injection extinguishing chemical in the pit shaft.

The shortcoming of throttling at present, kill manifold is to corrode operating mode (105MPa, 20%H in the face of high pressure grade peracidity ₂S and 10%CO ₂) time, can not more stably carry out circulating with choke and open flow faster.

Summary of the invention

The purpose of this utility model provides a kind ofly can more stably carry out circulating with choke and open flow faster, regulates the pressure reduction of the pressure of the drill and casing pressure and controls the throttle well killing manifold of blowout and well kick.

For realizing above purpose, the technical solution of the utility model provides a kind of throttle well killing manifold, comprise the Long-distance Control case that surges, control choke manifold, drilling spool, kill manifold, one end of drilling spool is connected with the control choke manifold by valve, the other end is connected with kill manifold by valve, and the Long-distance Control of surging case is connected with the control choke manifold, it is characterized in that, described control choke manifold is four wing structures, and kill manifold is the double-vane structure.

Control choke manifold of the present utility model is four wings and cramped construction, and promptly length is slightly larger than the three wings choke manifold, and width is less than the three wings choke manifold, kill manifold is the double-vane structure, thereby when implementing kill job, be 105MPa in the face of high pressure grade peracidity corrodes operating mode, 20%H ₂S and 10%CO ₂The time, can more stably carry out circulating with choke and open flow faster, regulate pressure reduction and the control blowout and the well kick of the pressure of the drill and casing pressure.

When the utility model has the advantages that, can more stably carry out circulating with choke and open flow faster in the face of high pressure grade peracidity corrosion operating mode.

Description of drawings

Fig. 1 is a throttle well killing manifold structural representation;

Fig. 2,3 is control choke manifold structural representation;

Fig. 4,5 is the kill manifold structural representation.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

As shown in Figure 1, be throttle well killing manifold structural representation, described a kind of throttle well killing manifold is made up of the Long-distance Control case 1 that surges, control choke manifold 2, drilling spool 3, kill manifold 4.

In the face of V-door, drilling spool 3 right flanks are installed choke manifold 2 by valve; Kill manifold 4 is installed by valve by left wing.The Long-distance Control of surging case 1 is controlled choke manifold 2 at far-end by valve,

As Fig. 2, shown in 3, be control choke manifold structural representation, it has 4 throttling passages of second-hand two liquid four wing structures of described control choke manifold 2, by ascending/decending sled seat 5, main open flow passage 7, manually the throttling passage 8 and the throttling passage 9 that surges are formed, main open flow passage 7 both sides are connected with manual throttling passage 8 respectively by manual flap type 6, two throttling passage 9 one ends that surge are connected with manual throttling passage 8 respectively by manual flap type 6, the other end is connected with ascending/decending sled seat 5 both sides by the choke valve 10 that surges, the choke valve 10 that surges commonly used is connected with Long-distance Control case 1 at a distance and controls the throttle opening size by it, have 1 pressure sensor and 2 manometric sensor flanges 13 are located at main open flow passage 7 upper ends, its pressure sensor is connected with the Long-distance Control case 1 that surges, but casing pressure and standpipe pressure during Long-distance Control case 1 display well, manually throttling passage 8 upper ends are provided with standby manual throttle valve 12, two throttling passage 9 ports of export 11 that surge are provided with a pressure sensor and a high pressure gauge, wherein sensor is connected with control case 1 far away, so just can be at its outlet pressure of distal displayed, individual channel all has the manual flap type 6 of different size to come the control access switch.

Shown in Fig. 4,5, be the kill manifold structural representation, the double-vane structure of described kill manifold 4 is made up of ball-and-seat 14, ascending/decending sled seat 16 and kill manifold 17, kill manifold 17 is located in the middle of the ascending/decending sled seat 16, kill manifold 17 left and right sides both wings respectively are provided with a ball-and-seat 14 by manual flap type 6, be provided with 2 manometric flanges 15 and be located at kill manifold 17 tops, can use two slush pumps to carry out kill job more quickly so simultaneously by ball-and-seat 13.The throttle well killing manifold can resist 20%H2S, 10%CO2 sour corrosion.

During drilling well work, the main open flow latus rectum 7 in the centre of choke manifold 2 is a closed condition, the manual flap type 6 that surges in throttling passage 9 and two the manual throttling passages 8 in two of both sides is opened, come the control well bottom pressure by the aperture size that Long-distance Control case 1 is regulated two choke valves 10 that surge, when surging system down, can regulate manual throttle valve 12 and control circulating with choke and bottom pressure.

Excessive at bottom pressure, when strong blowout of disequilibrium takes place, open the main open flow passage 7 in the choke manifold 2, open a manual flap type 6 and kill manifold 4 main relief lines of being sidelong ejiction opening 11 and carry out the while open flow, when open flow still can not the balance shaft bottom, then need to implement kill job.

The manual flap type 6 of the relief line of kill manifold 4 is in generally speaking closes, kill line also is in current floe condition under the effect of ball-and-seat 14, when the needs kill-job, in time open or close under drilling technology personnel's the commander at the scene, weighted mud is squeezed into the shaft bottom to realize kill-job by the ball-and-seat 14 of both sides by slush pump.

Claims

1. throttle well killing manifold, comprise the Long-distance Control case (1) that surges, control choke manifold (2), drilling spool (3), kill manifold (4), one end of drilling spool (3) is connected with control choke manifold (2) by valve, the other end is connected with kill manifold (4) by valve, the Long-distance Control of surging case (1) is connected with control choke manifold (2), it is characterized in that described control choke manifold (2) is four wing structures, kill manifold (4) is the double-vane structure.

2. a kind of throttle well killing manifold according to claim 1, it is characterized in that, four wing structures of described control choke manifold (2) are by ascending/decending sled seat (5), main open flow passage (7), manually throttling passage (8) and the throttling passage that surges (9) are formed, main open flow passage (7) both sides are connected with manual throttling passage (8) respectively by manual flap type (6), two throttling passage (9) one ends that surge are connected with manual throttling passage (8) respectively by manual flap type (6), the other end is connected with ascending/decending sled seat (5) both sides by the choke valve that surges (10), the choke valve (10) that surges is connected with Long-distance Control case (1), have 1 pressure sensor and 2 manometric sensor flanges (13) and be located at main open flow passage (7) upper end, its pressure sensor is connected with the Long-distance Control case (1) that surges, manually throttling passage (8) upper end is provided with manual throttle valve (12), two throttling passages that surge (9) ports of export (11) are provided with a pressure sensor and a high pressure gauge, and wherein sensor is connected with control case far away (1).

3. a kind of throttle well killing manifold according to claim 1, it is characterized in that, described kill manifold (4) is made up of ball-and-seat (14), ascending/decending sled seat (16) and kill manifold (17), kill manifold (17) is located in the middle of the ascending/decending sled seat (16), kill manifold (17) left and right sides both wings respectively are provided with a ball-and-seat (14) by manual flap type (6), are provided with 2 manometric flanges (15) and are located at kill manifold (17) top.