CN202417384U - Single-bore dual-well wellhead devices - Google Patents

Abstract

The utility model discloses single-bore dual-well wellhead devices, which comprise a casing head (7), a dual-hole substrate (3), a tubing head (8), a tubing-head adapter flange (10), a Christmas tree (11) and hangers, wherein the dual-hole substrate (3) is arranged on a waterproof guide pipe (13); the casing head (7) is arranged on the dual-hole substrate (3); the tubing head (8) is arranged on the casing head (7); a mandrel type casing hanger (12) seals a surface layer casing (14) and is arranged in the dual-hole substrate (3); a slip type casing hanger (6) seals a technical casing (15) and is arranged in the casing head (7); a tubing hanger (9) is arranged in the tubing head (8); the tubing-head adapter flange (10) is arranged on the tubing hanger (9) and the tubing head (8); and Christmas tree (11) is arranged on the tubing-head adapter flange (10). According to the single-bore dual-well wellhead device, the two wellhead devices are arranged by utilizing one waterproof guide pipe, interference between the two wellhead devices is avoided, the space of a platform is saved, drilling operation is easy to perform, and oil is easy to extract.

Description

Monotubular twin-well wellhead assembly

Technical field

The utility model relates to oil well drilling device, is specifically related to a kind of monotubular twin-well wellhead assembly.

Background technology

At present, known most popular wellhead assembly is single wellhead assembly, and this traditional wellhead assembly is in boring the completion process; Can only exploit the oil in an oil reservoir or a location,, always hope with limited well slot for sea and onshore oil field exploitation; Bore more well, or with minimum platform jacket, as far as possible producing wells that bore more; Can practice thrift cost like this, improve development benefit.

Summary of the invention

The purpose of the utility model is: a kind of monotubular twin-well wellhead assembly is provided, utilizes same riser pipe, get out two independently wells; And do not disturb mutually on producing between the well; Practice thrift platform space, utilized limited well slot, can bore more well; Drillng operation is simple, and recovering the oil, it is more convenient to produce.

The scheme of the utility model technical solution problem is: utilize same riser pipe that two wellhead assemblies are installed; This wellhead assembly is made up of the hanger and the sealing thereof of casing head, diplopore pedestal, tubing head, tubing head crossover flange, production tree and each several part; The diplopore pedestal is seated on the riser pipe; Casing head is installed in above the diplopore pedestal, and tubing head is installed in above the casing head, and suspension of mandrel formula casing hanger and sealing surface pipe are seated in the diplopore pedestal; Suspension of slip-type casing tube hanger and Sealing Technology sleeve pipe are seated in the casing head; Boll-weevil hanger is installed in the tubing head, and the tubing head crossover flange is installed in boll-weevil hanger and above the tubing head, production tree is installed in above the tubing head crossover flange.

Wherein, casing head, tubing head and tubing head crossover flange all are designed to the side cut formula.

Wherein, the bottom design of diplopore pedestal has top wire hole, jackscrew is installed in the top wire hole is used to withstand riser pipe and makes riser pipe placed in the middle.

Wherein, be designed with two remedial cementing holes on the diplopore pedestal, remedial cementing is installed plug on the hole, through the remedial cementing hole riser pipe is carried out remedial cementing.

Wherein, be designed with sealing ring on the mandrel formula hanger, seal diplopore pedestal and casing head simultaneously, emergent slips hanger and emergent slips sealing shroud are installed on the mandrel formula hanger, be used for transferring process by situation not in place under the jam when surface pipe.

The utlity model has following advantage: 1. structure is compact, and two cover well heads are installed among the same riser pipe simultaneously, and it is very near that the center of two well heads can be leaned on, and adopts back-to-back mounting means, guarantees phase mutually noninterfere between each valve simultaneously; 2. riser pipe and surface pipe have realized that a drilling well installs two sleeve pipes simultaneously, have simplified operation, greatly reduce the fund of equipment cost; 3. monotubular twin-well well head bottom design has the emergency plan that is in an emergency and uses, and when simplifying the operation, reducing cost, does not cut down the safety of products performance again.

Description of drawings

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

Fig. 2 is the A-A sectional view of Fig. 1.

