CN204571915U - Double acting thermal production well special cementing instrument assembly - Google Patents

Abstract

The utility model relates to the technical field of prestressed cementing tools, which is a prestressed cementing tool assembly for double-action thermal recovery wells; The sleeve is fixedly connected to the inner side of the upper part of the ground anchor sleeve through ground anchor shear nails. The inner surface of the middle part of the central sliding sleeve is a tapered surface with a large upper part and a smaller lower part. The rod groove is hinged with a connecting rod in the connecting rod groove. The utility model has a reasonable and compact structure and is easy to use. Through the cooperative use of the ground anchor sleeve, the central sliding sleeve, the connecting rod, the anchor claw, the sliding sleeve ball seat and the baffle plate, automatic synchronous grouting is realized, and the well is washed after running the casing. After the cycle is established, the ball can be cast and pressed to realize the set-up. If the first prestress application is unsuccessful, the second set-up can be realized through the replacement rubber plug. It has the characteristics of safety and reliability, facilitates the operation, and improves the set-up of the ground anchor. Rate.

Description

Double-acting thermal recovery well prestressed cementing tool assembly

technical field

The utility model relates to the technical field of prestressed well cementing tools, which is a prestressed well cementing tool assembly for double-action thermal recovery wells.

Background technique

Steam injection thermal recovery is a common heavy oil production method. Ground anchor is a tool accessory commonly used in steam injection thermal recovery well cementing and completion. The commonly used ground anchor is to push the inside of the ground anchor after injecting ash and then replace the grout rubber plug during well cementing. mechanism, open the anchor claw to realize sitting and hanging, the lower pipe string of the ground anchor must be connected to the forced floating hoop, and the central casing must be grouted in time during the process of lowering the center casing. During this process, there is no synchronous grouting, and when opening the anchor fluke to realize sitting and hanging, it is necessary to apply a pre-tightening force first and then put in the grout replacement rubber plug, which leads to time-consuming and labor-intensive problems.

Contents of the invention

The utility model provides a double-action prestressed cementing tool assembly for thermal recovery wells, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem that the existing ground anchor assembly cannot be synchronously grouted and needs to be connected to forced floating Hoops, to achieve sitting and hanging after cementing, resulting in a long time-consuming problem.

The technical scheme of the utility model is realized through the following measures: a prestressed cementing tool assembly for double-action thermal recovery wells, including ground anchor sleeves, center sliding sleeves, connecting rods, anchor claws and baffles; The sleeve is fixedly connected to the inner side of the upper part of the ground anchor sleeve through ground anchor shear nails. The inner surface of the middle part of the central sliding sleeve is a tapered surface with a large upper part and a smaller lower part. The rod groove is hinged with a connecting rod in the connecting rod groove, and a central casing with an inner diameter smaller than the outer diameter of the central sliding sleeve is fixed at the lower end of the central sliding sleeve, and a fixed block is fixed on the inner side of the middle part of the ground anchor sleeve. The lower part is set on the inner side of the fixed block, and the inner side of the lower end of the central sleeve is fixedly connected with a sliding sleeve ball seat through a shear pin, and there is an anchor fluke recess corresponding to the position of the connecting rod groove on the middle part of the ground anchor sleeve and the fixed block. Groove, the anchor fluke is hinged in the anchor fluke groove, and the lower end of the connecting rod is hinged with the inner side of the middle part of the anchor fluke; a baffle plate is fixedly installed on the inner side of the lower end of the ground anchor sleeve, corresponding to the baffle plate at the position of the ball seat of the sliding sleeve There is at least one circulation hole on the outside.

Below is the further optimization or/and improvement to above-mentioned utility model technical scheme:

The inner surface of the upper part of the above-mentioned sliding sleeve ball seat is a tapered surface with a large upper part and a smaller lower part.

There is a positioning ring installation groove on the upper inner side of the ground anchor sleeve, a positioning ring is installed in the positioning ring mounting groove, and the positioning ring and the center sliding sleeve are fixedly connected together by ground anchor shear nails.

The upper part of the ground anchor sleeve has internal threads or external threads; the lower part of the ground anchor sleeve has internal threads or external threads.

The connecting rod is hinged in the connecting rod groove through the upper pin shaft, and the anchor fluke is hinged in the anchor fluke groove through the lower pin shaft; or/and, the baffle plate and the ground anchor sleeve are fixed and installed together through threads.

At least one sealing ring is installed between the ground anchor sleeve and the central sliding sleeve, at least one sealing ring is installed between the central sleeve and the fixed block, and a sealing ring is installed between the sliding sleeve ball seat and the central sleeve. sealing ring.

The utility model has a reasonable and compact structure and is easy to use. Through the cooperative use of ground anchor sleeves, center sliding sleeves, connecting rods, anchor claws, sliding sleeve ball seats and baffles, automatic synchronous grouting can be realized, and the well can be washed after running the casing. After the cycle is established, the ball can be cast and pressed to realize the sitting and hanging. If the first prestress application is unsuccessful, the second setting and hanging can be realized through the replacement rubber plug. It has the characteristics of safety and reliability, facilitates the operation, and improves the sitting and hanging of the ground anchor Rate.

