SU1609960A1 - Wellhead head for formation tester - Google Patents

Abstract

The invention relates to the mining industry and m. applied when testing wells. The goal is to increase the reliability and safety of the wellhead head (UG) by automatically blocking the fluid flow in an emergency. The UG consists of a hollow cylindrical body 1 in which a barrel 2 is mounted. A crosspiece 3 is housed in it in rotation. In the case 1 there are mounted hard seats 6, a ball valve 7 and a bolt 16 for holding the impact bar. In the barrel 2 there is a staggered sleeve (CB) 10 with through central axial and inclined radial 11 channels. In the axial channel CB 10 a lead screw (B) 15 is installed. On the outer surface of the CB 10 there is a thread that responds to an internal thread in the upper part of the barrel 2. In the lower part of the CB 10 an annular groove 12 and a groove 13 are made on the inner surface. valve 14 in the form of a rod with annular protrusions at the ends. In the annular groove 12 CB 10 a lower annular protrusion of the valve 14 can be placed. The upper annular protrusion of the valve 14 is placed in the groove 13. A channel 11 is formed between the annular groove 12 and the groove 13 CB 10. WITH THE TOP OF THE VALVE 14 MAY BE INTERACTING IN 15 WHICH HAS POSSIBLE AXIAL MOVEMENT. WHEN CONDUCTING TESTS A UG PLASTIC is connected to a drill string. The shut-off of fluid flow is performed by a ball valve 7. In the event of an emergency, the flow rate of the fluid flow increases dramatically. Due to this, the valve 10 is moved upwards, blocking the annular groove 12 in the CB 10 with its lower annular protrusion 10. OPENING THE VALVE 14 UNDER THE PRESSURE IS PERFORMED IN 15. 1 IL.

Description

 wines 3. In case 1, fixed seat 6, ball valve 7 and bolt 16 are installed to hold the impact bar. In the barrel 2 there is a staggered sleeve (CB) 10 with through central HbiM axial and inclined radial 11 channels. In the axial channel CB 10 у | there is a lead screw (B) 15. There is a p | on the outer surface of the CB 10 10, the internal thread BJ of the upper part of the barrel 2 corresponds. In the lower part of the CB 10 10 there are annular rings on the inner surface. groove 12 and p1az 13. In the barrel 2 a valve is installed in | rod form with annular protrusions- Nto at the ends. In the annular groove 112 CB 10 can be positioned: to be lower to the oval protrusion of the valve 14. The upper

five

an annular protrusion of the valve 14 is placed in the groove 13. A channel 11 is made between the annular groove 12 and the groove 13 CB 10. The upper end of the valve 14 can interact B 15, which has the possibility of axial movement. When conducting tests, the UG formation is connected to a drill string. The shut-off of fluid flow is performed by a ball valve 7. In the event of an emergency, the flow rate of the fluid flow increases dramatically. Due to this, the valve 10 is moved upward, blocking the annular groove 12 in the CB 10 with its lower annular protrusion. The opening of the valve 14 under pressure is carried out by the B 15. 1 sludge.

 The invention relates to mining and it can be applied in well testing.

The purpose of the invention is to show the reliability and safety of the operation of the mouth of a head due to the automatic shut off of the fluid flow in an emergency.

The drawing shows the design of the wellhead, a general view.

The orifice head consists of a hollow cylindrical body 1, innocently by means of a thread of a 410M 2 thread. On the trunk 2 a spider 3 with a branch pipe 4 is rotatably mounted. A bearing 5 is placed between the body 1 and the cross. 3 the thrust seats 6 are mounted with a ball valve 7, which is connected by a splined connection with the driving shank 8. The upper thrust seat 6 is installed in the cup 9, abutting the lower end of the barrel 2. Inside the barrel 2 there is a step bushing 10 with through central axial and inclined radially E 1 January channels. The sleeve 10 has on the outer surface of the thread, corresponding to the internal thread in the upper part of the barrel 2. The sleeve 10 is screwed into the barrel 2. In the lower part, the sleeve 10 has on the inner surface an annular groove 12 and a groove 13. Sloped radial channels are made between the annular groove 12 and the groove 13 sleeves 10 for communicating the internal cavities of the barrel 2 and the cross 3.

five

0

five

0

Inside the barrel 2 has a valve 14 in the form of a rod with annular protrusions at the ends. The upper annular protrusion of the valve 14 is placed in the annular groove 13 of the sleeve 10, and the lower can interact with the annular groove 12 of the sleeve 10. In the central axial channel of the sleeve 10 is mounted on the thread with the possibility of axial movement and engagement of the screw 15.

A bolt 16 is installed in the lower part of the housing 1, which holds a shock rod (not shown) for controlling the circulation valve.

The mouth of the head works as follows.

During the formation test, the wellhead is screwed onto the upper pipe of the drill string. Nozzles 4 crosses are tied around with a maned 45 fold and cementing unit. The overflow of fluid flow through the wellhead is performed by means of a ball valve 7. In the event of an emergency (for example, when a manifold rushes at the wellhead), the flow rate of fluid through the wellhead increases dramatically. In this case, the valve 10 moves upward under the action of the flow of fluid, with its lower annular protrusion entering the annular groove 12 of the sleeve 10 and intersecting the flow of fluid through the head. Valve 10 is kept closed

50

55

(Position due to well pressure.

After emergency response, the valve 10 is opened either with the help of the lead screw 15 (when screwing the screw 15 into the sleeve 10, it rests with its lower end on the upper end of the valve 14 and pushes the last of the annular groove 12 of the sleeve 10), or creating a back overpressure using cementing unit.

valve, made in the form of a rod With the help of the lead screw 15, the valve 15 "with annular projections at the ends

moreover, the barrel has an internal thread in the upper part, and the sleeve - the thread on the outer surface, which responds to the internal thread of the barrel, and is made in its lower part on the inner surface with annular grooves to accommodate the lower lance of the first valve protrusion and groove to interact with the upper ring

14 can be fixed in a permanently open position. ,

If it is necessary to descend the cable of instruments or tools into the drill pipe, close the ball valve 7, then unscrew the sleeve 10 from the barrel 2 together with the valve 14 and the lead screw 15. Instead of the sleeve 10, attach a lubricator to the barrel 2, open the ball valve 7 and lower the ball valve 25 instruments or tools per well.

Claims (1)

Invention Formula An orifice head for a test bed of reservoirs, including a hollow chiffing ring housing, a barrel mounted therein, placed on the latter with a protruding valve, the lead screw being installed in the upper part of the central axial bore of the sleeve with the possibility of axial displacement and engagement with the upper valve face, and The inclined radial channels of the sleeve are made between the annular groove and the groove for the communication of the internal cavities of the trunk and the cross. . Editor A. Dolinich Compiled by A. Keibal Tehred L. Oliynyk Order 3713 Circulation 473 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, 4/5, Raushsk nab. the rotation of the crosspiece, the thrust seats placed in the housing, the ball valve mounted on the saddles, the bolt to hold the impact bar, characterized in that, in order to increase the reliability and safety of the wellhead head by automatically re-fitting the fluid flow in an emergency situation, it is equipped with a stepped sleeve with through central axial and inclined radial channels, lead screw and a protrusion of the valve, the spindle screw being installed in the upper part of the central axial bushing channel with the possibility of axial movement and co-operation with the upper end of the valve, and the inclined radial bore channels between the annular groove and the groove for communicating the internal cavities of the trunk and the cross. Proofreader O. Kravtsov Subscription