Among the figure: 1, jackscrew, 2, emergent slips hanger, 3, the diplopore pedestal, 4, emergent slips sealing shroud; 5, plug, 6, the slip-type casing tube hanger, 7, casing head, 8, tubing head; 9, boll-weevil hanger, 10, the tubing head crossover flange, 11, production tree, 12, mandrel formula casing hanger; 13, riser pipe, 14, surface pipe, 15, protective casing, 16, oil pipe.

The specific embodiment

Like Fig. 1, shown in 2; Utilize same riser pipe 13 that two wellhead assemblies are installed; This wellhead assembly is made up of the hanger and the sealing thereof of casing head 7,diplopore pedestal 3, tubing head 8, tubinghead crossover flange 10,production tree 11 and each several part, anddiplopore pedestal 3 is seated on the riser pipe 13, and casing head 7 is installed in above thediplopore pedestal 3; Tubing head 8 is installed in above the casing head 7; 12 suspensions of mandrel formula casing hanger andsealing surface pipe 14 are seated in thediplopore pedestal 3, and 6 suspensions of slip-type casing tube hanger and Sealing Technology sleeve pipe 15 are seated in the casing head 7, and boll-weevil hanger 9 is installed in the tubing head 8; Tubinghead crossover flange 10 is installed in boll-weevil hanger 9 and above the tubing head 8,production tree 11 is installed in above the tubinghead crossover flange 10.

Wherein, casing head 7, tubing head 8 and tubinghead crossover flange 10 all are designed to the side cut formula.

Wherein, the bottom design ofdiplopore pedestal 3 has top wire hole, jackscrew 1 is installed in the top wire hole is used to withstand riser pipe 13 and makes riser pipe placed in the middle.

Wherein, be designed with two remedial cementing holes on thediplopore pedestal 3, plug 5 is installed on the remedial cementing hole, riser pipe 13 is carried out remedial cementing through the remedial cementing hole.

Wherein, Be designed with sealing ring on themandrel formula hanger 12; Seal diploporepedestal 3 and casing head 7 simultaneously, emergent slips hanger 2 and emergent slips sealing shroud 4 are installed on themandrel formula hanger 12, be used for transferring process by situation not in place under the jam whensurface pipe 14.

Claims (5)

1. monotubular twin-well wellhead assembly; It is characterized in that: utilize same riser pipe (13) that two wellhead assemblies are installed; This wellhead assembly is made up of the hanger and the sealing thereof of casing head (7), diplopore pedestal (3), tubing head (8), tubing head crossover flange (10), production tree (11) and each several part; Diplopore pedestal (3) is seated on the riser pipe (13); Casing head (7) is installed in above the diplopore pedestal (3), and tubing head (8) is installed in above the casing head (7), and mandrel formula casing hanger (12) suspension and sealing surface pipe (14) are seated in the diplopore pedestal (3); Slip-type casing tube hanger (6) suspension and Sealing Technology sleeve pipe (15) are seated in the casing head (7); Boll-weevil hanger (9) is installed in the tubing head (8), and tubing head crossover flange (10) is installed in boll-weevil hanger (9) and above the tubing head (8), production tree (11) is installed in above the tubing head crossover flange (10).

2. monotubular twin-well wellhead assembly according to claim 1 is characterized in that: wherein, casing head (7), tubing head (8) and tubing head crossover flange (10) all are designed to the side cut formula.

3. monotubular twin-well wellhead assembly according to claim 1 is characterized in that: wherein, the bottom design of diplopore pedestal (3) has top wire hole, jackscrew (1) is installed in the top wire hole is used to withstand riser pipe (13) and makes riser pipe placed in the middle.

4. monotubular twin-well wellhead assembly according to claim 1; It is characterized in that: wherein; Be designed with two remedial cementing holes on the diplopore pedestal (3), install on the remedial cementing hole plug (50, through the remedial cementing hole riser pipe (13) is carried out remedial cementing.

5. monotubular twin-well wellhead assembly according to claim 1; It is characterized in that: wherein; Be designed with sealing ring on the mandrel formula hanger (12); Seal diplopore pedestal (3) and casing head (7) simultaneously, mandrel formula hanger (12) is gone up emergent slips hanger (2) and emergent slips sealing shroud (4) is installed, and is used for transferring process by situation not in place under the jam when surface pipe (14).

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