Description of drawings

Accompanying drawing 1 is the front view semi-sectional structure schematic diagram of the preferred embodiment of the present invention.

Accompanying drawing 2 is the schematic diagram of the main view half-section structure of the utility model throwing the ball to form lame pressure, opening the anchor fluke, and applying prestress.

Accompanying drawing 3 is the main view semi-sectional structural schematic diagram after the utility model continues lame pressure, and the ball seat of the sliding sleeve falls, and the cycle is established.

The codes in the drawings are: 1 is the ground anchor sleeve, 2 is the center sliding sleeve, 3 is the connecting rod, 4 is the anchor claw, 5 is the baffle plate, 6 is the ground anchor shear nail, 7 is the connecting rod groove, 8 10 is the shear pin, 11 is the sliding sleeve ball seat, 12 is the groove of the anchor fluke, 13 is the circulation hole, 14 is the positioning ring, 15 is the upper pin, 16 is the lower pin Axle, 17 is sealing ring.

Detailed ways

The utility model is not limited by the following examples, and the specific implementation manner can be determined according to the technical scheme of the utility model and actual conditions.

In this utility model, for the convenience of description, the description of the relative positional relationship of each component is described according to the layout method of Fig. The relationship is determined according to the layout direction of Figure 1 of the specification.

Below in conjunction with embodiment and accompanying drawing, the utility model is further described:

As shown in Figure 1, the double-acting thermal recovery well prestressed cementing tool assembly includes ground anchor sleeve 1, center sliding sleeve 2, connecting rod 3, anchor fluke 4 and baffle plate 5; Anchor shear nails 6 are fixedly connected to the inner side of the upper part of the ground anchor sleeve 1. The inner side surface of the middle part of the center sliding sleeve 2 is a tapered surface with a large upper part and a smaller lower part. The connecting rod groove 7 is hinged with the connecting rod 3 in the connecting rod groove 7, and the central sleeve 8 with an inner diameter smaller than the outer diameter of the central sliding sleeve 2 is fixed at the lower end of the central sliding sleeve 2, and is fixed on the inner side of the middle part of the ground anchor sleeve 1 There is a fixed block 9, the lower part of the central sleeve 8 is set on the inner side of the fixed block 9, and the inner side of the lower end of the central sleeve 8 is fixedly connected with a sliding sleeve ball seat 11 through a shear pin 10, and the middle part of the ground anchor sleeve 1 and the There is a fluke groove 12 corresponding to the position of the connecting rod groove 7 on the fixed block 9, and the fluke 4 is hinged in the fluke groove 12, and the lower end of the connecting rod 3 is hinged with the inner side of the middle part of the fluke 4; A baffle plate 5 is fixedly installed on the inner side of the lower end of the ground anchor sleeve 1, and at least one circulation hole 13 is arranged on the outside of the baffle plate 5 corresponding to the position of the sliding sleeve ball seat 11. In this way, through the ground anchor sleeve 1, the central sliding sleeve 2, the connecting rod 3, the anchor claw 4, the sliding sleeve ball seat 11 and the baffle plate 5, the grouting can be automatically synchronized, and the ball can be thrown after the casing is run and the well is washed and the cycle is established. Lag pressure is used to realize the setting and hanging. If the first prestress application is unsuccessful, the second setting and hanging can be realized through the replacement rubber plug, which facilitates the operation and improves the setting and hanging rate of the ground anchor.

According to actual needs, the above-mentioned double-acting thermal recovery well prestressed cementing tool assembly can be further optimized or/and improved:

As shown in accompanying drawing 1,2,3, the inner surface of the upper part of sliding sleeve ball seat 11 is the tapered surface with big up and down down. In this way, it is convenient to play a good pressure suppression effect after pitching.

As shown in Figure 1, there is a positioning ring installation groove on the inner side of the upper part of the ground anchor sleeve 1, and a positioning ring 14 is installed in the positioning ring installation groove, and the positioning ring 14 and the center sliding sleeve 2 are fixedly connected by ground anchor shear nails 6 together. In this way, through the positioning ring 14, it can be fixedly connected with the central sliding sleeve 2 to realize the mutual positioning of the central sliding sleeve 2 and the ground anchor sleeve 1, thereby simplifying the processing technology of the ground anchor sleeve 1, and at the same time, it can be replaced separately through maintenance. The positioning ring 14 improves the service life of the ground anchor sleeve 1 .

According to needs, the upper part of the ground anchor sleeve 1 has internal threads or external threads; the lower part of the ground anchor sleeve 1 has internal threads or external threads. In this way, the installation and removal of the ground anchor sleeve 1 is facilitated.

As shown in Figures 1, 2, and 3, the connecting rod 3 is hinged through the upper pin shaft 15 in the connecting rod groove 7, and the fluke 4 is hinged through the lower pin shaft 16 in the fluke groove 12; or/and, The baffle plate 5 and the ground anchor sleeve 1 are fixedly installed together by threads. In this way, the installation, removal and replacement of the baffle plate 5 are facilitated by the threads.

As shown in Figures 1 and 2, at least one sealing ring 17 is installed between the ground anchor sleeve 1 and the central sliding sleeve 2, and at least one sealing ring 17 is installed between the central sleeve 8 and the fixed block 9 , A sealing ring 17 is installed between the sliding sleeve ball seat 11 and the center sleeve 8 . In this way, the sealing ring 17 has a better sealing effect.

The above technical features constitute the best embodiment of the utility model, which has strong adaptability and best implementation effect, and non-essential technical features can be increased or decreased according to actual needs to meet the needs of different situations.

The use process of the best embodiment of the utility model: connect the utility model into the well completion pipe string according to the design, and run the pipe string into the predetermined position. No grouting is required during the casing running process, and the well is cleaned to adjust the mud mud after the pipe string enters the well. To meet the cementing requirements, put in the pressure holding ball and pump it to the inner side of the upper part of the sliding sleeve ball seat 11 to form lame pressure and gradually increase the pressure; in this process, the ground anchor shear nail 6 will be cut first, and then The state is shown in Figure 2. At this time, the center sliding sleeve 2 goes down and pushes the connecting rod 3 to spread the anchor fluke 4, and the anchor fluke 4 is embedded in the formation. The driller lifts it up and applies prestress to the designed tonnage; Cut the pin 10, its state is shown in Figure 3, at this time the sliding sleeve ball seat 11 falls on the baffle plate 5, forming a new circulation channel; In the case of unsuccessful stress application, prestress can be applied a second time when replacing the slurry.

Claims (10)

1. A double-action thermal recovery well prestressed cementing tool assembly is characterized in that it includes ground anchor sleeve, center sliding sleeve, connecting rod, anchor claw and baffle plate; the central sliding sleeve is fixedly connected on the ground anchor shear nail On the inner side of the upper part of the ground anchor sleeve, the inner side of the middle part of the center sliding sleeve is a tapered surface with a large upper part and a smaller lower part. On the outer side of the lower part of the central sliding sleeve, there are at least two connecting rod grooves at intervals along the circumference, which are hinged in the connecting rod grooves. There is a connecting rod, a central sleeve with an inner diameter smaller than the outer diameter of the central sliding sleeve is fixed at the lower end of the central sliding sleeve, a fixed block is fixed inside the middle of the ground anchor sleeve, and the lower part of the central sleeve is sleeved on the inner side of the fixed block. The inner side of the lower end of the center sleeve is fixedly connected with a sliding sleeve ball seat through a shear pin, and there is a fluke groove corresponding to the position of the connecting rod groove on the middle part of the ground anchor sleeve and the fixed block, and is hinged in the fluke groove There is an anchor fluke, and the lower end of the connecting rod is hinged with the inner side of the middle part of the anchor fluke; a baffle plate is fixedly installed on the inner side of the lower end of the ground anchor sleeve, and there is at least one circulation hole on the outer side of the baffle plate corresponding to the position of the sliding sleeve ball seat. 2. The prestressed cementing tool assembly for double-acting thermal recovery wells according to claim 1, characterized in that the inner surface of the upper part of the ball seat of the sliding sleeve is a tapered surface with a larger upper part and a smaller lower part. 3. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 1 or 2, characterized in that the inner surface of the middle part of the central sliding sleeve is a conical surface with a large upper part and a smaller lower part. 4. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 1 or 2, characterized in that there is a positioning ring installation groove on the inner side of the upper part of the ground anchor sleeve, and a positioning ring is installed in the positioning ring installation groove , the positioning ring and the center sliding sleeve are fixedly connected together by ground anchor shear nails. 5. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 3 is characterized in that there is a positioning ring installation groove on the inner side of the upper part of the ground anchor sleeve, and a positioning ring is installed in the positioning ring installation groove, and the positioning The ring and the center sliding sleeve are fixedly connected together by ground anchor shears. 6. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 1 or 2, characterized in that the upper part of the ground anchor sleeve has internal threads or external threads; the lower part of the ground anchor sleeve has internal threads or external thread. 7. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 5, characterized in that the upper part of the ground anchor sleeve has internal threads or external threads; the bottom of the ground anchor sleeve has internal threads or external threads thread. 8. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 1 or 2, characterized in that a connecting rod is hinged through an upper pin shaft in the connecting rod groove, and a lower pin shaft is passed through the anchor claw groove An anchor claw is hinged; or/and, the baffle plate and the ground anchor sleeve are fixed and installed together through threads. 9. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 7, characterized in that a connecting rod is hinged through an upper pin in the connecting rod groove, and a connecting rod is hinged through a lower pin in the fluke groove. An anchor fluke; or/and, the baffle plate and the ground anchor sleeve are fixedly installed together through threads. 10. The double-acting thermal recovery well prestressed cementing tool assembly according to claim 9, characterized in that at least one sealing ring is installed between the ground anchor sleeve and the central sliding sleeve, and between the central casing and the fixed block At least one sealing ring is installed between them, and a sealing ring is installed between the ball seat of the sliding sleeve and the center sleeve.